Mercurial > hg > truffle
comparison agent/src/share/classes/sun/jvm/hotspot/utilities/AbstractHeapGraphWriter.java @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
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children | ba764ed4b6f2 |
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1 /* | |
2 * Copyright 2004-2005 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.utilities; | |
26 | |
27 import java.io.*; | |
28 import sun.jvm.hotspot.debugger.*; | |
29 import sun.jvm.hotspot.memory.*; | |
30 import sun.jvm.hotspot.oops.*; | |
31 import sun.jvm.hotspot.runtime.*; | |
32 | |
33 /** | |
34 * This is abstract base class for heap graph writers. This class does | |
35 * not assume any file format for the heap graph. It hides heap | |
36 * iteration, object (fields) iteration mechanism from derived | |
37 * classes. This class does not even accept OutputStream etc. so that | |
38 * derived class can construct specific writer/filter from input | |
39 * stream. | |
40 */ | |
41 | |
42 public abstract class AbstractHeapGraphWriter implements HeapGraphWriter { | |
43 // the function iterates heap and calls Oop type specific writers | |
44 protected void write() throws IOException { | |
45 SymbolTable symTbl = VM.getVM().getSymbolTable(); | |
46 javaLangClass = symTbl.probe("java/lang/Class"); | |
47 javaLangString = symTbl.probe("java/lang/String"); | |
48 javaLangThread = symTbl.probe("java/lang/Thread"); | |
49 ObjectHeap heap = VM.getVM().getObjectHeap(); | |
50 try { | |
51 heap.iterate(new DefaultHeapVisitor() { | |
52 public void prologue(long usedSize) { | |
53 try { | |
54 writeHeapHeader(); | |
55 } catch (IOException exp) { | |
56 throw new RuntimeException(exp); | |
57 } | |
58 } | |
59 | |
60 public boolean doObj(Oop oop) { | |
61 try { | |
62 if (oop instanceof TypeArray) { | |
63 writePrimitiveArray((TypeArray)oop); | |
64 } else if (oop instanceof ObjArray) { | |
65 Klass klass = oop.getKlass(); | |
66 ObjArrayKlass oak = (ObjArrayKlass) klass; | |
67 Klass bottomType = oak.getBottomKlass(); | |
68 if (bottomType instanceof InstanceKlass || | |
69 bottomType instanceof TypeArrayKlass) { | |
70 writeObjectArray((ObjArray)oop); | |
71 } else { | |
72 writeInternalObject(oop); | |
73 } | |
74 } else if (oop instanceof Instance) { | |
75 Instance instance = (Instance) oop; | |
76 Klass klass = instance.getKlass(); | |
77 Symbol name = klass.getName(); | |
78 if (name.equals(javaLangString)) { | |
79 writeString(instance); | |
80 } else if (name.equals(javaLangClass)) { | |
81 writeClass(instance); | |
82 } else if (name.equals(javaLangThread)) { | |
83 writeThread(instance); | |
84 } else { | |
85 klass = klass.getSuper(); | |
86 while (klass != null) { | |
87 name = klass.getName(); | |
88 if (name.equals(javaLangThread)) { | |
89 writeThread(instance); | |
90 return false; | |
91 } | |
92 klass = klass.getSuper(); | |
93 } | |
94 writeInstance(instance); | |
95 } | |
96 } else { | |
97 // not-a-Java-visible oop | |
98 writeInternalObject(oop); | |
99 } | |
100 } catch (IOException exp) { | |
101 throw new RuntimeException(exp); | |
102 } | |
103 return false; | |
104 } | |
105 | |
106 public void epilogue() { | |
107 try { | |
108 writeHeapFooter(); | |
109 } catch (IOException exp) { | |
110 throw new RuntimeException(exp); | |
111 } | |
112 } | |
113 }); | |
114 | |
115 // write JavaThreads | |
116 writeJavaThreads(); | |
117 | |
118 // write JNI global handles | |
119 writeGlobalJNIHandles(); | |
120 | |
121 } catch (RuntimeException re) { | |
122 handleRuntimeException(re); | |
123 } | |
124 } | |
125 | |
126 protected void writeJavaThreads() throws IOException { | |
127 Threads threads = VM.getVM().getThreads(); | |
128 JavaThread jt = threads.first(); | |
129 int index = 1; | |
130 while (jt != null) { | |
131 if (jt.getThreadObj() != null) { | |
132 // Note that the thread serial number range is 1-to-N | |
133 writeJavaThread(jt, index); | |
134 index++; | |
135 } | |
136 jt = jt.next(); | |
137 } | |
138 } | |
139 | |
140 protected void writeJavaThread(JavaThread jt, int index) | |
141 throws IOException { | |
142 } | |
143 | |
144 protected void writeGlobalJNIHandles() throws IOException { | |
145 JNIHandles handles = VM.getVM().getJNIHandles(); | |
146 JNIHandleBlock blk = handles.globalHandles(); | |
147 if (blk != null) { | |
148 try { | |
149 blk.oopsDo(new AddressVisitor() { | |
150 public void visitAddress(Address handleAddr) { | |
151 try { | |
152 if (handleAddr != null) { | |
153 writeGlobalJNIHandle(handleAddr); | |
154 } | |
155 } catch (IOException exp) { | |
156 throw new RuntimeException(exp); | |
157 } | |
158 } | |
159 }); | |
160 } catch (RuntimeException re) { | |
161 handleRuntimeException(re); | |
162 } | |
163 } | |
164 } | |
165 | |
166 protected void writeGlobalJNIHandle(Address handleAddr) throws IOException { | |
167 } | |
168 | |
169 protected void writeHeapHeader() throws IOException { | |
170 } | |
171 | |
172 // write non-Java-visible (hotspot internal) object | |
173 protected void writeInternalObject(Oop oop) throws IOException { | |
174 } | |
175 | |
176 // write Java primitive array | |
177 protected void writePrimitiveArray(TypeArray array) throws IOException { | |
178 writeObject(array); | |
179 } | |
180 | |
181 // write Java object array | |
182 protected void writeObjectArray(ObjArray array) throws IOException { | |
183 writeObject(array); | |
184 } | |
185 | |
186 protected void writeInstance(Instance instance) throws IOException { | |
187 writeObject(instance); | |
188 } | |
189 | |
190 protected void writeString(Instance instance) throws IOException { | |
191 writeInstance(instance); | |
192 } | |
193 | |
194 protected void writeClass(Instance instance) throws IOException { | |
195 writeInstance(instance); | |
196 } | |
197 | |
198 protected void writeThread(Instance instance) throws IOException { | |
199 writeInstance(instance); | |
200 } | |
201 | |
202 protected void writeObject(Oop oop) throws IOException { | |
203 writeObjectHeader(oop); | |
204 writeObjectFields(oop); | |
205 writeObjectFooter(oop); | |
206 } | |
207 | |
208 protected void writeObjectHeader(Oop oop) throws IOException { | |
209 } | |
210 | |
211 // write instance fields of given object | |
212 protected void writeObjectFields(final Oop oop) throws IOException { | |
213 try { | |
214 oop.iterate(new DefaultOopVisitor() { | |
215 public void doOop(OopField field, boolean isVMField) { | |
216 try { | |
217 Oop ref = field.getValue(oop); | |
218 if (ref instanceof TypeArray || | |
219 ref instanceof ObjArray || | |
220 ref instanceof Instance) { | |
221 writeReferenceField(oop, field); | |
222 } else { | |
223 writeInternalReferenceField(oop, field); | |
224 } | |
225 } catch (IOException exp) { | |
226 throw new RuntimeException(exp); | |
227 } | |
228 } | |
229 | |
230 public void doByte(ByteField field, boolean isVMField) { | |
231 try { | |
232 writeByteField(oop, field); | |
233 } catch (IOException exp) { | |
234 throw new RuntimeException(exp); | |
235 } | |
236 } | |
237 | |
238 public void doChar(CharField field, boolean isVMField) { | |
239 try { | |
240 writeCharField(oop, field); | |
241 } catch (IOException exp) { | |
242 throw new RuntimeException(exp); | |
243 } | |
244 } | |
245 | |
246 public void doBoolean(BooleanField field, boolean vField) { | |
247 try { | |
248 writeBooleanField(oop, field); | |
249 } catch (IOException exp) { | |
250 throw new RuntimeException(exp); | |
251 } | |
252 } | |
253 | |
254 public void doShort(ShortField field, boolean isVMField) { | |
255 try { | |
256 writeShortField(oop, field); | |
257 } catch (IOException exp) { | |
258 throw new RuntimeException(exp); | |
259 } | |
260 } | |
261 | |
262 public void doInt(IntField field, boolean isVMField) { | |
263 try { | |
264 writeIntField(oop, field); | |
265 } catch (IOException exp) { | |
266 throw new RuntimeException(exp); | |
267 } | |
268 } | |
269 | |
270 public void doLong(LongField field, boolean isVMField) { | |
271 try { | |
272 writeLongField(oop, field); | |
273 } catch (IOException exp) { | |
274 throw new RuntimeException(exp); | |
275 } | |
276 } | |
277 | |
278 public void doFloat(FloatField field, boolean isVMField) { | |
279 try { | |
280 writeFloatField(oop, field); | |
281 } catch (IOException exp) { | |
282 throw new RuntimeException(exp); | |
283 } | |
284 } | |
285 | |
286 public void doDouble(DoubleField field, boolean vField) { | |
287 try { | |
288 writeDoubleField(oop, field); | |
289 } catch (IOException exp) { | |
290 throw new RuntimeException(exp); | |
291 } | |
292 } | |
293 }, false); | |
294 } catch (RuntimeException re) { | |
295 handleRuntimeException(re); | |
296 } | |
297 } | |
298 | |
299 // object field writers | |
300 protected void writeInternalReferenceField(Oop oop, OopField field) | |
301 throws IOException { | |
302 } | |
303 | |
304 protected void writeReferenceField(Oop oop, OopField field) | |
305 throws IOException { | |
306 } | |
307 | |
308 protected void writeByteField(Oop oop, ByteField field) | |
309 throws IOException { | |
310 } | |
311 | |
312 protected void writeCharField(Oop oop, CharField field) | |
313 throws IOException { | |
314 } | |
315 | |
316 protected void writeBooleanField(Oop oop, BooleanField field) | |
317 throws IOException { | |
318 } | |
319 | |
320 protected void writeShortField(Oop oop, ShortField field) | |
321 throws IOException { | |
322 } | |
323 | |
324 protected void writeIntField(Oop oop, IntField field) | |
325 throws IOException { | |
326 } | |
327 | |
328 protected void writeLongField(Oop oop, LongField field) | |
329 throws IOException { | |
330 } | |
331 | |
332 protected void writeFloatField(Oop oop, FloatField field) | |
333 throws IOException { | |
334 } | |
335 | |
336 protected void writeDoubleField(Oop oop, DoubleField field) | |
337 throws IOException { | |
338 } | |
339 | |
340 protected void writeObjectFooter(Oop oop) throws IOException { | |
341 } | |
342 | |
343 protected void writeHeapFooter() throws IOException { | |
344 } | |
345 | |
346 // HeapVisitor, OopVisitor methods can't throw any non-runtime | |
347 // exception. But, derived class write methods (which are called | |
348 // from visitor callbacks) may throw IOException. Hence, we throw | |
349 // RuntimeException with origianal IOException as cause from the | |
350 // visitor methods. This method gets back the original IOException | |
351 // (if any) and re-throws the same. | |
352 protected void handleRuntimeException(RuntimeException re) | |
353 throws IOException { | |
354 Throwable cause = re.getCause(); | |
355 if (cause != null && cause instanceof IOException) { | |
356 throw (IOException) cause; | |
357 } else { | |
358 // some other RuntimeException, just re-throw | |
359 throw re; | |
360 } | |
361 } | |
362 | |
363 // whether a given oop is Java visible or hotspot internal? | |
364 protected boolean isJavaVisible(Oop oop) { | |
365 if (oop instanceof Instance || oop instanceof TypeArray) { | |
366 return true; | |
367 } else if (oop instanceof ObjArray) { | |
368 ObjArrayKlass oak = (ObjArrayKlass) oop.getKlass(); | |
369 Klass bottomKlass = oak.getBottomKlass(); | |
370 return bottomKlass instanceof InstanceKlass || | |
371 bottomKlass instanceof TypeArrayKlass; | |
372 } else { | |
373 return false; | |
374 } | |
375 } | |
376 | |
377 protected Symbol javaLangClass; | |
378 protected Symbol javaLangString; | |
379 protected Symbol javaLangThread; | |
380 } |