Mercurial > hg > graal-compiler
annotate agent/src/share/classes/sun/jvm/hotspot/utilities/PointerFinder.java @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
| author | coleenp |
|---|---|
| date | Sat, 01 Sep 2012 13:25:18 -0400 |
| parents | 3e8fbc61cee8 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
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6964458: Reimplement class meta-data storage to use native memory
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2 * Copyright (c) 2000, 2012, 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.utilities; | |
| 26 | |
| 27 import sun.jvm.hotspot.code.*; | |
| 28 import sun.jvm.hotspot.debugger.*; | |
| 29 import sun.jvm.hotspot.gc_interface.*; | |
| 30 import sun.jvm.hotspot.interpreter.*; | |
| 31 import sun.jvm.hotspot.runtime.*; | |
| 32 import sun.jvm.hotspot.memory.*; | |
| 33 | |
| 34 /** This class, only intended for use in the debugging system, | |
| 35 provides the functionality of find() in the VM. */ | |
| 36 | |
| 37 public class PointerFinder { | |
| 38 public static PointerLocation find(Address a) { | |
| 39 PointerLocation loc = new PointerLocation(a); | |
| 40 | |
| 41 CollectedHeap heap = VM.getVM().getUniverse().heap(); | |
| 42 if (heap instanceof GenCollectedHeap) { | |
| 43 GenCollectedHeap genheap = (GenCollectedHeap) heap; | |
| 44 if (genheap.isIn(a)) { | |
| 45 for (int i = 0; i < genheap.nGens(); i++) { | |
| 46 Generation g = genheap.getGen(i); | |
| 47 if (g.isIn(a)) { | |
| 48 loc.gen = g; | |
| 49 break; | |
| 50 } | |
| 51 } | |
| 52 | |
| 53 if (Assert.ASSERTS_ENABLED) { | |
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54 Assert.that(loc.gen != null, "Should have found this in a generation"); |
| 0 | 55 } |
| 56 | |
| 57 if (VM.getVM().getUseTLAB()) { | |
| 58 // Try to find thread containing it | |
| 59 for (JavaThread t = VM.getVM().getThreads().first(); t != null; t = t.next()) { | |
| 60 ThreadLocalAllocBuffer tlab = t.tlab(); | |
| 61 if (tlab.contains(a)) { | |
| 62 loc.inTLAB = true; | |
| 63 loc.tlabThread = t; | |
| 64 loc.tlab = tlab; | |
| 65 break; | |
| 66 } | |
| 67 } | |
| 68 } | |
| 69 | |
| 70 return loc; | |
| 71 } | |
| 72 } else { | |
| 73 if (heap.isIn(a)) { | |
| 74 loc.heap = heap; | |
| 75 return loc; | |
| 76 } | |
| 77 } | |
| 78 | |
| 79 Interpreter interp = VM.getVM().getInterpreter(); | |
| 80 if (interp.contains(a)) { | |
| 81 loc.inInterpreter = true; | |
| 82 loc.interpreterCodelet = interp.getCodeletContaining(a); | |
| 83 return loc; | |
| 84 } | |
| 85 | |
| 86 if (!VM.getVM().isCore()) { | |
| 87 CodeCache c = VM.getVM().getCodeCache(); | |
| 88 if (c.contains(a)) { | |
| 89 loc.inCodeCache = true; | |
| 90 loc.blob = c.findBlobUnsafe(a); | |
| 91 if (Assert.ASSERTS_ENABLED) { | |
| 92 Assert.that(loc.blob != null, "Should have found CodeBlob"); | |
| 93 } | |
| 1748 | 94 loc.inBlobCode = loc.blob.codeContains(a); |
| 95 loc.inBlobData = loc.blob.dataContains(a); | |
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96 |
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97 if (loc.blob.isNMethod()) { |
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98 NMethod nm = (NMethod) loc.blob; |
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99 loc.inBlobOops = nm.oopsContains(a); |
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100 } |
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101 |
| 1748 | 102 loc.inBlobUnknownLocation = (!(loc.inBlobCode || |
| 0 | 103 loc.inBlobData || |
| 104 loc.inBlobOops)); | |
| 105 return loc; | |
| 106 } | |
| 107 } | |
| 108 | |
| 109 // Check JNIHandles; both local and global | |
| 110 JNIHandles handles = VM.getVM().getJNIHandles(); | |
| 111 JNIHandleBlock handleBlock = handles.globalHandles(); | |
| 112 if (handleBlock != null) { | |
| 113 handleBlock = handleBlock.blockContainingHandle(a); | |
| 114 } | |
| 115 if (handleBlock != null) { | |
| 116 loc.inStrongGlobalJNIHandleBlock = true; | |
| 117 loc.handleBlock = handleBlock; | |
| 118 return loc; | |
| 119 } else { | |
| 120 handleBlock = handles.weakGlobalHandles(); | |
| 121 if (handleBlock != null) { | |
| 122 handleBlock = handleBlock.blockContainingHandle(a); | |
| 123 if (handleBlock != null) { | |
| 124 loc.inWeakGlobalJNIHandleBlock = true; | |
| 125 loc.handleBlock = handleBlock; | |
| 126 return loc; | |
| 127 } else { | |
| 128 // Look in thread-local handles | |
| 129 for (JavaThread t = VM.getVM().getThreads().first(); t != null; t = t.next()) { | |
| 130 handleBlock = t.activeHandles(); | |
| 131 if (handleBlock != null) { | |
| 132 handleBlock = handleBlock.blockContainingHandle(a); | |
| 133 if (handleBlock != null) { | |
| 134 loc.inLocalJNIHandleBlock = true; | |
| 135 loc.handleBlock = handleBlock; | |
| 136 loc.handleThread = t; | |
| 137 return loc; | |
| 138 } | |
| 139 } | |
| 140 } | |
| 141 } | |
| 142 } | |
| 143 } | |
| 144 | |
| 145 | |
| 146 // Fall through; have to return it anyway. | |
| 147 return loc; | |
| 148 } | |
| 149 } |