Mercurial > hg > truffle

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

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
7088955: add C2 IR support to the SA Reviewed-by: kvn
author never
date Sun, 11 Sep 2011 14:48:24 -0700
parents
children 4bec1b1f7b33
comparison
equal deleted inserted replaced
3938:e6b1331a51d2 3939:f6f3bb0ee072
1 /*
2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
3 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
4 *
5 *
6 *
7 *
8 *
9 *
10 *
11 *
12 *
13 *
14 *
15 *
16 *
17 *
18 *
19 *
20 *
21 *
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 // ReceiverTypeData
35 //
36 // A ReceiverTypeData is used to access profiling information about a
37 // dynamic type check. It consists of a counter which counts the total times
38 // that the check is reached, and a series of (Klass, count) pairs
39 // which are used to store a type profile for the receiver of the check.
40 public class ReceiverTypeData extends CounterData {
41 static final int receiver0Offset = counterCellCount;
42 static final int count0Offset = receiver0Offset + 1;
43 static final int receiverTypeRowCellCount = (count0Offset + 1) - receiver0Offset;
44
45 public ReceiverTypeData(DataLayout layout) {
46 super(layout);
47 //assert(layout.tag() == DataLayout.receiverTypeDataTag ||
48 // layout.tag() == DataLayout.virtualCallDataTag, "wrong type");
49 }
50
51 boolean isReceivertypedata() { return true; }
52
53 static int staticCellCount() {
54 return counterCellCount + MethodData.TypeProfileWidth * receiverTypeRowCellCount;
55 }
56
57 public int cellCount() {
58 return staticCellCount();
59 }
60
61 // Direct accessors
62 public static int rowLimit() {
63 return MethodData.TypeProfileWidth;
64 }
65 public static int receiverCellIndex(int row) {
66 return receiver0Offset + row * receiverTypeRowCellCount;
67 }
68 public static int receiverCountCellIndex(int row) {
69 return count0Offset + row * receiverTypeRowCellCount;
70 }
71
72 // Get the receiver at row. The 'unchecked' version is needed by parallel old
73 // gc; it does not assert the receiver is a klass. During compaction of the
74 // perm gen, the klass may already have moved, so the isKlass() predicate
75 // would fail. The 'normal' version should be used whenever possible.
76 Klass receiverUnchecked(int row) {
77 //assert(row < rowLimit(), "oob");
78 Oop recv = oopAt(receiverCellIndex(row));
79 return (Klass)recv;
80 }
81
82 public Klass receiver(int row) {
83 Klass recv = receiverUnchecked(row);
84 //assert(recv == NULL || ((oop)recv).isKlass(), "wrong type");
85 return recv;
86 }
87
88 public int receiverCount(int row) {
89 //assert(row < rowLimit(), "oob");
90 return uintAt(receiverCountCellIndex(row));
91 }
92
93 // Code generation support
94 static int receiverOffset(int row) {
95 return cellOffset(receiverCellIndex(row));
96 }
97 static int receiverCountOffset(int row) {
98 return cellOffset(receiverCountCellIndex(row));
99 }
100 static int receiverTypeDataSize() {
101 return cellOffset(staticCellCount());
102 }
103
104 void printReceiverDataOn(PrintStream st) {
105 int row;
106 int entries = 0;
107 for (row = 0; row < rowLimit(); row++) {
108 if (receiver(row) != null) entries++;
109 }
110 st.println("count(" + count() + ") entries(" + entries + ")");
111 for (row = 0; row < rowLimit(); row++) {
112 if (receiver(row) != null) {
113 tab(st);
114 receiver(row).printValueOn(st);
115 st.println("(" + receiverCount(row) + ")");
116 }
117 }
118 }
119 public void printDataOn(PrintStream st) {
120 printShared(st, "ReceiverTypeData");
121 printReceiverDataOn(st);
122 }
123 }