jdk8-mips64-public/hotspot: comparison src/share/vm/prims/jni.cpp

--1:000000000000
+:a61af66fc99e
+/*
+* Copyright 1997-2007 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+* CA 95054 USA or visit www.sun.com if you need additional information or
+* have any questions.
+*
+*/
+# include "incls/_precompiled.incl"
+# include "incls/_jni.cpp.incl"
+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();
+while (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.
+symbolHandle class_name;
+if (name != NULL) {
+const int str_len = (int)strlen(name);
+if (str_len > symbolOopDesc::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);
+}
+class_name = oopFactory::new_symbol_handle(name, str_len, CHECK_NULL);
+}
+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, CHECK_NULL);
+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) > symbolOopDesc::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,
+vmSymbolHandles::getFromClass_name(),
+vmSymbolHandles::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());
+}
+symbolHandle sym = oopFactory::new_symbol_handle(name, CHECK_NULL);
+result = find_class_from_class_loader(env, sym, true, loader,
+protection_domain, true, thread);
+// 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)));
+symbolHandle name = symbolHandle(THREAD, 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()),
+vmSymbolHandles::printStackTrace_name(),
+vmSymbolHandles::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(false); // Prevent core dump, causes a jck failure.
+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(Thread *thread, symbolOop signature)
+: SignatureIterator(thread, 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(Thread *thread, symbolOop signature, va_list rap)
+: JNI_ArgumentPusher(thread, signature) {
+set_ap(rap);
+}
+JNI_ArgumentPusherVaArg(Thread *thread, jmethodID method_id, va_list rap)
+: JNI_ArgumentPusher(thread, 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(Thread *thread, symbolOop signature, const jvalue *rap)
+: JNI_ArgumentPusher(thread, signature) {
+set_ap(rap);
+}
+JNI_ArgumentPusherArray(Thread *thread, jmethodID method_id, const jvalue *rap)
+: JNI_ArgumentPusher(thread, 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());
+symbolHandle name (THREAD, method->name());
+symbolHandle signature (THREAD, 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());
+symbolHandle name (THREAD, method->name());
+symbolHandle signature (THREAD, 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(THREAD, 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(THREAD, 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(THREAD, 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(THREAD, 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(THREAD, 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.
+symbolHandle signature =
+symbolHandle(THREAD, SymbolTable::probe(sig, (int)strlen(sig)));
+symbolHandle name;
+if (name_str == NULL) {
+name = vmSymbolHandles::object_initializer_name();
+} else {
+name = symbolHandle(THREAD,
+SymbolTable::probe(name_str, (int)strlen(name_str)));
+}
+if (name.is_null() || signature.is_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(THREAD, 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(THREAD, 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(THREAD, 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(THREAD, 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(THREAD, 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(THREAD, 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(THREAD, 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(THREAD, 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(THREAD, 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(THREAD, 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(THREAD, 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(THREAD, 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(THREAD, 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(THREAD, 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(THREAD, 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(THREAD, 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(THREAD, 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(THREAD, 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.
+symbolHandle fieldname =
+symbolHandle(THREAD, SymbolTable::probe(name, (int)strlen(name)));
+symbolHandle signame   =
+symbolHandle(THREAD, SymbolTable::probe(sig, (int)strlen(sig)));
+if (fieldname.is_null() || signame.is_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.
+symbolHandle fieldname =
+symbolHandle(THREAD, SymbolTable::probe(name, (int)strlen(name)));
+symbolHandle signame   =
+symbolHandle(THREAD, SymbolTable::probe(sig, (int)strlen(sig)));
+if (fieldname.is_null() || signame.is_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);
+ResourceMark rm;
+char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(string));
+int length = (int)strlen(str);
+char* result = AllocateHeap(length+1, "GetStringUTFChars");
+strcpy(result, str);
+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)) {
+jobject 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_FOR(Result, 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_FOR(Result, 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::commit_memory(bad_address, size);
+os::protect_memory(bad_address, size);
+}
+}
+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,
+symbolHandle name, symbolHandle 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);
+symbolHandle trial_name(THREAD, SymbolTable::probe(trial_name_str, trial_len));
+if (trial_name.is_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, symbolHandle name, symbolHandle 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.
+symbolHandle name(THREAD, SymbolTable::probe(meth_name, meth_name_len));
+symbolHandle signature(THREAD, SymbolTable::probe(meth_sig, (int)strlen(meth_sig)));
+if (name.is_null() || signature.is_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);
+typeArrayOop s_value = java_lang_String::value(s);
+int s_offset = java_lang_String::offset(s);
+const jchar* ret;
+if (s_len > 0) {
+ret = s_value->char_at_addr(s_offset);
+} else {
+ret = (jchar*) s_value->base(T_CHAR);
+}
+DTRACE_PROBE1(hotspot_jni, GetStringCritical__return, ret);
+return ret;
+JNI_END
+JNI_ENTRY(void, jni_ReleaseStringCritical(JNIEnv *env, jstring str, const jchar *chars))
+JNIWrapper("ReleaseStringCritical");
+DTRACE_PROBE3(hotspot_jni, ReleaseStringCritical__entry, env, str, chars);
+// The str and chars arguments are ignored
+GC_locker::unlock_critical(thread);
+DTRACE_PROBE(hotspot_jni, ReleaseStringCritical__return);
+JNI_END
+JNI_ENTRY(jweak, jni_NewWeakGlobalRef(JNIEnv *env, jobject ref))
+JNIWrapper("jni_NewWeakGlobalRef");
+DTRACE_PROBE2(hotspot_jni, NewWeakGlobalRef__entry, env, ref);
+Handle ref_handle(thread, JNIHandles::resolve(ref));
+jweak ret = JNIHandles::make_weak_global(ref_handle);
+DTRACE_PROBE1(hotspot_jni, NewWeakGlobalRef__return, ret);
+return ret;
+JNI_END
+// Must be JNI_ENTRY (with HandleMark)
+JNI_ENTRY(void, jni_DeleteWeakGlobalRef(JNIEnv *env, jweak ref))
+JNIWrapper("jni_DeleteWeakGlobalRef");
+DTRACE_PROBE2(hotspot_jni, DeleteWeakGlobalRef__entry, env, ref);
+JNIHandles::destroy_weak_global(ref);
+DTRACE_PROBE(hotspot_jni, DeleteWeakGlobalRef__return);
+JNI_END
+JNI_QUICK_ENTRY(jboolean, jni_ExceptionCheck(JNIEnv *env))
+JNIWrapper("jni_ExceptionCheck");
+DTRACE_PROBE1(hotspot_jni, ExceptionCheck__entry, env);
+jni_check_async_exceptions(thread);
+jboolean ret = (thread->has_pending_exception()) ? JNI_TRUE : JNI_FALSE;
+DTRACE_PROBE1(hotspot_jni, ExceptionCheck__return, ret);
+return ret;
+JNI_END
+// Initialization state for three routines below relating to
+// java.nio.DirectBuffers
+static          jint directBufferSupportInitializeStarted = 0;
+static volatile jint directBufferSupportInitializeEnded   = 0;
+static volatile jint directBufferSupportInitializeFailed  = 0;
+static jclass    bufferClass                 = NULL;
+static jclass    directBufferClass           = NULL;
+static jclass    directByteBufferClass       = NULL;
+static jmethodID directByteBufferConstructor = NULL;
+static jfieldID  directBufferAddressField    = NULL;
+static jfieldID  bufferCapacityField         = NULL;
+static jclass lookupOne(JNIEnv* env, const char* name, TRAPS) {
+Handle loader;            // null (bootstrap) loader
+Handle protection_domain; // null protection domain
+symbolHandle sym = oopFactory::new_symbol_handle(name, CHECK_NULL);
+return find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL);
+}
+// These lookups are done with the NULL (bootstrap) ClassLoader to
+// circumvent any security checks that would be done by jni_FindClass.
+JNI_ENTRY(bool, lookupDirectBufferClasses(JNIEnv* env))
+{
+if ((bufferClass           = lookupOne(env, "java/nio/Buffer", thread))           == NULL) { return false; }
+if ((directBufferClass     = lookupOne(env, "sun/nio/ch/DirectBuffer", thread))   == NULL) { return false; }
+if ((directByteBufferClass = lookupOne(env, "java/nio/DirectByteBuffer", thread)) == NULL) { return false; }
+return true;
+}
+JNI_END
+static bool initializeDirectBufferSupport(JNIEnv* env, JavaThread* thread) {
+if (directBufferSupportInitializeFailed) {
+return false;
+}
+if (Atomic::cmpxchg(1, &directBufferSupportInitializeStarted, 0) == 0) {
+if (!lookupDirectBufferClasses(env)) {
+directBufferSupportInitializeFailed = 1;
+return false;
+}
+// Make global references for these
+bufferClass           = (jclass) env->NewGlobalRef(bufferClass);
+directBufferClass     = (jclass) env->NewGlobalRef(directBufferClass);
+directByteBufferClass = (jclass) env->NewGlobalRef(directByteBufferClass);
+// Get needed field and method IDs
+directByteBufferConstructor = env->GetMethodID(directByteBufferClass, "<init>", "(JI)V");
+directBufferAddressField    = env->GetFieldID(bufferClass, "address", "J");
+bufferCapacityField         = env->GetFieldID(bufferClass, "capacity", "I");
+if ((directByteBufferConstructor == NULL) ||
+(directBufferAddressField    == NULL) ||
+(bufferCapacityField         == NULL)) {
+directBufferSupportInitializeFailed = 1;
+return false;
+}
+directBufferSupportInitializeEnded = 1;
+} else {
+ThreadInVMfromNative tivn(thread); // set state as yield_all can call os:sleep
+while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) {
+os::yield_all();
+}
+}
+return !directBufferSupportInitializeFailed;
+}
+extern "C" jobject JNICALL jni_NewDirectByteBuffer(JNIEnv *env, void* address, jlong capacity)
+{
+// thread_from_jni_environment() will block if VM is gone.
+JavaThread* thread = JavaThread::thread_from_jni_environment(env);
+JNIWrapper("jni_NewDirectByteBuffer");
+DTRACE_PROBE3(hotspot_jni, NewDirectByteBuffer__entry, env, address, capacity);
+if (!directBufferSupportInitializeEnded) {
+if (!initializeDirectBufferSupport(env, thread)) {
+DTRACE_PROBE1(hotspot_jni, NewDirectByteBuffer__return, NULL);
+return NULL;
+}
+}
+// Being paranoid about accidental sign extension on address
+jlong addr = (jlong) ((uintptr_t) address);
+// NOTE that package-private DirectByteBuffer constructor currently
+// takes int capacity
+jint  cap  = (jint)  capacity;
+jobject ret = env->NewObject(directByteBufferClass, directByteBufferConstructor, addr, cap);
+DTRACE_PROBE1(hotspot_jni, NewDirectByteBuffer__return, ret);
+return ret;
+}
+DT_RETURN_MARK_DECL(GetDirectBufferAddress, void*);
+extern "C" void* JNICALL jni_GetDirectBufferAddress(JNIEnv *env, jobject buf)
+{
+// thread_from_jni_environment() will block if VM is gone.
+JavaThread* thread = JavaThread::thread_from_jni_environment(env);
+JNIWrapper("jni_GetDirectBufferAddress");
+DTRACE_PROBE2(hotspot_jni, GetDirectBufferAddress__entry, env, buf);
+void* ret = NULL;
+DT_RETURN_MARK(GetDirectBufferAddress, void*, (const void*&)ret);
+if (!directBufferSupportInitializeEnded) {
+if (!initializeDirectBufferSupport(env, thread)) {
+return 0;
+}
+}
+if ((buf != NULL) && (!env->IsInstanceOf(buf, directBufferClass))) {
+return 0;
+}
+ret = (void*)(intptr_t)env->GetLongField(buf, directBufferAddressField);
+return ret;
+}
+DT_RETURN_MARK_DECL(GetDirectBufferCapacity, jlong);
+extern "C" jlong JNICALL jni_GetDirectBufferCapacity(JNIEnv *env, jobject buf)
+{
+// thread_from_jni_environment() will block if VM is gone.
+JavaThread* thread = JavaThread::thread_from_jni_environment(env);
+JNIWrapper("jni_GetDirectBufferCapacity");
+DTRACE_PROBE2(hotspot_jni, GetDirectBufferCapacity__entry, env, buf);
+jlong ret = -1;
+DT_RETURN_MARK(GetDirectBufferCapacity, jlong, (const jlong&)ret);
+if (!directBufferSupportInitializeEnded) {
+if (!initializeDirectBufferSupport(env, thread)) {
+ret = 0;
+return ret;
+}
+}
+if (buf == NULL) {
+return -1;
+}
+if (!env->IsInstanceOf(buf, directBufferClass)) {
+return -1;
+}
+// NOTE that capacity is currently an int in the implementation
+ret = env->GetIntField(buf, bufferCapacityField);
+return ret;
+}
+JNI_LEAF(jint, jni_GetVersion(JNIEnv *env))
+JNIWrapper("GetVersion");
+DTRACE_PROBE1(hotspot_jni, GetVersion__entry, env);
+DTRACE_PROBE1(hotspot_jni, GetVersion__return, CurrentVersion);
+return CurrentVersion;
+JNI_END
+extern struct JavaVM_ main_vm;
+JNI_LEAF(jint, jni_GetJavaVM(JNIEnv *env, JavaVM **vm))
+JNIWrapper("jni_GetJavaVM");
+DTRACE_PROBE2(hotspot_jni, GetJavaVM__entry, env, vm);
+*vm  = (JavaVM *)(&main_vm);
+DTRACE_PROBE1(hotspot_jni, GetJavaVM__return, JNI_OK);
+return JNI_OK;
+JNI_END
+// Structure containing all jni functions
+struct JNINativeInterface_ jni_NativeInterface = {
+NULL,
+NULL,
+NULL,
+NULL,
+jni_GetVersion,
+jni_DefineClass,
+jni_FindClass,
+jni_FromReflectedMethod,
+jni_FromReflectedField,
+jni_ToReflectedMethod,
+jni_GetSuperclass,
+jni_IsAssignableFrom,
+jni_ToReflectedField,
+jni_Throw,
+jni_ThrowNew,
+jni_ExceptionOccurred,
+jni_ExceptionDescribe,
+jni_ExceptionClear,
+jni_FatalError,
+jni_PushLocalFrame,
+jni_PopLocalFrame,
+jni_NewGlobalRef,
+jni_DeleteGlobalRef,
+jni_DeleteLocalRef,
+jni_IsSameObject,
+jni_NewLocalRef,
+jni_EnsureLocalCapacity,
+jni_AllocObject,
+jni_NewObject,
+jni_NewObjectV,
+jni_NewObjectA,
+jni_GetObjectClass,
+jni_IsInstanceOf,
+jni_GetMethodID,
+jni_CallObjectMethod,
+jni_CallObjectMethodV,
+jni_CallObjectMethodA,
+jni_CallBooleanMethod,
+jni_CallBooleanMethodV,
+jni_CallBooleanMethodA,
+jni_CallByteMethod,
+jni_CallByteMethodV,
+jni_CallByteMethodA,
+jni_CallCharMethod,
+jni_CallCharMethodV,
+jni_CallCharMethodA,
+jni_CallShortMethod,
+jni_CallShortMethodV,
+jni_CallShortMethodA,
+jni_CallIntMethod,
+jni_CallIntMethodV,
+jni_CallIntMethodA,
+jni_CallLongMethod,
+jni_CallLongMethodV,
+jni_CallLongMethodA,
+jni_CallFloatMethod,
+jni_CallFloatMethodV,
+jni_CallFloatMethodA,
+jni_CallDoubleMethod,
+jni_CallDoubleMethodV,
+jni_CallDoubleMethodA,
+jni_CallVoidMethod,
+jni_CallVoidMethodV,
+jni_CallVoidMethodA,
+jni_CallNonvirtualObjectMethod,
+jni_CallNonvirtualObjectMethodV,
+jni_CallNonvirtualObjectMethodA,
+jni_CallNonvirtualBooleanMethod,
+jni_CallNonvirtualBooleanMethodV,
+jni_CallNonvirtualBooleanMethodA,
+jni_CallNonvirtualByteMethod,
+jni_CallNonvirtualByteMethodV,
+jni_CallNonvirtualByteMethodA,
+jni_CallNonvirtualCharMethod,
+jni_CallNonvirtualCharMethodV,
+jni_CallNonvirtualCharMethodA,
+jni_CallNonvirtualShortMethod,
+jni_CallNonvirtualShortMethodV,
+jni_CallNonvirtualShortMethodA,
+jni_CallNonvirtualIntMethod,
+jni_CallNonvirtualIntMethodV,
+jni_CallNonvirtualIntMethodA,
+jni_CallNonvirtualLongMethod,
+jni_CallNonvirtualLongMethodV,
+jni_CallNonvirtualLongMethodA,
+jni_CallNonvirtualFloatMethod,
+jni_CallNonvirtualFloatMethodV,
+jni_CallNonvirtualFloatMethodA,
+jni_CallNonvirtualDoubleMethod,
+jni_CallNonvirtualDoubleMethodV,
+jni_CallNonvirtualDoubleMethodA,
+jni_CallNonvirtualVoidMethod,
+jni_CallNonvirtualVoidMethodV,
+jni_CallNonvirtualVoidMethodA,
+jni_GetFieldID,
+jni_GetObjectField,
+jni_GetBooleanField,
+jni_GetByteField,
+jni_GetCharField,
+jni_GetShortField,
+jni_GetIntField,
+jni_GetLongField,
+jni_GetFloatField,
+jni_GetDoubleField,
+jni_SetObjectField,
+jni_SetBooleanField,
+jni_SetByteField,
+jni_SetCharField,
+jni_SetShortField,
+jni_SetIntField,
+jni_SetLongField,
+jni_SetFloatField,
+jni_SetDoubleField,
+jni_GetStaticMethodID,
+jni_CallStaticObjectMethod,
+jni_CallStaticObjectMethodV,
+jni_CallStaticObjectMethodA,
+jni_CallStaticBooleanMethod,
+jni_CallStaticBooleanMethodV,
+jni_CallStaticBooleanMethodA,
+jni_CallStaticByteMethod,
+jni_CallStaticByteMethodV,
+jni_CallStaticByteMethodA,
+jni_CallStaticCharMethod,
+jni_CallStaticCharMethodV,
+jni_CallStaticCharMethodA,
+jni_CallStaticShortMethod,
+jni_CallStaticShortMethodV,
+jni_CallStaticShortMethodA,
+jni_CallStaticIntMethod,
+jni_CallStaticIntMethodV,
+jni_CallStaticIntMethodA,
+jni_CallStaticLongMethod,
+jni_CallStaticLongMethodV,
+jni_CallStaticLongMethodA,
+jni_CallStaticFloatMethod,
+jni_CallStaticFloatMethodV,
+jni_CallStaticFloatMethodA,
+jni_CallStaticDoubleMethod,
+jni_CallStaticDoubleMethodV,
+jni_CallStaticDoubleMethodA,
+jni_CallStaticVoidMethod,
+jni_CallStaticVoidMethodV,
+jni_CallStaticVoidMethodA,
+jni_GetStaticFieldID,
+jni_GetStaticObjectField,
+jni_GetStaticBooleanField,
+jni_GetStaticByteField,
+jni_GetStaticCharField,
+jni_GetStaticShortField,
+jni_GetStaticIntField,
+jni_GetStaticLongField,
+jni_GetStaticFloatField,
+jni_GetStaticDoubleField,
+jni_SetStaticObjectField,
+jni_SetStaticBooleanField,
+jni_SetStaticByteField,
+jni_SetStaticCharField,
+jni_SetStaticShortField,
+jni_SetStaticIntField,
+jni_SetStaticLongField,
+jni_SetStaticFloatField,
+jni_SetStaticDoubleField,
+jni_NewString,
+jni_GetStringLength,
+jni_GetStringChars,
+jni_ReleaseStringChars,
+jni_NewStringUTF,
+jni_GetStringUTFLength,
+jni_GetStringUTFChars,
+jni_ReleaseStringUTFChars,
+jni_GetArrayLength,
+jni_NewObjectArray,
+jni_GetObjectArrayElement,
+jni_SetObjectArrayElement,
+jni_NewBooleanArray,
+jni_NewByteArray,
+jni_NewCharArray,
+jni_NewShortArray,
+jni_NewIntArray,
+jni_NewLongArray,
+jni_NewFloatArray,
+jni_NewDoubleArray,
+jni_GetBooleanArrayElements,
+jni_GetByteArrayElements,
+jni_GetCharArrayElements,
+jni_GetShortArrayElements,
+jni_GetIntArrayElements,
+jni_GetLongArrayElements,
+jni_GetFloatArrayElements,
+jni_GetDoubleArrayElements,
+jni_ReleaseBooleanArrayElements,
+jni_ReleaseByteArrayElements,
+jni_ReleaseCharArrayElements,
+jni_ReleaseShortArrayElements,
+jni_ReleaseIntArrayElements,
+jni_ReleaseLongArrayElements,
+jni_ReleaseFloatArrayElements,
+jni_ReleaseDoubleArrayElements,
+jni_GetBooleanArrayRegion,
+jni_GetByteArrayRegion,
+jni_GetCharArrayRegion,
+jni_GetShortArrayRegion,
+jni_GetIntArrayRegion,
+jni_GetLongArrayRegion,
+jni_GetFloatArrayRegion,
+jni_GetDoubleArrayRegion,
+jni_SetBooleanArrayRegion,
+jni_SetByteArrayRegion,
+jni_SetCharArrayRegion,
+jni_SetShortArrayRegion,
+jni_SetIntArrayRegion,
+jni_SetLongArrayRegion,
+jni_SetFloatArrayRegion,
+jni_SetDoubleArrayRegion,
+jni_RegisterNatives,
+jni_UnregisterNatives,
+jni_MonitorEnter,
+jni_MonitorExit,
+jni_GetJavaVM,
+jni_GetStringRegion,
+jni_GetStringUTFRegion,
+jni_GetPrimitiveArrayCritical,
+jni_ReleasePrimitiveArrayCritical,
+jni_GetStringCritical,
+jni_ReleaseStringCritical,
+jni_NewWeakGlobalRef,
+jni_DeleteWeakGlobalRef,
+jni_ExceptionCheck,
+jni_NewDirectByteBuffer,
+jni_GetDirectBufferAddress,
+jni_GetDirectBufferCapacity,
+// New 1_6 features
+jni_GetObjectRefType
+};
+// For jvmti use to modify jni function table.
+// Java threads in native contiues to run until it is transitioned
+// to VM at safepoint. Before the transition or before it is blocked
+// for safepoint it may access jni function table. VM could crash if
+// any java thread access the jni function table in the middle of memcpy.
+// To avoid this each function pointers are copied automically.
+void copy_jni_function_table(const struct JNINativeInterface_ *new_jni_NativeInterface) {
+assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint");
+intptr_t *a = (intptr_t *) jni_functions();
+intptr_t *b = (intptr_t *) new_jni_NativeInterface;
+for (uint i=0; i <  sizeof(struct JNINativeInterface_)/sizeof(void *); i++) {
+Atomic::store_ptr(*b++, a++);
+}
+}
+void quicken_jni_functions() {
+// Replace Get<Primitive>Field with fast versions
+if (UseFastJNIAccessors && !JvmtiExport::can_post_field_access()
+&& !VerifyJNIFields && !TraceJNICalls && !CountJNICalls && !CheckJNICalls
+#if defined(_WINDOWS) && defined(IA32) && defined(COMPILER2)
+// windows x86 currently needs SEH wrapper and the gain of the fast
+// versions currently isn't certain for server vm on uniprocessor.
+&& os::is_MP()
+#endif
+) {
+address func;
+func = JNI_FastGetField::generate_fast_get_boolean_field();
+if (func != (address)-1) {
+jni_NativeInterface.GetBooleanField = (GetBooleanField_t)func;
+}
+func = JNI_FastGetField::generate_fast_get_byte_field();
+if (func != (address)-1) {
+jni_NativeInterface.GetByteField = (GetByteField_t)func;
+}
+func = JNI_FastGetField::generate_fast_get_char_field();
+if (func != (address)-1) {
+jni_NativeInterface.GetCharField = (GetCharField_t)func;
+}
+func = JNI_FastGetField::generate_fast_get_short_field();
+if (func != (address)-1) {
+jni_NativeInterface.GetShortField = (GetShortField_t)func;
+}
+func = JNI_FastGetField::generate_fast_get_int_field();
+if (func != (address)-1) {
+jni_NativeInterface.GetIntField = (GetIntField_t)func;
+}
+func = JNI_FastGetField::generate_fast_get_long_field();
+if (func != (address)-1) {
+jni_NativeInterface.GetLongField = (GetLongField_t)func;
+}
+func = JNI_FastGetField::generate_fast_get_float_field();
+if (func != (address)-1) {
+jni_NativeInterface.GetFloatField = (GetFloatField_t)func;
+}
+func = JNI_FastGetField::generate_fast_get_double_field();
+if (func != (address)-1) {
+jni_NativeInterface.GetDoubleField = (GetDoubleField_t)func;
+}
+}
+}
+// Returns the function structure
+struct JNINativeInterface_* jni_functions() {
+#ifndef JNICHECK_KERNEL
+if (CheckJNICalls) return jni_functions_check();
+#else  // JNICHECK_KERNEL
+if (CheckJNICalls) warning("-Xcheck:jni is not supported in kernel vm.");
+#endif // JNICHECK_KERNEL
+return &jni_NativeInterface;
+}
+// Returns the function structure
+struct JNINativeInterface_* jni_functions_nocheck() {
+return &jni_NativeInterface;
+}
+// Invocation API
+// Forward declaration
+extern const struct JNIInvokeInterface_ jni_InvokeInterface;
+// Global invocation API vars
+volatile jint vm_created = 0;
+// Indicate whether it is safe to recreate VM
+volatile jint safe_to_recreate_vm = 1;
+struct JavaVM_ main_vm = {&jni_InvokeInterface};
+#define JAVASTACKSIZE (400 * 1024)    /* Default size of a thread java stack */
+#define PROCSTACKSIZE 0               /* 0 means default size in HPI */
+enum { VERIFY_NONE, VERIFY_REMOTE, VERIFY_ALL };
+HS_DTRACE_PROBE_DECL1(hotspot_jni, GetDefaultJavaVMInitArgs__entry, void*);
+DT_RETURN_MARK_DECL(GetDefaultJavaVMInitArgs, jint);
+_JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetDefaultJavaVMInitArgs(void *args_) {
+HS_DTRACE_PROBE1(hotspot_jni, GetDefaultJavaVMInitArgs__entry, args_);
+JDK1_1InitArgs *args = (JDK1_1InitArgs *)args_;
+jint ret = JNI_ERR;
+DT_RETURN_MARK(GetDefaultJavaVMInitArgs, jint, (const jint&)ret);
+if (Threads::is_supported_jni_version(args->version)) {
+ret = JNI_OK;
+}
+// 1.1 style no longer supported in hotspot.
+// According the JNI spec, we should update args->version on return.
+// We also use the structure to communicate with launcher about default
+// stack size.
+if (args->version == JNI_VERSION_1_1) {
+args->version = JNI_VERSION_1_2;
+// javaStackSize is int in arguments structure
+assert(jlong(ThreadStackSize) * K < INT_MAX, "integer overflow");
+args->javaStackSize = (jint)(ThreadStackSize * K);
+}
+return ret;
+}
+HS_DTRACE_PROBE_DECL3(hotspot_jni, CreateJavaVM__entry, vm, penv, args);
+DT_RETURN_MARK_DECL(CreateJavaVM, jint);
+_JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_CreateJavaVM(JavaVM **vm, void **penv, void *args) {
+HS_DTRACE_PROBE3(hotspot_jni, CreateJavaVM__entry, vm, penv, args);
+jint result = JNI_ERR;
+DT_RETURN_MARK(CreateJavaVM, jint, (const jint&)result);
+// At the moment it's only possible to have one Java VM,
+// since some of the runtime state is in global variables.
+// We cannot use our mutex locks here, since they only work on
+// Threads. We do an atomic compare and exchange to ensure only
+// one thread can call this method at a time
+// We use Atomic::xchg rather than Atomic::add/dec since on some platforms
+// the add/dec implementations are dependent on whether we are running
+// on a multiprocessor, and at this stage of initialization the os::is_MP
+// function used to determine this will always return false. Atomic::xchg
+// does not have this problem.
+if (Atomic::xchg(1, &vm_created) == 1) {
+return JNI_ERR;   // already created, or create attempt in progress
+}
+if (Atomic::xchg(0, &safe_to_recreate_vm) == 0) {
+return JNI_ERR;  // someone tried and failed and retry not allowed.
+}
+assert(vm_created == 1, "vm_created is true during the creation");
+/**
+* Certain errors during initialization are recoverable and do not
+* prevent this method from being called again at a later time
+* (perhaps with different arguments).  However, at a certain
+* point during initialization if an error occurs we cannot allow
+* this function to be called again (or it will crash).  In those
+* situations, the 'canTryAgain' flag is set to false, which atomically
+* sets safe_to_recreate_vm to 1, such that any new call to
+* JNI_CreateJavaVM will immediately fail using the above logic.
+*/
+bool can_try_again = true;
+result = Threads::create_vm((JavaVMInitArgs*) args, &can_try_again);
+if (result == JNI_OK) {
+JavaThread *thread = JavaThread::current();
+/* thread is thread_in_vm here */
+*vm = (JavaVM *)(&main_vm);
+*(JNIEnv**)penv = thread->jni_environment();
+// Tracks the time application was running before GC
+RuntimeService::record_application_start();
+// Notify JVMTI
+if (JvmtiExport::should_post_thread_life()) {
+JvmtiExport::post_thread_start(thread);
+}
+// Check if we should compile all classes on bootclasspath
+NOT_PRODUCT(if (CompileTheWorld) ClassLoader::compile_the_world();)
+// Since this is not a JVM_ENTRY we have to set the thread state manually before leaving.
+ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
+} else {
+if (can_try_again) {
+// reset safe_to_recreate_vm to 1 so that retrial would be possible
+safe_to_recreate_vm = 1;
+}
+// Creation failed. We must reset vm_created
+*vm = 0;
+*(JNIEnv**)penv = 0;
+// reset vm_created last to avoid race condition. Use OrderAccess to
+// control both compiler and architectural-based reordering.
+OrderAccess::release_store(&vm_created, 0);
+}
+return result;
+}
+HS_DTRACE_PROBE_DECL3(hotspot_jni, GetCreatedJavaVMs__entry, \
+JavaVM**, jsize, jsize*);
+HS_DTRACE_PROBE_DECL1(hotspot_jni, GetCreatedJavaVMs__return, jint);
+_JNI_IMPORT_OR_EXPORT_ jint JNICALL JNI_GetCreatedJavaVMs(JavaVM **vm_buf, jsize bufLen, jsize *numVMs) {
+// See bug 4367188, the wrapper can sometimes cause VM crashes
+// JNIWrapper("GetCreatedJavaVMs");
+HS_DTRACE_PROBE3(hotspot_jni, GetCreatedJavaVMs__entry, \
+vm_buf, bufLen, numVMs);
+if (vm_created) {
+if (numVMs != NULL) *numVMs = 1;
+if (bufLen > 0)     *vm_buf = (JavaVM *)(&main_vm);
+} else {
+if (numVMs != NULL) *numVMs = 0;
+}
+HS_DTRACE_PROBE1(hotspot_jni, GetCreatedJavaVMs__return, JNI_OK);
+return JNI_OK;
+}
+extern "C" {
+DT_RETURN_MARK_DECL(DestroyJavaVM, jint);
+jint JNICALL jni_DestroyJavaVM(JavaVM *vm) {
+DTRACE_PROBE1(hotspot_jni, DestroyJavaVM__entry, vm);
+jint res = JNI_ERR;
+DT_RETURN_MARK(DestroyJavaVM, jint, (const jint&)res);
+if (!vm_created) {
+res = JNI_ERR;
+return res;
+}
+JNIWrapper("DestroyJavaVM");
+JNIEnv *env;
+JavaVMAttachArgs destroyargs;
+destroyargs.version = CurrentVersion;
+destroyargs.name = (char *)"DestroyJavaVM";
+destroyargs.group = NULL;
+res = vm->AttachCurrentThread((void **)&env, (void *)&destroyargs);
+if (res != JNI_OK) {
+return res;
+}
+// Since this is not a JVM_ENTRY we have to set the thread state manually before entering.
+JavaThread* thread = JavaThread::current();
+ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
+if (Threads::destroy_vm()) {
+// Should not change thread state, VM is gone
+vm_created = false;
+res = JNI_OK;
+return res;
+} else {
+ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
+res = JNI_ERR;
+return res;
+}
+}
+static jint attach_current_thread(JavaVM *vm, void **penv, void *_args, bool daemon) {
+JavaVMAttachArgs *args = (JavaVMAttachArgs *) _args;
+// Check below commented out from JDK1.2fcs as well
+/*
+if (args && (args->version != JNI_VERSION_1_1 || args->version != JNI_VERSION_1_2)) {
+return JNI_EVERSION;
+}
+*/
+Thread* t = ThreadLocalStorage::get_thread_slow();
+if (t != NULL) {
+// If the thread has been attached this operation is a no-op
+*(JNIEnv**)penv = ((JavaThread*) t)->jni_environment();
+return JNI_OK;
+}
+// Create a thread and mark it as attaching so it will be skipped by the
+// ThreadsListEnumerator - see CR 6404306
+JavaThread* thread = new JavaThread(true);
+// Set correct safepoint info. The thread is going to call into Java when
+// initializing the Java level thread object. Hence, the correct state must
+// be set in order for the Safepoint code to deal with it correctly.
+thread->set_thread_state(_thread_in_vm);
+// Must do this before initialize_thread_local_storage
+thread->record_stack_base_and_size();
+thread->initialize_thread_local_storage();
+if (!os::create_attached_thread(thread)) {
+delete thread;
+return JNI_ERR;
+}
+thread->initialize_tlab();
+// Crucial that we do not have a safepoint check for this thread, since it has
+// not been added to the Thread list yet.
+{ Threads_lock->lock_without_safepoint_check();
+// This must be inside this lock in order to get FullGCALot to work properly, i.e., to
+// avoid this thread trying to do a GC before it is added to the thread-list
+thread->set_active_handles(JNIHandleBlock::allocate_block());
+Threads::add(thread, daemon);
+Threads_lock->unlock();
+}
+// Create thread group and name info from attach arguments
+oop group = NULL;
+char* thread_name = NULL;
+if (args != NULL && Threads::is_supported_jni_version(args->version)) {
+group = JNIHandles::resolve(args->group);
+thread_name = args->name; // may be NULL
+}
+if (group == NULL) group = Universe::main_thread_group();
+// Create Java level thread object and attach it to this thread
+bool attach_failed = false;
+{
+EXCEPTION_MARK;
+HandleMark hm(THREAD);
+Handle thread_group(THREAD, group);
+thread->allocate_threadObj(thread_group, thread_name, daemon, THREAD);
+if (HAS_PENDING_EXCEPTION) {
+CLEAR_PENDING_EXCEPTION;
+// cleanup outside the handle mark.
+attach_failed = true;
+}
+}
+if (attach_failed) {
+// Added missing cleanup
+thread->cleanup_failed_attach_current_thread();
+return JNI_ERR;
+}
+// mark the thread as no longer attaching
+// this uses a fence to push the change through so we don't have
+// to regrab the threads_lock
+thread->set_attached();
+// Enable stack overflow checks
+thread->create_stack_guard_pages();
+// Set java thread status.
+java_lang_Thread::set_thread_status(thread->threadObj(),
+java_lang_Thread::RUNNABLE);
+// Notify the debugger
+if (JvmtiExport::should_post_thread_life()) {
+JvmtiExport::post_thread_start(thread);
+}
+*(JNIEnv**)penv = thread->jni_environment();
+// Now leaving the VM, so change thread_state. This is normally automatically taken care
+// of in the JVM_ENTRY. But in this situation we have to do it manually. Notice, that by
+// using ThreadStateTransition::transition, we do a callback to the safepoint code if
+// needed.
+ThreadStateTransition::transition_and_fence(thread, _thread_in_vm, _thread_in_native);
+// Perform any platform dependent FPU setup
+os::setup_fpu();
+return JNI_OK;
+}
+jint JNICALL jni_AttachCurrentThread(JavaVM *vm, void **penv, void *_args) {
+DTRACE_PROBE3(hotspot_jni, AttachCurrentThread__entry, vm, penv, _args);
+if (!vm_created) {
+DTRACE_PROBE1(hotspot_jni, AttachCurrentThread__return, JNI_ERR);
+return JNI_ERR;
+}
+JNIWrapper("AttachCurrentThread");
+jint ret = attach_current_thread(vm, penv, _args, false);
+DTRACE_PROBE1(hotspot_jni, AttachCurrentThread__return, ret);
+return ret;
+}
+jint JNICALL jni_DetachCurrentThread(JavaVM *vm)  {
+DTRACE_PROBE1(hotspot_jni, DetachCurrentThread__entry, vm);
+VM_Exit::block_if_vm_exited();
+JNIWrapper("DetachCurrentThread");
+// If the thread has been deattacted the operations is a no-op
+if (ThreadLocalStorage::thread() == NULL) {
+DTRACE_PROBE1(hotspot_jni, DetachCurrentThread__return, JNI_OK);
+return JNI_OK;
+}
+JavaThread* thread = JavaThread::current();
+if (thread->has_last_Java_frame()) {
+DTRACE_PROBE1(hotspot_jni, DetachCurrentThread__return, JNI_ERR);
+// Can't detach a thread that's running java, that can't work.
+return JNI_ERR;
+}
+// Safepoint support. Have to do call-back to safepoint code, if in the
+// middel of a safepoint operation
+ThreadStateTransition::transition_from_native(thread, _thread_in_vm);
+// XXX: Note that JavaThread::exit() call below removes the guards on the
+// stack pages set up via enable_stack_{red,yellow}_zone() calls
+// above in jni_AttachCurrentThread. Unfortunately, while the setting
+// of the guards is visible in jni_AttachCurrentThread above,
+// the removal of the guards is buried below in JavaThread::exit()
+// here. The abstraction should be more symmetrically either exposed
+// or hidden (e.g. it could probably be hidden in the same
+// (platform-dependent) methods where we do alternate stack
+// maintenance work?)
+thread->exit(false, JavaThread::jni_detach);
+delete thread;
+DTRACE_PROBE1(hotspot_jni, DetachCurrentThread__return, JNI_OK);
+return JNI_OK;
+}
+DT_RETURN_MARK_DECL(GetEnv, jint);
+jint JNICALL jni_GetEnv(JavaVM *vm, void **penv, jint version) {
+DTRACE_PROBE3(hotspot_jni, GetEnv__entry, vm, penv, version);
+jint ret = JNI_ERR;
+DT_RETURN_MARK(GetEnv, jint, (const jint&)ret);
+if (!vm_created) {
+*penv = NULL;
+ret = JNI_EDETACHED;
+return ret;
+}
+if (JvmtiExport::is_jvmti_version(version)) {
+ret = JvmtiExport::get_jvmti_interface(vm, penv, version);
+return ret;
+}
+#ifndef JVMPI_VERSION_1
+// need these in order to be polite about older agents
+#define JVMPI_VERSION_1   ((jint)0x10000001)
+#define JVMPI_VERSION_1_1 ((jint)0x10000002)
+#define JVMPI_VERSION_1_2 ((jint)0x10000003)
+#endif // !JVMPI_VERSION_1
+Thread* thread = ThreadLocalStorage::thread();
+if (thread != NULL && thread->is_Java_thread()) {
+if (Threads::is_supported_jni_version_including_1_1(version)) {
+*(JNIEnv**)penv = ((JavaThread*) thread)->jni_environment();
+ret = JNI_OK;
+return ret;
+} else if (version == JVMPI_VERSION_1 ||
+version == JVMPI_VERSION_1_1 ||
+version == JVMPI_VERSION_1_2) {
+tty->print_cr("ERROR: JVMPI, an experimental interface, is no longer supported.");
+tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
+ret = JNI_EVERSION;
+return ret;
+} else if (JvmtiExport::is_jvmdi_version(version)) {
+tty->print_cr("FATAL ERROR: JVMDI is no longer supported.");
+tty->print_cr("Please use the supported interface: the JVM Tool Interface (JVM TI).");
+ret = JNI_EVERSION;
+return ret;
+} else {
+*penv = NULL;
+ret = JNI_EVERSION;
+return ret;
+}
+} else {
+*penv = NULL;
+ret = JNI_EDETACHED;
+return ret;
+}
+}
+jint JNICALL jni_AttachCurrentThreadAsDaemon(JavaVM *vm, void **penv, void *_args) {
+DTRACE_PROBE3(hotspot_jni, AttachCurrentThreadAsDaemon__entry, vm, penv, _args);
+if (!vm_created) {
+DTRACE_PROBE1(hotspot_jni, AttachCurrentThreadAsDaemon__return, JNI_ERR);
+return JNI_ERR;
+}
+JNIWrapper("AttachCurrentThreadAsDaemon");
+jint ret = attach_current_thread(vm, penv, _args, true);
+DTRACE_PROBE1(hotspot_jni, AttachCurrentThreadAsDaemon__return, ret);
+return ret;
+}
+} // End extern "C"
+const struct JNIInvokeInterface_ jni_InvokeInterface = {
+NULL,
+NULL,
+NULL,
+jni_DestroyJavaVM,
+jni_AttachCurrentThread,
+jni_DetachCurrentThread,
+jni_GetEnv,
+jni_AttachCurrentThreadAsDaemon
+};

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

comparison: src/share/vm/prims/jni.cpp

src/share/vm/prims/jni.cpp