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/*
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* Copyright (c) 2012, 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.hpp"
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#include "classfile/symbolTable.hpp"
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#include "classfile/systemDictionary.hpp"
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#include "jfr/jni/jfrJavaSupport.hpp"
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#include "jfr/recorder/jfrRecorder.hpp"
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#include "jfr/recorder/checkpoint/jfrCheckpointManager.hpp"
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#include "jfr/recorder/service/jfrRecorderThread.hpp"
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#include "memory/resourceArea.hpp"
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54786
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#include "memory/universe.hpp"
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#include "runtime/handles.inline.hpp"
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#include "runtime/mutexLocker.hpp"
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#include "runtime/thread.inline.hpp"
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#include "utilities/preserveException.hpp"
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#include "utilities/macros.hpp"
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static Thread* start_thread(instanceHandle thread_oop, ThreadFunction proc, TRAPS) {
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assert(thread_oop.not_null(), "invariant");
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assert(proc != NULL, "invariant");
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bool allocation_failed = false;
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JavaThread* new_thread = NULL;
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{
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MutexLocker mu(Threads_lock);
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new_thread = new JavaThread(proc);
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// At this point it may be possible that no
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// osthread was created for the JavaThread due to lack of memory.
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if (new_thread == NULL || new_thread->osthread() == NULL) {
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delete new_thread;
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allocation_failed = true;
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} else {
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java_lang_Thread::set_thread(thread_oop(), new_thread);
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java_lang_Thread::set_priority(thread_oop(), NormPriority);
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java_lang_Thread::set_daemon(thread_oop());
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new_thread->set_threadObj(thread_oop());
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Threads::add(new_thread);
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}
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}
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if (allocation_failed) {
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JfrJavaSupport::throw_out_of_memory_error("Unable to create native recording thread for JFR", CHECK_NULL);
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}
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Thread::start(new_thread);
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return new_thread;
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}
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JfrPostBox* JfrRecorderThread::_post_box = NULL;
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JfrPostBox& JfrRecorderThread::post_box() {
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return *_post_box;
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}
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// defined in JfrRecorderThreadLoop.cpp
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void recorderthread_entry(JavaThread*, Thread*);
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bool JfrRecorderThread::start(JfrCheckpointManager* cp_manager, JfrPostBox* post_box, TRAPS) {
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assert(cp_manager != NULL, "invariant");
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assert(post_box != NULL, "invariant");
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_post_box = post_box;
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static const char klass[] = "jdk/jfr/internal/JVMUpcalls";
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static const char method[] = "createRecorderThread";
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static const char signature[] = "(Ljava/lang/ThreadGroup;Ljava/lang/ClassLoader;)Ljava/lang/Thread;";
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JavaValue result(T_OBJECT);
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JfrJavaArguments create_thread_args(&result, klass, method, signature, CHECK_false);
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// arguments
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create_thread_args.push_oop(Universe::system_thread_group());
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create_thread_args.push_oop(SystemDictionary::java_system_loader());
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JfrJavaSupport::call_static(&create_thread_args, CHECK_false);
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instanceHandle h_thread_oop(THREAD, (instanceOop)result.get_jobject());
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assert(h_thread_oop.not_null(), "invariant");
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// attempt thread start
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const Thread* const t = start_thread(h_thread_oop, recorderthread_entry,THREAD);
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if (!HAS_PENDING_EXCEPTION) {
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cp_manager->register_service_thread(t);
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return true;
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}
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assert(HAS_PENDING_EXCEPTION, "invariant");
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// Start failed, remove the thread from the system thread group
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JavaValue void_result(T_VOID);
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JfrJavaArguments remove_thread_args(&void_result);
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remove_thread_args.set_klass(SystemDictionary::ThreadGroup_klass());
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remove_thread_args.set_name(vmSymbols::remove_method_name());
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remove_thread_args.set_signature(vmSymbols::thread_void_signature());
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remove_thread_args.set_receiver(Universe::system_thread_group());
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remove_thread_args.push_oop(h_thread_oop());
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CautiouslyPreserveExceptionMark cpe(THREAD);
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JfrJavaSupport::call_special(&remove_thread_args, THREAD);
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return false;
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}
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