/*
* Copyright (c) 2012, 2019, 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 "jfr/recorder/jfrRecorder.hpp"
#include "jfr/recorder/service/jfrPostBox.hpp"
#include "jfr/recorder/service/jfrRecorderService.hpp"
#include "jfr/recorder/service/jfrRecorderThread.hpp"
#include "logging/log.hpp"
#include "runtime/mutexLocker.hpp"
#include "runtime/thread.inline.hpp"
//
// Entry point for "JFR Recorder Thread" message loop.
// The recorder thread executes service requests collected from the message system.
//
void recorderthread_entry(JavaThread* thread, Thread* unused) {
assert(thread != NULL, "invariant");
#define START (msgs & (MSGBIT(MSG_START)))
#define SHUTDOWN (msgs & MSGBIT(MSG_SHUTDOWN))
#define ROTATE (msgs & (MSGBIT(MSG_ROTATE)|MSGBIT(MSG_STOP)))
#define FLUSHPOINT (msgs & (MSGBIT(MSG_FLUSHPOINT)))
#define PROCESS_FULL_BUFFERS (msgs & (MSGBIT(MSG_ROTATE)|MSGBIT(MSG_STOP)|MSGBIT(MSG_FULLBUFFER)))
#define SCAVENGE (msgs & (MSGBIT(MSG_DEADBUFFER)))
JfrPostBox& post_box = JfrRecorderThread::post_box();
log_debug(jfr, system)("Recorder thread STARTED");
{
bool done = false;
int msgs = 0;
JfrRecorderService service;
MutexLocker msg_lock(JfrMsg_lock);
// JFR MESSAGE LOOP PROCESSING - BEGIN
while (!done) {
if (post_box.is_empty()) {
JfrMsg_lock->wait();
}
msgs = post_box.collect();
JfrMsg_lock->unlock();
if (PROCESS_FULL_BUFFERS) {
service.process_full_buffers();
}
if (SCAVENGE) {
service.scavenge();
}
// Check amount of data written to chunk already
// if it warrants asking for a new chunk
service.evaluate_chunk_size_for_rotation();
if (START) {
service.start();
} else if (ROTATE) {
service.rotate(msgs);
} else if (FLUSHPOINT) {
service.flushpoint();
}
JfrMsg_lock->lock();
post_box.notify_waiters();
if (SHUTDOWN) {
log_debug(jfr, system)("Request to STOP recorder");
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