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annotate agent/src/share/classes/sun/jvm/hotspot/debugger/DebuggerBase.java @ 2245:638119ce7cfd
7009309: JSR 292: compiler/6991596/Test6991596.java crashes on fastdebug JDK7/b122
Reviewed-by: kvn, never
author | twisti |
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date | Tue, 01 Feb 2011 03:38:44 -0800 |
parents | c18cbe5936b8 |
children | 8e47bac5643a |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2001, 2009, 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.debugger; | |
26 | |
27 /** <P> DebuggerBase is a recommended base class for debugger | |
28 implementations. It can use a PageCache to cache data from the | |
29 target process. Note that this class would not be suitable if the | |
30 system were used to reflect upon itself; it would never be safe to | |
31 store the value in an OopHandle in anything but an OopHandle. | |
32 However, it provides a fair amount of code sharing to the current | |
33 dbx and win32 implementations. </P> | |
34 | |
35 <P> NOTE that much of the code sharing is achieved by having this | |
36 class implement many of the methods in the Win32Debugger and | |
37 DbxDebugger interfaces. </P> */ | |
38 | |
39 public abstract class DebuggerBase implements Debugger { | |
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40 |
0 | 41 // May be set lazily, but must be set before calling any of the read |
42 // routines below | |
43 protected MachineDescription machDesc; | |
44 protected DebuggerUtilities utils; | |
45 // Java primitive type sizes, set during bootstrapping. Do not call | |
46 // any of the Java read routines until these are set up. | |
47 protected long jbooleanSize; | |
48 protected long jbyteSize; | |
49 protected long jcharSize; | |
50 protected long jdoubleSize; | |
51 protected long jfloatSize; | |
52 protected long jintSize; | |
53 protected long jlongSize; | |
54 protected long jshortSize; | |
55 protected boolean javaPrimitiveTypesConfigured; | |
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56 // heap data. |
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57 protected long oopSize; |
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58 protected long heapOopSize; |
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59 protected long narrowOopBase; // heap base for compressed oops. |
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60 protected int narrowOopShift; // shift to decode compressed oops. |
0 | 61 // Should be initialized if desired by calling initCache() |
62 private PageCache cache; | |
63 | |
64 // State for faster accessors that don't allocate memory on each read | |
65 private boolean useFastAccessors; | |
66 private boolean bigEndian; | |
67 | |
68 // Page-fetching functionality for LRU cache | |
69 class Fetcher implements PageFetcher { | |
70 public Page fetchPage(long pageBaseAddress, long numBytes) { | |
71 // This assumes that if any byte is unmapped, that the entire | |
72 // page is. The common case, however, is that the page is | |
73 // mapped, so we always fetch the entire thing all at once to | |
74 // avoid two round-trip communications per page fetch, even | |
75 // though fetching of unmapped pages will be slow. | |
76 ReadResult res = readBytesFromProcess(pageBaseAddress, numBytes); | |
77 if (res.getData() == null) { | |
78 return new Page(pageBaseAddress, numBytes); | |
79 } | |
80 return new Page(pageBaseAddress, res.getData()); | |
81 } | |
82 } | |
83 | |
84 protected DebuggerBase() { | |
85 } | |
86 | |
87 /** From the JVMDebugger interface. This is the only public method | |
88 of this class. */ | |
89 public void configureJavaPrimitiveTypeSizes(long jbooleanSize, | |
90 long jbyteSize, | |
91 long jcharSize, | |
92 long jdoubleSize, | |
93 long jfloatSize, | |
94 long jintSize, | |
95 long jlongSize, | |
96 long jshortSize) { | |
97 this.jbooleanSize = jbooleanSize; | |
98 this.jbyteSize = jbyteSize; | |
99 this.jcharSize = jcharSize; | |
100 this.jdoubleSize = jdoubleSize; | |
101 this.jfloatSize = jfloatSize; | |
102 this.jintSize = jintSize; | |
103 this.jlongSize = jlongSize; | |
104 this.jshortSize = jshortSize; | |
105 | |
106 if (jbooleanSize < 1) { | |
107 throw new RuntimeException("jboolean size is too small"); | |
108 } | |
109 | |
110 if (jbyteSize < 1) { | |
111 throw new RuntimeException("jbyte size is too small"); | |
112 } | |
113 | |
114 if (jcharSize < 2) { | |
115 throw new RuntimeException("jchar size is too small"); | |
116 } | |
117 | |
118 if (jdoubleSize < 8) { | |
119 throw new RuntimeException("jdouble size is too small"); | |
120 } | |
121 | |
122 if (jfloatSize < 4) { | |
123 throw new RuntimeException("jfloat size is too small"); | |
124 } | |
125 | |
126 if (jintSize < 4) { | |
127 throw new RuntimeException("jint size is too small"); | |
128 } | |
129 | |
130 if (jlongSize < 8) { | |
131 throw new RuntimeException("jlong size is too small"); | |
132 } | |
133 | |
134 if (jshortSize < 2) { | |
135 throw new RuntimeException("jshort size is too small"); | |
136 } | |
137 | |
138 if (jintSize != jfloatSize) { | |
139 // If dataToJFloat were rewritten, this wouldn't be necessary | |
140 throw new RuntimeException("jint size and jfloat size must be equal"); | |
141 } | |
142 | |
143 if (jlongSize != jdoubleSize) { | |
144 // If dataToJDouble were rewritten, this wouldn't be necessary | |
145 throw new RuntimeException("jlong size and jdouble size must be equal"); | |
146 } | |
147 | |
148 useFastAccessors = | |
149 ((cache != null) && | |
150 (jbooleanSize == 1) && | |
151 (jbyteSize == 1) && | |
152 (jcharSize == 2) && | |
153 (jdoubleSize == 8) && | |
154 (jfloatSize == 4) && | |
155 (jintSize == 4) && | |
156 (jlongSize == 8) && | |
157 (jshortSize == 2)); | |
158 | |
159 javaPrimitiveTypesConfigured = true; | |
160 } | |
161 | |
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162 public void putHeapConst(long heapOopSize, long narrowOopBase, int narrowOopShift) { |
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163 this.heapOopSize = heapOopSize; |
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164 this.narrowOopBase = narrowOopBase; |
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165 this.narrowOopShift = narrowOopShift; |
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166 } |
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167 |
0 | 168 /** May be called by subclasses if desired to initialize the page |
169 cache but may not be overridden */ | |
170 protected final void initCache(long pageSize, long maxNumPages) { | |
171 cache = new PageCache(pageSize, maxNumPages, new Fetcher()); | |
172 if (machDesc != null) { | |
173 bigEndian = machDesc.isBigEndian(); | |
174 } | |
175 } | |
176 | |
177 /** May be called by subclasses if needed (if the machine | |
178 description is not available at the time of cache | |
179 initialization, as on Solaris) but may not be overridden */ | |
180 protected final void setBigEndian(boolean bigEndian) { | |
181 this.bigEndian = bigEndian; | |
182 } | |
183 | |
184 /** May be called by subclasses to clear out the cache but may not | |
185 be overridden. For convenience, this can be called even if the | |
186 cache has not been initialized. */ | |
187 protected final void clearCache() { | |
188 if (cache != null) { | |
189 cache.clear(); | |
190 } | |
191 } | |
192 | |
193 /** May be called by subclasses to disable the cache (for example, | |
194 when the target process has been resumed) but may not be | |
195 overridden. For convenience, this can be called even if the | |
196 cache has not been initialized. */ | |
197 protected final void disableCache() { | |
198 if (cache != null) { | |
199 cache.disable(); | |
200 } | |
201 } | |
202 | |
203 /** May be called by subclasses to re-enable the cache (for example, | |
204 when the target process has been suspended) but may not be | |
205 overridden. For convenience, this can be called even if the | |
206 cache has not been initialized. */ | |
207 protected final void enableCache() { | |
208 if (cache != null) { | |
209 cache.enable(); | |
210 } | |
211 } | |
212 | |
213 /** May be called by subclasses directly but may not be overridden */ | |
214 protected final byte[] readBytes(long address, long numBytes) | |
215 throws UnmappedAddressException, DebuggerException { | |
216 if (cache != null) { | |
217 return cache.getData(address, numBytes); | |
218 } else { | |
219 ReadResult res = readBytesFromProcess(address, numBytes); | |
220 if (res.getData() != null) { | |
221 return res.getData(); | |
222 } | |
223 throw new UnmappedAddressException(res.getFailureAddress()); | |
224 } | |
225 } | |
226 | |
227 /** May be called by subclasses directly but may not be overridden */ | |
228 protected final void writeBytes(long address, long numBytes, byte[] data) | |
229 throws UnmappedAddressException, DebuggerException { | |
230 if (cache != null) { | |
231 cache.clear(address, numBytes); | |
232 } | |
233 writeBytesToProcess(address, numBytes, data); | |
234 } | |
235 | |
236 public boolean readJBoolean(long address) | |
237 throws UnmappedAddressException, UnalignedAddressException { | |
238 checkJavaConfigured(); | |
239 utils.checkAlignment(address, jbooleanSize); | |
240 if (useFastAccessors) { | |
241 return (cache.getByte(address) != 0); | |
242 } else { | |
243 byte[] data = readBytes(address, jbooleanSize); | |
244 return utils.dataToJBoolean(data, jbooleanSize); | |
245 } | |
246 } | |
247 | |
248 public byte readJByte(long address) | |
249 throws UnmappedAddressException, UnalignedAddressException { | |
250 checkJavaConfigured(); | |
251 utils.checkAlignment(address, jbyteSize); | |
252 if (useFastAccessors) { | |
253 return cache.getByte(address); | |
254 } else { | |
255 byte[] data = readBytes(address, jbyteSize); | |
256 return utils.dataToJByte(data, jbyteSize); | |
257 } | |
258 } | |
259 | |
260 // NOTE: assumes value does not span pages (may be bad assumption on | |
261 // Solaris/x86; see unalignedAccessesOkay in DbxDebugger hierarchy) | |
262 public char readJChar(long address) | |
263 throws UnmappedAddressException, UnalignedAddressException { | |
264 checkJavaConfigured(); | |
265 utils.checkAlignment(address, jcharSize); | |
266 if (useFastAccessors) { | |
267 return cache.getChar(address, bigEndian); | |
268 } else { | |
269 byte[] data = readBytes(address, jcharSize); | |
270 return (char) utils.dataToJChar(data, jcharSize); | |
271 } | |
272 } | |
273 | |
274 // NOTE: assumes value does not span pages (may be bad assumption on | |
275 // Solaris/x86; see unalignedAccessesOkay in DbxDebugger hierarchy) | |
276 public double readJDouble(long address) | |
277 throws UnmappedAddressException, UnalignedAddressException { | |
278 checkJavaConfigured(); | |
279 utils.checkAlignment(address, jdoubleSize); | |
280 if (useFastAccessors) { | |
281 return cache.getDouble(address, bigEndian); | |
282 } else { | |
283 byte[] data = readBytes(address, jdoubleSize); | |
284 return utils.dataToJDouble(data, jdoubleSize); | |
285 } | |
286 } | |
287 | |
288 // NOTE: assumes value does not span pages (may be bad assumption on | |
289 // Solaris/x86; see unalignedAccessesOkay in DbxDebugger hierarchy) | |
290 public float readJFloat(long address) | |
291 throws UnmappedAddressException, UnalignedAddressException { | |
292 checkJavaConfigured(); | |
293 utils.checkAlignment(address, jfloatSize); | |
294 if (useFastAccessors) { | |
295 return cache.getFloat(address, bigEndian); | |
296 } else { | |
297 byte[] data = readBytes(address, jfloatSize); | |
298 return utils.dataToJFloat(data, jfloatSize); | |
299 } | |
300 } | |
301 | |
302 // NOTE: assumes value does not span pages (may be bad assumption on | |
303 // Solaris/x86; see unalignedAccessesOkay in DbxDebugger hierarchy) | |
304 public int readJInt(long address) | |
305 throws UnmappedAddressException, UnalignedAddressException { | |
306 checkJavaConfigured(); | |
307 utils.checkAlignment(address, jintSize); | |
308 if (useFastAccessors) { | |
309 return cache.getInt(address, bigEndian); | |
310 } else { | |
311 byte[] data = readBytes(address, jintSize); | |
312 return utils.dataToJInt(data, jintSize); | |
313 } | |
314 } | |
315 | |
316 // NOTE: assumes value does not span pages (may be bad assumption on | |
317 // Solaris/x86; see unalignedAccessesOkay in DbxDebugger hierarchy) | |
318 public long readJLong(long address) | |
319 throws UnmappedAddressException, UnalignedAddressException { | |
320 checkJavaConfigured(); | |
321 utils.checkAlignment(address, jlongSize); | |
322 if (useFastAccessors) { | |
323 return cache.getLong(address, bigEndian); | |
324 } else { | |
325 byte[] data = readBytes(address, jlongSize); | |
326 return utils.dataToJLong(data, jlongSize); | |
327 } | |
328 } | |
329 | |
330 // NOTE: assumes value does not span pages (may be bad assumption on | |
331 // Solaris/x86; see unalignedAccessesOkay in DbxDebugger hierarchy) | |
332 public short readJShort(long address) | |
333 throws UnmappedAddressException, UnalignedAddressException { | |
334 checkJavaConfigured(); | |
335 utils.checkAlignment(address, jshortSize); | |
336 if (useFastAccessors) { | |
337 return cache.getShort(address, bigEndian); | |
338 } else { | |
339 byte[] data = readBytes(address, jshortSize); | |
340 return utils.dataToJShort(data, jshortSize); | |
341 } | |
342 } | |
343 | |
344 // NOTE: assumes value does not span pages (may be bad assumption on | |
345 // Solaris/x86; see unalignedAccessesOkay in DbxDebugger hierarchy) | |
346 public long readCInteger(long address, long numBytes, boolean isUnsigned) | |
347 throws UnmappedAddressException, UnalignedAddressException { | |
348 checkConfigured(); | |
349 utils.checkAlignment(address, numBytes); | |
350 if (useFastAccessors) { | |
351 if (isUnsigned) { | |
352 switch((int) numBytes) { | |
353 case 1: return cache.getByte(address) & 0xFF; | |
354 case 2: return cache.getShort(address, bigEndian) & 0xFFFF; | |
355 case 4: return cache.getInt(address, bigEndian) & 0xFFFFFFFFL; | |
356 case 8: return cache.getLong(address, bigEndian); | |
357 default: { | |
358 byte[] data = readBytes(address, numBytes); | |
359 return utils.dataToCInteger(data, isUnsigned); | |
360 } | |
361 } | |
362 } else { | |
363 switch((int) numBytes) { | |
364 case 1: return cache.getByte(address); | |
365 case 2: return cache.getShort(address, bigEndian); | |
366 case 4: return cache.getInt(address, bigEndian); | |
367 case 8: return cache.getLong(address, bigEndian); | |
368 default: { | |
369 byte[] data = readBytes(address, numBytes); | |
370 return utils.dataToCInteger(data, isUnsigned); | |
371 } | |
372 } | |
373 } | |
374 } else { | |
375 byte[] data = readBytes(address, numBytes); | |
376 return utils.dataToCInteger(data, isUnsigned); | |
377 } | |
378 } | |
379 | |
380 public void writeJBoolean(long address, boolean value) | |
381 throws UnmappedAddressException, UnalignedAddressException { | |
382 checkJavaConfigured(); | |
383 utils.checkAlignment(address, jbooleanSize); | |
384 byte[] data = utils.jbooleanToData(value); | |
385 writeBytes(address, jbooleanSize, data); | |
386 } | |
387 | |
388 public void writeJByte(long address, byte value) | |
389 throws UnmappedAddressException, UnalignedAddressException { | |
390 checkJavaConfigured(); | |
391 utils.checkAlignment(address, jbyteSize); | |
392 byte[] data = utils.jbyteToData(value); | |
393 writeBytes(address, jbyteSize, data); | |
394 } | |
395 | |
396 public void writeJChar(long address, char value) | |
397 throws UnmappedAddressException, UnalignedAddressException { | |
398 checkJavaConfigured(); | |
399 utils.checkAlignment(address, jcharSize); | |
400 byte[] data = utils.jcharToData(value); | |
401 writeBytes(address, jcharSize, data); | |
402 } | |
403 | |
404 public void writeJDouble(long address, double value) | |
405 throws UnmappedAddressException, UnalignedAddressException { | |
406 checkJavaConfigured(); | |
407 utils.checkAlignment(address, jdoubleSize); | |
408 byte[] data = utils.jdoubleToData(value); | |
409 writeBytes(address, jdoubleSize, data); | |
410 } | |
411 | |
412 public void writeJFloat(long address, float value) | |
413 throws UnmappedAddressException, UnalignedAddressException { | |
414 checkJavaConfigured(); | |
415 utils.checkAlignment(address, jfloatSize); | |
416 byte[] data = utils.jfloatToData(value); | |
417 writeBytes(address, jfloatSize, data); | |
418 } | |
419 | |
420 public void writeJInt(long address, int value) | |
421 throws UnmappedAddressException, UnalignedAddressException { | |
422 checkJavaConfigured(); | |
423 utils.checkAlignment(address, jintSize); | |
424 byte[] data = utils.jintToData(value); | |
425 writeBytes(address, jintSize, data); | |
426 } | |
427 | |
428 public void writeJLong(long address, long value) | |
429 throws UnmappedAddressException, UnalignedAddressException { | |
430 checkJavaConfigured(); | |
431 utils.checkAlignment(address, jlongSize); | |
432 byte[] data = utils.jlongToData(value); | |
433 writeBytes(address, jlongSize, data); | |
434 } | |
435 | |
436 public void writeJShort(long address, short value) | |
437 throws UnmappedAddressException, UnalignedAddressException { | |
438 checkJavaConfigured(); | |
439 utils.checkAlignment(address, jshortSize); | |
440 byte[] data = utils.jshortToData(value); | |
441 writeBytes(address, jshortSize, data); | |
442 } | |
443 | |
444 public void writeCInteger(long address, long numBytes, long value) | |
445 throws UnmappedAddressException, UnalignedAddressException { | |
446 checkConfigured(); | |
447 utils.checkAlignment(address, numBytes); | |
448 byte[] data = utils.cIntegerToData(numBytes, value); | |
449 writeBytes(address, numBytes, data); | |
450 } | |
451 | |
452 protected long readAddressValue(long address) | |
453 throws UnmappedAddressException, UnalignedAddressException { | |
454 return readCInteger(address, machDesc.getAddressSize(), true); | |
455 } | |
456 | |
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457 protected long readCompOopAddressValue(long address) |
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458 throws UnmappedAddressException, UnalignedAddressException { |
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459 long value = readCInteger(address, getHeapOopSize(), true); |
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460 if (value != 0) { |
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461 // See oop.inline.hpp decode_heap_oop |
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462 value = (long)(narrowOopBase + (long)(value << narrowOopShift)); |
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463 } |
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464 return value; |
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465 } |
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466 |
0 | 467 protected void writeAddressValue(long address, long value) |
468 throws UnmappedAddressException, UnalignedAddressException { | |
469 writeCInteger(address, machDesc.getAddressSize(), value); | |
470 } | |
471 | |
472 /** Can be called by subclasses but can not be overridden */ | |
473 protected final void checkConfigured() { | |
474 if (machDesc == null) { | |
475 throw new RuntimeException("MachineDescription must have been set by this point"); | |
476 } | |
477 if (utils == null) { | |
478 throw new RuntimeException("DebuggerUtilities must have been set by this point"); | |
479 } | |
480 } | |
481 | |
482 /** Can be called by subclasses but can not be overridden */ | |
483 protected final void checkJavaConfigured() { | |
484 checkConfigured(); | |
485 | |
486 if (!javaPrimitiveTypesConfigured) { | |
487 throw new RuntimeException("Java primitive type sizes have not yet been configured"); | |
488 } | |
489 } | |
490 | |
491 /** Possibly override page cache size with user-specified property */ | |
492 protected int parseCacheNumPagesProperty(int defaultNum) { | |
493 String cacheNumPagesString = System.getProperty("cacheNumPages"); | |
494 if (cacheNumPagesString != null) { | |
495 try { | |
496 return Integer.parseInt(cacheNumPagesString); | |
497 } catch (Exception e) { | |
498 System.err.println("Error parsing cacheNumPages property:"); | |
499 e.printStackTrace(); | |
500 } | |
501 } | |
502 return defaultNum; | |
503 } | |
504 | |
505 /** Interim solution for allowing subclasses to write bytes to | |
506 process until we make that functionality available in the basic | |
507 Address interface */ | |
508 protected void invalidatePageCache(long startAddress, long numBytes) { | |
509 cache.clear(startAddress, numBytes); | |
510 } | |
511 | |
512 public long getJBooleanSize() { | |
513 return jbooleanSize; | |
514 } | |
515 | |
516 public long getJByteSize() { | |
517 return jbyteSize; | |
518 } | |
519 | |
520 public long getJCharSize() { | |
521 return jcharSize; | |
522 } | |
523 | |
524 public long getJDoubleSize() { | |
525 return jdoubleSize; | |
526 } | |
527 | |
528 public long getJFloatSize() { | |
529 return jfloatSize; | |
530 } | |
531 | |
532 public long getJIntSize() { | |
533 return jintSize; | |
534 } | |
535 | |
536 public long getJLongSize() { | |
537 return jlongSize; | |
538 } | |
539 | |
540 public long getJShortSize() { | |
541 return jshortSize; | |
542 } | |
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543 |
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544 public long getHeapOopSize() { |
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545 return heapOopSize; |
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546 } |
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547 |
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548 public long getNarrowOopBase() { |
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549 return narrowOopBase; |
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550 } |
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551 public int getNarrowOopShift() { |
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552 return narrowOopShift; |
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553 } |
0 | 554 } |