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comparison jvmci/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotMethodDataAccessor.java @ 23717:41fa89f93355

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removed jdk.vm.ci.hotspot.HotSpotMethodDataAccessor.Tag (JDK-8159613)
author Doug Simon <doug.simon@oracle.com>
date Thu, 30 Jun 2016 22:07:57 +0200
parents 4b58c92e939b
children a52d7039723b
comparison
equal deleted inserted replaced
23716:74c4e0459c11 23717:41fa89f93355
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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23 package jdk.vm.ci.hotspot; 1 package jdk.vm.ci.hotspot;
24 2
25 import static jdk.vm.ci.hotspot.HotSpotVMConfig.config;
26 import jdk.vm.ci.meta.JavaMethodProfile; 3 import jdk.vm.ci.meta.JavaMethodProfile;
27 import jdk.vm.ci.meta.JavaTypeProfile; 4 import jdk.vm.ci.meta.JavaTypeProfile;
28 import jdk.vm.ci.meta.ProfilingInfo; 5 import jdk.vm.ci.meta.ProfilingInfo;
29 import jdk.vm.ci.meta.TriState; 6 import jdk.vm.ci.meta.TriState;
30 7
31 /** 8 /**
32 * Interface for accessor objects that encapsulate the logic for accessing the different kinds of 9 * Base class for accessing the different kinds of data in a HotSpot {@code MethodData}. This is
33 * data in a HotSpot methodDataOop. This interface is similar to the interface {@link ProfilingInfo} 10 * similar to {@link ProfilingInfo}, but most methods require a {@link HotSpotMethodData} and the
34 * , but most methods require a MethodDataObject and the exact position within the methodData. 11 * exact position within the method data.
35 */ 12 */
36 public interface HotSpotMethodDataAccessor { 13 abstract class HotSpotMethodDataAccessor {
37 14
38 /** 15 final int tag;
39 * {@code DataLayout} tag values. 16 final int staticSize;
40 */ 17 final HotSpotVMConfig config;
41 enum Tag {
42 No(config().dataLayoutNoTag),
43 BitData(config().dataLayoutBitDataTag),
44 CounterData(config().dataLayoutCounterDataTag),
45 JumpData(config().dataLayoutJumpDataTag),
46 ReceiverTypeData(config().dataLayoutReceiverTypeDataTag),
47 VirtualCallData(config().dataLayoutVirtualCallDataTag),
48 RetData(config().dataLayoutRetDataTag),
49 BranchData(config().dataLayoutBranchDataTag),
50 MultiBranchData(config().dataLayoutMultiBranchDataTag),
51 ArgInfoData(config().dataLayoutArgInfoDataTag),
52 CallTypeData(config().dataLayoutCallTypeDataTag),
53 VirtualCallTypeData(config().dataLayoutVirtualCallTypeDataTag),
54 ParametersTypeData(config().dataLayoutParametersTypeDataTag),
55 SpeculativeTrapData(config().dataLayoutSpeculativeTrapDataTag);
56 18
57 private final int value; 19 protected HotSpotMethodDataAccessor(HotSpotVMConfig config, int tag, int staticSize) {
58 20 this.config = config;
59 Tag(int value) { 21 this.tag = tag;
60 this.value = value; 22 this.staticSize = staticSize;
61 }
62
63 public int getValue() {
64 return value;
65 }
66
67 public static Tag getEnum(int value) {
68 Tag result = values()[value];
69 assert value == result.value;
70 return result;
71 }
72 } 23 }
73 24
74 /** 25 /**
75 * Returns the {@link Tag} stored in the LayoutData header. 26 * Returns the tag stored in the LayoutData header.
76 * 27 *
77 * @return tag stored in the LayoutData header 28 * @return tag stored in the LayoutData header
78 */ 29 */
79 Tag getTag(); 30 int getTag() {
31 return tag;
32 }
33
34 static int readTag(HotSpotVMConfig config, HotSpotMethodData data, int position) {
35 final int tag = data.readUnsignedByte(position, config.dataLayoutTagOffset);
36 assert tag >= config.dataLayoutNoTag && tag <= config.dataLayoutSpeculativeTrapDataTag : "profile data tag out of bounds: " + tag;
37 return tag;
38 }
80 39
81 /** 40 /**
82 * Returns the BCI stored in the LayoutData header. 41 * Returns the BCI stored in the LayoutData header.
83 * 42 *
84 * @return An integer &ge; 0 and &le; Short.MAX_VALUE, or -1 if not supported. 43 * @return an integer between 0 and {@link Short#MAX_VALUE} inclusive, or -1 if not supported
85 */ 44 */
86 int getBCI(HotSpotMethodData data, int position); 45 int getBCI(HotSpotMethodData data, int position) {
46 return data.readUnsignedShort(position, config.dataLayoutBCIOffset);
47 }
87 48
88 /** 49 /**
89 * Computes the size for the specific data at the given position. 50 * Computes the size for the specific data at the given position.
90 * 51 *
91 * @return An integer &gt; 0. 52 * @return a value greater than 0
92 */ 53 */
93 int getSize(HotSpotMethodData data, int position); 54 final int getSize(HotSpotMethodData data, int position) {
55 int size = staticSize + getDynamicSize(data, position);
56 // Sanity check against VM
57 int vmSize = HotSpotJVMCIRuntime.runtime().compilerToVm.methodDataProfileDataSize(data.metaspaceMethodData, position);
58 assert size == vmSize : size + " != " + vmSize;
59 return size;
60 }
94 61
95 JavaTypeProfile getTypeProfile(HotSpotMethodData data, int position); 62 TriState getExceptionSeen(HotSpotMethodData data, int position) {
63 final int exceptionsMask = 1 << config.bitDataExceptionSeenFlag;
64 return TriState.get((getFlags(data, position) & exceptionsMask) != 0);
65 }
96 66
97 JavaMethodProfile getMethodProfile(HotSpotMethodData data, int position); 67 /**
68 * @param data
69 * @param position
70 */
71 JavaTypeProfile getTypeProfile(HotSpotMethodData data, int position) {
72 return null;
73 }
98 74
99 double getBranchTakenProbability(HotSpotMethodData data, int position); 75 /**
76 * @param data
77 * @param position
78 */
79 JavaMethodProfile getMethodProfile(HotSpotMethodData data, int position) {
80 return null;
81 }
100 82
101 double[] getSwitchProbabilities(HotSpotMethodData data, int position); 83 /**
84 * @param data
85 * @param position
86 */
87 double getBranchTakenProbability(HotSpotMethodData data, int position) {
88 return -1;
89 }
102 90
103 TriState getExceptionSeen(HotSpotMethodData data, int position); 91 /**
92 * @param data
93 * @param position
94 */
95 double[] getSwitchProbabilities(HotSpotMethodData data, int position) {
96 return null;
97 }
104 98
105 TriState getNullSeen(HotSpotMethodData data, int position); 99 /**
100 * @param data
101 * @param position
102 */
103 int getExecutionCount(HotSpotMethodData data, int position) {
104 return -1;
105 }
106 106
107 int getExecutionCount(HotSpotMethodData data, int position); 107 /**
108 * @param data
109 * @param position
110 */
111 TriState getNullSeen(HotSpotMethodData data, int position) {
112 return TriState.UNKNOWN;
113 }
108 114
109 StringBuilder appendTo(StringBuilder sb, HotSpotMethodData data, int pos); 115 protected int getFlags(HotSpotMethodData data, int position) {
116 return data.readUnsignedByte(position, config.dataLayoutFlagsOffset);
117 }
118
119 /**
120 * @param data
121 * @param position
122 */
123 protected int getDynamicSize(HotSpotMethodData data, int position) {
124 return 0;
125 }
126
127 abstract StringBuilder appendTo(StringBuilder sb, HotSpotMethodData data, int pos);
128
110 } 129 }