1 /*
 2  * Copyright Amazon.com Inc. 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
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24 
25 #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHMARKCLOSURES_HPP
26 #define SHARE_GC_SHENANDOAH_SHENANDOAHMARKCLOSURES_HPP
27 
28 #include "gc/shenandoah/shenandoahHeap.hpp"
29 #include "gc/shenandoah/shenandoahAgeCensus.hpp"
30 
31 class ShenandoahMarkingContext;
32 class ShenandoahHeapRegion;
33 
34 class ShenandoahFinalMarkUpdateRegionStateClosure : public ShenandoahHeapRegionClosure {
35 private:
36   ShenandoahMarkingContext* const _ctx;
37   ShenandoahHeapLock* const _lock;
38 public:
39   explicit ShenandoahFinalMarkUpdateRegionStateClosure(ShenandoahMarkingContext* ctx);
40 
41   void heap_region_do(ShenandoahHeapRegion* r);
42 
43   bool is_thread_safe() { return true; }
44 };
45 
46 // Add [TAMS, top) volume over young regions. Used to correct age 0 cohort census
47 // for adaptive tenuring when census is taken during marking.
48 // In non-product builds, for the purposes of verification, we also collect the total
49 // live objects in young regions as well.
50 class ShenandoahUpdateCensusZeroCohortClosure : public ShenandoahHeapRegionClosure {
51 private:
52   ShenandoahMarkingContext* const _ctx;
53   // Population size units are words (not bytes)
54   size_t _age0_pop;                // running tally of age0 population size
55   size_t _total_pop;               // total live population size
56 public:
57   ShenandoahUpdateCensusZeroCohortClosure(ShenandoahMarkingContext* ctx);
58 
59   void heap_region_do(ShenandoahHeapRegion* r);
60 
61   size_t get_age0_population()  { return _age0_pop; }
62   size_t get_total_population() { return _total_pop; }
63 };
64 #endif // SHARE_GC_SHENANDOAH_SHENANDOAHMARKCLOSURES_HPP