Skip to content

Navigation Menu

Sign in
Appearance settings

Search code, repositories, users, issues, pull requests...

Provide feedback

We read every piece of feedback, and take your input very seriously.

Saved searches

Use saved searches to filter your results more quickly
Appearance settings

Commit a410822

Browse filesBrowse files
author
hborders
committed
Added com.sun.cri.bytecode.* from Maxine.
1 parent 99d006a commit a410822
Copy full SHA for a410822

9 files changed

+3,471Lines changed: 3471 additions & 0 deletions

File tree

Expand file treeCollapse file tree
Open diff view settings
Filter options
Expand file treeCollapse file tree
Open diff view settings
Collapse file

‎JavaInJava/src/com/sun/cri/bytecode/BytecodeIntrinsifier.java‎

Copy file name to clipboardExpand all lines: JavaInJava/src/com/sun/cri/bytecode/BytecodeIntrinsifier.java
+994Lines changed: 994 additions & 0 deletions
Large diffs are not rendered by default.
Collapse file

‎JavaInJava/src/com/sun/cri/bytecode/BytecodeLookupSwitch.java‎

Copy file name to clipboard
+76Lines changed: 76 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,76 @@
1+
/*
2+
* Copyright (c) 2009 Sun Microsystems, Inc. All rights reserved.
3+
*
4+
* Sun Microsystems, Inc. has intellectual property rights relating to technology embodied in the product
5+
* that is described in this document. In particular, and without limitation, these intellectual property
6+
* rights may include one or more of the U.S. patents listed at http://www.sun.com/patents and one or
7+
* more additional patents or pending patent applications in the U.S. and in other countries.
8+
*
9+
* U.S. Government Rights - Commercial software. Government users are subject to the Sun
10+
* Microsystems, Inc. standard license agreement and applicable provisions of the FAR and its
11+
* supplements.
12+
*
13+
* Use is subject to license terms. Sun, Sun Microsystems, the Sun logo, Java and Solaris are trademarks or
14+
* registered trademarks of Sun Microsystems, Inc. in the U.S. and other countries. All SPARC trademarks
15+
* are used under license and are trademarks or registered trademarks of SPARC International, Inc. in the
16+
* U.S. and other countries.
17+
*
18+
* UNIX is a registered trademark in the U.S. and other countries, exclusively licensed through X/Open
19+
* Company, Ltd.
20+
*/
21+
package com.sun.cri.bytecode;
22+
23+
/**
24+
* A utility for processing {@link Bytecodes#LOOKUPSWITCH} bytecodes.
25+
*
26+
* @author Ben L. Titzer
27+
*/
28+
public class BytecodeLookupSwitch extends BytecodeSwitch {
29+
private static final int OFFSET_TO_NUMBER_PAIRS = 4;
30+
private static final int OFFSET_TO_FIRST_PAIR_MATCH = 8;
31+
private static final int OFFSET_TO_FIRST_PAIR_OFFSET = 12;
32+
private static final int PAIR_SIZE = 8;
33+
34+
/**
35+
* Constructor for a {@link BytecodeStream}.
36+
* @param stream the {@code BytecodeStream} containing the switch instruction
37+
* @param bci the index in the stream of the switch instruction
38+
*/
39+
public BytecodeLookupSwitch(BytecodeStream stream, int bci) {
40+
super(stream, bci);
41+
}
42+
43+
/**
44+
* Constructor for a bytecode array.
45+
* @param code the bytecode array containing the switch instruction.
46+
* @param bci the index in the array of the switch instruction
47+
*/
48+
public BytecodeLookupSwitch(byte[] code, int bci) {
49+
super(code, bci);
50+
}
51+
52+
@Override
53+
public int defaultOffset() {
54+
return readWord(alignedBci);
55+
}
56+
57+
@Override
58+
public int offsetAt(int i) {
59+
return readWord(alignedBci + OFFSET_TO_FIRST_PAIR_OFFSET + PAIR_SIZE * i);
60+
}
61+
62+
@Override
63+
public int keyAt(int i) {
64+
return readWord(alignedBci + OFFSET_TO_FIRST_PAIR_MATCH + PAIR_SIZE * i);
65+
}
66+
67+
@Override
68+
public int numberOfCases() {
69+
return readWord(alignedBci + OFFSET_TO_NUMBER_PAIRS);
70+
}
71+
72+
@Override
73+
public int size() {
74+
return alignedBci + OFFSET_TO_FIRST_PAIR_MATCH + PAIR_SIZE * numberOfCases() - bci;
75+
}
76+
}
Collapse file

‎JavaInJava/src/com/sun/cri/bytecode/BytecodeStream.java‎

Copy file name to clipboard
+196Lines changed: 196 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,196 @@
1+
/*
2+
* Copyright (c) 2009 Sun Microsystems, Inc. All rights reserved.
3+
*
4+
* Sun Microsystems, Inc. has intellectual property rights relating to technology embodied in the product
5+
* that is described in this document. In particular, and without limitation, these intellectual property
6+
* rights may include one or more of the U.S. patents listed at http://www.sun.com/patents and one or
7+
* more additional patents or pending patent applications in the U.S. and in other countries.
8+
*
9+
* U.S. Government Rights - Commercial software. Government users are subject to the Sun
10+
* Microsystems, Inc. standard license agreement and applicable provisions of the FAR and its
11+
* supplements.
12+
*
13+
* Use is subject to license terms. Sun, Sun Microsystems, the Sun logo, Java and Solaris are trademarks or
14+
* registered trademarks of Sun Microsystems, Inc. in the U.S. and other countries. All SPARC trademarks
15+
* are used under license and are trademarks or registered trademarks of SPARC International, Inc. in the
16+
* U.S. and other countries.
17+
*
18+
* UNIX is a registered trademark in the U.S. and other countries, exclusively licensed through X/Open
19+
* Company, Ltd.
20+
*/
21+
package com.sun.cri.bytecode;
22+
23+
/**
24+
* A utility class that makes iterating over bytecodes and reading operands
25+
* simpler and less error prone. For example, it handles the {@link Bytecodes#WIDE} instruction
26+
* and wide variants of instructions internally.
27+
*
28+
* @author Ben L. Titzer
29+
*/
30+
public class BytecodeStream {
31+
32+
final byte[] code;
33+
int opcode;
34+
int curBCI;
35+
int nextBCI;
36+
37+
/**
38+
* Creates a new {@code BytecodeStream} for the specified bytecode.
39+
* @param code the array of bytes that contains the bytecode
40+
*/
41+
public BytecodeStream(byte[] code) {
42+
this.code = code;
43+
setBCI(0);
44+
}
45+
46+
/**
47+
* Advances to the next bytecode.
48+
*/
49+
public void next() {
50+
setBCI(nextBCI);
51+
}
52+
53+
/**
54+
* Gets the next bytecode index (no side-effects).
55+
* @return the next bytecode index
56+
*/
57+
public int nextBCI() {
58+
return nextBCI;
59+
}
60+
61+
/**
62+
* Gets the current bytecode index.
63+
* @return the current bytecode index
64+
*/
65+
public int currentBCI() {
66+
return curBCI;
67+
}
68+
69+
/**
70+
* Gets the bytecode index of the end of the code.
71+
* @return the index of the end of the code
72+
*/
73+
public int endBCI() {
74+
return code.length;
75+
}
76+
77+
/**
78+
* Gets the current opcode. This method will never return the
79+
* {@link Bytecodes#WIDE WIDE} opcode, but will instead
80+
* return the opcode that is modified by the {@code WIDE} opcode.
81+
* @return the current opcode; {@link Bytecodes#END} if at or beyond the end of the code
82+
*/
83+
public int currentBC() {
84+
if (opcode == Bytecodes.WIDE) {
85+
return Bytes.beU1(code, curBCI + 1);
86+
} else {
87+
return opcode;
88+
}
89+
}
90+
91+
/**
92+
* Reads the index of a local variable for one of the load or store instructions.
93+
* The WIDE modifier is handled internally.
94+
* @return the index of the local variable
95+
*/
96+
public int readLocalIndex() {
97+
// read local variable index for load/store
98+
if (opcode == Bytecodes.WIDE) {
99+
return Bytes.beU2(code, curBCI + 2);
100+
}
101+
return Bytes.beU1(code, curBCI + 1);
102+
}
103+
104+
/**
105+
* Read the delta for an {@link Bytecodes#IINC} bytecode.
106+
* @return the delta for the {@code IINC}
107+
*/
108+
public int readIncrement() {
109+
// read the delta for the iinc bytecode
110+
if (opcode == Bytecodes.WIDE) {
111+
return Bytes.beS2(code, curBCI + 4);
112+
}
113+
return Bytes.beS1(code, curBCI + 2);
114+
}
115+
116+
/**
117+
* Read the destination of a {@link Bytecodes#GOTO} or {@code IF} instructions.
118+
* @return the destination bytecode index
119+
*/
120+
public int readBranchDest() {
121+
// reads the destination for a branch bytecode
122+
return curBCI + Bytes.beS2(code, curBCI + 1);
123+
}
124+
125+
/**
126+
* Read the destination of a {@link Bytecodes#GOTO_W} or {@link Bytecodes#JSR_W} instructions.
127+
* @return the destination bytecode index
128+
*/
129+
public int readFarBranchDest() {
130+
// reads the destination for a wide branch bytecode
131+
return curBCI + Bytes.beS4(code, curBCI + 2);
132+
}
133+
134+
/**
135+
* Read a signed 4-byte integer from the bytecode stream at the specified bytecode index.
136+
* @param bci the bytecode index
137+
* @return the integer value
138+
*/
139+
public int readInt(int bci) {
140+
// reads a 4-byte signed value
141+
return Bytes.beS4(code, bci);
142+
}
143+
144+
/**
145+
* Reads an unsigned, 1-byte value from the bytecode stream at the specified bytecode index.
146+
* @param bci the bytecode index
147+
* @return the byte
148+
*/
149+
public int readUByte(int bci) {
150+
return Bytes.beU1(code, bci);
151+
}
152+
153+
/**
154+
* Reads a constant pool index for the current instruction.
155+
* @return the constant pool index
156+
*/
157+
public char readCPI() {
158+
if (opcode == Bytecodes.LDC) {
159+
return (char) Bytes.beU1(code, curBCI + 1);
160+
}
161+
return (char) Bytes.beU2(code, curBCI + 1);
162+
}
163+
164+
/**
165+
* Reads a signed, 1-byte value for the current instruction (e.g. BIPUSH).
166+
* @return the byte
167+
*/
168+
public byte readByte() {
169+
return code[curBCI + 1];
170+
}
171+
172+
/**
173+
* Reads a signed, 2-byte short for the current instruction (e.g. SIPUSH).
174+
* @return the short value
175+
*/
176+
public short readShort() {
177+
return (short) Bytes.beS2(code, curBCI + 1);
178+
}
179+
180+
/**
181+
* Sets the bytecode index to the specified value.
182+
* If {@code bci} is beyond the end of the array, {@link #currentBC} will return
183+
* {@link Bytecodes#END} and other methods may throw {@link ArrayIndexOutOfBoundsException}.
184+
* @param bci the new bytecode index
185+
*/
186+
public void setBCI(int bci) {
187+
curBCI = bci;
188+
if (curBCI < code.length) {
189+
opcode = Bytes.beU1(code, bci);
190+
nextBCI = bci + Bytecodes.lengthOf(code, bci);
191+
} else {
192+
opcode = Bytecodes.END;
193+
nextBCI = curBCI;
194+
}
195+
}
196+
}

0 commit comments

Comments
0 (0)
Morty Proxy This is a proxified and sanitized view of the page, visit original site.