Mercurial > hg > graal-compiler
annotate agent/src/share/classes/sun/jvm/hotspot/asm/sparc/SPARCDisassembler.java @ 2177:3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
Summary: move symbols from permgen into C heap and reference count them
Reviewed-by: never, acorn, jmasa, stefank
author | coleenp |
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date | Thu, 27 Jan 2011 16:11:27 -0800 |
parents | c18cbe5936b8 |
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rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 package sun.jvm.hotspot.asm.sparc; | |
26 | |
27 import sun.jvm.hotspot.asm.*; | |
28 import java.io.*; | |
29 import java.util.*; | |
30 | |
31 public abstract class SPARCDisassembler extends Disassembler | |
32 implements /* imports */ SPARCOpcodes, RTLDataTypes, RTLOperations { | |
33 | |
34 // instruction cache - Map<Integer, Instruction>. | |
35 protected static Map instructionCache = new HashMap(); | |
36 protected final SPARCInstructionFactory factory; | |
37 | |
38 public SPARCDisassembler(long startPc, byte[] code, SPARCInstructionFactory factory) { | |
39 super(startPc, code); | |
40 this.factory = factory; | |
41 } | |
42 | |
43 protected static InstructionDecoder illegalDecoder = new IllegalInstructionDecoder(); | |
44 protected static InstructionDecoder callDecoder = new CallDecoder(); | |
45 | |
46 // direct call instruction | |
47 protected Instruction decodeFormat1Instruction(int instruction) { | |
48 return callDecoder.decode(instruction, factory); | |
49 } | |
50 | |
51 protected abstract InstructionDecoder getFormat2Decoder(int op2); | |
52 | |
53 protected Instruction decodeFormat2Instruction(int instruction) { | |
54 int op2 = (instruction & OP_2_MASK) >>> OP_2_START_BIT; | |
55 InstructionDecoder decoder = getFormat2Decoder(op2); | |
56 return decoder.decode(instruction, factory); | |
57 } | |
58 | |
59 // "op3" - used in format 3 & 3A instructions - 6 bits width | |
60 | |
61 protected static int getOp3(int instruction) { | |
62 return (instruction & OP_3_MASK) >>> OP_3_START_BIT; | |
63 } | |
64 | |
65 // op3 opcodes is broken up into column and row. MSB 2 bits form column. | |
66 // LSB 4 bits form row number. | |
67 | |
68 protected static int getOp3Row(int op3) { | |
69 return op3 & 0xF; | |
70 } | |
71 | |
72 protected static int getOp3Column(int op3) { | |
73 return (op3 >>> 4) & 0x3; | |
74 } | |
75 | |
76 protected abstract InstructionDecoder getFormat3Decoder(int row, int column); | |
77 | |
78 // memory instructions | |
79 protected Instruction decodeFormat3Instruction(int instruction) { | |
80 int op3 = getOp3(instruction); | |
81 int row = getOp3Row(op3); | |
82 int column = getOp3Column(op3); | |
83 return getFormat3Decoder(row, column).decode(instruction, factory); | |
84 } | |
85 | |
86 protected abstract InstructionDecoder getFormat3ADecoder(int row, int column); | |
87 | |
88 // arithmetic, logic, shift and the rest | |
89 protected Instruction decodeFormat3AInstruction(int instruction) { | |
90 int op3 = getOp3(instruction); | |
91 int row = getOp3Row(op3); | |
92 int column = getOp3Column(op3); | |
93 return getFormat3ADecoder(row, column).decode(instruction, factory); | |
94 } | |
95 | |
96 public void decode(InstructionVisitor visitor) { | |
97 visitor.prologue(); | |
98 try { | |
99 DataInputStream dis = new DataInputStream(new ByteArrayInputStream(code)); | |
100 int instruction = -1; | |
101 int format = -1; | |
102 Instruction instr = null; | |
103 int len = 0; | |
104 | |
105 while (len < code.length) { | |
106 instr = null; | |
107 instruction = dis.readInt(); | |
108 // check whether we have this in cache. | |
109 instr = (Instruction) instructionCache.get(new Integer(instruction)); | |
110 if (instr == null) { | |
111 format = (instruction & FORMAT_MASK) >>> FORMAT_START_BIT; | |
112 | |
113 switch (format) { | |
114 case FORMAT_2: // 0 | |
115 instr = decodeFormat2Instruction(instruction); | |
116 break; | |
117 | |
118 case FORMAT_1: // 1 | |
119 instr = decodeFormat1Instruction(instruction); | |
120 break; | |
121 | |
122 case FORMAT_3A: // 2 | |
123 instr = decodeFormat3AInstruction(instruction); | |
124 break; | |
125 | |
126 case FORMAT_3: // 3 | |
127 instr = decodeFormat3Instruction(instruction); | |
128 break; | |
129 } | |
130 | |
131 // add the new instruction to cache. | |
132 instructionCache.put(new Integer(instruction), instr); | |
133 } | |
134 | |
135 visitor.visit(startPc + len, instr); | |
136 len += 4; | |
137 } | |
138 } catch (IOException ioExp) { | |
139 // ignore, can't happen | |
140 } finally { | |
141 visitor.epilogue(); | |
142 } | |
143 } | |
144 } |