1 /*
   2  * Copyright (c) 1997, 2015, 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/classLoader.hpp"
  30 #include "classfile/javaClasses.hpp"
  31 #include "classfile/symbolTable.hpp"
  32 #include "classfile/systemDictionary.hpp"
  33 #include "classfile/vmSymbols.hpp"
  34 #include "gc/shared/gcLocker.inline.hpp"
  35 #include "interpreter/linkResolver.hpp"
  36 #include "memory/allocation.hpp"
  37 #include "memory/allocation.inline.hpp"
  38 #include "memory/oopFactory.hpp"
  39 #include "memory/universe.inline.hpp"
  40 #include "oops/instanceKlass.hpp"
  41 #include "oops/instanceOop.hpp"
  42 #include "oops/markOop.hpp"
  43 #include "oops/method.hpp"
  44 #include "oops/objArrayKlass.hpp"
  45 #include "oops/objArrayOop.inline.hpp"
  46 #include "oops/oop.inline.hpp"
  47 #include "oops/symbol.hpp"
  48 #include "oops/typeArrayKlass.hpp"
  49 #include "oops/typeArrayOop.hpp"
  50 #include "prims/jni.h"
  51 #include "prims/jniCheck.hpp"
  52 #include "prims/jniExport.hpp"
  53 #include "prims/jniFastGetField.hpp"
  54 #include "prims/jvm.h"
  55 #include "prims/jvm_misc.hpp"
  56 #include "prims/jvmtiExport.hpp"
  57 #include "prims/jvmtiThreadState.hpp"
  58 #include "runtime/atomic.inline.hpp"
  59 #include "runtime/compilationPolicy.hpp"
  60 #include "runtime/fieldDescriptor.hpp"
  61 #include "runtime/fprofiler.hpp"
  62 #include "runtime/handles.inline.hpp"
  63 #include "runtime/interfaceSupport.hpp"
  64 #include "runtime/java.hpp"
  65 #include "runtime/javaCalls.hpp"
  66 #include "runtime/jfieldIDWorkaround.hpp"
  67 #include "runtime/orderAccess.inline.hpp"
  68 #include "runtime/reflection.hpp"
  69 #include "runtime/sharedRuntime.hpp"
  70 #include "runtime/signature.hpp"
  71 #include "runtime/thread.inline.hpp"
  72 #include "runtime/vm_operations.hpp"
  73 #include "services/memTracker.hpp"
  74 #include "services/runtimeService.hpp"
  75 #include "trace/tracing.hpp"
  76 #include "utilities/defaultStream.hpp"
  77 #include "utilities/dtrace.hpp"
  78 #include "utilities/events.hpp"
  79 #include "utilities/histogram.hpp"
  80 #include "utilities/macros.hpp"
  81 #if INCLUDE_ALL_GCS
  82 #include "gc/g1/g1SATBCardTableModRefBS.hpp"
  83 #endif // INCLUDE_ALL_GCS
  84 
  85 static jint CurrentVersion = JNI_VERSION_1_8;
  86 
  87 #ifdef _WIN32
  88 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
  89 #endif
  90 
  91 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace
  92 // '-return' probe regardless of the return path is taken out of the function.
  93 // Methods that have multiple return paths use this to avoid having to
  94 // instrument each return path.  Methods that use CHECK or THROW must use this
  95 // since those macros can cause an immedate uninstrumented return.
  96 //
  97 // In order to get the return value, a reference to the variable containing
  98 // the return value must be passed to the contructor of the object, and
  99 // the return value must be set before return (since the mark object has
 100 // a reference to it).
 101 //
 102 // Example:
 103 // DT_RETURN_MARK_DECL(SomeFunc, int);
 104 // JNI_ENTRY(int, SomeFunc, ...)
 105 //   int return_value = 0;
 106 //   DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);
 107 //   foo(CHECK_0)
 108 //   return_value = 5;
 109 //   return return_value;
 110 // JNI_END
 111 #define DT_RETURN_MARK_DECL(name, type, probe)                             \
 112   DTRACE_ONLY(                                                             \
 113     class DTraceReturnProbeMark_##name {                                   \
 114      public:                                                               \
 115       const type& _ret_ref;                                                \
 116       DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {}         \
 117       ~DTraceReturnProbeMark_##name() {                                    \
 118         probe;                                                             \
 119       }                                                                    \
 120     }                                                                      \
 121   )
 122 // Void functions are simpler since there's no return value
 123 #define DT_VOID_RETURN_MARK_DECL(name, probe)                              \
 124   DTRACE_ONLY(                                                             \
 125     class DTraceReturnProbeMark_##name {                                   \
 126      public:                                                               \
 127       ~DTraceReturnProbeMark_##name() {                                    \
 128         probe;                                                             \
 129       }                                                                    \
 130     }                                                                      \
 131   )
 132 
 133 // Place these macros in the function to mark the return.  Non-void
 134 // functions need the type and address of the return value.
 135 #define DT_RETURN_MARK(name, type, ref) \
 136   DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )
 137 #define DT_VOID_RETURN_MARK(name) \
 138   DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )
 139 
 140 
 141 // Use these to select distinct code for floating-point vs. non-floating point
 142 // situations.  Used from within common macros where we need slightly
 143 // different behavior for Float/Double
 144 #define FP_SELECT_Boolean(intcode, fpcode) intcode
 145 #define FP_SELECT_Byte(intcode, fpcode)    intcode
 146 #define FP_SELECT_Char(intcode, fpcode)    intcode
 147 #define FP_SELECT_Short(intcode, fpcode)   intcode
 148 #define FP_SELECT_Object(intcode, fpcode)  intcode
 149 #define FP_SELECT_Int(intcode, fpcode)     intcode
 150 #define FP_SELECT_Long(intcode, fpcode)    intcode
 151 #define FP_SELECT_Float(intcode, fpcode)   fpcode
 152 #define FP_SELECT_Double(intcode, fpcode)  fpcode
 153 #define FP_SELECT(TypeName, intcode, fpcode) \
 154   FP_SELECT_##TypeName(intcode, fpcode)
 155 
 156 #define COMMA ,
 157 
 158 // Choose DT_RETURN_MARK macros  based on the type: float/double -> void
 159 // (dtrace doesn't do FP yet)
 160 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type, probe)    \
 161   FP_SELECT(TypeName, \
 162     DT_RETURN_MARK_DECL(name, type, probe), DT_VOID_RETURN_MARK_DECL(name, probe) )
 163 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \
 164   FP_SELECT(TypeName, \
 165     DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )
 166 
 167 
 168 // out-of-line helpers for class jfieldIDWorkaround:
 169 
 170 bool jfieldIDWorkaround::is_valid_jfieldID(Klass* k, jfieldID id) {
 171   if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {
 172     uintptr_t as_uint = (uintptr_t) id;
 173     intptr_t offset = raw_instance_offset(id);
 174     if (is_checked_jfieldID(id)) {
 175       if (!klass_hash_ok(k, id)) {
 176         return false;
 177       }
 178     }
 179     return InstanceKlass::cast(k)->contains_field_offset(offset);
 180   } else {
 181     JNIid* result = (JNIid*) id;
 182 #ifdef ASSERT
 183     return result != NULL && result->is_static_field_id();
 184 #else
 185     return result != NULL;
 186 #endif
 187   }
 188 }
 189 
 190 
 191 intptr_t jfieldIDWorkaround::encode_klass_hash(Klass* k, intptr_t offset) {
 192   if (offset <= small_offset_mask) {
 193     Klass* field_klass = k;
 194     Klass* super_klass = field_klass->super();
 195     // With compressed oops the most super class with nonstatic fields would
 196     // be the owner of fields embedded in the header.
 197     while (InstanceKlass::cast(super_klass)->has_nonstatic_fields() &&
 198            InstanceKlass::cast(super_klass)->contains_field_offset(offset)) {
 199       field_klass = super_klass;   // super contains the field also
 200       super_klass = field_klass->super();
 201     }
 202     debug_only(No_Safepoint_Verifier nosafepoint;)
 203     uintptr_t klass_hash = field_klass->identity_hash();
 204     return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;
 205   } else {
 206 #if 0
 207     #ifndef PRODUCT
 208     {
 209       ResourceMark rm;
 210       warning("VerifyJNIFields: long offset %d in %s", offset, k->external_name());
 211     }
 212     #endif
 213 #endif
 214     return 0;
 215   }
 216 }
 217 
 218 bool jfieldIDWorkaround::klass_hash_ok(Klass* k, jfieldID id) {
 219   uintptr_t as_uint = (uintptr_t) id;
 220   intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;
 221   do {
 222     debug_only(No_Safepoint_Verifier nosafepoint;)
 223     // Could use a non-blocking query for identity_hash here...
 224     if ((k->identity_hash() & klass_mask) == klass_hash)
 225       return true;
 226     k = k->super();
 227   } while (k != NULL);
 228   return false;
 229 }
 230 
 231 void jfieldIDWorkaround::verify_instance_jfieldID(Klass* k, jfieldID id) {
 232   guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );
 233   uintptr_t as_uint = (uintptr_t) id;
 234   intptr_t offset = raw_instance_offset(id);
 235   if (VerifyJNIFields) {
 236     if (is_checked_jfieldID(id)) {
 237       guarantee(klass_hash_ok(k, id),
 238     "Bug in native code: jfieldID class must match object");
 239     } else {
 240 #if 0
 241       #ifndef PRODUCT
 242       if (Verbose) {
 243   ResourceMark rm;
 244   warning("VerifyJNIFields: unverified offset %d for %s", offset, k->external_name());
 245       }
 246       #endif
 247 #endif
 248     }
 249   }
 250   guarantee(InstanceKlass::cast(k)->contains_field_offset(offset),
 251       "Bug in native code: jfieldID offset must address interior of object");
 252 }
 253 
 254 // Wrapper to trace JNI functions
 255 
 256 #ifdef ASSERT
 257   Histogram* JNIHistogram;
 258   static volatile jint JNIHistogram_lock = 0;
 259 
 260   class JNITraceWrapper : public StackObj {
 261    public:
 262     JNITraceWrapper(const char* format, ...) ATTRIBUTE_PRINTF(2, 3) {
 263       if (TraceJNICalls) {
 264         va_list ap;
 265         va_start(ap, format);
 266         tty->print("JNI ");
 267         tty->vprint_cr(format, ap);
 268         va_end(ap);
 269       }
 270     }
 271   };
 272 
 273   class JNIHistogramElement : public HistogramElement {
 274     public:
 275      JNIHistogramElement(const char* name);
 276   };
 277 
 278   JNIHistogramElement::JNIHistogramElement(const char* elementName) {
 279     _name = elementName;
 280     uintx count = 0;
 281 
 282     while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) {
 283       while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) {
 284         count +=1;
 285         if ( (WarnOnStalledSpinLock > 0)
 286           && (count % WarnOnStalledSpinLock == 0)) {
 287           warning("JNIHistogram_lock seems to be stalled");
 288         }
 289       }
 290      }
 291 
 292 
 293     if(JNIHistogram == NULL)
 294       JNIHistogram = new Histogram("JNI Call Counts",100);
 295 
 296     JNIHistogram->add_element(this);
 297     Atomic::dec(&JNIHistogram_lock);
 298   }
 299 
 300   #define JNICountWrapper(arg)                                     \
 301      static JNIHistogramElement* e = new JNIHistogramElement(arg); \
 302       /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \
 303      if (e != NULL) e->increment_count()
 304   #define JNIWrapper(arg) JNICountWrapper(arg); JNITraceWrapper(arg)
 305 #else
 306   #define JNIWrapper(arg)
 307 #endif
 308 
 309 
 310 // Implementation of JNI entries
 311 
 312 DT_RETURN_MARK_DECL(DefineClass, jclass
 313                     , HOTSPOT_JNI_DEFINECLASS_RETURN(_ret_ref));
 314 
 315 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,
 316                                   const jbyte *buf, jsize bufLen))
 317   JNIWrapper("DefineClass");
 318 
 319   HOTSPOT_JNI_DEFINECLASS_ENTRY(
 320     env, (char*) name, loaderRef, (char*) buf, bufLen);
 321 
 322   jclass cls = NULL;
 323   DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);
 324 
 325   TempNewSymbol class_name = NULL;
 326   // Since exceptions can be thrown, class initialization can take place
 327   // if name is NULL no check for class name in .class stream has to be made.
 328   if (name != NULL) {
 329     const int str_len = (int)strlen(name);
 330     if (str_len > Symbol::max_length()) {
 331       // It's impossible to create this class;  the name cannot fit
 332       // into the constant pool.
 333       THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
 334     }
 335     class_name = SymbolTable::new_symbol(name, CHECK_NULL);
 336   }
 337   ResourceMark rm(THREAD);
 338   ClassFileStream st((u1*) buf, bufLen, NULL);
 339   Handle class_loader (THREAD, oopDesc::bs()->write_barrier(JNIHandles::resolve(loaderRef)));
 340 
 341   if (UsePerfData && !class_loader.is_null()) {
 342     // check whether the current caller thread holds the lock or not.
 343     // If not, increment the corresponding counter
 344     if (ObjectSynchronizer::
 345         query_lock_ownership((JavaThread*)THREAD, class_loader) !=
 346         ObjectSynchronizer::owner_self) {
 347       ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();
 348     }
 349   }
 350   Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
 351                                                      Handle(), &st, true,
 352                                                      CHECK_NULL);
 353 
 354   if (TraceClassResolution && k != NULL) {
 355     trace_class_resolution(k);
 356   }
 357 
 358   cls = (jclass)JNIHandles::make_local(
 359     env, k->java_mirror());
 360   return cls;
 361 JNI_END
 362 
 363 
 364 
 365 static bool first_time_FindClass = true;
 366 
 367 DT_RETURN_MARK_DECL(FindClass, jclass
 368                     , HOTSPOT_JNI_FINDCLASS_RETURN(_ret_ref));
 369 
 370 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))
 371   JNIWrapper("FindClass");
 372 
 373   HOTSPOT_JNI_FINDCLASS_ENTRY(env, (char *)name);
 374 
 375   jclass result = NULL;
 376   DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);
 377 
 378   // Remember if we are the first invocation of jni_FindClass
 379   bool first_time = first_time_FindClass;
 380   first_time_FindClass = false;
 381 
 382   // Sanity check the name:  it cannot be null or larger than the maximum size
 383   // name we can fit in the constant pool.
 384   if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
 385     THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
 386   }
 387 
 388   //%note jni_3
 389   Handle loader;
 390   Handle protection_domain;
 391   // Find calling class
 392   instanceKlassHandle k (THREAD, thread->security_get_caller_class(0));
 393   if (k.not_null()) {
 394     loader = Handle(THREAD, k->class_loader());
 395     // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed
 396     // in the correct class context.
 397     if (loader.is_null() &&
 398         k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {
 399       JavaValue result(T_OBJECT);
 400       JavaCalls::call_static(&result, k,
 401                                       vmSymbols::getFromClass_name(),
 402                                       vmSymbols::void_class_signature(),
 403                                       thread);
 404       if (HAS_PENDING_EXCEPTION) {
 405         Handle ex(thread, thread->pending_exception());
 406         CLEAR_PENDING_EXCEPTION;
 407         THROW_HANDLE_0(ex);
 408       }
 409       oop mirror = (oop) result.get_jobject();
 410       loader = Handle(THREAD,
 411         InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->class_loader());
 412       protection_domain = Handle(THREAD,
 413         InstanceKlass::cast(java_lang_Class::as_Klass(mirror))->protection_domain());
 414     }
 415   } else {
 416     // We call ClassLoader.getSystemClassLoader to obtain the system class loader.
 417     loader = Handle(THREAD, SystemDictionary::java_system_loader());
 418   }
 419 
 420   TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
 421   result = find_class_from_class_loader(env, sym, true, loader,
 422                                         protection_domain, true, thread);
 423 
 424   if (TraceClassResolution && result != NULL) {
 425     trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
 426   }
 427 
 428   // If we were the first invocation of jni_FindClass, we enable compilation again
 429   // rather than just allowing invocation counter to overflow and decay.
 430   // Controlled by flag DelayCompilationDuringStartup.
 431   if (first_time && !CompileTheWorld)
 432     CompilationPolicy::completed_vm_startup();
 433 
 434   return result;
 435 JNI_END
 436 
 437 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID
 438                     , HOTSPOT_JNI_FROMREFLECTEDMETHOD_RETURN((uintptr_t)_ret_ref));
 439 
 440 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))
 441   JNIWrapper("FromReflectedMethod");
 442 
 443   HOTSPOT_JNI_FROMREFLECTEDMETHOD_ENTRY(env, method);
 444 
 445   jmethodID ret = NULL;
 446   DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);
 447 
 448   // method is a handle to a java.lang.reflect.Method object
 449   oop reflected  = JNIHandles::resolve_non_null(method);
 450   oop mirror     = NULL;
 451   int slot       = 0;
 452 
 453   if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
 454     mirror = java_lang_reflect_Constructor::clazz(reflected);
 455     slot   = java_lang_reflect_Constructor::slot(reflected);
 456   } else {
 457     assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");
 458     mirror = java_lang_reflect_Method::clazz(reflected);
 459     slot   = java_lang_reflect_Method::slot(reflected);
 460   }
 461   Klass* k     = java_lang_Class::as_Klass(mirror);
 462 
 463   KlassHandle k1(THREAD, k);
 464   // Make sure class is initialized before handing id's out to methods
 465   k1()->initialize(CHECK_NULL);
 466   Method* m = InstanceKlass::cast(k1())->method_with_idnum(slot);
 467   ret = m==NULL? NULL : m->jmethod_id();  // return NULL if reflected method deleted
 468   return ret;
 469 JNI_END
 470 
 471 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID
 472                     , HOTSPOT_JNI_FROMREFLECTEDFIELD_RETURN((uintptr_t)_ret_ref));
 473 
 474 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))
 475   JNIWrapper("FromReflectedField");
 476 
 477   HOTSPOT_JNI_FROMREFLECTEDFIELD_ENTRY(env, field);
 478 
 479   jfieldID ret = NULL;
 480   DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);
 481 
 482   // field is a handle to a java.lang.reflect.Field object
 483   oop reflected   = JNIHandles::resolve_non_null(field);
 484   oop mirror      = java_lang_reflect_Field::clazz(reflected);
 485   Klass* k      = java_lang_Class::as_Klass(mirror);
 486   int slot        = java_lang_reflect_Field::slot(reflected);
 487   int modifiers   = java_lang_reflect_Field::modifiers(reflected);
 488 
 489   KlassHandle k1(THREAD, k);
 490   // Make sure class is initialized before handing id's out to fields
 491   k1()->initialize(CHECK_NULL);
 492 
 493   // First check if this is a static field
 494   if (modifiers & JVM_ACC_STATIC) {
 495     intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
 496     JNIid* id = InstanceKlass::cast(k1())->jni_id_for(offset);
 497     assert(id != NULL, "corrupt Field object");
 498     debug_only(id->set_is_static_field_id();)
 499     // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
 500     ret = jfieldIDWorkaround::to_static_jfieldID(id);
 501     return ret;
 502   }
 503 
 504   // The slot is the index of the field description in the field-array
 505   // The jfieldID is the offset of the field within the object
 506   // It may also have hash bits for k, if VerifyJNIFields is turned on.
 507   intptr_t offset = InstanceKlass::cast(k1())->field_offset( slot );
 508   assert(InstanceKlass::cast(k1())->contains_field_offset(offset), "stay within object");
 509   ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset);
 510   return ret;
 511 JNI_END
 512 
 513 
 514 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject
 515                     , HOTSPOT_JNI_TOREFLECTEDMETHOD_RETURN(_ret_ref));
 516 
 517 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))
 518   JNIWrapper("ToReflectedMethod");
 519 
 520   HOTSPOT_JNI_TOREFLECTEDMETHOD_ENTRY(env, cls, (uintptr_t) method_id, isStatic);
 521 
 522   jobject ret = NULL;
 523   DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);
 524 
 525   methodHandle m (THREAD, Method::resolve_jmethod_id(method_id));
 526   assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");
 527   oop reflection_method;
 528   if (m->is_initializer()) {
 529     reflection_method = Reflection::new_constructor(m, CHECK_NULL);
 530   } else {
 531     reflection_method = Reflection::new_method(m, false, CHECK_NULL);
 532   }
 533   ret = JNIHandles::make_local(env, reflection_method);
 534   return ret;
 535 JNI_END
 536 
 537 DT_RETURN_MARK_DECL(GetSuperclass, jclass
 538                     , HOTSPOT_JNI_GETSUPERCLASS_RETURN(_ret_ref));
 539 
 540 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))
 541   JNIWrapper("GetSuperclass");
 542 
 543   HOTSPOT_JNI_GETSUPERCLASS_ENTRY(env, sub);
 544 
 545   jclass obj = NULL;
 546   DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);
 547 
 548   oop mirror = JNIHandles::resolve_non_null(sub);
 549   // primitive classes return NULL
 550   if (java_lang_Class::is_primitive(mirror)) return NULL;
 551 
 552   // Rules of Class.getSuperClass as implemented by KLass::java_super:
 553   // arrays return Object
 554   // interfaces return NULL
 555   // proper classes return Klass::super()
 556   Klass* k = java_lang_Class::as_Klass(mirror);
 557   if (k->is_interface()) return NULL;
 558 
 559   // return mirror for superclass
 560   Klass* super = k->java_super();
 561   // super2 is the value computed by the compiler's getSuperClass intrinsic:
 562   debug_only(Klass* super2 = ( k->oop_is_array()
 563                                  ? SystemDictionary::Object_klass()
 564                                  : k->super() ) );
 565   assert(super == super2,
 566          "java_super computation depends on interface, array, other super");
 567   obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(super->java_mirror());
 568   return obj;
 569 JNI_END
 570 
 571 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))
 572   JNIWrapper("IsSubclassOf");
 573 
 574   HOTSPOT_JNI_ISASSIGNABLEFROM_ENTRY(env, sub, super);
 575 
 576   oop sub_mirror   = JNIHandles::resolve_non_null(sub);
 577   oop super_mirror = JNIHandles::resolve_non_null(super);
 578 
 579   sub_mirror = oopDesc::bs()->write_barrier(sub_mirror);
 580   super_mirror = oopDesc::bs()->write_barrier(super_mirror);
 581 
 582   if (java_lang_Class::is_primitive(sub_mirror) ||
 583       java_lang_Class::is_primitive(super_mirror)) {
 584     jboolean ret = (sub_mirror == super_mirror);
 585 
 586     HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
 587     return ret;
 588   }
 589   Klass* sub_klass   = java_lang_Class::as_Klass(sub_mirror);
 590   Klass* super_klass = java_lang_Class::as_Klass(super_mirror);
 591   assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");
 592   jboolean ret = sub_klass->is_subtype_of(super_klass) ?
 593                    JNI_TRUE : JNI_FALSE;
 594 
 595   HOTSPOT_JNI_ISASSIGNABLEFROM_RETURN(ret);
 596   return ret;
 597 JNI_END
 598 
 599 
 600 DT_RETURN_MARK_DECL(Throw, jint
 601                     , HOTSPOT_JNI_THROW_RETURN(_ret_ref));
 602 
 603 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))
 604   JNIWrapper("Throw");
 605 
 606   HOTSPOT_JNI_THROW_ENTRY(env, obj);
 607 
 608   jint ret = JNI_OK;
 609   DT_RETURN_MARK(Throw, jint, (const jint&)ret);
 610 
 611   THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);
 612   ShouldNotReachHere();
 613   return 0;  // Mute compiler.
 614 JNI_END
 615 
 616 
 617 DT_RETURN_MARK_DECL(ThrowNew, jint
 618                     , HOTSPOT_JNI_THROWNEW_RETURN(_ret_ref));
 619 
 620 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))
 621   JNIWrapper("ThrowNew");
 622 
 623   HOTSPOT_JNI_THROWNEW_ENTRY(env, clazz, (char *) message);
 624 
 625   jint ret = JNI_OK;
 626   DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);
 627 
 628   InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
 629   Symbol*  name = k->name();
 630   Handle class_loader (THREAD,  k->class_loader());
 631   Handle protection_domain (THREAD, k->protection_domain());
 632   THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);
 633   ShouldNotReachHere();
 634   return 0;  // Mute compiler.
 635 JNI_END
 636 
 637 
 638 // JNI functions only transform a pending async exception to a synchronous
 639 // exception in ExceptionOccurred and ExceptionCheck calls, since
 640 // delivering an async exception in other places won't change the native
 641 // code's control flow and would be harmful when native code further calls
 642 // JNI functions with a pending exception. Async exception is also checked
 643 // during the call, so ExceptionOccurred/ExceptionCheck won't return
 644 // false but deliver the async exception at the very end during
 645 // state transition.
 646 
 647 static void jni_check_async_exceptions(JavaThread *thread) {
 648   assert(thread == Thread::current(), "must be itself");
 649   thread->check_and_handle_async_exceptions();
 650 }
 651 
 652 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))
 653   JNIWrapper("ExceptionOccurred");
 654 
 655   HOTSPOT_JNI_EXCEPTIONOCCURRED_ENTRY(env);
 656 
 657   jni_check_async_exceptions(thread);
 658   oop exception = thread->pending_exception();
 659   jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);
 660 
 661   HOTSPOT_JNI_EXCEPTIONOCCURRED_RETURN(ret);
 662   return ret;
 663 JNI_END
 664 
 665 
 666 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))
 667   JNIWrapper("ExceptionDescribe");
 668 
 669   HOTSPOT_JNI_EXCEPTIONDESCRIBE_ENTRY(env);
 670 
 671   if (thread->has_pending_exception()) {
 672     Handle ex(thread, thread->pending_exception());
 673     thread->clear_pending_exception();
 674     if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {
 675       // Don't print anything if we are being killed.
 676     } else {
 677       jio_fprintf(defaultStream::error_stream(), "Exception ");
 678       if (thread != NULL && thread->threadObj() != NULL) {
 679         ResourceMark rm(THREAD);
 680         jio_fprintf(defaultStream::error_stream(),
 681         "in thread \"%s\" ", thread->get_thread_name());
 682       }
 683       if (ex->is_a(SystemDictionary::Throwable_klass())) {
 684         JavaValue result(T_VOID);
 685         JavaCalls::call_virtual(&result,
 686                                 ex,
 687                                 KlassHandle(THREAD,
 688                                   SystemDictionary::Throwable_klass()),
 689                                 vmSymbols::printStackTrace_name(),
 690                                 vmSymbols::void_method_signature(),
 691                                 THREAD);
 692         // If an exception is thrown in the call it gets thrown away. Not much
 693         // we can do with it. The native code that calls this, does not check
 694         // for the exception - hence, it might still be in the thread when DestroyVM gets
 695         // called, potentially causing a few asserts to trigger - since no pending exception
 696         // is expected.
 697         CLEAR_PENDING_EXCEPTION;
 698       } else {
 699         ResourceMark rm(THREAD);
 700         jio_fprintf(defaultStream::error_stream(),
 701         ". Uncaught exception of type %s.",
 702         ex->klass()->external_name());
 703       }
 704     }
 705   }
 706 
 707   HOTSPOT_JNI_EXCEPTIONDESCRIBE_RETURN();
 708 JNI_END
 709 
 710 
 711 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env))
 712   JNIWrapper("ExceptionClear");
 713 
 714   HOTSPOT_JNI_EXCEPTIONCLEAR_ENTRY(env);
 715 
 716   // The jni code might be using this API to clear java thrown exception.
 717   // So just mark jvmti thread exception state as exception caught.
 718   JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();
 719   if (state != NULL && state->is_exception_detected()) {
 720     state->set_exception_caught();
 721   }
 722   thread->clear_pending_exception();
 723 
 724   HOTSPOT_JNI_EXCEPTIONCLEAR_RETURN();
 725 JNI_END
 726 
 727 
 728 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))
 729   JNIWrapper("FatalError");
 730 
 731   HOTSPOT_JNI_FATALERROR_ENTRY(env, (char *) msg);
 732 
 733   tty->print_cr("FATAL ERROR in native method: %s", msg);
 734   thread->print_stack();
 735   os::abort(); // Dump core and abort
 736 JNI_END
 737 
 738 
 739 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))
 740   JNIWrapper("PushLocalFrame");
 741 
 742   HOTSPOT_JNI_PUSHLOCALFRAME_ENTRY(env, capacity);
 743 
 744   //%note jni_11
 745   if (capacity < 0 ||
 746       ((MaxJNILocalCapacity > 0) && (capacity > MaxJNILocalCapacity))) {
 747     HOTSPOT_JNI_PUSHLOCALFRAME_RETURN((uint32_t)JNI_ERR);
 748     return JNI_ERR;
 749   }
 750   JNIHandleBlock* old_handles = thread->active_handles();
 751   JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
 752   assert(new_handles != NULL, "should not be NULL");
 753   new_handles->set_pop_frame_link(old_handles);
 754   thread->set_active_handles(new_handles);
 755   jint ret = JNI_OK;
 756   HOTSPOT_JNI_PUSHLOCALFRAME_RETURN(ret);
 757   return ret;
 758 JNI_END
 759 
 760 
 761 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))
 762   JNIWrapper("PopLocalFrame");
 763 
 764   HOTSPOT_JNI_POPLOCALFRAME_ENTRY(env, result);
 765 
 766   //%note jni_11
 767   Handle result_handle(thread, JNIHandles::resolve(result));
 768   JNIHandleBlock* old_handles = thread->active_handles();
 769   JNIHandleBlock* new_handles = old_handles->pop_frame_link();
 770   if (new_handles != NULL) {
 771     // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.
 772     // This way code will still work if PopLocalFrame is called without a corresponding
 773     // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise
 774     // the release_block call will release the blocks.
 775     thread->set_active_handles(new_handles);
 776     old_handles->set_pop_frame_link(NULL);              // clear link we won't release new_handles below
 777     JNIHandleBlock::release_block(old_handles, thread); // may block
 778     result = JNIHandles::make_local(thread, result_handle());
 779   }
 780   HOTSPOT_JNI_POPLOCALFRAME_RETURN(result);
 781   return result;
 782 JNI_END
 783 
 784 
 785 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))
 786   JNIWrapper("NewGlobalRef");
 787 
 788   HOTSPOT_JNI_NEWGLOBALREF_ENTRY(env, ref);
 789 
 790   Handle ref_handle(thread, JNIHandles::resolve(ref));
 791   jobject ret = JNIHandles::make_global(ref_handle);
 792 
 793   HOTSPOT_JNI_NEWGLOBALREF_RETURN(ret);
 794   return ret;
 795 JNI_END
 796 
 797 // Must be JNI_ENTRY (with HandleMark)
 798 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))
 799   JNIWrapper("DeleteGlobalRef");
 800 
 801   HOTSPOT_JNI_DELETEGLOBALREF_ENTRY(env, ref);
 802 
 803   JNIHandles::destroy_global(ref);
 804 
 805   HOTSPOT_JNI_DELETEGLOBALREF_RETURN();
 806 JNI_END
 807 
 808 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))
 809   JNIWrapper("DeleteLocalRef");
 810 
 811   HOTSPOT_JNI_DELETELOCALREF_ENTRY(env, obj);
 812 
 813   JNIHandles::destroy_local(obj);
 814 
 815   HOTSPOT_JNI_DELETELOCALREF_RETURN();
 816 JNI_END
 817 
 818 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))
 819   JNIWrapper("IsSameObject");
 820 
 821   HOTSPOT_JNI_ISSAMEOBJECT_ENTRY(env, r1, r2);
 822 
 823   oop a = JNIHandles::resolve(r1);
 824   a = oopDesc::bs()->write_barrier(a);
 825   oop b = JNIHandles::resolve(r2);
 826   b = oopDesc::bs()->write_barrier(b);
 827   jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE;
 828 
 829   HOTSPOT_JNI_ISSAMEOBJECT_RETURN(ret);
 830   return ret;
 831 JNI_END
 832 
 833 
 834 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))
 835   JNIWrapper("NewLocalRef");
 836 
 837   HOTSPOT_JNI_NEWLOCALREF_ENTRY(env, ref);
 838 
 839   jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));
 840 
 841   HOTSPOT_JNI_NEWLOCALREF_RETURN(ret);
 842   return ret;
 843 JNI_END
 844 
 845 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))
 846   JNIWrapper("EnsureLocalCapacity");
 847 
 848   HOTSPOT_JNI_ENSURELOCALCAPACITY_ENTRY(env, capacity);
 849 
 850   jint ret;
 851   if (capacity >= 0 &&
 852       ((MaxJNILocalCapacity <= 0) || (capacity <= MaxJNILocalCapacity))) {
 853     ret = JNI_OK;
 854   } else {
 855     ret = JNI_ERR;
 856   }
 857 
 858   HOTSPOT_JNI_ENSURELOCALCAPACITY_RETURN(ret);
 859   return ret;
 860 JNI_END
 861 
 862 // Return the Handle Type
 863 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))
 864   JNIWrapper("GetObjectRefType");
 865 
 866   HOTSPOT_JNI_GETOBJECTREFTYPE_ENTRY(env, obj);
 867 
 868   jobjectRefType ret;
 869   if (JNIHandles::is_local_handle(thread, obj) ||
 870       JNIHandles::is_frame_handle(thread, obj))
 871     ret = JNILocalRefType;
 872   else if (JNIHandles::is_global_handle(obj))
 873     ret = JNIGlobalRefType;
 874   else if (JNIHandles::is_weak_global_handle(obj))
 875     ret = JNIWeakGlobalRefType;
 876   else
 877     ret = JNIInvalidRefType;
 878 
 879   HOTSPOT_JNI_GETOBJECTREFTYPE_RETURN((void *) ret);
 880   return ret;
 881 JNI_END
 882 
 883 
 884 class JNI_ArgumentPusher : public SignatureIterator {
 885  protected:
 886   JavaCallArguments*  _arguments;
 887 
 888   virtual void get_bool   () = 0;
 889   virtual void get_char   () = 0;
 890   virtual void get_short  () = 0;
 891   virtual void get_byte   () = 0;
 892   virtual void get_int    () = 0;
 893   virtual void get_long   () = 0;
 894   virtual void get_float  () = 0;
 895   virtual void get_double () = 0;
 896   virtual void get_object () = 0;
 897 
 898   JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {
 899     this->_return_type = T_ILLEGAL;
 900     _arguments = NULL;
 901   }
 902 
 903  public:
 904   virtual void iterate( uint64_t fingerprint ) = 0;
 905 
 906   void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }
 907 
 908   inline void do_bool()                     { if (!is_return_type()) get_bool();   }
 909   inline void do_char()                     { if (!is_return_type()) get_char();   }
 910   inline void do_short()                    { if (!is_return_type()) get_short();  }
 911   inline void do_byte()                     { if (!is_return_type()) get_byte();   }
 912   inline void do_int()                      { if (!is_return_type()) get_int();    }
 913   inline void do_long()                     { if (!is_return_type()) get_long();   }
 914   inline void do_float()                    { if (!is_return_type()) get_float();  }
 915   inline void do_double()                   { if (!is_return_type()) get_double(); }
 916   inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }
 917   inline void do_array(int begin, int end)  { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array
 918   inline void do_void()                     { }
 919 
 920   JavaCallArguments* arguments()     { return _arguments; }
 921   void push_receiver(Handle h)       { _arguments->push_oop(h); }
 922 };
 923 
 924 
 925 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {
 926  protected:
 927   va_list _ap;
 928 
 929   inline void get_bool()   { _arguments->push_int(va_arg(_ap, jint)); } // bool is coerced to int when using va_arg
 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 #ifdef va_copy
 945     va_copy(_ap, rap);
 946 #elif defined (__va_copy)
 947     __va_copy(_ap, rap);
 948 #else
 949     _ap = rap;
 950 #endif
 951   }
 952 
 953  public:
 954   JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)
 955        : JNI_ArgumentPusher(signature) {
 956     set_ap(rap);
 957   }
 958   JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)
 959       : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
 960     set_ap(rap);
 961   }
 962 
 963   // Optimized path if we have the bitvector form of signature
 964   void iterate( uint64_t fingerprint ) {
 965     if (fingerprint == (uint64_t)CONST64(-1)) {
 966       SignatureIterator::iterate(); // Must be too many arguments
 967     } else {
 968       _return_type = (BasicType)((fingerprint >> static_feature_size) &
 969                                   result_feature_mask);
 970 
 971       assert(fingerprint, "Fingerprint should not be 0");
 972       fingerprint = fingerprint >> (static_feature_size + result_feature_size);
 973       while ( 1 ) {
 974         switch ( fingerprint & parameter_feature_mask ) {
 975           case bool_parm:
 976           case char_parm:
 977           case short_parm:
 978           case byte_parm:
 979           case int_parm:
 980             get_int();
 981             break;
 982           case obj_parm:
 983             get_object();
 984             break;
 985           case long_parm:
 986             get_long();
 987             break;
 988           case float_parm:
 989             get_float();
 990             break;
 991           case double_parm:
 992             get_double();
 993             break;
 994           case done_parm:
 995             return;
 996             break;
 997           default:
 998             ShouldNotReachHere();
 999             break;
1000         }
1001         fingerprint >>= parameter_feature_size;
1002       }
1003     }
1004   }
1005 };
1006 
1007 
1008 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {
1009  protected:
1010   const jvalue *_ap;
1011 
1012   inline void get_bool()   { _arguments->push_int((jint)(_ap++)->z); }
1013   inline void get_char()   { _arguments->push_int((jint)(_ap++)->c); }
1014   inline void get_short()  { _arguments->push_int((jint)(_ap++)->s); }
1015   inline void get_byte()   { _arguments->push_int((jint)(_ap++)->b); }
1016   inline void get_int()    { _arguments->push_int((jint)(_ap++)->i); }
1017 
1018   inline void get_long()   { _arguments->push_long((_ap++)->j);  }
1019   inline void get_float()  { _arguments->push_float((_ap++)->f); }
1020   inline void get_double() { _arguments->push_double((_ap++)->d);}
1021   inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); }
1022 
1023   inline void set_ap(const jvalue *rap) { _ap = rap; }
1024 
1025  public:
1026   JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)
1027        : JNI_ArgumentPusher(signature) {
1028     set_ap(rap);
1029   }
1030   JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)
1031       : JNI_ArgumentPusher(Method::resolve_jmethod_id(method_id)->signature()) {
1032     set_ap(rap);
1033   }
1034 
1035   // Optimized path if we have the bitvector form of signature
1036   void iterate( uint64_t fingerprint ) {
1037     if (fingerprint == (uint64_t)CONST64(-1)) {
1038       SignatureIterator::iterate(); // Must be too many arguments
1039     } else {
1040       _return_type = (BasicType)((fingerprint >> static_feature_size) &
1041                                   result_feature_mask);
1042       assert(fingerprint, "Fingerprint should not be 0");
1043       fingerprint = fingerprint >> (static_feature_size + result_feature_size);
1044       while ( 1 ) {
1045         switch ( fingerprint & parameter_feature_mask ) {
1046           case bool_parm:
1047             get_bool();
1048             break;
1049           case char_parm:
1050             get_char();
1051             break;
1052           case short_parm:
1053             get_short();
1054             break;
1055           case byte_parm:
1056             get_byte();
1057             break;
1058           case int_parm:
1059             get_int();
1060             break;
1061           case obj_parm:
1062             get_object();
1063             break;
1064           case long_parm:
1065             get_long();
1066             break;
1067           case float_parm:
1068             get_float();
1069             break;
1070           case double_parm:
1071             get_double();
1072             break;
1073           case done_parm:
1074             return;
1075             break;
1076           default:
1077             ShouldNotReachHere();
1078             break;
1079         }
1080         fingerprint >>= parameter_feature_size;
1081       }
1082     }
1083   }
1084 };
1085 
1086 
1087 enum JNICallType {
1088   JNI_STATIC,
1089   JNI_VIRTUAL,
1090   JNI_NONVIRTUAL
1091 };
1092 
1093 
1094 
1095 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1096   methodHandle method(THREAD, Method::resolve_jmethod_id(method_id));
1097 
1098   // Create object to hold arguments for the JavaCall, and associate it with
1099   // the jni parser
1100   ResourceMark rm(THREAD);
1101   int number_of_parameters = method->size_of_parameters();
1102   JavaCallArguments java_args(number_of_parameters);
1103   args->set_java_argument_object(&java_args);
1104 
1105   assert(method->is_static(), "method should be static");
1106 
1107   // Fill out JavaCallArguments object
1108   args->iterate( Fingerprinter(method).fingerprint() );
1109   // Initialize result type
1110   result->set_type(args->get_ret_type());
1111 
1112   // Invoke the method. Result is returned as oop.
1113   JavaCalls::call(result, method, &java_args, CHECK);
1114 
1115   // Convert result
1116   if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1117     result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1118   }
1119 }
1120 
1121 
1122 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {
1123   oop recv = JNIHandles::resolve(receiver);
1124   if (recv == NULL) {
1125     THROW(vmSymbols::java_lang_NullPointerException());
1126   }
1127   Handle h_recv(THREAD, recv);
1128 
1129   int number_of_parameters;
1130   Method* selected_method;
1131   {
1132     Method* m = Method::resolve_jmethod_id(method_id);
1133     number_of_parameters = m->size_of_parameters();
1134     Klass* holder = m->method_holder();
1135     if (call_type != JNI_VIRTUAL) {
1136         selected_method = m;
1137     } else if (!m->has_itable_index()) {
1138       // non-interface call -- for that little speed boost, don't handlize
1139       debug_only(No_Safepoint_Verifier nosafepoint;)
1140       // jni_GetMethodID makes sure class is linked and initialized
1141       // so m should have a valid vtable index.
1142       assert(m->valid_vtable_index(), "no valid vtable index");
1143       int vtbl_index = m->vtable_index();
1144       if (vtbl_index != Method::nonvirtual_vtable_index) {
1145         Klass* k = h_recv->klass();
1146         // k might be an arrayKlassOop but all vtables start at
1147         // the same place. The cast is to avoid virtual call and assertion.
1148         InstanceKlass *ik = (InstanceKlass*)k;
1149         selected_method = ik->method_at_vtable(vtbl_index);
1150       } else {
1151         // final method
1152         selected_method = m;
1153       }
1154     } else {
1155       // interface call
1156       KlassHandle h_holder(THREAD, holder);
1157 
1158       int itbl_index = m->itable_index();
1159       Klass* k = h_recv->klass();
1160       selected_method = InstanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK);
1161     }
1162   }
1163 
1164   methodHandle method(THREAD, selected_method);
1165 
1166   // Create object to hold arguments for the JavaCall, and associate it with
1167   // the jni parser
1168   ResourceMark rm(THREAD);
1169   JavaCallArguments java_args(number_of_parameters);
1170   args->set_java_argument_object(&java_args);
1171 
1172   // handle arguments
1173   assert(!method->is_static(), "method should not be static");
1174   args->push_receiver(h_recv); // Push jobject handle
1175 
1176   // Fill out JavaCallArguments object
1177   args->iterate( Fingerprinter(method).fingerprint() );
1178   // Initialize result type
1179   result->set_type(args->get_ret_type());
1180 
1181   // Invoke the method. Result is returned as oop.
1182   JavaCalls::call(result, method, &java_args, CHECK);
1183 
1184   // Convert result
1185   if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {
1186     result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));
1187   }
1188 }
1189 
1190 
1191 static instanceOop alloc_object(jclass clazz, TRAPS) {
1192   KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1193   if (k == NULL) {
1194     ResourceMark rm(THREAD);
1195     THROW_(vmSymbols::java_lang_InstantiationException(), NULL);
1196   }
1197   k()->check_valid_for_instantiation(false, CHECK_NULL);
1198   InstanceKlass::cast(k())->initialize(CHECK_NULL);
1199   instanceOop ih = InstanceKlass::cast(k())->allocate_instance(THREAD);
1200   return ih;
1201 }
1202 
1203 DT_RETURN_MARK_DECL(AllocObject, jobject
1204                     , HOTSPOT_JNI_ALLOCOBJECT_RETURN(_ret_ref));
1205 
1206 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))
1207   JNIWrapper("AllocObject");
1208 
1209   HOTSPOT_JNI_ALLOCOBJECT_ENTRY(env, clazz);
1210 
1211   jobject ret = NULL;
1212   DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);
1213 
1214   instanceOop i = alloc_object(clazz, CHECK_NULL);
1215   ret = JNIHandles::make_local(env, i);
1216   return ret;
1217 JNI_END
1218 
1219 DT_RETURN_MARK_DECL(NewObjectA, jobject
1220                     , HOTSPOT_JNI_NEWOBJECTA_RETURN(_ret_ref));
1221 
1222 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))
1223   JNIWrapper("NewObjectA");
1224 
1225   HOTSPOT_JNI_NEWOBJECTA_ENTRY(env, clazz, (uintptr_t) methodID);
1226 
1227   jobject obj = NULL;
1228   DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);
1229 
1230   instanceOop i = alloc_object(clazz, CHECK_NULL);
1231   obj = JNIHandles::make_local(env, i);
1232   JavaValue jvalue(T_VOID);
1233   JNI_ArgumentPusherArray ap(methodID, args);
1234   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1235   return obj;
1236 JNI_END
1237 
1238 
1239 DT_RETURN_MARK_DECL(NewObjectV, jobject
1240                     , HOTSPOT_JNI_NEWOBJECTV_RETURN(_ret_ref));
1241 
1242 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))
1243   JNIWrapper("NewObjectV");
1244 
1245   HOTSPOT_JNI_NEWOBJECTV_ENTRY(env, clazz, (uintptr_t) methodID);
1246 
1247   jobject obj = NULL;
1248   DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);
1249 
1250   instanceOop i = alloc_object(clazz, CHECK_NULL);
1251   obj = JNIHandles::make_local(env, i);
1252   JavaValue jvalue(T_VOID);
1253   JNI_ArgumentPusherVaArg ap(methodID, args);
1254   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1255   return obj;
1256 JNI_END
1257 
1258 
1259 DT_RETURN_MARK_DECL(NewObject, jobject
1260                     , HOTSPOT_JNI_NEWOBJECT_RETURN(_ret_ref));
1261 
1262 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))
1263   JNIWrapper("NewObject");
1264 
1265   HOTSPOT_JNI_NEWOBJECT_ENTRY(env, clazz, (uintptr_t) methodID);
1266 
1267   jobject obj = NULL;
1268   DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);
1269 
1270   instanceOop i = alloc_object(clazz, CHECK_NULL);
1271   obj = JNIHandles::make_local(env, i);
1272   va_list args;
1273   va_start(args, methodID);
1274   JavaValue jvalue(T_VOID);
1275   JNI_ArgumentPusherVaArg ap(methodID, args);
1276   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);
1277   va_end(args);
1278   return obj;
1279 JNI_END
1280 
1281 
1282 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))
1283   JNIWrapper("GetObjectClass");
1284 
1285   HOTSPOT_JNI_GETOBJECTCLASS_ENTRY(env, obj);
1286 
1287   Klass* k = JNIHandles::resolve_non_null(obj)->klass();
1288   jclass ret =
1289     (jclass) JNIHandles::make_local(env, k->java_mirror());
1290 
1291   HOTSPOT_JNI_GETOBJECTCLASS_RETURN(ret);
1292   return ret;
1293 JNI_END
1294 
1295 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))
1296   JNIWrapper("IsInstanceOf");
1297 
1298   HOTSPOT_JNI_ISINSTANCEOF_ENTRY(env, obj, clazz);
1299 
1300   jboolean ret = JNI_TRUE;
1301   if (obj != NULL) {
1302     ret = JNI_FALSE;
1303     Klass* k = java_lang_Class::as_Klass(
1304       JNIHandles::resolve_non_null(clazz));
1305     if (k != NULL) {
1306       ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;
1307     }
1308   }
1309 
1310   HOTSPOT_JNI_ISINSTANCEOF_RETURN(ret);
1311   return ret;
1312 JNI_END
1313 
1314 
1315 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,
1316                                const char *sig, bool is_static, TRAPS) {
1317   // %%%% This code should probably just call into a method in the LinkResolver
1318   //
1319   // The class should have been loaded (we have an instance of the class
1320   // passed in) so the method and signature should already be in the symbol
1321   // table.  If they're not there, the method doesn't exist.
1322   const char *name_to_probe = (name_str == NULL)
1323                         ? vmSymbols::object_initializer_name()->as_C_string()
1324                         : name_str;
1325   TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));
1326   TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));
1327 
1328   if (name == NULL || signature == NULL) {
1329     THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1330   }
1331 
1332   // Throw a NoSuchMethodError exception if we have an instance of a
1333   // primitive java.lang.Class
1334   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {
1335     THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1336   }
1337 
1338   KlassHandle klass(THREAD,
1339                java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
1340 
1341   // Make sure class is linked and initialized before handing id's out to
1342   // Method*s.
1343   klass()->initialize(CHECK_NULL);
1344 
1345   Method* m;
1346   if (name == vmSymbols::object_initializer_name() ||
1347       name == vmSymbols::class_initializer_name()) {
1348     // Never search superclasses for constructors
1349     if (klass->oop_is_instance()) {
1350       m = InstanceKlass::cast(klass())->find_method(name, signature);
1351     } else {
1352       m = NULL;
1353     }
1354   } else {
1355     m = klass->lookup_method(name, signature);
1356     if (m == NULL &&  klass->oop_is_instance()) {
1357       m = InstanceKlass::cast(klass())->lookup_method_in_ordered_interfaces(name, signature);
1358     }
1359   }
1360   if (m == NULL || (m->is_static() != is_static)) {
1361     THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);
1362   }
1363   return m->jmethod_id();
1364 }
1365 
1366 
1367 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,
1368           const char *name, const char *sig))
1369   JNIWrapper("GetMethodID");
1370   HOTSPOT_JNI_GETMETHODID_ENTRY(env, clazz, (char *) name, (char *) sig);
1371   jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);
1372   HOTSPOT_JNI_GETMETHODID_RETURN((uintptr_t) ret);
1373   return ret;
1374 JNI_END
1375 
1376 
1377 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,
1378           const char *name, const char *sig))
1379   JNIWrapper("GetStaticMethodID");
1380   HOTSPOT_JNI_GETSTATICMETHODID_ENTRY(env, (char *) clazz, (char *) name, (char *)sig);
1381   jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);
1382   HOTSPOT_JNI_GETSTATICMETHODID_RETURN((uintptr_t) ret);
1383   return ret;
1384 JNI_END
1385 
1386 
1387 
1388 //
1389 // Calling Methods
1390 //
1391 
1392 
1393 #define DEFINE_CALLMETHOD(ResultType, Result, Tag \
1394                           , EntryProbe, ReturnProbe)    \
1395 \
1396   DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType \
1397                           , ReturnProbe);                          \
1398 \
1399 JNI_ENTRY(ResultType, \
1400           jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \
1401   JNIWrapper("Call" XSTR(Result) "Method"); \
1402 \
1403   EntryProbe; \
1404   ResultType ret = 0;\
1405   DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \
1406                      (const ResultType&)ret);\
1407 \
1408   va_list args; \
1409   va_start(args, methodID); \
1410   JavaValue jvalue(Tag); \
1411   JNI_ArgumentPusherVaArg ap(methodID, args); \
1412   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1413   va_end(args); \
1414   ret = jvalue.get_##ResultType(); \
1415   return ret;\
1416 JNI_END
1417 
1418 // the runtime type of subword integral basic types is integer
1419 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN
1420                   , HOTSPOT_JNI_CALLBOOLEANMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1421                   HOTSPOT_JNI_CALLBOOLEANMETHOD_RETURN(_ret_ref))
1422 DEFINE_CALLMETHOD(jbyte,    Byte,    T_BYTE
1423                   , HOTSPOT_JNI_CALLBYTEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1424                   HOTSPOT_JNI_CALLBYTEMETHOD_RETURN(_ret_ref))
1425 DEFINE_CALLMETHOD(jchar,    Char,    T_CHAR
1426                   , HOTSPOT_JNI_CALLCHARMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1427                   HOTSPOT_JNI_CALLCHARMETHOD_RETURN(_ret_ref))
1428 DEFINE_CALLMETHOD(jshort,   Short,   T_SHORT
1429                   , HOTSPOT_JNI_CALLSHORTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1430                   HOTSPOT_JNI_CALLSHORTMETHOD_RETURN(_ret_ref))
1431 
1432 DEFINE_CALLMETHOD(jobject,  Object,  T_OBJECT
1433                   , HOTSPOT_JNI_CALLOBJECTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1434                   HOTSPOT_JNI_CALLOBJECTMETHOD_RETURN(_ret_ref))
1435 DEFINE_CALLMETHOD(jint,     Int,     T_INT,
1436                   HOTSPOT_JNI_CALLINTMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1437                   HOTSPOT_JNI_CALLINTMETHOD_RETURN(_ret_ref))
1438 DEFINE_CALLMETHOD(jlong,    Long,    T_LONG
1439                   , HOTSPOT_JNI_CALLLONGMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1440                   HOTSPOT_JNI_CALLLONGMETHOD_RETURN(_ret_ref))
1441 // Float and double probes don't return value because dtrace doesn't currently support it
1442 DEFINE_CALLMETHOD(jfloat,   Float,   T_FLOAT
1443                   , HOTSPOT_JNI_CALLFLOATMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1444                   HOTSPOT_JNI_CALLFLOATMETHOD_RETURN())
1445 DEFINE_CALLMETHOD(jdouble,  Double,  T_DOUBLE
1446                   , HOTSPOT_JNI_CALLDOUBLEMETHOD_ENTRY(env, obj, (uintptr_t)methodID),
1447                   HOTSPOT_JNI_CALLDOUBLEMETHOD_RETURN())
1448 
1449 #define DEFINE_CALLMETHODV(ResultType, Result, Tag \
1450                           , EntryProbe, ReturnProbe)    \
1451 \
1452   DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType \
1453                           , ReturnProbe);                          \
1454 \
1455 JNI_ENTRY(ResultType, \
1456           jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \
1457   JNIWrapper("Call" XSTR(Result) "MethodV"); \
1458 \
1459   EntryProbe;\
1460   ResultType ret = 0;\
1461   DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \
1462                      (const ResultType&)ret);\
1463 \
1464   JavaValue jvalue(Tag); \
1465   JNI_ArgumentPusherVaArg ap(methodID, args); \
1466   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1467   ret = jvalue.get_##ResultType(); \
1468   return ret;\
1469 JNI_END
1470 
1471 // the runtime type of subword integral basic types is integer
1472 DEFINE_CALLMETHODV(jboolean, Boolean, T_BOOLEAN
1473                   , HOTSPOT_JNI_CALLBOOLEANMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1474                   HOTSPOT_JNI_CALLBOOLEANMETHODV_RETURN(_ret_ref))
1475 DEFINE_CALLMETHODV(jbyte,    Byte,    T_BYTE
1476                   , HOTSPOT_JNI_CALLBYTEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1477                   HOTSPOT_JNI_CALLBYTEMETHODV_RETURN(_ret_ref))
1478 DEFINE_CALLMETHODV(jchar,    Char,    T_CHAR
1479                   , HOTSPOT_JNI_CALLCHARMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1480                   HOTSPOT_JNI_CALLCHARMETHODV_RETURN(_ret_ref))
1481 DEFINE_CALLMETHODV(jshort,   Short,   T_SHORT
1482                   , HOTSPOT_JNI_CALLSHORTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1483                   HOTSPOT_JNI_CALLSHORTMETHODV_RETURN(_ret_ref))
1484 
1485 DEFINE_CALLMETHODV(jobject,  Object,  T_OBJECT
1486                   , HOTSPOT_JNI_CALLOBJECTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1487                   HOTSPOT_JNI_CALLOBJECTMETHODV_RETURN(_ret_ref))
1488 DEFINE_CALLMETHODV(jint,     Int,     T_INT,
1489                   HOTSPOT_JNI_CALLINTMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1490                   HOTSPOT_JNI_CALLINTMETHODV_RETURN(_ret_ref))
1491 DEFINE_CALLMETHODV(jlong,    Long,    T_LONG
1492                   , HOTSPOT_JNI_CALLLONGMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1493                   HOTSPOT_JNI_CALLLONGMETHODV_RETURN(_ret_ref))
1494 // Float and double probes don't return value because dtrace doesn't currently support it
1495 DEFINE_CALLMETHODV(jfloat,   Float,   T_FLOAT
1496                   , HOTSPOT_JNI_CALLFLOATMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1497                   HOTSPOT_JNI_CALLFLOATMETHODV_RETURN())
1498 DEFINE_CALLMETHODV(jdouble,  Double,  T_DOUBLE
1499                   , HOTSPOT_JNI_CALLDOUBLEMETHODV_ENTRY(env, obj, (uintptr_t)methodID),
1500                   HOTSPOT_JNI_CALLDOUBLEMETHODV_RETURN())
1501 
1502 #define DEFINE_CALLMETHODA(ResultType, Result, Tag \
1503                           , EntryProbe, ReturnProbe)    \
1504 \
1505   DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType \
1506                           , ReturnProbe);                          \
1507 \
1508 JNI_ENTRY(ResultType, \
1509           jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \
1510   JNIWrapper("Call" XSTR(Result) "MethodA"); \
1511   EntryProbe; \
1512   ResultType ret = 0;\
1513   DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \
1514                      (const ResultType&)ret);\
1515 \
1516   JavaValue jvalue(Tag); \
1517   JNI_ArgumentPusherArray ap(methodID, args); \
1518   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \
1519   ret = jvalue.get_##ResultType(); \
1520   return ret;\
1521 JNI_END
1522 
1523 // the runtime type of subword integral basic types is integer
1524 DEFINE_CALLMETHODA(jboolean, Boolean, T_BOOLEAN
1525                   , HOTSPOT_JNI_CALLBOOLEANMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1526                   HOTSPOT_JNI_CALLBOOLEANMETHODA_RETURN(_ret_ref))
1527 DEFINE_CALLMETHODA(jbyte,    Byte,    T_BYTE
1528                   , HOTSPOT_JNI_CALLBYTEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1529                   HOTSPOT_JNI_CALLBYTEMETHODA_RETURN(_ret_ref))
1530 DEFINE_CALLMETHODA(jchar,    Char,    T_CHAR
1531                   , HOTSPOT_JNI_CALLCHARMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1532                   HOTSPOT_JNI_CALLCHARMETHODA_RETURN(_ret_ref))
1533 DEFINE_CALLMETHODA(jshort,   Short,   T_SHORT
1534                   , HOTSPOT_JNI_CALLSHORTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1535                   HOTSPOT_JNI_CALLSHORTMETHODA_RETURN(_ret_ref))
1536 
1537 DEFINE_CALLMETHODA(jobject,  Object,  T_OBJECT
1538                   , HOTSPOT_JNI_CALLOBJECTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1539                   HOTSPOT_JNI_CALLOBJECTMETHODA_RETURN(_ret_ref))
1540 DEFINE_CALLMETHODA(jint,     Int,     T_INT,
1541                   HOTSPOT_JNI_CALLINTMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1542                   HOTSPOT_JNI_CALLINTMETHODA_RETURN(_ret_ref))
1543 DEFINE_CALLMETHODA(jlong,    Long,    T_LONG
1544                   , HOTSPOT_JNI_CALLLONGMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1545                   HOTSPOT_JNI_CALLLONGMETHODA_RETURN(_ret_ref))
1546 // Float and double probes don't return value because dtrace doesn't currently support it
1547 DEFINE_CALLMETHODA(jfloat,   Float,   T_FLOAT
1548                   , HOTSPOT_JNI_CALLFLOATMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1549                   HOTSPOT_JNI_CALLFLOATMETHODA_RETURN())
1550 DEFINE_CALLMETHODA(jdouble,  Double,  T_DOUBLE
1551                   , HOTSPOT_JNI_CALLDOUBLEMETHODA_ENTRY(env, obj, (uintptr_t)methodID),
1552                   HOTSPOT_JNI_CALLDOUBLEMETHODA_RETURN())
1553 
1554 DT_VOID_RETURN_MARK_DECL(CallVoidMethod, HOTSPOT_JNI_CALLVOIDMETHOD_RETURN());
1555 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV, HOTSPOT_JNI_CALLVOIDMETHODV_RETURN());
1556 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA, HOTSPOT_JNI_CALLVOIDMETHODA_RETURN());
1557 
1558 
1559 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))
1560   JNIWrapper("CallVoidMethod");
1561   HOTSPOT_JNI_CALLVOIDMETHOD_ENTRY(env, obj, (uintptr_t) methodID);
1562   DT_VOID_RETURN_MARK(CallVoidMethod);
1563 
1564   va_list args;
1565   va_start(args, methodID);
1566   JavaValue jvalue(T_VOID);
1567   JNI_ArgumentPusherVaArg ap(methodID, args);
1568   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1569   va_end(args);
1570 JNI_END
1571 
1572 
1573 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))
1574   JNIWrapper("CallVoidMethodV");
1575   HOTSPOT_JNI_CALLVOIDMETHODV_ENTRY(env, obj, (uintptr_t) methodID);
1576   DT_VOID_RETURN_MARK(CallVoidMethodV);
1577 
1578   JavaValue jvalue(T_VOID);
1579   JNI_ArgumentPusherVaArg ap(methodID, args);
1580   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1581 JNI_END
1582 
1583 
1584 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))
1585   JNIWrapper("CallVoidMethodA");
1586   HOTSPOT_JNI_CALLVOIDMETHODA_ENTRY(env, obj, (uintptr_t) methodID);
1587   DT_VOID_RETURN_MARK(CallVoidMethodA);
1588 
1589   JavaValue jvalue(T_VOID);
1590   JNI_ArgumentPusherArray ap(methodID, args);
1591   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);
1592 JNI_END
1593 
1594 
1595 
1596 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag \
1597                                     , EntryProbe, ReturnProbe)      \
1598 \
1599   DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType \
1600                           , ReturnProbe);\
1601 \
1602 JNI_ENTRY(ResultType, \
1603           jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \
1604   JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \
1605 \
1606   EntryProbe;\
1607   ResultType ret;\
1608   DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \
1609                      (const ResultType&)ret);\
1610 \
1611   va_list args; \
1612   va_start(args, methodID); \
1613   JavaValue jvalue(Tag); \
1614   JNI_ArgumentPusherVaArg ap(methodID, args); \
1615   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1616   va_end(args); \
1617   ret = jvalue.get_##ResultType(); \
1618   return ret;\
1619 JNI_END
1620 
1621 // the runtime type of subword integral basic types is integer
1622 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN
1623                             , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1624                             HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHOD_RETURN(_ret_ref))
1625 DEFINE_CALLNONVIRTUALMETHOD(jbyte,    Byte,    T_BYTE
1626                             , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1627                             HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHOD_RETURN(_ret_ref))
1628 DEFINE_CALLNONVIRTUALMETHOD(jchar,    Char,    T_CHAR
1629                             , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1630                             HOTSPOT_JNI_CALLNONVIRTUALCHARMETHOD_RETURN(_ret_ref))
1631 DEFINE_CALLNONVIRTUALMETHOD(jshort,   Short,   T_SHORT
1632                             , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1633                             HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHOD_RETURN(_ret_ref))
1634 
1635 DEFINE_CALLNONVIRTUALMETHOD(jobject,  Object,  T_OBJECT
1636                             , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1637                             HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHOD_RETURN(_ret_ref))
1638 DEFINE_CALLNONVIRTUALMETHOD(jint,     Int,     T_INT
1639                             , HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1640                             HOTSPOT_JNI_CALLNONVIRTUALINTMETHOD_RETURN(_ret_ref))
1641 DEFINE_CALLNONVIRTUALMETHOD(jlong,    Long,    T_LONG
1642                             , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1643 // Float and double probes don't return value because dtrace doesn't currently support it
1644                             HOTSPOT_JNI_CALLNONVIRTUALLONGMETHOD_RETURN(_ret_ref))
1645 DEFINE_CALLNONVIRTUALMETHOD(jfloat,   Float,   T_FLOAT
1646                             , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1647                             HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHOD_RETURN())
1648 DEFINE_CALLNONVIRTUALMETHOD(jdouble,  Double,  T_DOUBLE
1649                             , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_ENTRY(env, obj, cls, (uintptr_t)methodID),
1650                             HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHOD_RETURN())
1651 
1652 #define DEFINE_CALLNONVIRTUALMETHODV(ResultType, Result, Tag \
1653                                     , EntryProbe, ReturnProbe)      \
1654 \
1655   DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType \
1656                           , ReturnProbe);\
1657 \
1658 JNI_ENTRY(ResultType, \
1659           jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \
1660   JNIWrapper("CallNonvitual" XSTR(Result) "MethodV"); \
1661 \
1662   EntryProbe;\
1663   ResultType ret;\
1664   DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \
1665                      (const ResultType&)ret);\
1666 \
1667   JavaValue jvalue(Tag); \
1668   JNI_ArgumentPusherVaArg ap(methodID, args); \
1669   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1670   ret = jvalue.get_##ResultType(); \
1671   return ret;\
1672 JNI_END
1673 
1674 // the runtime type of subword integral basic types is integer
1675 DEFINE_CALLNONVIRTUALMETHODV(jboolean, Boolean, T_BOOLEAN
1676                             , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1677                             HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODV_RETURN(_ret_ref))
1678 DEFINE_CALLNONVIRTUALMETHODV(jbyte,    Byte,    T_BYTE
1679                             , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1680                             HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODV_RETURN(_ret_ref))
1681 DEFINE_CALLNONVIRTUALMETHODV(jchar,    Char,    T_CHAR
1682                             , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1683                             HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODV_RETURN(_ret_ref))
1684 DEFINE_CALLNONVIRTUALMETHODV(jshort,   Short,   T_SHORT
1685                             , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1686                             HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODV_RETURN(_ret_ref))
1687 
1688 DEFINE_CALLNONVIRTUALMETHODV(jobject,  Object,  T_OBJECT
1689                             , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1690                             HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODV_RETURN(_ret_ref))
1691 DEFINE_CALLNONVIRTUALMETHODV(jint,     Int,     T_INT
1692                             , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1693                             HOTSPOT_JNI_CALLNONVIRTUALINTMETHODV_RETURN(_ret_ref))
1694 DEFINE_CALLNONVIRTUALMETHODV(jlong,    Long,    T_LONG
1695                             , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1696 // Float and double probes don't return value because dtrace doesn't currently support it
1697                             HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODV_RETURN(_ret_ref))
1698 DEFINE_CALLNONVIRTUALMETHODV(jfloat,   Float,   T_FLOAT
1699                             , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1700                             HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODV_RETURN())
1701 DEFINE_CALLNONVIRTUALMETHODV(jdouble,  Double,  T_DOUBLE
1702                             , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_ENTRY(env, obj, cls, (uintptr_t)methodID),
1703                             HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODV_RETURN())
1704 
1705 #define DEFINE_CALLNONVIRTUALMETHODA(ResultType, Result, Tag \
1706                                     , EntryProbe, ReturnProbe)      \
1707 \
1708   DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType \
1709                           , ReturnProbe);\
1710 \
1711 JNI_ENTRY(ResultType, \
1712           jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \
1713   JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \
1714 \
1715   EntryProbe;\
1716   ResultType ret;\
1717   DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \
1718                      (const ResultType&)ret);\
1719 \
1720   JavaValue jvalue(Tag); \
1721   JNI_ArgumentPusherArray ap(methodID, args); \
1722   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \
1723   ret = jvalue.get_##ResultType(); \
1724   return ret;\
1725 JNI_END
1726 
1727 // the runtime type of subword integral basic types is integer
1728 DEFINE_CALLNONVIRTUALMETHODA(jboolean, Boolean, T_BOOLEAN
1729                             , HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1730                             HOTSPOT_JNI_CALLNONVIRTUALBOOLEANMETHODA_RETURN(_ret_ref))
1731 DEFINE_CALLNONVIRTUALMETHODA(jbyte,    Byte,    T_BYTE
1732                             , HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1733                             HOTSPOT_JNI_CALLNONVIRTUALBYTEMETHODA_RETURN(_ret_ref))
1734 DEFINE_CALLNONVIRTUALMETHODA(jchar,    Char,    T_CHAR
1735                             , HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1736                             HOTSPOT_JNI_CALLNONVIRTUALCHARMETHODA_RETURN(_ret_ref))
1737 DEFINE_CALLNONVIRTUALMETHODA(jshort,   Short,   T_SHORT
1738                             , HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1739                             HOTSPOT_JNI_CALLNONVIRTUALSHORTMETHODA_RETURN(_ret_ref))
1740 
1741 DEFINE_CALLNONVIRTUALMETHODA(jobject,  Object,  T_OBJECT
1742                             , HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1743                             HOTSPOT_JNI_CALLNONVIRTUALOBJECTMETHODA_RETURN(_ret_ref))
1744 DEFINE_CALLNONVIRTUALMETHODA(jint,     Int,     T_INT
1745                             , HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1746                             HOTSPOT_JNI_CALLNONVIRTUALINTMETHODA_RETURN(_ret_ref))
1747 DEFINE_CALLNONVIRTUALMETHODA(jlong,    Long,    T_LONG
1748                             , HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1749 // Float and double probes don't return value because dtrace doesn't currently support it
1750                             HOTSPOT_JNI_CALLNONVIRTUALLONGMETHODA_RETURN(_ret_ref))
1751 DEFINE_CALLNONVIRTUALMETHODA(jfloat,   Float,   T_FLOAT
1752                             , HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1753                             HOTSPOT_JNI_CALLNONVIRTUALFLOATMETHODA_RETURN())
1754 DEFINE_CALLNONVIRTUALMETHODA(jdouble,  Double,  T_DOUBLE
1755                             , HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_ENTRY(env, obj, cls, (uintptr_t)methodID),
1756                             HOTSPOT_JNI_CALLNONVIRTUALDOUBLEMETHODA_RETURN())
1757 
1758 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod
1759                          , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_RETURN());
1760 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV
1761                          , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_RETURN());
1762 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA
1763                          , HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_RETURN());
1764 
1765 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))
1766   JNIWrapper("CallNonvirtualVoidMethod");
1767 
1768   HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHOD_ENTRY(env, obj, cls, (uintptr_t) methodID);
1769   DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);
1770 
1771   va_list args;
1772   va_start(args, methodID);
1773   JavaValue jvalue(T_VOID);
1774   JNI_ArgumentPusherVaArg ap(methodID, args);
1775   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1776   va_end(args);
1777 JNI_END
1778 
1779 
1780 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))
1781   JNIWrapper("CallNonvirtualVoidMethodV");
1782 
1783   HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODV_ENTRY(
1784                env, obj, cls, (uintptr_t) methodID);
1785   DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);
1786 
1787   JavaValue jvalue(T_VOID);
1788   JNI_ArgumentPusherVaArg ap(methodID, args);
1789   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1790 JNI_END
1791 
1792 
1793 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))
1794   JNIWrapper("CallNonvirtualVoidMethodA");
1795   HOTSPOT_JNI_CALLNONVIRTUALVOIDMETHODA_ENTRY(
1796                 env, obj, cls, (uintptr_t) methodID);
1797   DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);
1798   JavaValue jvalue(T_VOID);
1799   JNI_ArgumentPusherArray ap(methodID, args);
1800   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);
1801 JNI_END
1802 
1803 
1804 
1805 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag \
1806                                 , EntryProbe, ResultProbe) \
1807 \
1808   DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType \
1809                           , ResultProbe);                               \
1810 \
1811 JNI_ENTRY(ResultType, \
1812           jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \
1813   JNIWrapper("CallStatic" XSTR(Result) "Method"); \
1814 \
1815   EntryProbe; \
1816   ResultType ret = 0;\
1817   DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \
1818                      (const ResultType&)ret);\
1819 \
1820   va_list args; \
1821   va_start(args, methodID); \
1822   JavaValue jvalue(Tag); \
1823   JNI_ArgumentPusherVaArg ap(methodID, args); \
1824   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1825   va_end(args); \
1826   ret = jvalue.get_##ResultType(); \
1827   return ret;\
1828 JNI_END
1829 
1830 // the runtime type of subword integral basic types is integer
1831 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN
1832                         , HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1833                         HOTSPOT_JNI_CALLSTATICBOOLEANMETHOD_RETURN(_ret_ref));
1834 DEFINE_CALLSTATICMETHOD(jbyte,    Byte,    T_BYTE
1835                         , HOTSPOT_JNI_CALLSTATICBYTEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1836                         HOTSPOT_JNI_CALLSTATICBYTEMETHOD_RETURN(_ret_ref));
1837 DEFINE_CALLSTATICMETHOD(jchar,    Char,    T_CHAR
1838                         , HOTSPOT_JNI_CALLSTATICCHARMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1839                         HOTSPOT_JNI_CALLSTATICCHARMETHOD_RETURN(_ret_ref));
1840 DEFINE_CALLSTATICMETHOD(jshort,   Short,   T_SHORT
1841                         , HOTSPOT_JNI_CALLSTATICSHORTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1842                         HOTSPOT_JNI_CALLSTATICSHORTMETHOD_RETURN(_ret_ref));
1843 
1844 DEFINE_CALLSTATICMETHOD(jobject,  Object,  T_OBJECT
1845                         , HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1846                         HOTSPOT_JNI_CALLSTATICOBJECTMETHOD_RETURN(_ret_ref));
1847 DEFINE_CALLSTATICMETHOD(jint,     Int,     T_INT
1848                         , HOTSPOT_JNI_CALLSTATICINTMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1849                         HOTSPOT_JNI_CALLSTATICINTMETHOD_RETURN(_ret_ref));
1850 DEFINE_CALLSTATICMETHOD(jlong,    Long,    T_LONG
1851                         , HOTSPOT_JNI_CALLSTATICLONGMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1852                         HOTSPOT_JNI_CALLSTATICLONGMETHOD_RETURN(_ret_ref));
1853 // Float and double probes don't return value because dtrace doesn't currently support it
1854 DEFINE_CALLSTATICMETHOD(jfloat,   Float,   T_FLOAT
1855                         , HOTSPOT_JNI_CALLSTATICFLOATMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1856                         HOTSPOT_JNI_CALLSTATICFLOATMETHOD_RETURN());
1857 DEFINE_CALLSTATICMETHOD(jdouble,  Double,  T_DOUBLE
1858                         , HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_ENTRY(env, cls, (uintptr_t)methodID),
1859                         HOTSPOT_JNI_CALLSTATICDOUBLEMETHOD_RETURN());
1860 
1861 #define DEFINE_CALLSTATICMETHODV(ResultType, Result, Tag \
1862                                 , EntryProbe, ResultProbe) \
1863 \
1864   DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType \
1865                           , ResultProbe);                               \
1866 \
1867 JNI_ENTRY(ResultType, \
1868           jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \
1869   JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \
1870 \
1871   EntryProbe; \
1872   ResultType ret = 0;\
1873   DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \
1874                      (const ResultType&)ret);\
1875 \
1876   JavaValue jvalue(Tag); \
1877   JNI_ArgumentPusherVaArg ap(methodID, args); \
1878   /* Make sure class is initialized before trying to invoke its method */ \
1879   KlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls))); \
1880   k()->initialize(CHECK_0); \
1881   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1882   va_end(args); \
1883   ret = jvalue.get_##ResultType(); \
1884   return ret;\
1885 JNI_END
1886 
1887 // the runtime type of subword integral basic types is integer
1888 DEFINE_CALLSTATICMETHODV(jboolean, Boolean, T_BOOLEAN
1889                         , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1890                         HOTSPOT_JNI_CALLSTATICBOOLEANMETHODV_RETURN(_ret_ref));
1891 DEFINE_CALLSTATICMETHODV(jbyte,    Byte,    T_BYTE
1892                         , HOTSPOT_JNI_CALLSTATICBYTEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1893                         HOTSPOT_JNI_CALLSTATICBYTEMETHODV_RETURN(_ret_ref));
1894 DEFINE_CALLSTATICMETHODV(jchar,    Char,    T_CHAR
1895                         , HOTSPOT_JNI_CALLSTATICCHARMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1896                         HOTSPOT_JNI_CALLSTATICCHARMETHODV_RETURN(_ret_ref));
1897 DEFINE_CALLSTATICMETHODV(jshort,   Short,   T_SHORT
1898                         , HOTSPOT_JNI_CALLSTATICSHORTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1899                         HOTSPOT_JNI_CALLSTATICSHORTMETHODV_RETURN(_ret_ref));
1900 
1901 DEFINE_CALLSTATICMETHODV(jobject,  Object,  T_OBJECT
1902                         , HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1903                         HOTSPOT_JNI_CALLSTATICOBJECTMETHODV_RETURN(_ret_ref));
1904 DEFINE_CALLSTATICMETHODV(jint,     Int,     T_INT
1905                         , HOTSPOT_JNI_CALLSTATICINTMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1906                         HOTSPOT_JNI_CALLSTATICINTMETHODV_RETURN(_ret_ref));
1907 DEFINE_CALLSTATICMETHODV(jlong,    Long,    T_LONG
1908                         , HOTSPOT_JNI_CALLSTATICLONGMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1909                         HOTSPOT_JNI_CALLSTATICLONGMETHODV_RETURN(_ret_ref));
1910 // Float and double probes don't return value because dtrace doesn't currently support it
1911 DEFINE_CALLSTATICMETHODV(jfloat,   Float,   T_FLOAT
1912                         , HOTSPOT_JNI_CALLSTATICFLOATMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1913                         HOTSPOT_JNI_CALLSTATICFLOATMETHODV_RETURN());
1914 DEFINE_CALLSTATICMETHODV(jdouble,  Double,  T_DOUBLE
1915                         , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_ENTRY(env, cls, (uintptr_t)methodID),
1916                         HOTSPOT_JNI_CALLSTATICDOUBLEMETHODV_RETURN());
1917 
1918 #define DEFINE_CALLSTATICMETHODA(ResultType, Result, Tag \
1919                                 , EntryProbe, ResultProbe) \
1920 \
1921   DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType \
1922                           , ResultProbe);                               \
1923 \
1924 JNI_ENTRY(ResultType, \
1925           jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \
1926   JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \
1927 \
1928   EntryProbe; \
1929   ResultType ret = 0;\
1930   DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \
1931                      (const ResultType&)ret);\
1932 \
1933   JavaValue jvalue(Tag); \
1934   JNI_ArgumentPusherArray ap(methodID, args); \
1935   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \
1936   ret = jvalue.get_##ResultType(); \
1937   return ret;\
1938 JNI_END
1939 
1940 // the runtime type of subword integral basic types is integer
1941 DEFINE_CALLSTATICMETHODA(jboolean, Boolean, T_BOOLEAN
1942                         , HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1943                         HOTSPOT_JNI_CALLSTATICBOOLEANMETHODA_RETURN(_ret_ref));
1944 DEFINE_CALLSTATICMETHODA(jbyte,    Byte,    T_BYTE
1945                         , HOTSPOT_JNI_CALLSTATICBYTEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1946                         HOTSPOT_JNI_CALLSTATICBYTEMETHODA_RETURN(_ret_ref));
1947 DEFINE_CALLSTATICMETHODA(jchar,    Char,    T_CHAR
1948                         , HOTSPOT_JNI_CALLSTATICCHARMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1949                         HOTSPOT_JNI_CALLSTATICCHARMETHODA_RETURN(_ret_ref));
1950 DEFINE_CALLSTATICMETHODA(jshort,   Short,   T_SHORT
1951                         , HOTSPOT_JNI_CALLSTATICSHORTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1952                         HOTSPOT_JNI_CALLSTATICSHORTMETHODA_RETURN(_ret_ref));
1953 
1954 DEFINE_CALLSTATICMETHODA(jobject,  Object,  T_OBJECT
1955                         , HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1956                         HOTSPOT_JNI_CALLSTATICOBJECTMETHODA_RETURN(_ret_ref));
1957 DEFINE_CALLSTATICMETHODA(jint,     Int,     T_INT
1958                         , HOTSPOT_JNI_CALLSTATICINTMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1959                         HOTSPOT_JNI_CALLSTATICINTMETHODA_RETURN(_ret_ref));
1960 DEFINE_CALLSTATICMETHODA(jlong,    Long,    T_LONG
1961                         , HOTSPOT_JNI_CALLSTATICLONGMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1962                         HOTSPOT_JNI_CALLSTATICLONGMETHODA_RETURN(_ret_ref));
1963 // Float and double probes don't return value because dtrace doesn't currently support it
1964 DEFINE_CALLSTATICMETHODA(jfloat,   Float,   T_FLOAT
1965                         , HOTSPOT_JNI_CALLSTATICFLOATMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1966                         HOTSPOT_JNI_CALLSTATICFLOATMETHODA_RETURN());
1967 DEFINE_CALLSTATICMETHODA(jdouble,  Double,  T_DOUBLE
1968                         , HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_ENTRY(env, cls, (uintptr_t)methodID),
1969                         HOTSPOT_JNI_CALLSTATICDOUBLEMETHODA_RETURN());
1970 
1971 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod
1972                          , HOTSPOT_JNI_CALLSTATICVOIDMETHOD_RETURN());
1973 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV
1974                          , HOTSPOT_JNI_CALLSTATICVOIDMETHODV_RETURN());
1975 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA
1976                          , HOTSPOT_JNI_CALLSTATICVOIDMETHODA_RETURN());
1977 
1978 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))
1979   JNIWrapper("CallStaticVoidMethod");
1980   HOTSPOT_JNI_CALLSTATICVOIDMETHOD_ENTRY(env, cls, (uintptr_t) methodID);
1981   DT_VOID_RETURN_MARK(CallStaticVoidMethod);
1982 
1983   va_list args;
1984   va_start(args, methodID);
1985   JavaValue jvalue(T_VOID);
1986   JNI_ArgumentPusherVaArg ap(methodID, args);
1987   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
1988   va_end(args);
1989 JNI_END
1990 
1991 
1992 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))
1993   JNIWrapper("CallStaticVoidMethodV");
1994   HOTSPOT_JNI_CALLSTATICVOIDMETHODV_ENTRY(env, cls, (uintptr_t) methodID);
1995   DT_VOID_RETURN_MARK(CallStaticVoidMethodV);
1996 
1997   JavaValue jvalue(T_VOID);
1998   JNI_ArgumentPusherVaArg ap(methodID, args);
1999   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2000 JNI_END
2001 
2002 
2003 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))
2004   JNIWrapper("CallStaticVoidMethodA");
2005   HOTSPOT_JNI_CALLSTATICVOIDMETHODA_ENTRY(env, cls, (uintptr_t) methodID);
2006   DT_VOID_RETURN_MARK(CallStaticVoidMethodA);
2007 
2008   JavaValue jvalue(T_VOID);
2009   JNI_ArgumentPusherArray ap(methodID, args);
2010   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);
2011 JNI_END
2012 
2013 
2014 //
2015 // Accessing Fields
2016 //
2017 
2018 
2019 DT_RETURN_MARK_DECL(GetFieldID, jfieldID
2020                     , HOTSPOT_JNI_GETFIELDID_RETURN((uintptr_t)_ret_ref));
2021 
2022 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,
2023           const char *name, const char *sig))
2024   JNIWrapper("GetFieldID");
2025   HOTSPOT_JNI_GETFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2026   jfieldID ret = 0;
2027   DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);
2028 
2029   // The class should have been loaded (we have an instance of the class
2030   // passed in) so the field and signature should already be in the symbol
2031   // table.  If they're not there, the field doesn't exist.
2032   TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2033   TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2034   if (fieldname == NULL || signame == NULL) {
2035     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2036   }
2037   KlassHandle k(THREAD,
2038                 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2039   // Make sure class is initialized before handing id's out to fields
2040   k()->initialize(CHECK_NULL);
2041 
2042   fieldDescriptor fd;
2043   if (!k()->oop_is_instance() ||
2044       !InstanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) {
2045     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2046   }
2047 
2048   // A jfieldID for a non-static field is simply the offset of the field within the instanceOop
2049   // It may also have hash bits for k, if VerifyJNIFields is turned on.
2050   ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset());
2051   return ret;
2052 JNI_END
2053 
2054 
2055 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))
2056   JNIWrapper("GetObjectField");
2057   HOTSPOT_JNI_GETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID);
2058   oop o = JNIHandles::resolve_non_null(obj);
2059   Klass* k = o->klass();
2060   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2061   // Keep JVMTI addition small and only check enabled flag here.
2062   // jni_GetField_probe() assumes that is okay to create handles.
2063   if (JvmtiExport::should_post_field_access()) {
2064     o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);
2065   }
2066   jobject ret = JNIHandles::make_local(env, o->obj_field(offset));
2067 #if INCLUDE_ALL_GCS
2068   // If G1 is enabled and we are accessing the value of the referent
2069   // field in a reference object then we need to register a non-null
2070   // referent with the SATB barrier.
2071   if (UseG1GC || UseShenandoahGC) {
2072     bool needs_barrier = false;
2073 
2074     if (ret != NULL &&
2075         offset == java_lang_ref_Reference::referent_offset &&
2076         InstanceKlass::cast(k)->reference_type() != REF_NONE) {
2077       assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
2078       needs_barrier = true;
2079     }
2080 
2081     if (needs_barrier) {
2082       oop referent = JNIHandles::resolve(ret);
2083       G1SATBCardTableModRefBS::enqueue(referent);
2084     }
2085   }
2086 #endif // INCLUDE_ALL_GCS
2087 HOTSPOT_JNI_GETOBJECTFIELD_RETURN(ret);
2088   return ret;
2089 JNI_END
2090 
2091 
2092 
2093 #define DEFINE_GETFIELD(Return,Fieldname,Result \
2094   , EntryProbe, ReturnProbe) \
2095 \
2096   DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return \
2097   , ReturnProbe); \
2098 \
2099 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \
2100   JNIWrapper("Get" XSTR(Result) "Field"); \
2101 \
2102   EntryProbe; \
2103   Return ret = 0;\
2104   DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\
2105 \
2106   oop o = JNIHandles::resolve_non_null(obj); \
2107   Klass* k = o->klass(); \
2108   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);  \
2109   /* Keep JVMTI addition small and only check enabled flag here.       */ \
2110   /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \
2111   /* and creates a ResetNoHandleMark.                                   */ \
2112   if (JvmtiExport::should_post_field_access()) { \
2113     o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \
2114   } \
2115   ret = o->Fieldname##_field(offset); \
2116   return ret; \
2117 JNI_END
2118 
2119 DEFINE_GETFIELD(jboolean, bool,   Boolean
2120                 , HOTSPOT_JNI_GETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2121                 HOTSPOT_JNI_GETBOOLEANFIELD_RETURN(_ret_ref))
2122 DEFINE_GETFIELD(jbyte,    byte,   Byte
2123                 , HOTSPOT_JNI_GETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2124                 HOTSPOT_JNI_GETBYTEFIELD_RETURN(_ret_ref))
2125 DEFINE_GETFIELD(jchar,    char,   Char
2126                 , HOTSPOT_JNI_GETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2127                 HOTSPOT_JNI_GETCHARFIELD_RETURN(_ret_ref))
2128 DEFINE_GETFIELD(jshort,   short,  Short
2129                 , HOTSPOT_JNI_GETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2130                 HOTSPOT_JNI_GETSHORTFIELD_RETURN(_ret_ref))
2131 DEFINE_GETFIELD(jint,     int,    Int
2132                 , HOTSPOT_JNI_GETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2133                 HOTSPOT_JNI_GETINTFIELD_RETURN(_ret_ref))
2134 DEFINE_GETFIELD(jlong,    long,   Long
2135                 , HOTSPOT_JNI_GETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2136                 HOTSPOT_JNI_GETLONGFIELD_RETURN(_ret_ref))
2137 // Float and double probes don't return value because dtrace doesn't currently support it
2138 DEFINE_GETFIELD(jfloat,   float,  Float
2139                 , HOTSPOT_JNI_GETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2140                 HOTSPOT_JNI_GETFLOATFIELD_RETURN())
2141 DEFINE_GETFIELD(jdouble,  double, Double
2142                 , HOTSPOT_JNI_GETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2143                 HOTSPOT_JNI_GETDOUBLEFIELD_RETURN())
2144 
2145 address jni_GetBooleanField_addr() {
2146   return (address)jni_GetBooleanField;
2147 }
2148 address jni_GetByteField_addr() {
2149   return (address)jni_GetByteField;
2150 }
2151 address jni_GetCharField_addr() {
2152   return (address)jni_GetCharField;
2153 }
2154 address jni_GetShortField_addr() {
2155   return (address)jni_GetShortField;
2156 }
2157 address jni_GetIntField_addr() {
2158   return (address)jni_GetIntField;
2159 }
2160 address jni_GetLongField_addr() {
2161   return (address)jni_GetLongField;
2162 }
2163 address jni_GetFloatField_addr() {
2164   return (address)jni_GetFloatField;
2165 }
2166 address jni_GetDoubleField_addr() {
2167   return (address)jni_GetDoubleField;
2168 }
2169 
2170 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))
2171   JNIWrapper("SetObjectField");
2172   HOTSPOT_JNI_SETOBJECTFIELD_ENTRY(env, obj, (uintptr_t) fieldID, value);
2173   oop o = JNIHandles::resolve_non_null(obj);
2174   Klass* k = o->klass();
2175   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2176   // Keep JVMTI addition small and only check enabled flag here.
2177   // jni_SetField_probe_nh() assumes that is not okay to create handles
2178   // and creates a ResetNoHandleMark.
2179   if (JvmtiExport::should_post_field_modification()) {
2180     jvalue field_value;
2181     field_value.l = value;
2182     o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);
2183   }
2184   o->obj_field_put(offset, JNIHandles::resolve(value));
2185   HOTSPOT_JNI_SETOBJECTFIELD_RETURN();
2186 JNI_END
2187 
2188 
2189 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType \
2190                         , EntryProbe, ReturnProbe) \
2191 \
2192 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \
2193   JNIWrapper("Set" XSTR(Result) "Field"); \
2194 \
2195   EntryProbe; \
2196 \
2197   oop o = JNIHandles::resolve_non_null(obj); \
2198   Klass* k = o->klass(); \
2199   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);  \
2200   /* Keep JVMTI addition small and only check enabled flag here.       */ \
2201   /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \
2202   /* and creates a ResetNoHandleMark.                                   */ \
2203   if (JvmtiExport::should_post_field_modification()) { \
2204     jvalue field_value; \
2205     field_value.unionType = value; \
2206     o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \
2207   } \
2208   o->Fieldname##_field_put(offset, value); \
2209   ReturnProbe; \
2210 JNI_END
2211 
2212 DEFINE_SETFIELD(jboolean, bool,   Boolean, 'Z', z
2213                 , HOTSPOT_JNI_SETBOOLEANFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2214                 HOTSPOT_JNI_SETBOOLEANFIELD_RETURN())
2215 DEFINE_SETFIELD(jbyte,    byte,   Byte,    'B', b
2216                 , HOTSPOT_JNI_SETBYTEFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2217                 HOTSPOT_JNI_SETBYTEFIELD_RETURN())
2218 DEFINE_SETFIELD(jchar,    char,   Char,    'C', c
2219                 , HOTSPOT_JNI_SETCHARFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2220                 HOTSPOT_JNI_SETCHARFIELD_RETURN())
2221 DEFINE_SETFIELD(jshort,   short,  Short,   'S', s
2222                 , HOTSPOT_JNI_SETSHORTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2223                 HOTSPOT_JNI_SETSHORTFIELD_RETURN())
2224 DEFINE_SETFIELD(jint,     int,    Int,     'I', i
2225                 , HOTSPOT_JNI_SETINTFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2226                 HOTSPOT_JNI_SETINTFIELD_RETURN())
2227 DEFINE_SETFIELD(jlong,    long,   Long,    'J', j
2228                 , HOTSPOT_JNI_SETLONGFIELD_ENTRY(env, obj, (uintptr_t)fieldID, value),
2229                 HOTSPOT_JNI_SETLONGFIELD_RETURN())
2230 // Float and double probes don't return value because dtrace doesn't currently support it
2231 DEFINE_SETFIELD(jfloat,   float,  Float,   'F', f
2232                 , HOTSPOT_JNI_SETFLOATFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2233                 HOTSPOT_JNI_SETFLOATFIELD_RETURN())
2234 DEFINE_SETFIELD(jdouble,  double, Double,  'D', d
2235                 , HOTSPOT_JNI_SETDOUBLEFIELD_ENTRY(env, obj, (uintptr_t)fieldID),
2236                 HOTSPOT_JNI_SETDOUBLEFIELD_RETURN())
2237 
2238 DT_RETURN_MARK_DECL(ToReflectedField, jobject
2239                     , HOTSPOT_JNI_TOREFLECTEDFIELD_RETURN(_ret_ref));
2240 
2241 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))
2242   JNIWrapper("ToReflectedField");
2243   HOTSPOT_JNI_TOREFLECTEDFIELD_ENTRY(env, cls, (uintptr_t) fieldID, isStatic);
2244   jobject ret = NULL;
2245   DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);
2246 
2247   fieldDescriptor fd;
2248   bool found = false;
2249   Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2250 
2251   assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");
2252 
2253   if (isStatic) {
2254     // Static field. The fieldID a JNIid specifying the field holder and the offset within the Klass*.
2255     JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2256     assert(id->is_static_field_id(), "invalid static field id");
2257     found = id->find_local_field(&fd);
2258   } else {
2259     // Non-static field. The fieldID is really the offset of the field within the instanceOop.
2260     int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);
2261     found = InstanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);
2262   }
2263   assert(found, "bad fieldID passed into jni_ToReflectedField");
2264   oop reflected = Reflection::new_field(&fd, CHECK_NULL);
2265   ret = JNIHandles::make_local(env, reflected);
2266   return ret;
2267 JNI_END
2268 
2269 
2270 //
2271 // Accessing Static Fields
2272 //
2273 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID
2274                     , HOTSPOT_JNI_GETSTATICFIELDID_RETURN((uintptr_t)_ret_ref));
2275 
2276 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,
2277           const char *name, const char *sig))
2278   JNIWrapper("GetStaticFieldID");
2279   HOTSPOT_JNI_GETSTATICFIELDID_ENTRY(env, clazz, (char *) name, (char *) sig);
2280   jfieldID ret = NULL;
2281   DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);
2282 
2283   // The class should have been loaded (we have an instance of the class
2284   // passed in) so the field and signature should already be in the symbol
2285   // table.  If they're not there, the field doesn't exist.
2286   TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));
2287   TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));
2288   if (fieldname == NULL || signame == NULL) {
2289     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2290   }
2291   KlassHandle k(THREAD,
2292                 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
2293   // Make sure class is initialized before handing id's out to static fields
2294   k()->initialize(CHECK_NULL);
2295 
2296   fieldDescriptor fd;
2297   if (!k()->oop_is_instance() ||
2298       !InstanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) {
2299     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);
2300   }
2301 
2302   // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the Klass*
2303   JNIid* id = fd.field_holder()->jni_id_for(fd.offset());
2304   debug_only(id->set_is_static_field_id();)
2305 
2306   debug_only(id->verify(fd.field_holder()));
2307 
2308   ret = jfieldIDWorkaround::to_static_jfieldID(id);
2309   return ret;
2310 JNI_END
2311 
2312 
2313 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))
2314   JNIWrapper("GetStaticObjectField");
2315   HOTSPOT_JNI_GETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID);
2316 #if INCLUDE_JNI_CHECK
2317   DEBUG_ONLY(Klass* param_k = jniCheck::validate_class(thread, clazz);)
2318 #endif // INCLUDE_JNI_CHECK
2319   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2320   assert(id->is_static_field_id(), "invalid static field id");
2321   // Keep JVMTI addition small and only check enabled flag here.
2322   // jni_GetField_probe() assumes that is okay to create handles.
2323   if (JvmtiExport::should_post_field_access()) {
2324     JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);
2325   }
2326   jobject ret = JNIHandles::make_local(id->holder()->java_mirror()->obj_field(id->offset()));
2327   HOTSPOT_JNI_GETSTATICOBJECTFIELD_RETURN(ret);
2328   return ret;
2329 JNI_END
2330 
2331 
2332 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result \
2333                               , EntryProbe, ReturnProbe) \
2334 \
2335   DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return \
2336                           , ReturnProbe);                                          \
2337 \
2338 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \
2339   JNIWrapper("GetStatic" XSTR(Result) "Field"); \
2340   EntryProbe; \
2341   Return ret = 0;\
2342   DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \
2343                      (const Return&)ret);\
2344   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2345   assert(id->is_static_field_id(), "invalid static field id"); \
2346   /* Keep JVMTI addition small and only check enabled flag here. */ \
2347   /* jni_GetField_probe() assumes that is okay to create handles. */ \
2348   if (JvmtiExport::should_post_field_access()) { \
2349     JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \
2350   } \
2351   ret = id->holder()->java_mirror()-> Fieldname##_field (id->offset()); \
2352   return ret;\
2353 JNI_END
2354 
2355 DEFINE_GETSTATICFIELD(jboolean, bool,   Boolean
2356                       , HOTSPOT_JNI_GETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t) fieldID), HOTSPOT_JNI_GETSTATICBOOLEANFIELD_RETURN(_ret_ref))
2357 DEFINE_GETSTATICFIELD(jbyte,    byte,   Byte
2358                       , HOTSPOT_JNI_GETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),    HOTSPOT_JNI_GETSTATICBYTEFIELD_RETURN(_ret_ref)   )
2359 DEFINE_GETSTATICFIELD(jchar,    char,   Char
2360                       , HOTSPOT_JNI_GETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),    HOTSPOT_JNI_GETSTATICCHARFIELD_RETURN(_ret_ref)   )
2361 DEFINE_GETSTATICFIELD(jshort,   short,  Short
2362                       , HOTSPOT_JNI_GETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),   HOTSPOT_JNI_GETSTATICSHORTFIELD_RETURN(_ret_ref)  )
2363 DEFINE_GETSTATICFIELD(jint,     int,    Int
2364                       , HOTSPOT_JNI_GETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),     HOTSPOT_JNI_GETSTATICINTFIELD_RETURN(_ret_ref)    )
2365 DEFINE_GETSTATICFIELD(jlong,    long,   Long
2366                       , HOTSPOT_JNI_GETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),    HOTSPOT_JNI_GETSTATICLONGFIELD_RETURN(_ret_ref)   )
2367 // Float and double probes don't return value because dtrace doesn't currently support it
2368 DEFINE_GETSTATICFIELD(jfloat,   float,  Float
2369                       , HOTSPOT_JNI_GETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),   HOTSPOT_JNI_GETSTATICFLOATFIELD_RETURN()          )
2370 DEFINE_GETSTATICFIELD(jdouble,  double, Double
2371                       , HOTSPOT_JNI_GETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),  HOTSPOT_JNI_GETSTATICDOUBLEFIELD_RETURN()         )
2372 
2373 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))
2374   JNIWrapper("SetStaticObjectField");
2375  HOTSPOT_JNI_SETSTATICOBJECTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value);
2376   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);
2377   assert(id->is_static_field_id(), "invalid static field id");
2378   // Keep JVMTI addition small and only check enabled flag here.
2379   // jni_SetField_probe() assumes that is okay to create handles.
2380   if (JvmtiExport::should_post_field_modification()) {
2381     jvalue field_value;
2382     field_value.l = value;
2383     JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);
2384   }
2385   id->holder()->java_mirror()->obj_field_put(id->offset(), JNIHandles::resolve(value));
2386   HOTSPOT_JNI_SETSTATICOBJECTFIELD_RETURN();
2387 JNI_END
2388 
2389 
2390 
2391 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType \
2392                               , EntryProbe, ReturnProbe) \
2393 \
2394 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \
2395   JNIWrapper("SetStatic" XSTR(Result) "Field"); \
2396   EntryProbe; \
2397 \
2398   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \
2399   assert(id->is_static_field_id(), "invalid static field id"); \
2400   /* Keep JVMTI addition small and only check enabled flag here. */ \
2401   /* jni_SetField_probe() assumes that is okay to create handles. */ \
2402   if (JvmtiExport::should_post_field_modification()) { \
2403     jvalue field_value; \
2404     field_value.unionType = value; \
2405     JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \
2406   } \
2407   id->holder()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \
2408   ReturnProbe;\
2409 JNI_END
2410 
2411 DEFINE_SETSTATICFIELD(jboolean, bool,   Boolean, 'Z', z
2412                       , HOTSPOT_JNI_SETSTATICBOOLEANFIELD_ENTRY(env, clazz, (uintptr_t)fieldID, value),
2413                       HOTSPOT_JNI_SETSTATICBOOLEANFIELD_RETURN())
2414 DEFINE_SETSTATICFIELD(jbyte,    byte,   Byte,    'B', b
2415                       , HOTSPOT_JNI_SETSTATICBYTEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2416                       HOTSPOT_JNI_SETSTATICBYTEFIELD_RETURN())
2417 DEFINE_SETSTATICFIELD(jchar,    char,   Char,    'C', c
2418                       , HOTSPOT_JNI_SETSTATICCHARFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2419                       HOTSPOT_JNI_SETSTATICCHARFIELD_RETURN())
2420 DEFINE_SETSTATICFIELD(jshort,   short,  Short,   'S', s
2421                       , HOTSPOT_JNI_SETSTATICSHORTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2422                       HOTSPOT_JNI_SETSTATICSHORTFIELD_RETURN())
2423 DEFINE_SETSTATICFIELD(jint,     int,    Int,     'I', i
2424                       , HOTSPOT_JNI_SETSTATICINTFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2425                       HOTSPOT_JNI_SETSTATICINTFIELD_RETURN())
2426 DEFINE_SETSTATICFIELD(jlong,    long,   Long,    'J', j
2427                       , HOTSPOT_JNI_SETSTATICLONGFIELD_ENTRY(env, clazz, (uintptr_t) fieldID, value),
2428                       HOTSPOT_JNI_SETSTATICLONGFIELD_RETURN())
2429 // Float and double probes don't return value because dtrace doesn't currently support it
2430 DEFINE_SETSTATICFIELD(jfloat,   float,  Float,   'F', f
2431                       , HOTSPOT_JNI_SETSTATICFLOATFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2432                       HOTSPOT_JNI_SETSTATICFLOATFIELD_RETURN())
2433 DEFINE_SETSTATICFIELD(jdouble,  double, Double,  'D', d
2434                       , HOTSPOT_JNI_SETSTATICDOUBLEFIELD_ENTRY(env, clazz, (uintptr_t) fieldID),
2435                       HOTSPOT_JNI_SETSTATICDOUBLEFIELD_RETURN())
2436 
2437 //
2438 // String Operations
2439 //
2440 
2441 // Unicode Interface
2442 
2443 DT_RETURN_MARK_DECL(NewString, jstring
2444                     , HOTSPOT_JNI_NEWSTRING_RETURN(_ret_ref));
2445 
2446 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))
2447   JNIWrapper("NewString");
2448  HOTSPOT_JNI_NEWSTRING_ENTRY(env, (uint16_t *) unicodeChars, len);
2449   jstring ret = NULL;
2450   DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);
2451   oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);
2452   ret = (jstring) JNIHandles::make_local(env, string);
2453   return ret;
2454 JNI_END
2455 
2456 
2457 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))
2458   JNIWrapper("GetStringLength");
2459   HOTSPOT_JNI_GETSTRINGLENGTH_ENTRY(env, string);
2460   jsize ret = 0;
2461   oop s = JNIHandles::resolve_non_null(string);
2462   if (java_lang_String::value(s) != NULL) {
2463     ret = java_lang_String::length(s);
2464   }
2465  HOTSPOT_JNI_GETSTRINGLENGTH_RETURN(ret);
2466   return ret;
2467 JNI_END
2468 
2469 
2470 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(
2471   JNIEnv *env, jstring string, jboolean *isCopy))
2472   JNIWrapper("GetStringChars");
2473  HOTSPOT_JNI_GETSTRINGCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2474   jchar* buf = NULL;
2475   oop s = JNIHandles::resolve_non_null(string);
2476   typeArrayOop s_value = typeArrayOop(oopDesc::bs()->read_barrier(java_lang_String::value(s)));
2477   if (s_value != NULL) {
2478     int s_len = java_lang_String::length(s);
2479     int s_offset = java_lang_String::offset(s);
2480     buf = NEW_C_HEAP_ARRAY_RETURN_NULL(jchar, s_len + 1, mtInternal);  // add one for zero termination
2481     /* JNI Specification states return NULL on OOM */
2482     if (buf != NULL) {
2483       if (s_len > 0) {
2484         memcpy(buf, s_value->char_at_addr(s_offset), sizeof(jchar)*s_len);
2485       }
2486       buf[s_len] = 0;
2487       //%note jni_5
2488       if (isCopy != NULL) {
2489         *isCopy = JNI_TRUE;
2490       }
2491     }
2492   }
2493   HOTSPOT_JNI_GETSTRINGCHARS_RETURN(buf);
2494   return buf;
2495 JNI_END
2496 
2497 
2498 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))
2499   JNIWrapper("ReleaseStringChars");
2500   HOTSPOT_JNI_RELEASESTRINGCHARS_ENTRY(env, str, (uint16_t *) chars);
2501   //%note jni_6
2502   if (chars != NULL) {
2503     // Since String objects are supposed to be immutable, don't copy any
2504     // new data back.  A bad user will have to go after the char array.
2505     FreeHeap((void*) chars);
2506   }
2507   HOTSPOT_JNI_RELEASESTRINGCHARS_RETURN();
2508 JNI_END
2509 
2510 
2511 // UTF Interface
2512 
2513 DT_RETURN_MARK_DECL(NewStringUTF, jstring
2514                     , HOTSPOT_JNI_NEWSTRINGUTF_RETURN(_ret_ref));
2515 
2516 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))
2517   JNIWrapper("NewStringUTF");
2518   HOTSPOT_JNI_NEWSTRINGUTF_ENTRY(env, (char *) bytes);
2519   jstring ret;
2520   DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);
2521 
2522   oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);
2523   ret = (jstring) JNIHandles::make_local(env, result);
2524   return ret;
2525 JNI_END
2526 
2527 
2528 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))
2529   JNIWrapper("GetStringUTFLength");
2530  HOTSPOT_JNI_GETSTRINGUTFLENGTH_ENTRY(env, string);
2531   jsize ret = 0;
2532   oop java_string = JNIHandles::resolve_non_null(string);
2533   if (java_lang_String::value(java_string) != NULL) {
2534     ret = java_lang_String::utf8_length(java_string);
2535   }
2536   HOTSPOT_JNI_GETSTRINGUTFLENGTH_RETURN(ret);
2537   return ret;
2538 JNI_END
2539 
2540 
2541 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))
2542   JNIWrapper("GetStringUTFChars");
2543  HOTSPOT_JNI_GETSTRINGUTFCHARS_ENTRY(env, string, (uintptr_t *) isCopy);
2544   char* result = NULL;
2545   oop java_string = JNIHandles::resolve_non_null(string);
2546   if (java_lang_String::value(java_string) != NULL) {
2547     size_t length = java_lang_String::utf8_length(java_string);
2548     /* JNI Specification states return NULL on OOM */
2549     result = AllocateHeap(length + 1, mtInternal, 0, AllocFailStrategy::RETURN_NULL);
2550     if (result != NULL) {
2551       java_lang_String::as_utf8_string(java_string, result, (int) length + 1);
2552       if (isCopy != NULL) {
2553         *isCopy = JNI_TRUE;
2554       }
2555     }
2556   }
2557  HOTSPOT_JNI_GETSTRINGUTFCHARS_RETURN(result);
2558   return result;
2559 JNI_END
2560 
2561 
2562 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))
2563   JNIWrapper("ReleaseStringUTFChars");
2564  HOTSPOT_JNI_RELEASESTRINGUTFCHARS_ENTRY(env, str, (char *) chars);
2565   if (chars != NULL) {
2566     FreeHeap((char*) chars);
2567   }
2568 HOTSPOT_JNI_RELEASESTRINGUTFCHARS_RETURN();
2569 JNI_END
2570 
2571 
2572 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))
2573   JNIWrapper("GetArrayLength");
2574  HOTSPOT_JNI_GETARRAYLENGTH_ENTRY(env, array);
2575   arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));
2576   assert(a->is_array(), "must be array");
2577   jsize ret = a->length();
2578  HOTSPOT_JNI_GETARRAYLENGTH_RETURN(ret);
2579   return ret;
2580 JNI_END
2581 
2582 
2583 //
2584 // Object Array Operations
2585 //
2586 
2587 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray
2588                     , HOTSPOT_JNI_NEWOBJECTARRAY_RETURN(_ret_ref));
2589 
2590 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))
2591   JNIWrapper("NewObjectArray");
2592  HOTSPOT_JNI_NEWOBJECTARRAY_ENTRY(env, length, elementClass, initialElement);
2593   jobjectArray ret = NULL;
2594   DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);
2595   KlassHandle ek(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(elementClass)));
2596   Klass* ako = ek()->array_klass(CHECK_NULL);
2597   KlassHandle ak = KlassHandle(THREAD, ako);
2598   ObjArrayKlass::cast(ak())->initialize(CHECK_NULL);
2599   objArrayOop result = ObjArrayKlass::cast(ak())->allocate(length, CHECK_NULL);
2600   oop initial_value = JNIHandles::resolve(initialElement);
2601   if (initial_value != NULL) {  // array already initialized with NULL
2602     for (int index = 0; index < length; index++) {
2603       result->obj_at_put(index, initial_value);
2604     }
2605   }
2606   ret = (jobjectArray) JNIHandles::make_local(env, result);
2607   return ret;
2608 JNI_END
2609 
2610 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject
2611                     , HOTSPOT_JNI_GETOBJECTARRAYELEMENT_RETURN(_ret_ref));
2612 
2613 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))
2614   JNIWrapper("GetObjectArrayElement");
2615  HOTSPOT_JNI_GETOBJECTARRAYELEMENT_ENTRY(env, array, index);
2616   jobject ret = NULL;
2617   DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);
2618   objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2619   if (a->is_within_bounds(index)) {
2620     ret = JNIHandles::make_local(env, a->obj_at(index));
2621     return ret;
2622   } else {
2623     char buf[jintAsStringSize];
2624     sprintf(buf, "%d", index);
2625     THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2626   }
2627 JNI_END
2628 
2629 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement
2630                          , HOTSPOT_JNI_SETOBJECTARRAYELEMENT_RETURN());
2631 
2632 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))
2633   JNIWrapper("SetObjectArrayElement");
2634  HOTSPOT_JNI_SETOBJECTARRAYELEMENT_ENTRY(env, array, index, value);
2635   DT_VOID_RETURN_MARK(SetObjectArrayElement);
2636 
2637   objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));
2638   oop v = JNIHandles::resolve(value);
2639   if (a->is_within_bounds(index)) {
2640     if (v == NULL || v->is_a(ObjArrayKlass::cast(a->klass())->element_klass())) {
2641       a->obj_at_put(index, v);
2642     } else {
2643       THROW(vmSymbols::java_lang_ArrayStoreException());
2644     }
2645   } else {
2646     char buf[jintAsStringSize];
2647     sprintf(buf, "%d", index);
2648     THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);
2649   }
2650 JNI_END
2651 
2652 
2653 
2654 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result \
2655                               ,EntryProbe,ReturnProbe)  \
2656 \
2657   DT_RETURN_MARK_DECL(New##Result##Array, Return \
2658                       , ReturnProbe); \
2659 \
2660 JNI_ENTRY(Return, \
2661           jni_New##Result##Array(JNIEnv *env, jsize len)) \
2662   JNIWrapper("New" XSTR(Result) "Array"); \
2663   EntryProbe; \
2664   Return ret = NULL;\
2665   DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\
2666 \
2667   oop obj= oopFactory::Allocator(len, CHECK_0); \
2668   ret = (Return) JNIHandles::make_local(env, obj); \
2669   return ret;\
2670 JNI_END
2671 
2672 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray,   Boolean,
2673                       HOTSPOT_JNI_NEWBOOLEANARRAY_ENTRY(env, len),
2674                       HOTSPOT_JNI_NEWBOOLEANARRAY_RETURN(_ret_ref))
2675 DEFINE_NEWSCALARARRAY(jbyteArray,    new_byteArray,   Byte,
2676                       HOTSPOT_JNI_NEWBYTEARRAY_ENTRY(env, len),
2677                       HOTSPOT_JNI_NEWBYTEARRAY_RETURN(_ret_ref))
2678 DEFINE_NEWSCALARARRAY(jshortArray,   new_shortArray,  Short,
2679                       HOTSPOT_JNI_NEWSHORTARRAY_ENTRY(env, len),
2680                       HOTSPOT_JNI_NEWSHORTARRAY_RETURN(_ret_ref))
2681 DEFINE_NEWSCALARARRAY(jcharArray,    new_charArray,   Char,
2682                       HOTSPOT_JNI_NEWCHARARRAY_ENTRY(env, len),
2683                       HOTSPOT_JNI_NEWCHARARRAY_RETURN(_ret_ref))
2684 DEFINE_NEWSCALARARRAY(jintArray,     new_intArray,    Int,
2685                       HOTSPOT_JNI_NEWINTARRAY_ENTRY(env, len),
2686                       HOTSPOT_JNI_NEWINTARRAY_RETURN(_ret_ref))
2687 DEFINE_NEWSCALARARRAY(jlongArray,    new_longArray,   Long,
2688                       HOTSPOT_JNI_NEWLONGARRAY_ENTRY(env, len),
2689                       HOTSPOT_JNI_NEWLONGARRAY_RETURN(_ret_ref))
2690 DEFINE_NEWSCALARARRAY(jfloatArray,   new_singleArray, Float,
2691                       HOTSPOT_JNI_NEWFLOATARRAY_ENTRY(env, len),
2692                       HOTSPOT_JNI_NEWFLOATARRAY_RETURN(_ret_ref))
2693 DEFINE_NEWSCALARARRAY(jdoubleArray,  new_doubleArray, Double,
2694                       HOTSPOT_JNI_NEWDOUBLEARRAY_ENTRY(env, len),
2695                       HOTSPOT_JNI_NEWDOUBLEARRAY_RETURN(_ret_ref))
2696 
2697 // Return an address which will fault if the caller writes to it.
2698 
2699 static char* get_bad_address() {
2700   static char* bad_address = NULL;
2701   if (bad_address == NULL) {
2702     size_t size = os::vm_allocation_granularity();
2703     bad_address = os::reserve_memory(size);
2704     if (bad_address != NULL) {
2705       os::protect_memory(bad_address, size, os::MEM_PROT_READ,
2706                          /*is_committed*/false);
2707       MemTracker::record_virtual_memory_type((void*)bad_address, mtInternal);
2708     }
2709   }
2710   return bad_address;
2711 }
2712 
2713 
2714 
2715 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag \
2716                                       , EntryProbe, ReturnProbe) \
2717 \
2718 JNI_QUICK_ENTRY(ElementType*, \
2719           jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \
2720   JNIWrapper("Get" XSTR(Result) "ArrayElements"); \
2721   EntryProbe; \
2722   /* allocate an chunk of memory in c land */ \
2723   typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2724   a = typeArrayOop(oopDesc::bs()->read_barrier(a)); \
2725   ElementType* result; \
2726   int len = a->length(); \
2727   if (len == 0) { \
2728     /* Empty array: legal but useless, can't return NULL. \
2729      * Return a pointer to something useless. \
2730      * Avoid asserts in typeArrayOop. */ \
2731     result = (ElementType*)get_bad_address(); \
2732   } else { \
2733     /* JNI Specification states return NULL on OOM */                    \
2734     result = NEW_C_HEAP_ARRAY_RETURN_NULL(ElementType, len, mtInternal); \
2735     if (result != NULL) {                                                \
2736       /* copy the array to the c chunk */                                \
2737       memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len);      \
2738       if (isCopy) {                                                      \
2739         *isCopy = JNI_TRUE;                                              \
2740       }                                                                  \
2741     }                                                                    \
2742   } \
2743   ReturnProbe; \
2744   return result; \
2745 JNI_END
2746 
2747 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2748                               , HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2749                               HOTSPOT_JNI_GETBOOLEANARRAYELEMENTS_RETURN((uintptr_t*)result))
2750 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE,    jbyte,    Byte,    byte
2751                               , HOTSPOT_JNI_GETBYTEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2752                               HOTSPOT_JNI_GETBYTEARRAYELEMENTS_RETURN((char*)result))
2753 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT,   jshort,   Short,   short
2754                               , HOTSPOT_JNI_GETSHORTARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2755                               HOTSPOT_JNI_GETSHORTARRAYELEMENTS_RETURN((uint16_t*)result))
2756 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR,    jchar,    Char,    char
2757                               , HOTSPOT_JNI_GETCHARARRAYELEMENTS_ENTRY(env, (uint16_t*) array, (uintptr_t *) isCopy),
2758                               HOTSPOT_JNI_GETCHARARRAYELEMENTS_RETURN(result))
2759 DEFINE_GETSCALARARRAYELEMENTS(T_INT,     jint,     Int,     int
2760                               , HOTSPOT_JNI_GETINTARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2761                               HOTSPOT_JNI_GETINTARRAYELEMENTS_RETURN((uint32_t*)result))
2762 DEFINE_GETSCALARARRAYELEMENTS(T_LONG,    jlong,    Long,    long
2763                               , HOTSPOT_JNI_GETLONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2764                               HOTSPOT_JNI_GETLONGARRAYELEMENTS_RETURN(((uintptr_t*)result)))
2765 // Float and double probes don't return value because dtrace doesn't currently support it
2766 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT,   jfloat,   Float,   float
2767                               , HOTSPOT_JNI_GETFLOATARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2768                               HOTSPOT_JNI_GETFLOATARRAYELEMENTS_RETURN(result))
2769 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE,  jdouble,  Double,  double
2770                               , HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) isCopy),
2771                               HOTSPOT_JNI_GETDOUBLEARRAYELEMENTS_RETURN(result))
2772 
2773 
2774 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag \
2775                                           , EntryProbe, ReturnProbe);\
2776 \
2777 JNI_QUICK_ENTRY(void, \
2778           jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \
2779                                              ElementType *buf, jint mode)) \
2780   JNIWrapper("Release" XSTR(Result) "ArrayElements"); \
2781   EntryProbe; \
2782   typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2783   a = typeArrayOop(oopDesc::bs()->write_barrier(a)); \
2784   int len = a->length(); \
2785   if (len != 0) {   /* Empty array:  nothing to free or copy. */  \
2786     if ((mode == 0) || (mode == JNI_COMMIT)) { \
2787       memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \
2788     } \
2789     if ((mode == 0) || (mode == JNI_ABORT)) { \
2790       FreeHeap(buf); \
2791     } \
2792   } \
2793   ReturnProbe; \
2794 JNI_END
2795 
2796 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool
2797                                   , HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2798                                   HOTSPOT_JNI_RELEASEBOOLEANARRAYELEMENTS_RETURN())
2799 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE,    jbyte,    Byte,    byte
2800                                   , HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_ENTRY(env, array, (char *) buf, mode),
2801                                   HOTSPOT_JNI_RELEASEBYTEARRAYELEMENTS_RETURN())
2802 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT,   jshort,   Short,   short
2803                                   ,  HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2804                                   HOTSPOT_JNI_RELEASESHORTARRAYELEMENTS_RETURN())
2805 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR,    jchar,    Char,    char
2806                                   ,  HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_ENTRY(env, array, (uint16_t *) buf, mode),
2807                                   HOTSPOT_JNI_RELEASECHARARRAYELEMENTS_RETURN())
2808 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT,     jint,     Int,     int
2809                                   , HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_ENTRY(env, array, (uint32_t *) buf, mode),
2810                                   HOTSPOT_JNI_RELEASEINTARRAYELEMENTS_RETURN())
2811 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG,    jlong,    Long,    long
2812                                   , HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_ENTRY(env, array, (uintptr_t *) buf, mode),
2813                                   HOTSPOT_JNI_RELEASELONGARRAYELEMENTS_RETURN())
2814 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT,   jfloat,   Float,   float
2815                                   , HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_ENTRY(env, array, (float *) buf, mode),
2816                                   HOTSPOT_JNI_RELEASEFLOATARRAYELEMENTS_RETURN())
2817 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE,  jdouble,  Double,  double
2818                                   , HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_ENTRY(env, array, (double *) buf, mode),
2819                                   HOTSPOT_JNI_RELEASEDOUBLEARRAYELEMENTS_RETURN())
2820 
2821 
2822 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2823                                     , EntryProbe, ReturnProbe); \
2824   DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion \
2825                            , ReturnProbe); \
2826 \
2827 JNI_ENTRY(void, \
2828 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2829              jsize len, ElementType *buf)) \
2830   JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \
2831   EntryProbe; \
2832   DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \
2833   typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2834   src = typeArrayOop(oopDesc::bs()->read_barrier(src)); \
2835   if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \
2836     THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2837   } else { \
2838     if (len > 0) { \
2839       int sc = TypeArrayKlass::cast(src->klass())->log2_element_size(); \
2840       memcpy((u_char*) buf, \
2841              (u_char*) src->Tag##_at_addr(start), \
2842              len << sc);                          \
2843     } \
2844   } \
2845 JNI_END
2846 
2847 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool
2848                             , HOTSPOT_JNI_GETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2849                             HOTSPOT_JNI_GETBOOLEANARRAYREGION_RETURN());
2850 DEFINE_GETSCALARARRAYREGION(T_BYTE,    jbyte,   Byte,    byte
2851                             ,  HOTSPOT_JNI_GETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2852                             HOTSPOT_JNI_GETBYTEARRAYREGION_RETURN());
2853 DEFINE_GETSCALARARRAYREGION(T_SHORT,   jshort,  Short,   short
2854                             , HOTSPOT_JNI_GETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2855                             HOTSPOT_JNI_GETSHORTARRAYREGION_RETURN());
2856 DEFINE_GETSCALARARRAYREGION(T_CHAR,    jchar,   Char,    char
2857                             ,  HOTSPOT_JNI_GETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t*) buf),
2858                             HOTSPOT_JNI_GETCHARARRAYREGION_RETURN());
2859 DEFINE_GETSCALARARRAYREGION(T_INT,     jint,    Int,     int
2860                             , HOTSPOT_JNI_GETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t*) buf),
2861                             HOTSPOT_JNI_GETINTARRAYREGION_RETURN());
2862 DEFINE_GETSCALARARRAYREGION(T_LONG,    jlong,   Long,    long
2863                             ,  HOTSPOT_JNI_GETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2864                             HOTSPOT_JNI_GETLONGARRAYREGION_RETURN());
2865 DEFINE_GETSCALARARRAYREGION(T_FLOAT,   jfloat,  Float,   float
2866                             , HOTSPOT_JNI_GETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2867                             HOTSPOT_JNI_GETFLOATARRAYREGION_RETURN());
2868 DEFINE_GETSCALARARRAYREGION(T_DOUBLE,  jdouble, Double,  double
2869                             , HOTSPOT_JNI_GETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2870                             HOTSPOT_JNI_GETDOUBLEARRAYREGION_RETURN());
2871 
2872 
2873 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag \
2874                                     , EntryProbe, ReturnProbe); \
2875   DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion \
2876                            ,ReturnProbe);           \
2877 \
2878 JNI_ENTRY(void, \
2879 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \
2880              jsize len, const ElementType *buf)) \
2881   JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \
2882   EntryProbe; \
2883   DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \
2884   typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \
2885   dst = typeArrayOop(oopDesc::bs()->write_barrier(dst)); \
2886   if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \
2887     THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \
2888   } else { \
2889     if (len > 0) { \
2890       int sc = TypeArrayKlass::cast(dst->klass())->log2_element_size(); \
2891       memcpy((u_char*) dst->Tag##_at_addr(start), \
2892              (u_char*) buf, \
2893              len << sc);    \
2894     } \
2895   } \
2896 JNI_END
2897 
2898 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool
2899                             , HOTSPOT_JNI_SETBOOLEANARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *)buf),
2900                             HOTSPOT_JNI_SETBOOLEANARRAYREGION_RETURN())
2901 DEFINE_SETSCALARARRAYREGION(T_BYTE,    jbyte,    Byte,    byte
2902                             , HOTSPOT_JNI_SETBYTEARRAYREGION_ENTRY(env, array, start, len, (char *) buf),
2903                             HOTSPOT_JNI_SETBYTEARRAYREGION_RETURN())
2904 DEFINE_SETSCALARARRAYREGION(T_SHORT,   jshort,   Short,   short
2905                             , HOTSPOT_JNI_SETSHORTARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2906                             HOTSPOT_JNI_SETSHORTARRAYREGION_RETURN())
2907 DEFINE_SETSCALARARRAYREGION(T_CHAR,    jchar,    Char,    char
2908                             , HOTSPOT_JNI_SETCHARARRAYREGION_ENTRY(env, array, start, len, (uint16_t *) buf),
2909                             HOTSPOT_JNI_SETCHARARRAYREGION_RETURN())
2910 DEFINE_SETSCALARARRAYREGION(T_INT,     jint,     Int,     int
2911                             , HOTSPOT_JNI_SETINTARRAYREGION_ENTRY(env, array, start, len, (uint32_t *) buf),
2912                             HOTSPOT_JNI_SETINTARRAYREGION_RETURN())
2913 DEFINE_SETSCALARARRAYREGION(T_LONG,    jlong,    Long,    long
2914                             , HOTSPOT_JNI_SETLONGARRAYREGION_ENTRY(env, array, start, len, (uintptr_t *) buf),
2915                             HOTSPOT_JNI_SETLONGARRAYREGION_RETURN())
2916 DEFINE_SETSCALARARRAYREGION(T_FLOAT,   jfloat,   Float,   float
2917                             , HOTSPOT_JNI_SETFLOATARRAYREGION_ENTRY(env, array, start, len, (float *) buf),
2918                             HOTSPOT_JNI_SETFLOATARRAYREGION_RETURN())
2919 DEFINE_SETSCALARARRAYREGION(T_DOUBLE,  jdouble,  Double,  double
2920                             , HOTSPOT_JNI_SETDOUBLEARRAYREGION_ENTRY(env, array, start, len, (double *) buf),
2921                             HOTSPOT_JNI_SETDOUBLEARRAYREGION_RETURN())
2922 
2923 
2924 //
2925 // Interception of natives
2926 //
2927 
2928 // The RegisterNatives call being attempted tried to register with a method that
2929 // is not native.  Ask JVM TI what prefixes have been specified.  Then check
2930 // to see if the native method is now wrapped with the prefixes.  See the
2931 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.
2932 static Method* find_prefixed_native(KlassHandle k,
2933                                       Symbol* name, Symbol* signature, TRAPS) {
2934 #if INCLUDE_JVMTI
2935   ResourceMark rm(THREAD);
2936   Method* method;
2937   int name_len = name->utf8_length();
2938   char* name_str = name->as_utf8();
2939   int prefix_count;
2940   char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
2941   for (int i = 0; i < prefix_count; i++) {
2942     char* prefix = prefixes[i];
2943     int prefix_len = (int)strlen(prefix);
2944 
2945     // try adding this prefix to the method name and see if it matches another method name
2946     int trial_len = name_len + prefix_len;
2947     char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);
2948     strcpy(trial_name_str, prefix);
2949     strcat(trial_name_str, name_str);
2950     TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);
2951     if (trial_name == NULL) {
2952       continue; // no such symbol, so this prefix wasn't used, try the next prefix
2953     }
2954     method = k()->lookup_method(trial_name, signature);
2955     if (method == NULL) {
2956       continue; // signature doesn't match, try the next prefix
2957     }
2958     if (method->is_native()) {
2959       method->set_is_prefixed_native();
2960       return method; // wahoo, we found a prefixed version of the method, return it
2961     }
2962     // found as non-native, so prefix is good, add it, probably just need more prefixes
2963     name_len = trial_len;
2964     name_str = trial_name_str;
2965   }
2966 #endif // INCLUDE_JVMTI
2967   return NULL; // not found
2968 }
2969 
2970 static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) {
2971   Method* method = k()->lookup_method(name, signature);
2972   if (method == NULL) {
2973     ResourceMark rm;
2974     stringStream st;
2975     st.print("Method %s name or signature does not match",
2976              Method::name_and_sig_as_C_string(k(), name, signature));
2977     THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2978   }
2979   if (!method->is_native()) {
2980     // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)
2981     method = find_prefixed_native(k, name, signature, THREAD);
2982     if (method == NULL) {
2983       ResourceMark rm;
2984       stringStream st;
2985       st.print("Method %s is not declared as native",
2986                Method::name_and_sig_as_C_string(k(), name, signature));
2987       THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);
2988     }
2989   }
2990 
2991   if (entry != NULL) {
2992     method->set_native_function(entry,
2993       Method::native_bind_event_is_interesting);
2994   } else {
2995     method->clear_native_function();
2996   }
2997   if (PrintJNIResolving) {
2998     ResourceMark rm(THREAD);
2999     tty->print_cr("[Registering JNI native method %s.%s]",
3000       method->method_holder()->external_name(),
3001       method->name()->as_C_string());
3002   }
3003   return true;
3004 }
3005 
3006 DT_RETURN_MARK_DECL(RegisterNatives, jint
3007                     , HOTSPOT_JNI_REGISTERNATIVES_RETURN(_ret_ref));
3008 
3009 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,
3010                                     const JNINativeMethod *methods,
3011                                     jint nMethods))
3012   JNIWrapper("RegisterNatives");
3013   HOTSPOT_JNI_REGISTERNATIVES_ENTRY(env, clazz, (void *) methods, nMethods);
3014   jint ret = 0;
3015   DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);
3016 
3017   KlassHandle h_k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz)));
3018 
3019   for (int index = 0; index < nMethods; index++) {
3020     const char* meth_name = methods[index].name;
3021     const char* meth_sig = methods[index].signature;
3022     int meth_name_len = (int)strlen(meth_name);
3023 
3024     // The class should have been loaded (we have an instance of the class
3025     // passed in) so the method and signature should already be in the symbol
3026     // table.  If they're not there, the method doesn't exist.
3027     TempNewSymbol  name = SymbolTable::probe(meth_name, meth_name_len);
3028     TempNewSymbol  signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));
3029 
3030     if (name == NULL || signature == NULL) {
3031       ResourceMark rm;
3032       stringStream st;
3033       st.print("Method %s.%s%s not found", h_k()->external_name(), meth_name, meth_sig);
3034       // Must return negative value on failure
3035       THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);
3036     }
3037 
3038     bool res = register_native(h_k, name, signature,
3039                                (address) methods[index].fnPtr, THREAD);
3040     if (!res) {
3041       ret = -1;
3042       break;
3043     }
3044   }
3045   return ret;
3046 JNI_END
3047 
3048 
3049 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))
3050   JNIWrapper("UnregisterNatives");
3051  HOTSPOT_JNI_UNREGISTERNATIVES_ENTRY(env, clazz);
3052   Klass* k   = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz));
3053   //%note jni_2
3054   if (k->oop_is_instance()) {
3055     for (int index = 0; index < InstanceKlass::cast(k)->methods()->length(); index++) {
3056       Method* m = InstanceKlass::cast(k)->methods()->at(index);
3057       if (m->is_native()) {
3058         m->clear_native_function();
3059         m->set_signature_handler(NULL);
3060       }
3061     }
3062   }
3063  HOTSPOT_JNI_UNREGISTERNATIVES_RETURN(0);
3064   return 0;
3065 JNI_END
3066 
3067 //
3068 // Monitor functions
3069 //
3070 
3071 DT_RETURN_MARK_DECL(MonitorEnter, jint
3072                     , HOTSPOT_JNI_MONITORENTER_RETURN(_ret_ref));
3073 
3074 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))
3075  HOTSPOT_JNI_MONITORENTER_ENTRY(env, jobj);
3076   jint ret = JNI_ERR;
3077   DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);
3078 
3079   // If the object is null, we can't do anything with it
3080   if (jobj == NULL) {
3081     THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3082   }
3083 
3084   Handle obj(thread, oopDesc::bs()->write_barrier(JNIHandles::resolve_non_null(jobj)));
3085   ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));
3086   ret = JNI_OK;
3087   return ret;
3088 JNI_END
3089 
3090 DT_RETURN_MARK_DECL(MonitorExit, jint
3091                     , HOTSPOT_JNI_MONITOREXIT_RETURN(_ret_ref));
3092 
3093 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))
3094  HOTSPOT_JNI_MONITOREXIT_ENTRY(env, jobj);
3095   jint ret = JNI_ERR;
3096   DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);
3097 
3098   // Don't do anything with a null object
3099   if (jobj == NULL) {
3100     THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);
3101   }
3102 
3103   Handle obj(THREAD, oopDesc::bs()->write_barrier(JNIHandles::resolve_non_null(jobj)));
3104   ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));
3105 
3106   ret = JNI_OK;
3107   return ret;
3108 JNI_END
3109 
3110 //
3111 // Extensions
3112 //
3113 
3114 DT_VOID_RETURN_MARK_DECL(GetStringRegion
3115                          , HOTSPOT_JNI_GETSTRINGREGION_RETURN());
3116 
3117 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))
3118   JNIWrapper("GetStringRegion");
3119  HOTSPOT_JNI_GETSTRINGREGION_ENTRY(env, string, start, len, buf);
3120   DT_VOID_RETURN_MARK(GetStringRegion);
3121   oop s = JNIHandles::resolve_non_null(string);
3122   int s_len = java_lang_String::length(s);
3123   if (start < 0 || len < 0 || start + len > s_len) {
3124     THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3125   } else {
3126     if (len > 0) {
3127       int s_offset = java_lang_String::offset(s);
3128       typeArrayOop s_value = java_lang_String::value(s);
3129       s_value = typeArrayOop(oopDesc::bs()->read_barrier(s_value));
3130       memcpy(buf, s_value->char_at_addr(s_offset+start), sizeof(jchar)*len);
3131     }
3132   }
3133 JNI_END
3134 
3135 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion
3136                          , HOTSPOT_JNI_GETSTRINGUTFREGION_RETURN());
3137 
3138 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))
3139   JNIWrapper("GetStringUTFRegion");
3140  HOTSPOT_JNI_GETSTRINGUTFREGION_ENTRY(env, string, start, len, buf);
3141   DT_VOID_RETURN_MARK(GetStringUTFRegion);
3142   oop s = JNIHandles::resolve_non_null(string);
3143   int s_len = java_lang_String::length(s);
3144   if (start < 0 || len < 0 || start + len > s_len) {
3145     THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());
3146   } else {
3147     //%note jni_7
3148     if (len > 0) {
3149       // Assume the buffer is large enough as the JNI spec. does not require user error checking
3150       java_lang_String::as_utf8_string(s, start, len, buf, INT_MAX);
3151       // as_utf8_string null-terminates the result string
3152     } else {
3153       // JDK null-terminates the buffer even in len is zero
3154       if (buf != NULL) {
3155         buf[0] = 0;
3156       }
3157     }
3158   }
3159 JNI_END
3160 
3161 
3162 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))
3163   JNIWrapper("GetPrimitiveArrayCritical");
3164  HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_ENTRY(env, array, (uintptr_t *) isCopy);
3165   GC_locker::lock_critical(thread);
3166   if (isCopy != NULL) {
3167     *isCopy = JNI_FALSE;
3168   }
3169   oop a = JNIHandles::resolve_non_null(array);
3170   a = oopDesc::bs()->write_barrier(a);
3171   assert(a->is_array(), "just checking");
3172   BasicType type;
3173   if (a->is_objArray()) {
3174     type = T_OBJECT;
3175   } else {
3176     type = TypeArrayKlass::cast(a->klass())->element_type();
3177   }
3178   void* ret = arrayOop(a)->base(type);
3179  HOTSPOT_JNI_GETPRIMITIVEARRAYCRITICAL_RETURN(ret);
3180   return ret;
3181 JNI_END
3182 
3183 
3184 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))
3185   JNIWrapper("ReleasePrimitiveArrayCritical");
3186   HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_ENTRY(env, array, carray, mode);
3187   // The array, carray and mode arguments are ignored
3188   GC_locker::unlock_critical(thread);
3189 HOTSPOT_JNI_RELEASEPRIMITIVEARRAYCRITICAL_RETURN();
3190 JNI_END
3191 
3192 
3193 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))
3194   JNIWrapper("GetStringCritical");
3195   HOTSPOT_JNI_GETSTRINGCRITICAL_ENTRY(env, string, (uintptr_t *) isCopy);
3196   GC_locker::lock_critical(thread);
3197   if (isCopy != NULL) {
3198     *isCopy = JNI_FALSE;
3199   }
3200   oop s = JNIHandles::resolve_non_null(string);
3201   int s_len = java_lang_String::length(s);
3202   typeArrayOop s_value = java_lang_String::value(s);
3203   s_value = typeArrayOop(oopDesc::bs()->read_barrier(s_value));
3204   int s_offset = java_lang_String::offset(s);
3205   const jchar* ret;
3206   if (s_len > 0) {
3207     ret = s_value->char_at_addr(s_offset);
3208   } else {
3209     ret = (jchar*) s_value->base(T_CHAR);
3210   }
3211  HOTSPOT_JNI_GETSTRINGCRITICAL_RETURN((uint16_t *) ret);
3212   return ret;
3213 JNI_END
3214 
3215 
3216 JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
3217   JNIWrapper("ReleaseStringCritical");
3218   HOTSPOT_JNI_RELEASESTRINGCRITICAL_ENTRY(env, str, (uint16_t *) chars);
3219   // The str and chars arguments are ignored
3220   GC_locker::unlock_critical(thread);
3221 HOTSPOT_JNI_RELEASESTRINGCRITICAL_RETURN();
3222 JNI_END
3223 
3224 
3225 JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
3226   JNIWrapper("jni_NewWeakGlobalRef");
3227  HOTSPOT_JNI_NEWWEAKGLOBALREF_ENTRY(env, ref);
3228   Handle ref_handle(thread, JNIHandles::resolve(ref));
3229   jweak ret = JNIHandles::make_weak_global(ref_handle);
3230  HOTSPOT_JNI_NEWWEAKGLOBALREF_RETURN(ret);
3231   return ret;
3232 JNI_END
3233 
3234 // Must be JNI_ENTRY (with HandleMark)
3235 JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
3236   JNIWrapper("jni_DeleteWeakGlobalRef");
3237   HOTSPOT_JNI_DELETEWEAKGLOBALREF_ENTRY(env, ref);
3238   JNIHandles::destroy_weak_global(ref);
3239   HOTSPOT_JNI_DELETEWEAKGLOBALREF_RETURN();
3240 JNI_END
3241 
3242 
3243 JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env))
3244   JNIWrapper("jni_ExceptionCheck");
3245  HOTSPOT_JNI_EXCEPTIONCHECK_ENTRY(env);
3246   jni_check_async_exceptions(thread);
3247   jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
3248  HOTSPOT_JNI_EXCEPTIONCHECK_RETURN(ret);
3249   return ret;
3250 JNI_END
3251 
3252 
3253 // Initialization state for three routines below relating to
3254 // java.nio.DirectBuffers
3255 static          jint directBufferSupportInitializeStarted = 0;
3256 static volatile jint directBufferSupportInitializeEnded   = 0;
3257 static volatile jint directBufferSupportInitializeFailed  = 0;
3258 static jclass    bufferClass                 = NULL;
3259 static jclass    directBufferClass           = NULL;
3260 static jclass    directByteBufferClass       = NULL;
3261 static jmethodID directByteBufferConstructor = NULL;
3262 static jfieldID  directBufferAddressField    = NULL;
3263 static jfieldID  bufferCapacityField         = NULL;
3264 
3265 static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
3266   Handle loader;            // null (bootstrap) loader
3267   Handle protection_domain; // null protection domain
3268 
3269   TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);
3270   jclass result =  find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
3271 
3272   if (TraceClassResolution && result != NULL) {
3273     trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3274   }
3275   return result;
3276 }
3277 
3278 // These lookups are done with the NULL (bootstrap) ClassLoader to
3279 // circumvent any security checks that would be done by jni_FindClass.
3280 JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
3281 {
3282   if ((bufferClass           = lookupOne(env, "java/nio/Buffer", thread))           == NULL) { return false; }
3283   if ((directBufferClass     = lookupOne(env, "sun/nio/ch/DirectBuffer", thread))   == NULL) { return false; }
3284   if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
3285   return true;
3286 }
3287 JNI_END
3288 
3289 
3290 static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
3291   if (directBufferSupportInitializeFailed) {
3292     return false;
3293   }
3294 
3295   if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
3296     if (!lookupDirectBufferClasses(env)) {
3297       directBufferSupportInitializeFailed = 1;
3298       return false;
3299     }
3300 
3301     // Make global references for these
3302     bufferClass           = (jclass) env->NewGlobalRef(bufferClass);
3303     directBufferClass     = (jclass) env->NewGlobalRef(directBufferClass);
3304     directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
3305 
3306     // Get needed field and method IDs
3307     directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
3308     if (env->ExceptionCheck()) {
3309       env->ExceptionClear();
3310       directBufferSupportInitializeFailed = 1;
3311       return false;
3312     }
3313     directBufferAddressField    = env->GetFieldID(bufferClass, "address", "J");
3314     if (env->ExceptionCheck()) {
3315       env->ExceptionClear();
3316       directBufferSupportInitializeFailed = 1;
3317       return false;
3318     }
3319     bufferCapacityField         = env->GetFieldID(bufferClass, "capacity", "I");
3320     if (env->ExceptionCheck()) {
3321       env->ExceptionClear();
3322       directBufferSupportInitializeFailed = 1;
3323       return false;
3324     }
3325 
3326     if ((directByteBufferConstructor == NULL) ||
3327         (directBufferAddressField    == NULL) ||
3328         (bufferCapacityField         == NULL)) {
3329       directBufferSupportInitializeFailed = 1;
3330       return false;
3331     }
3332 
3333     directBufferSupportInitializeEnded = 1;
3334   } else {
3335     while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
3336       os::naked_yield();
3337     }
3338   }
3339 
3340   return !directBufferSupportInitializeFailed;
3341 }
3342 
3343 extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
3344 {
3345   // thread_from_jni_environment() will block if VM is gone.
3346   JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3347 
3348   JNIWrapper("jni_NewDirectByteBuffer");
3349  HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_ENTRY(env, address, capacity);
3350 
3351   if (!directBufferSupportInitializeEnded) {
3352     if (!initializeDirectBufferSupport(env, thread)) {
3353       HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(NULL);
3354       return NULL;
3355     }
3356   }
3357 
3358   // Being paranoid about accidental sign extension on address
3359   jlong addr = (jlong) ((uintptr_t) address);
3360   // NOTE that package-private DirectByteBuffer constructor currently
3361   // takes int capacity
3362   jint  cap  = (jint)  capacity;
3363   jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
3364   HOTSPOT_JNI_NEWDIRECTBYTEBUFFER_RETURN(ret);
3365   return ret;
3366 }
3367 
3368 DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*
3369                     , HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_RETURN((void*) _ret_ref));
3370 
3371 extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
3372 {
3373   // thread_from_jni_environment() will block if VM is gone.
3374   JavaThread* thread = JavaThread::thread_from_jni_environment(env);
3375 
3376   JNIWrapper("jni_GetDirectBufferAddress");
3377   HOTSPOT_JNI_GETDIRECTBUFFERADDRESS_ENTRY(env, buf);
3378   void* ret = NULL;
3379   DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
3380 
3381   if (!directBufferSupportInitializeEnded) {
3382     if (!initializeDirectBufferSupport(env, thread)) {
3383       return 0;
3384     }
3385   }
3386 
3387   if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
3388     return 0;
3389   }
3390 
3391   ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
3392   return ret;
3393 }
3394 
3395 DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong
3396                     , HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_RETURN(_ret_ref));
3397 
3398 extern "C" jlong JNICALL jni_GetDirectBufferCapacity(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_GetDirectBufferCapacity");
3404   HOTSPOT_JNI_GETDIRECTBUFFERCAPACITY_ENTRY(env, buf);
3405   jlong ret = -1;
3406   DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
3407 
3408   if (!directBufferSupportInitializeEnded) {
3409     if (!initializeDirectBufferSupport(env, thread)) {
3410       ret = 0;
3411       return ret;
3412     }
3413   }
3414 
3415   if (buf == NULL) {
3416     return -1;
3417   }
3418 
3419   if (!env->IsInstanceOf(buf, directBufferClass)) {
3420     return -1;
3421   }
3422 
3423   // NOTE that capacity is currently an int in the implementation
3424   ret = env->GetIntField(buf, bufferCapacityField);
3425   return ret;
3426 }
3427 
3428 
3429 JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
3430   JNIWrapper("GetVersion");
3431   HOTSPOT_JNI_GETVERSION_ENTRY(env);
3432   HOTSPOT_JNI_GETVERSION_RETURN(CurrentVersion);
3433   return CurrentVersion;
3434 JNI_END
3435 
3436 extern struct JavaVM_ main_vm;
3437 
3438 JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
3439   JNIWrapper("jni_GetJavaVM");
3440   HOTSPOT_JNI_GETJAVAVM_ENTRY(env, (void **) vm);
3441   *vm  = (JavaVM *)(&main_vm);
3442   HOTSPOT_JNI_GETJAVAVM_RETURN(JNI_OK);
3443   return JNI_OK;
3444 JNI_END
3445 
3446 // Structure containing all jni functions
3447 struct JNINativeInterface_ jni_NativeInterface = {
3448     NULL,
3449     NULL,
3450     NULL,
3451 
3452     NULL,
3453 
3454     jni_GetVersion,
3455 
3456     jni_DefineClass,
3457     jni_FindClass,
3458 
3459     jni_FromReflectedMethod,
3460     jni_FromReflectedField,
3461 
3462     jni_ToReflectedMethod,
3463 
3464     jni_GetSuperclass,
3465     jni_IsAssignableFrom,
3466 
3467     jni_ToReflectedField,
3468 
3469     jni_Throw,
3470     jni_ThrowNew,
3471     jni_ExceptionOccurred,
3472     jni_ExceptionDescribe,
3473     jni_ExceptionClear,
3474     jni_FatalError,
3475 
3476     jni_PushLocalFrame,
3477     jni_PopLocalFrame,
3478 
3479     jni_NewGlobalRef,
3480     jni_DeleteGlobalRef,
3481     jni_DeleteLocalRef,
3482     jni_IsSameObject,
3483 
3484     jni_NewLocalRef,
3485     jni_EnsureLocalCapacity,
3486 
3487     jni_AllocObject,
3488     jni_NewObject,
3489     jni_NewObjectV,
3490     jni_NewObjectA,
3491 
3492     jni_GetObjectClass,
3493     jni_IsInstanceOf,
3494 
3495     jni_GetMethodID,
3496 
3497     jni_CallObjectMethod,
3498     jni_CallObjectMethodV,
3499     jni_CallObjectMethodA,
3500     jni_CallBooleanMethod,
3501     jni_CallBooleanMethodV,
3502     jni_CallBooleanMethodA,
3503     jni_CallByteMethod,
3504     jni_CallByteMethodV,
3505     jni_CallByteMethodA,
3506     jni_CallCharMethod,
3507     jni_CallCharMethodV,
3508     jni_CallCharMethodA,
3509     jni_CallShortMethod,
3510     jni_CallShortMethodV,
3511     jni_CallShortMethodA,
3512     jni_CallIntMethod,
3513     jni_CallIntMethodV,
3514     jni_CallIntMethodA,
3515     jni_CallLongMethod,
3516     jni_CallLongMethodV,
3517     jni_CallLongMethodA,
3518     jni_CallFloatMethod,
3519     jni_CallFloatMethodV,
3520     jni_CallFloatMethodA,
3521     jni_CallDoubleMethod,
3522     jni_CallDoubleMethodV,
3523     jni_CallDoubleMethodA,
3524     jni_CallVoidMethod,
3525     jni_CallVoidMethodV,
3526     jni_CallVoidMethodA,
3527 
3528     jni_CallNonvirtualObjectMethod,
3529     jni_CallNonvirtualObjectMethodV,
3530     jni_CallNonvirtualObjectMethodA,
3531     jni_CallNonvirtualBooleanMethod,
3532     jni_CallNonvirtualBooleanMethodV,
3533     jni_CallNonvirtualBooleanMethodA,
3534     jni_CallNonvirtualByteMethod,
3535     jni_CallNonvirtualByteMethodV,
3536     jni_CallNonvirtualByteMethodA,
3537     jni_CallNonvirtualCharMethod,
3538     jni_CallNonvirtualCharMethodV,
3539     jni_CallNonvirtualCharMethodA,
3540     jni_CallNonvirtualShortMethod,
3541     jni_CallNonvirtualShortMethodV,
3542     jni_CallNonvirtualShortMethodA,
3543     jni_CallNonvirtualIntMethod,
3544     jni_CallNonvirtualIntMethodV,
3545     jni_CallNonvirtualIntMethodA,
3546     jni_CallNonvirtualLongMethod,
3547     jni_CallNonvirtualLongMethodV,
3548     jni_CallNonvirtualLongMethodA,
3549     jni_CallNonvirtualFloatMethod,
3550     jni_CallNonvirtualFloatMethodV,
3551     jni_CallNonvirtualFloatMethodA,
3552     jni_CallNonvirtualDoubleMethod,
3553     jni_CallNonvirtualDoubleMethodV,
3554     jni_CallNonvirtualDoubleMethodA,
3555     jni_CallNonvirtualVoidMethod,
3556     jni_CallNonvirtualVoidMethodV,
3557     jni_CallNonvirtualVoidMethodA,
3558 
3559     jni_GetFieldID,
3560 
3561     jni_GetObjectField,
3562     jni_GetBooleanField,
3563     jni_GetByteField,
3564     jni_GetCharField,
3565     jni_GetShortField,
3566     jni_GetIntField,
3567     jni_GetLongField,
3568     jni_GetFloatField,
3569     jni_GetDoubleField,
3570 
3571     jni_SetObjectField,
3572     jni_SetBooleanField,
3573     jni_SetByteField,
3574     jni_SetCharField,
3575     jni_SetShortField,
3576     jni_SetIntField,
3577     jni_SetLongField,
3578     jni_SetFloatField,
3579     jni_SetDoubleField,
3580 
3581     jni_GetStaticMethodID,
3582 
3583     jni_CallStaticObjectMethod,
3584     jni_CallStaticObjectMethodV,
3585     jni_CallStaticObjectMethodA,
3586     jni_CallStaticBooleanMethod,
3587     jni_CallStaticBooleanMethodV,
3588     jni_CallStaticBooleanMethodA,
3589     jni_CallStaticByteMethod,
3590     jni_CallStaticByteMethodV,
3591     jni_CallStaticByteMethodA,
3592     jni_CallStaticCharMethod,
3593     jni_CallStaticCharMethodV,
3594     jni_CallStaticCharMethodA,
3595     jni_CallStaticShortMethod,
3596     jni_CallStaticShortMethodV,
3597     jni_CallStaticShortMethodA,
3598     jni_CallStaticIntMethod,
3599     jni_CallStaticIntMethodV,
3600     jni_CallStaticIntMethodA,
3601     jni_CallStaticLongMethod,
3602     jni_CallStaticLongMethodV,
3603     jni_CallStaticLongMethodA,
3604     jni_CallStaticFloatMethod,
3605     jni_CallStaticFloatMethodV,
3606     jni_CallStaticFloatMethodA,
3607     jni_CallStaticDoubleMethod,
3608     jni_CallStaticDoubleMethodV,
3609     jni_CallStaticDoubleMethodA,
3610     jni_CallStaticVoidMethod,
3611     jni_CallStaticVoidMethodV,
3612     jni_CallStaticVoidMethodA,
3613 
3614     jni_GetStaticFieldID,
3615 
3616     jni_GetStaticObjectField,
3617     jni_GetStaticBooleanField,
3618     jni_GetStaticByteField,
3619     jni_GetStaticCharField,
3620     jni_GetStaticShortField,
3621     jni_GetStaticIntField,
3622     jni_GetStaticLongField,
3623     jni_GetStaticFloatField,
3624     jni_GetStaticDoubleField,
3625 
3626     jni_SetStaticObjectField,
3627     jni_SetStaticBooleanField,
3628     jni_SetStaticByteField,
3629     jni_SetStaticCharField,
3630     jni_SetStaticShortField,
3631     jni_SetStaticIntField,
3632     jni_SetStaticLongField,
3633     jni_SetStaticFloatField,
3634     jni_SetStaticDoubleField,
3635 
3636     jni_NewString,
3637     jni_GetStringLength,
3638     jni_GetStringChars,
3639     jni_ReleaseStringChars,
3640 
3641     jni_NewStringUTF,
3642     jni_GetStringUTFLength,
3643     jni_GetStringUTFChars,
3644     jni_ReleaseStringUTFChars,
3645 
3646     jni_GetArrayLength,
3647 
3648     jni_NewObjectArray,
3649     jni_GetObjectArrayElement,
3650     jni_SetObjectArrayElement,
3651 
3652     jni_NewBooleanArray,
3653     jni_NewByteArray,
3654     jni_NewCharArray,
3655     jni_NewShortArray,
3656     jni_NewIntArray,
3657     jni_NewLongArray,
3658     jni_NewFloatArray,
3659     jni_NewDoubleArray,
3660 
3661     jni_GetBooleanArrayElements,
3662     jni_GetByteArrayElements,
3663     jni_GetCharArrayElements,
3664     jni_GetShortArrayElements,
3665     jni_GetIntArrayElements,
3666     jni_GetLongArrayElements,
3667     jni_GetFloatArrayElements,
3668     jni_GetDoubleArrayElements,
3669 
3670     jni_ReleaseBooleanArrayElements,
3671     jni_ReleaseByteArrayElements,
3672     jni_ReleaseCharArrayElements,
3673     jni_ReleaseShortArrayElements,
3674     jni_ReleaseIntArrayElements,
3675     jni_ReleaseLongArrayElements,
3676     jni_ReleaseFloatArrayElements,
3677     jni_ReleaseDoubleArrayElements,
3678 
3679     jni_GetBooleanArrayRegion,
3680     jni_GetByteArrayRegion,
3681     jni_GetCharArrayRegion,
3682     jni_GetShortArrayRegion,
3683     jni_GetIntArrayRegion,
3684     jni_GetLongArrayRegion,
3685     jni_GetFloatArrayRegion,
3686     jni_GetDoubleArrayRegion,
3687 
3688     jni_SetBooleanArrayRegion,
3689     jni_SetByteArrayRegion,
3690     jni_SetCharArrayRegion,
3691     jni_SetShortArrayRegion,
3692     jni_SetIntArrayRegion,
3693     jni_SetLongArrayRegion,
3694     jni_SetFloatArrayRegion,
3695     jni_SetDoubleArrayRegion,
3696 
3697     jni_RegisterNatives,
3698     jni_UnregisterNatives,
3699 
3700     jni_MonitorEnter,
3701     jni_MonitorExit,
3702 
3703     jni_GetJavaVM,
3704 
3705     jni_GetStringRegion,
3706     jni_GetStringUTFRegion,
3707 
3708     jni_GetPrimitiveArrayCritical,
3709     jni_ReleasePrimitiveArrayCritical,
3710 
3711     jni_GetStringCritical,
3712     jni_ReleaseStringCritical,
3713 
3714     jni_NewWeakGlobalRef,
3715     jni_DeleteWeakGlobalRef,
3716 
3717     jni_ExceptionCheck,
3718 
3719     jni_NewDirectByteBuffer,
3720     jni_GetDirectBufferAddress,
3721     jni_GetDirectBufferCapacity,
3722 
3723     // New 1_6 features
3724 
3725     jni_GetObjectRefType
3726 };
3727 
3728 
3729 // For jvmti use to modify jni function table.
3730 // Java threads in native contiues to run until it is transitioned
3731 // to VM at safepoint. Before the transition or before it is blocked
3732 // for safepoint it may access jni function table. VM could crash if
3733 // any java thread access the jni function table in the middle of memcpy.
3734 // To avoid this each function pointers are copied automically.
3735 void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
3736   assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
3737   intptr_t *a = (intptr_t *) jni_functions();
3738   intptr_t *b = (intptr_t *) new_jni_NativeInterface;
3739   for (uint i=0; i <  sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
3740     Atomic::store_ptr(*b++, a++);
3741   }
3742 }
3743 
3744 void quicken_jni_functions() {
3745   // Replace Get<Primitive>Field with fast versions
3746   if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
3747       && !VerifyJNIFields && !TraceJNICalls && !CountJNICalls && !CheckJNICalls
3748 #if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2)
3749       // windows x86 currently needs SEH wrapper and the gain of the fast
3750       // versions currently isn't certain for server vm on uniprocessor.
3751       && os::is_MP()
3752 #endif
3753   ) {
3754     address func;
3755     func = JNI_FastGetField::generate_fast_get_boolean_field();
3756     if (func != (address)-1) {
3757       jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
3758     }
3759     func = JNI_FastGetField::generate_fast_get_byte_field();
3760     if (func != (address)-1) {
3761       jni_NativeInterface.GetByteField = (GetByteField_t)func;
3762     }
3763     func = JNI_FastGetField::generate_fast_get_char_field();
3764     if (func != (address)-1) {
3765       jni_NativeInterface.GetCharField = (GetCharField_t)func;
3766     }
3767     func = JNI_FastGetField::generate_fast_get_short_field();
3768     if (func != (address)-1) {
3769       jni_NativeInterface.GetShortField = (GetShortField_t)func;
3770     }
3771     func = JNI_FastGetField::generate_fast_get_int_field();
3772     if (func != (address)-1) {
3773       jni_NativeInterface.GetIntField = (GetIntField_t)func;
3774     }
3775     func = JNI_FastGetField::generate_fast_get_long_field();
3776     if (func != (address)-1) {
3777       jni_NativeInterface.GetLongField = (GetLongField_t)func;
3778     }
3779     func = JNI_FastGetField::generate_fast_get_float_field();
3780     if (func != (address)-1) {
3781       jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
3782     }
3783     func = JNI_FastGetField::generate_fast_get_double_field();
3784     if (func != (address)-1) {
3785       jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
3786     }
3787   }
3788 }
3789 
3790 // Returns the function structure
3791 struct JNINativeInterface_* jni_functions() {
3792 #if INCLUDE_JNI_CHECK
3793   if (CheckJNICalls) return jni_functions_check();
3794 #endif // INCLUDE_JNI_CHECK
3795   return &jni_NativeInterface;
3796 }
3797 
3798 // Returns the function structure
3799 struct JNINativeInterface_* jni_functions_nocheck() {
3800   return &jni_NativeInterface;
3801 }
3802 
3803 
3804 // Invocation API
3805 
3806 
3807 // Forward declaration
3808 extern const struct JNIInvokeInterface_ jni_InvokeInterface;
3809 
3810 // Global invocation API vars
3811 volatile jint vm_created = 0;
3812 // Indicate whether it is safe to recreate VM
3813 volatile jint safe_to_recreate_vm = 1;
3814 struct JavaVM_ main_vm = {&jni_InvokeInterface};
3815 
3816 
3817 #define JAVASTACKSIZE (400 * 1024)    /* Default size of a thread java stack */
3818 enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
3819 
3820 DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint
3821                     , HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_RETURN(_ret_ref));
3822 
3823 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
3824   HOTSPOT_JNI_GETDEFAULTJAVAVMINITARGS_ENTRY(args_);
3825   JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
3826   jint ret = JNI_ERR;
3827   DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
3828 
3829   if (Threads::is_supported_jni_version(args->version)) {
3830     ret = JNI_OK;
3831   }
3832   // 1.1 style no longer supported in hotspot.
3833   // According the JNI spec, we should update args->version on return.
3834   // We also use the structure to communicate with launcher about default
3835   // stack size.
3836   if (args->version == JNI_VERSION_1_1) {
3837     args->version = JNI_VERSION_1_2;
3838     // javaStackSize is int in arguments structure
3839     assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
3840     args->javaStackSize = (jint)(ThreadStackSize * K);
3841   }
3842   return ret;
3843 }
3844 
3845 #ifndef PRODUCT
3846 
3847 #include "gc/shared/collectedHeap.hpp"
3848 #include "gc/shared/gcTimer.hpp"
3849 #if INCLUDE_ALL_GCS
3850 #include "gc/g1/heapRegionRemSet.hpp"
3851 #endif
3852 #include "memory/guardedMemory.hpp"
3853 #include "utilities/ostream.hpp"
3854 #include "utilities/quickSort.hpp"
3855 #if INCLUDE_VM_STRUCTS
3856 #include "runtime/vmStructs.hpp"
3857 #endif
3858 
3859 #define run_unit_test(unit_test_function_call)              \
3860   tty->print_cr("Running test: " #unit_test_function_call); \
3861   unit_test_function_call
3862 
3863 // Forward declaration
3864 void test_semaphore();
3865 void TestOS_test();
3866 void TestReservedSpace_test();
3867 void TestReserveMemorySpecial_test();
3868 void TestVirtualSpace_test();
3869 void TestMetaspaceAux_test();
3870 void TestMetachunk_test();
3871 void TestVirtualSpaceNode_test();
3872 void TestNewSize_test();
3873 void TestOldSize_test();
3874 void TestKlass_test();
3875 void TestBitMap_test();
3876 void TestAsUtf8();
3877 void Test_linked_list();
3878 void TestChunkedList_test();
3879 #if INCLUDE_ALL_GCS
3880 void TestOldFreeSpaceCalculation_test();
3881 void TestG1BiasedArray_test();
3882 void TestBufferingOopClosure_test();
3883 void TestCodeCacheRemSet_test();
3884 void FreeRegionList_test();
3885 void test_memset_with_concurrent_readers();
3886 #endif
3887 
3888 void execute_internal_vm_tests() {
3889   if (ExecuteInternalVMTests) {
3890     tty->print_cr("Running internal VM tests");
3891     run_unit_test(test_semaphore());
3892     run_unit_test(TestOS_test());
3893     run_unit_test(TestReservedSpace_test());
3894     run_unit_test(TestReserveMemorySpecial_test());
3895     run_unit_test(TestVirtualSpace_test());
3896     run_unit_test(TestMetaspaceAux_test());
3897     run_unit_test(TestMetachunk_test());
3898     run_unit_test(TestVirtualSpaceNode_test());
3899     run_unit_test(GlobalDefinitions::test_globals());
3900     run_unit_test(GCTimerAllTest::all());
3901     run_unit_test(arrayOopDesc::test_max_array_length());
3902     run_unit_test(CollectedHeap::test_is_in());
3903     run_unit_test(QuickSort::test_quick_sort());
3904     run_unit_test(GuardedMemory::test_guarded_memory());
3905     run_unit_test(AltHashing::test_alt_hash());
3906     run_unit_test(test_loggc_filename());
3907     run_unit_test(TestNewSize_test());
3908     run_unit_test(TestOldSize_test());
3909     run_unit_test(TestKlass_test());
3910     run_unit_test(TestBitMap_test());
3911     run_unit_test(TestAsUtf8());
3912     run_unit_test(ObjectMonitor::sanity_checks());
3913     run_unit_test(Test_linked_list());
3914     run_unit_test(TestChunkedList_test());
3915 #if INCLUDE_VM_STRUCTS
3916     run_unit_test(VMStructs::test());
3917 #endif
3918 #if INCLUDE_ALL_GCS
3919     run_unit_test(TestOldFreeSpaceCalculation_test());
3920     run_unit_test(TestG1BiasedArray_test());
3921     run_unit_test(HeapRegionRemSet::test_prt());
3922     run_unit_test(TestBufferingOopClosure_test());
3923     run_unit_test(TestCodeCacheRemSet_test());
3924     if (UseG1GC) {
3925       run_unit_test(FreeRegionList_test());
3926     }
3927     run_unit_test(test_memset_with_concurrent_readers());
3928 #endif
3929     tty->print_cr("All internal VM tests passed");
3930   }
3931 }
3932 
3933 #undef run_unit_test
3934 
3935 #endif
3936 
3937 DT_RETURN_MARK_DECL(CreateJavaVM, jint
3938                     , HOTSPOT_JNI_CREATEJAVAVM_RETURN(_ret_ref));
3939 
3940 static jint JNI_CreateJavaVM_inner(JavaVM **vm, void **penv, void *args) {
3941   HOTSPOT_JNI_CREATEJAVAVM_ENTRY((void **) vm, penv, args);
3942 
3943   jint result = JNI_ERR;
3944   DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
3945 
3946   // We're about to use Atomic::xchg for synchronization.  Some Zero
3947   // platforms use the GCC builtin __sync_lock_test_and_set for this,
3948   // but __sync_lock_test_and_set is not guaranteed to do what we want
3949   // on all architectures.  So we check it works before relying on it.
3950 #if defined(ZERO) && defined(ASSERT)
3951   {
3952     jint a = 0xcafebabe;
3953     jint b = Atomic::xchg(0xdeadbeef, &a);
3954     void *c = &a;
3955     void *d = Atomic::xchg_ptr(&b, &c);
3956     assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works");
3957     assert(c == &b && d == &a, "Atomic::xchg_ptr() works");
3958   }
3959 #endif // ZERO && ASSERT
3960 
3961   // At the moment it's only possible to have one Java VM,
3962   // since some of the runtime state is in global variables.
3963 
3964   // We cannot use our mutex locks here, since they only work on
3965   // Threads. We do an atomic compare and exchange to ensure only
3966   // one thread can call this method at a time
3967 
3968   // We use Atomic::xchg rather than Atomic::add/dec since on some platforms
3969   // the add/dec implementations are dependent on whether we are running
3970   // on a multiprocessor, and at this stage of initialization the os::is_MP
3971   // function used to determine this will always return false. Atomic::xchg
3972   // does not have this problem.
3973   if (Atomic::xchg(1, &vm_created) == 1) {
3974     return JNI_EEXIST;   // already created, or create attempt in progress
3975   }
3976   if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
3977     return JNI_ERR;  // someone tried and failed and retry not allowed.
3978   }
3979 
3980   assert(vm_created == 1, "vm_created is true during the creation");
3981 
3982   /**
3983    * Certain errors during initialization are recoverable and do not
3984    * prevent this method from being called again at a later time
3985    * (perhaps with different arguments).  However, at a certain
3986    * point during initialization if an error occurs we cannot allow
3987    * this function to be called again (or it will crash).  In those
3988    * situations, the 'canTryAgain' flag is set to false, which atomically
3989    * sets safe_to_recreate_vm to 1, such that any new call to
3990    * JNI_CreateJavaVM will immediately fail using the above logic.
3991    */
3992   bool can_try_again = true;
3993 
3994   result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
3995   if (result == JNI_OK) {
3996     JavaThread *thread = JavaThread::current();
3997     assert(!thread->has_pending_exception(), "should have returned not OK");
3998     /* thread is thread_in_vm here */
3999     *vm = (JavaVM *)(&main_vm);
4000     *(JNIEnv**)penv = thread->jni_environment();
4001 
4002     // Tracks the time application was running before GC
4003     RuntimeService::record_application_start();
4004 
4005     // Notify JVMTI
4006     if (JvmtiExport::should_post_thread_life()) {
4007        JvmtiExport::post_thread_start(thread);
4008     }
4009 
4010     EventThreadStart event;
4011     if (event.should_commit()) {
4012       event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
4013       event.commit();
4014     }
4015 
4016 #ifndef PRODUCT
4017     // Check if we should compile all classes on bootclasspath
4018     if (CompileTheWorld) ClassLoader::compile_the_world();
4019     if (ReplayCompiles) ciReplay::replay(thread);
4020 
4021     // Some platforms (like Win*) need a wrapper around these test
4022     // functions in order to properly handle error conditions.
4023     test_error_handler();
4024     execute_internal_vm_tests();
4025 #endif
4026 
4027     // Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
4028     ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4029   } else {
4030     // If create_vm exits because of a pending exception, exit with that
4031     // exception.  In the future when we figure out how to reclaim memory,
4032     // we may be able to exit with JNI_ERR and allow the calling application
4033     // to continue.
4034     if (Universe::is_fully_initialized()) {
4035       // otherwise no pending exception possible - VM will already have aborted
4036       JavaThread* THREAD = JavaThread::current();
4037       if (HAS_PENDING_EXCEPTION) {
4038         HandleMark hm;
4039         vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION));
4040       }
4041     }
4042 
4043     if (can_try_again) {
4044       // reset safe_to_recreate_vm to 1 so that retrial would be possible
4045       safe_to_recreate_vm = 1;
4046     }
4047 
4048     // Creation failed. We must reset vm_created
4049     *vm = 0;
4050     *(JNIEnv**)penv = 0;
4051     // reset vm_created last to avoid race condition. Use OrderAccess to
4052     // control both compiler and architectural-based reordering.
4053     OrderAccess::release_store(&vm_created, 0);
4054   }
4055 
4056   return result;
4057 
4058 }
4059 
4060 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
4061   jint result = 0;
4062   // On Windows, let CreateJavaVM run with SEH protection
4063 #ifdef _WIN32
4064   __try {
4065 #endif
4066     result = JNI_CreateJavaVM_inner(vm, penv, args);
4067 #ifdef _WIN32
4068   } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
4069     // Nothing to do.
4070   }
4071 #endif
4072   return result;
4073 }
4074 
4075 _JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
4076   // See bug 4367188, the wrapper can sometimes cause VM crashes
4077   // JNIWrapper("GetCreatedJavaVMs");
4078 
4079   HOTSPOT_JNI_GETCREATEDJAVAVMS_ENTRY((void **) vm_buf, bufLen, (uintptr_t *) numVMs);
4080 
4081   if (vm_created) {
4082     if (numVMs != NULL) *numVMs = 1;
4083     if (bufLen > 0)     *vm_buf = (JavaVM *)(&main_vm);
4084   } else {
4085     if (numVMs != NULL) *numVMs = 0;
4086   }
4087   HOTSPOT_JNI_GETCREATEDJAVAVMS_RETURN(JNI_OK);
4088   return JNI_OK;
4089 }
4090 
4091 extern "C" {
4092 
4093 DT_RETURN_MARK_DECL(DestroyJavaVM, jint
4094                     , HOTSPOT_JNI_DESTROYJAVAVM_RETURN(_ret_ref));
4095 
4096 jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
4097   HOTSPOT_JNI_DESTROYJAVAVM_ENTRY(vm);
4098   jint res = JNI_ERR;
4099   DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
4100 
4101   if (!vm_created) {
4102     res = JNI_ERR;
4103     return res;
4104   }
4105 
4106   JNIWrapper("DestroyJavaVM");
4107   JNIEnv *env;
4108   JavaVMAttachArgs destroyargs;
4109   destroyargs.version = CurrentVersion;
4110   destroyargs.name = (char *)"DestroyJavaVM";
4111   destroyargs.group = NULL;
4112   res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
4113   if (res != JNI_OK) {
4114     return res;
4115   }
4116 
4117   // Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
4118   JavaThread* thread = JavaThread::current();
4119   ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4120   if (Threads::destroy_vm()) {
4121     // Should not change thread state, VM is gone
4122     vm_created = false;
4123     res = JNI_OK;
4124     return res;
4125   } else {
4126     ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4127     res = JNI_ERR;
4128     return res;
4129   }
4130 }
4131 
4132 
4133 static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
4134   JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
4135 
4136   // Check below commented out from JDK1.2fcs as well
4137   /*
4138   if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
4139     return JNI_EVERSION;
4140   }
4141   */
4142 
4143   Thread* t = ThreadLocalStorage::get_thread_slow();
4144   if (t != NULL) {
4145     // If the thread has been attached this operation is a no-op
4146     *(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
4147     return JNI_OK;
4148   }
4149 
4150   // Create a thread and mark it as attaching so it will be skipped by the
4151   // ThreadsListEnumerator - see CR 6404306
4152   JavaThread* thread = new JavaThread(true);
4153 
4154   // Set correct safepoint info. The thread is going to call into Java when
4155   // initializing the Java level thread object. Hence, the correct state must
4156   // be set in order for the Safepoint code to deal with it correctly.
4157   thread->set_thread_state(_thread_in_vm);
4158   // Must do this before initialize_thread_local_storage
4159   thread->record_stack_base_and_size();
4160 
4161   thread->initialize_thread_local_storage();
4162 
4163   if (!os::create_attached_thread(thread)) {
4164     delete thread;
4165     return JNI_ERR;
4166   }
4167   // Enable stack overflow checks
4168   thread->create_stack_guard_pages();
4169 
4170   thread->initialize_tlab();
4171 
4172   thread->cache_global_variables();
4173 
4174   // Crucial that we do not have a safepoint check for this thread, since it has
4175   // not been added to the Thread list yet.
4176   { Threads_lock->lock_without_safepoint_check();
4177     // This must be inside this lock in order to get FullGCALot to work properly, i.e., to
4178     // avoid this thread trying to do a GC before it is added to the thread-list
4179     thread->set_active_handles(JNIHandleBlock::allocate_block());
4180     Threads::add(thread, daemon);
4181     Threads_lock->unlock();
4182   }
4183   // Create thread group and name info from attach arguments
4184   oop group = NULL;
4185   char* thread_name = NULL;
4186   if (args != NULL && Threads::is_supported_jni_version(args->version)) {
4187     group = JNIHandles::resolve(args->group);
4188     thread_name = args->name; // may be NULL
4189   }
4190   if (group == NULL) group = Universe::main_thread_group();
4191 
4192   // Create Java level thread object and attach it to this thread
4193   bool attach_failed = false;
4194   {
4195     EXCEPTION_MARK;
4196     HandleMark hm(THREAD);
4197     Handle thread_group(THREAD, group);
4198     thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
4199     if (HAS_PENDING_EXCEPTION) {
4200       CLEAR_PENDING_EXCEPTION;
4201       // cleanup outside the handle mark.
4202       attach_failed = true;
4203     }
4204   }
4205 
4206   if (attach_failed) {
4207     // Added missing cleanup
4208     thread->cleanup_failed_attach_current_thread();
4209     return JNI_ERR;
4210   }
4211 
4212   // mark the thread as no longer attaching
4213   // this uses a fence to push the change through so we don't have
4214   // to regrab the threads_lock
4215   thread->set_done_attaching_via_jni();
4216 
4217   // Set java thread status.
4218   java_lang_Thread::set_thread_status(thread->threadObj(),
4219               java_lang_Thread::RUNNABLE);
4220 
4221   // Notify the debugger
4222   if (JvmtiExport::should_post_thread_life()) {
4223     JvmtiExport::post_thread_start(thread);
4224   }
4225 
4226   EventThreadStart event;
4227   if (event.should_commit()) {
4228     event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
4229     event.commit();
4230   }
4231 
4232   *(JNIEnv**)penv = thread->jni_environment();
4233 
4234   // Now leaving the VM, so change thread_state. This is normally automatically taken care
4235   // of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
4236   // using ThreadStateTransition::transition, we do a callback to the safepoint code if
4237   // needed.
4238 
4239   ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
4240 
4241   // Perform any platform dependent FPU setup
4242   os::setup_fpu();
4243 
4244   return JNI_OK;
4245 }
4246 
4247 
4248 jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
4249   HOTSPOT_JNI_ATTACHCURRENTTHREAD_ENTRY(vm, penv, _args);
4250   if (!vm_created) {
4251   HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4252     return JNI_ERR;
4253   }
4254 
4255   JNIWrapper("AttachCurrentThread");
4256   jint ret = attach_current_thread(vm, penv, _args, false);
4257   HOTSPOT_JNI_ATTACHCURRENTTHREAD_RETURN(ret);
4258   return ret;
4259 }
4260 
4261 
4262 jint JNICALL jni_DetachCurrentThread(JavaVM *vm)  {
4263   HOTSPOT_JNI_DETACHCURRENTTHREAD_ENTRY(vm);
4264   VM_Exit::block_if_vm_exited();
4265 
4266   JNIWrapper("DetachCurrentThread");
4267 
4268   // If the thread has been deattacted the operations is a no-op
4269   if (ThreadLocalStorage::thread() == NULL) {
4270   HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4271     return JNI_OK;
4272   }
4273 
4274   JavaThread* thread = JavaThread::current();
4275   if (thread->has_last_Java_frame()) {
4276   HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN((uint32_t) JNI_ERR);
4277     // Can't detach a thread that's running java, that can't work.
4278     return JNI_ERR;
4279   }
4280 
4281   // Safepoint support. Have to do call-back to safepoint code, if in the
4282   // middel of a safepoint operation
4283   ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
4284 
4285   // XXX: Note that JavaThread::exit() call below removes the guards on the
4286   // stack pages set up via enable_stack_{red,yellow}_zone() calls
4287   // above in jni_AttachCurrentThread. Unfortunately, while the setting
4288   // of the guards is visible in jni_AttachCurrentThread above,
4289   // the removal of the guards is buried below in JavaThread::exit()
4290   // here. The abstraction should be more symmetrically either exposed
4291   // or hidden (e.g. it could probably be hidden in the same
4292   // (platform-dependent) methods where we do alternate stack
4293   // maintenance work?)
4294   thread->exit(false, JavaThread::jni_detach);
4295   delete thread;
4296 
4297   HOTSPOT_JNI_DETACHCURRENTTHREAD_RETURN(JNI_OK);
4298   return JNI_OK;
4299 }
4300 
4301 DT_RETURN_MARK_DECL(GetEnv, jint
4302                     , HOTSPOT_JNI_GETENV_RETURN(_ret_ref));
4303 
4304 jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
4305   HOTSPOT_JNI_GETENV_ENTRY(vm, penv, version);
4306   jint ret = JNI_ERR;
4307   DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
4308 
4309   if (!vm_created) {
4310     *penv = NULL;
4311     ret = JNI_EDETACHED;
4312     return ret;
4313   }
4314 
4315   if (JniExportedInterface::GetExportedInterface(vm, penv, version, &ret)) {
4316     return ret;
4317   }
4318 
4319 #ifndef JVMPI_VERSION_1
4320 // need these in order to be polite about older agents
4321 #define JVMPI_VERSION_1   ((jint)0x10000001)
4322 #define JVMPI_VERSION_1_1 ((jint)0x10000002)
4323 #define JVMPI_VERSION_1_2 ((jint)0x10000003)
4324 #endif // !JVMPI_VERSION_1
4325 
4326   Thread* thread = ThreadLocalStorage::thread();
4327   if (thread != NULL && thread->is_Java_thread()) {
4328     if (Threads::is_supported_jni_version_including_1_1(version)) {
4329       *(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
4330       ret = JNI_OK;
4331       return ret;
4332 
4333     } else if (version == JVMPI_VERSION_1 ||
4334                version == JVMPI_VERSION_1_1 ||
4335                version == JVMPI_VERSION_1_2) {
4336       tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
4337       tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4338       ret = JNI_EVERSION;
4339       return ret;
4340     } else if (JvmtiExport::is_jvmdi_version(version)) {
4341       tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
4342       tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
4343       ret = JNI_EVERSION;
4344       return ret;
4345     } else {
4346       *penv = NULL;
4347       ret = JNI_EVERSION;
4348       return ret;
4349     }
4350   } else {
4351     *penv = NULL;
4352     ret = JNI_EDETACHED;
4353     return ret;
4354   }
4355 }
4356 
4357 
4358 jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
4359   HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_ENTRY(vm, penv, _args);
4360   if (!vm_created) {
4361   HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN((uint32_t) JNI_ERR);
4362     return JNI_ERR;
4363   }
4364 
4365   JNIWrapper("AttachCurrentThreadAsDaemon");
4366   jint ret = attach_current_thread(vm, penv, _args, true);
4367   HOTSPOT_JNI_ATTACHCURRENTTHREADASDAEMON_RETURN(ret);
4368   return ret;
4369 }
4370 
4371 
4372 } // End extern "C"
4373 
4374 const struct JNIInvokeInterface_ jni_InvokeInterface = {
4375     NULL,
4376     NULL,
4377     NULL,
4378 
4379     jni_DestroyJavaVM,
4380     jni_AttachCurrentThread,
4381     jni_DetachCurrentThread,
4382     jni_GetEnv,
4383     jni_AttachCurrentThreadAsDaemon
4384 };