Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/interpreter/OopMapCacheEntry.java @ 2042:0a8e0d4345b3 hs20-b05 jdk7-b124
7010068: Update all 2010 Oracle-changed OpenJDK files to have the proper copyright dates - first pass
Summary: Update the copyright to be 2010 on all changed files in OpenJDK
Reviewed-by: jcoomes
| author | trims |
|---|---|
| date | Mon, 03 Jan 2011 15:30:05 -0800 |
| parents | c18cbe5936b8 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
2 * Copyright (c) 2001, 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 * | |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
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 OopMapCacheEntry { | |
| 31 // Iteration | |
| 32 public boolean isValue(int offset) { return !entryAt(offset); } | |
| 33 public boolean isOop (int offset) { return entryAt(offset); } | |
| 34 public void iterateOop(OffsetClosure oopClosure) { | |
| 35 int n = numberOfEntries(); | |
| 36 for (int i = 0; i < n; i++) { | |
| 37 if (entryAt(i)) { | |
| 38 oopClosure.offsetDo(i); | |
| 39 } | |
| 40 } | |
| 41 } | |
| 42 | |
| 43 // Initialization | |
| 44 public void fill(Method method, int bci) { | |
| 45 this.method = method; | |
| 46 this.bci = bci; | |
| 47 if (method.isNative()) { | |
| 48 // Native method activations have oops only among the parameters and one | |
| 49 // extra oop following the parameters (the mirror for static native methods). | |
| 50 fillForNative(); | |
| 51 } else { | |
| 52 OopMapForCacheEntry gen = new OopMapForCacheEntry(method, bci, this); | |
| 53 gen.computeMap(); | |
| 54 } | |
| 55 } | |
| 56 | |
| 57 public void setMask(CellTypeStateList vars, | |
| 58 CellTypeStateList stack, | |
| 59 int stackTop) { | |
| 60 // compute bit mask size | |
| 61 int maxLocals = (int) method.getMaxLocals(); | |
| 62 int nEntries = maxLocals + stackTop; | |
| 63 maskSize = nEntries; | |
| 64 allocateBitMask(); | |
| 65 | |
| 66 CellTypeStateList curList = vars; | |
| 67 int listIdx = 0; | |
| 68 | |
| 69 for (int entryIdx = 0; entryIdx < nEntries; entryIdx++, listIdx++) { | |
| 70 // switch to stack when done with locals | |
| 71 if (entryIdx == maxLocals) { | |
| 72 curList = stack; | |
| 73 listIdx = 0; | |
| 74 } | |
| 75 | |
| 76 CellTypeState cell = curList.get(listIdx); | |
| 77 // set oop bit | |
| 78 if ( cell.isReference()) { | |
| 79 mask.atPut(entryIdx, true); | |
| 80 } | |
| 81 } | |
| 82 | |
| 83 // verify bit mask | |
| 84 if (Assert.ASSERTS_ENABLED) { | |
| 85 Assert.that(verifyMask(vars, stack, maxLocals, stackTop), "mask could not be verified"); | |
| 86 } | |
| 87 } | |
| 88 | |
| 89 //---------------------------------------------------------------------- | |
| 90 // Internals only below this point | |
| 91 // | |
| 92 private Method method; // the method for which the mask is valid | |
| 93 private int bci; // the bci for which the mask is valid | |
| 94 private int maskSize; // the required mask size in bits | |
| 95 private BitMap mask; // may be null if mask is empty | |
| 96 | |
| 97 Method method() { return method; } | |
| 98 int bci() { return bci; } | |
| 99 int numberOfEntries() { return maskSize; } | |
| 100 boolean entryAt(int offset) { | |
| 101 return mask.at(offset); | |
| 102 } | |
| 103 | |
| 104 void setEmptyMask() { mask = null; } | |
| 105 void allocateBitMask() { | |
| 106 if (maskSize > 0) { | |
| 107 mask = new BitMap(maskSize); | |
| 108 } | |
| 109 } | |
| 110 | |
| 111 // fills the bit mask for native calls | |
| 112 void fillForNative() { | |
| 113 if (Assert.ASSERTS_ENABLED) { | |
| 114 Assert.that(method.isNative(), "method must be native method"); | |
| 115 } | |
| 116 maskSize = (int) method.getSizeOfParameters(); | |
| 117 allocateBitMask(); | |
| 118 // fill mask for parameters | |
| 119 MaskFillerForNative mf = new MaskFillerForNative(method, mask, maskSize); | |
| 120 mf.generate(); | |
| 121 } | |
| 122 | |
| 123 static class VerifyClosure implements OffsetClosure { | |
| 124 private OopMapCacheEntry entry; | |
| 125 private boolean failed; | |
| 126 | |
| 127 VerifyClosure(OopMapCacheEntry entry) { this.entry = entry; } | |
| 128 public void offsetDo(int offset) { if (!entry.isOop(offset)) failed = true; } | |
| 129 boolean failed() { return failed; } | |
| 130 } | |
| 131 | |
| 132 boolean verifyMask(CellTypeStateList vars, CellTypeStateList stack, int maxLocals, int stackTop) { | |
| 133 // Check mask includes map | |
| 134 VerifyClosure blk = new VerifyClosure(this); | |
| 135 iterateOop(blk); | |
| 136 if (blk.failed()) return false; | |
| 137 | |
| 138 // Check if map is generated correctly | |
| 139 for(int i = 0; i < maxLocals; i++) { | |
| 140 boolean v1 = isOop(i); | |
| 141 boolean v2 = vars.get(i).isReference(); | |
| 142 if (Assert.ASSERTS_ENABLED) { | |
| 143 Assert.that(v1 == v2, "locals oop mask generation error"); | |
| 144 } | |
| 145 } | |
| 146 | |
| 147 for(int j = 0; j < stackTop; j++) { | |
| 148 boolean v1 = isOop(maxLocals + j); | |
| 149 boolean v2 = stack.get(j).isReference(); | |
| 150 if (Assert.ASSERTS_ENABLED) { | |
| 151 Assert.that(v1 == v2, "stack oop mask generation error"); | |
| 152 } | |
| 153 } | |
| 154 return true; | |
| 155 } | |
| 156 } |