Mercurial > jdk8-mips64-public > hotspot / file revision

 /*

  * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

  *

  * This code is free software; you can redistribute it and/or modify it

  * under the terms of the GNU General Public License version 2 only, as

  * published by the Free Software Foundation.

  *

  * This code is distributed in the hope that it will be useful, but WITHOUT

  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

  * version 2 for more details (a copy is included in the LICENSE file that

  * accompanied this code).

  *

  * You should have received a copy of the GNU General Public License version

  * 2 along with this work; if not, write to the Free Software Foundation,

  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

  *

  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

  * or visit www.oracle.com if you need additional information or have any

  * questions.

  *

  */

 #include "precompiled.hpp"

 #include "classfile/classLoader.hpp"

 #include "classfile/javaClasses.hpp"

 #include "classfile/symbolTable.hpp"

 #include "classfile/systemDictionary.hpp"

 #include "classfile/vmSymbols.hpp"

 #include "interpreter/linkResolver.hpp"

 #include "memory/allocation.inline.hpp"

 #include "memory/gcLocker.inline.hpp"

 #include "memory/oopFactory.hpp"

 #include "memory/universe.inline.hpp"

 #include "oops/instanceKlass.hpp"

 #include "oops/instanceOop.hpp"

 #include "oops/markOop.hpp"

 #include "oops/methodOop.hpp"

 #include "oops/objArrayKlass.hpp"

 #include "oops/objArrayOop.hpp"

 #include "oops/oop.inline.hpp"

 #include "oops/symbol.hpp"

 #include "oops/typeArrayKlass.hpp"

 #include "oops/typeArrayOop.hpp"

 #include "prims/jni.h"

 #include "prims/jniCheck.hpp"

 #include "prims/jniFastGetField.hpp"

 #include "prims/jvm.h"

 #include "prims/jvm_misc.hpp"

 #include "prims/jvmtiExport.hpp"

 #include "prims/jvmtiThreadState.hpp"

 #include "runtime/compilationPolicy.hpp"

 #include "runtime/fieldDescriptor.hpp"

 #include "runtime/fprofiler.hpp"

 #include "runtime/handles.inline.hpp"

 #include "runtime/interfaceSupport.hpp"

 #include "runtime/java.hpp"

 #include "runtime/javaCalls.hpp"

 #include "runtime/jfieldIDWorkaround.hpp"

 #include "runtime/reflection.hpp"

 #include "runtime/sharedRuntime.hpp"

 #include "runtime/signature.hpp"

 #include "runtime/vm_operations.hpp"

 #include "services/runtimeService.hpp"

 #include "utilities/defaultStream.hpp"

 #include "utilities/dtrace.hpp"

 #include "utilities/events.hpp"

 #include "utilities/histogram.hpp"

 #ifdef TARGET_ARCH_x86

 # include "jniTypes_x86.hpp"

 #endif

 #ifdef TARGET_ARCH_sparc

 # include "jniTypes_sparc.hpp"

 #endif

 #ifdef TARGET_ARCH_zero

 # include "jniTypes_zero.hpp"

 #endif

 #ifdef TARGET_OS_FAMILY_linux

 # include "os_linux.inline.hpp"

 # include "thread_linux.inline.hpp"

 #endif

 #ifdef TARGET_OS_FAMILY_solaris

 # include "os_solaris.inline.hpp"

 # include "thread_solaris.inline.hpp"

 #endif

 #ifdef TARGET_OS_FAMILY_windows

 # include "os_windows.inline.hpp"

 # include "thread_windows.inline.hpp"

 #endif

 static jint CurrentVersion = JNI_VERSION_1_6;

 // The DT_RETURN_MARK macros create a scoped object to fire the dtrace

 // '-return' probe regardless of the return path is taken out of the function.

 // Methods that have multiple return paths use this to avoid having to

 // instrument each return path.  Methods that use CHECK or THROW must use this

 // since those macros can cause an immedate uninstrumented return.

 //

 // In order to get the return value, a reference to the variable containing

 // the return value must be passed to the contructor of the object, and

 // the return value must be set before return (since the mark object has

 // a reference to it).

 //

 // Example:

 // DT_RETURN_MARK_DECL(SomeFunc, int);

 // JNI_ENTRY(int, SomeFunc, ...)

 //   int return_value = 0;

 //   DT_RETURN_MARK(SomeFunc, int, (const int&)return_value);

 //   foo(CHECK_0)

 //   return_value = 5;

 //   return return_value;

 // JNI_END

 #define DT_RETURN_MARK_DECL(name, type)                                    \

   HS_DTRACE_PROBE_DECL1(hotspot_jni, name##__return, type);                \

   DTRACE_ONLY(                                                             \

     class DTraceReturnProbeMark_##name {                                   \

      public:                                                               \

       const type& _ret_ref;                                                \

       DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {}         \

       ~DTraceReturnProbeMark_##name() {                                    \

         HS_DTRACE_PROBE1(hotspot_jni, name##__return, _ret_ref);           \

       }                                                                    \

     }                                                                      \

   )

 // Void functions are simpler since there's no return value

 #define DT_VOID_RETURN_MARK_DECL(name)                                     \

   HS_DTRACE_PROBE_DECL0(hotspot_jni, name##__return);                      \

   DTRACE_ONLY(                                                             \

     class DTraceReturnProbeMark_##name {                                   \

      public:                                                               \

       ~DTraceReturnProbeMark_##name() {                                    \

         HS_DTRACE_PROBE0(hotspot_jni, name##__return);                     \

       }                                                                    \

     }                                                                      \

   )

 // Place these macros in the function to mark the return.  Non-void

 // functions need the type and address of the return value.

 #define DT_RETURN_MARK(name, type, ref) \

   DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) )

 #define DT_VOID_RETURN_MARK(name) \

   DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark )

 // Use these to select distinct code for floating-point vs. non-floating point

 // situations.  Used from within common macros where we need slightly

 // different behavior for Float/Double

 #define FP_SELECT_Boolean(intcode, fpcode) intcode

 #define FP_SELECT_Byte(intcode, fpcode)    intcode

 #define FP_SELECT_Char(intcode, fpcode)    intcode

 #define FP_SELECT_Short(intcode, fpcode)   intcode

 #define FP_SELECT_Object(intcode, fpcode)  intcode

 #define FP_SELECT_Int(intcode, fpcode)     intcode

 #define FP_SELECT_Long(intcode, fpcode)    intcode

 #define FP_SELECT_Float(intcode, fpcode)   fpcode

 #define FP_SELECT_Double(intcode, fpcode)  fpcode

 #define FP_SELECT(TypeName, intcode, fpcode) \

   FP_SELECT_##TypeName(intcode, fpcode)

 #define COMMA ,

 // Choose DT_RETURN_MARK macros  based on the type: float/double -> void

 // (dtrace doesn't do FP yet)

 #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type) \

   FP_SELECT(TypeName, \

     DT_RETURN_MARK_DECL(name, type), DT_VOID_RETURN_MARK_DECL(name) )

 #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \

   FP_SELECT(TypeName, \

     DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) )

 // out-of-line helpers for class jfieldIDWorkaround:

 bool jfieldIDWorkaround::is_valid_jfieldID(klassOop k, jfieldID id) {

   if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) {

     uintptr_t as_uint = (uintptr_t) id;

     intptr_t offset = raw_instance_offset(id);

     if (is_checked_jfieldID(id)) {

       if (!klass_hash_ok(k, id)) {

         return false;

       }

     }

     return instanceKlass::cast(k)->contains_field_offset(offset);

   } else {

     JNIid* result = (JNIid*) id;

 #ifdef ASSERT

     return result != NULL && result->is_static_field_id();

 #else

     return result != NULL;

 #endif

   }

 }

 intptr_t jfieldIDWorkaround::encode_klass_hash(klassOop k, intptr_t offset) {

   if (offset <= small_offset_mask) {

     klassOop field_klass = k;

     klassOop super_klass = Klass::cast(field_klass)->super();

     // With compressed oops the most super class with nonstatic fields would

     // be the owner of fields embedded in the header.

     while (instanceKlass::cast(super_klass)->has_nonstatic_fields() &&

            instanceKlass::cast(super_klass)->contains_field_offset(offset)) {

       field_klass = super_klass;   // super contains the field also

       super_klass = Klass::cast(field_klass)->super();

     }

     debug_only(No_Safepoint_Verifier nosafepoint;)

     uintptr_t klass_hash = field_klass->identity_hash();

     return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place;

   } else {

 #if 0

     #ifndef PRODUCT

     {

       ResourceMark rm;

       warning("VerifyJNIFields: long offset %d in %s", offset, Klass::cast(k)->external_name());

     }

     #endif

 #endif

     return 0;

   }

 }

 bool jfieldIDWorkaround::klass_hash_ok(klassOop k, jfieldID id) {

   uintptr_t as_uint = (uintptr_t) id;

   intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask;

   do {

     debug_only(No_Safepoint_Verifier nosafepoint;)

     // Could use a non-blocking query for identity_hash here...

     if ((k->identity_hash() & klass_mask) == klass_hash)

       return true;

     k = Klass::cast(k)->super();

   } while (k != NULL);

   return false;

 }

 void jfieldIDWorkaround::verify_instance_jfieldID(klassOop k, jfieldID id) {

   guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" );

   uintptr_t as_uint = (uintptr_t) id;

   intptr_t offset = raw_instance_offset(id);

   if (VerifyJNIFields) {

     if (is_checked_jfieldID(id)) {

       guarantee(klass_hash_ok(k, id),

     "Bug in native code: jfieldID class must match object");

     } else {

 #if 0

       #ifndef PRODUCT

       if (Verbose) {

   ResourceMark rm;

   warning("VerifyJNIFields: unverified offset %d for %s", offset, Klass::cast(k)->external_name());

       }

       #endif

 #endif

     }

   }

   guarantee(instanceKlass::cast(k)->contains_field_offset(offset),

       "Bug in native code: jfieldID offset must address interior of object");

 }

 // Pick a reasonable higher bound for local capacity requested

 // for EnsureLocalCapacity and PushLocalFrame.  We don't want it too

 // high because a test (or very unusual application) may try to allocate

 // that many handles and run out of swap space.  An implementation is

 // permitted to allocate more handles than the ensured capacity, so this

 // value is set high enough to prevent compatibility problems.

 const int MAX_REASONABLE_LOCAL_CAPACITY = 4*K;

 // Wrapper to trace JNI functions

 #ifdef ASSERT

   Histogram* JNIHistogram;

   static volatile jint JNIHistogram_lock = 0;

   class JNITraceWrapper : public StackObj {

    public:

     JNITraceWrapper(const char* format, ...) {

       if (TraceJNICalls) {

         va_list ap;

         va_start(ap, format);

         tty->print("JNI ");

         tty->vprint_cr(format, ap);

         va_end(ap);

       }

     }

   };

   class JNIHistogramElement : public HistogramElement {

     public:

      JNIHistogramElement(const char* name);

   };

   JNIHistogramElement::JNIHistogramElement(const char* elementName) {

     _name = elementName;

     uintx count = 0;

     while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) {

       while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) {

         count +=1;

         if ( (WarnOnStalledSpinLock > 0)

           && (count % WarnOnStalledSpinLock == 0)) {

           warning("JNIHistogram_lock seems to be stalled");

         }

       }

      }

     if(JNIHistogram == NULL)

       JNIHistogram = new Histogram("JNI Call Counts",100);

     JNIHistogram->add_element(this);

     Atomic::dec(&JNIHistogram_lock);

   }

   #define JNICountWrapper(arg)                                     \

      static JNIHistogramElement* e = new JNIHistogramElement(arg); \

       /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \

      if (e != NULL) e->increment_count()

   #define JNIWrapper(arg) JNICountWrapper(arg); JNITraceWrapper(arg)

 #else

   #define JNIWrapper(arg)

 #endif

 // Implementation of JNI entries

 DT_RETURN_MARK_DECL(DefineClass, jclass);

 JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef,

                                   const jbyte *buf, jsize bufLen))

   JNIWrapper("DefineClass");

   DTRACE_PROBE5(hotspot_jni, DefineClass__entry,

     env, name, loaderRef, buf, bufLen);

   jclass cls = NULL;

   DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls);

   // Since exceptions can be thrown, class initialization can take place

   // if name is NULL no check for class name in .class stream has to be made.

   if (name != NULL) {

     const int str_len = (int)strlen(name);

     if (str_len > Symbol::max_length()) {

       // It's impossible to create this class;  the name cannot fit

       // into the constant pool.

       THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);

     }

   }

   TempNewSymbol class_name = SymbolTable::new_symbol(name, THREAD);

   ResourceMark rm(THREAD);

   ClassFileStream st((u1*) buf, bufLen, NULL);

   Handle class_loader (THREAD, JNIHandles::resolve(loaderRef));

   if (UsePerfData && !class_loader.is_null()) {

     // check whether the current caller thread holds the lock or not.

     // If not, increment the corresponding counter

     if (ObjectSynchronizer::

         query_lock_ownership((JavaThread*)THREAD, class_loader) !=

         ObjectSynchronizer::owner_self) {

       ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc();

     }

   }

   klassOop k = SystemDictionary::resolve_from_stream(class_name, class_loader,

                                                      Handle(), &st, true,

                                                      CHECK_NULL);

   if (TraceClassResolution && k != NULL) {

     trace_class_resolution(k);

   }

   cls = (jclass)JNIHandles::make_local(

     env, Klass::cast(k)->java_mirror());

   return cls;

 JNI_END

 static bool first_time_FindClass = true;

 DT_RETURN_MARK_DECL(FindClass, jclass);

 JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name))

   JNIWrapper("FindClass");

   DTRACE_PROBE2(hotspot_jni, FindClass__entry, env, name);

   jclass result = NULL;

   DT_RETURN_MARK(FindClass, jclass, (const jclass&)result);

   // Remember if we are the first invocation of jni_FindClass

   bool first_time = first_time_FindClass;

   first_time_FindClass = false;

   // Sanity check the name:  it cannot be null or larger than the maximum size

   // name we can fit in the constant pool.

   if (name == NULL || (int)strlen(name) > Symbol::max_length()) {

     THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);

   }

   //%note jni_3

   Handle loader;

   Handle protection_domain;

   // Find calling class

   instanceKlassHandle k (THREAD, thread->security_get_caller_class(0));

   if (k.not_null()) {

     loader = Handle(THREAD, k->class_loader());

     // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed

     // in the correct class context.

     if (loader.is_null() &&

         k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) {

       JavaValue result(T_OBJECT);

       JavaCalls::call_static(&result, k,

                                       vmSymbols::getFromClass_name(),

                                       vmSymbols::void_class_signature(),

                                       thread);

       if (HAS_PENDING_EXCEPTION) {

         Handle ex(thread, thread->pending_exception());

         CLEAR_PENDING_EXCEPTION;

         THROW_HANDLE_0(ex);

       }

       oop mirror = (oop) result.get_jobject();

       loader = Handle(THREAD,

         instanceKlass::cast(java_lang_Class::as_klassOop(mirror))->class_loader());

       protection_domain = Handle(THREAD,

         instanceKlass::cast(java_lang_Class::as_klassOop(mirror))->protection_domain());

     }

   } else {

     // We call ClassLoader.getSystemClassLoader to obtain the system class loader.

     loader = Handle(THREAD, SystemDictionary::java_system_loader());

   }

   TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL);

   result = find_class_from_class_loader(env, sym, true, loader,

                                         protection_domain, true, thread);

   if (TraceClassResolution && result != NULL) {

     trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result)));

   }

   // If we were the first invocation of jni_FindClass, we enable compilation again

   // rather than just allowing invocation counter to overflow and decay.

   // Controlled by flag DelayCompilationDuringStartup.

   if (first_time && !CompileTheWorld)

     CompilationPolicy::completed_vm_startup();

   return result;

 JNI_END

 DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID);

 JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method))

   JNIWrapper("FromReflectedMethod");

   DTRACE_PROBE2(hotspot_jni, FromReflectedMethod__entry, env, method);

   jmethodID ret = NULL;

   DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret);

   // method is a handle to a java.lang.reflect.Method object

   oop reflected  = JNIHandles::resolve_non_null(method);

   oop mirror     = NULL;

   int slot       = 0;

   if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {

     mirror = java_lang_reflect_Constructor::clazz(reflected);

     slot   = java_lang_reflect_Constructor::slot(reflected);

   } else {

     assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type");

     mirror = java_lang_reflect_Method::clazz(reflected);

     slot   = java_lang_reflect_Method::slot(reflected);

   }

   klassOop k     = java_lang_Class::as_klassOop(mirror);

   KlassHandle k1(THREAD, k);

   // Make sure class is initialized before handing id's out to methods

   Klass::cast(k1())->initialize(CHECK_NULL);

   methodOop m = instanceKlass::cast(k1())->method_with_idnum(slot);

   ret = m==NULL? NULL : m->jmethod_id();  // return NULL if reflected method deleted

   return ret;

 JNI_END

 DT_RETURN_MARK_DECL(FromReflectedField, jfieldID);

 JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field))

   JNIWrapper("FromReflectedField");

   DTRACE_PROBE2(hotspot_jni, FromReflectedField__entry, env, field);

   jfieldID ret = NULL;

   DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret);

   // field is a handle to a java.lang.reflect.Field object

   oop reflected   = JNIHandles::resolve_non_null(field);

   oop mirror      = java_lang_reflect_Field::clazz(reflected);

   klassOop k      = java_lang_Class::as_klassOop(mirror);

   int slot        = java_lang_reflect_Field::slot(reflected);

   int modifiers   = java_lang_reflect_Field::modifiers(reflected);

   KlassHandle k1(THREAD, k);

   // Make sure class is initialized before handing id's out to fields

   Klass::cast(k1())->initialize(CHECK_NULL);

   // First check if this is a static field

   if (modifiers & JVM_ACC_STATIC) {

     intptr_t offset = instanceKlass::cast(k1())->offset_from_fields( slot );

     JNIid* id = instanceKlass::cast(k1())->jni_id_for(offset);

     assert(id != NULL, "corrupt Field object");

     debug_only(id->set_is_static_field_id();)

     // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the klassOop

     ret = jfieldIDWorkaround::to_static_jfieldID(id);

     return ret;

   }

   // The slot is the index of the field description in the field-array

   // The jfieldID is the offset of the field within the object

   // It may also have hash bits for k, if VerifyJNIFields is turned on.

   intptr_t offset = instanceKlass::cast(k1())->offset_from_fields( slot );

   assert(instanceKlass::cast(k1())->contains_field_offset(offset), "stay within object");

   ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset);

   return ret;

 JNI_END

 DT_RETURN_MARK_DECL(ToReflectedMethod, jobject);

 JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic))

   JNIWrapper("ToReflectedMethod");

   DTRACE_PROBE4(hotspot_jni, ToReflectedMethod__entry, env, cls, method_id, isStatic);

   jobject ret = NULL;

   DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret);

   methodHandle m (THREAD, JNIHandles::resolve_jmethod_id(method_id));

   assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match");

   oop reflection_method;

   if (m->is_initializer()) {

     reflection_method = Reflection::new_constructor(m, CHECK_NULL);

   } else {

     reflection_method = Reflection::new_method(m, UseNewReflection, false, CHECK_NULL);

   }

   ret = JNIHandles::make_local(env, reflection_method);

   return ret;

 JNI_END

 DT_RETURN_MARK_DECL(GetSuperclass, jclass);

 JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub))

   JNIWrapper("GetSuperclass");

   DTRACE_PROBE2(hotspot_jni, GetSuperclass__entry, env, sub);

   jclass obj = NULL;

   DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj);

   oop mirror = JNIHandles::resolve_non_null(sub);

   // primitive classes return NULL

   if (java_lang_Class::is_primitive(mirror)) return NULL;

   // Rules of Class.getSuperClass as implemented by KLass::java_super:

   // arrays return Object

   // interfaces return NULL

   // proper classes return Klass::super()

   klassOop k = java_lang_Class::as_klassOop(mirror);

   if (Klass::cast(k)->is_interface()) return NULL;

   // return mirror for superclass

   klassOop super = Klass::cast(k)->java_super();

   // super2 is the value computed by the compiler's getSuperClass intrinsic:

   debug_only(klassOop super2 = ( Klass::cast(k)->oop_is_javaArray()

                                  ? SystemDictionary::Object_klass()

                                  : Klass::cast(k)->super() ) );

   assert(super == super2,

          "java_super computation depends on interface, array, other super");

   obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(Klass::cast(super)->java_mirror());

   return obj;

 JNI_END

 JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super))

   JNIWrapper("IsSubclassOf");

   DTRACE_PROBE3(hotspot_jni, IsAssignableFrom__entry, env, sub, super);

   oop sub_mirror   = JNIHandles::resolve_non_null(sub);

   oop super_mirror = JNIHandles::resolve_non_null(super);

   if (java_lang_Class::is_primitive(sub_mirror) ||

       java_lang_Class::is_primitive(super_mirror)) {

     jboolean ret = (sub_mirror == super_mirror);

     DTRACE_PROBE1(hotspot_jni, IsAssignableFrom__return, ret);

     return ret;

   }

   klassOop sub_klass   = java_lang_Class::as_klassOop(sub_mirror);

   klassOop super_klass = java_lang_Class::as_klassOop(super_mirror);

   assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom");

   jboolean ret = Klass::cast(sub_klass)->is_subtype_of(super_klass) ?

                    JNI_TRUE : JNI_FALSE;

   DTRACE_PROBE1(hotspot_jni, IsAssignableFrom__return, ret);

   return ret;

 JNI_END

 DT_RETURN_MARK_DECL(Throw, jint);

 JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj))

   JNIWrapper("Throw");

   DTRACE_PROBE2(hotspot_jni, Throw__entry, env, obj);

   jint ret = JNI_OK;

   DT_RETURN_MARK(Throw, jint, (const jint&)ret);

   THROW_OOP_(JNIHandles::resolve(obj), JNI_OK);

   ShouldNotReachHere();

 JNI_END

 DT_RETURN_MARK_DECL(ThrowNew, jint);

 JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message))

   JNIWrapper("ThrowNew");

   DTRACE_PROBE3(hotspot_jni, ThrowNew__entry, env, clazz, message);

   jint ret = JNI_OK;

   DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret);

   instanceKlass* k = instanceKlass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz)));

   Symbol*  name = k->name();

   Handle class_loader (THREAD,  k->class_loader());

   Handle protection_domain (THREAD, k->protection_domain());

   THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK);

   ShouldNotReachHere();

 JNI_END

 // JNI functions only transform a pending async exception to a synchronous

 // exception in ExceptionOccurred and ExceptionCheck calls, since

 // delivering an async exception in other places won't change the native

 // code's control flow and would be harmful when native code further calls

 // JNI functions with a pending exception. Async exception is also checked

 // during the call, so ExceptionOccurred/ExceptionCheck won't return

 // false but deliver the async exception at the very end during

 // state transition.

 static void jni_check_async_exceptions(JavaThread *thread) {

   assert(thread == Thread::current(), "must be itself");

   thread->check_and_handle_async_exceptions();

 }

 JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env))

   JNIWrapper("ExceptionOccurred");

   DTRACE_PROBE1(hotspot_jni, ExceptionOccurred__entry, env);

   jni_check_async_exceptions(thread);

   oop exception = thread->pending_exception();

   jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception);

   DTRACE_PROBE1(hotspot_jni, ExceptionOccurred__return, ret);

   return ret;

 JNI_END

 JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env))

   JNIWrapper("ExceptionDescribe");

   DTRACE_PROBE1(hotspot_jni, ExceptionDescribe__entry, env);

   if (thread->has_pending_exception()) {

     Handle ex(thread, thread->pending_exception());

     thread->clear_pending_exception();

     if (ex->is_a(SystemDictionary::ThreadDeath_klass())) {

       // Don't print anything if we are being killed.

     } else {

       jio_fprintf(defaultStream::error_stream(), "Exception ");

       if (thread != NULL && thread->threadObj() != NULL) {

         ResourceMark rm(THREAD);

         jio_fprintf(defaultStream::error_stream(),

         "in thread \"%s\" ", thread->get_thread_name());

       }

       if (ex->is_a(SystemDictionary::Throwable_klass())) {

         JavaValue result(T_VOID);

         JavaCalls::call_virtual(&result,

                                 ex,

                                 KlassHandle(THREAD,

                                   SystemDictionary::Throwable_klass()),

                                 vmSymbols::printStackTrace_name(),

                                 vmSymbols::void_method_signature(),

                                 THREAD);

         // If an exception is thrown in the call it gets thrown away. Not much

         // we can do with it. The native code that calls this, does not check

         // for the exception - hence, it might still be in the thread when DestroyVM gets

         // called, potentially causing a few asserts to trigger - since no pending exception

         // is expected.

         CLEAR_PENDING_EXCEPTION;

       } else {

         ResourceMark rm(THREAD);

         jio_fprintf(defaultStream::error_stream(),

         ". Uncaught exception of type %s.",

         Klass::cast(ex->klass())->external_name());

       }

     }

   }

   DTRACE_PROBE(hotspot_jni, ExceptionDescribe__return);

 JNI_END

 JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env))

   JNIWrapper("ExceptionClear");

   DTRACE_PROBE1(hotspot_jni, ExceptionClear__entry, env);

   // The jni code might be using this API to clear java thrown exception.

   // So just mark jvmti thread exception state as exception caught.

   JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state();

   if (state != NULL && state->is_exception_detected()) {

     state->set_exception_caught();

   }

   thread->clear_pending_exception();

   DTRACE_PROBE(hotspot_jni, ExceptionClear__return);

 JNI_END

 JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg))

   JNIWrapper("FatalError");

   DTRACE_PROBE2(hotspot_jni, FatalError__entry, env, msg);

   tty->print_cr("FATAL ERROR in native method: %s", msg);

   thread->print_stack();

   os::abort(); // Dump core and abort

 JNI_END

 JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity))

   JNIWrapper("PushLocalFrame");

   DTRACE_PROBE2(hotspot_jni, PushLocalFrame__entry, env, capacity);

   //%note jni_11

   if (capacity < 0 && capacity > MAX_REASONABLE_LOCAL_CAPACITY) {

     DTRACE_PROBE1(hotspot_jni, PushLocalFrame__return, JNI_ERR);

     return JNI_ERR;

   }

   JNIHandleBlock* old_handles = thread->active_handles();

   JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);

   assert(new_handles != NULL, "should not be NULL");

   new_handles->set_pop_frame_link(old_handles);

   thread->set_active_handles(new_handles);

   jint ret = JNI_OK;

   DTRACE_PROBE1(hotspot_jni, PushLocalFrame__return, ret);

   return ret;

 JNI_END

 JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result))

   JNIWrapper("PopLocalFrame");

   DTRACE_PROBE2(hotspot_jni, PopLocalFrame__entry, env, result);

   //%note jni_11

   Handle result_handle(thread, JNIHandles::resolve(result));

   JNIHandleBlock* old_handles = thread->active_handles();

   JNIHandleBlock* new_handles = old_handles->pop_frame_link();

   if (new_handles != NULL) {

     // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL.

     // This way code will still work if PopLocalFrame is called without a corresponding

     // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise

     // the release_block call will release the blocks.

     thread->set_active_handles(new_handles);

     old_handles->set_pop_frame_link(NULL);              // clear link we won't release new_handles below

     JNIHandleBlock::release_block(old_handles, thread); // may block

     result = JNIHandles::make_local(thread, result_handle());

   }

   DTRACE_PROBE1(hotspot_jni, PopLocalFrame__return, result);

   return result;

 JNI_END

 JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref))

   JNIWrapper("NewGlobalRef");

   DTRACE_PROBE2(hotspot_jni, NewGlobalRef__entry, env, ref);

   Handle ref_handle(thread, JNIHandles::resolve(ref));

   jobject ret = JNIHandles::make_global(ref_handle);

   DTRACE_PROBE1(hotspot_jni, NewGlobalRef__return, ret);

   return ret;

 JNI_END

 // Must be JNI_ENTRY (with HandleMark)

 JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref))

   JNIWrapper("DeleteGlobalRef");

   DTRACE_PROBE2(hotspot_jni, DeleteGlobalRef__entry, env, ref);

   JNIHandles::destroy_global(ref);

   DTRACE_PROBE(hotspot_jni, DeleteGlobalRef__return);

 JNI_END

 JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj))

   JNIWrapper("DeleteLocalRef");

   DTRACE_PROBE2(hotspot_jni, DeleteLocalRef__entry, env, obj);

   JNIHandles::destroy_local(obj);

   DTRACE_PROBE(hotspot_jni, DeleteLocalRef__return);

 JNI_END

 JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2))

   JNIWrapper("IsSameObject");

   DTRACE_PROBE3(hotspot_jni, IsSameObject__entry, env, r1, r2);

   oop a = JNIHandles::resolve(r1);

   oop b = JNIHandles::resolve(r2);

   jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE;

   DTRACE_PROBE1(hotspot_jni, IsSameObject__return, ret);

   return ret;

 JNI_END

 JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref))

   JNIWrapper("NewLocalRef");

   DTRACE_PROBE2(hotspot_jni, NewLocalRef__entry, env, ref);

   jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref));

   DTRACE_PROBE1(hotspot_jni, NewLocalRef__return, ret);

   return ret;

 JNI_END

 JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity))

   JNIWrapper("EnsureLocalCapacity");

   DTRACE_PROBE2(hotspot_jni, EnsureLocalCapacity__entry, env, capacity);

   jint ret;

   if (capacity >= 0 && capacity <= MAX_REASONABLE_LOCAL_CAPACITY) {

     ret = JNI_OK;

   } else {

     ret = JNI_ERR;

   }

   DTRACE_PROBE1(hotspot_jni, EnsureLocalCapacity__return, ret);

   return ret;

 JNI_END

 // Return the Handle Type

 JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj))

   JNIWrapper("GetObjectRefType");

   DTRACE_PROBE2(hotspot_jni, GetObjectRefType__entry, env, obj);

   jobjectRefType ret;

   if (JNIHandles::is_local_handle(thread, obj) ||

       JNIHandles::is_frame_handle(thread, obj))

     ret = JNILocalRefType;

   else if (JNIHandles::is_global_handle(obj))

     ret = JNIGlobalRefType;

   else if (JNIHandles::is_weak_global_handle(obj))

     ret = JNIWeakGlobalRefType;

   else

     ret = JNIInvalidRefType;

   DTRACE_PROBE1(hotspot_jni, GetObjectRefType__return, ret);

   return ret;

 JNI_END

 class JNI_ArgumentPusher : public SignatureIterator {

  protected:

   JavaCallArguments*  _arguments;

   virtual void get_bool   () = 0;

   virtual void get_char   () = 0;

   virtual void get_short  () = 0;

   virtual void get_byte   () = 0;

   virtual void get_int    () = 0;

   virtual void get_long   () = 0;

   virtual void get_float  () = 0;

   virtual void get_double () = 0;

   virtual void get_object () = 0;

   JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) {

     this->_return_type = T_ILLEGAL;

     _arguments = NULL;

   }

  public:

   virtual void iterate( uint64_t fingerprint ) = 0;

   void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; }

   inline void do_bool()                     { if (!is_return_type()) get_bool();   }

   inline void do_char()                     { if (!is_return_type()) get_char();   }

   inline void do_short()                    { if (!is_return_type()) get_short();  }

   inline void do_byte()                     { if (!is_return_type()) get_byte();   }

   inline void do_int()                      { if (!is_return_type()) get_int();    }

   inline void do_long()                     { if (!is_return_type()) get_long();   }

   inline void do_float()                    { if (!is_return_type()) get_float();  }

   inline void do_double()                   { if (!is_return_type()) get_double(); }

   inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); }

   inline void do_array(int begin, int end)  { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array

   inline void do_void()                     { }

   JavaCallArguments* arguments()     { return _arguments; }

   void push_receiver(Handle h)       { _arguments->push_oop(h); }

 };

 class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher {

  protected:

   va_list _ap;

   inline void get_bool()   { _arguments->push_int(va_arg(_ap, jint)); } // bool is coerced to int when using va_arg

   inline void get_char()   { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg

   inline void get_short()  { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg

   inline void get_byte()   { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg

   inline void get_int()    { _arguments->push_int(va_arg(_ap, jint)); }

   // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests

   inline void get_long()   { _arguments->push_long(va_arg(_ap, jlong)); }

   inline void get_float()  { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg

   inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); }

   inline void get_object() { jobject l = va_arg(_ap, jobject);

                              _arguments->push_oop(Handle((oop *)l, false)); }

   inline void set_ap(va_list rap) {

 #ifdef va_copy

     va_copy(_ap, rap);

 #elif defined (__va_copy)

     __va_copy(_ap, rap);

 #else

     _ap = rap;

 #endif

   }

  public:

   JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap)

        : JNI_ArgumentPusher(signature) {

     set_ap(rap);

   }

   JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap)

       : JNI_ArgumentPusher(JNIHandles::resolve_jmethod_id(method_id)->signature()) {

     set_ap(rap);

   }

   // Optimized path if we have the bitvector form of signature

   void iterate( uint64_t fingerprint ) {

     if ( fingerprint == UCONST64(-1) ) SignatureIterator::iterate();// Must be too many arguments

     else {

       _return_type = (BasicType)((fingerprint >> static_feature_size) &

                                   result_feature_mask);

       assert(fingerprint, "Fingerprint should not be 0");

       fingerprint = fingerprint >> (static_feature_size + result_feature_size);

       while ( 1 ) {

         switch ( fingerprint & parameter_feature_mask ) {

           case bool_parm:

           case char_parm:

           case short_parm:

           case byte_parm:

           case int_parm:

             get_int();

             break;

           case obj_parm:

             get_object();

             break;

           case long_parm:

             get_long();

             break;

           case float_parm:

             get_float();

             break;

           case double_parm:

             get_double();

             break;

           case done_parm:

             return;

             break;

           default:

             ShouldNotReachHere();

             break;

         }

         fingerprint >>= parameter_feature_size;

       }

     }

   }

 };

 class JNI_ArgumentPusherArray : public JNI_ArgumentPusher {

  protected:

   const jvalue *_ap;

   inline void get_bool()   { _arguments->push_int((jint)(_ap++)->z); }

   inline void get_char()   { _arguments->push_int((jint)(_ap++)->c); }

   inline void get_short()  { _arguments->push_int((jint)(_ap++)->s); }

   inline void get_byte()   { _arguments->push_int((jint)(_ap++)->b); }

   inline void get_int()    { _arguments->push_int((jint)(_ap++)->i); }

   inline void get_long()   { _arguments->push_long((_ap++)->j);  }

   inline void get_float()  { _arguments->push_float((_ap++)->f); }

   inline void get_double() { _arguments->push_double((_ap++)->d);}

   inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); }

   inline void set_ap(const jvalue *rap) { _ap = rap; }

  public:

   JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap)

        : JNI_ArgumentPusher(signature) {

     set_ap(rap);

   }

   JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap)

       : JNI_ArgumentPusher(JNIHandles::resolve_jmethod_id(method_id)->signature()) {

     set_ap(rap);

   }

   // Optimized path if we have the bitvector form of signature

   void iterate( uint64_t fingerprint ) {

     if ( fingerprint == UCONST64(-1) ) SignatureIterator::iterate(); // Must be too many arguments

     else {

       _return_type = (BasicType)((fingerprint >> static_feature_size) &

                                   result_feature_mask);

       assert(fingerprint, "Fingerprint should not be 0");

       fingerprint = fingerprint >> (static_feature_size + result_feature_size);

       while ( 1 ) {

         switch ( fingerprint & parameter_feature_mask ) {

           case bool_parm:

             get_bool();

             break;

           case char_parm:

             get_char();

             break;

           case short_parm:

             get_short();

             break;

           case byte_parm:

             get_byte();

             break;

           case int_parm:

             get_int();

             break;

           case obj_parm:

             get_object();

             break;

           case long_parm:

             get_long();

             break;

           case float_parm:

             get_float();

             break;

           case double_parm:

             get_double();

             break;

           case done_parm:

             return;

             break;

           default:

             ShouldNotReachHere();

             break;

         }

         fingerprint >>= parameter_feature_size;

       }

     }

   }

 };

 enum JNICallType {

   JNI_STATIC,

   JNI_VIRTUAL,

   JNI_NONVIRTUAL

 };

 static methodHandle jni_resolve_interface_call(Handle recv, methodHandle method, TRAPS) {

   assert(!method.is_null() , "method should not be null");

   KlassHandle recv_klass; // Default to NULL (use of ?: can confuse gcc)

   if (recv.not_null()) recv_klass = KlassHandle(THREAD, recv->klass());

   KlassHandle spec_klass (THREAD, method->method_holder());

   Symbol*  name  = method->name();

   Symbol*  signature  = method->signature();

   CallInfo info;

   LinkResolver::resolve_interface_call(info, recv, recv_klass,  spec_klass, name, signature, KlassHandle(), false, true, CHECK_(methodHandle()));

   return info.selected_method();

 }

 static methodHandle jni_resolve_virtual_call(Handle recv, methodHandle method, TRAPS) {

   assert(!method.is_null() , "method should not be null");

   KlassHandle recv_klass; // Default to NULL (use of ?: can confuse gcc)

   if (recv.not_null()) recv_klass = KlassHandle(THREAD, recv->klass());

   KlassHandle spec_klass (THREAD, method->method_holder());

   Symbol*  name  = method->name();

   Symbol*  signature  = method->signature();

   CallInfo info;

   LinkResolver::resolve_virtual_call(info, recv, recv_klass,  spec_klass, name, signature, KlassHandle(), false, true, CHECK_(methodHandle()));

   return info.selected_method();

 }

 static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {

   methodHandle method(THREAD, JNIHandles::resolve_jmethod_id(method_id));

   // Create object to hold arguments for the JavaCall, and associate it with

   // the jni parser

   ResourceMark rm(THREAD);

   int number_of_parameters = method->size_of_parameters();

   JavaCallArguments java_args(number_of_parameters);

   args->set_java_argument_object(&java_args);

   assert(method->is_static(), "method should be static");

   // Fill out JavaCallArguments object

   args->iterate( Fingerprinter(method).fingerprint() );

   // Initialize result type

   result->set_type(args->get_ret_type());

   // Invoke the method. Result is returned as oop.

   JavaCalls::call(result, method, &java_args, CHECK);

   // Convert result

   if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {

     result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));

   }

 }

 static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) {

   oop recv = JNIHandles::resolve(receiver);

   if (recv == NULL) {

     THROW(vmSymbols::java_lang_NullPointerException());

   }

   Handle h_recv(THREAD, recv);

   int number_of_parameters;

   methodOop selected_method;

   {

     methodOop m = JNIHandles::resolve_jmethod_id(method_id);

     number_of_parameters = m->size_of_parameters();

     klassOop holder = m->method_holder();

     if (!(Klass::cast(holder))->is_interface()) {

       // non-interface call -- for that little speed boost, don't handlize

       debug_only(No_Safepoint_Verifier nosafepoint;)

       if (call_type == JNI_VIRTUAL) {

         // jni_GetMethodID makes sure class is linked and initialized

         // so m should have a valid vtable index.

         int vtbl_index = m->vtable_index();

         if (vtbl_index != methodOopDesc::nonvirtual_vtable_index) {

           klassOop k = h_recv->klass();

           // k might be an arrayKlassOop but all vtables start at

           // the same place. The cast is to avoid virtual call and assertion.

           instanceKlass *ik = (instanceKlass*)k->klass_part();

           selected_method = ik->method_at_vtable(vtbl_index);

         } else {

           // final method

           selected_method = m;

         }

       } else {

         // JNI_NONVIRTUAL call

         selected_method = m;

       }

     } else {

       // interface call

       KlassHandle h_holder(THREAD, holder);

       int itbl_index = m->cached_itable_index();

       if (itbl_index == -1) {

         itbl_index = klassItable::compute_itable_index(m);

         m->set_cached_itable_index(itbl_index);

         // the above may have grabbed a lock, 'm' and anything non-handlized can't be used again

       }

       klassOop k = h_recv->klass();

       selected_method = instanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK);

     }

   }

   methodHandle method(THREAD, selected_method);

   // Create object to hold arguments for the JavaCall, and associate it with

   // the jni parser

   ResourceMark rm(THREAD);

   JavaCallArguments java_args(number_of_parameters);

   args->set_java_argument_object(&java_args);

   // handle arguments

   assert(!method->is_static(), "method should not be static");

   args->push_receiver(h_recv); // Push jobject handle

   // Fill out JavaCallArguments object

   args->iterate( Fingerprinter(method).fingerprint() );

   // Initialize result type

   result->set_type(args->get_ret_type());

   // Invoke the method. Result is returned as oop.

   JavaCalls::call(result, method, &java_args, CHECK);

   // Convert result

   if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) {

     result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject()));

   }

 }

 static instanceOop alloc_object(jclass clazz, TRAPS) {

   KlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz)));

   Klass::cast(k())->check_valid_for_instantiation(false, CHECK_NULL);

   instanceKlass::cast(k())->initialize(CHECK_NULL);

   instanceOop ih = instanceKlass::cast(k())->allocate_instance(THREAD);

   return ih;

 }

 DT_RETURN_MARK_DECL(AllocObject, jobject);

 JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz))

   JNIWrapper("AllocObject");

   DTRACE_PROBE2(hotspot_jni, AllocObject__entry, env, clazz);

   jobject ret = NULL;

   DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret);

   instanceOop i = alloc_object(clazz, CHECK_NULL);

   ret = JNIHandles::make_local(env, i);

   return ret;

 JNI_END

 DT_RETURN_MARK_DECL(NewObjectA, jobject);

 JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args))

   JNIWrapper("NewObjectA");

   DTRACE_PROBE3(hotspot_jni, NewObjectA__entry, env, clazz, methodID);

   jobject obj = NULL;

   DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj);

   instanceOop i = alloc_object(clazz, CHECK_NULL);

   obj = JNIHandles::make_local(env, i);

   JavaValue jvalue(T_VOID);

   JNI_ArgumentPusherArray ap(methodID, args);

   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);

   return obj;

 JNI_END

 DT_RETURN_MARK_DECL(NewObjectV, jobject);

 JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args))

   JNIWrapper("NewObjectV");

   DTRACE_PROBE3(hotspot_jni, NewObjectV__entry, env, clazz, methodID);

   jobject obj = NULL;

   DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj);

   instanceOop i = alloc_object(clazz, CHECK_NULL);

   obj = JNIHandles::make_local(env, i);

   JavaValue jvalue(T_VOID);

   JNI_ArgumentPusherVaArg ap(methodID, args);

   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);

   return obj;

 JNI_END

 DT_RETURN_MARK_DECL(NewObject, jobject);

 JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...))

   JNIWrapper("NewObject");

   DTRACE_PROBE3(hotspot_jni, NewObject__entry, env, clazz, methodID);

   jobject obj = NULL;

   DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj);

   instanceOop i = alloc_object(clazz, CHECK_NULL);

   obj = JNIHandles::make_local(env, i);

   va_list args;

   va_start(args, methodID);

   JavaValue jvalue(T_VOID);

   JNI_ArgumentPusherVaArg ap(methodID, args);

   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL);

   va_end(args);

   return obj;

 JNI_END

 JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj))

   JNIWrapper("GetObjectClass");

   DTRACE_PROBE2(hotspot_jni, GetObjectClass__entry, env, obj);

   klassOop k = JNIHandles::resolve_non_null(obj)->klass();

   jclass ret =

     (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());

   DTRACE_PROBE1(hotspot_jni, GetObjectClass__return, ret);

   return ret;

 JNI_END

 JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz))

   JNIWrapper("IsInstanceOf");

   DTRACE_PROBE3(hotspot_jni, IsInstanceOf__entry, env, obj, clazz);

   jboolean ret = JNI_TRUE;

   if (obj != NULL) {

     ret = JNI_FALSE;

     klassOop k = java_lang_Class::as_klassOop(

       JNIHandles::resolve_non_null(clazz));

     if (k != NULL) {

       ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE;

     }

   }

   DTRACE_PROBE1(hotspot_jni, IsInstanceOf__return, ret);

   return ret;

 JNI_END

 static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str,

                                const char *sig, bool is_static, TRAPS) {

   // %%%% This code should probably just call into a method in the LinkResolver

   //

   // The class should have been loaded (we have an instance of the class

   // passed in) so the method and signature should already be in the symbol

   // table.  If they're not there, the method doesn't exist.

   const char *name_to_probe = (name_str == NULL)

                         ? vmSymbols::object_initializer_name()->as_C_string()

                         : name_str;

   TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe));

   TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig));

   if (name == NULL || signature == NULL) {

     THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);

   }

   // Throw a NoSuchMethodError exception if we have an instance of a

   // primitive java.lang.Class

   if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) {

     THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);

   }

   KlassHandle klass(THREAD,

                java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz)));

   // Make sure class is linked and initialized before handing id's out to

   // methodOops.

   Klass::cast(klass())->initialize(CHECK_NULL);

   methodOop m;

   if (name == vmSymbols::object_initializer_name() ||

       name == vmSymbols::class_initializer_name()) {

     // Never search superclasses for constructors

     if (klass->oop_is_instance()) {

       m = instanceKlass::cast(klass())->find_method(name, signature);

     } else {

       m = NULL;

     }

   } else {

     m = klass->lookup_method(name, signature);

     // Look up interfaces

     if (m == NULL && klass->oop_is_instance()) {

       m = instanceKlass::cast(klass())->lookup_method_in_all_interfaces(name,

                                                                    signature);

     }

   }

   if (m == NULL || (m->is_static() != is_static)) {

     THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str);

   }

   return m->jmethod_id();

 }

 JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz,

           const char *name, const char *sig))

   JNIWrapper("GetMethodID");

   DTRACE_PROBE4(hotspot_jni, GetMethodID__entry, env, clazz, name, sig);

   jmethodID ret = get_method_id(env, clazz, name, sig, false, thread);

   DTRACE_PROBE1(hotspot_jni, GetMethodID__return, ret);

   return ret;

 JNI_END

 JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz,

           const char *name, const char *sig))

   JNIWrapper("GetStaticMethodID");

   DTRACE_PROBE4(hotspot_jni, GetStaticMethodID__entry, env, clazz, name, sig);

   jmethodID ret = get_method_id(env, clazz, name, sig, true, thread);

   DTRACE_PROBE1(hotspot_jni, GetStaticMethodID__return, ret);

   return ret;

 JNI_END

 //

 // Calling Methods

 //

 #define DEFINE_CALLMETHOD(ResultType, Result, Tag) \

 \

   DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType);\

   DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType);\

   DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType);\

 \

 JNI_ENTRY(ResultType, \

           jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \

   JNIWrapper("Call" XSTR(Result) "Method"); \

 \

   DTRACE_PROBE3(hotspot_jni, Call##Result##Method__entry, env, obj, methodID);\

   ResultType ret = 0;\

   DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \

                      (const ResultType&)ret);\

 \

   va_list args; \

   va_start(args, methodID); \

   JavaValue jvalue(Tag); \

   JNI_ArgumentPusherVaArg ap(methodID, args); \

   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \

   va_end(args); \

   ret = jvalue.get_##ResultType(); \

   return ret;\

 JNI_END \

 \

 \

 JNI_ENTRY(ResultType, \

           jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \

   JNIWrapper("Call" XSTR(Result) "MethodV"); \

 \

   DTRACE_PROBE3(hotspot_jni, Call##Result##MethodV__entry, env, obj, methodID);\

   ResultType ret = 0;\

   DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \

                      (const ResultType&)ret);\

 \

   JavaValue jvalue(Tag); \

   JNI_ArgumentPusherVaArg ap(methodID, args); \

   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \

   ret = jvalue.get_##ResultType(); \

   return ret;\

 JNI_END \

 \

 \

 JNI_ENTRY(ResultType, \

           jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \

   JNIWrapper("Call" XSTR(Result) "MethodA"); \

   DTRACE_PROBE3(hotspot_jni, Call##Result##MethodA__entry, env, obj, methodID);\

   ResultType ret = 0;\

   DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \

                      (const ResultType&)ret);\

 \

   JavaValue jvalue(Tag); \

   JNI_ArgumentPusherArray ap(methodID, args); \

   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \

   ret = jvalue.get_##ResultType(); \

   return ret;\

 JNI_END

 // the runtime type of subword integral basic types is integer

 DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN)

 DEFINE_CALLMETHOD(jbyte,    Byte,    T_BYTE)

 DEFINE_CALLMETHOD(jchar,    Char,    T_CHAR)

 DEFINE_CALLMETHOD(jshort,   Short,   T_SHORT)

 DEFINE_CALLMETHOD(jobject,  Object,  T_OBJECT)

 DEFINE_CALLMETHOD(jint,     Int,     T_INT)

 DEFINE_CALLMETHOD(jlong,    Long,    T_LONG)

 DEFINE_CALLMETHOD(jfloat,   Float,   T_FLOAT)

 DEFINE_CALLMETHOD(jdouble,  Double,  T_DOUBLE)

 DT_VOID_RETURN_MARK_DECL(CallVoidMethod);

 DT_VOID_RETURN_MARK_DECL(CallVoidMethodV);

 DT_VOID_RETURN_MARK_DECL(CallVoidMethodA);

 JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...))

   JNIWrapper("CallVoidMethod");

   DTRACE_PROBE3(hotspot_jni, CallVoidMethod__entry, env, obj, methodID);

   DT_VOID_RETURN_MARK(CallVoidMethod);

   va_list args;

   va_start(args, methodID);

   JavaValue jvalue(T_VOID);

   JNI_ArgumentPusherVaArg ap(methodID, args);

   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);

   va_end(args);

 JNI_END

 JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args))

   JNIWrapper("CallVoidMethodV");

   DTRACE_PROBE3(hotspot_jni, CallVoidMethodV__entry, env, obj, methodID);

   DT_VOID_RETURN_MARK(CallVoidMethodV);

   JavaValue jvalue(T_VOID);

   JNI_ArgumentPusherVaArg ap(methodID, args);

   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);

 JNI_END

 JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args))

   JNIWrapper("CallVoidMethodA");

   DTRACE_PROBE3(hotspot_jni, CallVoidMethodA__entry, env, obj, methodID);

   DT_VOID_RETURN_MARK(CallVoidMethodA);

   JavaValue jvalue(T_VOID);

   JNI_ArgumentPusherArray ap(methodID, args);

   jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK);

 JNI_END

 #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag) \

 \

   DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType);\

   DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType);\

   DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType);\

 \

 JNI_ENTRY(ResultType, \

           jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \

   JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \

 \

   DTRACE_PROBE4(hotspot_jni, CallNonvirtual##Result##Method__entry, env, obj, cls, methodID);\

   ResultType ret;\

   DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \

                      (const ResultType&)ret);\

 \

   va_list args; \

   va_start(args, methodID); \

   JavaValue jvalue(Tag); \

   JNI_ArgumentPusherVaArg ap(methodID, args); \

   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \

   va_end(args); \

   ret = jvalue.get_##ResultType(); \

   return ret;\

 JNI_END \

 \

 JNI_ENTRY(ResultType, \

           jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \

   JNIWrapper("CallNonvitual" XSTR(Result) "#MethodV"); \

   DTRACE_PROBE4(hotspot_jni, CallNonvirtual##Result##MethodV__entry, env, obj, cls, methodID);\

   ResultType ret;\

   DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \

                      (const ResultType&)ret);\

 \

   JavaValue jvalue(Tag); \

   JNI_ArgumentPusherVaArg ap(methodID, args); \

   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \

   ret = jvalue.get_##ResultType(); \

   return ret;\

 JNI_END \

 \

 JNI_ENTRY(ResultType, \

           jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \

   JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \

   DTRACE_PROBE4(hotspot_jni, CallNonvirtual##Result##MethodA__entry, env, obj, cls, methodID);\

   ResultType ret;\

   DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \

                      (const ResultType&)ret);\

 \

   JavaValue jvalue(Tag); \

   JNI_ArgumentPusherArray ap(methodID, args); \

   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \

   ret = jvalue.get_##ResultType(); \

   return ret;\

 JNI_END

 // the runtime type of subword integral basic types is integer

 DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN)

 DEFINE_CALLNONVIRTUALMETHOD(jbyte,    Byte,    T_BYTE)

 DEFINE_CALLNONVIRTUALMETHOD(jchar,    Char,    T_CHAR)

 DEFINE_CALLNONVIRTUALMETHOD(jshort,   Short,   T_SHORT)

 DEFINE_CALLNONVIRTUALMETHOD(jobject,  Object,  T_OBJECT)

 DEFINE_CALLNONVIRTUALMETHOD(jint,     Int,     T_INT)

 DEFINE_CALLNONVIRTUALMETHOD(jlong,    Long,    T_LONG)

 DEFINE_CALLNONVIRTUALMETHOD(jfloat,   Float,   T_FLOAT)

 DEFINE_CALLNONVIRTUALMETHOD(jdouble,  Double,  T_DOUBLE)

 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod);

 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV);

 DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA);

 JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...))

   JNIWrapper("CallNonvirtualVoidMethod");

   DTRACE_PROBE4(hotspot_jni, CallNonvirtualVoidMethod__entry,

                env, obj, cls, methodID);

   DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod);

   va_list args;

   va_start(args, methodID);

   JavaValue jvalue(T_VOID);

   JNI_ArgumentPusherVaArg ap(methodID, args);

   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);

   va_end(args);

 JNI_END

 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args))

   JNIWrapper("CallNonvirtualVoidMethodV");

   DTRACE_PROBE4(hotspot_jni, CallNonvirtualVoidMethodV__entry,

                env, obj, cls, methodID);

   DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV);

   JavaValue jvalue(T_VOID);

   JNI_ArgumentPusherVaArg ap(methodID, args);

   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);

 JNI_END

 JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args))

   JNIWrapper("CallNonvirtualVoidMethodA");

   DTRACE_PROBE4(hotspot_jni, CallNonvirtualVoidMethodA__entry,

                 env, obj, cls, methodID);

   DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA);

   JavaValue jvalue(T_VOID);

   JNI_ArgumentPusherArray ap(methodID, args);

   jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK);

 JNI_END

 #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag) \

 \

   DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType);\

   DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType);\

   DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType);\

 \

 JNI_ENTRY(ResultType, \

           jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \

   JNIWrapper("CallStatic" XSTR(Result) "Method"); \

 \

   DTRACE_PROBE3(hotspot_jni, CallStatic##Result##Method__entry, env, cls, methodID);\

   ResultType ret = 0;\

   DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \

                      (const ResultType&)ret);\

 \

   va_list args; \

   va_start(args, methodID); \

   JavaValue jvalue(Tag); \

   JNI_ArgumentPusherVaArg ap(methodID, args); \

   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \

   va_end(args); \

   ret = jvalue.get_##ResultType(); \

   return ret;\

 JNI_END \

 \

 JNI_ENTRY(ResultType, \

           jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \

   JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \

   DTRACE_PROBE3(hotspot_jni, CallStatic##Result##MethodV__entry, env, cls, methodID);\

   ResultType ret = 0;\

   DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \

                      (const ResultType&)ret);\

 \

   JavaValue jvalue(Tag); \

   JNI_ArgumentPusherVaArg ap(methodID, args); \

   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \

   ret = jvalue.get_##ResultType(); \

   return ret;\

 JNI_END \

 \

 JNI_ENTRY(ResultType, \

           jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \

   JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \

   DTRACE_PROBE3(hotspot_jni, CallStatic##Result##MethodA__entry, env, cls, methodID);\

   ResultType ret = 0;\

   DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \

                      (const ResultType&)ret);\

 \

   JavaValue jvalue(Tag); \

   JNI_ArgumentPusherArray ap(methodID, args); \

   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \

   ret = jvalue.get_##ResultType(); \

   return ret;\

 JNI_END

 // the runtime type of subword integral basic types is integer

 DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN)

 DEFINE_CALLSTATICMETHOD(jbyte,    Byte,    T_BYTE)

 DEFINE_CALLSTATICMETHOD(jchar,    Char,    T_CHAR)

 DEFINE_CALLSTATICMETHOD(jshort,   Short,   T_SHORT)

 DEFINE_CALLSTATICMETHOD(jobject,  Object,  T_OBJECT)

 DEFINE_CALLSTATICMETHOD(jint,     Int,     T_INT)

 DEFINE_CALLSTATICMETHOD(jlong,    Long,    T_LONG)

 DEFINE_CALLSTATICMETHOD(jfloat,   Float,   T_FLOAT)

 DEFINE_CALLSTATICMETHOD(jdouble,  Double,  T_DOUBLE)

 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod);

 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV);

 DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA);

 JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...))

   JNIWrapper("CallStaticVoidMethod");

   DTRACE_PROBE3(hotspot_jni, CallStaticVoidMethod__entry, env, cls, methodID);

   DT_VOID_RETURN_MARK(CallStaticVoidMethod);

   va_list args;

   va_start(args, methodID);

   JavaValue jvalue(T_VOID);

   JNI_ArgumentPusherVaArg ap(methodID, args);

   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);

   va_end(args);

 JNI_END

 JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args))

   JNIWrapper("CallStaticVoidMethodV");

   DTRACE_PROBE3(hotspot_jni, CallStaticVoidMethodV__entry, env, cls, methodID);

   DT_VOID_RETURN_MARK(CallStaticVoidMethodV);

   JavaValue jvalue(T_VOID);

   JNI_ArgumentPusherVaArg ap(methodID, args);

   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);

 JNI_END

 JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args))

   JNIWrapper("CallStaticVoidMethodA");

   DTRACE_PROBE3(hotspot_jni, CallStaticVoidMethodA__entry, env, cls, methodID);

   DT_VOID_RETURN_MARK(CallStaticVoidMethodA);

   JavaValue jvalue(T_VOID);

   JNI_ArgumentPusherArray ap(methodID, args);

   jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK);

 JNI_END

 //

 // Accessing Fields

 //

 DT_RETURN_MARK_DECL(GetFieldID, jfieldID);

 JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz,

           const char *name, const char *sig))

   JNIWrapper("GetFieldID");

   DTRACE_PROBE4(hotspot_jni, GetFieldID__entry, env, clazz, name, sig);

   jfieldID ret = 0;

   DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret);

   // The class should have been loaded (we have an instance of the class

   // passed in) so the field and signature should already be in the symbol

   // table.  If they're not there, the field doesn't exist.

   TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));

   TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));

   if (fieldname == NULL || signame == NULL) {

     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);

   }

   KlassHandle k(THREAD,

                 java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz)));

   // Make sure class is initialized before handing id's out to fields

   Klass::cast(k())->initialize(CHECK_NULL);

   fieldDescriptor fd;

   if (!Klass::cast(k())->oop_is_instance() ||

       !instanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) {

     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);

   }

   // A jfieldID for a non-static field is simply the offset of the field within the instanceOop

   // It may also have hash bits for k, if VerifyJNIFields is turned on.

   ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset());

   return ret;

 JNI_END

 JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID))

   JNIWrapper("GetObjectField");

   DTRACE_PROBE3(hotspot_jni, GetObjectField__entry, env, obj, fieldID);

   oop o = JNIHandles::resolve_non_null(obj);

   klassOop k = o->klass();

   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);

   // Keep JVMTI addition small and only check enabled flag here.

   // jni_GetField_probe() assumes that is okay to create handles.

   if (JvmtiExport::should_post_field_access()) {

     o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false);

   }

   jobject ret = JNIHandles::make_local(env, o->obj_field(offset));

   DTRACE_PROBE1(hotspot_jni, GetObjectField__return, ret);

   return ret;

 JNI_END

 #define DEFINE_GETFIELD(Return,Fieldname,Result) \

 \

   DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return);\

 \

 JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \

   JNIWrapper("Get" XSTR(Result) "Field"); \

 \

   DTRACE_PROBE3(hotspot_jni, Get##Result##Field__entry, env, obj, fieldID);\

   Return ret = 0;\

   DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\

 \

   oop o = JNIHandles::resolve_non_null(obj); \

   klassOop k = o->klass(); \

   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);  \

   /* Keep JVMTI addition small and only check enabled flag here.       */ \

   /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \

   /* and creates a ResetNoHandleMark.                                   */ \

   if (JvmtiExport::should_post_field_access()) { \

     o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \

   } \

   ret = o->Fieldname##_field(offset); \

   return ret; \

 JNI_END

 DEFINE_GETFIELD(jboolean, bool,   Boolean)

 DEFINE_GETFIELD(jbyte,    byte,   Byte)

 DEFINE_GETFIELD(jchar,    char,   Char)

 DEFINE_GETFIELD(jshort,   short,  Short)

 DEFINE_GETFIELD(jint,     int,    Int)

 DEFINE_GETFIELD(jlong,    long,   Long)

 DEFINE_GETFIELD(jfloat,   float,  Float)

 DEFINE_GETFIELD(jdouble,  double, Double)

 address jni_GetBooleanField_addr() {

   return (address)jni_GetBooleanField;

 }

 address jni_GetByteField_addr() {

   return (address)jni_GetByteField;

 }

 address jni_GetCharField_addr() {

   return (address)jni_GetCharField;

 }

 address jni_GetShortField_addr() {

   return (address)jni_GetShortField;

 }

 address jni_GetIntField_addr() {

   return (address)jni_GetIntField;

 }

 address jni_GetLongField_addr() {

   return (address)jni_GetLongField;

 }

 address jni_GetFloatField_addr() {

   return (address)jni_GetFloatField;

 }

 address jni_GetDoubleField_addr() {

   return (address)jni_GetDoubleField;

 }

 JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value))

   JNIWrapper("SetObjectField");

   DTRACE_PROBE4(hotspot_jni, SetObjectField__entry, env, obj, fieldID, value);

   oop o = JNIHandles::resolve_non_null(obj);

   klassOop k = o->klass();

   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);

   // Keep JVMTI addition small and only check enabled flag here.

   // jni_SetField_probe_nh() assumes that is not okay to create handles

   // and creates a ResetNoHandleMark.

   if (JvmtiExport::should_post_field_modification()) {

     jvalue field_value;

     field_value.l = value;

     o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value);

   }

   o->obj_field_put(offset, JNIHandles::resolve(value));

   DTRACE_PROBE(hotspot_jni, SetObjectField__return);

 JNI_END

 #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType) \

 \

 JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \

   JNIWrapper("Set" XSTR(Result) "Field"); \

 \

   HS_DTRACE_PROBE_CDECL_N(hotspot_jni, Set##Result##Field__entry, \

     ( JNIEnv*, jobject, jfieldID FP_SELECT_##Result(COMMA Argument,/*empty*/) ) ); \

   HS_DTRACE_PROBE_N(hotspot_jni, Set##Result##Field__entry, \

     ( env, obj, fieldID FP_SELECT_##Result(COMMA value,/*empty*/) ) ); \

 \

   oop o = JNIHandles::resolve_non_null(obj); \

   klassOop k = o->klass(); \

   int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);  \

   /* Keep JVMTI addition small and only check enabled flag here.       */ \

   /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \

   /* and creates a ResetNoHandleMark.                                   */ \

   if (JvmtiExport::should_post_field_modification()) { \

     jvalue field_value; \

     field_value.unionType = value; \

     o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \

   } \

   o->Fieldname##_field_put(offset, value); \

   DTRACE_PROBE(hotspot_jni, Set##Result##Field__return);\

 JNI_END

 DEFINE_SETFIELD(jboolean, bool,   Boolean, 'Z', z)

 DEFINE_SETFIELD(jbyte,    byte,   Byte,    'B', b)

 DEFINE_SETFIELD(jchar,    char,   Char,    'C', c)

 DEFINE_SETFIELD(jshort,   short,  Short,   'S', s)

 DEFINE_SETFIELD(jint,     int,    Int,     'I', i)

 DEFINE_SETFIELD(jlong,    long,   Long,    'J', j)

 DEFINE_SETFIELD(jfloat,   float,  Float,   'F', f)

 DEFINE_SETFIELD(jdouble,  double, Double,  'D', d)

 DT_RETURN_MARK_DECL(ToReflectedField, jobject);

 JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic))

   JNIWrapper("ToReflectedField");

   DTRACE_PROBE4(hotspot_jni, ToReflectedField__entry,

                 env, cls, fieldID, isStatic);

   jobject ret = NULL;

   DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret);

   fieldDescriptor fd;

   bool found = false;

   klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));

   assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID");

   if (isStatic) {

     // Static field. The fieldID a JNIid specifying the field holder and the offset within the klassOop.

     JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);

     assert(id->is_static_field_id(), "invalid static field id");

     found = instanceKlass::cast(id->holder())->find_local_field_from_offset(id->offset(), true, &fd);

   } else {

     // Non-static field. The fieldID is really the offset of the field within the instanceOop.

     int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID);

     found = instanceKlass::cast(k)->find_field_from_offset(offset, false, &fd);

   }

   assert(found, "bad fieldID passed into jni_ToReflectedField");

   oop reflected = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);

   ret = JNIHandles::make_local(env, reflected);

   return ret;

 JNI_END

 //

 // Accessing Static Fields

 //

 DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID);

 JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz,

           const char *name, const char *sig))

   JNIWrapper("GetStaticFieldID");

   DTRACE_PROBE4(hotspot_jni, GetStaticFieldID__entry, env, clazz, name, sig);

   jfieldID ret = NULL;

   DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret);

   // The class should have been loaded (we have an instance of the class

   // passed in) so the field and signature should already be in the symbol

   // table.  If they're not there, the field doesn't exist.

   TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name));

   TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig));

   if (fieldname == NULL || signame == NULL) {

     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);

   }

   KlassHandle k(THREAD,

                 java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz)));

   // Make sure class is initialized before handing id's out to static fields

   Klass::cast(k())->initialize(CHECK_NULL);

   fieldDescriptor fd;

   if (!Klass::cast(k())->oop_is_instance() ||

       !instanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) {

     THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name);

   }

   // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the klassOop

   JNIid* id = instanceKlass::cast(fd.field_holder())->jni_id_for(fd.offset());

   debug_only(id->set_is_static_field_id();)

   debug_only(int first_offset = instanceKlass::cast(fd.field_holder())->offset_of_static_fields();)

   debug_only(int end_offset = first_offset + (instanceKlass::cast(fd.field_holder())->static_field_size() * wordSize);)

   assert(id->offset() >= first_offset && id->offset() < end_offset, "invalid static field offset");

   ret = jfieldIDWorkaround::to_static_jfieldID(id);

   return ret;

 JNI_END

 JNI_ENTRY(jobject, jni_GetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID))

   JNIWrapper("GetStaticObjectField");

   DTRACE_PROBE3(hotspot_jni, GetStaticObjectField__entry, env, clazz, fieldID);

 #ifndef JNICHECK_KERNEL

   DEBUG_ONLY(klassOop param_k = jniCheck::validate_class(thread, clazz);)

 #endif // JNICHECK_KERNEL

   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);

   assert(id->is_static_field_id(), "invalid static field id");

   // Keep JVMTI addition small and only check enabled flag here.

   // jni_GetField_probe() assumes that is okay to create handles.

   if (JvmtiExport::should_post_field_access()) {

     JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true);

   }

   jobject ret = JNIHandles::make_local(id->holder()->obj_field(id->offset()));

   DTRACE_PROBE1(hotspot_jni, GetStaticObjectField__return, ret);

   return ret;

 JNI_END

 #define DEFINE_GETSTATICFIELD(Return,Fieldname,Result) \

 \

   DT_RETURN_MARK_DECL_FOR(Result, GetStatic##Result##Field, Return);\

 \

 JNI_ENTRY(Return, jni_GetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID)) \

   JNIWrapper("GetStatic" XSTR(Result) "Field"); \

   DTRACE_PROBE3(hotspot_jni, GetStatic##Result##Field__entry, env, clazz, fieldID);\

   Return ret = 0;\

   DT_RETURN_MARK_FOR(Result, GetStatic##Result##Field, Return, \

                      (const Return&)ret);\

   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \

   assert(id->is_static_field_id(), "invalid static field id"); \

   /* Keep JVMTI addition small and only check enabled flag here. */ \

   /* jni_GetField_probe() assumes that is okay to create handles. */ \

   if (JvmtiExport::should_post_field_access()) { \

     JvmtiExport::jni_GetField_probe(thread, NULL, NULL, id->holder(), fieldID, true); \

   } \

   ret = id->holder()-> Fieldname##_field (id->offset()); \

   return ret;\

 JNI_END

 DEFINE_GETSTATICFIELD(jboolean, bool,   Boolean)

 DEFINE_GETSTATICFIELD(jbyte,    byte,   Byte)

 DEFINE_GETSTATICFIELD(jchar,    char,   Char)

 DEFINE_GETSTATICFIELD(jshort,   short,  Short)

 DEFINE_GETSTATICFIELD(jint,     int,    Int)

 DEFINE_GETSTATICFIELD(jlong,    long,   Long)

 DEFINE_GETSTATICFIELD(jfloat,   float,  Float)

 DEFINE_GETSTATICFIELD(jdouble,  double, Double)

 JNI_ENTRY(void, jni_SetStaticObjectField(JNIEnv *env, jclass clazz, jfieldID fieldID, jobject value))

   JNIWrapper("SetStaticObjectField");

   DTRACE_PROBE4(hotspot_jni, SetStaticObjectField__entry, env, clazz, fieldID, value);

   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID);

   assert(id->is_static_field_id(), "invalid static field id");

   // Keep JVMTI addition small and only check enabled flag here.

   // jni_SetField_probe() assumes that is okay to create handles.

   if (JvmtiExport::should_post_field_modification()) {

     jvalue field_value;

     field_value.l = value;

     JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, 'L', (jvalue *)&field_value);

   }

   id->holder()->obj_field_put(id->offset(), JNIHandles::resolve(value));

   DTRACE_PROBE(hotspot_jni, SetStaticObjectField__return);

 JNI_END

 #define DEFINE_SETSTATICFIELD(Argument,Fieldname,Result,SigType,unionType) \

 \

 JNI_ENTRY(void, jni_SetStatic##Result##Field(JNIEnv *env, jclass clazz, jfieldID fieldID, Argument value)) \

   JNIWrapper("SetStatic" XSTR(Result) "Field"); \

   HS_DTRACE_PROBE_CDECL_N(hotspot_jni, SetStatic##Result##Field__entry,\

     ( JNIEnv*, jclass, jfieldID FP_SELECT_##Result(COMMA Argument,/*empty*/) ) ); \

   HS_DTRACE_PROBE_N(hotspot_jni, SetStatic##Result##Field__entry, \

     ( env, clazz, fieldID FP_SELECT_##Result(COMMA value,/*empty*/) ) ); \

 \

   JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); \

   assert(id->is_static_field_id(), "invalid static field id"); \

   /* Keep JVMTI addition small and only check enabled flag here. */ \

   /* jni_SetField_probe() assumes that is okay to create handles. */ \

   if (JvmtiExport::should_post_field_modification()) { \

     jvalue field_value; \

     field_value.unionType = value; \

     JvmtiExport::jni_SetField_probe(thread, NULL, NULL, id->holder(), fieldID, true, SigType, (jvalue *)&field_value); \

   } \

   id->holder()-> Fieldname##_field_put (id->offset(), value); \

   DTRACE_PROBE(hotspot_jni, SetStatic##Result##Field__return);\

 JNI_END

 DEFINE_SETSTATICFIELD(jboolean, bool,   Boolean, 'Z', z)

 DEFINE_SETSTATICFIELD(jbyte,    byte,   Byte,    'B', b)

 DEFINE_SETSTATICFIELD(jchar,    char,   Char,    'C', c)

 DEFINE_SETSTATICFIELD(jshort,   short,  Short,   'S', s)

 DEFINE_SETSTATICFIELD(jint,     int,    Int,     'I', i)

 DEFINE_SETSTATICFIELD(jlong,    long,   Long,    'J', j)

 DEFINE_SETSTATICFIELD(jfloat,   float,  Float,   'F', f)

 DEFINE_SETSTATICFIELD(jdouble,  double, Double,  'D', d)

 //

 // String Operations

 //

 // Unicode Interface

 DT_RETURN_MARK_DECL(NewString, jstring);

 JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len))

   JNIWrapper("NewString");

   DTRACE_PROBE3(hotspot_jni, NewString__entry, env, unicodeChars, len);

   jstring ret = NULL;

   DT_RETURN_MARK(NewString, jstring, (const jstring&)ret);

   oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL);

   ret = (jstring) JNIHandles::make_local(env, string);

   return ret;

 JNI_END

 JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string))

   JNIWrapper("GetStringLength");

   DTRACE_PROBE2(hotspot_jni, GetStringLength__entry, env, string);

   jsize ret = java_lang_String::length(JNIHandles::resolve_non_null(string));

   DTRACE_PROBE1(hotspot_jni, GetStringLength__return, ret);

   return ret;

 JNI_END

 JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars(

   JNIEnv *env, jstring string, jboolean *isCopy))

   JNIWrapper("GetStringChars");

   DTRACE_PROBE3(hotspot_jni, GetStringChars__entry, env, string, isCopy);

   //%note jni_5

   if (isCopy != NULL) {

     *isCopy = JNI_TRUE;

   }

   oop s = JNIHandles::resolve_non_null(string);

   int s_len = java_lang_String::length(s);

   typeArrayOop s_value = java_lang_String::value(s);

   int s_offset = java_lang_String::offset(s);

   jchar* buf = NEW_C_HEAP_ARRAY(jchar, s_len + 1);  // add one for zero termination

   if (s_len > 0) {

     memcpy(buf, s_value->char_at_addr(s_offset), sizeof(jchar)*s_len);

   }

   buf[s_len] = 0;

   DTRACE_PROBE1(hotspot_jni, GetStringChars__return, buf);

   return buf;

 JNI_END

 JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars))

   JNIWrapper("ReleaseStringChars");

   DTRACE_PROBE3(hotspot_jni, ReleaseStringChars__entry, env, str, chars);

   //%note jni_6

   if (chars != NULL) {

     // Since String objects are supposed to be immutable, don't copy any

     // new data back.  A bad user will have to go after the char array.

     FreeHeap((void*) chars);

   }

   DTRACE_PROBE(hotspot_jni, ReleaseStringChars__return);

 JNI_END

 // UTF Interface

 DT_RETURN_MARK_DECL(NewStringUTF, jstring);

 JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes))

   JNIWrapper("NewStringUTF");

   DTRACE_PROBE2(hotspot_jni, NewStringUTF__entry, env, bytes);

   jstring ret;

   DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret);

   oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL);

   ret = (jstring) JNIHandles::make_local(env, result);

   return ret;

 JNI_END

 JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string))

   JNIWrapper("GetStringUTFLength");

   DTRACE_PROBE2(hotspot_jni, GetStringUTFLength__entry, env, string);

   jsize ret = java_lang_String::utf8_length(JNIHandles::resolve_non_null(string));

   DTRACE_PROBE1(hotspot_jni, GetStringUTFLength__return, ret);

   return ret;

 JNI_END

 JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy))

   JNIWrapper("GetStringUTFChars");

   DTRACE_PROBE3(hotspot_jni, GetStringUTFChars__entry, env, string, isCopy);

   oop java_string = JNIHandles::resolve_non_null(string);

   size_t length = java_lang_String::utf8_length(java_string);

   char* result = AllocateHeap(length + 1, "GetStringUTFChars");

   java_lang_String::as_utf8_string(java_string, result, (int) length + 1);

   if (isCopy != NULL) *isCopy = JNI_TRUE;

   DTRACE_PROBE1(hotspot_jni, GetStringUTFChars__return, result);

   return result;

 JNI_END

 JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars))

   JNIWrapper("ReleaseStringUTFChars");

   DTRACE_PROBE3(hotspot_jni, ReleaseStringUTFChars__entry, env, str, chars);

   if (chars != NULL) {

     FreeHeap((char*) chars);

   }

   DTRACE_PROBE(hotspot_jni, ReleaseStringUTFChars__return);

 JNI_END

 JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array))

   JNIWrapper("GetArrayLength");

   DTRACE_PROBE2(hotspot_jni, GetArrayLength__entry, env, array);

   arrayOop a = arrayOop(JNIHandles::resolve_non_null(array));

   assert(a->is_array(), "must be array");

   jsize ret = a->length();

   DTRACE_PROBE1(hotspot_jni, GetArrayLength__return, ret);

   return ret;

 JNI_END

 //

 // Object Array Operations

 //

 DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray);

 JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement))

   JNIWrapper("NewObjectArray");

   DTRACE_PROBE4(hotspot_jni, NewObjectArray__entry, env, length, elementClass, initialElement);

   jobjectArray ret = NULL;

   DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret);

   KlassHandle ek(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(elementClass)));

   klassOop ako = Klass::cast(ek())->array_klass(CHECK_NULL);

   KlassHandle ak = KlassHandle(THREAD, ako);

   objArrayKlass::cast(ak())->initialize(CHECK_NULL);

   objArrayOop result = objArrayKlass::cast(ak())->allocate(length, CHECK_NULL);

   oop initial_value = JNIHandles::resolve(initialElement);

   if (initial_value != NULL) {  // array already initialized with NULL

     for (int index = 0; index < length; index++) {

       result->obj_at_put(index, initial_value);

     }

   }

   ret = (jobjectArray) JNIHandles::make_local(env, result);

   return ret;

 JNI_END

 DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject);

 JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index))

   JNIWrapper("GetObjectArrayElement");

   DTRACE_PROBE3(hotspot_jni, GetObjectArrayElement__entry, env, array, index);

   jobject ret = NULL;

   DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret);

   objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));

   if (a->is_within_bounds(index)) {

     ret = JNIHandles::make_local(env, a->obj_at(index));

     return ret;

   } else {

     char buf[jintAsStringSize];

     sprintf(buf, "%d", index);

     THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);

   }

 JNI_END

 DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement);

 JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value))

   JNIWrapper("SetObjectArrayElement");

   DTRACE_PROBE4(hotspot_jni, SetObjectArrayElement__entry, env, array, index, value);

   DT_VOID_RETURN_MARK(SetObjectArrayElement);

   objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array));

   oop v = JNIHandles::resolve(value);

   if (a->is_within_bounds(index)) {

     if (v == NULL || v->is_a(objArrayKlass::cast(a->klass())->element_klass())) {

       a->obj_at_put(index, v);

     } else {

       THROW(vmSymbols::java_lang_ArrayStoreException());

     }

   } else {

     char buf[jintAsStringSize];

     sprintf(buf, "%d", index);

     THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf);

   }

 JNI_END

 #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result) \

 \

   DT_RETURN_MARK_DECL(New##Result##Array, Return);\

 \

 JNI_ENTRY(Return, \

           jni_New##Result##Array(JNIEnv *env, jsize len)) \

   JNIWrapper("New" XSTR(Result) "Array"); \

   DTRACE_PROBE2(hotspot_jni, New##Result##Array__entry, env, len);\

   Return ret = NULL;\

   DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\

 \

   oop obj= oopFactory::Allocator(len, CHECK_0); \

   ret = (Return) JNIHandles::make_local(env, obj); \

   return ret;\

 JNI_END

 DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray,   Boolean)

 DEFINE_NEWSCALARARRAY(jbyteArray,    new_byteArray,   Byte)

 DEFINE_NEWSCALARARRAY(jshortArray,   new_shortArray,  Short)

 DEFINE_NEWSCALARARRAY(jcharArray,    new_charArray,   Char)

 DEFINE_NEWSCALARARRAY(jintArray,     new_intArray,    Int)

 DEFINE_NEWSCALARARRAY(jlongArray,    new_longArray,   Long)

 DEFINE_NEWSCALARARRAY(jfloatArray,   new_singleArray, Float)

 DEFINE_NEWSCALARARRAY(jdoubleArray,  new_doubleArray, Double)

 // Return an address which will fault if the caller writes to it.

 static char* get_bad_address() {

   static char* bad_address = NULL;

   if (bad_address == NULL) {

     size_t size = os::vm_allocation_granularity();

     bad_address = os::reserve_memory(size);

     if (bad_address != NULL) {

       os::protect_memory(bad_address, size, os::MEM_PROT_READ,

                          /*is_committed*/false);

     }

   }

   return bad_address;

 }

 #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag) \

 \

 JNI_QUICK_ENTRY(ElementType*, \

           jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \

   JNIWrapper("Get" XSTR(Result) "ArrayElements"); \

   DTRACE_PROBE3(hotspot_jni, Get##Result##ArrayElements__entry, env, array, isCopy);\

   /* allocate an chunk of memory in c land */ \

   typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \

   ElementType* result; \

   int len = a->length(); \

   if (len == 0) { \

     /* Empty array: legal but useless, can't return NULL. \

      * Return a pointer to something useless. \

      * Avoid asserts in typeArrayOop. */ \

     result = (ElementType*)get_bad_address(); \

   } else { \

     result = NEW_C_HEAP_ARRAY(ElementType, len); \

     /* copy the array to the c chunk */ \

     memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \

   } \

   if (isCopy) *isCopy = JNI_TRUE; \

   DTRACE_PROBE1(hotspot_jni, Get##Result##ArrayElements__return, result);\

   return result; \

 JNI_END

 DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool)

 DEFINE_GETSCALARARRAYELEMENTS(T_BYTE,    jbyte,    Byte,    byte)

 DEFINE_GETSCALARARRAYELEMENTS(T_SHORT,   jshort,   Short,   short)

 DEFINE_GETSCALARARRAYELEMENTS(T_CHAR,    jchar,    Char,    char)

 DEFINE_GETSCALARARRAYELEMENTS(T_INT,     jint,     Int,     int)

 DEFINE_GETSCALARARRAYELEMENTS(T_LONG,    jlong,    Long,    long)

 DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT,   jfloat,   Float,   float)

 DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE,  jdouble,  Double,  double)

 #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag) \

 \

 JNI_QUICK_ENTRY(void, \

           jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \

                                              ElementType *buf, jint mode)) \

   JNIWrapper("Release" XSTR(Result) "ArrayElements"); \

   DTRACE_PROBE4(hotspot_jni, Release##Result##ArrayElements__entry, env, array, buf, mode);\

   typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \

   int len = a->length(); \

   if (len != 0) {   /* Empty array:  nothing to free or copy. */  \

     if ((mode == 0) || (mode == JNI_COMMIT)) { \

       memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \

     } \

     if ((mode == 0) || (mode == JNI_ABORT)) { \

       FreeHeap(buf); \

     } \

   } \

   DTRACE_PROBE(hotspot_jni, Release##Result##ArrayElements__return);\

 JNI_END

 DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool)

 DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE,    jbyte,    Byte,    byte)

 DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT,   jshort,   Short,   short)

 DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR,    jchar,    Char,    char)

 DEFINE_RELEASESCALARARRAYELEMENTS(T_INT,     jint,     Int,     int)

 DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG,    jlong,    Long,    long)

 DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT,   jfloat,   Float,   float)

 DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE,  jdouble,  Double,  double)

 #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag) \

   DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion);\

 \

 JNI_ENTRY(void, \

 jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \

              jsize len, ElementType *buf)) \

   JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \

   DTRACE_PROBE5(hotspot_jni, Get##Result##ArrayRegion__entry, env, array, start, len, buf);\

   DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \

   typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \

   if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \

     THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \

   } else { \

     if (len > 0) { \

       int sc = typeArrayKlass::cast(src->klass())->log2_element_size(); \

       memcpy((u_char*) buf, \

              (u_char*) src->Tag##_at_addr(start), \

              len << sc);                          \

     } \

   } \

 JNI_END

 DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool)

 DEFINE_GETSCALARARRAYREGION(T_BYTE,    jbyte,   Byte,    byte)

 DEFINE_GETSCALARARRAYREGION(T_SHORT,   jshort,  Short,   short)

 DEFINE_GETSCALARARRAYREGION(T_CHAR,    jchar,   Char,    char)

 DEFINE_GETSCALARARRAYREGION(T_INT,     jint,    Int,     int)

 DEFINE_GETSCALARARRAYREGION(T_LONG,    jlong,   Long,    long)

 DEFINE_GETSCALARARRAYREGION(T_FLOAT,   jfloat,  Float,   float)

 DEFINE_GETSCALARARRAYREGION(T_DOUBLE,  jdouble, Double,  double)

 #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag) \

   DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion);\

 \

 JNI_ENTRY(void, \

 jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \

              jsize len, const ElementType *buf)) \

   JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \

   DTRACE_PROBE5(hotspot_jni, Set##Result##ArrayRegion__entry, env, array, start, len, buf);\

   DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \

   typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \

   if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \

     THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \

   } else { \

     if (len > 0) { \

       int sc = typeArrayKlass::cast(dst->klass())->log2_element_size(); \

       memcpy((u_char*) dst->Tag##_at_addr(start), \

              (u_char*) buf, \

              len << sc);    \

     } \

   } \

 JNI_END

 DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool)

 DEFINE_SETSCALARARRAYREGION(T_BYTE,    jbyte,    Byte,    byte)

 DEFINE_SETSCALARARRAYREGION(T_SHORT,   jshort,   Short,   short)

 DEFINE_SETSCALARARRAYREGION(T_CHAR,    jchar,    Char,    char)

 DEFINE_SETSCALARARRAYREGION(T_INT,     jint,     Int,     int)

 DEFINE_SETSCALARARRAYREGION(T_LONG,    jlong,    Long,    long)

 DEFINE_SETSCALARARRAYREGION(T_FLOAT,   jfloat,   Float,   float)

 DEFINE_SETSCALARARRAYREGION(T_DOUBLE,  jdouble,  Double,  double)

 //

 // Interception of natives

 //

 // The RegisterNatives call being attempted tried to register with a method that

 // is not native.  Ask JVM TI what prefixes have been specified.  Then check

 // to see if the native method is now wrapped with the prefixes.  See the

 // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details.

 static methodOop find_prefixed_native(KlassHandle k,

                                       Symbol* name, Symbol* signature, TRAPS) {

   ResourceMark rm(THREAD);

   methodOop method;

   int name_len = name->utf8_length();

   char* name_str = name->as_utf8();

   int prefix_count;

   char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);

   for (int i = 0; i < prefix_count; i++) {

     char* prefix = prefixes[i];

     int prefix_len = (int)strlen(prefix);

     // try adding this prefix to the method name and see if it matches another method name

     int trial_len = name_len + prefix_len;

     char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1);

     strcpy(trial_name_str, prefix);

     strcat(trial_name_str, name_str);

     TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len);

     if (trial_name == NULL) {

       continue; // no such symbol, so this prefix wasn't used, try the next prefix

     }

     method = Klass::cast(k())->lookup_method(trial_name, signature);

     if (method == NULL) {

       continue; // signature doesn't match, try the next prefix

     }

     if (method->is_native()) {

       method->set_is_prefixed_native();

       return method; // wahoo, we found a prefixed version of the method, return it

     }

     // found as non-native, so prefix is good, add it, probably just need more prefixes

     name_len = trial_len;

     name_str = trial_name_str;

   }

   return NULL; // not found

 }

 static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) {

   methodOop method = Klass::cast(k())->lookup_method(name, signature);

   if (method == NULL) {

     ResourceMark rm;

     stringStream st;

     st.print("Method %s name or signature does not match",

              methodOopDesc::name_and_sig_as_C_string(Klass::cast(k()), name, signature));

     THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);

   }

   if (!method->is_native()) {

     // trying to register to a non-native method, see if a JVM TI agent has added prefix(es)

     method = find_prefixed_native(k, name, signature, THREAD);

     if (method == NULL) {

       ResourceMark rm;

       stringStream st;

       st.print("Method %s is not declared as native",

                methodOopDesc::name_and_sig_as_C_string(Klass::cast(k()), name, signature));

       THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false);

     }

   }

   if (entry != NULL) {

     method->set_native_function(entry,

       methodOopDesc::native_bind_event_is_interesting);

   } else {

     method->clear_native_function();

   }

   if (PrintJNIResolving) {

     ResourceMark rm(THREAD);

     tty->print_cr("[Registering JNI native method %s.%s]",

       Klass::cast(method->method_holder())->external_name(),

       method->name()->as_C_string());

   }

   return true;

 }

 DT_RETURN_MARK_DECL(RegisterNatives, jint);

 JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz,

                                     const JNINativeMethod *methods,

                                     jint nMethods))

   JNIWrapper("RegisterNatives");

   DTRACE_PROBE4(hotspot_jni, RegisterNatives__entry, env, clazz, methods, nMethods);

   jint ret = 0;

   DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret);

   KlassHandle h_k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz)));

   for (int index = 0; index < nMethods; index++) {

     const char* meth_name = methods[index].name;

     const char* meth_sig = methods[index].signature;

     int meth_name_len = (int)strlen(meth_name);

     // The class should have been loaded (we have an instance of the class

     // passed in) so the method and signature should already be in the symbol

     // table.  If they're not there, the method doesn't exist.

     TempNewSymbol  name = SymbolTable::probe(meth_name, meth_name_len);

     TempNewSymbol  signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig));

     if (name == NULL || signature == NULL) {

       ResourceMark rm;

       stringStream st;

       st.print("Method %s.%s%s not found", Klass::cast(h_k())->external_name(), meth_name, meth_sig);

       // Must return negative value on failure

       THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1);

     }

     bool res = register_native(h_k, name, signature,

                                (address) methods[index].fnPtr, THREAD);

     if (!res) {

       ret = -1;

       break;

     }

   }

   return ret;

 JNI_END

 JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz))

   JNIWrapper("UnregisterNatives");

   DTRACE_PROBE2(hotspot_jni, UnregisterNatives__entry, env, clazz);

   klassOop k   = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz));

   //%note jni_2

   if (Klass::cast(k)->oop_is_instance()) {

     for (int index = 0; index < instanceKlass::cast(k)->methods()->length(); index++) {

       methodOop m = methodOop(instanceKlass::cast(k)->methods()->obj_at(index));

       if (m->is_native()) {

         m->clear_native_function();

         m->set_signature_handler(NULL);

       }

     }

   }

   DTRACE_PROBE1(hotspot_jni, UnregisterNatives__return, 0);

   return 0;

 JNI_END

 //

 // Monitor functions

 //

 DT_RETURN_MARK_DECL(MonitorEnter, jint);

 JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj))

   DTRACE_PROBE2(hotspot_jni, MonitorEnter__entry, env, jobj);

   jint ret = JNI_ERR;

   DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret);

   // If the object is null, we can't do anything with it

   if (jobj == NULL) {

     THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);

   }

   Handle obj(thread, JNIHandles::resolve_non_null(jobj));

   ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR));

   ret = JNI_OK;

   return ret;

 JNI_END

 DT_RETURN_MARK_DECL(MonitorExit, jint);

 JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj))

   DTRACE_PROBE2(hotspot_jni, MonitorExit__entry, env, jobj);

   jint ret = JNI_ERR;

   DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret);

   // Don't do anything with a null object

   if (jobj == NULL) {

     THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR);

   }

   Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));

   ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR));

   ret = JNI_OK;

   return ret;

 JNI_END

 //

 // Extensions

 //

 DT_VOID_RETURN_MARK_DECL(GetStringRegion);

 JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf))

   JNIWrapper("GetStringRegion");

   DTRACE_PROBE5(hotspot_jni, GetStringRegion__entry, env, string, start, len, buf);

   DT_VOID_RETURN_MARK(GetStringRegion);

   oop s = JNIHandles::resolve_non_null(string);

   int s_len = java_lang_String::length(s);

   if (start < 0 || len < 0 || start + len > s_len) {

     THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());

   } else {

     if (len > 0) {

       int s_offset = java_lang_String::offset(s);

       typeArrayOop s_value = java_lang_String::value(s);

       memcpy(buf, s_value->char_at_addr(s_offset+start), sizeof(jchar)*len);

     }

   }

 JNI_END

 DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion);

 JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf))

   JNIWrapper("GetStringUTFRegion");

   DTRACE_PROBE5(hotspot_jni, GetStringUTFRegion__entry, env, string, start, len, buf);

   DT_VOID_RETURN_MARK(GetStringUTFRegion);

   oop s = JNIHandles::resolve_non_null(string);

   int s_len = java_lang_String::length(s);

   if (start < 0 || len < 0 || start + len > s_len) {

     THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException());

   } else {

     //%note jni_7

     if (len > 0) {

       ResourceMark rm(THREAD);

       char *utf_region = java_lang_String::as_utf8_string(s, start, len);

       int utf_len = (int)strlen(utf_region);

       memcpy(buf, utf_region, utf_len);

       buf[utf_len] = 0;

     } else {

       // JDK null-terminates the buffer even in len is zero

       if (buf != NULL) {

         buf[0] = 0;

       }

     }

   }

 JNI_END

 JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy))

   JNIWrapper("GetPrimitiveArrayCritical");

   DTRACE_PROBE3(hotspot_jni, GetPrimitiveArrayCritical__entry, env, array, isCopy);

   GC_locker::lock_critical(thread);

   if (isCopy != NULL) {

     *isCopy = JNI_FALSE;

   }

   oop a = JNIHandles::resolve_non_null(array);

   assert(a->is_array(), "just checking");

   BasicType type;

   if (a->is_objArray()) {

     type = T_OBJECT;

   } else {

     type = typeArrayKlass::cast(a->klass())->element_type();

   }

   void* ret = arrayOop(a)->base(type);

   DTRACE_PROBE1(hotspot_jni, GetPrimitiveArrayCritical__return, ret);

   return ret;

 JNI_END

 JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode))

   JNIWrapper("ReleasePrimitiveArrayCritical");

   DTRACE_PROBE4(hotspot_jni, ReleasePrimitiveArrayCritical__entry, env, array, carray, mode);

   // The array, carray and mode arguments are ignored

   GC_locker::unlock_critical(thread);

   DTRACE_PROBE(hotspot_jni, ReleasePrimitiveArrayCritical__return);

 JNI_END

 JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy))

   JNIWrapper("GetStringCritical");

   DTRACE_PROBE3(hotspot_jni, GetStringCritical__entry, env, string, isCopy);

   GC_locker::lock_critical(thread);

   if (isCopy != NULL) {

     *isCopy = JNI_FALSE;

   }

   oop s = JNIHandles::resolve_non_null(string);

   int s_len = java_lang_String::length(s);