1 /*
2 * Copyright (c) 2012, 2013, 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 *
464
465 // pending recorder queue. Recorders are queued to pending queue
466 // when they are overflowed or collected at nmt sync point.
467 static void enqueue_pending_recorder(MemRecorder* rec);
468 static MemRecorder* get_pending_recorders();
469 static void delete_all_pending_recorders();
470
471 // write a memory tracking record in recorder
472 static void write_tracking_record(address addr, MEMFLAGS type,
473 size_t size, jint seq, address pc, JavaThread* thread);
474
475 static bool is_single_threaded_bootstrap() {
476 return _state == NMT_bootstrapping_single_thread;
477 }
478
479 static void check_NMT_load(Thread* thr) {
480 assert(thr != NULL, "Sanity check");
481 if (_slowdown_calling_thread && thr != _worker_thread) {
482 #ifdef _WINDOWS
483 // On Windows, os::NakedYield() does not work as well
484 // as os::yield_all()
485 os::yield_all();
486 #else
487 // On Solaris, os::yield_all() depends on os::sleep()
488 // which requires JavaTherad in _thread_in_vm state.
489 // Transits thread to _thread_in_vm state can be dangerous
490 // if caller holds lock, as it may deadlock with Threads_lock.
491 // So use NaKedYield instead.
492 //
493 // Linux and BSD, NakedYield() and yield_all() implementations
494 // are the same.
495 os::NakedYield();
496 #endif
497 }
498 }
499
500 static void inc_pending_op_count() {
501 Atomic::inc(&_pending_op_count);
502 }
503
504 static void dec_pending_op_count() {
505 Atomic::dec(&_pending_op_count);
506 assert(_pending_op_count >= 0, "Sanity check");
507 }
508
509
510 private:
511 // retrieve a pooled memory record or create new one if there is not
512 // one available
513 static MemRecorder* get_new_or_pooled_instance();
514 static void create_memory_record(address addr, MEMFLAGS type,
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1 /*
2 * Copyright (c) 2012, 2014, 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 *
464
465 // pending recorder queue. Recorders are queued to pending queue
466 // when they are overflowed or collected at nmt sync point.
467 static void enqueue_pending_recorder(MemRecorder* rec);
468 static MemRecorder* get_pending_recorders();
469 static void delete_all_pending_recorders();
470
471 // write a memory tracking record in recorder
472 static void write_tracking_record(address addr, MEMFLAGS type,
473 size_t size, jint seq, address pc, JavaThread* thread);
474
475 static bool is_single_threaded_bootstrap() {
476 return _state == NMT_bootstrapping_single_thread;
477 }
478
479 static void check_NMT_load(Thread* thr) {
480 assert(thr != NULL, "Sanity check");
481 if (_slowdown_calling_thread && thr != _worker_thread) {
482 #ifdef _WINDOWS
483 // On Windows, os::NakedYield() does not work as well
484 // as short sleep.
485 os::naked_short_sleep(1);
486 #else
487 os::NakedYield();
488 #endif
489 }
490 }
491
492 static void inc_pending_op_count() {
493 Atomic::inc(&_pending_op_count);
494 }
495
496 static void dec_pending_op_count() {
497 Atomic::dec(&_pending_op_count);
498 assert(_pending_op_count >= 0, "Sanity check");
499 }
500
501
502 private:
503 // retrieve a pooled memory record or create new one if there is not
504 // one available
505 static MemRecorder* get_new_or_pooled_instance();
506 static void create_memory_record(address addr, MEMFLAGS type,
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