author | rkennke |
Thu, 05 Apr 2018 10:54:53 +0200 | |
changeset 49722 | a47d1e21b3f1 |
parent 47885 | 5caa1d5f74c1 |
child 57777 | 90ead0febf56 |
permissions | -rw-r--r-- |
47885
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
1 |
/* |
49722
a47d1e21b3f1
8199735: Mark word updates need to use Access API
rkennke
parents:
47885
diff
changeset
|
2 |
* Copyright (c) 2017, 2018 Oracle and/or its affiliates. All rights reserved. |
47885
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
3 |
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
4 |
* |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
5 |
* This code is free software; you can redistribute it and/or modify it |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
6 |
* under the terms of the GNU General Public License version 2 only, as |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
7 |
* published by the Free Software Foundation. |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
8 |
* |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
9 |
* This code is distributed in the hope that it will be useful, but WITHOUT |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
10 |
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
11 |
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
12 |
* version 2 for more details (a copy is included in the LICENSE file that |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
13 |
* accompanied this code). |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
14 |
* |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
15 |
* You should have received a copy of the GNU General Public License version |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
16 |
* 2 along with this work; if not, write to the Free Software Foundation, |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
17 |
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
18 |
* |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
19 |
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
20 |
* or visit www.oracle.com if you need additional information or have any |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
21 |
* questions. |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
22 |
*/ |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
23 |
|
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
24 |
#include "precompiled.hpp" |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
25 |
#include "gc/shared/preservedMarks.inline.hpp" |
49722
a47d1e21b3f1
8199735: Mark word updates need to use Access API
rkennke
parents:
47885
diff
changeset
|
26 |
#include "oops/oop.inline.hpp" |
47885
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
27 |
#include "unittest.hpp" |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
28 |
|
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
29 |
class ScopedDisabledBiasedLocking { |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
30 |
bool _orig; |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
31 |
public: |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
32 |
ScopedDisabledBiasedLocking() : _orig(UseBiasedLocking) { UseBiasedLocking = false; } |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
33 |
~ScopedDisabledBiasedLocking() { UseBiasedLocking = _orig; } |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
34 |
}; |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
35 |
|
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
36 |
// Class to create a "fake" oop with a mark that will |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
37 |
// return true for calls to must_be_preserved(). |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
38 |
class FakeOop { |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
39 |
oopDesc _oop; |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
40 |
|
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
41 |
public: |
49722
a47d1e21b3f1
8199735: Mark word updates need to use Access API
rkennke
parents:
47885
diff
changeset
|
42 |
FakeOop() : _oop() { _oop.set_mark_raw(originalMark()); } |
47885
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
43 |
|
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
44 |
oop get_oop() { return &_oop; } |
49722
a47d1e21b3f1
8199735: Mark word updates need to use Access API
rkennke
parents:
47885
diff
changeset
|
45 |
markOop mark() { return _oop.mark_raw(); } |
a47d1e21b3f1
8199735: Mark word updates need to use Access API
rkennke
parents:
47885
diff
changeset
|
46 |
void set_mark(markOop m) { _oop.set_mark_raw(m); } |
47885
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
47 |
void forward_to(oop obj) { |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
48 |
markOop m = markOopDesc::encode_pointer_as_mark(obj); |
49722
a47d1e21b3f1
8199735: Mark word updates need to use Access API
rkennke
parents:
47885
diff
changeset
|
49 |
_oop.set_mark_raw(m); |
47885
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
50 |
} |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
51 |
|
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
52 |
static markOop originalMark() { return markOop(markOopDesc::lock_mask_in_place); } |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
53 |
static markOop changedMark() { return markOop(0x4711); } |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
54 |
}; |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
55 |
|
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
56 |
TEST_VM(PreservedMarks, iterate_and_restore) { |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
57 |
// Need to disable biased locking to easily |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
58 |
// create oops that "must_be_preseved" |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
59 |
ScopedDisabledBiasedLocking dbl; |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
60 |
|
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
61 |
PreservedMarks pm; |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
62 |
FakeOop o1; |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
63 |
FakeOop o2; |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
64 |
FakeOop o3; |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
65 |
FakeOop o4; |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
66 |
|
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
67 |
// Make sure initial marks are correct. |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
68 |
ASSERT_EQ(o1.mark(), FakeOop::originalMark()); |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
69 |
ASSERT_EQ(o2.mark(), FakeOop::originalMark()); |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
70 |
ASSERT_EQ(o3.mark(), FakeOop::originalMark()); |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
71 |
ASSERT_EQ(o4.mark(), FakeOop::originalMark()); |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
72 |
|
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
73 |
// Change the marks and verify change. |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
74 |
o1.set_mark(FakeOop::changedMark()); |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
75 |
o2.set_mark(FakeOop::changedMark()); |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
76 |
ASSERT_EQ(o1.mark(), FakeOop::changedMark()); |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
77 |
ASSERT_EQ(o2.mark(), FakeOop::changedMark()); |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
78 |
|
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
79 |
// Push o1 and o2 to have their marks preserved. |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
80 |
pm.push(o1.get_oop(), o1.mark()); |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
81 |
pm.push(o2.get_oop(), o2.mark()); |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
82 |
|
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
83 |
// Fake a move from o1->o3 and o2->o4. |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
84 |
o1.forward_to(o3.get_oop()); |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
85 |
o2.forward_to(o4.get_oop()); |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
86 |
ASSERT_EQ(o1.get_oop()->forwardee(), o3.get_oop()); |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
87 |
ASSERT_EQ(o2.get_oop()->forwardee(), o4.get_oop()); |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
88 |
// Adjust will update the PreservedMarks stack to |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
89 |
// make sure the mark is updated at the new location. |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
90 |
pm.adjust_during_full_gc(); |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
91 |
|
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
92 |
// Restore all preserved and verify that the changed |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
93 |
// mark is now present at o3 and o4. |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
94 |
pm.restore(); |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
95 |
ASSERT_EQ(o3.mark(), FakeOop::changedMark()); |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
96 |
ASSERT_EQ(o4.mark(), FakeOop::changedMark()); |
5caa1d5f74c1
8186571: Implementation: JEP 307: Parallel Full GC for G1
sjohanss
parents:
diff
changeset
|
97 |
} |