--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/jfr/recorder/service/jfrRecorderThread.cpp	Tue May 15 20:24:34 2018 +0200
@@ -0,0 +1,117 @@
+/*
+ * Copyright (c) 2012, 2018, 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 "jni.h"
+#include "classfile/javaClasses.hpp"
+#include "classfile/symbolTable.hpp"
+#include "classfile/systemDictionary.hpp"
+#include "jfr/jni/jfrJavaSupport.hpp"
+#include "jfr/recorder/jfrRecorder.hpp"
+#include "jfr/recorder/checkpoint/jfrCheckpointManager.hpp"
+#include "jfr/recorder/service/jfrRecorderThread.hpp"
+#include "memory/resourceArea.hpp"
+#include "runtime/handles.inline.hpp"
+#include "runtime/mutexLocker.hpp"
+#include "runtime/thread.inline.hpp"
+#include "utilities/preserveException.hpp"
+#include "utilities/macros.hpp"
+
+static Thread* start_thread(instanceHandle thread_oop, ThreadFunction proc, TRAPS) {
+  assert(thread_oop.not_null(), "invariant");
+  assert(proc != NULL, "invariant");
+
+  bool allocation_failed = false;
+  JavaThread* new_thread = NULL;
+  {
+    MutexLocker mu(Threads_lock);
+    new_thread = new JavaThread(proc);
+    // At this point it may be possible that no
+    // osthread was created for the JavaThread due to lack of memory.
+    if (new_thread == NULL || new_thread->osthread() == NULL) {
+      delete new_thread;
+      allocation_failed = true;
+    } else {
+      java_lang_Thread::set_thread(thread_oop(), new_thread);
+      java_lang_Thread::set_priority(thread_oop(), NormPriority);
+      java_lang_Thread::set_daemon(thread_oop());
+      new_thread->set_threadObj(thread_oop());
+      Threads::add(new_thread);
+    }
+  }
+  if (allocation_failed) {
+    JfrJavaSupport::throw_out_of_memory_error("Unable to create native recording thread for JFR", CHECK_NULL);
+  }
+
+  Thread::start(new_thread);
+  return new_thread;
+}
+
+JfrPostBox* JfrRecorderThread::_post_box = NULL;
+
+JfrPostBox& JfrRecorderThread::post_box() {
+  return *_post_box;
+}
+
+// defined in JfrRecorderThreadLoop.cpp
+void recorderthread_entry(JavaThread*, Thread*);
+
+bool JfrRecorderThread::start(JfrCheckpointManager* cp_manager, JfrPostBox* post_box, TRAPS) {
+  assert(cp_manager != NULL, "invariant");
+  assert(post_box != NULL, "invariant");
+  _post_box = post_box;
+
+  static const char klass[] = "jdk/jfr/internal/JVMUpcalls";
+  static const char method[] = "createRecorderThread";
+  static const char signature[] = "(Ljava/lang/ThreadGroup;Ljava/lang/ClassLoader;)Ljava/lang/Thread;";
+
+  JavaValue result(T_OBJECT);
+  JfrJavaArguments create_thread_args(&result, klass, method, signature, CHECK_false);
+
+  // arguments
+  create_thread_args.push_oop(Universe::system_thread_group());
+  create_thread_args.push_oop(SystemDictionary::java_system_loader());
+
+  JfrJavaSupport::call_static(&create_thread_args, CHECK_false);
+  instanceHandle h_thread_oop(THREAD, (instanceOop)result.get_jobject());
+  assert(h_thread_oop.not_null(), "invariant");
+  // attempt thread start
+  const Thread* const t = start_thread(h_thread_oop, recorderthread_entry,THREAD);
+  if (!HAS_PENDING_EXCEPTION) {
+    cp_manager->register_service_thread(t);
+    return true;
+  }
+  assert(HAS_PENDING_EXCEPTION, "invariant");
+  // Start failed, remove the thread from the system thread group
+  JavaValue void_result(T_VOID);
+  JfrJavaArguments remove_thread_args(&void_result);
+  remove_thread_args.set_klass(SystemDictionary::ThreadGroup_klass());
+  remove_thread_args.set_name(vmSymbols::remove_method_name());
+  remove_thread_args.set_signature(vmSymbols::thread_void_signature());
+  remove_thread_args.set_receiver(Universe::system_thread_group());
+  remove_thread_args.push_oop(h_thread_oop());
+  CautiouslyPreserveExceptionMark cpe(THREAD);
+  JfrJavaSupport::call_special(&remove_thread_args, THREAD);
+  return false;
+}