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.inline.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 #define COMMA ,
 167 
 168 // Choose DT_RETURN_MARK macros  based on the type: float/double -> void
 169 // (dtrace doesn't do FP yet)
 170 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe)    \
 171   FP_SELECT(TypeName, \
 172     DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
 173 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
 174   FP_SELECT(TypeName, \
 175     DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
 176 
 177 
 178 // out-of-line helpers for class jfieldIDWorkaround:
 179 
 180 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
 181   if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
 182     uintptr_t as_uint = (uintptr_t) id;
 183     intptr_t offset = raw_instance_offset(id);
 184     if (is_checked_jfieldID(id)) {
 185       if (!klass_hash_ok(k, id)) {
 186         return false;
 187       }
 188     }
 189     return InstanceKlass::cast(k)->contains_field_offset(offset);
 190   } else {
 191     JNIid* result = (JNIid*) id;
 192 #ifdef ASSERT
 193     return result != NULL && result->is_static_field_id();
 194 #else
 195     return result != NULL;
 196 #endif
 197   }
 198 }
 199 
 200 
 201 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
 202   if (offset <= small_offset_mask) {
 203     Klass* field_klass = k;
 204     Klass* super_klass = field_klass->super();
 205     // With compressed oops the most super class with nonstatic fields would
 206     // be the owner of fields embedded in the header.
 207     while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
 208            InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
 209       field_klass = super_klass;   // super contains the field also
 210       super_klass = field_klass->super();
 211     }
 212     debug_only(NoSafepointVerifier nosafepoint;)
 213     uintptr_t klass_hash = field_klass->identity_hash();
 214     return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
 215   } else {
 216 #if 0
 217     #ifndef PRODUCT
 218     {
 219       ResourceMark rm;
 220       warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
 221     }
 222     #endif
 223 #endif
 224     return 0;
 225   }
 226 }
 227 
 228 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
 229   uintptr_t as_uint = (uintptr_t) id;
 230   intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
 231   do {
 232     debug_only(NoSafepointVerifier nosafepoint;)
 233     // Could use a non-blocking query for identity_hash here...
 234     if ((k->identity_hash() & klass_mask) == klass_hash)
 235       return true;
 236     k = k->super();
 237   } while (k != NULL);
 238   return false;
 239 }
 240 
 241 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
 242   guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
 243   uintptr_t as_uint = (uintptr_t) id;
 244   intptr_t offset = raw_instance_offset(id);
 245   if (VerifyJNIFields) {
 246     if (is_checked_jfieldID(id)) {
 247       guarantee(klass_hash_ok(k, id),
 248     "Bug in native code: jfieldID class must match object");
 249     } else {
 250 #if 0
 251       #ifndef PRODUCT
 252       if (Verbose) {
 253   ResourceMark rm;
 254   warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
 255       }
 256       #endif
 257 #endif
 258     }
 259   }
 260   guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
 261       "Bug in native code: jfieldID offset must address interior of object");
 262 }
 263 
 264 // Wrapper to trace JNI functions
 265 
 266 #ifdef ASSERT
 267   Histogram* JNIHistogram;
 268   static volatile jint JNIHistogram_lock = 0;
 269 
 270   class JNIHistogramElement : public HistogramElement {
 271     public:
 272      JNIHistogramElement(const char* name);
 273   };
 274 
 275   JNIHistogramElement::JNIHistogramElement(const char* elementName) {
 276     _name = elementName;
 277     uintx count = 0;
 278 
 279     while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) {
 280       while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) {
 281         count +=1;
 282         if ( (WarnOnStalledSpinLock > 0)
 283           && (count % WarnOnStalledSpinLock == 0)) {
 284           warning("JNIHistogram_lock seems to be stalled");
 285         }
 286       }
 287      }
 288 
 289 
 290     if(JNIHistogram == NULL)
 291       JNIHistogram = new Histogram("JNI Call Counts",100);
 292 
 293     JNIHistogram->add_element(this);
 294     Atomic::dec(&JNIHistogram_lock);
 295   }
 296 
 297   #define JNICountWrapper(arg)                                     \
 298      static JNIHistogramElement* e = new JNIHistogramElement(arg); \
 299       /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
 300      if (e != NULL) e->increment_count()
 301   #define JNIWrapper(arg) JNICountWrapper(arg);
 302 #else
 303   #define JNIWrapper(arg)
 304 #endif
 305 
 306 
 307 // Implementation of JNI entries
 308 
 309 DT_RETURN_MARK_DECL(DefineClass, jclass
 310                     , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
 311 
 312 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
 313                                   const jbyte *buf, jsize bufLen))
 314   JNIWrapper("DefineClass");
 315 
 316   HOTSPOT_JNI_DEFINECLASS_ENTRY(
 317     env, (char*) name, loaderRef, (char*) buf, bufLen);
 318 
 319   jclass cls = NULL;
 320   DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
 321 
 322   TempNewSymbol class_name = NULL;
 323   // Since exceptions can be thrown, class initialization can take place
 324   // if name is NULL no check for class name in .class stream has to be made.
 325   if (name != NULL) {
 326     const int str_len = (int)strlen(name);
 327     if (str_len > Symbol::max_length()) {
 328       // It's impossible to create this class;  the name cannot fit
 329       // into the constant pool.
 330       THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
 331     }
 332     class_name = SymbolTable::new_symbol(name, CHECK_NULL);
 333   }
 334   ResourceMark rm(THREAD);
 335   ClassFileStream st((u1*)buf, bufLen, NULL, ClassFileStream::verify);
 336   Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));
 337 
 338   if (UsePerfData && !class_loader.is_null()) {
 339     // check whether the current caller thread holds the lock or not.
 340     // If not, increment the corresponding counter
 341     if (ObjectSynchronizer::
 342         query_lock_ownership((JavaThread*)THREAD, class_loader) !=
 343         ObjectSynchronizer::owner_self) {
 344       ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
 345     }
 346   }
 347   Klass* k = SystemDictionary::resolve_from_stream(class_name,
 348                                                    class_loader,
 349                                                    Handle(),
 350                                                    &st,
 351                                                    CHECK_NULL);
 352 
 353   if (log_is_enabled(Debug, class, resolve) && k != NULL) {
 354     trace_class_resolution(k);
 355   }
 356 
 357   cls = (jclass)JNIHandles::make_local(
 358     env, k->java_mirror());
 359   return cls;
 360 JNI_END
 361 
 362 
 363 
 364 static bool first_time_FindClass = true;
 365 
 366 DT_RETURN_MARK_DECL(FindClass, jclass
 367                     , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
 368 
 369 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
 370   JNIWrapper("FindClass");
 371 
 372   HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
 373 
 374   jclass result = NULL;
 375   DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
 376 
 377   // Remember if we are the first invocation of jni_FindClass
 378   bool first_time = first_time_FindClass;
 379   first_time_FindClass = false;
 380 
 381   // Sanity check the name:  it cannot be null or larger than the maximum size
 382   // name we can fit in the constant pool.
 383   if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
 384     THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
 385   }
 386 
 387   //%note jni_3
 388   Handle loader;
 389   Handle protection_domain;
 390   // Find calling class
 391   instanceKlassHandle k (THREAD, thread->security_get_caller_class(0));
 392   if (k.not_null()) {
 393     loader = Handle(THREAD, k->class_loader());
 394     // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
 395     // in the correct class context.
 396     if (loader.is_null() &&
 397         k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
 398       JavaValue result(T_OBJECT);
 399       JavaCalls::call_static(&result, k,
 400                                       vmSymbols::getFromClass_name(),
 401                                       vmSymbols::void_class_signature(),
 402                                       thread);
 403       if (HAS_PENDING_EXCEPTION) {
 404         Handle ex(thread, thread->pending_exception());
 405         CLEAR_PENDING_EXCEPTION;
 406         THROW_HANDLE_0(ex);
 407       }
 408       oop mirror = (oop) result.get_jobject();
 409       loader = Handle(THREAD,
 410         InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->class_loader());
 411       protection_domain = Handle(THREAD,
 412         InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->protection_domain());
 413     }
 414   } else {
 415     // We call ClassLoader.getSystemClassLoader to obtain the system class loader.
 416     loader = Handle(THREAD, SystemDictionary::java_system_loader());
 417   }
 418 
 419   TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
 420   result = find_class_from_class_loader(env, sym, true, loader,
 421                                         protection_domain, true, thread);
 422 
 423   if (log_is_enabled(Debug, class, resolve) && result != NULL) {
 424     trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
 425   }
 426 
 427   // If we were the first invocation of jni_FindClass, we enable compilation again
 428   // rather than just allowing invocation counter to overflow and decay.
 429   // Controlled by flag DelayCompilationDuringStartup.
 430   if (first_time && !CompileTheWorld)
 431     CompilationPolicy::completed_vm_startup();
 432 
 433   return result;
 434 JNI_END
 435 
 436 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
 437                     , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
 438 
 439 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
 440   JNIWrapper("FromReflectedMethod");
 441 
 442   HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
 443 
 444   jmethodID ret = NULL;
 445   DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
 446 
 447   // method is a handle to a java.lang.reflect.Method object
 448   oop reflected  = JNIHandles::resolve_non_null(method);
 449   oop mirror     = NULL;
 450   int slot       = 0;
 451 
 452   if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
 453     mirror = java_lang_reflect_Constructor::clazz(reflected);
 454     slot   = java_lang_reflect_Constructor::slot(reflected);
 455   } else {
 456     assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
 457     mirror = java_lang_reflect_Method::clazz(reflected);
 458     slot   = java_lang_reflect_Method::slot(reflected);
 459   }
 460   Klass* k     = java_lang_Class::as_Klass(mirror);
 461 
 462   KlassHandle k1(THREAD, k);
 463   // Make sure class is initialized before handing id's out to methods
 464   k1()->initialize(CHECK_NULL);
 465   Method* m = InstanceKlass::cast(k1())->method_with_idnum(slot);
 466   ret = m==NULL? NULL : m->jmethod_id();  // return NULL if reflected method deleted
 467   return ret;
 468 JNI_END
 469 
 470 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
 471                     , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
 472 
 473 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
 474   JNIWrapper("FromReflectedField");
 475 
 476   HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
 477 
 478   jfieldID ret = NULL;
 479   DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
 480 
 481   // field is a handle to a java.lang.reflect.Field object
 482   oop reflected   = JNIHandles::resolve_non_null(field);
 483   oop mirror      = java_lang_reflect_Field::clazz(reflected);
 484   Klass* k      = java_lang_Class::as_Klass(mirror);
 485   int slot        = java_lang_reflect_Field::slot(reflected);
 486   int modifiers   = java_lang_reflect_Field::modifiers(reflected);
 487 
 488   KlassHandle k1(THREAD, k);
 489   // Make sure class is initialized before handing id's out to fields
 490   k1()->initialize(CHECK_NULL);
 491 
 492   // First check if this is a static field
 493   if (modifiers & JVM_ACC_STATIC) {
 494     intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
 495     JNIid* id = InstanceKlass::cast(k1())->jni_id_for(offset);
 496     assert(id != NULL, "corrupt Field object");
 497     debug_only(id->set_is_static_field_id();)
 498     // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
 499     ret = jfieldIDWorkaround::to_static_jfieldID(id);
 500     return ret;
 501   }
 502 
 503   // The slot is the index of the field description in the field-array
 504   // The jfieldID is the offset of the field within the object
 505   // It may also have hash bits for k, if VerifyJNIFields is turned on.
 506   intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
 507   assert(InstanceKlass::cast(k1())->contains_field_offset(offset), "stay within object");
 508   ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset);
 509   return ret;
 510 JNI_END
 511 
 512 
 513 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
 514                     , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
 515 
 516 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
 517   JNIWrapper("ToReflectedMethod");
 518 
 519   HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
 520 
 521   jobject ret = NULL;
 522   DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
 523 
 524   methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
 525   assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
 526   oop reflection_method;
 527   if (m->is_initializer()) {
 528     reflection_method = Reflection::new_constructor(m, CHECK_NULL);
 529   } else {
 530     reflection_method = Reflection::new_method(m, false, CHECK_NULL);
 531   }
 532   ret = JNIHandles::make_local(env, reflection_method);
 533   return ret;
 534 JNI_END
 535 
 536 DT_RETURN_MARK_DECL(GetSuperclass, jclass
 537                     , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
 538 
 539 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
 540   JNIWrapper("GetSuperclass");
 541 
 542   HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
 543 
 544   jclass obj = NULL;
 545   DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
 546 
 547   oop mirror = JNIHandles::resolve_non_null(sub);
 548   // primitive classes return NULL
 549   if (java_lang_Class::is_primitive(mirror)) return NULL;
 550 
 551   // Rules of Class.getSuperClass as implemented by KLass::java_super:
 552   // arrays return Object
 553   // interfaces return NULL
 554   // proper classes return Klass::super()
 555   Klass* k = java_lang_Class::as_Klass(mirror);
 556   if (k->is_interface()) return NULL;
 557 
 558   // return mirror for superclass
 559   Klass* super = k->java_super();
 560   // super2 is the value computed by the compiler's getSuperClass intrinsic:
 561   debug_only(Klass* super2 = ( k->is_array_klass()
 562                                  ? SystemDictionary::Object_klass()
 563                                  : k->super() ) );
 564   assert(super == super2,
 565          "java_super computation depends on interface, array, other super");
 566   obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
 567   return obj;
 568 JNI_END
 569 
 570 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
 571   JNIWrapper("IsSubclassOf");
 572 
 573   HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
 574 
 575   oop sub_mirror   = JNIHandles::resolve_non_null(sub);
 576   oop super_mirror = JNIHandles::resolve_non_null(super);
 577   if (java_lang_Class::is_primitive(sub_mirror) ||
 578       java_lang_Class::is_primitive(super_mirror)) {
 579     jboolean ret = (sub_mirror == super_mirror);
 580 
 581     HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
 582     return ret;
 583   }
 584   Klass* sub_klass   = java_lang_Class::as_Klass(sub_mirror);
 585   Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
 586   assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
 587   jboolean ret = sub_klass->is_subtype_of(super_klass) ?
 588                    JNI_TRUE : JNI_FALSE;
 589 
 590   HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
 591   return ret;
 592 JNI_END
 593 
 594 
 595 DT_RETURN_MARK_DECL(Throw, jint
 596                     , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
 597 
 598 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
 599   JNIWrapper("Throw");
 600 
 601   HOTSPOT_JNI_THROW_ENTRY(env, obj);
 602 
 603   jint ret = JNI_OK;
 604   DT_RETURN_MARK(Throw, jint, (const jint&)ret);
 605 
 606   THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
 607   ShouldNotReachHere();
 608   return 0;  // Mute compiler.
 609 JNI_END
 610 
 611 
 612 DT_RETURN_MARK_DECL(ThrowNew, jint
 613                     , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
 614 
 615 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
 616   JNIWrapper("ThrowNew");
 617 
 618   HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
 619 
 620   jint ret = JNI_OK;
 621   DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
 622 
 623   InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
 624   Symbol*  name = k->name();
 625   Handle class_loader (THREAD,  k->class_loader());
 626   Handle protection_domain (THREAD, k->protection_domain());
 627   THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
 628   ShouldNotReachHere();
 629   return 0;  // Mute compiler.
 630 JNI_END
 631 
 632 
 633 // JNI functions only transform a pending async exception to a synchronous
 634 // exception in ExceptionOccurred and ExceptionCheck calls, since
 635 // delivering an async exception in other places won't change the native
 636 // code's control flow and would be harmful when native code further calls
 637 // JNI functions with a pending exception. Async exception is also checked
 638 // during the call, so ExceptionOccurred/ExceptionCheck won't return
 639 // false but deliver the async exception at the very end during
 640 // state transition.
 641 
 642 static void jni_check_async_exceptions(JavaThread *thread) {
 643   assert(thread == Thread::current(), "must be itself");
 644   thread->check_and_handle_async_exceptions();
 645 }
 646 
 647 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
 648   JNIWrapper("ExceptionOccurred");
 649 
 650   HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
 651 
 652   jni_check_async_exceptions(thread);
 653   oop exception = thread->pending_exception();
 654   jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
 655 
 656   HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
 657   return ret;
 658 JNI_END
 659 
 660 
 661 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
 662   JNIWrapper("ExceptionDescribe");
 663 
 664   HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
 665 
 666   if (thread->has_pending_exception()) {
 667     Handle ex(thread, thread->pending_exception());
 668     thread->clear_pending_exception();
 669     if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
 670       // Don't print anything if we are being killed.
 671     } else {
 672       jio_fprintf(defaultStream::error_stream(), "Exception ");
 673       if (thread != NULL && thread->threadObj() != NULL) {
 674         ResourceMark rm(THREAD);
 675         jio_fprintf(defaultStream::error_stream(),
 676         "in thread \"%s\" ", thread->get_thread_name());
 677       }
 678       if (ex->is_a(SystemDictionary::Throwable_klass())) {
 679         JavaValue result(T_VOID);
 680         JavaCalls::call_virtual(&result,
 681                                 ex,
 682                                 KlassHandle(THREAD,
 683                                   SystemDictionary::Throwable_klass()),
 684                                 vmSymbols::printStackTrace_name(),
 685                                 vmSymbols::void_method_signature(),
 686                                 THREAD);
 687         // If an exception is thrown in the call it gets thrown away. Not much
 688         // we can do with it. The native code that calls this, does not check
 689         // for the exception - hence, it might still be in the thread when DestroyVM gets
 690         // called, potentially causing a few asserts to trigger - since no pending exception
 691         // is expected.
 692         CLEAR_PENDING_EXCEPTION;
 693       } else {
 694         ResourceMark rm(THREAD);
 695         jio_fprintf(defaultStream::error_stream(),
 696         ". Uncaught exception of type %s.",
 697         ex->klass()->external_name());
 698       }
 699     }
 700   }
 701 
 702   HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
 703 JNI_END
 704 
 705 
 706 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env))
 707   JNIWrapper("ExceptionClear");
 708 
 709   HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
 710 
 711   // The jni code might be using this API to clear java thrown exception.
 712   // So just mark jvmti thread exception state as exception caught.
 713   JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
 714   if (state != NULL && state->is_exception_detected()) {
 715     state->set_exception_caught();
 716   }
 717   thread->clear_pending_exception();
 718 
 719   HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
 720 JNI_END
 721 
 722 
 723 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
 724   JNIWrapper("FatalError");
 725 
 726   HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
 727 
 728   tty->print_cr("FATAL ERROR in native method: %s", msg);
 729   thread->print_stack();
 730   os::abort(); // Dump core and abort
 731 JNI_END
 732 
 733 
 734 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
 735   JNIWrapper("PushLocalFrame");
 736 
 737   HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
 738 
 739   //%note jni_11
 740   if (capacity < 0 ||
 741       ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
 742     HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
 743     return JNI_ERR;
 744   }
 745   JNIHandleBlock* old_handles = thread->active_handles();
 746   JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
 747   assert(new_handles != NULL, "should not be NULL");
 748   new_handles->set_pop_frame_link(old_handles);
 749   thread->set_active_handles(new_handles);
 750   jint ret = JNI_OK;
 751   HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
 752   return ret;
 753 JNI_END
 754 
 755 
 756 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
 757   JNIWrapper("PopLocalFrame");
 758 
 759   HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
 760 
 761   //%note jni_11
 762   Handle result_handle(thread, JNIHandles::resolve(result));
 763   JNIHandleBlock* old_handles = thread->active_handles();
 764   JNIHandleBlock* new_handles = old_handles->pop_frame_link();
 765   if (new_handles != NULL) {
 766     // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
 767     // This way code will still work if PopLocalFrame is called without a corresponding
 768     // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
 769     // the release_block call will release the blocks.
 770     thread->set_active_handles(new_handles);
 771     old_handles->set_pop_frame_link(NULL);              // clear link we won't release new_handles below
 772     JNIHandleBlock::release_block(old_handles, thread); // may block
 773     result = JNIHandles::make_local(thread, result_handle());
 774   }
 775   HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
 776   return result;
 777 JNI_END
 778 
 779 
 780 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
 781   JNIWrapper("NewGlobalRef");
 782 
 783   HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
 784 
 785   Handle ref_handle(thread, JNIHandles::resolve(ref));
 786   jobject ret = JNIHandles::make_global(ref_handle);
 787 
 788   HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
 789   return ret;
 790 JNI_END
 791 
 792 // Must be JNI_ENTRY (with HandleMark)
 793 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
 794   JNIWrapper("DeleteGlobalRef");
 795 
 796   HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
 797 
 798   JNIHandles::destroy_global(ref);
 799 
 800   HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
 801 JNI_END
 802 
 803 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
 804   JNIWrapper("DeleteLocalRef");
 805 
 806   HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
 807 
 808   JNIHandles::destroy_local(obj);
 809 
 810   HOTSPOT_JNI_DELETELOCALREF_RETURN();
 811 JNI_END
 812 
 813 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
 814   JNIWrapper("IsSameObject");
 815 
 816   HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
 817 
 818   oop a = JNIHandles::resolve(r1);
 819   oop b = JNIHandles::resolve(r2);
 820   jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE;
 821 
 822   HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
 823   return ret;
 824 JNI_END
 825 
 826 
 827 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
 828   JNIWrapper("NewLocalRef");
 829 
 830   HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
 831 
 832   jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
 833 
 834   HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
 835   return ret;
 836 JNI_END
 837 
 838 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
 839   JNIWrapper("EnsureLocalCapacity");
 840 
 841   HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
 842 
 843   jint ret;
 844   if (capacity >= 0 &&
 845       ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
 846     ret = JNI_OK;
 847   } else {
 848     ret = JNI_ERR;
 849   }
 850 
 851   HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
 852   return ret;
 853 JNI_END
 854 
 855 // Return the Handle Type
 856 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
 857   JNIWrapper("GetObjectRefType");
 858 
 859   HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
 860 
 861   jobjectRefType ret;
 862   if (JNIHandles::is_local_handle(thread, obj) ||
 863       JNIHandles::is_frame_handle(thread, obj))
 864     ret = JNILocalRefType;
 865   else if (JNIHandles::is_global_handle(obj))
 866     ret = JNIGlobalRefType;
 867   else if (JNIHandles::is_weak_global_handle(obj))
 868     ret = JNIWeakGlobalRefType;
 869   else
 870     ret = JNIInvalidRefType;
 871 
 872   HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
 873   return ret;
 874 JNI_END
 875 
 876 
 877 class JNI_ArgumentPusher : public SignatureIterator {
 878  protected:
 879   JavaCallArguments*  _arguments;
 880 
 881   virtual void get_bool   () = 0;
 882   virtual void get_char   () = 0;
 883   virtual void get_short  () = 0;
 884   virtual void get_byte   () = 0;
 885   virtual void get_int    () = 0;
 886   virtual void get_long   () = 0;
 887   virtual void get_float  () = 0;
 888   virtual void get_double () = 0;
 889   virtual void get_object () = 0;
 890 
 891   JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
 892     this->_return_type = T_ILLEGAL;
 893     _arguments = NULL;
 894   }
 895 
 896  public:
 897   virtual void iterate( uint64_t fingerprint ) = 0;
 898 
 899   void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
 900 
 901   inline void do_bool()                     { if (!is_return_type()) get_bool();   }
 902   inline void do_char()                     { if (!is_return_type()) get_char();   }
 903   inline void do_short()                    { if (!is_return_type()) get_short();  }
 904   inline void do_byte()                     { if (!is_return_type()) get_byte();   }
 905   inline void do_int()                      { if (!is_return_type()) get_int();    }
 906   inline void do_long()                     { if (!is_return_type()) get_long();   }
 907   inline void do_float()                    { if (!is_return_type()) get_float();  }
 908   inline void do_double()                   { if (!is_return_type()) get_double(); }
 909   inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
 910   inline void do_array(int begin, int end)  { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
 911   inline void do_void()                     { }
 912 
 913   JavaCallArguments* arguments()     { return _arguments; }
 914   void push_receiver(Handle h)       { _arguments->push_oop(h); }
 915 };
 916 
 917 
 918 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
 919  protected:
 920   va_list _ap;
 921 
 922   inline void get_bool()   {
 923     // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
 924     // 0 to JNI_FALSE.  Boolean return values from native are normalized the same in
 925     // TemplateInterpreterGenerator::generate_result_handler_for and
 926     // SharedRuntime::generate_native_wrapper.
 927     jboolean b = va_arg(_ap, jint);
 928     _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
 929   }
 930   inline void get_char()   { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg
 931   inline void get_short()  { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg
 932   inline void get_byte()   { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg
 933   inline void get_int()    { _arguments->push_int(va_arg(_ap, jint)); }
 934 
 935   // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests
 936 
 937   inline void get_long()   { _arguments->push_long(va_arg(_ap, jlong)); }
 938   inline void get_float()  { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg
 939   inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }
 940   inline void get_object() { jobject l = va_arg(_ap, jobject);
 941                              _arguments->push_oop(Handle((oop *)l, false)); }
 942 
 943   inline void set_ap(va_list rap) {
 944     va_copy(_ap, rap);
 945   }
 946 
 947  public:
 948   JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
 949        : JNI_ArgumentPusher(signature) {
 950     set_ap(rap);
 951   }
 952   JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
 953       : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
 954     set_ap(rap);
 955   }
 956 
 957   // Optimized path if we have the bitvector form of signature
 958   void iterate( uint64_t fingerprint ) {
 959     if (fingerprint == (uint64_t)CONST64(-1)) {
 960       SignatureIterator::iterate(); // Must be too many arguments
 961     } else {
 962       _return_type = (BasicType)((fingerprint >> static_feature_size) &
 963                                   result_feature_mask);
 964 
 965       assert(fingerprint, "Fingerprint should not be 0");
 966       fingerprint = fingerprint >> (static_feature_size + result_feature_size);
 967       while ( 1 ) {
 968         switch ( fingerprint & parameter_feature_mask ) {
 969           case bool_parm:
 970             get_bool();
 971             break;
 972           case char_parm:
 973             get_char();
 974             break;
 975           case short_parm:
 976             get_short();
 977             break;
 978           case byte_parm:
 979             get_byte();
 980             break;
 981           case int_parm:
 982             get_int();
 983             break;
 984           case obj_parm:
 985             get_object();
 986             break;
 987           case long_parm:
 988             get_long();
 989             break;
 990           case float_parm:
 991             get_float();
 992             break;
 993           case double_parm:
 994             get_double();
 995             break;
 996           case done_parm:
 997             return;
 998             break;
 999           default:
1000             ShouldNotReachHere();
1001             break;
1002         }
1003         fingerprint >>= parameter_feature_size;
1004       }
1005     }
1006   }
1007 };
1008 
1009 
1010 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
1011  protected:
1012   const jvalue *_ap;
1013 
1014   inline void get_bool()   {
1015     // Normalize boolean arguments from native code by converting 1-255 to JNI_TRUE and
1016     // 0 to JNI_FALSE.  Boolean return values from native are normalized the same in
1017     // TemplateInterpreterGenerator::generate_result_handler_for and
1018     // SharedRuntime::generate_native_wrapper.
1019     jboolean b = (_ap++)->z;
1020     _arguments->push_int((jint)(b == 0 ? JNI_FALSE : JNI_TRUE));
1021   }
1022   inline void get_char()   { _arguments->push_int((jint)(_ap++)->c); }
1023   inline void get_short()  { _arguments->push_int((jint)(_ap++)->s); }
1024   inline void get_byte()   { _arguments->push_int((jint)(_ap++)->b); }
1025   inline void get_int()    { _arguments->push_int((jint)(_ap++)->i); }
1026 
1027   inline void get_long()   { _arguments->push_long((_ap++)->j);  }
1028   inline void get_float()  { _arguments->push_float((_ap++)->f); }
1029   inline void get_double() { _arguments->push_double((_ap++)->d);}
1030   inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); }
1031 
1032   inline void set_ap(const jvalue *rap) { _ap = rap; }
1033 
1034  public:
1035   JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1036        : JNI_ArgumentPusher(signature) {
1037     set_ap(rap);
1038   }
1039   JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1040       : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1041     set_ap(rap);
1042   }
1043 
1044   // Optimized path if we have the bitvector form of signature
1045   void iterate( uint64_t fingerprint ) {
1046     if (fingerprint == (uint64_t)CONST64(-1)) {
1047       SignatureIterator::iterate(); // Must be too many arguments
1048     } else {
1049       _return_type = (BasicType)((fingerprint >> static_feature_size) &
1050                                   result_feature_mask);
1051       assert(fingerprint, "Fingerprint should not be 0");
1052       fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1053       while ( 1 ) {
1054         switch ( fingerprint & parameter_feature_mask ) {
1055           case bool_parm:
1056             get_bool();
1057             break;
1058           case char_parm:
1059             get_char();
1060             break;
1061           case short_parm:
1062             get_short();
1063             break;
1064           case byte_parm:
1065             get_byte();
1066             break;
1067           case int_parm:
1068             get_int();
1069             break;
1070           case obj_parm:
1071             get_object();
1072             break;
1073           case long_parm:
1074             get_long();
1075             break;
1076           case float_parm:
1077             get_float();
1078             break;
1079           case double_parm:
1080             get_double();
1081             break;
1082           case done_parm:
1083             return;
1084             break;
1085           default:
1086             ShouldNotReachHere();
1087             break;
1088         }
1089         fingerprint >>= parameter_feature_size;
1090       }
1091     }
1092   }
1093 };
1094 
1095 
1096 enum JNICallType {
1097   JNI_STATIC,
1098   JNI_VIRTUAL,
1099   JNI_NONVIRTUAL
1100 };
1101 
1102 
1103 
1104 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1105   methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1106 
1107   // Create object to hold arguments for the JavaCall, and associate it with
1108   // the jni parser
1109   ResourceMark rm(THREAD);
1110   int number_of_parameters = method->size_of_parameters();
1111   JavaCallArguments java_args(number_of_parameters);
1112   args->set_java_argument_object(&java_args);
1113 
1114   assert(method->is_static(), "method should be static");
1115 
1116   // Fill out JavaCallArguments object
1117   args->iterate( Fingerprinter(method).fingerprint() );
1118   // Initialize result type
1119   result->set_type(args->get_ret_type());
1120 
1121   // Invoke the method. Result is returned as oop.
1122   JavaCalls::call(result, method, &java_args, CHECK);
1123 
1124   // Convert result
1125   if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1126     result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1127   }
1128 }
1129 
1130 
1131 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1132   oop recv = JNIHandles::resolve(receiver);
1133   if (recv == NULL) {
1134     THROW(vmSymbols::java_lang_NullPointerException());
1135   }
1136   Handle h_recv(THREAD, recv);
1137 
1138   int number_of_parameters;
1139   Method* selected_method;
1140   {
1141     Method* m = Method::resolve_jmethod_id(method_id);
1142     number_of_parameters = m->size_of_parameters();
1143     Klass* holder = m->method_holder();
1144     if (call_type != JNI_VIRTUAL) {
1145         selected_method = m;
1146     } else if (!m->has_itable_index()) {
1147       // non-interface call -- for that little speed boost, don't handlize
1148       debug_only(NoSafepointVerifier nosafepoint;)
1149       // jni_GetMethodID makes sure class is linked and initialized
1150       // so m should have a valid vtable index.
1151       assert(m->valid_vtable_index(), "no valid vtable index");
1152       int vtbl_index = m->vtable_index();
1153       if (vtbl_index != Method::nonvirtual_vtable_index) {
1154         selected_method = h_recv->klass()->method_at_vtable(vtbl_index);
1155       } else {
1156         // final method
1157         selected_method = m;
1158       }
1159     } else {
1160       // interface call
1161       KlassHandle h_holder(THREAD, holder);
1162 
1163       int itbl_index = m->itable_index();
1164       Klass* k = h_recv->klass();
1165       selected_method = InstanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK);
1166     }
1167   }
1168 
1169   methodHandle method(THREAD, selected_method);
1170 
1171   // Create object to hold arguments for the JavaCall, and associate it with
1172   // the jni parser
1173   ResourceMark rm(THREAD);
1174   JavaCallArguments java_args(number_of_parameters);
1175   args->set_java_argument_object(&java_args);
1176 
1177   // handle arguments
1178   assert(!method->is_static(), "method should not be static");
1179   args->push_receiver(h_recv); // Push jobject handle
1180 
1181   // Fill out JavaCallArguments object
1182   args->iterate( Fingerprinter(method).fingerprint() );
1183   // Initialize result type
1184   result->set_type(args->get_ret_type());
1185 
1186   // Invoke the method. Result is returned as oop.
1187   JavaCalls::call(result, method, &java_args, CHECK);
1188 
1189   // Convert result
1190   if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1191     result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1192   }
1193 }
1194 
1195 
1196 static instanceOop alloc_object(jclass clazz, TRAPS) {
1197   KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1198   if (k == NULL) {
1199     ResourceMark rm(THREAD);
1200     THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1201   }
1202   k()->check_valid_for_instantiation(false, CHECK_NULL);
1203   InstanceKlass::cast(k())->initialize(CHECK_NULL);
1204   instanceOop ih = InstanceKlass::cast(k())->allocate_instance(THREAD);
1205   return ih;
1206 }
1207 
1208 DT_RETURN_MARK_DECL(AllocObject, jobject
1209                     , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1210 
1211 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1212   JNIWrapper("AllocObject");
1213 
1214   HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1215 
1216   jobject ret = NULL;
1217   DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1218 
1219   instanceOop i = alloc_object(clazz, CHECK_NULL);
1220   ret = JNIHandles::make_local(env, i);
1221   return ret;
1222 JNI_END
1223 
1224 DT_RETURN_MARK_DECL(NewObjectA, jobject
1225                     , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1226 
1227 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1228   JNIWrapper("NewObjectA");
1229 
1230   HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1231 
1232   jobject obj = NULL;
1233   DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1234 
1235   instanceOop i = alloc_object(clazz, CHECK_NULL);
1236   obj = JNIHandles::make_local(env, i);
1237   JavaValue jvalue(T_VOID);
1238   JNI_ArgumentPusherArray ap(methodID, args);
1239   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1240   return obj;
1241 JNI_END
1242 
1243 
1244 DT_RETURN_MARK_DECL(NewObjectV, jobject
1245                     , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1246 
1247 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1248   JNIWrapper("NewObjectV");
1249 
1250   HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1251 
1252   jobject obj = NULL;
1253   DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1254 
1255   instanceOop i = alloc_object(clazz, CHECK_NULL);
1256   obj = JNIHandles::make_local(env, i);
1257   JavaValue jvalue(T_VOID);
1258   JNI_ArgumentPusherVaArg ap(methodID, args);
1259   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1260   return obj;
1261 JNI_END
1262 
1263 
1264 DT_RETURN_MARK_DECL(NewObject, jobject
1265                     , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1266 
1267 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1268   JNIWrapper("NewObject");
1269 
1270   HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1271 
1272   jobject obj = NULL;
1273   DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1274 
1275   instanceOop i = alloc_object(clazz, CHECK_NULL);
1276   obj = JNIHandles::make_local(env, i);
1277   va_list args;
1278   va_start(args, methodID);
1279   JavaValue jvalue(T_VOID);
1280   JNI_ArgumentPusherVaArg ap(methodID, args);
1281   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1282   va_end(args);
1283   return obj;
1284 JNI_END
1285 
1286 
1287 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1288   JNIWrapper("GetObjectClass");
1289 
1290   HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1291 
1292   Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1293   jclass ret =
1294     (jclass) JNIHandles::make_local(env, k->java_mirror());
1295 
1296   HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1297   return ret;
1298 JNI_END
1299 
1300 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1301   JNIWrapper("IsInstanceOf");
1302 
1303   HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1304 
1305   jboolean ret = JNI_TRUE;
1306   if (obj != NULL) {
1307     ret = JNI_FALSE;
1308     Klass* k = java_lang_Class::as_Klass(
1309       JNIHandles::resolve_non_null(clazz));
1310     if (k != NULL) {
1311       ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1312     }
1313   }
1314 
1315   HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1316   return ret;
1317 JNI_END
1318 
1319 
1320 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1321                                const char *sig, bool is_static, TRAPS) {
1322   // %%%% This code should probably just call into a method in the LinkResolver
1323   //
1324   // The class should have been loaded (we have an instance of the class
1325   // passed in) so the method and signature should already be in the symbol
1326   // table.  If they're not there, the method doesn't exist.
1327   const char *name_to_probe = (name_str == NULL)
1328                         ? vmSymbols::object_initializer_name()->as_C_string()
1329                         : name_str;
1330   TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1331   TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1332 
1333   if (name == NULL || signature == NULL) {
1334     THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1335   }
1336 
1337   // Throw a NoSuchMethodError exception if we have an instance of a
1338   // primitive java.lang.Class
1339   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1340     THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1341   }
1342 
1343   KlassHandle klass(THREAD,
1344                java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1345 
1346   // Make sure class is linked and initialized before handing id's out to
1347   // Method*s.
1348   klass()->initialize(CHECK_NULL);
1349 
1350   Method* m;
1351   if (name == vmSymbols::object_initializer_name() ||
1352       name == vmSymbols::class_initializer_name()) {
1353     // Never search superclasses for constructors
1354     if (klass->is_instance_klass()) {
1355       m = InstanceKlass::cast(klass())->find_method(name, signature);
1356     } else {
1357       m = NULL;
1358     }
1359   } else {
1360     m = klass->lookup_method(name, signature);
1361     if (m == NULL &&  klass->is_instance_klass()) {
1362       m = InstanceKlass::cast(klass())->lookup_method_in_ordered_interfaces(name, signature);
1363     }
1364   }
1365   if (m == NULL || (m->is_static() != is_static)) {
1366     THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1367   }
1368   return m->jmethod_id();
1369 }
1370 
1371 
1372 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1373           const char *name, const char *sig))
1374   JNIWrapper("GetMethodID");
1375   HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1376   jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1377   HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1378   return ret;
1379 JNI_END
1380 
1381 
1382 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1383           const char *name, const char *sig))
1384   JNIWrapper("GetStaticMethodID");
1385   HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1386   jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1387   HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1388   return ret;
1389 JNI_END
1390 
1391 
1392 
1393 //
1394 // Calling Methods
1395 //
1396 
1397 
1398 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1399                           , EntryProbe, ReturnProbe)    \
1400 \
1401   DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1402                           , ReturnProbe);                          \
1403 \
1404 JNI_ENTRY(ResultType, \
1405           jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1406   JNIWrapper("Call" XSTR(Result) "Method"); \
1407 \
1408   EntryProbe; \
1409   ResultType ret = 0;\
1410   DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1411                      (const ResultType&)ret);\
1412 \
1413   va_list args; \
1414   va_start(args, methodID); \
1415   JavaValue jvalue(Tag); \
1416   JNI_ArgumentPusherVaArg ap(methodID, args); \
1417   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1418   va_end(args); \
1419   ret = jvalue.get_##ResultType(); \
1420   return ret;\
1421 JNI_END
1422 
1423 // the runtime type of subword integral basic types is integer
1424 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1425                   , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1426                   HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1427 DEFINE_CALLMETHOD(jbyte,    Byte,    T_BYTE
1428                   , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1429                   HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1430 DEFINE_CALLMETHOD(jchar,    Char,    T_CHAR
1431                   , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1432                   HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1433 DEFINE_CALLMETHOD(jshort,   Short,   T_SHORT
1434                   , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1435                   HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1436 
1437 DEFINE_CALLMETHOD(jobject,  Object,  T_OBJECT
1438                   , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1439                   HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1440 DEFINE_CALLMETHOD(jint,     Int,     T_INT,
1441                   HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1442                   HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1443 DEFINE_CALLMETHOD(jlong,    Long,    T_LONG
1444                   , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1445                   HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1446 // Float and double probes don't return value because dtrace doesn't currently support it
1447 DEFINE_CALLMETHOD(jfloat,   Float,   T_FLOAT
1448                   , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1449                   HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1450 DEFINE_CALLMETHOD(jdouble,  Double,  T_DOUBLE
1451                   , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1452                   HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1453 
1454 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1455                           , EntryProbe, ReturnProbe)    \
1456 \
1457   DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1458                           , ReturnProbe);                          \
1459 \
1460 JNI_ENTRY(ResultType, \
1461           jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1462   JNIWrapper("Call" XSTR(Result) "MethodV"); \
1463 \
1464   EntryProbe;\
1465   ResultType ret = 0;\
1466   DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1467                      (const ResultType&)ret);\
1468 \
1469   JavaValue jvalue(Tag); \
1470   JNI_ArgumentPusherVaArg ap(methodID, args); \
1471   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1472   ret = jvalue.get_##ResultType(); \
1473   return ret;\
1474 JNI_END
1475 
1476 // the runtime type of subword integral basic types is integer
1477 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1478                   , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1479                   HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1480 DEFINE_CALLMETHODV(jbyte,    Byte,    T_BYTE
1481                   , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1482                   HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1483 DEFINE_CALLMETHODV(jchar,    Char,    T_CHAR
1484                   , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1485                   HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1486 DEFINE_CALLMETHODV(jshort,   Short,   T_SHORT
1487                   , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1488                   HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1489 
1490 DEFINE_CALLMETHODV(jobject,  Object,  T_OBJECT
1491                   , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1492                   HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1493 DEFINE_CALLMETHODV(jint,     Int,     T_INT,
1494                   HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1495                   HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1496 DEFINE_CALLMETHODV(jlong,    Long,    T_LONG
1497                   , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1498                   HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1499 // Float and double probes don't return value because dtrace doesn't currently support it
1500 DEFINE_CALLMETHODV(jfloat,   Float,   T_FLOAT
1501                   , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1502                   HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1503 DEFINE_CALLMETHODV(jdouble,  Double,  T_DOUBLE
1504                   , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1505                   HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1506 
1507 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1508                           , EntryProbe, ReturnProbe)    \
1509 \
1510   DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1511                           , ReturnProbe);                          \
1512 \
1513 JNI_ENTRY(ResultType, \
1514           jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1515   JNIWrapper("Call" XSTR(Result) "MethodA"); \
1516   EntryProbe; \
1517   ResultType ret = 0;\
1518   DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1519                      (const ResultType&)ret);\
1520 \
1521   JavaValue jvalue(Tag); \
1522   JNI_ArgumentPusherArray ap(methodID, args); \
1523   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1524   ret = jvalue.get_##ResultType(); \
1525   return ret;\
1526 JNI_END
1527 
1528 // the runtime type of subword integral basic types is integer
1529 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1530                   , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1531                   HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1532 DEFINE_CALLMETHODA(jbyte,    Byte,    T_BYTE
1533                   , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1534                   HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1535 DEFINE_CALLMETHODA(jchar,    Char,    T_CHAR
1536                   , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1537                   HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1538 DEFINE_CALLMETHODA(jshort,   Short,   T_SHORT
1539                   , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1540                   HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1541 
1542 DEFINE_CALLMETHODA(jobject,  Object,  T_OBJECT
1543                   , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1544                   HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1545 DEFINE_CALLMETHODA(jint,     Int,     T_INT,
1546                   HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1547                   HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1548 DEFINE_CALLMETHODA(jlong,    Long,    T_LONG
1549                   , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1550                   HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1551 // Float and double probes don't return value because dtrace doesn't currently support it
1552 DEFINE_CALLMETHODA(jfloat,   Float,   T_FLOAT
1553                   , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1554                   HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1555 DEFINE_CALLMETHODA(jdouble,  Double,  T_DOUBLE
1556                   , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1557                   HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1558 
1559 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1560 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1561 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1562 
1563 
1564 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1565   JNIWrapper("CallVoidMethod");
1566   HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1567   DT_VOID_RETURN_MARK(CallVoidMethod);
1568 
1569   va_list args;
1570   va_start(args, methodID);
1571   JavaValue jvalue(T_VOID);
1572   JNI_ArgumentPusherVaArg ap(methodID, args);
1573   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1574   va_end(args);
1575 JNI_END
1576 
1577 
1578 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1579   JNIWrapper("CallVoidMethodV");
1580   HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1581   DT_VOID_RETURN_MARK(CallVoidMethodV);
1582 
1583   JavaValue jvalue(T_VOID);
1584   JNI_ArgumentPusherVaArg ap(methodID, args);
1585   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1586 JNI_END
1587 
1588 
1589 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1590   JNIWrapper("CallVoidMethodA");
1591   HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1592   DT_VOID_RETURN_MARK(CallVoidMethodA);
1593 
1594   JavaValue jvalue(T_VOID);
1595   JNI_ArgumentPusherArray ap(methodID, args);
1596   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1597 JNI_END
1598 
1599 
1600 
1601 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1602                                     , EntryProbe, ReturnProbe)      \
1603 \
1604   DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1605                           , ReturnProbe);\
1606 \
1607 JNI_ENTRY(ResultType, \
1608           jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1609   JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1610 \
1611   EntryProbe;\
1612   ResultType ret;\
1613   DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1614                      (const ResultType&)ret);\
1615 \
1616   va_list args; \
1617   va_start(args, methodID); \
1618   JavaValue jvalue(Tag); \
1619   JNI_ArgumentPusherVaArg ap(methodID, args); \
1620   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1621   va_end(args); \
1622   ret = jvalue.get_##ResultType(); \
1623   return ret;\
1624 JNI_END
1625 
1626 // the runtime type of subword integral basic types is integer
1627 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1628                             , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1629                             HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1630 DEFINE_CALLNONVIRTUALMETHOD(jbyte,    Byte,    T_BYTE
1631                             , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1632                             HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1633 DEFINE_CALLNONVIRTUALMETHOD(jchar,    Char,    T_CHAR
1634                             , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1635                             HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1636 DEFINE_CALLNONVIRTUALMETHOD(jshort,   Short,   T_SHORT
1637                             , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1638                             HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1639 
1640 DEFINE_CALLNONVIRTUALMETHOD(jobject,  Object,  T_OBJECT
1641                             , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1642                             HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1643 DEFINE_CALLNONVIRTUALMETHOD(jint,     Int,     T_INT
1644                             , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1645                             HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1646 DEFINE_CALLNONVIRTUALMETHOD(jlong,    Long,    T_LONG
1647                             , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1648 // Float and double probes don't return value because dtrace doesn't currently support it
1649                             HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1650 DEFINE_CALLNONVIRTUALMETHOD(jfloat,   Float,   T_FLOAT
1651                             , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1652                             HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1653 DEFINE_CALLNONVIRTUALMETHOD(jdouble,  Double,  T_DOUBLE
1654                             , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1655                             HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1656 
1657 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1658                                     , EntryProbe, ReturnProbe)      \
1659 \
1660   DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1661                           , ReturnProbe);\
1662 \
1663 JNI_ENTRY(ResultType, \
1664           jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1665   JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1666 \
1667   EntryProbe;\
1668   ResultType ret;\
1669   DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1670                      (const ResultType&)ret);\
1671 \
1672   JavaValue jvalue(Tag); \
1673   JNI_ArgumentPusherVaArg ap(methodID, args); \
1674   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1675   ret = jvalue.get_##ResultType(); \
1676   return ret;\
1677 JNI_END
1678 
1679 // the runtime type of subword integral basic types is integer
1680 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1681                             , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1682                             HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1683 DEFINE_CALLNONVIRTUALMETHODV(jbyte,    Byte,    T_BYTE
1684                             , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1685                             HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1686 DEFINE_CALLNONVIRTUALMETHODV(jchar,    Char,    T_CHAR
1687                             , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1688                             HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1689 DEFINE_CALLNONVIRTUALMETHODV(jshort,   Short,   T_SHORT
1690                             , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1691                             HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1692 
1693 DEFINE_CALLNONVIRTUALMETHODV(jobject,  Object,  T_OBJECT
1694                             , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1695                             HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1696 DEFINE_CALLNONVIRTUALMETHODV(jint,     Int,     T_INT
1697                             , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1698                             HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1699 DEFINE_CALLNONVIRTUALMETHODV(jlong,    Long,    T_LONG
1700                             , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1701 // Float and double probes don't return value because dtrace doesn't currently support it
1702                             HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1703 DEFINE_CALLNONVIRTUALMETHODV(jfloat,   Float,   T_FLOAT
1704                             , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1705                             HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1706 DEFINE_CALLNONVIRTUALMETHODV(jdouble,  Double,  T_DOUBLE
1707                             , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1708                             HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1709 
1710 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1711                                     , EntryProbe, ReturnProbe)      \
1712 \
1713   DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1714                           , ReturnProbe);\
1715 \
1716 JNI_ENTRY(ResultType, \
1717           jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1718   JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1719 \
1720   EntryProbe;\
1721   ResultType ret;\
1722   DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1723                      (const ResultType&)ret);\
1724 \
1725   JavaValue jvalue(Tag); \
1726   JNI_ArgumentPusherArray ap(methodID, args); \
1727   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1728   ret = jvalue.get_##ResultType(); \
1729   return ret;\
1730 JNI_END
1731 
1732 // the runtime type of subword integral basic types is integer
1733 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1734                             , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1735                             HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1736 DEFINE_CALLNONVIRTUALMETHODA(jbyte,    Byte,    T_BYTE
1737                             , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1738                             HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1739 DEFINE_CALLNONVIRTUALMETHODA(jchar,    Char,    T_CHAR
1740                             , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1741                             HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1742 DEFINE_CALLNONVIRTUALMETHODA(jshort,   Short,   T_SHORT
1743                             , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1744                             HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1745 
1746 DEFINE_CALLNONVIRTUALMETHODA(jobject,  Object,  T_OBJECT
1747                             , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1748                             HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1749 DEFINE_CALLNONVIRTUALMETHODA(jint,     Int,     T_INT
1750                             , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1751                             HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1752 DEFINE_CALLNONVIRTUALMETHODA(jlong,    Long,    T_LONG
1753                             , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1754 // Float and double probes don't return value because dtrace doesn't currently support it
1755                             HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1756 DEFINE_CALLNONVIRTUALMETHODA(jfloat,   Float,   T_FLOAT
1757                             , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1758                             HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1759 DEFINE_CALLNONVIRTUALMETHODA(jdouble,  Double,  T_DOUBLE
1760                             , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1761                             HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1762 
1763 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1764                          , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1765 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1766                          , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1767 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1768                          , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1769 
1770 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1771   JNIWrapper("CallNonvirtualVoidMethod");
1772 
1773   HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1774   DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1775 
1776   va_list args;
1777   va_start(args, methodID);
1778   JavaValue jvalue(T_VOID);
1779   JNI_ArgumentPusherVaArg ap(methodID, args);
1780   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1781   va_end(args);
1782 JNI_END
1783 
1784 
1785 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1786   JNIWrapper("CallNonvirtualVoidMethodV");
1787 
1788   HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1789                env, obj, cls, (uintptr_t) methodID);
1790   DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1791 
1792   JavaValue jvalue(T_VOID);
1793   JNI_ArgumentPusherVaArg ap(methodID, args);
1794   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1795 JNI_END
1796 
1797 
1798 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1799   JNIWrapper("CallNonvirtualVoidMethodA");
1800   HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1801                 env, obj, cls, (uintptr_t) methodID);
1802   DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1803   JavaValue jvalue(T_VOID);
1804   JNI_ArgumentPusherArray ap(methodID, args);
1805   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1806 JNI_END
1807 
1808 
1809 
1810 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1811                                 , EntryProbe, ResultProbe) \
1812 \
1813   DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1814                           , ResultProbe);                               \
1815 \
1816 JNI_ENTRY(ResultType, \
1817           jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1818   JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1819 \
1820   EntryProbe; \
1821   ResultType ret = 0;\
1822   DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1823                      (const ResultType&)ret);\
1824 \
1825   va_list args; \
1826   va_start(args, methodID); \
1827   JavaValue jvalue(Tag); \
1828   JNI_ArgumentPusherVaArg ap(methodID, args); \
1829   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1830   va_end(args); \
1831   ret = jvalue.get_##ResultType(); \
1832   return ret;\
1833 JNI_END
1834 
1835 // the runtime type of subword integral basic types is integer
1836 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1837                         , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1838                         HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1839 DEFINE_CALLSTATICMETHOD(jbyte,    Byte,    T_BYTE
1840                         , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1841                         HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1842 DEFINE_CALLSTATICMETHOD(jchar,    Char,    T_CHAR
1843                         , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1844                         HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1845 DEFINE_CALLSTATICMETHOD(jshort,   Short,   T_SHORT
1846                         , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1847                         HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1848 
1849 DEFINE_CALLSTATICMETHOD(jobject,  Object,  T_OBJECT
1850                         , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1851                         HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1852 DEFINE_CALLSTATICMETHOD(jint,     Int,     T_INT
1853                         , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1854                         HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1855 DEFINE_CALLSTATICMETHOD(jlong,    Long,    T_LONG
1856                         , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1857                         HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1858 // Float and double probes don't return value because dtrace doesn't currently support it
1859 DEFINE_CALLSTATICMETHOD(jfloat,   Float,   T_FLOAT
1860                         , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1861                         HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1862 DEFINE_CALLSTATICMETHOD(jdouble,  Double,  T_DOUBLE
1863                         , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1864                         HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1865 
1866 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1867                                 , EntryProbe, ResultProbe) \
1868 \
1869   DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1870                           , ResultProbe);                               \
1871 \
1872 JNI_ENTRY(ResultType, \
1873           jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1874   JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1875 \
1876   EntryProbe; \
1877   ResultType ret = 0;\
1878   DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1879                      (const ResultType&)ret);\
1880 \
1881   JavaValue jvalue(Tag); \
1882   JNI_ArgumentPusherVaArg ap(methodID, args); \
1883   /* Make sure class is initialized before trying to invoke its method */ \
1884   KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls))); \
1885   k()->initialize(CHECK_0); \
1886   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1887   va_end(args); \
1888   ret = jvalue.get_##ResultType(); \
1889   return ret;\
1890 JNI_END
1891 
1892 // the runtime type of subword integral basic types is integer
1893 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1894                         , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1895                         HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1896 DEFINE_CALLSTATICMETHODV(jbyte,    Byte,    T_BYTE
1897                         , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1898                         HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1899 DEFINE_CALLSTATICMETHODV(jchar,    Char,    T_CHAR
1900                         , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1901                         HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1902 DEFINE_CALLSTATICMETHODV(jshort,   Short,   T_SHORT
1903                         , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1904                         HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1905 
1906 DEFINE_CALLSTATICMETHODV(jobject,  Object,  T_OBJECT
1907                         , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1908                         HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1909 DEFINE_CALLSTATICMETHODV(jint,     Int,     T_INT
1910                         , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1911                         HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1912 DEFINE_CALLSTATICMETHODV(jlong,    Long,    T_LONG
1913                         , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1914                         HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1915 // Float and double probes don't return value because dtrace doesn't currently support it
1916 DEFINE_CALLSTATICMETHODV(jfloat,   Float,   T_FLOAT
1917                         , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1918                         HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1919 DEFINE_CALLSTATICMETHODV(jdouble,  Double,  T_DOUBLE
1920                         , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1921                         HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1922 
1923 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1924                                 , EntryProbe, ResultProbe) \
1925 \
1926   DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1927                           , ResultProbe);                               \
1928 \
1929 JNI_ENTRY(ResultType, \
1930           jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1931   JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1932 \
1933   EntryProbe; \
1934   ResultType ret = 0;\
1935   DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1936                      (const ResultType&)ret);\
1937 \
1938   JavaValue jvalue(Tag); \
1939   JNI_ArgumentPusherArray ap(methodID, args); \
1940   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1941   ret = jvalue.get_##ResultType(); \
1942   return ret;\
1943 JNI_END
1944 
1945 // the runtime type of subword integral basic types is integer
1946 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1947                         , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1948                         HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1949 DEFINE_CALLSTATICMETHODA(jbyte,    Byte,    T_BYTE
1950                         , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1951                         HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1952 DEFINE_CALLSTATICMETHODA(jchar,    Char,    T_CHAR
1953                         , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1954                         HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1955 DEFINE_CALLSTATICMETHODA(jshort,   Short,   T_SHORT
1956                         , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1957                         HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1958 
1959 DEFINE_CALLSTATICMETHODA(jobject,  Object,  T_OBJECT
1960                         , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1961                         HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1962 DEFINE_CALLSTATICMETHODA(jint,     Int,     T_INT
1963                         , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1964                         HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1965 DEFINE_CALLSTATICMETHODA(jlong,    Long,    T_LONG
1966                         , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1967                         HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1968 // Float and double probes don't return value because dtrace doesn't currently support it
1969 DEFINE_CALLSTATICMETHODA(jfloat,   Float,   T_FLOAT
1970                         , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1971                         HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1972 DEFINE_CALLSTATICMETHODA(jdouble,  Double,  T_DOUBLE
1973                         , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1974                         HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1975 
1976 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1977                          , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1978 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1979                          , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1980 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1981                          , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1982 
1983 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1984   JNIWrapper("CallStaticVoidMethod");
1985   HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1986   DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1987 
1988   va_list args;
1989   va_start(args, methodID);
1990   JavaValue jvalue(T_VOID);
1991   JNI_ArgumentPusherVaArg ap(methodID, args);
1992   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1993   va_end(args);
1994 JNI_END
1995 
1996 
1997 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1998   JNIWrapper("CallStaticVoidMethodV");
1999   HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
2000   DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
2001 
2002   JavaValue jvalue(T_VOID);
2003   JNI_ArgumentPusherVaArg ap(methodID, args);
2004   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2005 JNI_END
2006 
2007 
2008 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
2009   JNIWrapper("CallStaticVoidMethodA");
2010   HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
2011   DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
2012 
2013   JavaValue jvalue(T_VOID);
2014   JNI_ArgumentPusherArray ap(methodID, args);
2015   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2016 JNI_END
2017 
2018 
2019 //
2020 // Accessing Fields
2021 //
2022 
2023 
2024 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2025                     , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2026 
2027 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2028           const char *name, const char *sig))
2029   JNIWrapper("GetFieldID");
2030   HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2031   jfieldID ret = 0;
2032   DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2033 
2034   // The class should have been loaded (we have an instance of the class
2035   // passed in) so the field and signature should already be in the symbol
2036   // table.  If they're not there, the field doesn't exist.
2037   TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2038   TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2039   if (fieldname == NULL || signame == NULL) {
2040     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2041   }
2042   KlassHandle k(THREAD,
2043                 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2044   // Make sure class is initialized before handing id's out to fields
2045   k()->initialize(CHECK_NULL);
2046 
2047   fieldDescriptor fd;
2048   if (!k()->is_instance_klass() ||
2049       !InstanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) {
2050     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2051   }
2052 
2053   // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2054   // It may also have hash bits for k, if VerifyJNIFields is turned on.
2055   ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset());
2056   return ret;
2057 JNI_END
2058 
2059 
2060 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2061   JNIWrapper("GetObjectField");
2062   HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2063   oop o = JNIHandles::resolve_non_null(obj);
2064   Klass* k = o->klass();
2065   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2066   // Keep JVMTI addition small and only check enabled flag here.
2067   // jni_GetField_probe() assumes that is okay to create handles.
2068   if (JvmtiExport::should_post_field_access()) {
2069     o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2070   }
2071   jobject ret = JNIHandles::make_local(env, o->obj_field(offset));
2072 #if INCLUDE_ALL_GCS
2073   // If G1 is enabled and we are accessing the value of the referent
2074   // field in a reference object then we need to register a non-null
2075   // referent with the SATB barrier.
2076   if (UseG1GC) {
2077     bool needs_barrier = false;
2078 
2079     if (ret != NULL &&
2080         offset == java_lang_ref_Reference::referent_offset &&
2081         InstanceKlass::cast(k)->reference_type() != REF_NONE) {
2082       assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
2083       needs_barrier = true;
2084     }
2085 
2086     if (needs_barrier) {
2087       oop referent = JNIHandles::resolve(ret);
2088       G1SATBCardTableModRefBS::enqueue(referent);
2089     }
2090   }
2091 #endif // INCLUDE_ALL_GCS
2092 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2093   return ret;
2094 JNI_END
2095 
2096 
2097 
2098 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2099   , EntryProbe, ReturnProbe) \
2100 \
2101   DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2102   , ReturnProbe); \
2103 \
2104 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2105   JNIWrapper("Get" XSTR(Result) "Field"); \
2106 \
2107   EntryProbe; \
2108   Return ret = 0;\
2109   DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2110 \
2111   oop o = JNIHandles::resolve_non_null(obj); \
2112   Klass* k = o->klass(); \
2113   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);  \
2114   /* Keep JVMTI addition small and only check enabled flag here.       */ \
2115   /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2116   /* and creates a ResetNoHandleMark.                                   */ \
2117   if (JvmtiExport::should_post_field_access()) { \
2118     o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2119   } \
2120   ret = o->Fieldname##_field(offset); \
2121   return ret; \
2122 JNI_END
2123 
2124 DEFINE_GETFIELD(jboolean, bool,   Boolean
2125                 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2126                 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2127 DEFINE_GETFIELD(jbyte,    byte,   Byte
2128                 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2129                 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2130 DEFINE_GETFIELD(jchar,    char,   Char
2131                 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2132                 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2133 DEFINE_GETFIELD(jshort,   short,  Short
2134                 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2135                 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2136 DEFINE_GETFIELD(jint,     int,    Int
2137                 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2138                 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2139 DEFINE_GETFIELD(jlong,    long,   Long
2140                 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2141                 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2142 // Float and double probes don't return value because dtrace doesn't currently support it
2143 DEFINE_GETFIELD(jfloat,   float,  Float
2144                 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2145                 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2146 DEFINE_GETFIELD(jdouble,  double, Double
2147                 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2148                 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2149 
2150 address jni_GetBooleanField_addr() {
2151   return (address)jni_GetBooleanField;
2152 }
2153 address jni_GetByteField_addr() {
2154   return (address)jni_GetByteField;
2155 }
2156 address jni_GetCharField_addr() {
2157   return (address)jni_GetCharField;
2158 }
2159 address jni_GetShortField_addr() {
2160   return (address)jni_GetShortField;
2161 }
2162 address jni_GetIntField_addr() {
2163   return (address)jni_GetIntField;
2164 }
2165 address jni_GetLongField_addr() {
2166   return (address)jni_GetLongField;
2167 }
2168 address jni_GetFloatField_addr() {
2169   return (address)jni_GetFloatField;
2170 }
2171 address jni_GetDoubleField_addr() {
2172   return (address)jni_GetDoubleField;
2173 }
2174 
2175 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2176   JNIWrapper("SetObjectField");
2177   HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2178   oop o = JNIHandles::resolve_non_null(obj);
2179   Klass* k = o->klass();
2180   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2181   // Keep JVMTI addition small and only check enabled flag here.
2182   // jni_SetField_probe_nh() assumes that is not okay to create handles
2183   // and creates a ResetNoHandleMark.
2184   if (JvmtiExport::should_post_field_modification()) {
2185     jvalue field_value;
2186     field_value.l = value;
2187     o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2188   }
2189   o->obj_field_put(offset, JNIHandles::resolve(value));
2190   HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2191 JNI_END
2192 
2193 
2194 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2195                         , EntryProbe, ReturnProbe) \
2196 \
2197 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2198   JNIWrapper("Set" XSTR(Result) "Field"); \
2199 \
2200   EntryProbe; \
2201 \
2202   oop o = JNIHandles::resolve_non_null(obj); \
2203   Klass* k = o->klass(); \
2204   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);  \
2205   /* Keep JVMTI addition small and only check enabled flag here.       */ \
2206   /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2207   /* and creates a ResetNoHandleMark.                                   */ \
2208   if (JvmtiExport::should_post_field_modification()) { \
2209     jvalue field_value; \
2210     field_value.unionType = value; \
2211     o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2212   } \
2213   if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2214   o->Fieldname##_field_put(offset, value); \
2215   ReturnProbe; \
2216 JNI_END
2217 
2218 DEFINE_SETFIELD(jboolean, bool,   Boolean, 'Z', z
2219                 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2220                 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2221 DEFINE_SETFIELD(jbyte,    byte,   Byte,    'B', b
2222                 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2223                 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2224 DEFINE_SETFIELD(jchar,    char,   Char,    'C', c
2225                 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2226                 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2227 DEFINE_SETFIELD(jshort,   short,  Short,   'S', s
2228                 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2229                 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2230 DEFINE_SETFIELD(jint,     int,    Int,     'I', i
2231                 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2232                 HOTSPOT_JNI_SETINTFIELD_RETURN())
2233 DEFINE_SETFIELD(jlong,    long,   Long,    'J', j
2234                 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2235                 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2236 // Float and double probes don't return value because dtrace doesn't currently support it
2237 DEFINE_SETFIELD(jfloat,   float,  Float,   'F', f
2238                 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2239                 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2240 DEFINE_SETFIELD(jdouble,  double, Double,  'D', d
2241                 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2242                 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2243 
2244 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2245                     , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2246 
2247 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2248   JNIWrapper("ToReflectedField");
2249   HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2250   jobject ret = NULL;
2251   DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2252 
2253   fieldDescriptor fd;
2254   bool found = false;
2255   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2256 
2257   assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2258 
2259   if (isStatic) {
2260     // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2261     JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2262     assert(id->is_static_field_id(), "invalid static field id");
2263     found = id->find_local_field(&fd);
2264   } else {
2265     // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2266     int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2267     found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2268   }
2269   assert(found, "bad fieldID passed into jni_ToReflectedField");
2270   oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2271   ret = JNIHandles::make_local(env, reflected);
2272   return ret;
2273 JNI_END
2274 
2275 
2276 //
2277 // Accessing Static Fields
2278 //
2279 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2280                     , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2281 
2282 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2283           const char *name, const char *sig))
2284   JNIWrapper("GetStaticFieldID");
2285   HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2286   jfieldID ret = NULL;
2287   DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2288 
2289   // The class should have been loaded (we have an instance of the class
2290   // passed in) so the field and signature should already be in the symbol
2291   // table.  If they're not there, the field doesn't exist.
2292   TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2293   TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2294   if (fieldname == NULL || signame == NULL) {
2295     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2296   }
2297   KlassHandle k(THREAD,
2298                 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2299   // Make sure class is initialized before handing id's out to static fields
2300   k()->initialize(CHECK_NULL);
2301 
2302   fieldDescriptor fd;
2303   if (!k()->is_instance_klass() ||
2304       !InstanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) {
2305     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2306   }
2307 
2308   // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2309   JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2310   debug_only(id->set_is_static_field_id();)
2311 
2312   debug_only(id->verify(fd.field_holder()));
2313 
2314   ret = jfieldIDWorkaround::to_static_jfieldID(id);
2315   return ret;
2316 JNI_END
2317 
2318 
2319 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2320   JNIWrapper("GetStaticObjectField");
2321   HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2322 #if INCLUDE_JNI_CHECK
2323   DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2324 #endif // INCLUDE_JNI_CHECK
2325   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2326   assert(id->is_static_field_id(), "invalid static field id");
2327   // Keep JVMTI addition small and only check enabled flag here.
2328   // jni_GetField_probe() assumes that is okay to create handles.
2329   if (JvmtiExport::should_post_field_access()) {
2330     JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2331   }
2332   jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2333   HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2334   return ret;
2335 JNI_END
2336 
2337 
2338 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2339                               , EntryProbe, ReturnProbe) \
2340 \
2341   DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2342                           , ReturnProbe);                                          \
2343 \
2344 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2345   JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2346   EntryProbe; \
2347   Return ret = 0;\
2348   DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2349                      (const Return&)ret);\
2350   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2351   assert(id->is_static_field_id(), "invalid static field id"); \
2352   /* Keep JVMTI addition small and only check enabled flag here. */ \
2353   /* jni_GetField_probe() assumes that is okay to create handles. */ \
2354   if (JvmtiExport::should_post_field_access()) { \
2355     JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2356   } \
2357   ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2358   return ret;\
2359 JNI_END
2360 
2361 DEFINE_GETSTATICFIELD(jboolean, bool,   Boolean
2362                       , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2363 DEFINE_GETSTATICFIELD(jbyte,    byte,   Byte
2364                       , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),    HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref)   )
2365 DEFINE_GETSTATICFIELD(jchar,    char,   Char
2366                       , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),    HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref)   )
2367 DEFINE_GETSTATICFIELD(jshort,   short,  Short
2368                       , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),   HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref)  )
2369 DEFINE_GETSTATICFIELD(jint,     int,    Int
2370                       , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),     HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref)    )
2371 DEFINE_GETSTATICFIELD(jlong,    long,   Long
2372                       , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),    HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref)   )
2373 // Float and double probes don't return value because dtrace doesn't currently support it
2374 DEFINE_GETSTATICFIELD(jfloat,   float,  Float
2375                       , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),   HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN()          )
2376 DEFINE_GETSTATICFIELD(jdouble,  double, Double
2377                       , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),  HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN()         )
2378 
2379 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2380   JNIWrapper("SetStaticObjectField");
2381  HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2382   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2383   assert(id->is_static_field_id(), "invalid static field id");
2384   // Keep JVMTI addition small and only check enabled flag here.
2385   // jni_SetField_probe() assumes that is okay to create handles.
2386   if (JvmtiExport::should_post_field_modification()) {
2387     jvalue field_value;
2388     field_value.l = value;
2389     JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2390   }
2391   id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2392   HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2393 JNI_END
2394 
2395 
2396 
2397 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2398                               , EntryProbe, ReturnProbe) \
2399 \
2400 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2401   JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2402   EntryProbe; \
2403 \
2404   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2405   assert(id->is_static_field_id(), "invalid static field id"); \
2406   /* Keep JVMTI addition small and only check enabled flag here. */ \
2407   /* jni_SetField_probe() assumes that is okay to create handles. */ \
2408   if (JvmtiExport::should_post_field_modification()) { \
2409     jvalue field_value; \
2410     field_value.unionType = value; \
2411     JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2412   } \
2413   if (SigType == 'Z') { value = ((jboolean)value) & 1; } \
2414   id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2415   ReturnProbe;\
2416 JNI_END
2417 
2418 DEFINE_SETSTATICFIELD(jboolean, bool,   Boolean, 'Z', z
2419                       , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2420                       HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2421 DEFINE_SETSTATICFIELD(jbyte,    byte,   Byte,    'B', b
2422                       , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2423                       HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2424 DEFINE_SETSTATICFIELD(jchar,    char,   Char,    'C', c
2425                       , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2426                       HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2427 DEFINE_SETSTATICFIELD(jshort,   short,  Short,   'S', s
2428                       , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2429                       HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2430 DEFINE_SETSTATICFIELD(jint,     int,    Int,     'I', i
2431                       , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2432                       HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2433 DEFINE_SETSTATICFIELD(jlong,    long,   Long,    'J', j
2434                       , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2435                       HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2436 // Float and double probes don't return value because dtrace doesn't currently support it
2437 DEFINE_SETSTATICFIELD(jfloat,   float,  Float,   'F', f
2438                       , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2439                       HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2440 DEFINE_SETSTATICFIELD(jdouble,  double, Double,  'D', d
2441                       , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2442                       HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2443 
2444 //
2445 // String Operations
2446 //
2447 
2448 // Unicode Interface
2449 
2450 DT_RETURN_MARK_DECL(NewString, jstring
2451                     , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2452 
2453 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2454   JNIWrapper("NewString");
2455  HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2456   jstring ret = NULL;
2457   DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2458   oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2459   ret = (jstring) JNIHandles::make_local(env, string);
2460   return ret;
2461 JNI_END
2462 
2463 
2464 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2465   JNIWrapper("GetStringLength");
2466   HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2467   jsize ret = 0;
2468   oop s = JNIHandles::resolve_non_null(string);
2469   if (java_lang_String::value(s) != NULL) {
2470     ret = java_lang_String::length(s);
2471   }
2472  HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2473   return ret;
2474 JNI_END
2475 
2476 
2477 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
2478   JNIEnv *env, jstring string, jboolean *isCopy))
2479   JNIWrapper("GetStringChars");
2480  HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2481   jchar* buf = NULL;
2482   oop s = JNIHandles::resolve_non_null(string);
2483   typeArrayOop s_value = java_lang_String::value(s);
2484   if (s_value != NULL) {
2485     int s_len = java_lang_String::length(s);
2486     bool is_latin1 = java_lang_String::is_latin1(s);
2487     buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal);  // add one for zero termination
2488     /* JNI Specification states return NULL on OOM */
2489     if (buf != NULL) {
2490       if (s_len > 0) {
2491         if (!is_latin1) {
2492           memcpy(buf, s_value->char_at_addr(0), sizeof(jchar)*s_len);
2493         } else {
2494           for (int i = 0; i < s_len; i++) {
2495             buf[i] = ((jchar) s_value->byte_at(i)) & 0xff;
2496           }
2497         }
2498       }
2499       buf[s_len] = 0;
2500       //%note jni_5
2501       if (isCopy != NULL) {
2502         *isCopy = JNI_TRUE;
2503       }
2504     }
2505   }
2506   HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2507   return buf;
2508 JNI_END
2509 
2510 
2511 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2512   JNIWrapper("ReleaseStringChars");
2513   HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2514   //%note jni_6
2515   if (chars != NULL) {
2516     // Since String objects are supposed to be immutable, don't copy any
2517     // new data back.  A bad user will have to go after the char array.
2518     FreeHeap((void*) chars);
2519   }
2520   HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2521 JNI_END
2522 
2523 
2524 // UTF Interface
2525 
2526 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2527                     , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2528 
2529 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2530   JNIWrapper("NewStringUTF");
2531   HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2532   jstring ret;
2533   DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2534 
2535   oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2536   ret = (jstring) JNIHandles::make_local(env, result);
2537   return ret;
2538 JNI_END
2539 
2540 
2541 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2542   JNIWrapper("GetStringUTFLength");
2543  HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2544   jsize ret = 0;
2545   oop java_string = JNIHandles::resolve_non_null(string);
2546   if (java_lang_String::value(java_string) != NULL) {
2547     ret = java_lang_String::utf8_length(java_string);
2548   }
2549   HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2550   return ret;
2551 JNI_END
2552 
2553 
2554 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2555   JNIWrapper("GetStringUTFChars");
2556  HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2557   char* result = NULL;
2558   oop java_string = JNIHandles::resolve_non_null(string);
2559   if (java_lang_String::value(java_string) != NULL) {
2560     size_t length = java_lang_String::utf8_length(java_string);
2561     /* JNI Specification states return NULL on OOM */
2562     result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2563     if (result != NULL) {
2564       java_lang_String::as_utf8_string(java_string, result, (int) length + 1);
2565       if (isCopy != NULL) {
2566         *isCopy = JNI_TRUE;
2567       }
2568     }
2569   }
2570  HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2571   return result;
2572 JNI_END
2573 
2574 
2575 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2576   JNIWrapper("ReleaseStringUTFChars");
2577  HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2578   if (chars != NULL) {
2579     FreeHeap((char*) chars);
2580   }
2581 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2582 JNI_END
2583 
2584 
2585 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2586   JNIWrapper("GetArrayLength");
2587  HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2588   arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2589   assert(a->is_array(), "must be array");
2590   jsize ret = a->length();
2591  HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2592   return ret;
2593 JNI_END
2594 
2595 
2596 //
2597 // Object Array Operations
2598 //
2599 
2600 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2601                     , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2602 
2603 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2604   JNIWrapper("NewObjectArray");
2605  HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2606   jobjectArray ret = NULL;
2607   DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2608   KlassHandle ek(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)));
2609   Klass* ako = ek()->array_klass(CHECK_NULL);
2610   KlassHandle ak = KlassHandle(THREAD, ako);
2611   ObjArrayKlass::cast(ak())->initialize(CHECK_NULL);
2612   objArrayOop result = ObjArrayKlass::cast(ak())->allocate(length, CHECK_NULL);
2613   oop initial_value = JNIHandles::resolve(initialElement);
2614   if (initial_value != NULL) {  // array already initialized with NULL
2615     for (int index = 0; index < length; index++) {
2616       result->obj_at_put(index, initial_value);
2617     }
2618   }
2619   ret = (jobjectArray) JNIHandles::make_local(env, result);
2620   return ret;
2621 JNI_END
2622 
2623 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2624                     , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2625 
2626 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2627   JNIWrapper("GetObjectArrayElement");
2628  HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2629   jobject ret = NULL;
2630   DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2631   objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2632   if (a->is_within_bounds(index)) {
2633     ret = JNIHandles::make_local(env, a->obj_at(index));
2634     return ret;
2635   } else {
2636     char buf[jintAsStringSize];
2637     sprintf(buf, "%d", index);
2638     THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2639   }
2640 JNI_END
2641 
2642 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2643                          , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2644 
2645 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2646   JNIWrapper("SetObjectArrayElement");
2647  HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2648   DT_VOID_RETURN_MARK(SetObjectArrayElement);
2649 
2650   objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2651   oop v = JNIHandles::resolve(value);
2652   if (a->is_within_bounds(index)) {
2653     if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2654       a->obj_at_put(index, v);
2655     } else {
2656       THROW(vmSymbols::java_lang_ArrayStoreException());
2657     }
2658   } else {
2659     char buf[jintAsStringSize];
2660     sprintf(buf, "%d", index);
2661     THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2662   }
2663 JNI_END
2664 
2665 
2666 
2667 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2668                               ,EntryProbe,ReturnProbe)  \
2669 \
2670   DT_RETURN_MARK_DECL(New##Result##Array, Return \
2671                       , ReturnProbe); \
2672 \
2673 JNI_ENTRY(Return, \
2674           jni_New##Result##Array(JNIEnv *env, jsize len)) \
2675   JNIWrapper("New" XSTR(Result) "Array"); \
2676   EntryProbe; \
2677   Return ret = NULL;\
2678   DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2679 \
2680   oop obj= oopFactory::Allocator(len, CHECK_0); \
2681   ret = (Return) JNIHandles::make_local(env, obj); \
2682   return ret;\
2683 JNI_END
2684 
2685 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray,   Boolean,
2686                       HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2687                       HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2688 DEFINE_NEWSCALARARRAY(jbyteArray,    new_byteArray,   Byte,
2689                       HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2690                       HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2691 DEFINE_NEWSCALARARRAY(jshortArray,   new_shortArray,  Short,
2692                       HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2693                       HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2694 DEFINE_NEWSCALARARRAY(jcharArray,    new_charArray,   Char,
2695                       HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2696                       HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2697 DEFINE_NEWSCALARARRAY(jintArray,     new_intArray,    Int,
2698                       HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2699                       HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2700 DEFINE_NEWSCALARARRAY(jlongArray,    new_longArray,   Long,
2701                       HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2702                       HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2703 DEFINE_NEWSCALARARRAY(jfloatArray,   new_singleArray, Float,
2704                       HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2705                       HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2706 DEFINE_NEWSCALARARRAY(jdoubleArray,  new_doubleArray, Double,
2707                       HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2708                       HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2709 
2710 // Return an address which will fault if the caller writes to it.
2711 
2712 static char* get_bad_address() {
2713   static char* bad_address = NULL;
2714   if (bad_address == NULL) {
2715     size_t size = os::vm_allocation_granularity();
2716     bad_address = os::reserve_memory(size);
2717     if (bad_address != NULL) {
2718       os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2719                          /*is_committed*/false);
2720       MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2721     }
2722   }
2723   return bad_address;
2724 }
2725 
2726 
2727 
2728 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2729                                       , EntryProbe, ReturnProbe) \
2730 \
2731 JNI_QUICK_ENTRY(ElementType*, \
2732           jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2733   JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2734   EntryProbe; \
2735   /* allocate an chunk of memory in c land */ \
2736   typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2737   ElementType* result; \
2738   int len = a->length(); \
2739   if (len == 0) { \
2740     /* Empty array: legal but useless, can't return NULL. \
2741      * Return a pointer to something useless. \
2742      * Avoid asserts in typeArrayOop. */ \
2743     result = (ElementType*)get_bad_address(); \
2744   } else { \
2745     /* JNI Specification states return NULL on OOM */                    \
2746     result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2747     if (result != NULL) {                                                \
2748       /* copy the array to the c chunk */                                \
2749       memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len);      \
2750       if (isCopy) {                                                      \
2751         *isCopy = JNI_TRUE;                                              \
2752       }                                                                  \
2753     }                                                                    \
2754   } \
2755   ReturnProbe; \
2756   return result; \
2757 JNI_END
2758 
2759 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2760                               , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2761                               HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2762 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE,    jbyte,    Byte,    byte
2763                               , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2764                               HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2765 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT,   jshort,   Short,   short
2766                               , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2767                               HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2768 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR,    jchar,    Char,    char
2769                               , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2770                               HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2771 DEFINE_GETSCALARARRAYELEMENTS(T_INT,     jint,     Int,     int
2772                               , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2773                               HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2774 DEFINE_GETSCALARARRAYELEMENTS(T_LONG,    jlong,    Long,    long
2775                               , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2776                               HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2777 // Float and double probes don't return value because dtrace doesn't currently support it
2778 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT,   jfloat,   Float,   float
2779                               , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2780                               HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2781 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE,  jdouble,  Double,  double
2782                               , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2783                               HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2784 
2785 
2786 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2787                                           , EntryProbe, ReturnProbe);\
2788 \
2789 JNI_QUICK_ENTRY(void, \
2790           jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2791                                              ElementType *buf, jint mode)) \
2792   JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2793   EntryProbe; \
2794   typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2795   int len = a->length(); \
2796   if (len != 0) {   /* Empty array:  nothing to free or copy. */  \
2797     if ((mode == 0) || (mode == JNI_COMMIT)) { \
2798       memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \
2799     } \
2800     if ((mode == 0) || (mode == JNI_ABORT)) { \
2801       FreeHeap(buf); \
2802     } \
2803   } \
2804   ReturnProbe; \
2805 JNI_END
2806 
2807 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2808                                   , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2809                                   HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2810 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE,    jbyte,    Byte,    byte
2811                                   , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2812                                   HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2813 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT,   jshort,   Short,   short
2814                                   ,  HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2815                                   HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2816 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR,    jchar,    Char,    char
2817                                   ,  HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2818                                   HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2819 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT,     jint,     Int,     int
2820                                   , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2821                                   HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2822 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG,    jlong,    Long,    long
2823                                   , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2824                                   HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2825 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT,   jfloat,   Float,   float
2826                                   , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2827                                   HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2828 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE,  jdouble,  Double,  double
2829                                   , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2830                                   HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2831 
2832 
2833 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2834                                     , EntryProbe, ReturnProbe); \
2835   DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2836                            , ReturnProbe); \
2837 \
2838 JNI_ENTRY(void, \
2839 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2840              jsize len, ElementType *buf)) \
2841   JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2842   EntryProbe; \
2843   DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2844   typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2845   if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \
2846     THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2847   } else { \
2848     if (len > 0) { \
2849       int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \
2850       memcpy((u_char*) buf, \
2851              (u_char*) src->Tag##_at_addr(start), \
2852              len << sc);                          \
2853     } \
2854   } \
2855 JNI_END
2856 
2857 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2858                             , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2859                             HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2860 DEFINE_GETSCALARARRAYREGION(T_BYTE,    jbyte,   Byte,    byte
2861                             ,  HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2862                             HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2863 DEFINE_GETSCALARARRAYREGION(T_SHORT,   jshort,  Short,   short
2864                             , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2865                             HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2866 DEFINE_GETSCALARARRAYREGION(T_CHAR,    jchar,   Char,    char
2867                             ,  HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2868                             HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2869 DEFINE_GETSCALARARRAYREGION(T_INT,     jint,    Int,     int
2870                             , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2871                             HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2872 DEFINE_GETSCALARARRAYREGION(T_LONG,    jlong,   Long,    long
2873                             ,  HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2874                             HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2875 DEFINE_GETSCALARARRAYREGION(T_FLOAT,   jfloat,  Float,   float
2876                             , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2877                             HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2878 DEFINE_GETSCALARARRAYREGION(T_DOUBLE,  jdouble, Double,  double
2879                             , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2880                             HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2881 
2882 
2883 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2884                                     , EntryProbe, ReturnProbe); \
2885   DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2886                            ,ReturnProbe);           \
2887 \
2888 JNI_ENTRY(void, \
2889 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2890              jsize len, const ElementType *buf)) \
2891   JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2892   EntryProbe; \
2893   DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2894   typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2895   if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \
2896     THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2897   } else { \
2898     if (len > 0) { \
2899       int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \
2900       memcpy((u_char*) dst->Tag##_at_addr(start), \
2901              (u_char*) buf, \
2902              len << sc);    \
2903     } \
2904   } \
2905 JNI_END
2906 
2907 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2908                             , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2909                             HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2910 DEFINE_SETSCALARARRAYREGION(T_BYTE,    jbyte,    Byte,    byte
2911                             , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2912                             HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2913 DEFINE_SETSCALARARRAYREGION(T_SHORT,   jshort,   Short,   short
2914                             , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2915                             HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2916 DEFINE_SETSCALARARRAYREGION(T_CHAR,    jchar,    Char,    char
2917                             , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2918                             HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2919 DEFINE_SETSCALARARRAYREGION(T_INT,     jint,     Int,     int
2920                             , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2921                             HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2922 DEFINE_SETSCALARARRAYREGION(T_LONG,    jlong,    Long,    long
2923                             , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2924                             HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2925 DEFINE_SETSCALARARRAYREGION(T_FLOAT,   jfloat,   Float,   float
2926                             , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2927                             HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2928 DEFINE_SETSCALARARRAYREGION(T_DOUBLE,  jdouble,  Double,  double
2929                             , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2930                             HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2931 
2932 
2933 //
2934 // Interception of natives
2935 //
2936 
2937 // The RegisterNatives call being attempted tried to register with a method that
2938 // is not native.  Ask JVM TI what prefixes have been specified.  Then check
2939 // to see if the native method is now wrapped with the prefixes.  See the
2940 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
2941 static Method* find_prefixed_native(KlassHandle k,
2942                                       Symbol* name, Symbol* signature, TRAPS) {
2943 #if INCLUDE_JVMTI
2944   ResourceMark rm(THREAD);
2945   Method* method;
2946   int name_len = name->utf8_length();
2947   char* name_str = name->as_utf8();
2948   int prefix_count;
2949   char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
2950   for (int i = 0; i < prefix_count; i++) {
2951     char* prefix = prefixes[i];
2952     int prefix_len = (int)strlen(prefix);
2953 
2954     // try adding this prefix to the method name and see if it matches another method name
2955     int trial_len = name_len + prefix_len;
2956     char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
2957     strcpy(trial_name_str, prefix);
2958     strcat(trial_name_str, name_str);
2959     TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
2960     if (trial_name == NULL) {
2961       continue; // no such symbol, so this prefix wasn't used, try the next prefix
2962     }
2963     method = k()->lookup_method(trial_name, signature);
2964     if (method == NULL) {
2965       continue; // signature doesn't match, try the next prefix
2966     }
2967     if (method->is_native()) {
2968       method->set_is_prefixed_native();
2969       return method; // wahoo, we found a prefixed version of the method, return it
2970     }
2971     // found as non-native, so prefix is good, add it, probably just need more prefixes
2972     name_len = trial_len;
2973     name_str = trial_name_str;
2974   }
2975 #endif // INCLUDE_JVMTI
2976   return NULL; // not found
2977 }
2978 
2979 static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) {
2980   Method* method = k()->lookup_method(name, signature);
2981   if (method == NULL) {
2982     ResourceMark rm;
2983     stringStream st;
2984     st.print("Method %s name or signature does not match",
2985              Method::name_and_sig_as_C_string(k(), name, signature));
2986     THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2987   }
2988   if (!method->is_native()) {
2989     // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
2990     method = find_prefixed_native(k, name, signature, THREAD);
2991     if (method == NULL) {
2992       ResourceMark rm;
2993       stringStream st;
2994       st.print("Method %s is not declared as native",
2995                Method::name_and_sig_as_C_string(k(), name, signature));
2996       THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2997     }
2998   }
2999 
3000   if (entry != NULL) {
3001     method->set_native_function(entry,
3002       Method::native_bind_event_is_interesting);
3003   } else {
3004     method->clear_native_function();
3005   }
3006   if (PrintJNIResolving) {
3007     ResourceMark rm(THREAD);
3008     tty->print_cr("[Registering JNI native method %s.%s]",
3009       method->method_holder()->external_name(),
3010       method->name()->as_C_string());
3011   }
3012   return true;
3013 }
3014 
3015 DT_RETURN_MARK_DECL(RegisterNatives, jint
3016                     , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
3017 
3018 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
3019                                     const JNINativeMethod *methods,
3020                                     jint nMethods))
3021   JNIWrapper("RegisterNatives");
3022   HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
3023   jint ret = 0;
3024   DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
3025 
3026   KlassHandle h_k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
3027 
3028   for (int index = 0; index < nMethods; index++) {
3029     const char* meth_name = methods[index].name;
3030     const char* meth_sig = methods[index].signature;
3031     int meth_name_len = (int)strlen(meth_name);
3032 
3033     // The class should have been loaded (we have an instance of the class
3034     // passed in) so the method and signature should already be in the symbol
3035     // table.  If they're not there, the method doesn't exist.
3036     TempNewSymbol  name = SymbolTable::probe(meth_name, meth_name_len);
3037     TempNewSymbol  signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3038 
3039     if (name == NULL || signature == NULL) {
3040       ResourceMark rm;
3041       stringStream st;
3042       st.print("Method %s.%s%s not found", h_k()->external_name(), meth_name, meth_sig);
3043       // Must return negative value on failure
3044       THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3045     }
3046 
3047     bool res = register_native(h_k, name, signature,
3048                                (address) methods[index].fnPtr, THREAD);
3049     if (!res) {
3050       ret = -1;
3051       break;
3052     }
3053   }
3054   return ret;
3055 JNI_END
3056 
3057 
3058 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3059   JNIWrapper("UnregisterNatives");
3060  HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3061   Klass* k   = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3062   //%note jni_2
3063   if (k->is_instance_klass()) {
3064     for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3065       Method* m = InstanceKlass::cast(k)->methods()->at(index);
3066       if (m->is_native()) {
3067         m->clear_native_function();
3068         m->set_signature_handler(NULL);
3069       }
3070     }
3071   }
3072  HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3073   return 0;
3074 JNI_END
3075 
3076 //
3077 // Monitor functions
3078 //
3079 
3080 DT_RETURN_MARK_DECL(MonitorEnter, jint
3081                     , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3082 
3083 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3084  HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3085   jint ret = JNI_ERR;
3086   DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3087 
3088   // If the object is null, we can't do anything with it
3089   if (jobj == NULL) {
3090     THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3091   }
3092 
3093   Handle obj(thread, JNIHandles::resolve_non_null(jobj));
3094   ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3095   ret = JNI_OK;
3096   return ret;
3097 JNI_END
3098 
3099 DT_RETURN_MARK_DECL(MonitorExit, jint
3100                     , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3101 
3102 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3103  HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3104   jint ret = JNI_ERR;
3105   DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3106 
3107   // Don't do anything with a null object
3108   if (jobj == NULL) {
3109     THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3110   }
3111 
3112   Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
3113   ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3114 
3115   ret = JNI_OK;
3116   return ret;
3117 JNI_END
3118 
3119 //
3120 // Extensions
3121 //
3122 
3123 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3124                          , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3125 
3126 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3127   JNIWrapper("GetStringRegion");
3128  HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3129   DT_VOID_RETURN_MARK(GetStringRegion);
3130   oop s = JNIHandles::resolve_non_null(string);
3131   int s_len = java_lang_String::length(s);
3132   if (start < 0 || len < 0 || start + len > s_len) {
3133     THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3134   } else {
3135     if (len > 0) {
3136       typeArrayOop s_value = java_lang_String::value(s);
3137       bool is_latin1 = java_lang_String::is_latin1(s);
3138       if (!is_latin1) {
3139         memcpy(buf, s_value->char_at_addr(start), sizeof(jchar)*len);
3140       } else {
3141         for (int i = 0; i < len; i++) {
3142           buf[i] = ((jchar) s_value->byte_at(i + start)) & 0xff;
3143         }
3144       }
3145     }
3146   }
3147 JNI_END
3148 
3149 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3150                          , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3151 
3152 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3153   JNIWrapper("GetStringUTFRegion");
3154  HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3155   DT_VOID_RETURN_MARK(GetStringUTFRegion);
3156   oop s = JNIHandles::resolve_non_null(string);
3157   int s_len = java_lang_String::length(s);
3158   if (start < 0 || len < 0 || start + len > s_len) {
3159     THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3160   } else {
3161     //%note jni_7
3162     if (len > 0) {
3163       // Assume the buffer is large enough as the JNI spec. does not require user error checking
3164       java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX);
3165       // as_utf8_string null-terminates the result string
3166     } else {
3167       // JDK null-terminates the buffer even in len is zero
3168       if (buf != NULL) {
3169         buf[0] = 0;
3170       }
3171     }
3172   }
3173 JNI_END
3174 
3175 
3176 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3177   JNIWrapper("GetPrimitiveArrayCritical");
3178  HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3179   GCLocker::lock_critical(thread);
3180   if (isCopy != NULL) {
3181     *isCopy = JNI_FALSE;
3182   }
3183   oop a = JNIHandles::resolve_non_null(array);
3184   assert(a->is_array(), "just checking");
3185   BasicType type;
3186   if (a->is_objArray()) {
3187     type = T_OBJECT;
3188   } else {
3189     type = TypeArrayKlass::cast(a->klass())->element_type();
3190   }
3191   void* ret = arrayOop(a)->base(type);
3192  HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3193   return ret;
3194 JNI_END
3195 
3196 
3197 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3198   JNIWrapper("ReleasePrimitiveArrayCritical");
3199   HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3200   // The array, carray and mode arguments are ignored
3201   GCLocker::unlock_critical(thread);
3202 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3203 JNI_END
3204 
3205 
3206 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3207   JNIWrapper("GetStringCritical");
3208   HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3209   GCLocker::lock_critical(thread);
3210   oop s = JNIHandles::resolve_non_null(string);
3211   typeArrayOop s_value = java_lang_String::value(s);
3212   bool is_latin1 = java_lang_String::is_latin1(s);
3213   if (isCopy != NULL) {
3214     *isCopy = is_latin1 ? JNI_TRUE : JNI_FALSE;
3215   }
3216   jchar* ret;
3217   if (!is_latin1) {
3218     ret = (jchar*) s_value->base(T_CHAR);
3219   } else {
3220     // Inflate latin1 encoded string to UTF16
3221     int s_len = java_lang_String::length(s);
3222     ret = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal);  // add one for zero termination
3223     /* JNI Specification states return NULL on OOM */
3224     if (ret != NULL) {
3225       for (int i = 0; i < s_len; i++) {
3226         ret[i] = ((jchar) s_value->byte_at(i)) & 0xff;
3227       }
3228       ret[s_len] = 0;
3229     }
3230   }
3231  HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3232   return ret;
3233 JNI_END
3234 
3235 
3236 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3237   JNIWrapper("ReleaseStringCritical");
3238   HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3239   // The str and chars arguments are ignored for UTF16 strings
3240   oop s = JNIHandles::resolve_non_null(str);
3241   bool is_latin1 = java_lang_String::is_latin1(s);
3242   if (is_latin1) {
3243     // For latin1 string, free jchar array allocated by earlier call to GetStringCritical.
3244     // This assumes that ReleaseStringCritical bookends GetStringCritical.
3245     FREE_C_HEAP_ARRAY(jchar, chars);
3246   }
3247   GCLocker::unlock_critical(thread);
3248 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3249 JNI_END
3250 
3251 
3252 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3253   JNIWrapper("jni_NewWeakGlobalRef");
3254  HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3255   Handle ref_handle(thread, JNIHandles::resolve(ref));
3256   jweak ret = JNIHandles::make_weak_global(ref_handle);
3257  HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3258   return ret;
3259 JNI_END
3260 
3261 // Must be JNI_ENTRY (with HandleMark)
3262 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3263   JNIWrapper("jni_DeleteWeakGlobalRef");
3264   HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3265   JNIHandles::destroy_weak_global(ref);
3266   HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3267 JNI_END
3268 
3269 
3270 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env))
3271   JNIWrapper("jni_ExceptionCheck");
3272  HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3273   jni_check_async_exceptions(thread);
3274   jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3275  HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3276   return ret;
3277 JNI_END
3278 
3279 
3280 // Initialization state for three routines below relating to
3281 // java.nio.DirectBuffers
3282 static          jint directBufferSupportInitializeStarted = 0;
3283 static volatile jint directBufferSupportInitializeEnded   = 0;
3284 static volatile jint directBufferSupportInitializeFailed  = 0;
3285 static jclass    bufferClass                 = NULL;
3286 static jclass    directBufferClass           = NULL;
3287 static jclass    directByteBufferClass       = NULL;
3288 static jmethodID directByteBufferConstructor = NULL;
3289 static jfieldID  directBufferAddressField    = NULL;
3290 static jfieldID  bufferCapacityField         = NULL;
3291 
3292 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3293   Handle loader;            // null (bootstrap) loader
3294   Handle protection_domain; // null protection domain
3295 
3296   TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
3297   jclass result =  find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3298 
3299   if (log_is_enabled(Debug, class, resolve) && result != NULL) {
3300     trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3301   }
3302   return result;
3303 }
3304 
3305 // These lookups are done with the NULL (bootstrap) ClassLoader to
3306 // circumvent any security checks that would be done by jni_FindClass.
3307 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3308 {
3309   if ((bufferClass           = lookupOne(env, "java/nio/Buffer", thread))           == NULL) { return false; }
3310   if ((directBufferClass     = lookupOne(env, "sun/nio/ch/DirectBuffer", thread))   == NULL) { return false; }
3311   if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3312   return true;
3313 }
3314 JNI_END
3315 
3316 
3317 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3318   if (directBufferSupportInitializeFailed) {
3319     return false;
3320   }
3321 
3322   if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3323     if (!lookupDirectBufferClasses(env)) {
3324       directBufferSupportInitializeFailed = 1;
3325       return false;
3326     }
3327 
3328     // Make global references for these
3329     bufferClass           = (jclass) env->NewGlobalRef(bufferClass);
3330     directBufferClass     = (jclass) env->NewGlobalRef(directBufferClass);
3331     directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3332 
3333     // Get needed field and method IDs
3334     directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3335     if (env->ExceptionCheck()) {
3336       env->ExceptionClear();
3337       directBufferSupportInitializeFailed = 1;
3338       return false;
3339     }
3340     directBufferAddressField    = env->GetFieldID(bufferClass, "address", "J");
3341     if (env->ExceptionCheck()) {
3342       env->ExceptionClear();
3343       directBufferSupportInitializeFailed = 1;
3344       return false;
3345     }
3346     bufferCapacityField         = env->GetFieldID(bufferClass, "capacity", "I");
3347     if (env->ExceptionCheck()) {
3348       env->ExceptionClear();
3349       directBufferSupportInitializeFailed = 1;
3350       return false;
3351     }
3352 
3353     if ((directByteBufferConstructor == NULL) ||
3354         (directBufferAddressField    == NULL) ||
3355         (bufferCapacityField         == NULL)) {
3356       directBufferSupportInitializeFailed = 1;
3357       return false;
3358     }
3359 
3360     directBufferSupportInitializeEnded = 1;
3361   } else {
3362     while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3363       os::naked_yield();
3364     }
3365   }
3366 
3367   return !directBufferSupportInitializeFailed;
3368 }
3369 
3370 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3371 {
3372   // thread_from_jni_environment() will block if VM is gone.
3373   JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3374 
3375   JNIWrapper("jni_NewDirectByteBuffer");
3376  HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3377 
3378   if (!directBufferSupportInitializeEnded) {
3379     if (!initializeDirectBufferSupport(env, thread)) {
3380       HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3381       return NULL;
3382     }
3383   }
3384 
3385   // Being paranoid about accidental sign extension on address
3386   jlong addr = (jlong) ((uintptr_t) address);
3387   // NOTE that package-private DirectByteBuffer constructor currently
3388   // takes int capacity
3389   jint  cap  = (jint)  capacity;
3390   jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3391   HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3392   return ret;
3393 }
3394 
3395 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3396                     , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3397 
3398 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3399 {
3400   // thread_from_jni_environment() will block if VM is gone.
3401   JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3402 
3403   JNIWrapper("jni_GetDirectBufferAddress");
3404   HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3405   void* ret = NULL;
3406   DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3407 
3408   if (!directBufferSupportInitializeEnded) {
3409     if (!initializeDirectBufferSupport(env, thread)) {
3410       return 0;
3411     }
3412   }
3413 
3414   if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3415     return 0;
3416   }
3417 
3418   ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3419   return ret;
3420 }
3421 
3422 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3423                     , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3424 
3425 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
3426 {
3427   // thread_from_jni_environment() will block if VM is gone.
3428   JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3429 
3430   JNIWrapper("jni_GetDirectBufferCapacity");
3431   HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3432   jlong ret = -1;
3433   DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3434 
3435   if (!directBufferSupportInitializeEnded) {
3436     if (!initializeDirectBufferSupport(env, thread)) {
3437       ret = 0;
3438       return ret;
3439     }
3440   }
3441 
3442   if (buf == NULL) {
3443     return -1;
3444   }
3445 
3446   if (!env->IsInstanceOf(buf, directBufferClass)) {
3447     return -1;
3448   }
3449 
3450   // NOTE that capacity is currently an int in the implementation
3451   ret = env->GetIntField(buf, bufferCapacityField);
3452   return ret;
3453 }
3454 
3455 
3456 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3457   JNIWrapper("GetVersion");
3458   HOTSPOT_JNI_GETVERSION_ENTRY(env);
3459   HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3460   return CurrentVersion;
3461 JNI_END
3462 
3463 extern struct JavaVM_ main_vm;
3464 
3465 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3466   JNIWrapper("jni_GetJavaVM");
3467   HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3468   *vm  = (JavaVM *)(&main_vm);
3469   HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3470   return JNI_OK;
3471 JNI_END
3472 
3473 
3474 JNI_ENTRY(jobject, jni_GetModule(JNIEnv* env, jclass clazz))
3475   JNIWrapper("GetModule");
3476   return Modules::get_module(clazz, THREAD);
3477 JNI_END
3478 
3479 
3480 JNI_ENTRY(void, jni_AddModuleReads(JNIEnv* env, jobject m1, jobject m2))
3481   JNIWrapper("AddModuleReads");
3482   if (m1 == NULL || m2 == NULL) {
3483     THROW(vmSymbols::java_lang_NullPointerException());
3484   }
3485   JavaValue result(T_VOID);
3486   Handle m1_h(THREAD, JNIHandles::resolve(m1));
3487   if (!java_lang_reflect_Module::is_instance(m1_h())) {
3488     THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Bad m1 object");
3489   }
3490   Handle m2_h(THREAD, JNIHandles::resolve(m2));
3491   if (!java_lang_reflect_Module::is_instance(m2_h())) {
3492     THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Bad m2 object");
3493   }
3494   JavaCalls::call_static(&result,
3495                          KlassHandle(THREAD, SystemDictionary::module_Modules_klass()),
3496                          vmSymbols::addReads_name(),
3497                          vmSymbols::addReads_signature(),
3498                          m1_h,
3499                          m2_h,
3500                          THREAD);
3501 JNI_END
3502 
3503 
3504 JNI_ENTRY(jboolean, jni_CanReadModule(JNIEnv* env, jobject m1, jobject m2))
3505   JNIWrapper("CanReadModule");
3506   if (m1 == NULL || m2 == NULL) {
3507     THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3508   }
3509   jboolean res = Modules::can_read_module(m1, m2, CHECK_false);
3510   return res;
3511 JNI_END
3512 
3513 
3514 // Structure containing all jni functions
3515 struct JNINativeInterface_ jni_NativeInterface = {
3516     NULL,
3517     NULL,
3518     NULL,
3519 
3520     NULL,
3521 
3522     jni_GetVersion,
3523 
3524     jni_DefineClass,
3525     jni_FindClass,
3526 
3527     jni_FromReflectedMethod,
3528     jni_FromReflectedField,
3529 
3530     jni_ToReflectedMethod,
3531 
3532     jni_GetSuperclass,
3533     jni_IsAssignableFrom,
3534 
3535     jni_ToReflectedField,
3536 
3537     jni_Throw,
3538     jni_ThrowNew,
3539     jni_ExceptionOccurred,
3540     jni_ExceptionDescribe,
3541     jni_ExceptionClear,
3542     jni_FatalError,
3543 
3544     jni_PushLocalFrame,
3545     jni_PopLocalFrame,
3546 
3547     jni_NewGlobalRef,
3548     jni_DeleteGlobalRef,
3549     jni_DeleteLocalRef,
3550     jni_IsSameObject,
3551 
3552     jni_NewLocalRef,
3553     jni_EnsureLocalCapacity,
3554 
3555     jni_AllocObject,
3556     jni_NewObject,
3557     jni_NewObjectV,
3558     jni_NewObjectA,
3559 
3560     jni_GetObjectClass,
3561     jni_IsInstanceOf,
3562 
3563     jni_GetMethodID,
3564 
3565     jni_CallObjectMethod,
3566     jni_CallObjectMethodV,
3567     jni_CallObjectMethodA,
3568     jni_CallBooleanMethod,
3569     jni_CallBooleanMethodV,
3570     jni_CallBooleanMethodA,
3571     jni_CallByteMethod,
3572     jni_CallByteMethodV,
3573     jni_CallByteMethodA,
3574     jni_CallCharMethod,
3575     jni_CallCharMethodV,
3576     jni_CallCharMethodA,
3577     jni_CallShortMethod,
3578     jni_CallShortMethodV,
3579     jni_CallShortMethodA,
3580     jni_CallIntMethod,
3581     jni_CallIntMethodV,
3582     jni_CallIntMethodA,
3583     jni_CallLongMethod,
3584     jni_CallLongMethodV,
3585     jni_CallLongMethodA,
3586     jni_CallFloatMethod,
3587     jni_CallFloatMethodV,
3588     jni_CallFloatMethodA,
3589     jni_CallDoubleMethod,
3590     jni_CallDoubleMethodV,
3591     jni_CallDoubleMethodA,
3592     jni_CallVoidMethod,
3593     jni_CallVoidMethodV,
3594     jni_CallVoidMethodA,
3595 
3596     jni_CallNonvirtualObjectMethod,
3597     jni_CallNonvirtualObjectMethodV,
3598     jni_CallNonvirtualObjectMethodA,
3599     jni_CallNonvirtualBooleanMethod,
3600     jni_CallNonvirtualBooleanMethodV,
3601     jni_CallNonvirtualBooleanMethodA,
3602     jni_CallNonvirtualByteMethod,
3603     jni_CallNonvirtualByteMethodV,
3604     jni_CallNonvirtualByteMethodA,
3605     jni_CallNonvirtualCharMethod,
3606     jni_CallNonvirtualCharMethodV,
3607     jni_CallNonvirtualCharMethodA,
3608     jni_CallNonvirtualShortMethod,
3609     jni_CallNonvirtualShortMethodV,
3610     jni_CallNonvirtualShortMethodA,
3611     jni_CallNonvirtualIntMethod,
3612     jni_CallNonvirtualIntMethodV,
3613     jni_CallNonvirtualIntMethodA,
3614     jni_CallNonvirtualLongMethod,
3615     jni_CallNonvirtualLongMethodV,
3616     jni_CallNonvirtualLongMethodA,
3617     jni_CallNonvirtualFloatMethod,
3618     jni_CallNonvirtualFloatMethodV,
3619     jni_CallNonvirtualFloatMethodA,
3620     jni_CallNonvirtualDoubleMethod,
3621     jni_CallNonvirtualDoubleMethodV,
3622     jni_CallNonvirtualDoubleMethodA,
3623     jni_CallNonvirtualVoidMethod,
3624     jni_CallNonvirtualVoidMethodV,
3625     jni_CallNonvirtualVoidMethodA,
3626 
3627     jni_GetFieldID,
3628 
3629     jni_GetObjectField,
3630     jni_GetBooleanField,
3631     jni_GetByteField,
3632     jni_GetCharField,
3633     jni_GetShortField,
3634     jni_GetIntField,
3635     jni_GetLongField,
3636     jni_GetFloatField,
3637     jni_GetDoubleField,
3638 
3639     jni_SetObjectField,
3640     jni_SetBooleanField,
3641     jni_SetByteField,
3642     jni_SetCharField,
3643     jni_SetShortField,
3644     jni_SetIntField,
3645     jni_SetLongField,
3646     jni_SetFloatField,
3647     jni_SetDoubleField,
3648 
3649     jni_GetStaticMethodID,
3650 
3651     jni_CallStaticObjectMethod,
3652     jni_CallStaticObjectMethodV,
3653     jni_CallStaticObjectMethodA,
3654     jni_CallStaticBooleanMethod,
3655     jni_CallStaticBooleanMethodV,
3656     jni_CallStaticBooleanMethodA,
3657     jni_CallStaticByteMethod,
3658     jni_CallStaticByteMethodV,
3659     jni_CallStaticByteMethodA,
3660     jni_CallStaticCharMethod,
3661     jni_CallStaticCharMethodV,
3662     jni_CallStaticCharMethodA,
3663     jni_CallStaticShortMethod,
3664     jni_CallStaticShortMethodV,
3665     jni_CallStaticShortMethodA,
3666     jni_CallStaticIntMethod,
3667     jni_CallStaticIntMethodV,
3668     jni_CallStaticIntMethodA,
3669     jni_CallStaticLongMethod,
3670     jni_CallStaticLongMethodV,
3671     jni_CallStaticLongMethodA,
3672     jni_CallStaticFloatMethod,
3673     jni_CallStaticFloatMethodV,
3674     jni_CallStaticFloatMethodA,
3675     jni_CallStaticDoubleMethod,
3676     jni_CallStaticDoubleMethodV,
3677     jni_CallStaticDoubleMethodA,
3678     jni_CallStaticVoidMethod,
3679     jni_CallStaticVoidMethodV,
3680     jni_CallStaticVoidMethodA,
3681 
3682     jni_GetStaticFieldID,
3683 
3684     jni_GetStaticObjectField,
3685     jni_GetStaticBooleanField,
3686     jni_GetStaticByteField,
3687     jni_GetStaticCharField,
3688     jni_GetStaticShortField,
3689     jni_GetStaticIntField,
3690     jni_GetStaticLongField,
3691     jni_GetStaticFloatField,
3692     jni_GetStaticDoubleField,
3693 
3694     jni_SetStaticObjectField,
3695     jni_SetStaticBooleanField,
3696     jni_SetStaticByteField,
3697     jni_SetStaticCharField,
3698     jni_SetStaticShortField,
3699     jni_SetStaticIntField,
3700     jni_SetStaticLongField,
3701     jni_SetStaticFloatField,
3702     jni_SetStaticDoubleField,
3703 
3704     jni_NewString,
3705     jni_GetStringLength,
3706     jni_GetStringChars,
3707     jni_ReleaseStringChars,
3708 
3709     jni_NewStringUTF,
3710     jni_GetStringUTFLength,
3711     jni_GetStringUTFChars,
3712     jni_ReleaseStringUTFChars,
3713 
3714     jni_GetArrayLength,
3715 
3716     jni_NewObjectArray,
3717     jni_GetObjectArrayElement,
3718     jni_SetObjectArrayElement,
3719 
3720     jni_NewBooleanArray,
3721     jni_NewByteArray,
3722     jni_NewCharArray,
3723     jni_NewShortArray,
3724     jni_NewIntArray,
3725     jni_NewLongArray,
3726     jni_NewFloatArray,
3727     jni_NewDoubleArray,
3728 
3729     jni_GetBooleanArrayElements,
3730     jni_GetByteArrayElements,
3731     jni_GetCharArrayElements,
3732     jni_GetShortArrayElements,
3733     jni_GetIntArrayElements,
3734     jni_GetLongArrayElements,
3735     jni_GetFloatArrayElements,
3736     jni_GetDoubleArrayElements,
3737 
3738     jni_ReleaseBooleanArrayElements,
3739     jni_ReleaseByteArrayElements,
3740     jni_ReleaseCharArrayElements,
3741     jni_ReleaseShortArrayElements,
3742     jni_ReleaseIntArrayElements,
3743     jni_ReleaseLongArrayElements,
3744     jni_ReleaseFloatArrayElements,
3745     jni_ReleaseDoubleArrayElements,
3746 
3747     jni_GetBooleanArrayRegion,
3748     jni_GetByteArrayRegion,
3749     jni_GetCharArrayRegion,
3750     jni_GetShortArrayRegion,
3751     jni_GetIntArrayRegion,
3752     jni_GetLongArrayRegion,
3753     jni_GetFloatArrayRegion,
3754     jni_GetDoubleArrayRegion,
3755 
3756     jni_SetBooleanArrayRegion,
3757     jni_SetByteArrayRegion,
3758     jni_SetCharArrayRegion,
3759     jni_SetShortArrayRegion,
3760     jni_SetIntArrayRegion,
3761     jni_SetLongArrayRegion,
3762     jni_SetFloatArrayRegion,
3763     jni_SetDoubleArrayRegion,
3764 
3765     jni_RegisterNatives,
3766     jni_UnregisterNatives,
3767 
3768     jni_MonitorEnter,
3769     jni_MonitorExit,
3770 
3771     jni_GetJavaVM,
3772 
3773     jni_GetStringRegion,
3774     jni_GetStringUTFRegion,
3775 
3776     jni_GetPrimitiveArrayCritical,
3777     jni_ReleasePrimitiveArrayCritical,
3778 
3779     jni_GetStringCritical,
3780     jni_ReleaseStringCritical,
3781 
3782     jni_NewWeakGlobalRef,
3783     jni_DeleteWeakGlobalRef,
3784 
3785     jni_ExceptionCheck,
3786 
3787     jni_NewDirectByteBuffer,
3788     jni_GetDirectBufferAddress,
3789     jni_GetDirectBufferCapacity,
3790 
3791     // New 1_6 features
3792 
3793     jni_GetObjectRefType,
3794 
3795     // Module features
3796 
3797     jni_GetModule,
3798     jni_AddModuleReads,
3799     jni_CanReadModule
3800 };
3801 
3802 
3803 // For jvmti use to modify jni function table.
3804 // Java threads in native contiues to run until it is transitioned
3805 // to VM at safepoint. Before the transition or before it is blocked
3806 // for safepoint it may access jni function table. VM could crash if
3807 // any java thread access the jni function table in the middle of memcpy.
3808 // To avoid this each function pointers are copied automically.
3809 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3810   assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3811   intptr_t *a = (intptr_t *) jni_functions();
3812   intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3813   for (uint i=0; i <  sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3814     Atomic::store_ptr(*b++, a++);
3815   }
3816 }
3817 
3818 void quicken_jni_functions() {
3819   // Replace Get<Primitive>Field with fast versions
3820   if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
3821       && !VerifyJNIFields && !CountJNICalls && !CheckJNICalls
3822 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2)
3823       // windows x86 currently needs SEH wrapper and the gain of the fast
3824       // versions currently isn't certain for server vm on uniprocessor.
3825       && os::is_MP()
3826 #endif
3827   ) {
3828     address func;
3829     func = JNI_FastGetField::generate_fast_get_boolean_field();
3830     if (func != (address)-1) {
3831       jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3832     }
3833     func = JNI_FastGetField::generate_fast_get_byte_field();
3834     if (func != (address)-1) {
3835       jni_NativeInterface.GetByteField = (GetByteField_t)func;
3836     }
3837     func = JNI_FastGetField::generate_fast_get_char_field();
3838     if (func != (address)-1) {
3839       jni_NativeInterface.GetCharField = (GetCharField_t)func;
3840     }
3841     func = JNI_FastGetField::generate_fast_get_short_field();
3842     if (func != (address)-1) {
3843       jni_NativeInterface.GetShortField = (GetShortField_t)func;
3844     }
3845     func = JNI_FastGetField::generate_fast_get_int_field();
3846     if (func != (address)-1) {
3847       jni_NativeInterface.GetIntField = (GetIntField_t)func;
3848     }
3849     func = JNI_FastGetField::generate_fast_get_long_field();
3850     if (func != (address)-1) {
3851       jni_NativeInterface.GetLongField = (GetLongField_t)func;
3852     }
3853     func = JNI_FastGetField::generate_fast_get_float_field();
3854     if (func != (address)-1) {
3855       jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3856     }
3857     func = JNI_FastGetField::generate_fast_get_double_field();
3858     if (func != (address)-1) {
3859       jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3860     }
3861   }
3862 }
3863 
3864 // Returns the function structure
3865 struct JNINativeInterface_* jni_functions() {
3866 #if INCLUDE_JNI_CHECK
3867   if (CheckJNICalls) return jni_functions_check();
3868 #endif // INCLUDE_JNI_CHECK
3869   return &jni_NativeInterface;
3870 }
3871 
3872 // Returns the function structure
3873 struct JNINativeInterface_* jni_functions_nocheck() {
3874   return &jni_NativeInterface;
3875 }
3876 
3877 
3878 // Invocation API
3879 
3880 
3881 // Forward declaration
3882 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3883 
3884 // Global invocation API vars
3885 volatile jint vm_created = 0;
3886 // Indicate whether it is safe to recreate VM
3887 volatile jint safe_to_recreate_vm = 1;
3888 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3889 
3890 
3891 #define JAVASTACKSIZE (400 * 1024)    /* Default size of a thread java stack */
3892 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3893 
3894 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3895                     , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3896 
3897 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3898   HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3899   JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3900   jint ret = JNI_ERR;
3901   DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3902 
3903   if (Threads::is_supported_jni_version(args->version)) {
3904     ret = JNI_OK;
3905   }
3906   // 1.1 style no longer supported in hotspot.
3907   // According the JNI spec, we should update args->version on return.
3908   // We also use the structure to communicate with launcher about default
3909   // stack size.
3910   if (args->version == JNI_VERSION_1_1) {
3911     args->version = JNI_VERSION_1_2;
3912     // javaStackSize is int in arguments structure
3913     assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3914     args->javaStackSize = (jint)(ThreadStackSize * K);
3915   }
3916   return ret;
3917 }
3918 
3919 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3920                     , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3921 
3922 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3923   HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3924 
3925   jint result = JNI_ERR;
3926   DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3927 
3928   // We're about to use Atomic::xchg for synchronization.  Some Zero
3929   // platforms use the GCC builtin __sync_lock_test_and_set for this,
3930   // but __sync_lock_test_and_set is not guaranteed to do what we want
3931   // on all architectures.  So we check it works before relying on it.
3932 #if defined(ZERO) && defined(ASSERT)
3933   {
3934     jint a = 0xcafebabe;
3935     jint b = Atomic::xchg(0xdeadbeef, &a);
3936     void *c = &a;
3937     void *d = Atomic::xchg_ptr(&b, &c);
3938     assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3939     assert(c == &b && d == &a, "Atomic::xchg_ptr() works");
3940   }
3941 #endif // ZERO && ASSERT
3942 
3943   // At the moment it's only possible to have one Java VM,
3944   // since some of the runtime state is in global variables.
3945 
3946   // We cannot use our mutex locks here, since they only work on
3947   // Threads. We do an atomic compare and exchange to ensure only
3948   // one thread can call this method at a time
3949 
3950   // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3951   // the add/dec implementations are dependent on whether we are running
3952   // on a multiprocessor, and at this stage of initialization the os::is_MP
3953   // function used to determine this will always return false. Atomic::xchg
3954   // does not have this problem.
3955   if (Atomic::xchg(1, &vm_created) == 1) {
3956     return JNI_EEXIST;   // already created, or create attempt in progress
3957   }
3958   if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3959     return JNI_ERR;  // someone tried and failed and retry not allowed.
3960   }
3961 
3962   assert(vm_created == 1, "vm_created is true during the creation");
3963 
3964   /**
3965    * Certain errors during initialization are recoverable and do not
3966    * prevent this method from being called again at a later time
3967    * (perhaps with different arguments).  However, at a certain
3968    * point during initialization if an error occurs we cannot allow
3969    * this function to be called again (or it will crash).  In those
3970    * situations, the 'canTryAgain' flag is set to false, which atomically
3971    * sets safe_to_recreate_vm to 1, such that any new call to
3972    * JNI_CreateJavaVM will immediately fail using the above logic.
3973    */
3974   bool can_try_again = true;
3975 
3976   result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3977   if (result == JNI_OK) {
3978     JavaThread *thread = JavaThread::current();
3979     assert(!thread->has_pending_exception(), "should have returned not OK");
3980     /* thread is thread_in_vm here */
3981     *vm = (JavaVM *)(&main_vm);
3982     *(JNIEnv**)penv = thread->jni_environment();
3983 
3984 #if INCLUDE_JVMCI
3985     if (EnableJVMCI) {
3986       if (UseJVMCICompiler) {
3987         // JVMCI is initialized on a CompilerThread
3988         if (BootstrapJVMCI) {
3989           JavaThread* THREAD = thread;
3990           JVMCICompiler* compiler = JVMCICompiler::instance(CATCH);
3991           compiler->bootstrap();
3992           if (HAS_PENDING_EXCEPTION) {
3993             HandleMark hm;
3994             vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
3995           }
3996         }
3997       }
3998     }
3999 #endif
4000 
4001     // Tracks the time application was running before GC
4002     RuntimeService::record_application_start();
4003 
4004     // Notify JVMTI
4005     if (JvmtiExport::should_post_thread_life()) {
4006        JvmtiExport::post_thread_start(thread);
4007     }
4008 
4009     EventThreadStart event;
4010     if (event.should_commit()) {
4011       event.set_thread(THREAD_TRACE_ID(thread));
4012       event.commit();
4013     }
4014 
4015 #ifndef PRODUCT
4016     // Check if we should compile all classes on bootclasspath
4017     if (CompileTheWorld) ClassLoader::compile_the_world();
4018     if (ReplayCompiles) ciReplay::replay(thread);
4019 
4020     // Some platforms (like Win*) need a wrapper around these test
4021     // functions in order to properly handle error conditions.
4022     test_error_handler();
4023     if (ExecuteInternalVMTests) {
4024       InternalVMTests::run();
4025     }
4026 #endif
4027 
4028     // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
4029     ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4030   } else {
4031     // If create_vm exits because of a pending exception, exit with that
4032     // exception.  In the future when we figure out how to reclaim memory,
4033     // we may be able to exit with JNI_ERR and allow the calling application
4034     // to continue.
4035     if (Universe::is_fully_initialized()) {
4036       // otherwise no pending exception possible - VM will already have aborted
4037       JavaThread* THREAD = JavaThread::current();
4038       if (HAS_PENDING_EXCEPTION) {
4039         HandleMark hm;
4040         vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
4041       }
4042     }
4043 
4044     if (can_try_again) {
4045       // reset safe_to_recreate_vm to 1 so that retrial would be possible
4046       safe_to_recreate_vm = 1;
4047     }
4048 
4049     // Creation failed. We must reset vm_created
4050     *vm = 0;
4051     *(JNIEnv**)penv = 0;
4052     // reset vm_created last to avoid race condition. Use OrderAccess to
4053     // control both compiler and architectural-based reordering.
4054     OrderAccess::release_store(&vm_created, 0);
4055   }
4056 
4057   // Flush stdout and stderr before exit.
4058   fflush(stdout);
4059   fflush(stderr);
4060 
4061   return result;
4062 
4063 }
4064 
4065 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
4066   jint result = 0;
4067   // On Windows, let CreateJavaVM run with SEH protection
4068 #ifdef _WIN32
4069   __try {
4070 #endif
4071     result = JNI_CreateJavaVM_inner(vm, penv, args);
4072 #ifdef _WIN32
4073   } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4074     // Nothing to do.
4075   }
4076 #endif
4077   return result;
4078 }
4079 
4080 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4081   // See bug 4367188, the wrapper can sometimes cause VM crashes
4082   // JNIWrapper("GetCreatedJavaVMs");
4083 
4084   HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4085 
4086   if (vm_created) {
4087     if (numVMs != NULL) *numVMs = 1;
4088     if (bufLen > 0)     *vm_buf = (JavaVM *)(&main_vm);
4089   } else {
4090     if (numVMs != NULL) *numVMs = 0;
4091   }
4092   HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4093   return JNI_OK;
4094 }
4095 
4096 extern "C" {
4097 
4098 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4099                     , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4100 
4101 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4102   HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4103   jint res = JNI_ERR;
4104   DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4105 
4106   if (!vm_created) {
4107     res = JNI_ERR;
4108     return res;
4109   }
4110 
4111   JNIWrapper("DestroyJavaVM");
4112   JNIEnv *env;
4113   JavaVMAttachArgs destroyargs;
4114   destroyargs.version = CurrentVersion;
4115   destroyargs.name = (char *)"DestroyJavaVM";
4116   destroyargs.group = NULL;
4117   res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4118   if (res != JNI_OK) {
4119     return res;
4120   }
4121 
4122   // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4123   JavaThread* thread = JavaThread::current();
4124   ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4125   if (Threads::destroy_vm()) {
4126     // Should not change thread state, VM is gone
4127     vm_created = false;
4128     res = JNI_OK;
4129     return res;
4130   } else {
4131     ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4132     res = JNI_ERR;
4133     return res;
4134   }
4135 }
4136 
4137 
4138 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4139   JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4140 
4141   // Check below commented out from JDK1.2fcs as well
4142   /*
4143   if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4144     return JNI_EVERSION;
4145   }
4146   */
4147 
4148   Thread* t = Thread::current_or_null();
4149   if (t != NULL) {
4150     // If the thread has been attached this operation is a no-op
4151     *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4152     return JNI_OK;
4153   }
4154 
4155   // Create a thread and mark it as attaching so it will be skipped by the
4156   // ThreadsListEnumerator - see CR 6404306
4157   JavaThread* thread = new JavaThread(true);
4158 
4159   // Set correct safepoint info. The thread is going to call into Java when
4160   // initializing the Java level thread object. Hence, the correct state must
4161   // be set in order for the Safepoint code to deal with it correctly.
4162   thread->set_thread_state(_thread_in_vm);
4163   thread->record_stack_base_and_size();
4164   thread->initialize_thread_current();
4165 
4166   if (!os::create_attached_thread(thread)) {
4167     delete thread;
4168     return JNI_ERR;
4169   }
4170   // Enable stack overflow checks
4171   thread->create_stack_guard_pages();
4172 
4173   thread->initialize_tlab();
4174 
4175   thread->cache_global_variables();
4176 
4177   // Crucial that we do not have a safepoint check for this thread, since it has
4178   // not been added to the Thread list yet.
4179   { Threads_lock->lock_without_safepoint_check();
4180     // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4181     // avoid this thread trying to do a GC before it is added to the thread-list
4182     thread->set_active_handles(JNIHandleBlock::allocate_block());
4183     Threads::add(thread, daemon);
4184     Threads_lock->unlock();
4185   }
4186   // Create thread group and name info from attach arguments
4187   oop group = NULL;
4188   char* thread_name = NULL;
4189   if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4190     group = JNIHandles::resolve(args->group);
4191     thread_name = args->name; // may be NULL
4192   }
4193   if (group == NULL) group = Universe::main_thread_group();
4194 
4195   // Create Java level thread object and attach it to this thread
4196   bool attach_failed = false;
4197   {
4198     EXCEPTION_MARK;
4199     HandleMark hm(THREAD);
4200     Handle thread_group(THREAD, group);
4201     thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4202     if (HAS_PENDING_EXCEPTION) {
4203       CLEAR_PENDING_EXCEPTION;
4204       // cleanup outside the handle mark.
4205       attach_failed = true;
4206     }
4207   }
4208 
4209   if (attach_failed) {
4210     // Added missing cleanup
4211     thread->cleanup_failed_attach_current_thread();
4212     return JNI_ERR;
4213   }
4214 
4215   // mark the thread as no longer attaching
4216   // this uses a fence to push the change through so we don't have
4217   // to regrab the threads_lock
4218   thread->set_done_attaching_via_jni();
4219 
4220   // Set java thread status.
4221   java_lang_Thread::set_thread_status(thread->threadObj(),
4222               java_lang_Thread::RUNNABLE);
4223 
4224   // Notify the debugger
4225   if (JvmtiExport::should_post_thread_life()) {
4226     JvmtiExport::post_thread_start(thread);
4227   }
4228 
4229   EventThreadStart event;
4230   if (event.should_commit()) {
4231     event.set_thread(THREAD_TRACE_ID(thread));
4232     event.commit();
4233   }
4234 
4235   *(JNIEnv**)penv = thread->jni_environment();
4236 
4237   // Now leaving the VM, so change thread_state. This is normally automatically taken care
4238   // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4239   // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4240   // needed.
4241 
4242   ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4243 
4244   // Perform any platform dependent FPU setup
4245   os::setup_fpu();
4246 
4247   return JNI_OK;
4248 }
4249 
4250 
4251 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4252   HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4253   if (!vm_created) {
4254   HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4255     return JNI_ERR;
4256   }
4257 
4258   JNIWrapper("AttachCurrentThread");
4259   jint ret = attach_current_thread(vm, penv, _args, false);
4260   HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4261   return ret;
4262 }
4263 
4264 
4265 jint JNICALL jni_DetachCurrentThread(JavaVM *vm)  {
4266   HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4267   VM_Exit::block_if_vm_exited();
4268 
4269   JNIWrapper("DetachCurrentThread");
4270 
4271   // If the thread has already been detached the operation is a no-op
4272   if (Thread::current_or_null() == NULL) {
4273   HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4274     return JNI_OK;
4275   }
4276 
4277   JavaThread* thread = JavaThread::current();
4278   if (thread->has_last_Java_frame()) {
4279   HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4280     // Can't detach a thread that's running java, that can't work.
4281     return JNI_ERR;
4282   }
4283 
4284   // Safepoint support. Have to do call-back to safepoint code, if in the
4285   // middel of a safepoint operation
4286   ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4287 
4288   // XXX: Note that JavaThread::exit() call below removes the guards on the
4289   // stack pages set up via enable_stack_{red,yellow}_zone() calls
4290   // above in jni_AttachCurrentThread. Unfortunately, while the setting
4291   // of the guards is visible in jni_AttachCurrentThread above,
4292   // the removal of the guards is buried below in JavaThread::exit()
4293   // here. The abstraction should be more symmetrically either exposed
4294   // or hidden (e.g. it could probably be hidden in the same
4295   // (platform-dependent) methods where we do alternate stack
4296   // maintenance work?)
4297   thread->exit(false, JavaThread::jni_detach);
4298   delete thread;
4299 
4300   HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4301   return JNI_OK;
4302 }
4303 
4304 DT_RETURN_MARK_DECL(GetEnv, jint
4305                     , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4306 
4307 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4308   HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4309   jint ret = JNI_ERR;
4310   DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4311 
4312   if (!vm_created) {
4313     *penv = NULL;
4314     ret = JNI_EDETACHED;
4315     return ret;
4316   }
4317 
4318   if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4319     return ret;
4320   }
4321 
4322 #ifndef JVMPI_VERSION_1
4323 // need these in order to be polite about older agents
4324 #define JVMPI_VERSION_1   ((jint)0x10000001)
4325 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4326 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4327 #endif // !JVMPI_VERSION_1
4328 
4329   Thread* thread = Thread::current_or_null();
4330   if (thread != NULL && thread->is_Java_thread()) {
4331     if (Threads::is_supported_jni_version_including_1_1(version)) {
4332       *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4333       ret = JNI_OK;
4334       return ret;
4335 
4336     } else if (version == JVMPI_VERSION_1 ||
4337                version == JVMPI_VERSION_1_1 ||
4338                version == JVMPI_VERSION_1_2) {
4339       tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4340       tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4341       ret = JNI_EVERSION;
4342       return ret;
4343     } else if (JvmtiExport::is_jvmdi_version(version)) {
4344       tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4345       tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4346       ret = JNI_EVERSION;
4347       return ret;
4348     } else {
4349       *penv = NULL;
4350       ret = JNI_EVERSION;
4351       return ret;
4352     }
4353   } else {
4354     *penv = NULL;
4355     ret = JNI_EDETACHED;
4356     return ret;
4357   }
4358 }
4359 
4360 
4361 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4362   HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4363   if (!vm_created) {
4364   HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4365     return JNI_ERR;
4366   }
4367 
4368   JNIWrapper("AttachCurrentThreadAsDaemon");
4369   jint ret = attach_current_thread(vm, penv, _args, true);
4370   HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4371   return ret;
4372 }
4373 
4374 
4375 } // End extern "C"
4376 
4377 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4378     NULL,
4379     NULL,
4380     NULL,
4381 
4382     jni_DestroyJavaVM,
4383     jni_AttachCurrentThread,
4384     jni_DetachCurrentThread,
4385     jni_GetEnv,
4386     jni_AttachCurrentThreadAsDaemon
4387 };