Mercurial > jdk8-mips64-public > hotspot / file revision

 /*

  * 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 "jfr/jfrEvents.hpp"

 #include "jfr/jni/jfrJavaSupport.hpp"

 #include "jfr/periodic/jfrThreadCPULoadEvent.hpp"

 #include "jfr/recorder/jfrRecorder.hpp"

 #include "jfr/recorder/checkpoint/jfrCheckpointManager.hpp"

 #include "jfr/recorder/checkpoint/types/traceid/jfrTraceId.inline.hpp"

 #include "jfr/recorder/service/jfrOptionSet.hpp"

 #include "jfr/recorder/storage/jfrStorage.hpp"

 #include "jfr/recorder/stacktrace/jfrStackTraceRepository.hpp"

 #include "jfr/support/jfrThreadLocal.hpp"

 #include "memory/allocation.inline.hpp"

 #include "runtime/os.hpp"

 #include "runtime/thread.inline.hpp"

 #include "utilities/sizes.hpp"

 /* This data structure is per thread and only accessed by the thread itself, no locking required */

 JfrThreadLocal::JfrThreadLocal() :

   _java_event_writer(NULL),

   _java_buffer(NULL),

   _native_buffer(NULL),

   _shelved_buffer(NULL),

   _stackframes(NULL),

   _trace_id(JfrTraceId::assign_thread_id()),

   _thread_cp(),

   _data_lost(0),

   _stack_trace_id(max_julong),

   _user_time(0),

   _cpu_time(0),

   _wallclock_time(os::javaTimeNanos()),

   _stack_trace_hash(0),

   _stackdepth(0),

   _entering_suspend_flag(0),

   _dead(false) {}

 u8 JfrThreadLocal::add_data_lost(u8 value) {

   _data_lost += value;

   return _data_lost;

 }

 bool JfrThreadLocal::has_thread_checkpoint() const {

   return _thread_cp.valid();

 }

 void JfrThreadLocal::set_thread_checkpoint(const JfrCheckpointBlobHandle& ref) {

   assert(!_thread_cp.valid(), "invariant");

   _thread_cp = ref;

 }

 const JfrCheckpointBlobHandle& JfrThreadLocal::thread_checkpoint() const {

   return _thread_cp;

 }

 static void send_java_thread_start_event(JavaThread* jt) {

   EventThreadStart event;

   event.set_thread(jt->jfr_thread_local()->thread_id());

   event.commit();

 }

 void JfrThreadLocal::on_start(Thread* t) {

   assert(t != NULL, "invariant");

   assert(Thread::current() == t, "invariant");

   if (JfrRecorder::is_recording()) {

     if (t->is_Java_thread()) {

       send_java_thread_start_event((JavaThread*)t);

     }

   }

 }

 static void send_java_thread_end_events(traceid id, JavaThread* jt) {

   assert(jt != NULL, "invariant");

   assert(Thread::current() == jt, "invariant");

   assert(jt->jfr_thread_local()->trace_id() == id, "invariant");

   EventThreadEnd event;

   event.set_thread(id);

   event.commit();

   JfrThreadCPULoadEvent::send_event_for_thread(jt);

 }

 void JfrThreadLocal::release(JfrThreadLocal* tl, Thread* t) {

   assert(tl != NULL, "invariant");

   assert(t != NULL, "invariant");

   assert(Thread::current() == t, "invariant");

   assert(!tl->is_dead(), "invariant");

   assert(tl->shelved_buffer() == NULL, "invariant");

   if (tl->has_native_buffer()) {

     JfrStorage::release_thread_local(tl->native_buffer(), t);

   }

   if (tl->has_java_buffer()) {

     JfrStorage::release_thread_local(tl->java_buffer(), t);

   }

   if (tl->has_java_event_writer()) {

     assert(t->is_Java_thread(), "invariant");

     JfrJavaSupport::destroy_global_jni_handle(tl->java_event_writer());

   }

   if (tl->_stackframes != NULL) {

     FREE_C_HEAP_ARRAY(JfrStackFrame, tl->_stackframes, mtTracing);

   }

   tl->_dead = true;

 }

 void JfrThreadLocal::on_exit(Thread* t) {

   assert(t != NULL, "invariant");

   JfrThreadLocal * const tl = t->jfr_thread_local();

   assert(!tl->is_dead(), "invariant");

   if (JfrRecorder::is_recording()) {

     if (t->is_Java_thread()) {

       send_java_thread_end_events(tl->thread_id(), (JavaThread*)t);

     }

   }

   release(tl, Thread::current()); // because it could be that Thread::current() != t

 }

 JfrBuffer* JfrThreadLocal::install_native_buffer() const {

   assert(!has_native_buffer(), "invariant");

   _native_buffer = JfrStorage::acquire_thread_local(Thread::current());

   return _native_buffer;

 }

 JfrBuffer* JfrThreadLocal::install_java_buffer() const {

   assert(!has_java_buffer(), "invariant");

   assert(!has_java_event_writer(), "invariant");

   _java_buffer = JfrStorage::acquire_thread_local(Thread::current());

   return _java_buffer;

 }

 JfrStackFrame* JfrThreadLocal::install_stackframes() const {

   assert(_stackframes == NULL, "invariant");

   _stackdepth = (u4)JfrOptionSet::stackdepth();

   guarantee(_stackdepth > 0, "Stackdepth must be > 0");

   _stackframes = NEW_C_HEAP_ARRAY(JfrStackFrame, _stackdepth, mtTracing);

   return _stackframes;

 }

 ByteSize JfrThreadLocal::trace_id_offset() {

   return in_ByteSize(offset_of(JfrThreadLocal, _trace_id));

 }

 ByteSize JfrThreadLocal::java_event_writer_offset() {

   return in_ByteSize(offset_of(JfrThreadLocal, _java_event_writer));

 }