Mercurial > hg > graal-compiler
annotate agent/src/share/classes/sun/jvm/hotspot/runtime/SignatureIterator.java @ 1552:c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair
| author | trims |
|---|---|
| date | Thu, 27 May 2010 19:08:38 -0700 |
| parents | bc32f286fae0 |
| children |
| rev | line source |
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| 0 | 1 /* |
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6941466: Oracle rebranding changes for Hotspot repositories
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2 * Copyright (c) 2001, 2010, 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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6941466: Oracle rebranding changes for Hotspot repositories
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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parents:
1385
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20 * or visit www.oracle.com if you need additional information or have any |
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c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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parents:
1385
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.runtime; | |
| 26 | |
| 27 import sun.jvm.hotspot.oops.*; | |
| 28 | |
| 29 /** <P> SignatureIterators iterate over a Java signature (or parts of it). | |
| 30 (Syntax according to: "The Java Virtual Machine Specification" by | |
| 31 Tim Lindholm & Frank Yellin; section 4.3 Descriptors; p. 89ff.) </P> | |
| 32 | |
| 33 <P> Example: Iterating over | |
| 34 <PRE> | |
| 35 ([Lfoo;D)I | |
| 36 0123456789 | |
| 37 </PRE> | |
| 38 | |
| 39 using </P> | |
| 40 | |
| 41 <PRE> | |
| 42 iterateParameters() calls: do_array(2, 7); do_double(); | |
| 43 iterateReturntype() calls: do_int(); | |
| 44 iterate() calls: do_array(2, 7); do_double(); do_int(); | |
| 45 | |
| 46 is_returnType() is: false ; false ; true | |
| 47 </PRE> | |
| 48 */ | |
| 49 | |
| 50 public abstract class SignatureIterator { | |
| 51 protected Symbol _signature; // the signature to iterate over | |
| 52 protected int _index; // the current character index (only valid during iteration) | |
| 53 protected int _parameter_index; // the current parameter index (0 outside iteration phase) | |
| 54 | |
| 55 protected void expect(char c) { | |
| 56 if (_signature.getByteAt(_index) != (byte) c) { | |
| 57 throw new RuntimeException("expecting '" + c + "'"); | |
| 58 } | |
| 59 _index++; | |
| 60 } | |
| 61 protected void skipOptionalSize() { | |
| 62 byte c = _signature.getByteAt(_index); | |
| 63 while ('0' <= c && c <= '9') { | |
| 64 c = _signature.getByteAt(++_index); | |
| 65 } | |
| 66 } | |
| 67 // returns the parameter size in words (0 for void) | |
| 68 protected int parseType() { | |
| 69 switch(_signature.getByteAt(_index)) { | |
| 70 case 'B': doByte (); _index++; return BasicTypeSize.getTByteSize(); | |
| 71 case 'C': doChar (); _index++; return BasicTypeSize.getTCharSize(); | |
| 72 case 'D': doDouble(); _index++; return BasicTypeSize.getTDoubleSize(); | |
| 73 case 'F': doFloat (); _index++; return BasicTypeSize.getTFloatSize(); | |
| 74 case 'I': doInt (); _index++; return BasicTypeSize.getTIntSize(); | |
| 75 case 'J': doLong (); _index++; return BasicTypeSize.getTLongSize(); | |
| 76 case 'S': doShort (); _index++; return BasicTypeSize.getTShortSize(); | |
| 77 case 'Z': doBool (); _index++; return BasicTypeSize.getTBooleanSize(); | |
| 78 case 'V': | |
| 79 { | |
| 80 if (!isReturnType()) { | |
| 81 throw new RuntimeException("illegal parameter type V (void)"); | |
| 82 } | |
| 83 | |
| 84 doVoid(); _index++; | |
| 85 return BasicTypeSize.getTVoidSize(); | |
| 86 } | |
| 87 case 'L': | |
| 88 { | |
| 89 int begin = ++_index; | |
| 90 while (_signature.getByteAt(_index++) != ';') ; | |
| 91 doObject(begin, _index); | |
| 92 return BasicTypeSize.getTObjectSize(); | |
| 93 } | |
| 94 case '[': | |
| 95 { | |
| 96 int begin = ++_index; | |
| 97 skipOptionalSize(); | |
| 98 while (_signature.getByteAt(_index) == '[') { | |
| 99 _index++; | |
| 100 skipOptionalSize(); | |
| 101 } | |
| 102 if (_signature.getByteAt(_index) == 'L') { | |
| 103 while (_signature.getByteAt(_index++) != ';') ; | |
| 104 } else { | |
| 105 _index++; | |
| 106 } | |
| 107 doArray(begin, _index); | |
| 108 return BasicTypeSize.getTArraySize(); | |
| 109 } | |
| 110 } | |
| 1385 | 111 throw new RuntimeException("Should not reach here: char " + (char)_signature.getByteAt(_index) + " @ " + _index + " in " + _signature.asString()); |
| 0 | 112 } |
| 113 protected void checkSignatureEnd() { | |
| 114 if (_index < _signature.getLength()) { | |
| 115 System.err.println("too many chars in signature"); | |
| 116 _signature.printValueOn(System.err); | |
| 117 System.err.println(" @ " + _index); | |
| 118 } | |
| 119 } | |
| 120 | |
| 121 public SignatureIterator(Symbol signature) { | |
| 122 _signature = signature; | |
| 123 _parameter_index = 0; | |
| 124 } | |
| 125 | |
| 126 // | |
| 127 // Iteration | |
| 128 // | |
| 129 | |
| 130 // dispatches once for field signatures | |
| 131 public void dispatchField() { | |
| 132 // no '(', just one (field) type | |
| 133 _index = 0; | |
| 134 _parameter_index = 0; | |
| 135 parseType(); | |
| 136 checkSignatureEnd(); | |
| 137 } | |
| 138 | |
| 139 // iterates over parameters only | |
| 140 public void iterateParameters() { | |
| 141 // Parse parameters | |
| 142 _index = 0; | |
| 143 _parameter_index = 0; | |
| 144 expect('('); | |
| 145 while (_signature.getByteAt(_index) != ')') { | |
| 146 _parameter_index += parseType(); | |
| 147 } | |
| 148 expect(')'); | |
| 149 _parameter_index = 0; // so isReturnType() is false outside iteration | |
| 150 } | |
| 151 | |
| 152 // iterates over returntype only | |
| 153 public void iterateReturntype() { | |
| 154 // Ignore parameters | |
| 155 _index = 0; | |
| 156 expect('('); | |
| 157 while (_signature.getByteAt(_index) != ')') { | |
| 158 _index++; | |
| 159 } | |
| 160 expect(')'); | |
| 161 // Parse return type | |
| 162 _parameter_index = -1; | |
| 163 parseType(); | |
| 164 checkSignatureEnd(); | |
| 165 _parameter_index = 0; // so isReturnType() is false outside iteration | |
| 166 } | |
| 167 | |
| 168 // iterates over whole signature | |
| 169 public void iterate() { | |
| 170 // Parse parameters | |
| 171 _index = 0; | |
| 172 _parameter_index = 0; | |
| 173 expect('('); | |
| 174 while (_signature.getByteAt(_index) != ')') { | |
| 175 _parameter_index += parseType(); | |
| 176 } | |
| 177 expect(')'); | |
| 178 // Parse return type | |
| 179 _parameter_index = -1; | |
| 180 parseType(); | |
| 181 checkSignatureEnd(); | |
| 182 _parameter_index = 0; // so isReturnType() is false outside iteration | |
| 183 } | |
| 184 | |
| 185 // Returns the word index of the current parameter; returns a negative value at the return type | |
| 186 public int parameterIndex() { return _parameter_index; } | |
| 187 public boolean isReturnType() { return (parameterIndex() < 0); } | |
| 188 | |
| 189 // Basic types | |
| 190 public abstract void doBool (); | |
| 191 public abstract void doChar (); | |
| 192 public abstract void doFloat (); | |
| 193 public abstract void doDouble(); | |
| 194 public abstract void doByte (); | |
| 195 public abstract void doShort (); | |
| 196 public abstract void doInt (); | |
| 197 public abstract void doLong (); | |
| 198 public abstract void doVoid (); | |
| 199 | |
| 200 // Object types (begin indexes the first character of the entry, end | |
| 201 // indexes the first character after the entry) | |
| 202 public abstract void doObject(int begin, int end); | |
| 203 public abstract void doArray (int begin, int end); | |
| 204 } |