Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/code/CodeCache.java @ 1040:873ec3787992
6892186: SA does not dump debug info for scalar replaced objects
Summary: Implement scalar replaced objects debug info dump in SA.
Reviewed-by: twisti
| author | kvn |
|---|---|
| date | Wed, 21 Oct 2009 09:15:33 -0700 |
| parents | 148e5441d916 |
| children | c18cbe5936b8 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * Copyright 2000-2005 Sun Microsystems, Inc. All Rights Reserved. | |
| 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 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 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); | |
| 60 virtualConstructor.addMapping("SafepointBlob", SafepointBlob.class); | |
| 61 virtualConstructor.addMapping("DeoptimizationBlob", DeoptimizationBlob.class); | |
| 62 if (VM.getVM().isServerCompiler()) { | |
| 63 virtualConstructor.addMapping("ExceptionBlob", ExceptionBlob.class); | |
| 64 virtualConstructor.addMapping("UncommonTrapBlob", UncommonTrapBlob.class); | |
| 65 } | |
| 66 } | |
| 67 | |
| 68 public CodeCache() { | |
| 69 heap = (CodeHeap) VMObjectFactory.newObject(CodeHeap.class, heapField.getValue()); | |
| 70 } | |
| 71 | |
| 989 | 72 public NMethod scavengeRootMethods() { |
| 73 return (NMethod) VMObjectFactory.newObject(NMethod.class, scavengeRootNMethodsField.getValue()); | |
| 74 } | |
| 75 | |
| 0 | 76 public boolean contains(Address p) { |
| 77 return getHeap().contains(p); | |
| 78 } | |
| 79 | |
| 80 /** When VM.getVM().isDebugging() returns true, this behaves like | |
| 81 findBlobUnsafe */ | |
| 82 public CodeBlob findBlob(Address start) { | |
| 83 CodeBlob result = findBlobUnsafe(start); | |
| 84 if (result == null) return null; | |
| 85 if (VM.getVM().isDebugging()) { | |
| 86 return result; | |
| 87 } | |
| 88 // We could potientially look up non_entrant methods | |
| 89 // NOTE: this is effectively a "guarantee", and is slightly different from the one in the VM | |
| 90 if (Assert.ASSERTS_ENABLED) { | |
| 91 Assert.that(!(result.isZombie() || result.isLockedByVM()), "unsafe access to zombie method"); | |
| 92 } | |
| 93 return result; | |
| 94 } | |
| 95 | |
| 96 public CodeBlob findBlobUnsafe(Address start) { | |
| 97 CodeBlob result = null; | |
| 98 | |
| 99 try { | |
| 100 result = (CodeBlob) virtualConstructor.instantiateWrapperFor(getHeap().findStart(start)); | |
| 101 } | |
| 102 catch (WrongTypeException wte) { | |
| 103 Address cbAddr = null; | |
| 104 try { | |
| 105 cbAddr = getHeap().findStart(start); | |
| 106 } | |
| 107 catch (Exception findEx) { | |
| 108 findEx.printStackTrace(); | |
| 109 } | |
| 110 | |
| 111 String message = "Couldn't deduce type of CodeBlob "; | |
| 112 if (cbAddr != null) { | |
| 113 message = message + "@" + cbAddr + " "; | |
| 114 } | |
| 115 message = message + "for PC=" + start; | |
| 116 | |
| 117 throw new RuntimeException(message, wte); | |
| 118 } | |
| 119 if (result == null) return null; | |
| 120 if (Assert.ASSERTS_ENABLED) { | |
| 121 // The HeapBlock that contains this blob is outside of the blob | |
| 122 // but it shouldn't be an error to find a blob based on the | |
| 123 // pointer to the HeapBlock. | |
| 124 Assert.that(result.blobContains(start) || result.blobContains(start.addOffsetTo(8)), | |
| 125 "found wrong CodeBlob"); | |
| 126 } | |
| 127 return result; | |
| 128 } | |
| 129 | |
| 130 public NMethod findNMethod(Address start) { | |
| 131 CodeBlob cb = findBlob(start); | |
| 132 if (Assert.ASSERTS_ENABLED) { | |
| 133 Assert.that(cb == null || cb.isNMethod(), "did not find an nmethod"); | |
| 134 } | |
| 135 return (NMethod) cb; | |
| 136 } | |
| 137 | |
| 138 public NMethod findNMethodUnsafe(Address start) { | |
| 139 CodeBlob cb = findBlobUnsafe(start); | |
| 140 if (Assert.ASSERTS_ENABLED) { | |
| 141 Assert.that(cb == null || cb.isNMethod(), "did not find an nmethod"); | |
| 142 } | |
| 143 return (NMethod) cb; | |
| 144 } | |
| 145 | |
| 146 /** Routine for instantiating appropriately-typed wrapper for a | |
| 147 CodeBlob. Used by CodeCache, Runtime1, etc. */ | |
| 148 public CodeBlob createCodeBlobWrapper(Address codeBlobAddr) { | |
| 149 try { | |
| 150 return (CodeBlob) virtualConstructor.instantiateWrapperFor(codeBlobAddr); | |
| 151 } | |
| 152 catch (Exception e) { | |
| 153 String message = "Unable to deduce type of CodeBlob from address " + codeBlobAddr + | |
| 154 " (expected type nmethod, RuntimeStub, "; | |
| 155 if (VM.getVM().isClientCompiler()) { | |
| 156 message = message + " or "; | |
| 157 } | |
| 158 message = message + "SafepointBlob"; | |
| 159 if (VM.getVM().isServerCompiler()) { | |
| 160 message = message + ", DeoptimizationBlob, or ExceptionBlob"; | |
| 161 } | |
| 162 message = message + ")"; | |
| 163 throw new RuntimeException(message); | |
| 164 } | |
| 165 } | |
| 166 | |
| 167 public void iterate(CodeCacheVisitor visitor) { | |
| 168 CodeHeap heap = getHeap(); | |
| 169 Address ptr = heap.begin(); | |
| 170 Address end = heap.end(); | |
| 171 | |
| 172 visitor.prologue(ptr, end); | |
| 173 CodeBlob lastBlob = null; | |
| 174 while (ptr != null && ptr.lessThan(end)) { | |
| 175 try { | |
|
1040
873ec3787992
6892186: SA does not dump debug info for scalar replaced objects
kvn
parents:
989
diff
changeset
|
176 // Use findStart to get a pointer inside blob other findBlob asserts |
|
873ec3787992
6892186: SA does not dump debug info for scalar replaced objects
kvn
parents:
989
diff
changeset
|
177 CodeBlob blob = findBlobUnsafe(heap.findStart(ptr)); |
| 0 | 178 if (blob != null) { |
| 179 visitor.visit(blob); | |
| 180 if (blob == lastBlob) { | |
| 181 throw new InternalError("saw same blob twice"); | |
| 182 } | |
| 183 lastBlob = blob; | |
| 184 } | |
| 185 } catch (RuntimeException e) { | |
| 186 e.printStackTrace(); | |
| 187 } | |
| 188 Address next = heap.nextBlock(ptr); | |
| 189 if (next != null && next.lessThan(ptr)) { | |
| 190 throw new InternalError("pointer moved backwards"); | |
| 191 } | |
| 192 ptr = next; | |
| 193 } | |
| 194 visitor.epilogue(); | |
| 195 } | |
| 196 | |
| 197 //-------------------------------------------------------------------------------- | |
| 198 // Internals only below this point | |
| 199 // | |
| 200 | |
| 201 private CodeHeap getHeap() { | |
| 202 return heap; | |
| 203 } | |
| 204 } |