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 /*

  * 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.

  *

  */

 #ifndef SHARE_VM_JFR_SUPPORT_JFRTHREADLOCAL_HPP

 #define SHARE_VM_JFR_SUPPORT_JFRTHREADLOCAL_HPP

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

 #include "jfr/utilities/jfrTypes.hpp"

 #include "utilities/sizes.hpp"

 class JavaThread;

 class JfrBuffer;

 class JfrStackFrame;

 class JfrThreadLocal {

  private:

   jobject _java_event_writer;

   mutable JfrBuffer* _java_buffer;

   mutable JfrBuffer* _native_buffer;

   JfrBuffer* _shelved_buffer;

   mutable JfrStackFrame* _stackframes;

   mutable traceid _trace_id;

   JfrCheckpointBlobHandle _thread_cp;

   u8 _data_lost;

   traceid _stack_trace_id;

   jlong _user_time;

   jlong _cpu_time;

   jlong _wallclock_time;

   unsigned int _stack_trace_hash;

   mutable u4 _stackdepth;

   volatile jint _entering_suspend_flag;

   bool _dead;

   JfrBuffer* install_native_buffer() const;

   JfrBuffer* install_java_buffer() const;

   JfrStackFrame* install_stackframes() const;

   void set_dead();

  public:

   JfrThreadLocal();

   JfrBuffer* native_buffer() const {

     return _native_buffer != NULL ? _native_buffer : install_native_buffer();

   }

   bool has_native_buffer() const {

     return _native_buffer != NULL;

   }

   void set_native_buffer(JfrBuffer* buffer) {

     _native_buffer = buffer;

   }

   JfrBuffer* java_buffer() const {

     return _java_buffer != NULL ? _java_buffer : install_java_buffer();

   }

   bool has_java_buffer() const {

     return _java_buffer != NULL;

   }

   void set_java_buffer(JfrBuffer* buffer) {

     _java_buffer = buffer;

   }

   JfrBuffer* shelved_buffer() const {

     return _shelved_buffer;

   }

   void shelve_buffer(JfrBuffer* buffer) {

     _shelved_buffer = buffer;

   }

   bool has_java_event_writer() const {

     return _java_event_writer != NULL;

   }

   jobject java_event_writer() {

     return _java_event_writer;

   }

   void set_java_event_writer(jobject java_event_writer) {

     _java_event_writer = java_event_writer;

   }

   JfrStackFrame* stackframes() const {

     return _stackframes != NULL ? _stackframes : install_stackframes();

   }

   void set_stackframes(JfrStackFrame* frames) {

     _stackframes = frames;

   }

   u4 stackdepth() const {

     return _stackdepth;

   }

   void set_stackdepth(u4 depth) {

     _stackdepth = depth;

   }

   traceid thread_id() const {

     return _trace_id;

   }

   void set_thread_id(traceid thread_id) {

     _trace_id = thread_id;

   }

   void set_cached_stack_trace_id(traceid id, unsigned int hash = 0) {

     _stack_trace_id = id;

     _stack_trace_hash = hash;

   }

   bool has_cached_stack_trace() const {

     return _stack_trace_id != max_julong;

   }

   void clear_cached_stack_trace() {

     _stack_trace_id = max_julong;

     _stack_trace_hash = 0;

   }

   traceid cached_stack_trace_id() const {

     return _stack_trace_id;

   }

   unsigned int cached_stack_trace_hash() const {

     return _stack_trace_hash;

   }

   void set_trace_block() {

     _entering_suspend_flag = 1;

   }

   void clear_trace_block() {

     _entering_suspend_flag = 0;

   }

   bool is_trace_block() const {

     return _entering_suspend_flag != 0;

   }

   u8 data_lost() const {

     return _data_lost;

   }

   u8 add_data_lost(u8 value);

   jlong get_user_time() const {

     return _user_time;

   }

   void set_user_time(jlong user_time) {

     _user_time = user_time;

   }

   jlong get_cpu_time() const {

     return _cpu_time;

   }

   void set_cpu_time(jlong cpu_time) {

     _cpu_time = cpu_time;

   }

   jlong get_wallclock_time() const {

     return _wallclock_time;

   }

   void set_wallclock_time(jlong wallclock_time) {

     _wallclock_time = wallclock_time;

   }

   traceid trace_id() const {

     return _trace_id;

   }

   traceid* const trace_id_addr() const {

     return &_trace_id;

   }

   void set_trace_id(traceid id) const {

     _trace_id = id;

   }

   bool is_dead() const {

     return _dead;

   }

   bool has_thread_checkpoint() const;

   void set_thread_checkpoint(const JfrCheckpointBlobHandle& handle);

   const JfrCheckpointBlobHandle& thread_checkpoint() const;

   static JfrBuffer* acquire(Thread* t, size_t size = 0);

   static void release(JfrBuffer* buffer, Thread* t);

   static void destroy_stackframes(Thread* t);

   static void on_exit(JavaThread* t);

   static void on_destruct(Thread* t);

   // Code generation

   static ByteSize trace_id_offset() {

     return in_ByteSize(offset_of(JfrThreadLocal, _trace_id));

   }

   static ByteSize java_event_writer_offset() {

     return in_ByteSize(offset_of(JfrThreadLocal, _java_event_writer));

   }

 };

 #endif // SHARE_VM_JFR_SUPPORT_JFRTHREADLOCAL_HPP