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/*
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* Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "precompiled.hpp"
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#include "jni.h"
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#include "classfile/javaClasses.inline.hpp"
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#include "classfile/modules.hpp"
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#include "classfile/symbolTable.hpp"
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#include "classfile/systemDictionary.hpp"
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#include "classfile/vmSymbols.hpp"
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#include "jfr/jni/jfrJavaCall.hpp"
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#include "jfr/jni/jfrJavaSupport.hpp"
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#include "jfr/support/jfrThreadId.hpp"
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#include "logging/log.hpp"
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#include "memory/resourceArea.hpp"
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#include "oops/instanceOop.hpp"
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#include "oops/oop.inline.hpp"
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#include "oops/objArrayKlass.hpp"
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#include "oops/objArrayOop.inline.hpp"
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#include "runtime/handles.inline.hpp"
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#include "runtime/fieldDescriptor.hpp"
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#include "runtime/java.hpp"
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#include "runtime/jniHandles.inline.hpp"
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#include "runtime/synchronizer.hpp"
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#include "runtime/thread.inline.hpp"
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#include "runtime/threadSMR.hpp"
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#ifdef ASSERT
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void JfrJavaSupport::check_java_thread_in_vm(Thread* t) {
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assert(t != NULL, "invariant");
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assert(t->is_Java_thread(), "invariant");
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assert(((JavaThread*)t)->thread_state() == _thread_in_vm, "invariant");
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}
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void JfrJavaSupport::check_java_thread_in_native(Thread* t) {
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assert(t != NULL, "invariant");
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assert(t->is_Java_thread(), "invariant");
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assert(((JavaThread*)t)->thread_state() == _thread_in_native, "invariant");
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}
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#endif
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/*
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* Handles and references
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*/
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jobject JfrJavaSupport::local_jni_handle(const oop obj, Thread* t) {
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DEBUG_ONLY(check_java_thread_in_vm(t));
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return t->active_handles()->allocate_handle(obj);
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}
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jobject JfrJavaSupport::local_jni_handle(const jobject handle, Thread* t) {
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DEBUG_ONLY(check_java_thread_in_vm(t));
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const oop obj = JNIHandles::resolve(handle);
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return obj == NULL ? NULL : local_jni_handle(obj, t);
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}
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void JfrJavaSupport::destroy_local_jni_handle(jobject handle) {
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JNIHandles::destroy_local(handle);
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}
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jobject JfrJavaSupport::global_jni_handle(const oop obj, Thread* t) {
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DEBUG_ONLY(check_java_thread_in_vm(t));
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HandleMark hm(t);
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return JNIHandles::make_global(Handle(t, obj));
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}
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jobject JfrJavaSupport::global_jni_handle(const jobject handle, Thread* t) {
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const oop obj = JNIHandles::resolve(handle);
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return obj == NULL ? NULL : global_jni_handle(obj, t);
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}
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void JfrJavaSupport::destroy_global_jni_handle(jobject handle) {
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JNIHandles::destroy_global(handle);
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}
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oop JfrJavaSupport::resolve_non_null(jobject obj) {
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return JNIHandles::resolve_non_null(obj);
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}
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/*
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* Method invocation
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*/
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void JfrJavaSupport::call_static(JfrJavaArguments* args, TRAPS) {
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JfrJavaCall::call_static(args, THREAD);
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}
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void JfrJavaSupport::call_special(JfrJavaArguments* args, TRAPS) {
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JfrJavaCall::call_special(args, THREAD);
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}
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void JfrJavaSupport::call_virtual(JfrJavaArguments* args, TRAPS) {
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JfrJavaCall::call_virtual(args, THREAD);
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}
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void JfrJavaSupport::notify_all(jobject object, TRAPS) {
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assert(object != NULL, "invariant");
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DEBUG_ONLY(check_java_thread_in_vm(THREAD));
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HandleMark hm(THREAD);
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Handle h_obj(THREAD, resolve_non_null(object));
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assert(h_obj.not_null(), "invariant");
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ObjectSynchronizer::jni_enter(h_obj, THREAD);
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ObjectSynchronizer::notifyall(h_obj, THREAD);
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ObjectSynchronizer::jni_exit(h_obj(), THREAD);
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DEBUG_ONLY(check_java_thread_in_vm(THREAD));
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}
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/*
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* Object construction
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*/
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static void object_construction(JfrJavaArguments* args, JavaValue* result, InstanceKlass* klass, TRAPS) {
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assert(args != NULL, "invariant");
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assert(result != NULL, "invariant");
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assert(klass != NULL, "invariant");
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assert(klass->is_initialized(), "invariant");
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HandleMark hm(THREAD);
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instanceOop obj = klass->allocate_instance(CHECK);
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instanceHandle h_obj(THREAD, obj);
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assert(h_obj.not_null(), "invariant");
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args->set_receiver(h_obj);
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result->set_type(T_VOID); // constructor result type
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JfrJavaSupport::call_special(args, CHECK);
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result->set_type(T_OBJECT); // set back to original result type
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result->set_jobject((jobject)h_obj());
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}
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static void array_construction(JfrJavaArguments* args, JavaValue* result, InstanceKlass* klass, int array_length, TRAPS) {
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assert(args != NULL, "invariant");
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assert(result != NULL, "invariant");
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assert(klass != NULL, "invariant");
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assert(klass->is_initialized(), "invariant");
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Klass* const ak = klass->array_klass(THREAD);
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ObjArrayKlass::cast(ak)->initialize(THREAD);
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HandleMark hm(THREAD);
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objArrayOop arr = ObjArrayKlass::cast(ak)->allocate(array_length, CHECK);
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result->set_jobject((jobject)arr);
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}
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static void create_object(JfrJavaArguments* args, JavaValue* result, TRAPS) {
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assert(args != NULL, "invariant");
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assert(result != NULL, "invariant");
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assert(result->get_type() == T_OBJECT, "invariant");
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DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(THREAD));
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InstanceKlass* const klass = static_cast<InstanceKlass*>(args->klass());
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klass->initialize(CHECK);
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const int array_length = args->array_length();
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if (array_length > 0) {
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array_construction(args, result, klass, array_length, CHECK);
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} else {
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object_construction(args, result, klass, THREAD);
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}
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}
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static void handle_result(JavaValue* result, bool global_ref, Thread* t) {
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assert(result != NULL, "invariant");
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DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(t));
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const oop result_oop = (const oop)result->get_jobject();
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if (result_oop == NULL) {
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return;
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}
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result->set_jobject(global_ref ?
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JfrJavaSupport::global_jni_handle(result_oop, t) :
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JfrJavaSupport::local_jni_handle(result_oop, t));
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}
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void JfrJavaSupport::new_object(JfrJavaArguments* args, TRAPS) {
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assert(args != NULL, "invariant");
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DEBUG_ONLY(check_java_thread_in_vm(THREAD));
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create_object(args, args->result(), THREAD);
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}
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void JfrJavaSupport::new_object_local_ref(JfrJavaArguments* args, TRAPS) {
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assert(args != NULL, "invariant");
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DEBUG_ONLY(check_java_thread_in_vm(THREAD));
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JavaValue* const result = args->result();
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assert(result != NULL, "invariant");
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create_object(args, result, CHECK);
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handle_result(result, false, THREAD);
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}
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void JfrJavaSupport::new_object_global_ref(JfrJavaArguments* args, TRAPS) {
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assert(args != NULL, "invariant");
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DEBUG_ONLY(check_java_thread_in_vm(THREAD));
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JavaValue* const result = args->result();
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assert(result != NULL, "invariant");
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create_object(args, result, CHECK);
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handle_result(result, true, THREAD);
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}
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jstring JfrJavaSupport::new_string(const char* c_str, TRAPS) {
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assert(c_str != NULL, "invariant");
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DEBUG_ONLY(check_java_thread_in_vm(THREAD));
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const oop result = java_lang_String::create_oop_from_str(c_str, THREAD);
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return (jstring)local_jni_handle(result, THREAD);
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}
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jobjectArray JfrJavaSupport::new_string_array(int length, TRAPS) {
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DEBUG_ONLY(check_java_thread_in_vm(THREAD));
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JavaValue result(T_OBJECT);
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JfrJavaArguments args(&result, "java/lang/String", "<init>", "()V", CHECK_NULL);
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args.set_array_length(length);
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new_object_local_ref(&args, THREAD);
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return (jobjectArray)args.result()->get_jobject();
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}
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jobject JfrJavaSupport::new_java_lang_Boolean(bool value, TRAPS) {
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DEBUG_ONLY(check_java_thread_in_vm(THREAD));
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JavaValue result(T_OBJECT);
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JfrJavaArguments args(&result, "java/lang/Boolean", "<init>", "(Z)V", CHECK_NULL);
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args.push_int(value ? (jint)JNI_TRUE : (jint)JNI_FALSE);
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new_object_local_ref(&args, THREAD);
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return args.result()->get_jobject();
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}
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jobject JfrJavaSupport::new_java_lang_Integer(jint value, TRAPS) {
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DEBUG_ONLY(check_java_thread_in_vm(THREAD));
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JavaValue result(T_OBJECT);
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JfrJavaArguments args(&result, "java/lang/Integer", "<init>", "(I)V", CHECK_NULL);
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args.push_int(value);
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new_object_local_ref(&args, THREAD);
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return args.result()->get_jobject();
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}
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jobject JfrJavaSupport::new_java_lang_Long(jlong value, TRAPS) {
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DEBUG_ONLY(check_java_thread_in_vm(THREAD));
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JavaValue result(T_OBJECT);
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JfrJavaArguments args(&result, "java/lang/Long", "<init>", "(J)V", CHECK_NULL);
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args.push_long(value);
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new_object_local_ref(&args, THREAD);
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return args.result()->get_jobject();
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}
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void JfrJavaSupport::set_array_element(jobjectArray arr, jobject element, int index, Thread* t) {
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assert(arr != NULL, "invariant");
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DEBUG_ONLY(check_java_thread_in_vm(t));
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HandleMark hm(t);
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objArrayHandle a(t, (objArrayOop)resolve_non_null(arr));
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a->obj_at_put(index, resolve_non_null(element));
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}
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/*
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* Field access
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*/
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static void write_int_field(const Handle& h_oop, fieldDescriptor* fd, jint value) {
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assert(h_oop.not_null(), "invariant");
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assert(fd != NULL, "invariant");
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h_oop->int_field_put(fd->offset(), value);
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}
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static void write_float_field(const Handle& h_oop, fieldDescriptor* fd, jfloat value) {
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assert(h_oop.not_null(), "invariant");
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assert(fd != NULL, "invariant");
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h_oop->float_field_put(fd->offset(), value);
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}
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static void write_double_field(const Handle& h_oop, fieldDescriptor* fd, jdouble value) {
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assert(h_oop.not_null(), "invariant");
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assert(fd != NULL, "invariant");
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h_oop->double_field_put(fd->offset(), value);
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}
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static void write_long_field(const Handle& h_oop, fieldDescriptor* fd, jlong value) {
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assert(h_oop.not_null(), "invariant");
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assert(fd != NULL, "invariant");
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h_oop->long_field_put(fd->offset(), value);
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}
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static void write_oop_field(const Handle& h_oop, fieldDescriptor* fd, const oop value) {
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assert(h_oop.not_null(), "invariant");
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assert(fd != NULL, "invariant");
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h_oop->obj_field_put(fd->offset(), value);
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}
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static void write_specialized_field(JfrJavaArguments* args, const Handle& h_oop, fieldDescriptor* fd, bool static_field) {
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assert(args != NULL, "invariant");
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assert(h_oop.not_null(), "invariant");
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assert(fd != NULL, "invariant");
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assert(fd->offset() > 0, "invariant");
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assert(args->length() >= 1, "invariant");
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// attempt must set a real value
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assert(args->param(1).get_type() != T_VOID, "invariant");
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switch(fd->field_type()) {
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case T_BOOLEAN:
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case T_CHAR:
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case T_SHORT:
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case T_INT:
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write_int_field(h_oop, fd, args->param(1).get_jint());
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break;
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case T_FLOAT:
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write_float_field(h_oop, fd, args->param(1).get_jfloat());
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break;
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case T_DOUBLE:
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write_double_field(h_oop, fd, args->param(1).get_jdouble());
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break;
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case T_LONG:
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write_long_field(h_oop, fd, args->param(1).get_jlong());
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break;
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case T_OBJECT:
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write_oop_field(h_oop, fd, (oop)args->param(1).get_jobject());
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break;
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case T_ADDRESS:
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write_oop_field(h_oop, fd, JfrJavaSupport::resolve_non_null(args->param(1).get_jobject()));
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break;
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default:
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ShouldNotReachHere();
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}
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}
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static void read_specialized_field(JavaValue* result, const Handle& h_oop, fieldDescriptor* fd) {
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assert(result != NULL, "invariant");
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assert(h_oop.not_null(), "invariant");
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assert(fd != NULL, "invariant");
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assert(fd->offset() > 0, "invariant");
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switch(fd->field_type()) {
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case T_BOOLEAN:
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case T_CHAR:
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case T_SHORT:
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case T_INT:
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result->set_jint(h_oop->int_field(fd->offset()));
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break;
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case T_FLOAT:
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result->set_jfloat(h_oop->float_field(fd->offset()));
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break;
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case T_DOUBLE:
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result->set_jdouble(h_oop->double_field(fd->offset()));
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break;
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case T_LONG:
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result->set_jlong(h_oop->long_field(fd->offset()));
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break;
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case T_OBJECT:
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result->set_jobject((jobject)h_oop->obj_field(fd->offset()));
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break;
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default:
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ShouldNotReachHere();
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}
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}
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365 |
static bool find_field(InstanceKlass* ik,
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Symbol* name_symbol,
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Symbol* signature_symbol,
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fieldDescriptor* fd,
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bool is_static = false,
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bool allow_super = false) {
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if (allow_super || is_static) {
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return ik->find_field(name_symbol, signature_symbol, is_static, fd) != NULL;
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}
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return ik->find_local_field(name_symbol, signature_symbol, fd);
|
|
375 |
}
|
|
376 |
|
|
377 |
static void lookup_field(JfrJavaArguments* args, InstanceKlass* klass, fieldDescriptor* fd, bool static_field) {
|
|
378 |
assert(args != NULL, "invariant");
|
|
379 |
assert(klass != NULL, "invariant");
|
|
380 |
assert(klass->is_initialized(), "invariant");
|
|
381 |
assert(fd != NULL, "invariant");
|
|
382 |
find_field(klass, args->name(), args->signature(), fd, static_field, true);
|
|
383 |
}
|
|
384 |
|
|
385 |
static void read_field(JfrJavaArguments* args, JavaValue* result, TRAPS) {
|
|
386 |
assert(args != NULL, "invariant");
|
|
387 |
assert(result != NULL, "invariant");
|
|
388 |
DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(THREAD));
|
|
389 |
|
|
390 |
InstanceKlass* const klass = static_cast<InstanceKlass*>(args->klass());
|
|
391 |
klass->initialize(CHECK);
|
|
392 |
const bool static_field = !args->has_receiver();
|
|
393 |
fieldDescriptor fd;
|
|
394 |
lookup_field(args, klass, &fd, static_field);
|
|
395 |
assert(fd.offset() > 0, "invariant");
|
|
396 |
|
|
397 |
HandleMark hm(THREAD);
|
|
398 |
Handle h_oop(static_field ? Handle(THREAD, klass->java_mirror()) : Handle(THREAD, args->receiver()));
|
|
399 |
read_specialized_field(result, h_oop, &fd);
|
|
400 |
}
|
|
401 |
|
|
402 |
static void write_field(JfrJavaArguments* args, JavaValue* result, TRAPS) {
|
|
403 |
assert(args != NULL, "invariant");
|
|
404 |
assert(result != NULL, "invariant");
|
|
405 |
DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(THREAD));
|
|
406 |
|
|
407 |
InstanceKlass* const klass = static_cast<InstanceKlass*>(args->klass());
|
|
408 |
klass->initialize(CHECK);
|
|
409 |
|
|
410 |
const bool static_field = !args->has_receiver();
|
|
411 |
fieldDescriptor fd;
|
|
412 |
lookup_field(args, klass, &fd, static_field);
|
|
413 |
assert(fd.offset() > 0, "invariant");
|
|
414 |
|
|
415 |
HandleMark hm(THREAD);
|
|
416 |
Handle h_oop(static_field ? Handle(THREAD, klass->java_mirror()) : Handle(THREAD, args->receiver()));
|
|
417 |
write_specialized_field(args, h_oop, &fd, static_field);
|
|
418 |
}
|
|
419 |
|
|
420 |
void JfrJavaSupport::set_field(JfrJavaArguments* args, TRAPS) {
|
|
421 |
assert(args != NULL, "invariant");
|
|
422 |
write_field(args, args->result(), THREAD);
|
|
423 |
}
|
|
424 |
|
|
425 |
void JfrJavaSupport::get_field(JfrJavaArguments* args, TRAPS) {
|
|
426 |
assert(args != NULL, "invariant");
|
|
427 |
read_field(args, args->result(), THREAD);
|
|
428 |
}
|
|
429 |
|
|
430 |
void JfrJavaSupport::get_field_local_ref(JfrJavaArguments* args, TRAPS) {
|
|
431 |
assert(args != NULL, "invariant");
|
|
432 |
DEBUG_ONLY(check_java_thread_in_vm(THREAD));
|
|
433 |
|
|
434 |
JavaValue* const result = args->result();
|
|
435 |
assert(result != NULL, "invariant");
|
|
436 |
assert(result->get_type() == T_OBJECT, "invariant");
|
|
437 |
|
|
438 |
read_field(args, result, CHECK);
|
|
439 |
const oop obj = (const oop)result->get_jobject();
|
|
440 |
|
|
441 |
if (obj != NULL) {
|
|
442 |
result->set_jobject(local_jni_handle(obj, THREAD));
|
|
443 |
}
|
|
444 |
}
|
|
445 |
|
|
446 |
void JfrJavaSupport::get_field_global_ref(JfrJavaArguments* args, TRAPS) {
|
|
447 |
assert(args != NULL, "invariant");
|
|
448 |
DEBUG_ONLY(check_java_thread_in_vm(THREAD));
|
|
449 |
|
|
450 |
JavaValue* const result = args->result();
|
|
451 |
assert(result != NULL, "invariant");
|
|
452 |
assert(result->get_type() == T_OBJECT, "invariant");
|
|
453 |
read_field(args, result, CHECK);
|
|
454 |
const oop obj = (const oop)result->get_jobject();
|
|
455 |
if (obj != NULL) {
|
|
456 |
result->set_jobject(global_jni_handle(obj, THREAD));
|
|
457 |
}
|
|
458 |
}
|
|
459 |
|
|
460 |
/*
|
|
461 |
* Misc
|
|
462 |
*/
|
|
463 |
Klass* JfrJavaSupport::klass(const jobject handle) {
|
|
464 |
const oop obj = resolve_non_null(handle);
|
|
465 |
assert(obj != NULL, "invariant");
|
|
466 |
return obj->klass();
|
|
467 |
}
|
|
468 |
|
|
469 |
// caller needs ResourceMark
|
|
470 |
const char* JfrJavaSupport::c_str(jstring string, Thread* t) {
|
|
471 |
DEBUG_ONLY(check_java_thread_in_vm(t));
|
|
472 |
if (string == NULL) {
|
|
473 |
return NULL;
|
|
474 |
}
|
|
475 |
const char* temp = NULL;
|
|
476 |
const oop java_string = resolve_non_null(string);
|
|
477 |
if (java_lang_String::value(java_string) != NULL) {
|
|
478 |
const size_t length = java_lang_String::utf8_length(java_string);
|
|
479 |
temp = NEW_RESOURCE_ARRAY_IN_THREAD(t, const char, (length + 1));
|
|
480 |
if (temp == NULL) {
|
|
481 |
JfrJavaSupport::throw_out_of_memory_error("Unable to allocate thread local native memory", t);
|
|
482 |
return NULL;
|
|
483 |
}
|
|
484 |
assert(temp != NULL, "invariant");
|
|
485 |
java_lang_String::as_utf8_string(java_string, const_cast<char*>(temp), (int) length + 1);
|
|
486 |
}
|
|
487 |
return temp;
|
|
488 |
}
|
|
489 |
|
|
490 |
/*
|
|
491 |
* Exceptions and errors
|
|
492 |
*/
|
|
493 |
static void create_and_throw(Symbol* name, const char* message, TRAPS) {
|
|
494 |
assert(name != NULL, "invariant");
|
|
495 |
DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(THREAD));
|
|
496 |
assert(!HAS_PENDING_EXCEPTION, "invariant");
|
|
497 |
THROW_MSG(name, message);
|
|
498 |
}
|
|
499 |
|
|
500 |
void JfrJavaSupport::throw_illegal_state_exception(const char* message, TRAPS) {
|
|
501 |
create_and_throw(vmSymbols::java_lang_IllegalStateException(), message, THREAD);
|
|
502 |
}
|
|
503 |
|
|
504 |
void JfrJavaSupport::throw_internal_error(const char* message, TRAPS) {
|
|
505 |
create_and_throw(vmSymbols::java_lang_InternalError(), message, THREAD);
|
|
506 |
}
|
|
507 |
|
|
508 |
void JfrJavaSupport::throw_illegal_argument_exception(const char* message, TRAPS) {
|
|
509 |
create_and_throw(vmSymbols::java_lang_IllegalArgumentException(), message, THREAD);
|
|
510 |
}
|
|
511 |
|
|
512 |
void JfrJavaSupport::throw_out_of_memory_error(const char* message, TRAPS) {
|
|
513 |
create_and_throw(vmSymbols::java_lang_OutOfMemoryError(), message, THREAD);
|
|
514 |
}
|
|
515 |
|
|
516 |
void JfrJavaSupport::throw_class_format_error(const char* message, TRAPS) {
|
|
517 |
create_and_throw(vmSymbols::java_lang_ClassFormatError(), message, THREAD);
|
|
518 |
}
|
|
519 |
|
|
520 |
void JfrJavaSupport::abort(jstring errorMsg, Thread* t) {
|
|
521 |
DEBUG_ONLY(check_java_thread_in_vm(t));
|
|
522 |
|
|
523 |
ResourceMark rm(t);
|
|
524 |
const char* const error_msg = c_str(errorMsg, t);
|
|
525 |
if (error_msg != NULL) {
|
|
526 |
log_error(jfr, system)("%s",error_msg);
|
|
527 |
}
|
|
528 |
log_error(jfr, system)("%s", "An irrecoverable error in Jfr. Shutting down VM...");
|
|
529 |
vm_abort();
|
|
530 |
}
|
|
531 |
|
|
532 |
JfrJavaSupport::CAUSE JfrJavaSupport::_cause = JfrJavaSupport::VM_ERROR;
|
|
533 |
void JfrJavaSupport::set_cause(jthrowable throwable, Thread* t) {
|
|
534 |
DEBUG_ONLY(check_java_thread_in_vm(t));
|
|
535 |
|
|
536 |
HandleMark hm(t);
|
|
537 |
Handle ex(t, JNIHandles::resolve_external_guard(throwable));
|
|
538 |
|
|
539 |
if (ex.is_null()) {
|
|
540 |
return;
|
|
541 |
}
|
|
542 |
|
|
543 |
if (ex->is_a(SystemDictionary::OutOfMemoryError_klass())) {
|
|
544 |
_cause = OUT_OF_MEMORY;
|
|
545 |
return;
|
|
546 |
}
|
|
547 |
if (ex->is_a(SystemDictionary::StackOverflowError_klass())) {
|
|
548 |
_cause = STACK_OVERFLOW;
|
|
549 |
return;
|
|
550 |
}
|
|
551 |
if (ex->is_a(SystemDictionary::Error_klass())) {
|
|
552 |
_cause = VM_ERROR;
|
|
553 |
return;
|
|
554 |
}
|
|
555 |
if (ex->is_a(SystemDictionary::RuntimeException_klass())) {
|
|
556 |
_cause = RUNTIME_EXCEPTION;
|
|
557 |
return;
|
|
558 |
}
|
|
559 |
if (ex->is_a(SystemDictionary::Exception_klass())) {
|
|
560 |
_cause = UNKNOWN;
|
|
561 |
return;
|
|
562 |
}
|
|
563 |
}
|
|
564 |
|
|
565 |
void JfrJavaSupport::uncaught_exception(jthrowable throwable, Thread* t) {
|
|
566 |
DEBUG_ONLY(check_java_thread_in_vm(t));
|
|
567 |
assert(throwable != NULL, "invariant");
|
|
568 |
set_cause(throwable, t);
|
|
569 |
}
|
|
570 |
|
|
571 |
JfrJavaSupport::CAUSE JfrJavaSupport::cause() {
|
|
572 |
return _cause;
|
|
573 |
}
|
|
574 |
|
|
575 |
const char* const JDK_JFR_MODULE_NAME = "jdk.jfr";
|
|
576 |
const char* const JDK_JFR_PACKAGE_NAME = "jdk/jfr";
|
|
577 |
|
|
578 |
static bool is_jdk_jfr_module_in_readability_graph() {
|
|
579 |
Thread* const t = Thread::current();
|
|
580 |
// take one of the packages in the module to be located and query for its definition.
|
|
581 |
TempNewSymbol pkg_sym = SymbolTable::new_symbol(JDK_JFR_PACKAGE_NAME, t);
|
|
582 |
return Modules::is_package_defined(pkg_sym, Handle(), t);
|
|
583 |
}
|
|
584 |
|
|
585 |
static void print_module_resolution_error(outputStream* stream) {
|
|
586 |
assert(stream != NULL, "invariant");
|
|
587 |
stream->print_cr("%s not found.", JDK_JFR_MODULE_NAME);
|
|
588 |
stream->print_cr("Flight Recorder can not be enabled.");
|
|
589 |
stream->print_cr("To use Flight Recorder, you might need to add" \
|
|
590 |
" \"--add-modules %s\" to the VM command-line options.", JDK_JFR_MODULE_NAME);
|
|
591 |
}
|
|
592 |
|
|
593 |
bool JfrJavaSupport::is_jdk_jfr_module_available() {
|
|
594 |
return is_jdk_jfr_module_in_readability_graph();
|
|
595 |
}
|
|
596 |
|
|
597 |
bool JfrJavaSupport::is_jdk_jfr_module_available(outputStream* stream, TRAPS) {
|
|
598 |
if (!JfrJavaSupport::is_jdk_jfr_module_available()) {
|
|
599 |
if (stream != NULL) {
|
|
600 |
print_module_resolution_error(stream);
|
|
601 |
}
|
|
602 |
return false;
|
|
603 |
}
|
|
604 |
return true;
|
|
605 |
}
|
|
606 |
|
|
607 |
jlong JfrJavaSupport::jfr_thread_id(jobject target_thread) {
|
|
608 |
ThreadsListHandle tlh;
|
|
609 |
JavaThread* native_thread = NULL;
|
|
610 |
(void)tlh.cv_internal_thread_to_JavaThread(target_thread, &native_thread, NULL);
|
|
611 |
return native_thread != NULL ? JFR_THREAD_ID(native_thread) : 0;
|
|
612 |
}
|