Mercurial > hg > graal-compiler
annotate agent/src/share/classes/sun/jvm/hotspot/utilities/HeapGXLWriter.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 | 63997f575155 |
| children | 6bd680e9ea35 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2004, 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 java.io.*; | |
| 28 import java.util.*; | |
| 29 import sun.jvm.hotspot.oops.*; | |
| 30 import sun.jvm.hotspot.runtime.*; | |
| 31 | |
| 32 /** | |
| 33 * <p>This class writes Java heap in Graph eXchange Language (GXL) | |
| 34 * format. GXL is an open standard for serializing arbitrary graphs in | |
| 35 * XML syntax.</p> | |
| 36 * | |
| 37 * <p>A GXL document contains one or more graphs. A graph contains | |
| 38 * nodes and edges. Both nodes and edges can have attributes. graphs, | |
| 39 * nodes, edges and attributes are represented by XML elements graph, | |
| 40 * node, edge and attr respectively. Attributes can be typed. GXL | |
| 41 * supports locator, bool, int, float, bool, string, enum as well as | |
| 42 * set, seq, bag, tup types. Nodes must have a XML attribute 'id' that | |
| 43 * is unique id of the node in the GXL document. Edges must have | |
| 44 * 'from' and 'to' XML attributes that are ids of from and to nodes.</p> | |
| 45 * | |
| 46 * <p>Java heap to GXL document mapping:</p> | |
| 47 * <ul> | |
| 48 * <li>Java object - GXL node. | |
| 49 * <li>Java primitive field - GXL attribute (type mapping below). | |
| 50 * <li>Java reference field - GXL edge from referee to referent node. | |
| 51 * <li>Java primitive array - GXL node with seq type attribute. | |
| 52 * <li>Java char array - GXL node with one attribute of string type. | |
| 53 * <li>Java object array - GXL node and 'length' edges. | |
| 54 * </ul> | |
| 55 * | |
| 56 * <p>Java primitive to GXL type mapping:</p> | |
| 57 * <ul> | |
| 58 * <li>Java byte, int, short, long - GXL int attribute | |
| 59 * <li>Java float, double - GXL float attribute | |
| 60 * <li>Java boolean - GXL bool atttribute | |
| 61 * <li>Java char - GXL string attribute | |
| 62 * </ul> | |
| 63 * | |
| 64 * Exact Java primitive type code is written in 'kind' attribute of | |
| 65 * 'attr' element. Type code is specified in JVM spec. second edition | |
| 66 * section 4.3.2 (Field Descriptor). | |
| 67 * | |
| 68 * @see <a href="http://www.gupro.de/GXL/">GXL</a> | |
| 69 * @see <a href="http://www.gupro.de/GXL/dtd/dtd.html">GXL DTD</a> | |
| 70 */ | |
| 71 | |
| 72 public class HeapGXLWriter extends AbstractHeapGraphWriter { | |
| 73 public void write(String fileName) throws IOException { | |
| 74 out = new PrintWriter(new BufferedWriter(new FileWriter(fileName))); | |
| 75 super.write(); | |
| 76 if (out.checkError()) { | |
| 77 throw new IOException(); | |
| 78 } | |
| 79 out.flush(); | |
| 80 } | |
| 81 | |
| 82 protected void writeHeapHeader() throws IOException { | |
| 83 // XML processing instruction | |
| 84 out.print("<?xml version='1.0' encoding='"); | |
| 85 out.print(ENCODING); | |
| 86 out.println("'?>"); | |
| 87 | |
| 88 out.println("<gxl>"); | |
| 89 out.println("<graph id='JavaHeap'>"); | |
| 90 | |
| 91 // document properties | |
| 92 writeAttribute("creation-date", "string", new Date().toString()); | |
| 93 | |
| 94 // write VM info | |
| 95 writeVMInfo(); | |
| 96 | |
| 97 // emit a node for null | |
| 98 out.print("<node id='"); | |
| 99 out.print(getID(null)); | |
| 100 out.println("'/>"); | |
| 101 } | |
| 102 | |
| 103 protected void writeObjectHeader(Oop oop) throws IOException { | |
| 104 refFields = new ArrayList(); | |
| 105 isArray = oop.isArray(); | |
| 106 | |
| 107 // generate an edge for instanceof relation | |
| 108 // between object node and it's class node. | |
| 109 writeEdge(oop, oop.getKlass().getJavaMirror(), "instanceof"); | |
| 110 | |
| 111 out.print("<node id='"); | |
| 112 out.print(getID(oop)); | |
| 113 out.println("'>"); | |
| 114 } | |
| 115 | |
| 116 protected void writeObjectFooter(Oop oop) throws IOException { | |
| 117 out.println("</node>"); | |
| 118 | |
| 119 // write the reference fields as edges | |
| 120 for (Iterator itr = refFields.iterator(); itr.hasNext();) { | |
| 121 OopField field = (OopField) itr.next(); | |
| 122 Oop ref = field.getValue(oop); | |
| 123 | |
| 124 String name = field.getID().getName(); | |
| 125 if (isArray) { | |
| 126 // for arrays elements we use element<index> pattern | |
| 127 name = "element" + name; | |
| 128 } else { | |
| 129 name = identifierToXMLName(name); | |
| 130 } | |
| 131 writeEdge(oop, ref, name); | |
| 132 } | |
| 133 refFields = null; | |
| 134 } | |
| 135 | |
| 136 protected void writeObjectArray(ObjArray array) throws IOException { | |
| 137 writeObjectHeader(array); | |
| 138 writeArrayLength(array); | |
| 139 writeObjectFields(array); | |
| 140 writeObjectFooter(array); | |
| 141 } | |
| 142 | |
| 143 protected void writePrimitiveArray(TypeArray array) | |
| 144 throws IOException { | |
| 145 writeObjectHeader(array); | |
| 146 // write array length | |
| 147 writeArrayLength(array); | |
| 148 // write array elements | |
| 149 out.println("\t<attr name='elements'>"); | |
| 150 TypeArrayKlass klass = (TypeArrayKlass) array.getKlass(); | |
| 151 if (klass.getElementType() == TypeArrayKlass.T_CHAR) { | |
| 152 // char[] special treatment -- write it as string | |
| 153 out.print("\t<string>"); | |
| 154 out.print(escapeXMLChars(OopUtilities.charArrayToString(array))); | |
| 155 out.println("</string>"); | |
| 156 } else { | |
| 157 out.println("\t<seq>"); | |
| 158 writeObjectFields(array); | |
| 159 out.println("\t</seq>"); | |
| 160 } | |
| 161 out.println("\t</attr>"); | |
| 162 writeObjectFooter(array); | |
| 163 } | |
| 164 | |
| 165 protected void writeClass(Instance instance) throws IOException { | |
| 166 writeObjectHeader(instance); | |
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167 Klass reflectedType = java_lang_Class.asKlass(instance); |
| 0 | 168 boolean isInstanceKlass = (reflectedType instanceof InstanceKlass); |
| 169 // reflectedType is null for primitive types (int.class etc). | |
| 170 if (reflectedType != null) { | |
| 171 Symbol name = reflectedType.getName(); | |
| 172 if (name != null) { | |
| 173 // write class name as an attribute | |
| 174 writeAttribute("class-name", "string", name.asString()); | |
| 175 } | |
| 176 if (isInstanceKlass) { | |
| 177 // write object-size as an attribute | |
| 178 long sizeInBytes = reflectedType.getLayoutHelper(); | |
| 179 writeAttribute("object-size", "int", | |
| 180 Long.toString(sizeInBytes)); | |
| 181 // write static fields of this class. | |
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182 writeObjectFields((InstanceKlass)reflectedType); |
| 0 | 183 } |
| 184 } | |
| 185 out.println("</node>"); | |
| 186 | |
| 187 // write edges for super class and direct interfaces | |
| 188 if (reflectedType != null) { | |
| 189 Klass superType = reflectedType.getSuper(); | |
| 190 Oop superMirror = (superType == null)? | |
| 191 null : superType.getJavaMirror(); | |
| 192 writeEdge(instance, superMirror, "extends"); | |
| 193 if (isInstanceKlass) { | |
| 194 // write edges for directly implemented interfaces | |
| 195 InstanceKlass ik = (InstanceKlass) reflectedType; | |
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196 KlassArray interfaces = ik.getLocalInterfaces(); |
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197 final int len = interfaces.length(); |
| 0 | 198 for (int i = 0; i < len; i++) { |
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199 Klass k = interfaces.getAt(i); |
| 0 | 200 writeEdge(instance, k.getJavaMirror(), "implements"); |
| 201 } | |
| 202 | |
| 203 // write loader | |
| 204 Oop loader = ik.getClassLoader(); | |
| 205 writeEdge(instance, loader, "loaded-by"); | |
| 206 | |
| 207 // write signers | |
| 208 Oop signers = ik.getSigners(); | |
| 209 writeEdge(instance, signers, "signed-by"); | |
| 210 | |
| 211 // write protection domain | |
| 212 Oop protectionDomain = ik.getProtectionDomain(); | |
| 213 writeEdge(instance, protectionDomain, "protection-domain"); | |
| 214 | |
| 215 // write edges for static reference fields from this class | |
| 216 for (Iterator itr = refFields.iterator(); itr.hasNext();) { | |
| 217 OopField field = (OopField) itr.next(); | |
| 218 Oop ref = field.getValue(reflectedType); | |
| 219 String name = field.getID().getName(); | |
| 220 writeEdge(instance, ref, identifierToXMLName(name)); | |
| 221 } | |
| 222 } | |
| 223 } | |
| 224 refFields = null; | |
| 225 } | |
| 226 | |
| 227 protected void writeReferenceField(Oop oop, OopField field) | |
| 228 throws IOException { | |
| 229 refFields.add(field); | |
| 230 } | |
| 231 | |
| 232 protected void writeByteField(Oop oop, ByteField field) | |
| 233 throws IOException { | |
| 234 writeField(field, "int", "B", Byte.toString(field.getValue(oop))); | |
| 235 } | |
| 236 | |
| 237 protected void writeCharField(Oop oop, CharField field) | |
| 238 throws IOException { | |
| 239 writeField(field, "string", "C", | |
| 240 escapeXMLChars(Character.toString(field.getValue(oop)))); | |
| 241 } | |
| 242 | |
| 243 protected void writeBooleanField(Oop oop, BooleanField field) | |
| 244 throws IOException { | |
| 245 writeField(field, "bool", "Z", Boolean.toString(field.getValue(oop))); | |
| 246 } | |
| 247 | |
| 248 protected void writeShortField(Oop oop, ShortField field) | |
| 249 throws IOException { | |
| 250 writeField(field, "int", "S", Short.toString(field.getValue(oop))); | |
| 251 } | |
| 252 | |
| 253 protected void writeIntField(Oop oop, IntField field) | |
| 254 throws IOException { | |
| 255 writeField(field, "int", "I", Integer.toString(field.getValue(oop))); | |
| 256 } | |
| 257 | |
| 258 protected void writeLongField(Oop oop, LongField field) | |
| 259 throws IOException { | |
| 260 writeField(field, "int", "J", Long.toString(field.getValue(oop))); | |
| 261 } | |
| 262 | |
| 263 protected void writeFloatField(Oop oop, FloatField field) | |
| 264 throws IOException { | |
| 265 writeField(field, "float", "F", Float.toString(field.getValue(oop))); | |
| 266 } | |
| 267 | |
| 268 protected void writeDoubleField(Oop oop, DoubleField field) | |
| 269 throws IOException { | |
| 270 writeField(field, "float", "D", Double.toString(field.getValue(oop))); | |
| 271 } | |
| 272 | |
| 273 protected void writeHeapFooter() throws IOException { | |
| 274 out.println("</graph>"); | |
| 275 out.println("</gxl>"); | |
| 276 } | |
| 277 | |
| 278 //-- Internals only below this point | |
| 279 | |
| 280 // Java identifier to XML NMTOKEN type string | |
| 281 private static String identifierToXMLName(String name) { | |
| 282 // for now, just replace '$' with '_' | |
| 283 return name.replace('$', '_'); | |
| 284 } | |
| 285 | |
| 286 // escapes XML meta-characters and illegal characters | |
| 287 private static String escapeXMLChars(String s) { | |
| 288 // FIXME: is there a better way or API? | |
| 289 StringBuffer result = null; | |
| 290 for(int i = 0, max = s.length(), delta = 0; i < max; i++) { | |
| 291 char c = s.charAt(i); | |
| 292 String replacement = null; | |
| 293 if (c == '&') { | |
| 294 replacement = "&"; | |
| 295 } else if (c == '<') { | |
| 296 replacement = "<"; | |
| 297 } else if (c == '>') { | |
| 298 replacement = ">"; | |
| 299 } else if (c == '"') { | |
| 300 replacement = """; | |
| 301 } else if (c == '\'') { | |
| 302 replacement = "'"; | |
| 303 } else if (c < '\u0020' || (c > '\ud7ff' && c < '\ue000') || | |
| 304 c == '\ufffe' || c == '\uffff') { | |
| 305 // These are illegal in XML -- put these in a CDATA section. | |
| 306 // Refer to section 2.2 Characters in XML specification at | |
| 307 // http://www.w3.org/TR/2004/REC-xml-20040204/ | |
| 308 replacement = "<![CDATA[&#x" + | |
| 309 Integer.toHexString((int)c) + ";]]>"; | |
| 310 } | |
| 311 | |
| 312 if (replacement != null) { | |
| 313 if (result == null) { | |
| 314 result = new StringBuffer(s); | |
| 315 } | |
| 316 result.replace(i + delta, i + delta + 1, replacement); | |
| 317 delta += (replacement.length() - 1); | |
| 318 } | |
| 319 } | |
| 320 if (result == null) { | |
| 321 return s; | |
| 322 } | |
| 323 return result.toString(); | |
| 324 } | |
| 325 | |
| 326 private static String getID(Oop oop) { | |
| 327 // address as unique id for node -- prefixed by "ID_". | |
| 328 if (oop == null) { | |
| 329 return "ID_NULL"; | |
| 330 } else { | |
| 331 return "ID_" + oop.getHandle().toString(); | |
| 332 } | |
| 333 } | |
| 334 | |
| 335 private void writeArrayLength(Array array) throws IOException { | |
| 336 writeAttribute("length", "int", | |
| 337 Integer.toString((int) array.getLength())); | |
| 338 } | |
| 339 | |
| 340 private void writeAttribute(String name, String type, String value) { | |
| 341 out.print("\t<attr name='"); | |
| 342 out.print(name); | |
| 343 out.print("'><"); | |
| 344 out.print(type); | |
| 345 out.print('>'); | |
| 346 out.print(value); | |
| 347 out.print("</"); | |
| 348 out.print(type); | |
| 349 out.println("></attr>"); | |
| 350 } | |
| 351 | |
| 352 private void writeEdge(Oop from, Oop to, String name) throws IOException { | |
| 353 out.print("<edge from='"); | |
| 354 out.print(getID(from)); | |
| 355 out.print("' to='"); | |
| 356 out.print(getID(to)); | |
| 357 out.println("'>"); | |
| 358 writeAttribute("name", "string", name); | |
| 359 out.println("</edge>"); | |
| 360 } | |
| 361 | |
| 362 private void writeField(Field field, String type, String kind, | |
| 363 String value) throws IOException { | |
| 364 // 'type' is GXL type of the attribute | |
| 365 // 'kind' is Java type code ("B", "C", "Z", "S", "I", "J", "F", "D") | |
| 366 if (isArray) { | |
| 367 out.print('\t'); | |
| 368 } else { | |
| 369 out.print("\t<attr name='"); | |
| 370 String name = field.getID().getName(); | |
| 371 out.print(identifierToXMLName(name)); | |
| 372 out.print("' kind='"); | |
| 373 out.print(kind); | |
| 374 out.print("'>"); | |
| 375 } | |
| 376 out.print('<'); | |
| 377 out.print(type); | |
| 378 out.print('>'); | |
| 379 out.print(value); | |
| 380 out.print("</"); | |
| 381 out.print(type); | |
| 382 out.print('>'); | |
| 383 if (isArray) { | |
| 384 out.println(); | |
| 385 } else { | |
| 386 out.println("</attr>"); | |
| 387 } | |
| 388 } | |
| 389 | |
| 390 private void writeVMInfo() throws IOException { | |
| 391 VM vm = VM.getVM(); | |
| 392 writeAttribute("vm-version", "string", vm.getVMRelease()); | |
| 393 writeAttribute("vm-type", "string", | |
| 394 (vm.isClientCompiler())? "client" : | |
| 395 ((vm.isServerCompiler())? "server" : "core")); | |
| 396 writeAttribute("os", "string", vm.getOS()); | |
| 397 writeAttribute("cpu", "string", vm.getCPU()); | |
| 398 writeAttribute("pointer-size", "string", | |
| 399 Integer.toString((int)vm.getOopSize() * 8)); | |
| 400 } | |
| 401 | |
| 402 // XML encoding that we'll use | |
| 403 private static final String ENCODING = "UTF-8"; | |
| 404 | |
| 405 // reference fields of currently visited object | |
| 406 private List/*<OopField>*/ refFields; | |
| 407 // are we writing an array now? | |
| 408 private boolean isArray; | |
| 409 private PrintWriter out; | |
| 410 } |