Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/debugger/Page.java @ 1913:3b2dea75431e
6984311: JSR 292 needs optional bootstrap method parameters
Summary: Allow CONSTANT_InvokeDynamic nodes to have any number of extra operands.
Reviewed-by: twisti
| author | jrose |
|---|---|
| date | Sat, 30 Oct 2010 13:08:23 -0700 |
| 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) 2000, 2003, 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.debugger; | |
| 26 | |
| 27 /** A class representing an arbitrary-sized page which can be linked | |
| 28 into a list. Used by the PageCache. */ | |
| 29 | |
| 30 public class Page { | |
| 31 private long baseAddress; | |
| 32 private byte[] data; | |
| 33 private Page prev; | |
| 34 private Page next; | |
| 35 private long unmappedPageLength; | |
| 36 | |
| 37 /** The length of the data[] array implicitly defines the size of the | |
| 38 page. */ | |
| 39 public Page(long baseAddress, byte[] data) { | |
| 40 this.baseAddress = baseAddress; | |
| 41 this.data = data; | |
| 42 } | |
| 43 | |
| 44 /** This constructor creates an "unmapped" page of the specified | |
| 45 length. Fetches from this page will cause -1 to be inserted into | |
| 46 the destination buffer. */ | |
| 47 public Page(long baseAddress, long unmappedPageLength) { | |
| 48 this.baseAddress = baseAddress; | |
| 49 this.unmappedPageLength = unmappedPageLength; | |
| 50 } | |
| 51 | |
| 52 public long getBaseAddress() { | |
| 53 return baseAddress; | |
| 54 } | |
| 55 | |
| 56 public long getSize() { | |
| 57 if (data != null) { | |
| 58 return data.length; | |
| 59 } else { | |
| 60 return unmappedPageLength; | |
| 61 } | |
| 62 } | |
| 63 | |
| 64 /** Indicates whether this page is mapped in the remote process's | |
| 65 address space */ | |
| 66 public boolean isMapped() { | |
| 67 return (data != null); | |
| 68 } | |
| 69 | |
| 70 public Page getPrev() { | |
| 71 return prev; | |
| 72 } | |
| 73 | |
| 74 public void setPrev(Page prev) { | |
| 75 this.prev = prev; | |
| 76 } | |
| 77 | |
| 78 public Page getNext() { | |
| 79 return next; | |
| 80 } | |
| 81 | |
| 82 public void setNext(Page next) { | |
| 83 this.next = next; | |
| 84 } | |
| 85 | |
| 86 /** Throws IndexOutOfBoundsException if the number of bytes | |
| 87 requested is greater than the page size, or if the start address | |
| 88 doesn't fall within the page. There are no guarantees on whether | |
| 89 any data was actually fetched if an IndexOutOfBoundsException is | |
| 90 thrown. If this page is unmapped, -1 is returned for all | |
| 91 addresses on this page. */ | |
| 92 public void getData(long startAddress, long numBytes, | |
| 93 int[] destBuf, long destBufOffset) | |
| 94 throws IndexOutOfBoundsException { | |
| 95 int startOffset = (int) (startAddress - baseAddress); | |
| 96 if ((data == null) && | |
| 97 ((startOffset < 0) || ((startOffset + numBytes) > (baseAddress + unmappedPageLength)))) { | |
| 98 throw new IndexOutOfBoundsException("startAddress = " + startAddress + | |
| 99 ", baseAddress = " + baseAddress + | |
| 100 ", unmappedPageLength = " + unmappedPageLength); | |
| 101 } | |
| 102 for (int i = 0; i < (int) numBytes; ++i) { | |
| 103 if (data != null) { | |
| 104 destBuf[i + (int) destBufOffset] = ((int) (data[i + startOffset]) & 0x000000FF); | |
| 105 } else { | |
| 106 destBuf[i + (int) destBufOffset] = -1; | |
| 107 } | |
| 108 } | |
| 109 } | |
| 110 | |
| 111 /** Throws IndexOutOfBoundsException if the number of bytes | |
| 112 requested is greater than the page size, or if the start address | |
| 113 doesn't fall within the page. There are no guarantees on whether | |
| 114 any data was actually fetched if an IndexOutOfBoundsException is | |
| 115 thrown. If this page is unmapped, throws a RuntimeException; | |
| 116 this should be watched for at higher levels. */ | |
| 117 public void getDataAsBytes(long startAddress, long numBytes, | |
| 118 byte[] destBuf, long destBufOffset) | |
| 119 throws IndexOutOfBoundsException { | |
| 120 long startOffset = startAddress - baseAddress; | |
| 121 if (data == null) { | |
| 122 throw new RuntimeException("Bug in PageCache; should not fetch from unmapped pages using getDataAsBytes"); | |
| 123 } | |
| 124 System.arraycopy(data, (int) startOffset, destBuf, (int) destBufOffset, (int) numBytes); | |
| 125 } | |
| 126 | |
| 127 public boolean getBoolean(long address) { | |
| 128 return (getByte(address) != 0); | |
| 129 } | |
| 130 | |
| 131 public byte getByte(long address) { | |
| 132 return data[(int) address - (int) baseAddress]; | |
| 133 } | |
| 134 | |
| 135 public short getShort(long address, boolean bigEndian) { | |
| 136 int start = (int) address - (int) baseAddress; | |
| 137 if (bigEndian) { | |
| 138 return (short) | |
| 139 (((data[start + 1] & 0xFF)) | | |
| 140 ((data[start] & 0xFF) << 8)); | |
| 141 } else { | |
| 142 return (short) | |
| 143 (((data[start + 1] & 0xFF) << 8) | | |
| 144 ((data[start] & 0xFF))); | |
| 145 } | |
| 146 } | |
| 147 | |
| 148 public char getChar(long address, boolean bigEndian) { | |
| 149 return (char) getShort(address, bigEndian); | |
| 150 } | |
| 151 | |
| 152 public int getInt(long address, boolean bigEndian) { | |
| 153 int start = (int) address - (int) baseAddress; | |
| 154 if (bigEndian) { | |
| 155 return | |
| 156 ((data[start + 3] & 0xFF)) | | |
| 157 ((data[start + 2] & 0xFF) << 8) | | |
| 158 ((data[start + 1] & 0xFF) << 16) | | |
| 159 ((data[start] & 0xFF) << 24); | |
| 160 } else { | |
| 161 return | |
| 162 ((data[start + 3] & 0xFF) << 24) | | |
| 163 ((data[start + 2] & 0xFF) << 16) | | |
| 164 ((data[start + 1] & 0xFF) << 8) | | |
| 165 ((data[start] & 0xFF)); | |
| 166 } | |
| 167 } | |
| 168 | |
| 169 public long getLong(long address, boolean bigEndian) { | |
| 170 int start = (int) address - (int) baseAddress; | |
| 171 if (bigEndian) { | |
| 172 return | |
| 173 ((data[start + 7] & 0xFFL)) | | |
| 174 ((data[start + 6] & 0xFFL) << 8) | | |
| 175 ((data[start + 5] & 0xFFL) << 16) | | |
| 176 ((data[start + 4] & 0xFFL) << 24) | | |
| 177 ((data[start + 3] & 0xFFL) << 32) | | |
| 178 ((data[start + 2] & 0xFFL) << 40) | | |
| 179 ((data[start + 1] & 0xFFL) << 48) | | |
| 180 ((data[start] & 0xFFL) << 56); | |
| 181 } else { | |
| 182 return | |
| 183 ((data[start + 7] & 0xFFL) << 56) | | |
| 184 ((data[start + 6] & 0xFFL) << 48) | | |
| 185 ((data[start + 5] & 0xFFL) << 40) | | |
| 186 ((data[start + 4] & 0xFFL) << 32) | | |
| 187 ((data[start + 3] & 0xFFL) << 24) | | |
| 188 ((data[start + 2] & 0xFFL) << 16) | | |
| 189 ((data[start + 1] & 0xFFL) << 8) | | |
| 190 ((data[start] & 0xFFL)); | |
| 191 } | |
| 192 } | |
| 193 | |
| 194 public float getFloat(long address, boolean bigEndian) { | |
| 195 return Float.intBitsToFloat(getInt(address, bigEndian)); | |
| 196 } | |
| 197 | |
| 198 public double getDouble(long address, boolean bigEndian) { | |
| 199 return Double.longBitsToDouble(getLong(address, bigEndian)); | |
| 200 } | |
| 201 } |