--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/prims/jni.cpp Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,3582 @@
+/*
+ * 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
+};