Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/interpreter/BytecodeStore.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 |
|---|---|
| date | Thu, 27 Jan 2011 16:11:27 -0800 |
| parents | c18cbe5936b8 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
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6941466: Oracle rebranding changes for Hotspot repositories
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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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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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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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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.*; | |
| 29 | |
| 30 public class BytecodeStore extends BytecodeLoadStore { | |
| 31 BytecodeStore(Method method, int bci) { | |
| 32 super(method, bci); | |
| 33 } | |
| 34 | |
| 35 public void verify() { | |
| 36 if (Assert.ASSERTS_ENABLED) { | |
| 37 Assert.that(isValid(), "check store"); | |
| 38 } | |
| 39 } | |
| 40 | |
| 41 public boolean isValid() { | |
| 42 int jcode = javaCode(); | |
| 43 switch (jcode) { | |
| 44 case Bytecodes._istore: | |
| 45 case Bytecodes._lstore: | |
| 46 case Bytecodes._fstore: | |
| 47 case Bytecodes._dstore: | |
| 48 case Bytecodes._astore: | |
| 49 return true; | |
| 50 default: | |
| 51 return false; | |
| 52 } | |
| 53 } | |
| 54 | |
| 55 public static BytecodeStore at(Method method, int bci) { | |
| 56 BytecodeStore b = new BytecodeStore(method, bci); | |
| 57 if (Assert.ASSERTS_ENABLED) { | |
| 58 b.verify(); | |
| 59 } | |
| 60 return b; | |
| 61 } | |
| 62 | |
| 63 /** Like at, but returns null if the BCI is not at store */ | |
| 64 public static BytecodeStore atCheck(Method method, int bci) { | |
| 65 BytecodeStore b = new BytecodeStore(method, bci); | |
| 66 return (b.isValid() ? b : null); | |
| 67 } | |
| 68 | |
| 69 public static BytecodeStore at(BytecodeStream bcs) { | |
| 70 return new BytecodeStore(bcs.method(), bcs.bci()); | |
| 71 } | |
| 72 } |