author | zgu |
Mon, 15 Jul 2019 11:23:05 -0400 | |
changeset 55681 | 7b671e6b0d5b |
parent 55654 | 92ab031d6540 |
child 58059 | baa4dd528de0 |
permissions | -rw-r--r-- |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
1 |
/* |
54006 | 2 |
* Copyright (c) 2013, 2019, Red Hat, Inc. All rights reserved. |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
3 |
* |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
4 |
* This code is free software; you can redistribute it and/or modify it |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
5 |
* under the terms of the GNU General Public License version 2 only, as |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
6 |
* published by the Free Software Foundation. |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
7 |
* |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
8 |
* This code is distributed in the hope that it will be useful, but WITHOUT |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
9 |
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
10 |
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
11 |
* version 2 for more details (a copy is included in the LICENSE file that |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
12 |
* accompanied this code). |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
13 |
* |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
14 |
* You should have received a copy of the GNU General Public License version |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
15 |
* 2 along with this work; if not, write to the Free Software Foundation, |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
16 |
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
17 |
* |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
18 |
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
19 |
* or visit www.oracle.com if you need additional information or have any |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
20 |
* questions. |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
21 |
* |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
22 |
*/ |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
23 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
24 |
#include "precompiled.hpp" |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
25 |
#include "gc/shenandoah/shenandoahAsserts.hpp" |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
26 |
#include "gc/shenandoah/shenandoahBarrierSet.hpp" |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
27 |
#include "gc/shenandoah/shenandoahBarrierSetAssembler.hpp" |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
28 |
#include "gc/shenandoah/shenandoahCollectorPolicy.hpp" |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
29 |
#include "gc/shenandoah/shenandoahHeap.inline.hpp" |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
30 |
#include "gc/shenandoah/shenandoahHeuristics.hpp" |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
31 |
#include "gc/shenandoah/shenandoahTraversalGC.hpp" |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
32 |
#include "memory/iterator.inline.hpp" |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
33 |
#include "runtime/interfaceSupport.inline.hpp" |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
34 |
#ifdef COMPILER1 |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
35 |
#include "gc/shenandoah/c1/shenandoahBarrierSetC1.hpp" |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
36 |
#endif |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
37 |
#ifdef COMPILER2 |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
38 |
#include "gc/shenandoah/c2/shenandoahBarrierSetC2.hpp" |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
39 |
#endif |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
40 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
41 |
class ShenandoahBarrierSetC1; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
42 |
class ShenandoahBarrierSetC2; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
43 |
|
55015 | 44 |
template <bool STOREVAL_EVAC_BARRIER> |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
45 |
class ShenandoahUpdateRefsForOopClosure: public BasicOopIterateClosure { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
46 |
private: |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
47 |
ShenandoahHeap* _heap; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
48 |
ShenandoahBarrierSet* _bs; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
49 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
50 |
template <class T> |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
51 |
inline void do_oop_work(T* p) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
52 |
oop o; |
55015 | 53 |
if (STOREVAL_EVAC_BARRIER) { |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
54 |
o = _heap->evac_update_with_forwarded(p); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
55 |
if (!CompressedOops::is_null(o)) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
56 |
_bs->enqueue(o); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
57 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
58 |
} else { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
59 |
_heap->maybe_update_with_forwarded(p); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
60 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
61 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
62 |
public: |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
63 |
ShenandoahUpdateRefsForOopClosure() : _heap(ShenandoahHeap::heap()), _bs(ShenandoahBarrierSet::barrier_set()) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
64 |
assert(UseShenandoahGC && ShenandoahCloneBarrier, "should be enabled"); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
65 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
66 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
67 |
virtual void do_oop(oop* p) { do_oop_work(p); } |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
68 |
virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
69 |
}; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
70 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
71 |
ShenandoahBarrierSet::ShenandoahBarrierSet(ShenandoahHeap* heap) : |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
72 |
BarrierSet(make_barrier_set_assembler<ShenandoahBarrierSetAssembler>(), |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
73 |
make_barrier_set_c1<ShenandoahBarrierSetC1>(), |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
74 |
make_barrier_set_c2<ShenandoahBarrierSetC2>(), |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
75 |
NULL /* barrier_set_nmethod */, |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
76 |
BarrierSet::FakeRtti(BarrierSet::ShenandoahBarrierSet)), |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
77 |
_heap(heap), |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
78 |
_satb_mark_queue_set() |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
79 |
{ |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
80 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
81 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
82 |
ShenandoahBarrierSetAssembler* ShenandoahBarrierSet::assembler() { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
83 |
BarrierSetAssembler* const bsa = BarrierSet::barrier_set()->barrier_set_assembler(); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
84 |
return reinterpret_cast<ShenandoahBarrierSetAssembler*>(bsa); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
85 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
86 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
87 |
void ShenandoahBarrierSet::print_on(outputStream* st) const { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
88 |
st->print("ShenandoahBarrierSet"); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
89 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
90 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
91 |
bool ShenandoahBarrierSet::is_a(BarrierSet::Name bsn) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
92 |
return bsn == BarrierSet::ShenandoahBarrierSet; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
93 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
94 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
95 |
bool ShenandoahBarrierSet::is_aligned(HeapWord* hw) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
96 |
return true; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
97 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
98 |
|
55015 | 99 |
template <class T, bool STOREVAL_EVAC_BARRIER> |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
100 |
void ShenandoahBarrierSet::write_ref_array_loop(HeapWord* start, size_t count) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
101 |
assert(UseShenandoahGC && ShenandoahCloneBarrier, "should be enabled"); |
55015 | 102 |
ShenandoahUpdateRefsForOopClosure<STOREVAL_EVAC_BARRIER> cl; |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
103 |
T* dst = (T*) start; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
104 |
for (size_t i = 0; i < count; i++) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
105 |
cl.do_oop(dst++); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
106 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
107 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
108 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
109 |
void ShenandoahBarrierSet::write_ref_array(HeapWord* start, size_t count) { |
54425
13c02cc7a6e5
8221848: Shenandoah: ArrayCopy post-barrier improvements
rkennke
parents:
54423
diff
changeset
|
110 |
assert(_heap->is_update_refs_in_progress(), "should not be here otherwise"); |
13c02cc7a6e5
8221848: Shenandoah: ArrayCopy post-barrier improvements
rkennke
parents:
54423
diff
changeset
|
111 |
assert(count > 0, "Should have been filtered before"); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
112 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
113 |
if (_heap->is_concurrent_traversal_in_progress()) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
114 |
ShenandoahEvacOOMScope oom_evac_scope; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
115 |
if (UseCompressedOops) { |
55015 | 116 |
write_ref_array_loop<narrowOop, /* evac = */ true>(start, count); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
117 |
} else { |
55015 | 118 |
write_ref_array_loop<oop, /* evac = */ true>(start, count); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
119 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
120 |
} else { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
121 |
if (UseCompressedOops) { |
55015 | 122 |
write_ref_array_loop<narrowOop, /* evac = */ false>(start, count); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
123 |
} else { |
55015 | 124 |
write_ref_array_loop<oop, /* evac = */ false>(start, count); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
125 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
126 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
127 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
128 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
129 |
template <class T> |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
130 |
void ShenandoahBarrierSet::write_ref_array_pre_work(T* dst, size_t count) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
131 |
shenandoah_assert_not_in_cset_loc_except(dst, _heap->cancelled_gc()); |
54383 | 132 |
assert(ShenandoahThreadLocalData::satb_mark_queue(Thread::current()).is_active(), "Shouldn't be here otherwise"); |
133 |
assert(ShenandoahSATBBarrier, "Shouldn't be here otherwise"); |
|
134 |
assert(count > 0, "Should have been filtered before"); |
|
135 |
||
136 |
Thread* thread = Thread::current(); |
|
137 |
ShenandoahMarkingContext* ctx = _heap->marking_context(); |
|
138 |
bool has_forwarded = _heap->has_forwarded_objects(); |
|
139 |
T* elem_ptr = dst; |
|
140 |
for (size_t i = 0; i < count; i++, elem_ptr++) { |
|
141 |
T heap_oop = RawAccess<>::oop_load(elem_ptr); |
|
142 |
if (!CompressedOops::is_null(heap_oop)) { |
|
143 |
oop obj = CompressedOops::decode_not_null(heap_oop); |
|
144 |
if (has_forwarded) { |
|
145 |
obj = resolve_forwarded_not_null(obj); |
|
146 |
} |
|
147 |
if (!ctx->is_marked(obj)) { |
|
148 |
ShenandoahThreadLocalData::satb_mark_queue(thread).enqueue_known_active(obj); |
|
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
149 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
150 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
151 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
152 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
153 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
154 |
void ShenandoahBarrierSet::write_ref_array_pre(oop* dst, size_t count, bool dest_uninitialized) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
155 |
if (! dest_uninitialized) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
156 |
write_ref_array_pre_work(dst, count); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
157 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
158 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
159 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
160 |
void ShenandoahBarrierSet::write_ref_array_pre(narrowOop* dst, size_t count, bool dest_uninitialized) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
161 |
if (! dest_uninitialized) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
162 |
write_ref_array_pre_work(dst, count); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
163 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
164 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
165 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
166 |
template <class T> |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
167 |
inline void ShenandoahBarrierSet::inline_write_ref_field_pre(T* field, oop new_val) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
168 |
shenandoah_assert_not_in_cset_loc_except(field, _heap->cancelled_gc()); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
169 |
if (_heap->is_concurrent_mark_in_progress()) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
170 |
T heap_oop = RawAccess<>::oop_load(field); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
171 |
if (!CompressedOops::is_null(heap_oop)) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
172 |
enqueue(CompressedOops::decode(heap_oop)); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
173 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
174 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
175 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
176 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
177 |
// These are the more general virtual versions. |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
178 |
void ShenandoahBarrierSet::write_ref_field_pre_work(oop* field, oop new_val) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
179 |
inline_write_ref_field_pre(field, new_val); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
180 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
181 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
182 |
void ShenandoahBarrierSet::write_ref_field_pre_work(narrowOop* field, oop new_val) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
183 |
inline_write_ref_field_pre(field, new_val); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
184 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
185 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
186 |
void ShenandoahBarrierSet::write_ref_field_pre_work(void* field, oop new_val) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
187 |
guarantee(false, "Not needed"); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
188 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
189 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
190 |
void ShenandoahBarrierSet::write_ref_field_work(void* v, oop o, bool release) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
191 |
shenandoah_assert_not_in_cset_loc_except(v, _heap->cancelled_gc()); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
192 |
shenandoah_assert_not_forwarded_except (v, o, o == NULL || _heap->cancelled_gc() || !_heap->is_concurrent_mark_in_progress()); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
193 |
shenandoah_assert_not_in_cset_except (v, o, o == NULL || _heap->cancelled_gc() || !_heap->is_concurrent_mark_in_progress()); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
194 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
195 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
196 |
void ShenandoahBarrierSet::write_region(MemRegion mr) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
197 |
if (!ShenandoahCloneBarrier) return; |
54425
13c02cc7a6e5
8221848: Shenandoah: ArrayCopy post-barrier improvements
rkennke
parents:
54423
diff
changeset
|
198 |
if (!_heap->is_update_refs_in_progress()) return; |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
199 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
200 |
// This is called for cloning an object (see jvm.cpp) after the clone |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
201 |
// has been made. We are not interested in any 'previous value' because |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
202 |
// it would be NULL in any case. But we *are* interested in any oop* |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
203 |
// that potentially need to be updated. |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
204 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
205 |
oop obj = oop(mr.start()); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
206 |
shenandoah_assert_correct(NULL, obj); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
207 |
if (_heap->is_concurrent_traversal_in_progress()) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
208 |
ShenandoahEvacOOMScope oom_evac_scope; |
55015 | 209 |
ShenandoahUpdateRefsForOopClosure</* evac = */ true> cl; |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
210 |
obj->oop_iterate(&cl); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
211 |
} else { |
55015 | 212 |
ShenandoahUpdateRefsForOopClosure</* evac = */ false> cl; |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
213 |
obj->oop_iterate(&cl); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
214 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
215 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
216 |
|
54423 | 217 |
oop ShenandoahBarrierSet::load_reference_barrier_not_null(oop obj) { |
218 |
if (ShenandoahLoadRefBarrier && _heap->has_forwarded_objects()) { |
|
219 |
return load_reference_barrier_impl(obj); |
|
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
220 |
} else { |
54423 | 221 |
return obj; |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
222 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
223 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
224 |
|
54423 | 225 |
oop ShenandoahBarrierSet::load_reference_barrier(oop obj) { |
226 |
if (obj != NULL) { |
|
227 |
return load_reference_barrier_not_null(obj); |
|
228 |
} else { |
|
229 |
return obj; |
|
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
230 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
231 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
232 |
|
54423 | 233 |
|
234 |
oop ShenandoahBarrierSet::load_reference_barrier_mutator(oop obj) { |
|
235 |
assert(ShenandoahLoadRefBarrier, "should be enabled"); |
|
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
236 |
assert(_heap->is_gc_in_progress_mask(ShenandoahHeap::EVACUATION | ShenandoahHeap::TRAVERSAL), "evac should be in progress"); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
237 |
shenandoah_assert_in_cset(NULL, obj); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
238 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
239 |
oop fwd = resolve_forwarded_not_null(obj); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
240 |
if (oopDesc::equals_raw(obj, fwd)) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
241 |
ShenandoahEvacOOMScope oom_evac_scope; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
242 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
243 |
Thread* thread = Thread::current(); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
244 |
oop res_oop = _heap->evacuate_object(obj, thread); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
245 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
246 |
// Since we are already here and paid the price of getting through runtime call adapters |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
247 |
// and acquiring oom-scope, it makes sense to try and evacuate more adjacent objects, |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
248 |
// thus amortizing the overhead. For sparsely live heaps, scan costs easily dominate |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
249 |
// total assist costs, and can introduce a lot of evacuation latency. This is why we |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
250 |
// only scan for _nearest_ N objects, regardless if they are eligible for evac or not. |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
251 |
// The scan itself should also avoid touching the non-marked objects below TAMS, because |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
252 |
// their metadata (notably, klasses) may be incorrect already. |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
253 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
254 |
size_t max = ShenandoahEvacAssist; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
255 |
if (max > 0) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
256 |
// Traversal is special: it uses incomplete marking context, because it coalesces evac with mark. |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
257 |
// Other code uses complete marking context, because evac happens after the mark. |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
258 |
ShenandoahMarkingContext* ctx = _heap->is_concurrent_traversal_in_progress() ? |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
259 |
_heap->marking_context() : _heap->complete_marking_context(); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
260 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
261 |
ShenandoahHeapRegion* r = _heap->heap_region_containing(obj); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
262 |
assert(r->is_cset(), "sanity"); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
263 |
|
55076
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
55015
diff
changeset
|
264 |
HeapWord* cur = (HeapWord*)obj + obj->size(); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
265 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
266 |
size_t count = 0; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
267 |
while ((cur < r->top()) && ctx->is_marked(oop(cur)) && (count++ < max)) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
268 |
oop cur_oop = oop(cur); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
269 |
if (oopDesc::equals_raw(cur_oop, resolve_forwarded_not_null(cur_oop))) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
270 |
_heap->evacuate_object(cur_oop, thread); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
271 |
} |
55076
785a12e0f89b
8224584: Shenandoah: Eliminate forwarding pointer word
rkennke
parents:
55015
diff
changeset
|
272 |
cur = cur + cur_oop->size(); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
273 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
274 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
275 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
276 |
return res_oop; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
277 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
278 |
return fwd; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
279 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
280 |
|
54423 | 281 |
oop ShenandoahBarrierSet::load_reference_barrier_impl(oop obj) { |
282 |
assert(ShenandoahLoadRefBarrier, "should be enabled"); |
|
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
283 |
if (!CompressedOops::is_null(obj)) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
284 |
bool evac_in_progress = _heap->is_gc_in_progress_mask(ShenandoahHeap::EVACUATION | ShenandoahHeap::TRAVERSAL); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
285 |
oop fwd = resolve_forwarded_not_null(obj); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
286 |
if (evac_in_progress && |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
287 |
_heap->in_collection_set(obj) && |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
288 |
oopDesc::equals_raw(obj, fwd)) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
289 |
Thread *t = Thread::current(); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
290 |
if (t->is_GC_task_thread()) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
291 |
return _heap->evacuate_object(obj, t); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
292 |
} else { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
293 |
ShenandoahEvacOOMScope oom_evac_scope; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
294 |
return _heap->evacuate_object(obj, t); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
295 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
296 |
} else { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
297 |
return fwd; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
298 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
299 |
} else { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
300 |
return obj; |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
301 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
302 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
303 |
|
54423 | 304 |
void ShenandoahBarrierSet::storeval_barrier(oop obj) { |
54383 | 305 |
if (ShenandoahStoreValEnqueueBarrier && !CompressedOops::is_null(obj) && _heap->is_concurrent_traversal_in_progress()) { |
306 |
enqueue(obj); |
|
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
307 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
308 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
309 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
310 |
void ShenandoahBarrierSet::keep_alive_barrier(oop obj) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
311 |
if (ShenandoahKeepAliveBarrier && _heap->is_concurrent_mark_in_progress()) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
312 |
enqueue(obj); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
313 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
314 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
315 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
316 |
void ShenandoahBarrierSet::enqueue(oop obj) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
317 |
shenandoah_assert_not_forwarded_if(NULL, obj, _heap->is_concurrent_traversal_in_progress()); |
54383 | 318 |
assert(_satb_mark_queue_set.is_active(), "only get here when SATB active"); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
319 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
320 |
// Filter marked objects before hitting the SATB queues. The same predicate would |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
321 |
// be used by SATBMQ::filter to eliminate already marked objects downstream, but |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
322 |
// filtering here helps to avoid wasteful SATB queueing work to begin with. |
53850 | 323 |
if (!_heap->requires_marking<false>(obj)) return; |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
324 |
|
54383 | 325 |
ShenandoahThreadLocalData::satb_mark_queue(Thread::current()).enqueue_known_active(obj); |
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
326 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
327 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
328 |
void ShenandoahBarrierSet::on_thread_create(Thread* thread) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
329 |
// Create thread local data |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
330 |
ShenandoahThreadLocalData::create(thread); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
331 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
332 |
|
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
333 |
void ShenandoahBarrierSet::on_thread_destroy(Thread* thread) { |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
334 |
// Destroy thread local data |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
335 |
ShenandoahThreadLocalData::destroy(thread); |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
336 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
337 |
|
54006 | 338 |
void ShenandoahBarrierSet::on_thread_attach(Thread *thread) { |
339 |
assert(!thread->is_Java_thread() || !SafepointSynchronize::is_at_safepoint(), |
|
340 |
"We should not be at a safepoint"); |
|
341 |
SATBMarkQueue& queue = ShenandoahThreadLocalData::satb_mark_queue(thread); |
|
342 |
assert(!queue.is_active(), "SATB queue should not be active"); |
|
343 |
assert( queue.is_empty(), "SATB queue should be empty"); |
|
344 |
queue.set_active(_satb_mark_queue_set.is_active()); |
|
345 |
if (thread->is_Java_thread()) { |
|
346 |
ShenandoahThreadLocalData::set_gc_state(thread, _heap->gc_state()); |
|
347 |
ShenandoahThreadLocalData::initialize_gclab(thread); |
|
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
348 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
349 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
350 |
|
54006 | 351 |
void ShenandoahBarrierSet::on_thread_detach(Thread *thread) { |
352 |
SATBMarkQueue& queue = ShenandoahThreadLocalData::satb_mark_queue(thread); |
|
353 |
queue.flush(); |
|
354 |
if (thread->is_Java_thread()) { |
|
355 |
PLAB* gclab = ShenandoahThreadLocalData::gclab(thread); |
|
356 |
if (gclab != NULL) { |
|
357 |
gclab->retire(); |
|
358 |
} |
|
52925
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
359 |
} |
9c18c9d839d3
8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
rkennke
parents:
diff
changeset
|
360 |
} |
55654
92ab031d6540
8226695: Shenandoah: Wire C1 and C2 IN_NATIVE barrier
rkennke
parents:
55076
diff
changeset
|
361 |
|
92ab031d6540
8226695: Shenandoah: Wire C1 and C2 IN_NATIVE barrier
rkennke
parents:
55076
diff
changeset
|
362 |
oop ShenandoahBarrierSet::oop_load_from_native_barrier(oop obj) { |
55681 | 363 |
if (CompressedOops::is_null(obj)) { |
364 |
return NULL; |
|
365 |
} |
|
366 |
||
367 |
if (_heap->is_evacuation_in_progress() && |
|
368 |
!_heap->complete_marking_context()->is_marked(obj)) { |
|
369 |
return NULL; |
|
370 |
} |
|
371 |
||
372 |
return load_reference_barrier_not_null(obj); |
|
55654
92ab031d6540
8226695: Shenandoah: Wire C1 and C2 IN_NATIVE barrier
rkennke
parents:
55076
diff
changeset
|
373 |
} |