Mercurial > hg > graal-compiler
annotate agent/src/share/classes/sun/jvm/hotspot/interpreter/Bytecode.java @ 3838:6a991dcb52bb
7012081: JSR 292: SA-JDI can't read MH/MT/Indy ConstantPool entries
Reviewed-by: kvn, twisti, jrose
| author | never |
|---|---|
| date | Thu, 21 Jul 2011 08:38:25 -0700 |
| parents | c18cbe5936b8 |
| children |
| rev | line source |
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| 0 | 1 /* |
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2 * Copyright (c) 2001, 2004, 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 |
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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.interpreter; | |
| 26 | |
| 27 import sun.jvm.hotspot.oops.*; | |
| 28 import sun.jvm.hotspot.utilities.*; | |
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29 import sun.jvm.hotspot.runtime.VM; |
| 0 | 30 |
| 31 public class Bytecode { | |
| 32 Method method; | |
| 33 int bci; | |
| 34 static final int jintSize = 4; | |
| 35 static final String spaces = " "; | |
| 36 static final String comma = ", "; | |
| 37 | |
| 38 Bytecode(Method method, int bci) { | |
| 39 this.method = method; | |
| 40 this.bci = bci; | |
| 41 } | |
| 42 | |
| 43 // Address computation | |
| 44 // NOTE: assumes that the start of the method's bytecodes is 4-byte aligned | |
| 45 int alignedOffset(int offset) { | |
| 46 return Bits.roundTo(bci + offset, jintSize) - bci; | |
| 47 } | |
| 48 | |
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49 public int getIndexU1() { return method.getBytecodeOrBPAt(bci() + 1) & 0xFF; } |
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50 public int getIndexU2(int bc, boolean isWide) { |
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51 if (can_use_native_byte_order(bc, isWide)) { |
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52 return method.getNativeShortArg(bci() + (isWide ? 2 : 1)) & 0xFFFF; |
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53 } |
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54 return method.getBytecodeShortArg(bci() + (isWide ? 2 : 1)) & 0xFFFF; |
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55 } |
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56 public int getIndexU4() { return method.getNativeIntArg(bci() + 1); } |
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57 public boolean hasIndexU4() { return code() == Bytecodes._invokedynamic; } |
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58 |
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59 public int getIndexU1Cpcache() { return method.getBytecodeOrBPAt(bci() + 1) & 0xFF; } |
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60 public int getIndexU2Cpcache() { return method.getNativeShortArg(bci() + 1) & 0xFFFF; } |
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61 |
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62 static boolean can_use_native_byte_order(int bc, boolean is_wide) { |
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63 return (VM.getVM().isBigEndian() || Bytecodes.native_byte_order(bc /*, is_wide*/)); |
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64 } |
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65 |
| 0 | 66 int javaSignedWordAt(int offset) { |
| 67 return method.getBytecodeIntArg(bci + offset); | |
| 68 } | |
| 69 | |
| 70 short javaShortAt(int offset) { | |
| 71 return method.getBytecodeShortArg(bci + offset); | |
| 72 } | |
| 73 | |
| 74 byte javaByteAt(int offset) { | |
| 75 return method.getBytecodeByteArg(bci + offset); | |
| 76 } | |
| 77 | |
| 78 public Method method() { return method; } | |
| 79 public int bci() { return bci; } | |
| 80 | |
| 81 // hotspot byte code | |
| 82 public int code() { | |
| 83 return Bytecodes.codeAt(method(), bci()); | |
| 84 } | |
| 85 | |
| 86 // jvm byte code | |
| 87 public int javaCode() { | |
| 88 return Bytecodes.javaCode(code()); | |
| 89 } | |
| 90 | |
| 91 public String getBytecodeName() { | |
| 92 return Bytecodes.name(code()); | |
| 93 } | |
| 94 | |
| 95 public String getJavaBytecodeName() { | |
| 96 return Bytecodes.name(javaCode()); | |
| 97 } | |
| 98 | |
| 99 public int getLength() { | |
| 100 return Bytecodes.lengthAt(method(), bci()); | |
| 101 } | |
| 102 | |
| 103 public int getJavaLength() { | |
| 104 return Bytecodes.javaLengthAt(method(), bci()); | |
| 105 } | |
| 106 | |
| 107 public String toString() { | |
| 108 StringBuffer buf = new StringBuffer(getJavaBytecodeName()); | |
| 109 if (code() != javaCode()) { | |
| 110 buf.append(spaces); | |
| 111 buf.append('['); | |
| 112 buf.append(getBytecodeName()); | |
| 113 buf.append(']'); | |
| 114 } | |
| 115 return buf.toString(); | |
| 116 } | |
| 117 } |