Mercurial > hg > truffle
comparison src/share/vm/ci/ciCallProfile.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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1 /* | |
2 * Copyright 1999-2006 Sun Microsystems, Inc. All Rights Reserved. | |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 // ciCallProfile | |
26 // | |
27 // This class is used to determine the frequently called method | |
28 // at some call site | |
29 class ciCallProfile : StackObj { | |
30 private: | |
31 // Fields are initialized directly by ciMethod::call_profile_at_bci. | |
32 friend class ciMethod; | |
33 | |
34 enum { MorphismLimit = 2 }; // Max call site's morphism we care about | |
35 int _limit; // number of receivers have been determined | |
36 int _morphism; // determined call site's morphism | |
37 int _count; // # times has this call been executed | |
38 int _receiver_count[MorphismLimit + 1]; // # times receivers have been seen | |
39 ciMethod* _method[MorphismLimit + 1]; // receivers methods | |
40 ciKlass* _receiver[MorphismLimit + 1]; // receivers (exact) | |
41 | |
42 ciCallProfile() { | |
43 _limit = 0; | |
44 _morphism = 0; | |
45 _count = -1; | |
46 _receiver_count[0] = -1; | |
47 _method[0] = NULL; | |
48 _receiver[0] = NULL; | |
49 } | |
50 | |
51 void add_receiver(ciKlass* receiver, int receiver_count); | |
52 | |
53 public: | |
54 // Note: The following predicates return false for invalid profiles: | |
55 bool has_receiver(int i) { return _limit > i; } | |
56 int morphism() { return _morphism; } | |
57 | |
58 int count() { return _count; } | |
59 int receiver_count(int i) { | |
60 assert(i < _limit, "out of Call Profile MorphismLimit"); | |
61 return _receiver_count[i]; | |
62 } | |
63 float receiver_prob(int i) { | |
64 assert(i < _limit, "out of Call Profile MorphismLimit"); | |
65 return (float)_receiver_count[i]/(float)_count; | |
66 } | |
67 ciMethod* method(int i) { | |
68 assert(i < _limit, "out of Call Profile MorphismLimit"); | |
69 return _method[i]; | |
70 } | |
71 ciKlass* receiver(int i) { | |
72 assert(i < _limit, "out of Call Profile MorphismLimit"); | |
73 return _receiver[i]; | |
74 } | |
75 }; |