Mercurial > hg > truffle

annotate src/share/vm/gc_implementation/g1/heapRegionType.hpp @ 20481:c02ec279b062

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
8057768: Make heap region region type in G1 HeapRegion explicit Reviewed-by: brutisso, tschatzl
author brutisso
date Tue, 16 Sep 2014 14:27:40 +0200
parents
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
20481
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
1 /*
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
4 *
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
5 * This code is free software; you can redistribute it and/or modify it
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
6 * under the terms of the GNU General Public License version 2 only, as
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
7 * published by the Free Software Foundation.
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
8 *
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
9 * This code is distributed in the hope that it will be useful, but WITHOUT
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
12 * version 2 for more details (a copy is included in the LICENSE file that
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
13 * accompanied this code).
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
14 *
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
15 * You should have received a copy of the GNU General Public License version
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
16 * 2 along with this work; if not, write to the Free Software Foundation,
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
18 *
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
20 * or visit www.oracle.com if you need additional information or have any
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
21 * questions.
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
22 *
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
23 */
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
24
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGIONTYPE_HPP
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGIONTYPE_HPP
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
27
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
28 #include "memory/allocation.hpp"
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
29
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
30 #define hrt_assert_is_valid(tag) \
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
31 assert(is_valid((tag)), err_msg("invalid HR type: %u", (uint) (tag)))
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
32
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
33 class HeapRegionType VALUE_OBJ_CLASS_SPEC {
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
34 private:
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
35 // We encode the value of the heap region type so the generation can be
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
36 // determined quickly. The tag is split into two parts:
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
37 //
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
38 // major type (young, humongous) : top N-1 bits
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
39 // minor type (eden / survivor, starts / cont hum, etc.) : bottom 1 bit
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
40 //
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
41 // If there's need to increase the number of minor types in the
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
42 // future, we'll have to increase the size of the latter and hence
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
43 // decrease the size of the former.
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
44 //
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
45 // 0000 0 [ 0] Free
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
46 //
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
47 // 0001 0 Young Mask
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
48 // 0001 0 [ 2] Eden
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
49 // 0001 1 [ 3] Survivor
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
50 //
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
51 // 0010 0 Humongous Mask
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
52 // 0010 0 [ 4] Humongous Starts
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
53 // 0010 1 [ 5] Humongous Continues
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
54 //
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
55 // 01000 [ 8] Old
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
56 typedef enum {
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
57 FreeTag = 0,
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
58
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
59 YoungMask = 2,
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
60 EdenTag = YoungMask,
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
61 SurvTag = YoungMask + 1,
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
62
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
63 HumMask = 4,
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
64 HumStartsTag = HumMask,
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
65 HumContTag = HumMask + 1,
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
66
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
67 OldTag = 8
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
68 } Tag;
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
69
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
70 volatile Tag _tag;
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
71
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
72 static bool is_valid(Tag tag);
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
73
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
74 Tag get() const {
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
75 hrt_assert_is_valid(_tag);
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
76 return _tag;
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
77 }
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
78
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
79 // Sets the type to 'tag'.
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
80 void set(Tag tag) {
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
81 hrt_assert_is_valid(tag);
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
82 hrt_assert_is_valid(_tag);
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
83 _tag = tag;
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
84 }
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
85
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
86 // Sets the type to 'tag', expecting the type to be 'before'. This
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
87 // is available for when we want to add sanity checking to the type
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
88 // transition.
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
89 void set_from(Tag tag, Tag before) {
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
90 hrt_assert_is_valid(tag);
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
91 hrt_assert_is_valid(before);
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
92 hrt_assert_is_valid(_tag);
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
93 assert(_tag == before,
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
94 err_msg("HR tag: %u, expected: %u new tag; %u", _tag, before, tag));
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
95 _tag = tag;
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
96 }
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
97
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
98 public:
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
99 // Queries
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
100
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
101 bool is_free() const { return get() == FreeTag; }
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
102
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
103 bool is_young() const { return (get() & YoungMask) != 0; }
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
104 bool is_eden() const { return get() == EdenTag; }
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
105 bool is_survivor() const { return get() == SurvTag; }
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
106
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
107 bool is_humongous() const { return (get() & HumMask) != 0; }
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
108 bool is_starts_humongous() const { return get() == HumStartsTag; }
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
109 bool is_continues_humongous() const { return get() == HumContTag; }
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
110
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
111 bool is_old() const { return get() == OldTag; }
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
112
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
113 // Setters
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
114
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
115 void set_free() { set(FreeTag); }
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
116
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
117 void set_eden() { set_from(EdenTag, FreeTag); }
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
118 void set_eden_pre_gc() { set_from(EdenTag, SurvTag); }
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
119 void set_survivor() { set_from(SurvTag, FreeTag); }
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
120
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
121 void set_starts_humongous() { set_from(HumStartsTag, FreeTag); }
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
122 void set_continues_humongous() { set_from(HumContTag, FreeTag); }
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
123
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
124 void set_old() { set(OldTag); }
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
125
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
126 // Misc
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
127
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
128 const char* get_str() const;
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
129 const char* get_short_str() const;
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
130
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
131 HeapRegionType() : _tag(FreeTag) { hrt_assert_is_valid(_tag); }
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
132 };
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
133
c02ec279b062 8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
diff changeset
134 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGIONTYPE_HPP