Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/tools/ClassLoaderStats.java @ 11054:38ea2efa32a7
8010278: SA: provide mechanism for using an alternative SA debugger back-end.
Reviewed-by: sla, dsamersoff
| author | kevinw |
|---|---|
| date | Wed, 26 Jun 2013 00:01:20 +0100 |
| parents | b685ca4f4fb9 |
| children | 7fe6ef09d242 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2003, 2013, 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.tools; | |
| 26 | |
| 27 import java.io.*; | |
| 28 import java.util.*; | |
| 29 | |
| 30 import sun.jvm.hotspot.debugger.*; | |
| 31 import sun.jvm.hotspot.memory.*; | |
| 32 import sun.jvm.hotspot.oops.*; | |
| 33 import sun.jvm.hotspot.runtime.*; | |
| 34 import sun.jvm.hotspot.tools.*; | |
| 35 import sun.jvm.hotspot.utilities.*; | |
| 36 | |
| 37 /** | |
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38 A command line tool to print class loader statistics. |
| 0 | 39 */ |
| 40 | |
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41 public class ClassLoaderStats extends Tool { |
| 0 | 42 boolean verbose = true; |
| 43 | |
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44 public ClassLoaderStats() { |
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45 super(); |
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46 } |
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47 |
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48 public ClassLoaderStats(JVMDebugger d) { |
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49 super(d); |
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50 } |
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51 |
| 0 | 52 public static void main(String[] args) { |
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53 ClassLoaderStats cls = new ClassLoaderStats(); |
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54 cls.start(args); |
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55 cls.stop(); |
| 0 | 56 } |
| 57 | |
| 58 private static class ClassData { | |
| 59 Klass klass; | |
| 60 long size; | |
| 61 | |
| 62 ClassData(Klass klass, long size) { | |
| 63 this.klass = klass; this.size = size; | |
| 64 } | |
| 65 } | |
| 66 | |
| 67 private static class LoaderData { | |
| 68 long numClasses; | |
| 69 long classSize; | |
| 70 List classDetail = new ArrayList(); // List<ClassData> | |
| 71 } | |
| 72 | |
| 73 public void run() { | |
| 74 printClassLoaderStatistics(); | |
| 75 } | |
| 76 | |
| 77 private void printClassLoaderStatistics() { | |
| 78 final PrintStream out = System.out; | |
| 79 final PrintStream err = System.err; | |
| 80 final Map loaderMap = new HashMap(); | |
| 81 // loader data for bootstrap class loader | |
| 82 final LoaderData bootstrapLoaderData = new LoaderData(); | |
| 83 if (verbose) { | |
| 84 err.print("finding class loader instances .."); | |
| 85 } | |
| 86 | |
| 87 VM vm = VM.getVM(); | |
| 88 ObjectHeap heap = vm.getObjectHeap(); | |
| 89 Klass classLoaderKlass = vm.getSystemDictionary().getClassLoaderKlass(); | |
| 90 try { | |
| 91 heap.iterateObjectsOfKlass(new DefaultHeapVisitor() { | |
| 92 public boolean doObj(Oop oop) { | |
| 93 loaderMap.put(oop, new LoaderData()); | |
| 94 return false; | |
| 95 } | |
| 96 }, classLoaderKlass); | |
| 97 } catch (Exception se) { | |
| 98 se.printStackTrace(); | |
| 99 } | |
| 100 | |
| 101 if (verbose) { | |
| 102 err.println("done."); | |
| 103 err.print("computing per loader stat .."); | |
| 104 } | |
| 105 | |
| 106 SystemDictionary dict = VM.getVM().getSystemDictionary(); | |
| 107 dict.classesDo(new SystemDictionary.ClassAndLoaderVisitor() { | |
| 108 public void visit(Klass k, Oop loader) { | |
| 109 if (! (k instanceof InstanceKlass)) { | |
| 110 return; | |
| 111 } | |
| 112 LoaderData ld = (loader != null) ? (LoaderData)loaderMap.get(loader) | |
| 113 : bootstrapLoaderData; | |
| 114 if (ld != null) { | |
| 115 ld.numClasses++; | |
| 116 long size = computeSize((InstanceKlass)k); | |
| 117 ld.classDetail.add(new ClassData(k, size)); | |
| 118 ld.classSize += size; | |
| 119 } | |
| 120 } | |
| 121 }); | |
| 122 | |
| 123 if (verbose) { | |
| 124 err.println("done."); | |
| 125 err.print("please wait.. computing liveness"); | |
| 126 } | |
| 127 | |
| 128 // compute reverse pointer analysis (takes long time for larger app) | |
| 129 ReversePtrsAnalysis analysis = new ReversePtrsAnalysis(); | |
| 130 | |
| 131 if (verbose) { | |
| 132 analysis.setHeapProgressThunk(new HeapProgressThunk() { | |
| 133 public void heapIterationFractionUpdate(double fractionOfHeapVisited) { | |
| 134 err.print('.'); | |
| 135 } | |
| 136 // This will be called after the iteration is complete | |
| 137 public void heapIterationComplete() { | |
| 138 err.println("done."); | |
| 139 } | |
| 140 }); | |
| 141 } | |
| 142 | |
| 143 try { | |
| 144 analysis.run(); | |
| 145 } catch (Exception e) { | |
| 146 // e.printStackTrace(); | |
| 147 if (verbose) | |
| 148 err.println("liveness analysis may be inaccurate ..."); | |
| 149 } | |
| 150 ReversePtrs liveness = VM.getVM().getRevPtrs(); | |
| 151 | |
| 152 out.println("class_loader\tclasses\tbytes\tparent_loader\talive?\ttype"); | |
| 153 out.println(); | |
| 154 | |
| 155 long numClassLoaders = 1L; | |
| 156 long totalNumClasses = bootstrapLoaderData.numClasses; | |
| 157 long totalClassSize = bootstrapLoaderData.classSize; | |
| 158 long numAliveLoaders = 1L; | |
| 159 long numDeadLoaders = 0L; | |
| 160 | |
| 161 // print bootstrap loader details | |
| 162 out.print("<bootstrap>"); | |
| 163 out.print('\t'); | |
| 164 out.print(bootstrapLoaderData.numClasses); | |
| 165 out.print('\t'); | |
| 166 out.print(bootstrapLoaderData.classSize); | |
| 167 out.print('\t'); | |
| 168 out.print(" null "); | |
| 169 out.print('\t'); | |
| 170 // bootstrap loader is always alive | |
| 171 out.print("live"); | |
| 172 out.print('\t'); | |
| 173 out.println("<internal>"); | |
| 174 | |
| 175 for (Iterator keyItr = loaderMap.keySet().iterator(); keyItr.hasNext();) { | |
| 176 Oop loader = (Oop) keyItr.next(); | |
| 177 LoaderData data = (LoaderData) loaderMap.get(loader); | |
| 178 numClassLoaders ++; | |
| 179 totalNumClasses += data.numClasses; | |
| 180 totalClassSize += data.classSize; | |
| 181 | |
| 182 out.print(loader.getHandle()); | |
| 183 out.print('\t'); | |
| 184 out.print(data.numClasses); | |
| 185 out.print('\t'); | |
| 186 out.print(data.classSize); | |
| 187 out.print('\t'); | |
| 188 | |
| 189 class ParentFinder extends DefaultOopVisitor { | |
| 190 public void doOop(OopField field, boolean isVMField) { | |
| 191 if (field.getID().getName().equals("parent")) { | |
| 192 parent = field.getValue(getObj()); | |
| 193 } | |
| 194 } | |
| 195 private Oop parent = null; | |
| 196 public Oop getParent() { return parent; } | |
| 197 } | |
| 198 | |
| 199 ParentFinder parentFinder = new ParentFinder(); | |
| 200 loader.iterate(parentFinder, false); | |
| 201 Oop parent = parentFinder.getParent(); | |
| 202 out.print((parent != null)? parent.getHandle().toString() : " null "); | |
| 203 out.print('\t'); | |
| 204 boolean alive = (liveness != null) ? (liveness.get(loader) != null) : true; | |
| 205 out.print(alive? "live" : "dead"); | |
| 206 if (alive) numAliveLoaders++; else numDeadLoaders++; | |
| 207 out.print('\t'); | |
| 208 Klass loaderKlass = loader.getKlass(); | |
| 209 if (loaderKlass != null) { | |
| 210 out.print(loaderKlass.getName().asString()); | |
| 211 out.print('@'); | |
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212 out.print(loader.getKlass().getAddress()); |
| 0 | 213 } else { |
| 214 out.print(" null! "); | |
| 215 } | |
| 216 out.println(); | |
| 217 } | |
| 218 | |
| 219 out.println(); | |
| 220 // summary line | |
| 221 out.print("total = "); | |
| 222 out.print(numClassLoaders); | |
| 223 out.print('\t'); | |
| 224 out.print(totalNumClasses); | |
| 225 out.print('\t'); | |
| 226 out.print(totalClassSize); | |
| 227 out.print('\t'); | |
| 228 out.print(" N/A "); | |
| 229 out.print('\t'); | |
| 230 out.print("alive="); | |
| 231 out.print(numAliveLoaders); | |
| 232 out.print(", dead="); | |
| 233 out.print(numDeadLoaders); | |
| 234 out.print('\t'); | |
| 235 out.print(" N/A "); | |
| 236 out.println(); | |
| 237 } | |
| 238 | |
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239 private static long objectSize(Oop oop) { |
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240 return oop == null ? 0L : oop.getObjectSize(); |
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241 } |
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242 |
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243 // Don't count the shared empty arrays |
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244 private static long arraySize(GenericArray arr) { |
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245 return arr.getLength() != 0L ? arr.getSize() : 0L; |
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246 } |
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247 |
| 0 | 248 private long computeSize(InstanceKlass k) { |
| 249 long size = 0L; | |
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250 // the InstanceKlass object itself |
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251 size += k.getSize(); |
| 0 | 252 |
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253 // Constant pool |
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254 ConstantPool cp = k.getConstants(); |
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255 size += cp.getSize(); |
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256 if (cp.getCache() != null) { |
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257 size += cp.getCache().getSize(); |
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258 } |
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259 size += arraySize(cp.getTags()); |
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260 |
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261 // Interfaces |
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262 size += arraySize(k.getLocalInterfaces()); |
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263 size += arraySize(k.getTransitiveInterfaces()); |
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264 |
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265 // Inner classes |
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266 size += arraySize(k.getInnerClasses()); |
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268 // Fields |
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269 size += arraySize(k.getFields()); |
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270 |
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271 // Methods |
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272 MethodArray methods = k.getMethods(); |
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273 int nmethods = (int) methods.getLength(); |
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274 if (nmethods != 0L) { |
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275 size += methods.getSize(); |
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276 for (int i = 0; i < nmethods; ++i) { |
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277 Method m = methods.at(i); |
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278 size += m.getSize(); |
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279 size += m.getConstMethod().getSize(); |
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280 } |
| 0 | 281 } |
| 282 | |
| 283 return size; | |
| 284 } | |
| 285 } |