1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.dx.dex.cf;
import com.android.dx.dex.code.DalvCode;
import com.android.dx.rop.code.RopMethod;
import java.io.PrintStream;
/**
* Static methods and variables for collecting statistics on generated
* code.
*/
public final class CodeStatistics {
/** set to {@code true} to enable development-time debugging code */
private static final boolean DEBUG = false;
/**
* running sum of the number of registers added/removed in
* SSA form by the optimizer
*/
public static int runningDeltaRegisters = 0;
/**
* running sum of the number of insns added/removed in
* SSA form by the optimizer
*/
public static int runningDeltaInsns = 0;
/** running sum of the total number of Rop insns processed */
public static int runningTotalInsns = 0;
/**
* running sum of the number of dex-form registers added/removed in
* SSA form by the optimizer. Only valid if args.statistics is true.
*/
public static int dexRunningDeltaRegisters = 0;
/**
* running sum of the number of dex-form insns (actually code
* units) added/removed in SSA form by the optimizer. Only valid
* if args.statistics is true.
*/
public static int dexRunningDeltaInsns = 0;
/**
* running sum of the total number of dex insns (actually code
* units) processed
*/
public static int dexRunningTotalInsns = 0;
/** running sum of original class bytecode bytes */
public static int runningOriginalBytes = 0;
/**
* This class is uninstantiable.
*/
private CodeStatistics() {
// This space intentionally left blank.
}
/**
* Updates the number of original bytecode bytes processed.
*
* @param count {@code >= 0;} the number of bytes to add
*/
public static void updateOriginalByteCount(int count) {
runningOriginalBytes += count;
}
/**
* Updates the dex statistics.
*
* @param nonOptCode non-optimized code block
* @param code optimized code block
*/
public static void updateDexStatistics(DalvCode nonOptCode,
DalvCode code) {
if (DEBUG) {
System.err.println("dex insns (old/new) "
+ nonOptCode.getInsns().codeSize()
+ "/" + code.getInsns().codeSize()
+ " regs (o/n) "
+ nonOptCode.getInsns().getRegistersSize()
+ "/" + code.getInsns().getRegistersSize()
);
}
dexRunningDeltaInsns
+= (code.getInsns().codeSize()
- nonOptCode.getInsns().codeSize());
dexRunningDeltaRegisters
+= (code.getInsns().getRegistersSize()
- nonOptCode.getInsns().getRegistersSize());
dexRunningTotalInsns += code.getInsns().codeSize();
}
/**
* Updates the ROP statistics.
*
* @param nonOptRmeth non-optimized method
* @param rmeth optimized method
*/
public static void updateRopStatistics(RopMethod nonOptRmeth,
RopMethod rmeth) {
int oldCountInsns
= nonOptRmeth.getBlocks().getEffectiveInstructionCount();
int oldCountRegs = nonOptRmeth.getBlocks().getRegCount();
if (DEBUG) {
System.err.println("insns (old/new): "
+ oldCountInsns + "/"
+ rmeth.getBlocks().getEffectiveInstructionCount()
+ " regs (o/n):" + oldCountRegs
+ "/" + rmeth.getBlocks().getRegCount());
}
int newCountInsns
= rmeth.getBlocks().getEffectiveInstructionCount();
runningDeltaInsns
+= (newCountInsns - oldCountInsns);
runningDeltaRegisters
+= (rmeth.getBlocks().getRegCount() - oldCountRegs);
runningTotalInsns += newCountInsns;
}
/**
* Prints out the collected statistics.
*
* @param out {@code non-null;} where to output to
*/
public static void dumpStatistics(PrintStream out) {
out.printf("Optimizer Delta Rop Insns: %d total: %d "
+ "(%.2f%%) Delta Registers: %d\n",
runningDeltaInsns,
runningTotalInsns,
(100.0 * (((float) runningDeltaInsns)
/ (runningTotalInsns + Math.abs(runningDeltaInsns)))),
runningDeltaRegisters);
out.printf("Optimizer Delta Dex Insns: Insns: %d total: %d "
+ "(%.2f%%) Delta Registers: %d\n",
dexRunningDeltaInsns,
dexRunningTotalInsns,
(100.0 * (((float) dexRunningDeltaInsns)
/ (dexRunningTotalInsns
+ Math.abs(dexRunningDeltaInsns)))),
dexRunningDeltaRegisters);
out.printf("Original bytecode byte count: %d\n",
runningOriginalBytes);
}
}
|
