Mercurial > hg > graal-compiler
annotate agent/src/share/classes/sun/jvm/hotspot/code/CodeCache.java @ 3908:7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
Reviewed-by: kvn
| author | never |
|---|---|
| date | Mon, 05 Sep 2011 17:09:05 -0700 |
| parents | a80577f854f9 |
| children | 1d7922586cf6 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2000, 2011, 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.code; | |
| 26 | |
| 27 import java.util.*; | |
| 28 import sun.jvm.hotspot.debugger.*; | |
| 29 import sun.jvm.hotspot.memory.*; | |
| 30 import sun.jvm.hotspot.runtime.*; | |
| 31 import sun.jvm.hotspot.types.*; | |
| 32 import sun.jvm.hotspot.utilities.*; | |
| 33 | |
| 34 public class CodeCache { | |
| 35 private static AddressField heapField; | |
| 989 | 36 private static AddressField scavengeRootNMethodsField; |
| 0 | 37 private static VirtualConstructor virtualConstructor; |
| 38 | |
| 39 private CodeHeap heap; | |
| 40 | |
| 41 static { | |
| 42 VM.registerVMInitializedObserver(new Observer() { | |
| 43 public void update(Observable o, Object data) { | |
| 44 initialize(VM.getVM().getTypeDataBase()); | |
| 45 } | |
| 46 }); | |
| 47 } | |
| 48 | |
| 49 private static synchronized void initialize(TypeDataBase db) { | |
| 50 Type type = db.lookupType("CodeCache"); | |
| 51 | |
| 52 heapField = type.getAddressField("_heap"); | |
| 989 | 53 scavengeRootNMethodsField = type.getAddressField("_scavenge_root_nmethods"); |
| 0 | 54 |
| 55 virtualConstructor = new VirtualConstructor(db); | |
| 56 // Add mappings for all possible CodeBlob subclasses | |
| 57 virtualConstructor.addMapping("BufferBlob", BufferBlob.class); | |
| 58 virtualConstructor.addMapping("nmethod", NMethod.class); | |
| 59 virtualConstructor.addMapping("RuntimeStub", RuntimeStub.class); | |
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60 virtualConstructor.addMapping("RicochetBlob", RicochetBlob.class); |
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61 virtualConstructor.addMapping("AdapterBlob", AdapterBlob.class); |
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62 virtualConstructor.addMapping("MethodHandlesAdapterBlob", MethodHandlesAdapterBlob.class); |
| 0 | 63 virtualConstructor.addMapping("SafepointBlob", SafepointBlob.class); |
| 64 virtualConstructor.addMapping("DeoptimizationBlob", DeoptimizationBlob.class); | |
| 65 if (VM.getVM().isServerCompiler()) { | |
| 66 virtualConstructor.addMapping("ExceptionBlob", ExceptionBlob.class); | |
| 67 virtualConstructor.addMapping("UncommonTrapBlob", UncommonTrapBlob.class); | |
| 68 } | |
| 69 } | |
| 70 | |
| 71 public CodeCache() { | |
| 72 heap = (CodeHeap) VMObjectFactory.newObject(CodeHeap.class, heapField.getValue()); | |
| 73 } | |
| 74 | |
| 989 | 75 public NMethod scavengeRootMethods() { |
| 76 return (NMethod) VMObjectFactory.newObject(NMethod.class, scavengeRootNMethodsField.getValue()); | |
| 77 } | |
| 78 | |
| 0 | 79 public boolean contains(Address p) { |
| 80 return getHeap().contains(p); | |
| 81 } | |
| 82 | |
| 83 /** When VM.getVM().isDebugging() returns true, this behaves like | |
| 84 findBlobUnsafe */ | |
| 85 public CodeBlob findBlob(Address start) { | |
| 86 CodeBlob result = findBlobUnsafe(start); | |
| 87 if (result == null) return null; | |
| 88 if (VM.getVM().isDebugging()) { | |
| 89 return result; | |
| 90 } | |
| 91 // We could potientially look up non_entrant methods | |
| 92 // NOTE: this is effectively a "guarantee", and is slightly different from the one in the VM | |
| 93 if (Assert.ASSERTS_ENABLED) { | |
| 94 Assert.that(!(result.isZombie() || result.isLockedByVM()), "unsafe access to zombie method"); | |
| 95 } | |
| 96 return result; | |
| 97 } | |
| 98 | |
| 99 public CodeBlob findBlobUnsafe(Address start) { | |
| 100 CodeBlob result = null; | |
| 101 | |
| 102 try { | |
| 103 result = (CodeBlob) virtualConstructor.instantiateWrapperFor(getHeap().findStart(start)); | |
| 104 } | |
| 105 catch (WrongTypeException wte) { | |
| 106 Address cbAddr = null; | |
| 107 try { | |
| 108 cbAddr = getHeap().findStart(start); | |
| 109 } | |
| 110 catch (Exception findEx) { | |
| 111 findEx.printStackTrace(); | |
| 112 } | |
| 113 | |
| 114 String message = "Couldn't deduce type of CodeBlob "; | |
| 115 if (cbAddr != null) { | |
| 116 message = message + "@" + cbAddr + " "; | |
| 117 } | |
| 118 message = message + "for PC=" + start; | |
| 119 | |
| 120 throw new RuntimeException(message, wte); | |
| 121 } | |
| 122 if (result == null) return null; | |
| 123 if (Assert.ASSERTS_ENABLED) { | |
| 124 // The HeapBlock that contains this blob is outside of the blob | |
| 125 // but it shouldn't be an error to find a blob based on the | |
| 126 // pointer to the HeapBlock. | |
| 127 Assert.that(result.blobContains(start) || result.blobContains(start.addOffsetTo(8)), | |
| 128 "found wrong CodeBlob"); | |
| 129 } | |
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130 if (result.isRicochetBlob()) { |
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131 // This should probably be done for other SingletonBlobs |
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132 return VM.getVM().ricochetBlob(); |
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133 } |
| 0 | 134 return result; |
| 135 } | |
| 136 | |
| 137 public NMethod findNMethod(Address start) { | |
| 138 CodeBlob cb = findBlob(start); | |
| 139 if (Assert.ASSERTS_ENABLED) { | |
| 140 Assert.that(cb == null || cb.isNMethod(), "did not find an nmethod"); | |
| 141 } | |
| 142 return (NMethod) cb; | |
| 143 } | |
| 144 | |
| 145 public NMethod findNMethodUnsafe(Address start) { | |
| 146 CodeBlob cb = findBlobUnsafe(start); | |
| 147 if (Assert.ASSERTS_ENABLED) { | |
| 148 Assert.that(cb == null || cb.isNMethod(), "did not find an nmethod"); | |
| 149 } | |
| 150 return (NMethod) cb; | |
| 151 } | |
| 152 | |
| 153 /** Routine for instantiating appropriately-typed wrapper for a | |
| 154 CodeBlob. Used by CodeCache, Runtime1, etc. */ | |
| 155 public CodeBlob createCodeBlobWrapper(Address codeBlobAddr) { | |
| 156 try { | |
| 157 return (CodeBlob) virtualConstructor.instantiateWrapperFor(codeBlobAddr); | |
| 158 } | |
| 159 catch (Exception e) { | |
| 160 String message = "Unable to deduce type of CodeBlob from address " + codeBlobAddr + | |
| 161 " (expected type nmethod, RuntimeStub, "; | |
| 162 if (VM.getVM().isClientCompiler()) { | |
| 163 message = message + " or "; | |
| 164 } | |
| 165 message = message + "SafepointBlob"; | |
| 166 if (VM.getVM().isServerCompiler()) { | |
| 167 message = message + ", DeoptimizationBlob, or ExceptionBlob"; | |
| 168 } | |
| 169 message = message + ")"; | |
| 170 throw new RuntimeException(message); | |
| 171 } | |
| 172 } | |
| 173 | |
| 174 public void iterate(CodeCacheVisitor visitor) { | |
| 175 CodeHeap heap = getHeap(); | |
| 176 Address ptr = heap.begin(); | |
| 177 Address end = heap.end(); | |
| 178 | |
| 179 visitor.prologue(ptr, end); | |
| 180 CodeBlob lastBlob = null; | |
| 181 while (ptr != null && ptr.lessThan(end)) { | |
| 182 try { | |
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183 // Use findStart to get a pointer inside blob other findBlob asserts |
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184 CodeBlob blob = findBlobUnsafe(heap.findStart(ptr)); |
| 0 | 185 if (blob != null) { |
| 186 visitor.visit(blob); | |
| 187 if (blob == lastBlob) { | |
| 188 throw new InternalError("saw same blob twice"); | |
| 189 } | |
| 190 lastBlob = blob; | |
| 191 } | |
| 192 } catch (RuntimeException e) { | |
| 193 e.printStackTrace(); | |
| 194 } | |
| 195 Address next = heap.nextBlock(ptr); | |
| 196 if (next != null && next.lessThan(ptr)) { | |
| 197 throw new InternalError("pointer moved backwards"); | |
| 198 } | |
| 199 ptr = next; | |
| 200 } | |
| 201 visitor.epilogue(); | |
| 202 } | |
| 203 | |
| 204 //-------------------------------------------------------------------------------- | |
| 205 // Internals only below this point | |
| 206 // | |
| 207 | |
| 208 private CodeHeap getHeap() { | |
| 209 return heap; | |
| 210 } | |
| 211 } |