1 /*

     2  * Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    24 

    25 #include "precompiled.hpp"

    26 #include "jfr/periodic/jfrThreadCPULoadEvent.hpp"

    27 #include "jfr/jni/jfrJavaSupport.hpp"

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

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

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

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

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

    33 #include "jfr/support/jfrThreadLocal.hpp"

    34 #include "memory/allocation.inline.hpp"

    35 #include "runtime/os.hpp"

    36 #include "runtime/thread.inline.hpp"

    37 

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

    39 JfrThreadLocal::JfrThreadLocal() :

    40   _java_event_writer(NULL),

    41   _java_buffer(NULL),

    42   _native_buffer(NULL),

    43   _shelved_buffer(NULL),

    44   _stackframes(NULL),

    45   _trace_id(JfrTraceId::assign_thread_id()),

    46   _thread_cp(),

    47   _data_lost(0),

    48   _stack_trace_id(max_julong),

    49   _user_time(0),

    50   _cpu_time(0),

    51   _wallclock_time(os::javaTimeNanos()),

    52   _stack_trace_hash(0),

    53   _stackdepth(0),

    54   _entering_suspend_flag(0) {}

    55 

    56 u8 JfrThreadLocal::add_data_lost(u8 value) {

    57   _data_lost += value;

    58   return _data_lost;

    59 }

    60 

    61 bool JfrThreadLocal::has_thread_checkpoint() const {

    62   return _thread_cp.valid();

    63 }

    64 

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

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

    67   _thread_cp = ref;

    68 }

    69 

    70 const JfrCheckpointBlobHandle& JfrThreadLocal::thread_checkpoint() const {

    71   return _thread_cp;

    72 }

    73 

    74 void JfrThreadLocal::on_exit(JavaThread* thread) {

    75   JfrCheckpointManager::write_thread_checkpoint(thread);

    76   JfrThreadCPULoadEvent::send_event_for_thread(thread);

    77 }

    78 

    79 void JfrThreadLocal::on_destruct(Thread* thread) {

    80   JfrThreadLocal* const tl = thread->jfr_thread_local();

    81   if (tl->has_native_buffer()) {

    82     release(tl->native_buffer(), thread);

    83   }

    84   if (tl->has_java_buffer()) {

    85     release(tl->java_buffer(), thread);

    86   }

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

    88   if (thread->jfr_thread_local()->has_java_event_writer()) {

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

    90   }

    91   destroy_stackframes(thread);

    92 }

    93 

    94 JfrBuffer* JfrThreadLocal::acquire(Thread* thread, size_t size) {

    95   return JfrStorage::acquire_thread_local(thread, size);

    96 }

    97 

    98 void JfrThreadLocal::release(JfrBuffer* buffer, Thread* thread) {

    99   assert(buffer != NULL, "invariant");

   100   JfrStorage::release_thread_local(buffer, thread);

   101 }

   102 

   103 JfrBuffer* JfrThreadLocal::install_native_buffer() const {

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

   105   _native_buffer = acquire(Thread::current());

   106   return _native_buffer;

   107 }

   108 

   109 JfrBuffer* JfrThreadLocal::install_java_buffer() const {

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

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

   112   _java_buffer = acquire(Thread::current());

   113   return _java_buffer;

   114 }

   115 

   116 JfrStackFrame* JfrThreadLocal::install_stackframes() const {

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

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

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

   120   _stackframes = NEW_C_HEAP_ARRAY(JfrStackFrame, _stackdepth, mtTracing);

   121   return _stackframes;

   122 }

   123 

   124 void JfrThreadLocal::destroy_stackframes(Thread* thread) {

   125   assert(thread != NULL, "invariant");

   126   JfrStackFrame* frames = thread->jfr_thread_local()->stackframes();

   127   if (frames != NULL) {

   128     FREE_C_HEAP_ARRAY(JfrStackFrame, frames);

   129     thread->jfr_thread_local()->set_stackframes(NULL);

   130   }

   131 }