1 /*

     2  * Copyright (c) 2018, Red Hat, Inc. All rights reserved.

     3  *

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

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

     6  * published by the Free Software Foundation.

     7  *

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

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

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

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

    12  * accompanied this code).

    13  *

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

    15  * 2 along with this work; if not, write to the Free Software Foundation,

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

    17  *

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

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

    20  * questions.

    21  *

    22  */

    23 

    24 #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHTHREADLOCALDATA_HPP

    25 #define SHARE_GC_SHENANDOAH_SHENANDOAHTHREADLOCALDATA_HPP

    26 

    27 #include "gc/shared/plab.hpp"

    28 #include "gc/shenandoah/shenandoahBarrierSet.hpp"

    29 #include "gc/shenandoah/shenandoahSATBMarkQueueSet.hpp"

    30 #include "runtime/thread.hpp"

    31 #include "utilities/debug.hpp"

    32 #include "utilities/sizes.hpp"

    33 

    34 class ShenandoahThreadLocalData {

    35 public:

    36   static const uint INVALID_WORKER_ID = uint(-1);

    37 

    38 private:

    39   char _gc_state;

    40   char _oom_during_evac;

    41   ShenandoahSATBMarkQueue _satb_mark_queue;

    42   PLAB* _gclab;

    43   size_t _gclab_size;

    44   uint  _worker_id;

    45   bool _force_satb_flush;

    46 

    47   ShenandoahThreadLocalData() :

    48     _gc_state(0),

    49     _oom_during_evac(0),

    50     _satb_mark_queue(&ShenandoahBarrierSet::satb_mark_queue_set()),

    51     _gclab(NULL),

    52     _gclab_size(0),

    53     _worker_id(INVALID_WORKER_ID),

    54     _force_satb_flush(false) {

    55   }

    56 

    57   ~ShenandoahThreadLocalData() {

    58     if (_gclab != NULL) {

    59       delete _gclab;

    60     }

    61   }

    62 

    63   static ShenandoahThreadLocalData* data(Thread* thread) {

    64     assert(UseShenandoahGC, "Sanity");

    65     return thread->gc_data<ShenandoahThreadLocalData>();

    66   }

    67 

    68   static ByteSize satb_mark_queue_offset() {

    69     return Thread::gc_data_offset() + byte_offset_of(ShenandoahThreadLocalData, _satb_mark_queue);

    70   }

    71 

    72 public:

    73   static void create(Thread* thread) {

    74     new (data(thread)) ShenandoahThreadLocalData();

    75   }

    76 

    77   static void destroy(Thread* thread) {

    78     data(thread)->~ShenandoahThreadLocalData();

    79   }

    80 

    81   static SATBMarkQueue& satb_mark_queue(Thread* thread) {

    82     return data(thread)->_satb_mark_queue;

    83   }

    84 

    85   static bool is_oom_during_evac(Thread* thread) {

    86     return (data(thread)->_oom_during_evac & 1) == 1;

    87   }

    88 

    89   static void set_oom_during_evac(Thread* thread, bool oom) {

    90     if (oom) {

    91       data(thread)->_oom_during_evac |= 1;

    92     } else {

    93       data(thread)->_oom_during_evac &= ~1;

    94     }

    95   }

    96 

    97   static void set_gc_state(Thread* thread, char gc_state) {

    98     data(thread)->_gc_state = gc_state;

    99   }

   100 

   101   static char gc_state(Thread* thread) {

   102     return data(thread)->_gc_state;

   103   }

   104 

   105   static void set_worker_id(Thread* thread, uint id) {

   106     assert(thread->is_Worker_thread(), "Must be a worker thread");

   107     data(thread)->_worker_id = id;

   108   }

   109 

   110   static uint worker_id(Thread* thread) {

   111     assert(thread->is_Worker_thread(), "Must be a worker thread");

   112     return data(thread)->_worker_id;

   113   }

   114 

   115   static void set_force_satb_flush(Thread* thread, bool v) {

   116     data(thread)->_force_satb_flush = v;

   117   }

   118 

   119   static bool is_force_satb_flush(Thread* thread) {

   120     return data(thread)->_force_satb_flush;

   121   }

   122 

   123   static void initialize_gclab(Thread* thread) {

   124     assert (thread->is_Java_thread() || thread->is_Worker_thread(), "Only Java and GC worker threads are allowed to get GCLABs");

   125     data(thread)->_gclab = new PLAB(PLAB::min_size());

   126     data(thread)->_gclab_size = 0;

   127   }

   128 

   129   static PLAB* gclab(Thread* thread) {

   130     return data(thread)->_gclab;

   131   }

   132 

   133   static size_t gclab_size(Thread* thread) {

   134     return data(thread)->_gclab_size;

   135   }

   136 

   137   static void set_gclab_size(Thread* thread, size_t v) {

   138     data(thread)->_gclab_size = v;

   139   }

   140 

   141 #ifdef ASSERT

   142   static void set_evac_allowed(Thread* thread, bool evac_allowed) {

   143     if (evac_allowed) {

   144       data(thread)->_oom_during_evac |= 2;

   145     } else {

   146       data(thread)->_oom_during_evac &= ~2;

   147     }

   148   }

   149 

   150   static bool is_evac_allowed(Thread* thread) {

   151     return (data(thread)->_oom_during_evac & 2) == 2;

   152   }

   153 #endif

   154 

   155   // Offsets

   156   static ByteSize satb_mark_queue_active_offset() {

   157     return satb_mark_queue_offset() + SATBMarkQueue::byte_offset_of_active();

   158   }

   159 

   160   static ByteSize satb_mark_queue_index_offset() {

   161     return satb_mark_queue_offset() + SATBMarkQueue::byte_offset_of_index();

   162   }

   163 

   164   static ByteSize satb_mark_queue_buffer_offset() {

   165     return satb_mark_queue_offset() + SATBMarkQueue::byte_offset_of_buf();

   166   }

   167 

   168   static ByteSize gc_state_offset() {

   169     return Thread::gc_data_offset() + byte_offset_of(ShenandoahThreadLocalData, _gc_state);

   170   }

   171 

   172 };

   173 

   174 #endif // SHARE_GC_SHENANDOAH_SHENANDOAHTHREADLOCALDATA_HPP