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comparison agent/src/share/classes/sun/jvm/hotspot/oops/RetData.java @ 3939:f6f3bb0ee072

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7088955: add C2 IR support to the SA Reviewed-by: kvn
author never
date Sun, 11 Sep 2011 14:48:24 -0700
parents
children 79f492f184d0
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3938:e6b1331a51d2 3939:f6f3bb0ee072
1 /*
2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact 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 package sun.jvm.hotspot.oops;
26
27 import java.io.*;
28 import java.util.*;
29 import sun.jvm.hotspot.debugger.*;
30 import sun.jvm.hotspot.runtime.*;
31 import sun.jvm.hotspot.types.*;
32 import sun.jvm.hotspot.utilities.*;
33
34 // RetData
35 //
36 // A RetData is used to access profiling information for a ret bytecode.
37 // It is composed of a count of the number of times that the ret has
38 // been executed, followed by a series of triples of the form
39 // (bci, count, di) which count the number of times that some bci was the
40 // target of the ret and cache a corresponding data displacement.
41 public class RetData extends CounterData {
42
43 static final int bci0Offset = counterCellCount;
44 static final int count0Offset = bci0Offset + 1;
45 static final int displacement0Offset = count0Offset + 1;
46 static final int retRowCellCount = (displacement0Offset + 1) - bci0Offset;
47
48 public RetData(DataLayout layout) {
49 super(layout);
50 //assert(layout.tag() == DataLayout.retDataTag, "wrong type");
51 }
52
53 static final int noBci = -1; // value of bci when bci1/2 are not in use.
54
55 static int staticCellCount() {
56 return counterCellCount + MethodData.BciProfileWidth * retRowCellCount;
57 }
58
59 public int cellCount() {
60 return staticCellCount();
61 }
62
63 static int rowLimit() {
64 return MethodData.BciProfileWidth;
65 }
66 static int bciCellIndex(int row) {
67 return bci0Offset + row * retRowCellCount;
68 }
69 static int bciCountCellIndex(int row) {
70 return count0Offset + row * retRowCellCount;
71 }
72 static int bciDisplacementCellIndex(int row) {
73 return displacement0Offset + row * retRowCellCount;
74 }
75
76 // Direct accessors
77 int bci(int row) {
78 return intAt(bciCellIndex(row));
79 }
80 int bciCount(int row) {
81 return uintAt(bciCountCellIndex(row));
82 }
83 int bciDisplacement(int row) {
84 return intAt(bciDisplacementCellIndex(row));
85 }
86
87 // Code generation support
88 static int bciOffset(int row) {
89 return cellOffset(bciCellIndex(row));
90 }
91 static int bciCountOffset(int row) {
92 return cellOffset(bciCountCellIndex(row));
93 }
94 static int bciDisplacementOffset(int row) {
95 return cellOffset(bciDisplacementCellIndex(row));
96 }
97
98 public void printDataOn(PrintStream st) {
99 printShared(st, "RetData");
100 int row;
101 int entries = 0;
102 for (row = 0; row < rowLimit(); row++) {
103 if (bci(row) != noBci) entries++;
104 }
105 st.println("count(" + count() + ") entries(" + entries + ")");
106 for (row = 0; row < rowLimit(); row++) {
107 if (bci(row) != noBci) {
108 tab(st);
109 st.println(" bci(" + bci(row) + ": count(" + bciCount(row) + ") displacement(" + bciDisplacement(row) + "))");
110 }
111 }
112 }
113 }