Mercurial > hg > graal-compiler
view src/share/vm/prims/jni.cpp @ 2873:810e2d253e00
Adjusted startup classpath.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
---|---|
date | Wed, 08 Jun 2011 08:45:47 +0200 |
parents | 0654ee04b214 |
children | 75a99b4f1c98 |
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/* * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #include "classfile/classLoader.hpp" #include "classfile/javaClasses.hpp" #include "classfile/symbolTable.hpp" #include "classfile/systemDictionary.hpp" #include "classfile/vmSymbols.hpp" #include "interpreter/linkResolver.hpp" #include "memory/allocation.inline.hpp" #include "memory/gcLocker.inline.hpp" #include "memory/oopFactory.hpp" #include "memory/universe.inline.hpp" #include "oops/instanceKlass.hpp" #include "oops/instanceOop.hpp" #include "oops/markOop.hpp" #include "oops/methodOop.hpp" #include "oops/objArrayKlass.hpp" #include "oops/objArrayOop.hpp" #include "oops/oop.inline.hpp" #include "oops/symbol.hpp" #include "oops/typeArrayKlass.hpp" #include "oops/typeArrayOop.hpp" #include "prims/jni.h" #include "prims/jniCheck.hpp" #include "prims/jniFastGetField.hpp" #include "prims/jvm.h" #include "prims/jvm_misc.hpp" #include "prims/jvmtiExport.hpp" #include "prims/jvmtiThreadState.hpp" #include "runtime/compilationPolicy.hpp" #include "runtime/fieldDescriptor.hpp" #include "runtime/fprofiler.hpp" #include "runtime/handles.inline.hpp" #include "runtime/interfaceSupport.hpp" #include "runtime/java.hpp" #include "runtime/javaCalls.hpp" #include "runtime/jfieldIDWorkaround.hpp" #include "runtime/reflection.hpp" #include "runtime/sharedRuntime.hpp" #include "runtime/signature.hpp" #include "runtime/vm_operations.hpp" #include "services/runtimeService.hpp" #include "utilities/defaultStream.hpp" #include "utilities/dtrace.hpp" #include "utilities/events.hpp" #include "utilities/histogram.hpp" #ifdef TARGET_ARCH_x86 # include "jniTypes_x86.hpp" #endif #ifdef TARGET_ARCH_sparc # include "jniTypes_sparc.hpp" #endif #ifdef TARGET_ARCH_zero # include "jniTypes_zero.hpp" #endif #ifdef TARGET_OS_FAMILY_linux # include "os_linux.inline.hpp" # include "thread_linux.inline.hpp" #endif #ifdef TARGET_OS_FAMILY_solaris # include "os_solaris.inline.hpp" # include "thread_solaris.inline.hpp" #endif #ifdef TARGET_OS_FAMILY_windows # include "os_windows.inline.hpp" # include "thread_windows.inline.hpp" #endif static jint CurrentVersion = JNI_VERSION_1_6; // The DT_RETURN_MARK macros create a scoped object to fire the dtrace // '-return' probe regardless of the return path is taken out of the function. // Methods that have multiple return paths use this to avoid having to // instrument each return path. Methods that use CHECK or THROW must use this // since those macros can cause an immedate uninstrumented return. // // In order to get the return value, a reference to the variable containing // the return value must be passed to the contructor of the object, and // the return value must be set before return (since the mark object has // a reference to it). // // Example: // DT_RETURN_MARK_DECL(SomeFunc, int); // JNI_ENTRY(int, SomeFunc, ...) // int return_value = 0; // DT_RETURN_MARK(SomeFunc, int, (const int&)return_value); // foo(CHECK_0) // return_value = 5; // return return_value; // JNI_END #define DT_RETURN_MARK_DECL(name, type) \ HS_DTRACE_PROBE_DECL1(hotspot_jni, name##__return, type); \ DTRACE_ONLY( \ class DTraceReturnProbeMark_##name { \ public: \ const type& _ret_ref; \ DTraceReturnProbeMark_##name(const type& v) : _ret_ref(v) {} \ ~DTraceReturnProbeMark_##name() { \ HS_DTRACE_PROBE1(hotspot_jni, name##__return, _ret_ref); \ } \ } \ ) // Void functions are simpler since there's no return value #define DT_VOID_RETURN_MARK_DECL(name) \ HS_DTRACE_PROBE_DECL0(hotspot_jni, name##__return); \ DTRACE_ONLY( \ class DTraceReturnProbeMark_##name { \ public: \ ~DTraceReturnProbeMark_##name() { \ HS_DTRACE_PROBE0(hotspot_jni, name##__return); \ } \ } \ ) // Place these macros in the function to mark the return. Non-void // functions need the type and address of the return value. #define DT_RETURN_MARK(name, type, ref) \ DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark(ref) ) #define DT_VOID_RETURN_MARK(name) \ DTRACE_ONLY( DTraceReturnProbeMark_##name dtrace_return_mark ) // Use these to select distinct code for floating-point vs. non-floating point // situations. Used from within common macros where we need slightly // different behavior for Float/Double #define FP_SELECT_Boolean(intcode, fpcode) intcode #define FP_SELECT_Byte(intcode, fpcode) intcode #define FP_SELECT_Char(intcode, fpcode) intcode #define FP_SELECT_Short(intcode, fpcode) intcode #define FP_SELECT_Object(intcode, fpcode) intcode #define FP_SELECT_Int(intcode, fpcode) intcode #define FP_SELECT_Long(intcode, fpcode) intcode #define FP_SELECT_Float(intcode, fpcode) fpcode #define FP_SELECT_Double(intcode, fpcode) fpcode #define FP_SELECT(TypeName, intcode, fpcode) \ FP_SELECT_##TypeName(intcode, fpcode) #define COMMA , // Choose DT_RETURN_MARK macros based on the type: float/double -> void // (dtrace doesn't do FP yet) #define DT_RETURN_MARK_DECL_FOR(TypeName, name, type) \ FP_SELECT(TypeName, \ DT_RETURN_MARK_DECL(name, type), DT_VOID_RETURN_MARK_DECL(name) ) #define DT_RETURN_MARK_FOR(TypeName, name, type, ref) \ FP_SELECT(TypeName, \ DT_RETURN_MARK(name, type, ref), DT_VOID_RETURN_MARK(name) ) // out-of-line helpers for class jfieldIDWorkaround: bool jfieldIDWorkaround::is_valid_jfieldID(klassOop k, jfieldID id) { if (jfieldIDWorkaround::is_instance_jfieldID(k, id)) { uintptr_t as_uint = (uintptr_t) id; intptr_t offset = raw_instance_offset(id); if (is_checked_jfieldID(id)) { if (!klass_hash_ok(k, id)) { return false; } } return instanceKlass::cast(k)->contains_field_offset(offset); } else { JNIid* result = (JNIid*) id; #ifdef ASSERT return result != NULL && result->is_static_field_id(); #else return result != NULL; #endif } } intptr_t jfieldIDWorkaround::encode_klass_hash(klassOop k, intptr_t offset) { if (offset <= small_offset_mask) { klassOop field_klass = k; klassOop super_klass = Klass::cast(field_klass)->super(); // With compressed oops the most super class with nonstatic fields would // be the owner of fields embedded in the header. while (instanceKlass::cast(super_klass)->has_nonstatic_fields() && instanceKlass::cast(super_klass)->contains_field_offset(offset)) { field_klass = super_klass; // super contains the field also super_klass = Klass::cast(field_klass)->super(); } debug_only(No_Safepoint_Verifier nosafepoint;) uintptr_t klass_hash = field_klass->identity_hash(); return ((klass_hash & klass_mask) << klass_shift) | checked_mask_in_place; } else { #if 0 #ifndef PRODUCT { ResourceMark rm; warning("VerifyJNIFields: long offset %d in %s", offset, Klass::cast(k)->external_name()); } #endif #endif return 0; } } bool jfieldIDWorkaround::klass_hash_ok(klassOop k, jfieldID id) { uintptr_t as_uint = (uintptr_t) id; intptr_t klass_hash = (as_uint >> klass_shift) & klass_mask; do { debug_only(No_Safepoint_Verifier nosafepoint;) // Could use a non-blocking query for identity_hash here... if ((k->identity_hash() & klass_mask) == klass_hash) return true; k = Klass::cast(k)->super(); } while (k != NULL); return false; } void jfieldIDWorkaround::verify_instance_jfieldID(klassOop k, jfieldID id) { guarantee(jfieldIDWorkaround::is_instance_jfieldID(k, id), "must be an instance field" ); uintptr_t as_uint = (uintptr_t) id; intptr_t offset = raw_instance_offset(id); if (VerifyJNIFields) { if (is_checked_jfieldID(id)) { guarantee(klass_hash_ok(k, id), "Bug in native code: jfieldID class must match object"); } else { #if 0 #ifndef PRODUCT if (Verbose) { ResourceMark rm; warning("VerifyJNIFields: unverified offset %d for %s", offset, Klass::cast(k)->external_name()); } #endif #endif } } guarantee(instanceKlass::cast(k)->contains_field_offset(offset), "Bug in native code: jfieldID offset must address interior of object"); } // Pick a reasonable higher bound for local capacity requested // for EnsureLocalCapacity and PushLocalFrame. We don't want it too // high because a test (or very unusual application) may try to allocate // that many handles and run out of swap space. An implementation is // permitted to allocate more handles than the ensured capacity, so this // value is set high enough to prevent compatibility problems. const int MAX_REASONABLE_LOCAL_CAPACITY = 4*K; // Wrapper to trace JNI functions #ifdef ASSERT Histogram* JNIHistogram; static volatile jint JNIHistogram_lock = 0; class JNITraceWrapper : public StackObj { public: JNITraceWrapper(const char* format, ...) { if (TraceJNICalls) { va_list ap; va_start(ap, format); tty->print("JNI "); tty->vprint_cr(format, ap); va_end(ap); } } }; class JNIHistogramElement : public HistogramElement { public: JNIHistogramElement(const char* name); }; JNIHistogramElement::JNIHistogramElement(const char* elementName) { _name = elementName; uintx count = 0; while (Atomic::cmpxchg(1, &JNIHistogram_lock, 0) != 0) { while (OrderAccess::load_acquire(&JNIHistogram_lock) != 0) { count +=1; if ( (WarnOnStalledSpinLock > 0) && (count % WarnOnStalledSpinLock == 0)) { warning("JNIHistogram_lock seems to be stalled"); } } } if(JNIHistogram == NULL) JNIHistogram = new Histogram("JNI Call Counts",100); JNIHistogram->add_element(this); Atomic::dec(&JNIHistogram_lock); } #define JNICountWrapper(arg) \ static JNIHistogramElement* e = new JNIHistogramElement(arg); \ /* There is a MT-race condition in VC++. So we need to make sure that that e has been initialized */ \ if (e != NULL) e->increment_count() #define JNIWrapper(arg) JNICountWrapper(arg); JNITraceWrapper(arg) #else #define JNIWrapper(arg) #endif // Implementation of JNI entries DT_RETURN_MARK_DECL(DefineClass, jclass); JNI_ENTRY(jclass, jni_DefineClass(JNIEnv *env, const char *name, jobject loaderRef, const jbyte *buf, jsize bufLen)) JNIWrapper("DefineClass"); DTRACE_PROBE5(hotspot_jni, DefineClass__entry, env, name, loaderRef, buf, bufLen); jclass cls = NULL; DT_RETURN_MARK(DefineClass, jclass, (const jclass&)cls); // Since exceptions can be thrown, class initialization can take place // if name is NULL no check for class name in .class stream has to be made. if (name != NULL) { const int str_len = (int)strlen(name); if (str_len > Symbol::max_length()) { // It's impossible to create this class; the name cannot fit // into the constant pool. THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); } } TempNewSymbol class_name = SymbolTable::new_symbol(name, THREAD); ResourceMark rm(THREAD); ClassFileStream st((u1*) buf, bufLen, NULL); Handle class_loader (THREAD, JNIHandles::resolve(loaderRef)); if (UsePerfData && !class_loader.is_null()) { // check whether the current caller thread holds the lock or not. // If not, increment the corresponding counter if (ObjectSynchronizer:: query_lock_ownership((JavaThread*)THREAD, class_loader) != ObjectSynchronizer::owner_self) { ClassLoader::sync_JNIDefineClassLockFreeCounter()->inc(); } } klassOop k = SystemDictionary::resolve_from_stream(class_name, class_loader, Handle(), &st, true, CHECK_NULL); if (TraceClassResolution && k != NULL) { trace_class_resolution(k); } cls = (jclass)JNIHandles::make_local( env, Klass::cast(k)->java_mirror()); return cls; JNI_END static bool first_time_FindClass = true; DT_RETURN_MARK_DECL(FindClass, jclass); JNI_ENTRY(jclass, jni_FindClass(JNIEnv *env, const char *name)) JNIWrapper("FindClass"); DTRACE_PROBE2(hotspot_jni, FindClass__entry, env, name); jclass result = NULL; DT_RETURN_MARK(FindClass, jclass, (const jclass&)result); // Remember if we are the first invocation of jni_FindClass bool first_time = first_time_FindClass; first_time_FindClass = false; // Sanity check the name: it cannot be null or larger than the maximum size // name we can fit in the constant pool. if (name == NULL || (int)strlen(name) > Symbol::max_length()) { THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); } //%note jni_3 Handle loader; Handle protection_domain; // Find calling class instanceKlassHandle k (THREAD, thread->security_get_caller_class(0)); if (k.not_null()) { loader = Handle(THREAD, k->class_loader()); // Special handling to make sure JNI_OnLoad and JNI_OnUnload are executed // in the correct class context. if (loader.is_null() && k->name() == vmSymbols::java_lang_ClassLoader_NativeLibrary()) { JavaValue result(T_OBJECT); JavaCalls::call_static(&result, k, vmSymbols::getFromClass_name(), vmSymbols::void_class_signature(), thread); if (HAS_PENDING_EXCEPTION) { Handle ex(thread, thread->pending_exception()); CLEAR_PENDING_EXCEPTION; THROW_HANDLE_0(ex); } oop mirror = (oop) result.get_jobject(); loader = Handle(THREAD, instanceKlass::cast(java_lang_Class::as_klassOop(mirror))->class_loader()); protection_domain = Handle(THREAD, instanceKlass::cast(java_lang_Class::as_klassOop(mirror))->protection_domain()); } } else { // We call ClassLoader.getSystemClassLoader to obtain the system class loader. loader = Handle(THREAD, SystemDictionary::java_system_loader()); } TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, thread); if (TraceClassResolution && result != NULL) { trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result))); } // If we were the first invocation of jni_FindClass, we enable compilation again // rather than just allowing invocation counter to overflow and decay. // Controlled by flag DelayCompilationDuringStartup. if (first_time && !CompileTheWorld) CompilationPolicy::completed_vm_startup(); return result; JNI_END DT_RETURN_MARK_DECL(FromReflectedMethod, jmethodID); JNI_ENTRY(jmethodID, jni_FromReflectedMethod(JNIEnv *env, jobject method)) JNIWrapper("FromReflectedMethod"); DTRACE_PROBE2(hotspot_jni, FromReflectedMethod__entry, env, method); jmethodID ret = NULL; DT_RETURN_MARK(FromReflectedMethod, jmethodID, (const jmethodID&)ret); // method is a handle to a java.lang.reflect.Method object oop reflected = JNIHandles::resolve_non_null(method); oop mirror = NULL; int slot = 0; if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { mirror = java_lang_reflect_Constructor::clazz(reflected); slot = java_lang_reflect_Constructor::slot(reflected); } else { assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), "wrong type"); mirror = java_lang_reflect_Method::clazz(reflected); slot = java_lang_reflect_Method::slot(reflected); } klassOop k = java_lang_Class::as_klassOop(mirror); KlassHandle k1(THREAD, k); // Make sure class is initialized before handing id's out to methods Klass::cast(k1())->initialize(CHECK_NULL); methodOop m = instanceKlass::cast(k1())->method_with_idnum(slot); ret = m==NULL? NULL : m->jmethod_id(); // return NULL if reflected method deleted return ret; JNI_END DT_RETURN_MARK_DECL(FromReflectedField, jfieldID); JNI_ENTRY(jfieldID, jni_FromReflectedField(JNIEnv *env, jobject field)) JNIWrapper("FromReflectedField"); DTRACE_PROBE2(hotspot_jni, FromReflectedField__entry, env, field); jfieldID ret = NULL; DT_RETURN_MARK(FromReflectedField, jfieldID, (const jfieldID&)ret); // field is a handle to a java.lang.reflect.Field object oop reflected = JNIHandles::resolve_non_null(field); oop mirror = java_lang_reflect_Field::clazz(reflected); klassOop k = java_lang_Class::as_klassOop(mirror); int slot = java_lang_reflect_Field::slot(reflected); int modifiers = java_lang_reflect_Field::modifiers(reflected); KlassHandle k1(THREAD, k); // Make sure class is initialized before handing id's out to fields Klass::cast(k1())->initialize(CHECK_NULL); // First check if this is a static field if (modifiers & JVM_ACC_STATIC) { intptr_t offset = instanceKlass::cast(k1())->offset_from_fields( slot ); JNIid* id = instanceKlass::cast(k1())->jni_id_for(offset); assert(id != NULL, "corrupt Field object"); debug_only(id->set_is_static_field_id();) // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the klassOop ret = jfieldIDWorkaround::to_static_jfieldID(id); return ret; } // The slot is the index of the field description in the field-array // The jfieldID is the offset of the field within the object // It may also have hash bits for k, if VerifyJNIFields is turned on. intptr_t offset = instanceKlass::cast(k1())->offset_from_fields( slot ); assert(instanceKlass::cast(k1())->contains_field_offset(offset), "stay within object"); ret = jfieldIDWorkaround::to_instance_jfieldID(k1(), offset); return ret; JNI_END DT_RETURN_MARK_DECL(ToReflectedMethod, jobject); JNI_ENTRY(jobject, jni_ToReflectedMethod(JNIEnv *env, jclass cls, jmethodID method_id, jboolean isStatic)) JNIWrapper("ToReflectedMethod"); DTRACE_PROBE4(hotspot_jni, ToReflectedMethod__entry, env, cls, method_id, isStatic); jobject ret = NULL; DT_RETURN_MARK(ToReflectedMethod, jobject, (const jobject&)ret); methodHandle m (THREAD, JNIHandles::resolve_jmethod_id(method_id)); assert(m->is_static() == (isStatic != 0), "jni_ToReflectedMethod access flags doesn't match"); oop reflection_method; if (m->is_initializer()) { reflection_method = Reflection::new_constructor(m, CHECK_NULL); } else { reflection_method = Reflection::new_method(m, UseNewReflection, false, CHECK_NULL); } ret = JNIHandles::make_local(env, reflection_method); return ret; JNI_END DT_RETURN_MARK_DECL(GetSuperclass, jclass); JNI_ENTRY(jclass, jni_GetSuperclass(JNIEnv *env, jclass sub)) JNIWrapper("GetSuperclass"); DTRACE_PROBE2(hotspot_jni, GetSuperclass__entry, env, sub); jclass obj = NULL; DT_RETURN_MARK(GetSuperclass, jclass, (const jclass&)obj); oop mirror = JNIHandles::resolve_non_null(sub); // primitive classes return NULL if (java_lang_Class::is_primitive(mirror)) return NULL; // Rules of Class.getSuperClass as implemented by KLass::java_super: // arrays return Object // interfaces return NULL // proper classes return Klass::super() klassOop k = java_lang_Class::as_klassOop(mirror); if (Klass::cast(k)->is_interface()) return NULL; // return mirror for superclass klassOop super = Klass::cast(k)->java_super(); // super2 is the value computed by the compiler's getSuperClass intrinsic: debug_only(klassOop super2 = ( Klass::cast(k)->oop_is_javaArray() ? SystemDictionary::Object_klass() : Klass::cast(k)->super() ) ); assert(super == super2, "java_super computation depends on interface, array, other super"); obj = (super == NULL) ? NULL : (jclass) JNIHandles::make_local(Klass::cast(super)->java_mirror()); return obj; JNI_END JNI_QUICK_ENTRY(jboolean, jni_IsAssignableFrom(JNIEnv *env, jclass sub, jclass super)) JNIWrapper("IsSubclassOf"); DTRACE_PROBE3(hotspot_jni, IsAssignableFrom__entry, env, sub, super); oop sub_mirror = JNIHandles::resolve_non_null(sub); oop super_mirror = JNIHandles::resolve_non_null(super); if (java_lang_Class::is_primitive(sub_mirror) || java_lang_Class::is_primitive(super_mirror)) { jboolean ret = (sub_mirror == super_mirror); DTRACE_PROBE1(hotspot_jni, IsAssignableFrom__return, ret); return ret; } klassOop sub_klass = java_lang_Class::as_klassOop(sub_mirror); klassOop super_klass = java_lang_Class::as_klassOop(super_mirror); assert(sub_klass != NULL && super_klass != NULL, "invalid arguments to jni_IsAssignableFrom"); jboolean ret = Klass::cast(sub_klass)->is_subtype_of(super_klass) ? JNI_TRUE : JNI_FALSE; DTRACE_PROBE1(hotspot_jni, IsAssignableFrom__return, ret); return ret; JNI_END DT_RETURN_MARK_DECL(Throw, jint); JNI_ENTRY(jint, jni_Throw(JNIEnv *env, jthrowable obj)) JNIWrapper("Throw"); DTRACE_PROBE2(hotspot_jni, Throw__entry, env, obj); jint ret = JNI_OK; DT_RETURN_MARK(Throw, jint, (const jint&)ret); THROW_OOP_(JNIHandles::resolve(obj), JNI_OK); ShouldNotReachHere(); JNI_END DT_RETURN_MARK_DECL(ThrowNew, jint); JNI_ENTRY(jint, jni_ThrowNew(JNIEnv *env, jclass clazz, const char *message)) JNIWrapper("ThrowNew"); DTRACE_PROBE3(hotspot_jni, ThrowNew__entry, env, clazz, message); jint ret = JNI_OK; DT_RETURN_MARK(ThrowNew, jint, (const jint&)ret); instanceKlass* k = instanceKlass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); Symbol* name = k->name(); Handle class_loader (THREAD, k->class_loader()); Handle protection_domain (THREAD, k->protection_domain()); THROW_MSG_LOADER_(name, (char *)message, class_loader, protection_domain, JNI_OK); ShouldNotReachHere(); JNI_END // JNI functions only transform a pending async exception to a synchronous // exception in ExceptionOccurred and ExceptionCheck calls, since // delivering an async exception in other places won't change the native // code's control flow and would be harmful when native code further calls // JNI functions with a pending exception. Async exception is also checked // during the call, so ExceptionOccurred/ExceptionCheck won't return // false but deliver the async exception at the very end during // state transition. static void jni_check_async_exceptions(JavaThread *thread) { assert(thread == Thread::current(), "must be itself"); thread->check_and_handle_async_exceptions(); } JNI_ENTRY_NO_PRESERVE(jthrowable, jni_ExceptionOccurred(JNIEnv *env)) JNIWrapper("ExceptionOccurred"); DTRACE_PROBE1(hotspot_jni, ExceptionOccurred__entry, env); jni_check_async_exceptions(thread); oop exception = thread->pending_exception(); jthrowable ret = (jthrowable) JNIHandles::make_local(env, exception); DTRACE_PROBE1(hotspot_jni, ExceptionOccurred__return, ret); return ret; JNI_END JNI_ENTRY_NO_PRESERVE(void, jni_ExceptionDescribe(JNIEnv *env)) JNIWrapper("ExceptionDescribe"); DTRACE_PROBE1(hotspot_jni, ExceptionDescribe__entry, env); if (thread->has_pending_exception()) { Handle ex(thread, thread->pending_exception()); thread->clear_pending_exception(); if (ex->is_a(SystemDictionary::ThreadDeath_klass())) { // Don't print anything if we are being killed. } else { jio_fprintf(defaultStream::error_stream(), "Exception "); if (thread != NULL && thread->threadObj() != NULL) { ResourceMark rm(THREAD); jio_fprintf(defaultStream::error_stream(), "in thread \"%s\" ", thread->get_thread_name()); } if (ex->is_a(SystemDictionary::Throwable_klass())) { JavaValue result(T_VOID); JavaCalls::call_virtual(&result, ex, KlassHandle(THREAD, SystemDictionary::Throwable_klass()), vmSymbols::printStackTrace_name(), vmSymbols::void_method_signature(), THREAD); // If an exception is thrown in the call it gets thrown away. Not much // we can do with it. The native code that calls this, does not check // for the exception - hence, it might still be in the thread when DestroyVM gets // called, potentially causing a few asserts to trigger - since no pending exception // is expected. CLEAR_PENDING_EXCEPTION; } else { ResourceMark rm(THREAD); jio_fprintf(defaultStream::error_stream(), ". Uncaught exception of type %s.", Klass::cast(ex->klass())->external_name()); } } } DTRACE_PROBE(hotspot_jni, ExceptionDescribe__return); JNI_END JNI_QUICK_ENTRY(void, jni_ExceptionClear(JNIEnv *env)) JNIWrapper("ExceptionClear"); DTRACE_PROBE1(hotspot_jni, ExceptionClear__entry, env); // The jni code might be using this API to clear java thrown exception. // So just mark jvmti thread exception state as exception caught. JvmtiThreadState *state = JavaThread::current()->jvmti_thread_state(); if (state != NULL && state->is_exception_detected()) { state->set_exception_caught(); } thread->clear_pending_exception(); DTRACE_PROBE(hotspot_jni, ExceptionClear__return); JNI_END JNI_ENTRY(void, jni_FatalError(JNIEnv *env, const char *msg)) JNIWrapper("FatalError"); DTRACE_PROBE2(hotspot_jni, FatalError__entry, env, msg); tty->print_cr("FATAL ERROR in native method: %s", msg); thread->print_stack(); os::abort(); // Dump core and abort JNI_END JNI_ENTRY(jint, jni_PushLocalFrame(JNIEnv *env, jint capacity)) JNIWrapper("PushLocalFrame"); DTRACE_PROBE2(hotspot_jni, PushLocalFrame__entry, env, capacity); //%note jni_11 if (capacity < 0 && capacity > MAX_REASONABLE_LOCAL_CAPACITY) { DTRACE_PROBE1(hotspot_jni, PushLocalFrame__return, JNI_ERR); return JNI_ERR; } JNIHandleBlock* old_handles = thread->active_handles(); JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); assert(new_handles != NULL, "should not be NULL"); new_handles->set_pop_frame_link(old_handles); thread->set_active_handles(new_handles); jint ret = JNI_OK; DTRACE_PROBE1(hotspot_jni, PushLocalFrame__return, ret); return ret; JNI_END JNI_ENTRY(jobject, jni_PopLocalFrame(JNIEnv *env, jobject result)) JNIWrapper("PopLocalFrame"); DTRACE_PROBE2(hotspot_jni, PopLocalFrame__entry, env, result); //%note jni_11 Handle result_handle(thread, JNIHandles::resolve(result)); JNIHandleBlock* old_handles = thread->active_handles(); JNIHandleBlock* new_handles = old_handles->pop_frame_link(); if (new_handles != NULL) { // As a sanity check we only release the handle blocks if the pop_frame_link is not NULL. // This way code will still work if PopLocalFrame is called without a corresponding // PushLocalFrame call. Note that we set the pop_frame_link to NULL explicitly, otherwise // the release_block call will release the blocks. thread->set_active_handles(new_handles); old_handles->set_pop_frame_link(NULL); // clear link we won't release new_handles below JNIHandleBlock::release_block(old_handles, thread); // may block result = JNIHandles::make_local(thread, result_handle()); } DTRACE_PROBE1(hotspot_jni, PopLocalFrame__return, result); return result; JNI_END JNI_ENTRY(jobject, jni_NewGlobalRef(JNIEnv *env, jobject ref)) JNIWrapper("NewGlobalRef"); DTRACE_PROBE2(hotspot_jni, NewGlobalRef__entry, env, ref); Handle ref_handle(thread, JNIHandles::resolve(ref)); jobject ret = JNIHandles::make_global(ref_handle); DTRACE_PROBE1(hotspot_jni, NewGlobalRef__return, ret); return ret; JNI_END // Must be JNI_ENTRY (with HandleMark) JNI_ENTRY_NO_PRESERVE(void, jni_DeleteGlobalRef(JNIEnv *env, jobject ref)) JNIWrapper("DeleteGlobalRef"); DTRACE_PROBE2(hotspot_jni, DeleteGlobalRef__entry, env, ref); JNIHandles::destroy_global(ref); DTRACE_PROBE(hotspot_jni, DeleteGlobalRef__return); JNI_END JNI_QUICK_ENTRY(void, jni_DeleteLocalRef(JNIEnv *env, jobject obj)) JNIWrapper("DeleteLocalRef"); DTRACE_PROBE2(hotspot_jni, DeleteLocalRef__entry, env, obj); JNIHandles::destroy_local(obj); DTRACE_PROBE(hotspot_jni, DeleteLocalRef__return); JNI_END JNI_QUICK_ENTRY(jboolean, jni_IsSameObject(JNIEnv *env, jobject r1, jobject r2)) JNIWrapper("IsSameObject"); DTRACE_PROBE3(hotspot_jni, IsSameObject__entry, env, r1, r2); oop a = JNIHandles::resolve(r1); oop b = JNIHandles::resolve(r2); jboolean ret = (a == b) ? JNI_TRUE : JNI_FALSE; DTRACE_PROBE1(hotspot_jni, IsSameObject__return, ret); return ret; JNI_END JNI_ENTRY(jobject, jni_NewLocalRef(JNIEnv *env, jobject ref)) JNIWrapper("NewLocalRef"); DTRACE_PROBE2(hotspot_jni, NewLocalRef__entry, env, ref); jobject ret = JNIHandles::make_local(env, JNIHandles::resolve(ref)); DTRACE_PROBE1(hotspot_jni, NewLocalRef__return, ret); return ret; JNI_END JNI_LEAF(jint, jni_EnsureLocalCapacity(JNIEnv *env, jint capacity)) JNIWrapper("EnsureLocalCapacity"); DTRACE_PROBE2(hotspot_jni, EnsureLocalCapacity__entry, env, capacity); jint ret; if (capacity >= 0 && capacity <= MAX_REASONABLE_LOCAL_CAPACITY) { ret = JNI_OK; } else { ret = JNI_ERR; } DTRACE_PROBE1(hotspot_jni, EnsureLocalCapacity__return, ret); return ret; JNI_END // Return the Handle Type JNI_LEAF(jobjectRefType, jni_GetObjectRefType(JNIEnv *env, jobject obj)) JNIWrapper("GetObjectRefType"); DTRACE_PROBE2(hotspot_jni, GetObjectRefType__entry, env, obj); jobjectRefType ret; if (JNIHandles::is_local_handle(thread, obj) || JNIHandles::is_frame_handle(thread, obj)) ret = JNILocalRefType; else if (JNIHandles::is_global_handle(obj)) ret = JNIGlobalRefType; else if (JNIHandles::is_weak_global_handle(obj)) ret = JNIWeakGlobalRefType; else ret = JNIInvalidRefType; DTRACE_PROBE1(hotspot_jni, GetObjectRefType__return, ret); return ret; JNI_END class JNI_ArgumentPusher : public SignatureIterator { protected: JavaCallArguments* _arguments; virtual void get_bool () = 0; virtual void get_char () = 0; virtual void get_short () = 0; virtual void get_byte () = 0; virtual void get_int () = 0; virtual void get_long () = 0; virtual void get_float () = 0; virtual void get_double () = 0; virtual void get_object () = 0; JNI_ArgumentPusher(Symbol* signature) : SignatureIterator(signature) { this->_return_type = T_ILLEGAL; _arguments = NULL; } public: virtual void iterate( uint64_t fingerprint ) = 0; void set_java_argument_object(JavaCallArguments *arguments) { _arguments = arguments; } inline void do_bool() { if (!is_return_type()) get_bool(); } inline void do_char() { if (!is_return_type()) get_char(); } inline void do_short() { if (!is_return_type()) get_short(); } inline void do_byte() { if (!is_return_type()) get_byte(); } inline void do_int() { if (!is_return_type()) get_int(); } inline void do_long() { if (!is_return_type()) get_long(); } inline void do_float() { if (!is_return_type()) get_float(); } inline void do_double() { if (!is_return_type()) get_double(); } inline void do_object(int begin, int end) { if (!is_return_type()) get_object(); } inline void do_array(int begin, int end) { if (!is_return_type()) get_object(); } // do_array uses get_object -- there is no get_array inline void do_void() { } JavaCallArguments* arguments() { return _arguments; } void push_receiver(Handle h) { _arguments->push_oop(h); } }; class JNI_ArgumentPusherVaArg : public JNI_ArgumentPusher { protected: va_list _ap; inline void get_bool() { _arguments->push_int(va_arg(_ap, jint)); } // bool is coerced to int when using va_arg inline void get_char() { _arguments->push_int(va_arg(_ap, jint)); } // char is coerced to int when using va_arg inline void get_short() { _arguments->push_int(va_arg(_ap, jint)); } // short is coerced to int when using va_arg inline void get_byte() { _arguments->push_int(va_arg(_ap, jint)); } // byte is coerced to int when using va_arg inline void get_int() { _arguments->push_int(va_arg(_ap, jint)); } // each of these paths is exercized by the various jck Call[Static,Nonvirtual,][Void,Int,..]Method[A,V,] tests inline void get_long() { _arguments->push_long(va_arg(_ap, jlong)); } inline void get_float() { _arguments->push_float((jfloat)va_arg(_ap, jdouble)); } // float is coerced to double w/ va_arg inline void get_double() { _arguments->push_double(va_arg(_ap, jdouble)); } inline void get_object() { jobject l = va_arg(_ap, jobject); _arguments->push_oop(Handle((oop *)l, false)); } inline void set_ap(va_list rap) { #ifdef va_copy va_copy(_ap, rap); #elif defined (__va_copy) __va_copy(_ap, rap); #else _ap = rap; #endif } public: JNI_ArgumentPusherVaArg(Symbol* signature, va_list rap) : JNI_ArgumentPusher(signature) { set_ap(rap); } JNI_ArgumentPusherVaArg(jmethodID method_id, va_list rap) : JNI_ArgumentPusher(JNIHandles::resolve_jmethod_id(method_id)->signature()) { set_ap(rap); } // Optimized path if we have the bitvector form of signature void iterate( uint64_t fingerprint ) { if ( fingerprint == UCONST64(-1) ) SignatureIterator::iterate();// Must be too many arguments else { _return_type = (BasicType)((fingerprint >> static_feature_size) & result_feature_mask); assert(fingerprint, "Fingerprint should not be 0"); fingerprint = fingerprint >> (static_feature_size + result_feature_size); while ( 1 ) { switch ( fingerprint & parameter_feature_mask ) { case bool_parm: case char_parm: case short_parm: case byte_parm: case int_parm: get_int(); break; case obj_parm: get_object(); break; case long_parm: get_long(); break; case float_parm: get_float(); break; case double_parm: get_double(); break; case done_parm: return; break; default: ShouldNotReachHere(); break; } fingerprint >>= parameter_feature_size; } } } }; class JNI_ArgumentPusherArray : public JNI_ArgumentPusher { protected: const jvalue *_ap; inline void get_bool() { _arguments->push_int((jint)(_ap++)->z); } inline void get_char() { _arguments->push_int((jint)(_ap++)->c); } inline void get_short() { _arguments->push_int((jint)(_ap++)->s); } inline void get_byte() { _arguments->push_int((jint)(_ap++)->b); } inline void get_int() { _arguments->push_int((jint)(_ap++)->i); } inline void get_long() { _arguments->push_long((_ap++)->j); } inline void get_float() { _arguments->push_float((_ap++)->f); } inline void get_double() { _arguments->push_double((_ap++)->d);} inline void get_object() { _arguments->push_oop(Handle((oop *)(_ap++)->l, false)); } inline void set_ap(const jvalue *rap) { _ap = rap; } public: JNI_ArgumentPusherArray(Symbol* signature, const jvalue *rap) : JNI_ArgumentPusher(signature) { set_ap(rap); } JNI_ArgumentPusherArray(jmethodID method_id, const jvalue *rap) : JNI_ArgumentPusher(JNIHandles::resolve_jmethod_id(method_id)->signature()) { set_ap(rap); } // Optimized path if we have the bitvector form of signature void iterate( uint64_t fingerprint ) { if ( fingerprint == UCONST64(-1) ) SignatureIterator::iterate(); // Must be too many arguments else { _return_type = (BasicType)((fingerprint >> static_feature_size) & result_feature_mask); assert(fingerprint, "Fingerprint should not be 0"); fingerprint = fingerprint >> (static_feature_size + result_feature_size); while ( 1 ) { switch ( fingerprint & parameter_feature_mask ) { case bool_parm: get_bool(); break; case char_parm: get_char(); break; case short_parm: get_short(); break; case byte_parm: get_byte(); break; case int_parm: get_int(); break; case obj_parm: get_object(); break; case long_parm: get_long(); break; case float_parm: get_float(); break; case double_parm: get_double(); break; case done_parm: return; break; default: ShouldNotReachHere(); break; } fingerprint >>= parameter_feature_size; } } } }; enum JNICallType { JNI_STATIC, JNI_VIRTUAL, JNI_NONVIRTUAL }; static methodHandle jni_resolve_interface_call(Handle recv, methodHandle method, TRAPS) { assert(!method.is_null() , "method should not be null"); KlassHandle recv_klass; // Default to NULL (use of ?: can confuse gcc) if (recv.not_null()) recv_klass = KlassHandle(THREAD, recv->klass()); KlassHandle spec_klass (THREAD, method->method_holder()); Symbol* name = method->name(); Symbol* signature = method->signature(); CallInfo info; LinkResolver::resolve_interface_call(info, recv, recv_klass, spec_klass, name, signature, KlassHandle(), false, true, CHECK_(methodHandle())); return info.selected_method(); } static methodHandle jni_resolve_virtual_call(Handle recv, methodHandle method, TRAPS) { assert(!method.is_null() , "method should not be null"); KlassHandle recv_klass; // Default to NULL (use of ?: can confuse gcc) if (recv.not_null()) recv_klass = KlassHandle(THREAD, recv->klass()); KlassHandle spec_klass (THREAD, method->method_holder()); Symbol* name = method->name(); Symbol* signature = method->signature(); CallInfo info; LinkResolver::resolve_virtual_call(info, recv, recv_klass, spec_klass, name, signature, KlassHandle(), false, true, CHECK_(methodHandle())); return info.selected_method(); } static void jni_invoke_static(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { methodHandle method(THREAD, JNIHandles::resolve_jmethod_id(method_id)); // Create object to hold arguments for the JavaCall, and associate it with // the jni parser ResourceMark rm(THREAD); int number_of_parameters = method->size_of_parameters(); JavaCallArguments java_args(number_of_parameters); args->set_java_argument_object(&java_args); assert(method->is_static(), "method should be static"); // Fill out JavaCallArguments object args->iterate( Fingerprinter(method).fingerprint() ); // Initialize result type result->set_type(args->get_ret_type()); // Invoke the method. Result is returned as oop. JavaCalls::call(result, method, &java_args, CHECK); // Convert result if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); } } static void jni_invoke_nonstatic(JNIEnv *env, JavaValue* result, jobject receiver, JNICallType call_type, jmethodID method_id, JNI_ArgumentPusher *args, TRAPS) { oop recv = JNIHandles::resolve(receiver); if (recv == NULL) { THROW(vmSymbols::java_lang_NullPointerException()); } Handle h_recv(THREAD, recv); int number_of_parameters; methodOop selected_method; { methodOop m = JNIHandles::resolve_jmethod_id(method_id); number_of_parameters = m->size_of_parameters(); klassOop holder = m->method_holder(); if (!(Klass::cast(holder))->is_interface()) { // non-interface call -- for that little speed boost, don't handlize debug_only(No_Safepoint_Verifier nosafepoint;) if (call_type == JNI_VIRTUAL) { // jni_GetMethodID makes sure class is linked and initialized // so m should have a valid vtable index. int vtbl_index = m->vtable_index(); if (vtbl_index != methodOopDesc::nonvirtual_vtable_index) { klassOop k = h_recv->klass(); // k might be an arrayKlassOop but all vtables start at // the same place. The cast is to avoid virtual call and assertion. instanceKlass *ik = (instanceKlass*)k->klass_part(); selected_method = ik->method_at_vtable(vtbl_index); } else { // final method selected_method = m; } } else { // JNI_NONVIRTUAL call selected_method = m; } } else { // interface call KlassHandle h_holder(THREAD, holder); int itbl_index = m->cached_itable_index(); if (itbl_index == -1) { itbl_index = klassItable::compute_itable_index(m); m->set_cached_itable_index(itbl_index); // the above may have grabbed a lock, 'm' and anything non-handlized can't be used again } klassOop k = h_recv->klass(); selected_method = instanceKlass::cast(k)->method_at_itable(h_holder(), itbl_index, CHECK); } } methodHandle method(THREAD, selected_method); // Create object to hold arguments for the JavaCall, and associate it with // the jni parser ResourceMark rm(THREAD); JavaCallArguments java_args(number_of_parameters); args->set_java_argument_object(&java_args); // handle arguments assert(!method->is_static(), "method should not be static"); args->push_receiver(h_recv); // Push jobject handle // Fill out JavaCallArguments object args->iterate( Fingerprinter(method).fingerprint() ); // Initialize result type result->set_type(args->get_ret_type()); // Invoke the method. Result is returned as oop. JavaCalls::call(result, method, &java_args, CHECK); // Convert result if (result->get_type() == T_OBJECT || result->get_type() == T_ARRAY) { result->set_jobject(JNIHandles::make_local(env, (oop) result->get_jobject())); } } static instanceOop alloc_object(jclass clazz, TRAPS) { KlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); Klass::cast(k())->check_valid_for_instantiation(false, CHECK_NULL); instanceKlass::cast(k())->initialize(CHECK_NULL); instanceOop ih = instanceKlass::cast(k())->allocate_instance(THREAD); return ih; } DT_RETURN_MARK_DECL(AllocObject, jobject); JNI_ENTRY(jobject, jni_AllocObject(JNIEnv *env, jclass clazz)) JNIWrapper("AllocObject"); DTRACE_PROBE2(hotspot_jni, AllocObject__entry, env, clazz); jobject ret = NULL; DT_RETURN_MARK(AllocObject, jobject, (const jobject&)ret); instanceOop i = alloc_object(clazz, CHECK_NULL); ret = JNIHandles::make_local(env, i); return ret; JNI_END DT_RETURN_MARK_DECL(NewObjectA, jobject); JNI_ENTRY(jobject, jni_NewObjectA(JNIEnv *env, jclass clazz, jmethodID methodID, const jvalue *args)) JNIWrapper("NewObjectA"); DTRACE_PROBE3(hotspot_jni, NewObjectA__entry, env, clazz, methodID); jobject obj = NULL; DT_RETURN_MARK(NewObjectA, jobject, (const jobject)obj); instanceOop i = alloc_object(clazz, CHECK_NULL); obj = JNIHandles::make_local(env, i); JavaValue jvalue(T_VOID); JNI_ArgumentPusherArray ap(methodID, args); jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); return obj; JNI_END DT_RETURN_MARK_DECL(NewObjectV, jobject); JNI_ENTRY(jobject, jni_NewObjectV(JNIEnv *env, jclass clazz, jmethodID methodID, va_list args)) JNIWrapper("NewObjectV"); DTRACE_PROBE3(hotspot_jni, NewObjectV__entry, env, clazz, methodID); jobject obj = NULL; DT_RETURN_MARK(NewObjectV, jobject, (const jobject&)obj); instanceOop i = alloc_object(clazz, CHECK_NULL); obj = JNIHandles::make_local(env, i); JavaValue jvalue(T_VOID); JNI_ArgumentPusherVaArg ap(methodID, args); jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); return obj; JNI_END DT_RETURN_MARK_DECL(NewObject, jobject); JNI_ENTRY(jobject, jni_NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ...)) JNIWrapper("NewObject"); DTRACE_PROBE3(hotspot_jni, NewObject__entry, env, clazz, methodID); jobject obj = NULL; DT_RETURN_MARK(NewObject, jobject, (const jobject&)obj); instanceOop i = alloc_object(clazz, CHECK_NULL); obj = JNIHandles::make_local(env, i); va_list args; va_start(args, methodID); JavaValue jvalue(T_VOID); JNI_ArgumentPusherVaArg ap(methodID, args); jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_NULL); va_end(args); return obj; JNI_END JNI_ENTRY(jclass, jni_GetObjectClass(JNIEnv *env, jobject obj)) JNIWrapper("GetObjectClass"); DTRACE_PROBE2(hotspot_jni, GetObjectClass__entry, env, obj); klassOop k = JNIHandles::resolve_non_null(obj)->klass(); jclass ret = (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); DTRACE_PROBE1(hotspot_jni, GetObjectClass__return, ret); return ret; JNI_END JNI_QUICK_ENTRY(jboolean, jni_IsInstanceOf(JNIEnv *env, jobject obj, jclass clazz)) JNIWrapper("IsInstanceOf"); DTRACE_PROBE3(hotspot_jni, IsInstanceOf__entry, env, obj, clazz); jboolean ret = JNI_TRUE; if (obj != NULL) { ret = JNI_FALSE; klassOop k = java_lang_Class::as_klassOop( JNIHandles::resolve_non_null(clazz)); if (k != NULL) { ret = JNIHandles::resolve_non_null(obj)->is_a(k) ? JNI_TRUE : JNI_FALSE; } } DTRACE_PROBE1(hotspot_jni, IsInstanceOf__return, ret); return ret; JNI_END static jmethodID get_method_id(JNIEnv *env, jclass clazz, const char *name_str, const char *sig, bool is_static, TRAPS) { // %%%% This code should probably just call into a method in the LinkResolver // // The class should have been loaded (we have an instance of the class // passed in) so the method and signature should already be in the symbol // table. If they're not there, the method doesn't exist. const char *name_to_probe = (name_str == NULL) ? vmSymbols::object_initializer_name()->as_C_string() : name_str; TempNewSymbol name = SymbolTable::probe(name_to_probe, (int)strlen(name_to_probe)); TempNewSymbol signature = SymbolTable::probe(sig, (int)strlen(sig)); if (name == NULL || signature == NULL) { THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); } // Throw a NoSuchMethodError exception if we have an instance of a // primitive java.lang.Class if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(clazz))) { THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); } KlassHandle klass(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); // Make sure class is linked and initialized before handing id's out to // methodOops. Klass::cast(klass())->initialize(CHECK_NULL); methodOop m; if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) { // Never search superclasses for constructors if (klass->oop_is_instance()) { m = instanceKlass::cast(klass())->find_method(name, signature); } else { m = NULL; } } else { m = klass->lookup_method(name, signature); // Look up interfaces if (m == NULL && klass->oop_is_instance()) { m = instanceKlass::cast(klass())->lookup_method_in_all_interfaces(name, signature); } } if (m == NULL || (m->is_static() != is_static)) { THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), name_str); } return m->jmethod_id(); } JNI_ENTRY(jmethodID, jni_GetMethodID(JNIEnv *env, jclass clazz, const char *name, const char *sig)) JNIWrapper("GetMethodID"); DTRACE_PROBE4(hotspot_jni, GetMethodID__entry, env, clazz, name, sig); jmethodID ret = get_method_id(env, clazz, name, sig, false, thread); DTRACE_PROBE1(hotspot_jni, GetMethodID__return, ret); return ret; JNI_END JNI_ENTRY(jmethodID, jni_GetStaticMethodID(JNIEnv *env, jclass clazz, const char *name, const char *sig)) JNIWrapper("GetStaticMethodID"); DTRACE_PROBE4(hotspot_jni, GetStaticMethodID__entry, env, clazz, name, sig); jmethodID ret = get_method_id(env, clazz, name, sig, true, thread); DTRACE_PROBE1(hotspot_jni, GetStaticMethodID__return, ret); return ret; JNI_END // // Calling Methods // #define DEFINE_CALLMETHOD(ResultType, Result, Tag) \ \ DT_RETURN_MARK_DECL_FOR(Result, Call##Result##Method, ResultType);\ DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodV, ResultType);\ DT_RETURN_MARK_DECL_FOR(Result, Call##Result##MethodA, ResultType);\ \ JNI_ENTRY(ResultType, \ jni_Call##Result##Method(JNIEnv *env, jobject obj, jmethodID methodID, ...)) \ JNIWrapper("Call" XSTR(Result) "Method"); \ \ DTRACE_PROBE3(hotspot_jni, Call##Result##Method__entry, env, obj, methodID);\ ResultType ret = 0;\ DT_RETURN_MARK_FOR(Result, Call##Result##Method, ResultType, \ (const ResultType&)ret);\ \ va_list args; \ va_start(args, methodID); \ JavaValue jvalue(Tag); \ JNI_ArgumentPusherVaArg ap(methodID, args); \ jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ va_end(args); \ ret = jvalue.get_##ResultType(); \ return ret;\ JNI_END \ \ \ JNI_ENTRY(ResultType, \ jni_Call##Result##MethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) \ JNIWrapper("Call" XSTR(Result) "MethodV"); \ \ DTRACE_PROBE3(hotspot_jni, Call##Result##MethodV__entry, env, obj, methodID);\ ResultType ret = 0;\ DT_RETURN_MARK_FOR(Result, Call##Result##MethodV, ResultType, \ (const ResultType&)ret);\ \ JavaValue jvalue(Tag); \ JNI_ArgumentPusherVaArg ap(methodID, args); \ jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ ret = jvalue.get_##ResultType(); \ return ret;\ JNI_END \ \ \ JNI_ENTRY(ResultType, \ jni_Call##Result##MethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) \ JNIWrapper("Call" XSTR(Result) "MethodA"); \ DTRACE_PROBE3(hotspot_jni, Call##Result##MethodA__entry, env, obj, methodID);\ ResultType ret = 0;\ DT_RETURN_MARK_FOR(Result, Call##Result##MethodA, ResultType, \ (const ResultType&)ret);\ \ JavaValue jvalue(Tag); \ JNI_ArgumentPusherArray ap(methodID, args); \ jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK_0); \ ret = jvalue.get_##ResultType(); \ return ret;\ JNI_END // the runtime type of subword integral basic types is integer DEFINE_CALLMETHOD(jboolean, Boolean, T_BOOLEAN) DEFINE_CALLMETHOD(jbyte, Byte, T_BYTE) DEFINE_CALLMETHOD(jchar, Char, T_CHAR) DEFINE_CALLMETHOD(jshort, Short, T_SHORT) DEFINE_CALLMETHOD(jobject, Object, T_OBJECT) DEFINE_CALLMETHOD(jint, Int, T_INT) DEFINE_CALLMETHOD(jlong, Long, T_LONG) DEFINE_CALLMETHOD(jfloat, Float, T_FLOAT) DEFINE_CALLMETHOD(jdouble, Double, T_DOUBLE) DT_VOID_RETURN_MARK_DECL(CallVoidMethod); DT_VOID_RETURN_MARK_DECL(CallVoidMethodV); DT_VOID_RETURN_MARK_DECL(CallVoidMethodA); JNI_ENTRY(void, jni_CallVoidMethod(JNIEnv *env, jobject obj, jmethodID methodID, ...)) JNIWrapper("CallVoidMethod"); DTRACE_PROBE3(hotspot_jni, CallVoidMethod__entry, env, obj, methodID); DT_VOID_RETURN_MARK(CallVoidMethod); va_list args; va_start(args, methodID); JavaValue jvalue(T_VOID); JNI_ArgumentPusherVaArg ap(methodID, args); jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); va_end(args); JNI_END JNI_ENTRY(void, jni_CallVoidMethodV(JNIEnv *env, jobject obj, jmethodID methodID, va_list args)) JNIWrapper("CallVoidMethodV"); DTRACE_PROBE3(hotspot_jni, CallVoidMethodV__entry, env, obj, methodID); DT_VOID_RETURN_MARK(CallVoidMethodV); JavaValue jvalue(T_VOID); JNI_ArgumentPusherVaArg ap(methodID, args); jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); JNI_END JNI_ENTRY(void, jni_CallVoidMethodA(JNIEnv *env, jobject obj, jmethodID methodID, const jvalue *args)) JNIWrapper("CallVoidMethodA"); DTRACE_PROBE3(hotspot_jni, CallVoidMethodA__entry, env, obj, methodID); DT_VOID_RETURN_MARK(CallVoidMethodA); JavaValue jvalue(T_VOID); JNI_ArgumentPusherArray ap(methodID, args); jni_invoke_nonstatic(env, &jvalue, obj, JNI_VIRTUAL, methodID, &ap, CHECK); JNI_END #define DEFINE_CALLNONVIRTUALMETHOD(ResultType, Result, Tag) \ \ DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##Method, ResultType);\ DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodV, ResultType);\ DT_RETURN_MARK_DECL_FOR(Result, CallNonvirtual##Result##MethodA, ResultType);\ \ JNI_ENTRY(ResultType, \ jni_CallNonvirtual##Result##Method(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) \ JNIWrapper("CallNonvitual" XSTR(Result) "Method"); \ \ DTRACE_PROBE4(hotspot_jni, CallNonvirtual##Result##Method__entry, env, obj, cls, methodID);\ ResultType ret;\ DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##Method, ResultType, \ (const ResultType&)ret);\ \ va_list args; \ va_start(args, methodID); \ JavaValue jvalue(Tag); \ JNI_ArgumentPusherVaArg ap(methodID, args); \ jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ va_end(args); \ ret = jvalue.get_##ResultType(); \ return ret;\ JNI_END \ \ JNI_ENTRY(ResultType, \ jni_CallNonvirtual##Result##MethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) \ JNIWrapper("CallNonvitual" XSTR(Result) "#MethodV"); \ DTRACE_PROBE4(hotspot_jni, CallNonvirtual##Result##MethodV__entry, env, obj, cls, methodID);\ ResultType ret;\ DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodV, ResultType, \ (const ResultType&)ret);\ \ JavaValue jvalue(Tag); \ JNI_ArgumentPusherVaArg ap(methodID, args); \ jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ ret = jvalue.get_##ResultType(); \ return ret;\ JNI_END \ \ JNI_ENTRY(ResultType, \ jni_CallNonvirtual##Result##MethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) \ JNIWrapper("CallNonvitual" XSTR(Result) "MethodA"); \ DTRACE_PROBE4(hotspot_jni, CallNonvirtual##Result##MethodA__entry, env, obj, cls, methodID);\ ResultType ret;\ DT_RETURN_MARK_FOR(Result, CallNonvirtual##Result##MethodA, ResultType, \ (const ResultType&)ret);\ \ JavaValue jvalue(Tag); \ JNI_ArgumentPusherArray ap(methodID, args); \ jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK_0); \ ret = jvalue.get_##ResultType(); \ return ret;\ JNI_END // the runtime type of subword integral basic types is integer DEFINE_CALLNONVIRTUALMETHOD(jboolean, Boolean, T_BOOLEAN) DEFINE_CALLNONVIRTUALMETHOD(jbyte, Byte, T_BYTE) DEFINE_CALLNONVIRTUALMETHOD(jchar, Char, T_CHAR) DEFINE_CALLNONVIRTUALMETHOD(jshort, Short, T_SHORT) DEFINE_CALLNONVIRTUALMETHOD(jobject, Object, T_OBJECT) DEFINE_CALLNONVIRTUALMETHOD(jint, Int, T_INT) DEFINE_CALLNONVIRTUALMETHOD(jlong, Long, T_LONG) DEFINE_CALLNONVIRTUALMETHOD(jfloat, Float, T_FLOAT) DEFINE_CALLNONVIRTUALMETHOD(jdouble, Double, T_DOUBLE) DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethod); DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodV); DT_VOID_RETURN_MARK_DECL(CallNonvirtualVoidMethodA); JNI_ENTRY(void, jni_CallNonvirtualVoidMethod(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, ...)) JNIWrapper("CallNonvirtualVoidMethod"); DTRACE_PROBE4(hotspot_jni, CallNonvirtualVoidMethod__entry, env, obj, cls, methodID); DT_VOID_RETURN_MARK(CallNonvirtualVoidMethod); va_list args; va_start(args, methodID); JavaValue jvalue(T_VOID); JNI_ArgumentPusherVaArg ap(methodID, args); jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); va_end(args); JNI_END JNI_ENTRY(void, jni_CallNonvirtualVoidMethodV(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, va_list args)) JNIWrapper("CallNonvirtualVoidMethodV"); DTRACE_PROBE4(hotspot_jni, CallNonvirtualVoidMethodV__entry, env, obj, cls, methodID); DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodV); JavaValue jvalue(T_VOID); JNI_ArgumentPusherVaArg ap(methodID, args); jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); JNI_END JNI_ENTRY(void, jni_CallNonvirtualVoidMethodA(JNIEnv *env, jobject obj, jclass cls, jmethodID methodID, const jvalue *args)) JNIWrapper("CallNonvirtualVoidMethodA"); DTRACE_PROBE4(hotspot_jni, CallNonvirtualVoidMethodA__entry, env, obj, cls, methodID); DT_VOID_RETURN_MARK(CallNonvirtualVoidMethodA); JavaValue jvalue(T_VOID); JNI_ArgumentPusherArray ap(methodID, args); jni_invoke_nonstatic(env, &jvalue, obj, JNI_NONVIRTUAL, methodID, &ap, CHECK); JNI_END #define DEFINE_CALLSTATICMETHOD(ResultType, Result, Tag) \ \ DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##Method, ResultType);\ DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodV, ResultType);\ DT_RETURN_MARK_DECL_FOR(Result, CallStatic##Result##MethodA, ResultType);\ \ JNI_ENTRY(ResultType, \ jni_CallStatic##Result##Method(JNIEnv *env, jclass cls, jmethodID methodID, ...)) \ JNIWrapper("CallStatic" XSTR(Result) "Method"); \ \ DTRACE_PROBE3(hotspot_jni, CallStatic##Result##Method__entry, env, cls, methodID);\ ResultType ret = 0;\ DT_RETURN_MARK_FOR(Result, CallStatic##Result##Method, ResultType, \ (const ResultType&)ret);\ \ va_list args; \ va_start(args, methodID); \ JavaValue jvalue(Tag); \ JNI_ArgumentPusherVaArg ap(methodID, args); \ jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ va_end(args); \ ret = jvalue.get_##ResultType(); \ return ret;\ JNI_END \ \ JNI_ENTRY(ResultType, \ jni_CallStatic##Result##MethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) \ JNIWrapper("CallStatic" XSTR(Result) "MethodV"); \ DTRACE_PROBE3(hotspot_jni, CallStatic##Result##MethodV__entry, env, cls, methodID);\ ResultType ret = 0;\ DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodV, ResultType, \ (const ResultType&)ret);\ \ JavaValue jvalue(Tag); \ JNI_ArgumentPusherVaArg ap(methodID, args); \ jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ ret = jvalue.get_##ResultType(); \ return ret;\ JNI_END \ \ JNI_ENTRY(ResultType, \ jni_CallStatic##Result##MethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) \ JNIWrapper("CallStatic" XSTR(Result) "MethodA"); \ DTRACE_PROBE3(hotspot_jni, CallStatic##Result##MethodA__entry, env, cls, methodID);\ ResultType ret = 0;\ DT_RETURN_MARK_FOR(Result, CallStatic##Result##MethodA, ResultType, \ (const ResultType&)ret);\ \ JavaValue jvalue(Tag); \ JNI_ArgumentPusherArray ap(methodID, args); \ jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK_0); \ ret = jvalue.get_##ResultType(); \ return ret;\ JNI_END // the runtime type of subword integral basic types is integer DEFINE_CALLSTATICMETHOD(jboolean, Boolean, T_BOOLEAN) DEFINE_CALLSTATICMETHOD(jbyte, Byte, T_BYTE) DEFINE_CALLSTATICMETHOD(jchar, Char, T_CHAR) DEFINE_CALLSTATICMETHOD(jshort, Short, T_SHORT) DEFINE_CALLSTATICMETHOD(jobject, Object, T_OBJECT) DEFINE_CALLSTATICMETHOD(jint, Int, T_INT) DEFINE_CALLSTATICMETHOD(jlong, Long, T_LONG) DEFINE_CALLSTATICMETHOD(jfloat, Float, T_FLOAT) DEFINE_CALLSTATICMETHOD(jdouble, Double, T_DOUBLE) DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethod); DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodV); DT_VOID_RETURN_MARK_DECL(CallStaticVoidMethodA); JNI_ENTRY(void, jni_CallStaticVoidMethod(JNIEnv *env, jclass cls, jmethodID methodID, ...)) JNIWrapper("CallStaticVoidMethod"); DTRACE_PROBE3(hotspot_jni, CallStaticVoidMethod__entry, env, cls, methodID); DT_VOID_RETURN_MARK(CallStaticVoidMethod); va_list args; va_start(args, methodID); JavaValue jvalue(T_VOID); JNI_ArgumentPusherVaArg ap(methodID, args); jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); va_end(args); JNI_END JNI_ENTRY(void, jni_CallStaticVoidMethodV(JNIEnv *env, jclass cls, jmethodID methodID, va_list args)) JNIWrapper("CallStaticVoidMethodV"); DTRACE_PROBE3(hotspot_jni, CallStaticVoidMethodV__entry, env, cls, methodID); DT_VOID_RETURN_MARK(CallStaticVoidMethodV); JavaValue jvalue(T_VOID); JNI_ArgumentPusherVaArg ap(methodID, args); jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); JNI_END JNI_ENTRY(void, jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID methodID, const jvalue *args)) JNIWrapper("CallStaticVoidMethodA"); DTRACE_PROBE3(hotspot_jni, CallStaticVoidMethodA__entry, env, cls, methodID); DT_VOID_RETURN_MARK(CallStaticVoidMethodA); JavaValue jvalue(T_VOID); JNI_ArgumentPusherArray ap(methodID, args); jni_invoke_static(env, &jvalue, NULL, JNI_STATIC, methodID, &ap, CHECK); JNI_END // // Accessing Fields // DT_RETURN_MARK_DECL(GetFieldID, jfieldID); JNI_ENTRY(jfieldID, jni_GetFieldID(JNIEnv *env, jclass clazz, const char *name, const char *sig)) JNIWrapper("GetFieldID"); DTRACE_PROBE4(hotspot_jni, GetFieldID__entry, env, clazz, name, sig); jfieldID ret = 0; DT_RETURN_MARK(GetFieldID, jfieldID, (const jfieldID&)ret); // The class should have been loaded (we have an instance of the class // passed in) so the field and signature should already be in the symbol // table. If they're not there, the field doesn't exist. TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); if (fieldname == NULL || signame == NULL) { THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); } KlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); // Make sure class is initialized before handing id's out to fields Klass::cast(k())->initialize(CHECK_NULL); fieldDescriptor fd; if (!Klass::cast(k())->oop_is_instance() || !instanceKlass::cast(k())->find_field(fieldname, signame, false, &fd)) { THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); } // A jfieldID for a non-static field is simply the offset of the field within the instanceOop // It may also have hash bits for k, if VerifyJNIFields is turned on. ret = jfieldIDWorkaround::to_instance_jfieldID(k(), fd.offset()); return ret; JNI_END JNI_ENTRY(jobject, jni_GetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID)) JNIWrapper("GetObjectField"); DTRACE_PROBE3(hotspot_jni, GetObjectField__entry, env, obj, fieldID); oop o = JNIHandles::resolve_non_null(obj); klassOop k = o->klass(); int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); // Keep JVMTI addition small and only check enabled flag here. // jni_GetField_probe() assumes that is okay to create handles. if (JvmtiExport::should_post_field_access()) { o = JvmtiExport::jni_GetField_probe(thread, obj, o, k, fieldID, false); } jobject ret = JNIHandles::make_local(env, o->obj_field(offset)); DTRACE_PROBE1(hotspot_jni, GetObjectField__return, ret); return ret; JNI_END #define DEFINE_GETFIELD(Return,Fieldname,Result) \ \ DT_RETURN_MARK_DECL_FOR(Result, Get##Result##Field, Return);\ \ JNI_QUICK_ENTRY(Return, jni_Get##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID)) \ JNIWrapper("Get" XSTR(Result) "Field"); \ \ DTRACE_PROBE3(hotspot_jni, Get##Result##Field__entry, env, obj, fieldID);\ Return ret = 0;\ DT_RETURN_MARK_FOR(Result, Get##Result##Field, Return, (const Return&)ret);\ \ oop o = JNIHandles::resolve_non_null(obj); \ klassOop k = o->klass(); \ int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ /* Keep JVMTI addition small and only check enabled flag here. */ \ /* jni_GetField_probe_nh() assumes that is not okay to create handles */ \ /* and creates a ResetNoHandleMark. */ \ if (JvmtiExport::should_post_field_access()) { \ o = JvmtiExport::jni_GetField_probe_nh(thread, obj, o, k, fieldID, false); \ } \ ret = o->Fieldname##_field(offset); \ return ret; \ JNI_END DEFINE_GETFIELD(jboolean, bool, Boolean) DEFINE_GETFIELD(jbyte, byte, Byte) DEFINE_GETFIELD(jchar, char, Char) DEFINE_GETFIELD(jshort, short, Short) DEFINE_GETFIELD(jint, int, Int) DEFINE_GETFIELD(jlong, long, Long) DEFINE_GETFIELD(jfloat, float, Float) DEFINE_GETFIELD(jdouble, double, Double) address jni_GetBooleanField_addr() { return (address)jni_GetBooleanField; } address jni_GetByteField_addr() { return (address)jni_GetByteField; } address jni_GetCharField_addr() { return (address)jni_GetCharField; } address jni_GetShortField_addr() { return (address)jni_GetShortField; } address jni_GetIntField_addr() { return (address)jni_GetIntField; } address jni_GetLongField_addr() { return (address)jni_GetLongField; } address jni_GetFloatField_addr() { return (address)jni_GetFloatField; } address jni_GetDoubleField_addr() { return (address)jni_GetDoubleField; } JNI_QUICK_ENTRY(void, jni_SetObjectField(JNIEnv *env, jobject obj, jfieldID fieldID, jobject value)) JNIWrapper("SetObjectField"); DTRACE_PROBE4(hotspot_jni, SetObjectField__entry, env, obj, fieldID, value); oop o = JNIHandles::resolve_non_null(obj); klassOop k = o->klass(); int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); // Keep JVMTI addition small and only check enabled flag here. // jni_SetField_probe_nh() assumes that is not okay to create handles // and creates a ResetNoHandleMark. if (JvmtiExport::should_post_field_modification()) { jvalue field_value; field_value.l = value; o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, 'L', (jvalue *)&field_value); } o->obj_field_put(offset, JNIHandles::resolve(value)); DTRACE_PROBE(hotspot_jni, SetObjectField__return); JNI_END #define DEFINE_SETFIELD(Argument,Fieldname,Result,SigType,unionType) \ \ JNI_QUICK_ENTRY(void, jni_Set##Result##Field(JNIEnv *env, jobject obj, jfieldID fieldID, Argument value)) \ JNIWrapper("Set" XSTR(Result) "Field"); \ \ HS_DTRACE_PROBE_CDECL_N(hotspot_jni, Set##Result##Field__entry, \ ( JNIEnv*, jobject, jfieldID FP_SELECT_##Result(COMMA Argument,/*empty*/) ) ); \ HS_DTRACE_PROBE_N(hotspot_jni, Set##Result##Field__entry, \ ( env, obj, fieldID FP_SELECT_##Result(COMMA value,/*empty*/) ) ); \ \ oop o = JNIHandles::resolve_non_null(obj); \ klassOop k = o->klass(); \ int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); \ /* Keep JVMTI addition small and only check enabled flag here. */ \ /* jni_SetField_probe_nh() assumes that is not okay to create handles */ \ /* and creates a ResetNoHandleMark. */ \ if (JvmtiExport::should_post_field_modification()) { \ jvalue field_value; \ field_value.unionType = value; \ o = JvmtiExport::jni_SetField_probe_nh(thread, obj, o, k, fieldID, false, SigType, (jvalue *)&field_value); \ } \ o->Fieldname##_field_put(offset, value); \ DTRACE_PROBE(hotspot_jni, Set##Result##Field__return);\ JNI_END DEFINE_SETFIELD(jboolean, bool, Boolean, 'Z', z) DEFINE_SETFIELD(jbyte, byte, Byte, 'B', b) DEFINE_SETFIELD(jchar, char, Char, 'C', c) DEFINE_SETFIELD(jshort, short, Short, 'S', s) DEFINE_SETFIELD(jint, int, Int, 'I', i) DEFINE_SETFIELD(jlong, long, Long, 'J', j) DEFINE_SETFIELD(jfloat, float, Float, 'F', f) DEFINE_SETFIELD(jdouble, double, Double, 'D', d) DT_RETURN_MARK_DECL(ToReflectedField, jobject); JNI_ENTRY(jobject, jni_ToReflectedField(JNIEnv *env, jclass cls, jfieldID fieldID, jboolean isStatic)) JNIWrapper("ToReflectedField"); DTRACE_PROBE4(hotspot_jni, ToReflectedField__entry, env, cls, fieldID, isStatic); jobject ret = NULL; DT_RETURN_MARK(ToReflectedField, jobject, (const jobject&)ret); fieldDescriptor fd; bool found = false; klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); assert(jfieldIDWorkaround::is_static_jfieldID(fieldID) == (isStatic != 0), "invalid fieldID"); if (isStatic) { // Static field. The fieldID a JNIid specifying the field holder and the offset within the klassOop. JNIid* id = jfieldIDWorkaround::from_static_jfieldID(fieldID); assert(id->is_static_field_id(), "invalid static field id"); found = id->find_local_field(&fd); } else { // Non-static field. The fieldID is really the offset of the field within the instanceOop. int offset = jfieldIDWorkaround::from_instance_jfieldID(k, fieldID); found = instanceKlass::cast(k)->find_field_from_offset(offset, false, &fd); } assert(found, "bad fieldID passed into jni_ToReflectedField"); oop reflected = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL); ret = JNIHandles::make_local(env, reflected); return ret; JNI_END // // Accessing Static Fields // DT_RETURN_MARK_DECL(GetStaticFieldID, jfieldID); JNI_ENTRY(jfieldID, jni_GetStaticFieldID(JNIEnv *env, jclass clazz, const char *name, const char *sig)) JNIWrapper("GetStaticFieldID"); DTRACE_PROBE4(hotspot_jni, GetStaticFieldID__entry, env, clazz, name, sig); jfieldID ret = NULL; DT_RETURN_MARK(GetStaticFieldID, jfieldID, (const jfieldID&)ret); // The class should have been loaded (we have an instance of the class // passed in) so the field and signature should already be in the symbol // table. If they're not there, the field doesn't exist. TempNewSymbol fieldname = SymbolTable::probe(name, (int)strlen(name)); TempNewSymbol signame = SymbolTable::probe(sig, (int)strlen(sig)); if (fieldname == NULL || signame == NULL) { THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); } KlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); // Make sure class is initialized before handing id's out to static fields Klass::cast(k())->initialize(CHECK_NULL); fieldDescriptor fd; if (!Klass::cast(k())->oop_is_instance() || !instanceKlass::cast(k())->find_field(fieldname, signame, true, &fd)) { THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), (char*) name); } // A jfieldID for a static field is a JNIid specifying the field holder and the offset within the klassOop JNIid* id = instanceKlass::cast(fd.field_holder())->jni_id_for(fd.offset()); debug_only(id->set_is_static_field_id();) debug_only(id->verify(fd.field_holder())); 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()->java_mirror()->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()->java_mirror()-> 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()->java_mirror()->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()->java_mirror()-> Fieldname##_field_put (id->offset(), value); \ DTRACE_PROBE(hotspot_jni, SetStatic##Result##Field__return);\ JNI_END DEFINE_SETSTATICFIELD(jboolean, bool, Boolean, 'Z', z) DEFINE_SETSTATICFIELD(jbyte, byte, Byte, 'B', b) DEFINE_SETSTATICFIELD(jchar, char, Char, 'C', c) DEFINE_SETSTATICFIELD(jshort, short, Short, 'S', s) DEFINE_SETSTATICFIELD(jint, int, Int, 'I', i) DEFINE_SETSTATICFIELD(jlong, long, Long, 'J', j) DEFINE_SETSTATICFIELD(jfloat, float, Float, 'F', f) DEFINE_SETSTATICFIELD(jdouble, double, Double, 'D', d) // // String Operations // // Unicode Interface DT_RETURN_MARK_DECL(NewString, jstring); JNI_ENTRY(jstring, jni_NewString(JNIEnv *env, const jchar *unicodeChars, jsize len)) JNIWrapper("NewString"); DTRACE_PROBE3(hotspot_jni, NewString__entry, env, unicodeChars, len); jstring ret = NULL; DT_RETURN_MARK(NewString, jstring, (const jstring&)ret); oop string=java_lang_String::create_oop_from_unicode((jchar*) unicodeChars, len, CHECK_NULL); ret = (jstring) JNIHandles::make_local(env, string); return ret; JNI_END JNI_QUICK_ENTRY(jsize, jni_GetStringLength(JNIEnv *env, jstring string)) JNIWrapper("GetStringLength"); DTRACE_PROBE2(hotspot_jni, GetStringLength__entry, env, string); jsize ret = java_lang_String::length(JNIHandles::resolve_non_null(string)); DTRACE_PROBE1(hotspot_jni, GetStringLength__return, ret); return ret; JNI_END JNI_QUICK_ENTRY(const jchar*, jni_GetStringChars( JNIEnv *env, jstring string, jboolean *isCopy)) JNIWrapper("GetStringChars"); DTRACE_PROBE3(hotspot_jni, GetStringChars__entry, env, string, isCopy); //%note jni_5 if (isCopy != NULL) { *isCopy = JNI_TRUE; } oop s = JNIHandles::resolve_non_null(string); int s_len = java_lang_String::length(s); typeArrayOop s_value = java_lang_String::value(s); int s_offset = java_lang_String::offset(s); jchar* buf = NEW_C_HEAP_ARRAY(jchar, s_len + 1); // add one for zero termination if (s_len > 0) { memcpy(buf, s_value->char_at_addr(s_offset), sizeof(jchar)*s_len); } buf[s_len] = 0; DTRACE_PROBE1(hotspot_jni, GetStringChars__return, buf); return buf; JNI_END JNI_QUICK_ENTRY(void, jni_ReleaseStringChars(JNIEnv *env, jstring str, const jchar *chars)) JNIWrapper("ReleaseStringChars"); DTRACE_PROBE3(hotspot_jni, ReleaseStringChars__entry, env, str, chars); //%note jni_6 if (chars != NULL) { // Since String objects are supposed to be immutable, don't copy any // new data back. A bad user will have to go after the char array. FreeHeap((void*) chars); } DTRACE_PROBE(hotspot_jni, ReleaseStringChars__return); JNI_END // UTF Interface DT_RETURN_MARK_DECL(NewStringUTF, jstring); JNI_ENTRY(jstring, jni_NewStringUTF(JNIEnv *env, const char *bytes)) JNIWrapper("NewStringUTF"); DTRACE_PROBE2(hotspot_jni, NewStringUTF__entry, env, bytes); jstring ret; DT_RETURN_MARK(NewStringUTF, jstring, (const jstring&)ret); oop result = java_lang_String::create_oop_from_str((char*) bytes, CHECK_NULL); ret = (jstring) JNIHandles::make_local(env, result); return ret; JNI_END JNI_ENTRY(jsize, jni_GetStringUTFLength(JNIEnv *env, jstring string)) JNIWrapper("GetStringUTFLength"); DTRACE_PROBE2(hotspot_jni, GetStringUTFLength__entry, env, string); jsize ret = java_lang_String::utf8_length(JNIHandles::resolve_non_null(string)); DTRACE_PROBE1(hotspot_jni, GetStringUTFLength__return, ret); return ret; JNI_END JNI_ENTRY(const char*, jni_GetStringUTFChars(JNIEnv *env, jstring string, jboolean *isCopy)) JNIWrapper("GetStringUTFChars"); DTRACE_PROBE3(hotspot_jni, GetStringUTFChars__entry, env, string, isCopy); oop java_string = JNIHandles::resolve_non_null(string); size_t length = java_lang_String::utf8_length(java_string); char* result = AllocateHeap(length + 1, "GetStringUTFChars"); java_lang_String::as_utf8_string(java_string, result, (int) length + 1); if (isCopy != NULL) *isCopy = JNI_TRUE; DTRACE_PROBE1(hotspot_jni, GetStringUTFChars__return, result); return result; JNI_END JNI_LEAF(void, jni_ReleaseStringUTFChars(JNIEnv *env, jstring str, const char *chars)) JNIWrapper("ReleaseStringUTFChars"); DTRACE_PROBE3(hotspot_jni, ReleaseStringUTFChars__entry, env, str, chars); if (chars != NULL) { FreeHeap((char*) chars); } DTRACE_PROBE(hotspot_jni, ReleaseStringUTFChars__return); JNI_END JNI_QUICK_ENTRY(jsize, jni_GetArrayLength(JNIEnv *env, jarray array)) JNIWrapper("GetArrayLength"); DTRACE_PROBE2(hotspot_jni, GetArrayLength__entry, env, array); arrayOop a = arrayOop(JNIHandles::resolve_non_null(array)); assert(a->is_array(), "must be array"); jsize ret = a->length(); DTRACE_PROBE1(hotspot_jni, GetArrayLength__return, ret); return ret; JNI_END // // Object Array Operations // DT_RETURN_MARK_DECL(NewObjectArray, jobjectArray); JNI_ENTRY(jobjectArray, jni_NewObjectArray(JNIEnv *env, jsize length, jclass elementClass, jobject initialElement)) JNIWrapper("NewObjectArray"); DTRACE_PROBE4(hotspot_jni, NewObjectArray__entry, env, length, elementClass, initialElement); jobjectArray ret = NULL; DT_RETURN_MARK(NewObjectArray, jobjectArray, (const jobjectArray&)ret); KlassHandle ek(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(elementClass))); klassOop ako = Klass::cast(ek())->array_klass(CHECK_NULL); KlassHandle ak = KlassHandle(THREAD, ako); objArrayKlass::cast(ak())->initialize(CHECK_NULL); objArrayOop result = objArrayKlass::cast(ak())->allocate(length, CHECK_NULL); oop initial_value = JNIHandles::resolve(initialElement); if (initial_value != NULL) { // array already initialized with NULL for (int index = 0; index < length; index++) { result->obj_at_put(index, initial_value); } } ret = (jobjectArray) JNIHandles::make_local(env, result); return ret; JNI_END DT_RETURN_MARK_DECL(GetObjectArrayElement, jobject); JNI_ENTRY(jobject, jni_GetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index)) JNIWrapper("GetObjectArrayElement"); DTRACE_PROBE3(hotspot_jni, GetObjectArrayElement__entry, env, array, index); jobject ret = NULL; DT_RETURN_MARK(GetObjectArrayElement, jobject, (const jobject&)ret); objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); if (a->is_within_bounds(index)) { ret = JNIHandles::make_local(env, a->obj_at(index)); return ret; } else { char buf[jintAsStringSize]; sprintf(buf, "%d", index); THROW_MSG_0(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); } JNI_END DT_VOID_RETURN_MARK_DECL(SetObjectArrayElement); JNI_ENTRY(void, jni_SetObjectArrayElement(JNIEnv *env, jobjectArray array, jsize index, jobject value)) JNIWrapper("SetObjectArrayElement"); DTRACE_PROBE4(hotspot_jni, SetObjectArrayElement__entry, env, array, index, value); DT_VOID_RETURN_MARK(SetObjectArrayElement); objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(array)); oop v = JNIHandles::resolve(value); if (a->is_within_bounds(index)) { if (v == NULL || v->is_a(objArrayKlass::cast(a->klass())->element_klass())) { a->obj_at_put(index, v); } else { THROW(vmSymbols::java_lang_ArrayStoreException()); } } else { char buf[jintAsStringSize]; sprintf(buf, "%d", index); THROW_MSG(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), buf); } JNI_END #define DEFINE_NEWSCALARARRAY(Return,Allocator,Result) \ \ DT_RETURN_MARK_DECL(New##Result##Array, Return);\ \ JNI_ENTRY(Return, \ jni_New##Result##Array(JNIEnv *env, jsize len)) \ JNIWrapper("New" XSTR(Result) "Array"); \ DTRACE_PROBE2(hotspot_jni, New##Result##Array__entry, env, len);\ Return ret = NULL;\ DT_RETURN_MARK(New##Result##Array, Return, (const Return&)ret);\ \ oop obj= oopFactory::Allocator(len, CHECK_0); \ ret = (Return) JNIHandles::make_local(env, obj); \ return ret;\ JNI_END DEFINE_NEWSCALARARRAY(jbooleanArray, new_boolArray, Boolean) DEFINE_NEWSCALARARRAY(jbyteArray, new_byteArray, Byte) DEFINE_NEWSCALARARRAY(jshortArray, new_shortArray, Short) DEFINE_NEWSCALARARRAY(jcharArray, new_charArray, Char) DEFINE_NEWSCALARARRAY(jintArray, new_intArray, Int) DEFINE_NEWSCALARARRAY(jlongArray, new_longArray, Long) DEFINE_NEWSCALARARRAY(jfloatArray, new_singleArray, Float) DEFINE_NEWSCALARARRAY(jdoubleArray, new_doubleArray, Double) // Return an address which will fault if the caller writes to it. static char* get_bad_address() { static char* bad_address = NULL; if (bad_address == NULL) { size_t size = os::vm_allocation_granularity(); bad_address = os::reserve_memory(size); if (bad_address != NULL) { os::protect_memory(bad_address, size, os::MEM_PROT_READ, /*is_committed*/false); } } return bad_address; } #define DEFINE_GETSCALARARRAYELEMENTS(ElementTag,ElementType,Result, Tag) \ \ JNI_QUICK_ENTRY(ElementType*, \ jni_Get##Result##ArrayElements(JNIEnv *env, ElementType##Array array, jboolean *isCopy)) \ JNIWrapper("Get" XSTR(Result) "ArrayElements"); \ DTRACE_PROBE3(hotspot_jni, Get##Result##ArrayElements__entry, env, array, isCopy);\ /* allocate an chunk of memory in c land */ \ typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ ElementType* result; \ int len = a->length(); \ if (len == 0) { \ /* Empty array: legal but useless, can't return NULL. \ * Return a pointer to something useless. \ * Avoid asserts in typeArrayOop. */ \ result = (ElementType*)get_bad_address(); \ } else { \ result = NEW_C_HEAP_ARRAY(ElementType, len); \ /* copy the array to the c chunk */ \ memcpy(result, a->Tag##_at_addr(0), sizeof(ElementType)*len); \ } \ if (isCopy) *isCopy = JNI_TRUE; \ DTRACE_PROBE1(hotspot_jni, Get##Result##ArrayElements__return, result);\ return result; \ JNI_END DEFINE_GETSCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool) DEFINE_GETSCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte) DEFINE_GETSCALARARRAYELEMENTS(T_SHORT, jshort, Short, short) DEFINE_GETSCALARARRAYELEMENTS(T_CHAR, jchar, Char, char) DEFINE_GETSCALARARRAYELEMENTS(T_INT, jint, Int, int) DEFINE_GETSCALARARRAYELEMENTS(T_LONG, jlong, Long, long) DEFINE_GETSCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float) DEFINE_GETSCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double) #define DEFINE_RELEASESCALARARRAYELEMENTS(ElementTag,ElementType,Result,Tag) \ \ JNI_QUICK_ENTRY(void, \ jni_Release##Result##ArrayElements(JNIEnv *env, ElementType##Array array, \ ElementType *buf, jint mode)) \ JNIWrapper("Release" XSTR(Result) "ArrayElements"); \ DTRACE_PROBE4(hotspot_jni, Release##Result##ArrayElements__entry, env, array, buf, mode);\ typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(array)); \ int len = a->length(); \ if (len != 0) { /* Empty array: nothing to free or copy. */ \ if ((mode == 0) || (mode == JNI_COMMIT)) { \ memcpy(a->Tag##_at_addr(0), buf, sizeof(ElementType)*len); \ } \ if ((mode == 0) || (mode == JNI_ABORT)) { \ FreeHeap(buf); \ } \ } \ DTRACE_PROBE(hotspot_jni, Release##Result##ArrayElements__return);\ JNI_END DEFINE_RELEASESCALARARRAYELEMENTS(T_BOOLEAN, jboolean, Boolean, bool) DEFINE_RELEASESCALARARRAYELEMENTS(T_BYTE, jbyte, Byte, byte) DEFINE_RELEASESCALARARRAYELEMENTS(T_SHORT, jshort, Short, short) DEFINE_RELEASESCALARARRAYELEMENTS(T_CHAR, jchar, Char, char) DEFINE_RELEASESCALARARRAYELEMENTS(T_INT, jint, Int, int) DEFINE_RELEASESCALARARRAYELEMENTS(T_LONG, jlong, Long, long) DEFINE_RELEASESCALARARRAYELEMENTS(T_FLOAT, jfloat, Float, float) DEFINE_RELEASESCALARARRAYELEMENTS(T_DOUBLE, jdouble, Double, double) #define DEFINE_GETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag) \ DT_VOID_RETURN_MARK_DECL(Get##Result##ArrayRegion);\ \ JNI_ENTRY(void, \ jni_Get##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ jsize len, ElementType *buf)) \ JNIWrapper("Get" XSTR(Result) "ArrayRegion"); \ DTRACE_PROBE5(hotspot_jni, Get##Result##ArrayRegion__entry, env, array, start, len, buf);\ DT_VOID_RETURN_MARK(Get##Result##ArrayRegion); \ typeArrayOop src = typeArrayOop(JNIHandles::resolve_non_null(array)); \ if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)src->length())) { \ THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ } else { \ if (len > 0) { \ int sc = typeArrayKlass::cast(src->klass())->log2_element_size(); \ memcpy((u_char*) buf, \ (u_char*) src->Tag##_at_addr(start), \ len << sc); \ } \ } \ JNI_END DEFINE_GETSCALARARRAYREGION(T_BOOLEAN, jboolean,Boolean, bool) DEFINE_GETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte) DEFINE_GETSCALARARRAYREGION(T_SHORT, jshort, Short, short) DEFINE_GETSCALARARRAYREGION(T_CHAR, jchar, Char, char) DEFINE_GETSCALARARRAYREGION(T_INT, jint, Int, int) DEFINE_GETSCALARARRAYREGION(T_LONG, jlong, Long, long) DEFINE_GETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float) DEFINE_GETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double) #define DEFINE_SETSCALARARRAYREGION(ElementTag,ElementType,Result, Tag) \ DT_VOID_RETURN_MARK_DECL(Set##Result##ArrayRegion);\ \ JNI_ENTRY(void, \ jni_Set##Result##ArrayRegion(JNIEnv *env, ElementType##Array array, jsize start, \ jsize len, const ElementType *buf)) \ JNIWrapper("Set" XSTR(Result) "ArrayRegion"); \ DTRACE_PROBE5(hotspot_jni, Set##Result##ArrayRegion__entry, env, array, start, len, buf);\ DT_VOID_RETURN_MARK(Set##Result##ArrayRegion); \ typeArrayOop dst = typeArrayOop(JNIHandles::resolve_non_null(array)); \ if (start < 0 || len < 0 || ((unsigned int)start + (unsigned int)len > (unsigned int)dst->length())) { \ THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); \ } else { \ if (len > 0) { \ int sc = typeArrayKlass::cast(dst->klass())->log2_element_size(); \ memcpy((u_char*) dst->Tag##_at_addr(start), \ (u_char*) buf, \ len << sc); \ } \ } \ JNI_END DEFINE_SETSCALARARRAYREGION(T_BOOLEAN, jboolean, Boolean, bool) DEFINE_SETSCALARARRAYREGION(T_BYTE, jbyte, Byte, byte) DEFINE_SETSCALARARRAYREGION(T_SHORT, jshort, Short, short) DEFINE_SETSCALARARRAYREGION(T_CHAR, jchar, Char, char) DEFINE_SETSCALARARRAYREGION(T_INT, jint, Int, int) DEFINE_SETSCALARARRAYREGION(T_LONG, jlong, Long, long) DEFINE_SETSCALARARRAYREGION(T_FLOAT, jfloat, Float, float) DEFINE_SETSCALARARRAYREGION(T_DOUBLE, jdouble, Double, double) // // Interception of natives // // The RegisterNatives call being attempted tried to register with a method that // is not native. Ask JVM TI what prefixes have been specified. Then check // to see if the native method is now wrapped with the prefixes. See the // SetNativeMethodPrefix(es) functions in the JVM TI Spec for details. static methodOop find_prefixed_native(KlassHandle k, Symbol* name, Symbol* signature, TRAPS) { ResourceMark rm(THREAD); methodOop method; int name_len = name->utf8_length(); char* name_str = name->as_utf8(); int prefix_count; char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count); for (int i = 0; i < prefix_count; i++) { char* prefix = prefixes[i]; int prefix_len = (int)strlen(prefix); // try adding this prefix to the method name and see if it matches another method name int trial_len = name_len + prefix_len; char* trial_name_str = NEW_RESOURCE_ARRAY(char, trial_len + 1); strcpy(trial_name_str, prefix); strcat(trial_name_str, name_str); TempNewSymbol trial_name = SymbolTable::probe(trial_name_str, trial_len); if (trial_name == NULL) { continue; // no such symbol, so this prefix wasn't used, try the next prefix } method = Klass::cast(k())->lookup_method(trial_name, signature); if (method == NULL) { continue; // signature doesn't match, try the next prefix } if (method->is_native()) { method->set_is_prefixed_native(); return method; // wahoo, we found a prefixed version of the method, return it } // found as non-native, so prefix is good, add it, probably just need more prefixes name_len = trial_len; name_str = trial_name_str; } return NULL; // not found } static bool register_native(KlassHandle k, Symbol* name, Symbol* signature, address entry, TRAPS) { methodOop method = Klass::cast(k())->lookup_method(name, signature); if (method == NULL) { ResourceMark rm; stringStream st; st.print("Method %s name or signature does not match", methodOopDesc::name_and_sig_as_C_string(Klass::cast(k()), name, signature)); THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); } if (!method->is_native()) { // trying to register to a non-native method, see if a JVM TI agent has added prefix(es) method = find_prefixed_native(k, name, signature, THREAD); if (method == NULL) { ResourceMark rm; stringStream st; st.print("Method %s is not declared as native", methodOopDesc::name_and_sig_as_C_string(Klass::cast(k()), name, signature)); THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), false); } } if (entry != NULL) { method->set_native_function(entry, methodOopDesc::native_bind_event_is_interesting); } else { method->clear_native_function(); } if (PrintJNIResolving) { ResourceMark rm(THREAD); tty->print_cr("[Registering JNI native method %s.%s]", Klass::cast(method->method_holder())->external_name(), method->name()->as_C_string()); } return true; } DT_RETURN_MARK_DECL(RegisterNatives, jint); JNI_ENTRY(jint, jni_RegisterNatives(JNIEnv *env, jclass clazz, const JNINativeMethod *methods, jint nMethods)) JNIWrapper("RegisterNatives"); DTRACE_PROBE4(hotspot_jni, RegisterNatives__entry, env, clazz, methods, nMethods); jint ret = 0; DT_RETURN_MARK(RegisterNatives, jint, (const jint&)ret); KlassHandle h_k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); for (int index = 0; index < nMethods; index++) { const char* meth_name = methods[index].name; const char* meth_sig = methods[index].signature; int meth_name_len = (int)strlen(meth_name); // The class should have been loaded (we have an instance of the class // passed in) so the method and signature should already be in the symbol // table. If they're not there, the method doesn't exist. TempNewSymbol name = SymbolTable::probe(meth_name, meth_name_len); TempNewSymbol signature = SymbolTable::probe(meth_sig, (int)strlen(meth_sig)); if (name == NULL || signature == NULL) { ResourceMark rm; stringStream st; st.print("Method %s.%s%s not found", Klass::cast(h_k())->external_name(), meth_name, meth_sig); // Must return negative value on failure THROW_MSG_(vmSymbols::java_lang_NoSuchMethodError(), st.as_string(), -1); } bool res = register_native(h_k, name, signature, (address) methods[index].fnPtr, THREAD); if (!res) { ret = -1; break; } } return ret; JNI_END JNI_ENTRY(jint, jni_UnregisterNatives(JNIEnv *env, jclass clazz)) JNIWrapper("UnregisterNatives"); DTRACE_PROBE2(hotspot_jni, UnregisterNatives__entry, env, clazz); klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz)); //%note jni_2 if (Klass::cast(k)->oop_is_instance()) { for (int index = 0; index < instanceKlass::cast(k)->methods()->length(); index++) { methodOop m = methodOop(instanceKlass::cast(k)->methods()->obj_at(index)); if (m->is_native()) { m->clear_native_function(); m->set_signature_handler(NULL); } } } DTRACE_PROBE1(hotspot_jni, UnregisterNatives__return, 0); return 0; JNI_END // // Monitor functions // DT_RETURN_MARK_DECL(MonitorEnter, jint); JNI_ENTRY(jint, jni_MonitorEnter(JNIEnv *env, jobject jobj)) DTRACE_PROBE2(hotspot_jni, MonitorEnter__entry, env, jobj); jint ret = JNI_ERR; DT_RETURN_MARK(MonitorEnter, jint, (const jint&)ret); // If the object is null, we can't do anything with it if (jobj == NULL) { THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); } Handle obj(thread, JNIHandles::resolve_non_null(jobj)); ObjectSynchronizer::jni_enter(obj, CHECK_(JNI_ERR)); ret = JNI_OK; return ret; JNI_END DT_RETURN_MARK_DECL(MonitorExit, jint); JNI_ENTRY(jint, jni_MonitorExit(JNIEnv *env, jobject jobj)) DTRACE_PROBE2(hotspot_jni, MonitorExit__entry, env, jobj); jint ret = JNI_ERR; DT_RETURN_MARK(MonitorExit, jint, (const jint&)ret); // Don't do anything with a null object if (jobj == NULL) { THROW_(vmSymbols::java_lang_NullPointerException(), JNI_ERR); } Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); ObjectSynchronizer::jni_exit(obj(), CHECK_(JNI_ERR)); ret = JNI_OK; return ret; JNI_END // // Extensions // DT_VOID_RETURN_MARK_DECL(GetStringRegion); JNI_ENTRY(void, jni_GetStringRegion(JNIEnv *env, jstring string, jsize start, jsize len, jchar *buf)) JNIWrapper("GetStringRegion"); DTRACE_PROBE5(hotspot_jni, GetStringRegion__entry, env, string, start, len, buf); DT_VOID_RETURN_MARK(GetStringRegion); oop s = JNIHandles::resolve_non_null(string); int s_len = java_lang_String::length(s); if (start < 0 || len < 0 || start + len > s_len) { THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); } else { if (len > 0) { int s_offset = java_lang_String::offset(s); typeArrayOop s_value = java_lang_String::value(s); memcpy(buf, s_value->char_at_addr(s_offset+start), sizeof(jchar)*len); } } JNI_END DT_VOID_RETURN_MARK_DECL(GetStringUTFRegion); JNI_ENTRY(void, jni_GetStringUTFRegion(JNIEnv *env, jstring string, jsize start, jsize len, char *buf)) JNIWrapper("GetStringUTFRegion"); DTRACE_PROBE5(hotspot_jni, GetStringUTFRegion__entry, env, string, start, len, buf); DT_VOID_RETURN_MARK(GetStringUTFRegion); oop s = JNIHandles::resolve_non_null(string); int s_len = java_lang_String::length(s); if (start < 0 || len < 0 || start + len > s_len) { THROW(vmSymbols::java_lang_StringIndexOutOfBoundsException()); } else { //%note jni_7 if (len > 0) { ResourceMark rm(THREAD); char *utf_region = java_lang_String::as_utf8_string(s, start, len); int utf_len = (int)strlen(utf_region); memcpy(buf, utf_region, utf_len); buf[utf_len] = 0; } else { // JDK null-terminates the buffer even in len is zero if (buf != NULL) { buf[0] = 0; } } } JNI_END JNI_ENTRY(void*, jni_GetPrimitiveArrayCritical(JNIEnv *env, jarray array, jboolean *isCopy)) JNIWrapper("GetPrimitiveArrayCritical"); DTRACE_PROBE3(hotspot_jni, GetPrimitiveArrayCritical__entry, env, array, isCopy); GC_locker::lock_critical(thread); if (isCopy != NULL) { *isCopy = JNI_FALSE; } oop a = JNIHandles::resolve_non_null(array); assert(a->is_array(), "just checking"); BasicType type; if (a->is_objArray()) { type = T_OBJECT; } else { type = typeArrayKlass::cast(a->klass())->element_type(); } void* ret = arrayOop(a)->base(type); DTRACE_PROBE1(hotspot_jni, GetPrimitiveArrayCritical__return, ret); return ret; JNI_END JNI_ENTRY(void, jni_ReleasePrimitiveArrayCritical(JNIEnv *env, jarray array, void *carray, jint mode)) JNIWrapper("ReleasePrimitiveArrayCritical"); DTRACE_PROBE4(hotspot_jni, ReleasePrimitiveArrayCritical__entry, env, array, carray, mode); // The array, carray and mode arguments are ignored GC_locker::unlock_critical(thread); DTRACE_PROBE(hotspot_jni, ReleasePrimitiveArrayCritical__return); JNI_END JNI_ENTRY(const jchar*, jni_GetStringCritical(JNIEnv *env, jstring string, jboolean *isCopy)) JNIWrapper("GetStringCritical"); DTRACE_PROBE3(hotspot_jni, GetStringCritical__entry, env, string, isCopy); GC_locker::lock_critical(thread); if (isCopy != NULL) { *isCopy = JNI_FALSE; } oop s = JNIHandles::resolve_non_null(string); int s_len = java_lang_String::length(s); 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 TempNewSymbol sym = SymbolTable::new_symbol(name, CHECK_NULL); jclass result = find_class_from_class_loader(env, sym, true, loader, protection_domain, true, CHECK_NULL); if (TraceClassResolution && result != NULL) { trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result))); } return result; } // 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 { while (!directBufferSupportInitializeEnded && !directBufferSupportInitializeFailed) { // Set state as yield_all can call os:sleep. On Solaris, yield_all calls // os::sleep which requires the VM state transition. On other platforms, it // is not necessary. The following call to change the VM state is purposely // put inside the loop to avoid potential deadlock when multiple threads // try to call this method. See 6791815 for more details. ThreadInVMfromNative tivn(thread); 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 */ 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); // We're about to use Atomic::xchg for synchronization. Some Zero // platforms use the GCC builtin __sync_lock_test_and_set for this, // but __sync_lock_test_and_set is not guaranteed to do what we want // on all architectures. So we check it works before relying on it. #if defined(ZERO) && defined(ASSERT) { jint a = 0xcafebabe; jint b = Atomic::xchg(0xdeadbeef, &a); void *c = &a; void *d = Atomic::xchg_ptr(&b, &c); assert(a == (jint) 0xdeadbeef && b == (jint) 0xcafebabe, "Atomic::xchg() works"); assert(c == &b && d == &a, "Atomic::xchg_ptr() works"); } #endif // ZERO && ASSERT // 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); } if (BootstrapC1X) { CompileBroker::bootstrap_c1x(); } // 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); } NOT_PRODUCT(test_error_handler(ErrorHandlerTest)); 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; } // Enable stack overflow checks thread->create_stack_guard_pages(); thread->initialize_tlab(); thread->cache_global_variables(); // 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(); // 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 };