1 /*

     2  * Copyright (c) 2014, 2015, 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 "gc/g1/g1CollectedHeap.inline.hpp"

    27 #include "gc/g1/g1OopClosures.inline.hpp"

    28 #include "gc/g1/g1ParScanThreadState.hpp"

    29 #include "gc/g1/g1_specialized_oop_closures.hpp"

    30 #include "memory/iterator.inline.hpp"

    31 #include "utilities/stack.inline.hpp"

    32 

    33 G1ParCopyHelper::G1ParCopyHelper(G1CollectedHeap* g1,  G1ParScanThreadState* par_scan_state) :

    34   G1ParClosureSuper(g1, par_scan_state), _scanned_klass(NULL),

    35   _cm(_g1->concurrent_mark()) {}

    36 

    37 G1ParClosureSuper::G1ParClosureSuper(G1CollectedHeap* g1) :

    38   _g1(g1), _par_scan_state(NULL), _worker_id(UINT_MAX) { }

    39 

    40 G1ParClosureSuper::G1ParClosureSuper(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state) :

    41   _g1(g1), _par_scan_state(NULL),

    42   _worker_id(UINT_MAX) {

    43   set_par_scan_thread_state(par_scan_state);

    44 }

    45 

    46 void G1ParClosureSuper::set_par_scan_thread_state(G1ParScanThreadState* par_scan_state) {

    47   assert(_par_scan_state == NULL, "_par_scan_state must only be set once");

    48   assert(par_scan_state != NULL, "Must set par_scan_state to non-NULL.");

    49 

    50   _par_scan_state = par_scan_state;

    51   _worker_id = par_scan_state->queue_num();

    52 

    53   assert(_worker_id < MAX2((uint)ParallelGCThreads, 1u),

    54          err_msg("The given worker id %u must be less than the number of threads %u", _worker_id, MAX2((uint)ParallelGCThreads, 1u)));

    55 }

    56 

    57 // Generate G1 specialized oop_oop_iterate functions.

    58 SPECIALIZED_OOP_OOP_ITERATE_CLOSURES_G1(ALL_KLASS_OOP_OOP_ITERATE_DEFN)