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annotate agent/src/share/classes/sun/jvm/hotspot/oops/ConstMethod.java @ 3945:8ed53447f690
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author | iveresov |
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date | Thu, 15 Sep 2011 12:44:09 -0700 |
parents | 6a991dcb52bb |
children | 2fe087c3e814 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2003, 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.oops; | |
26 | |
27 import java.io.*; | |
28 import java.util.*; | |
29 import sun.jvm.hotspot.code.*; | |
30 import sun.jvm.hotspot.debugger.*; | |
31 import sun.jvm.hotspot.interpreter.*; | |
32 import sun.jvm.hotspot.memory.*; | |
33 import sun.jvm.hotspot.runtime.*; | |
34 import sun.jvm.hotspot.types.*; | |
35 import sun.jvm.hotspot.utilities.*; | |
36 | |
37 public class ConstMethod extends Oop { | |
38 static { | |
39 VM.registerVMInitializedObserver(new Observer() { | |
40 public void update(Observable o, Object data) { | |
41 initialize(VM.getVM().getTypeDataBase()); | |
42 } | |
43 }); | |
44 } | |
45 | |
46 // anon-enum constants for _flags. | |
47 private static int HAS_LINENUMBER_TABLE; | |
48 private static int HAS_CHECKED_EXCEPTIONS; | |
49 private static int HAS_LOCALVARIABLE_TABLE; | |
50 | |
51 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { | |
52 Type type = db.lookupType("constMethodOopDesc"); | |
53 // Backpointer to non-const methodOop | |
54 method = new OopField(type.getOopField("_method"), 0); | |
55 // The exception handler table. 4-tuples of ints [start_pc, end_pc, | |
56 // handler_pc, catch_type index] For methods with no exceptions the | |
57 // table is pointing to Universe::the_empty_int_array | |
58 exceptionTable = new OopField(type.getOopField("_exception_table"), 0); | |
59 constMethodSize = new CIntField(type.getCIntegerField("_constMethod_size"), 0); | |
60 flags = new ByteField(type.getJByteField("_flags"), 0); | |
61 | |
62 // enum constants for flags | |
63 HAS_LINENUMBER_TABLE = db.lookupIntConstant("constMethodOopDesc::_has_linenumber_table").intValue(); | |
64 HAS_CHECKED_EXCEPTIONS = db.lookupIntConstant("constMethodOopDesc::_has_checked_exceptions").intValue(); | |
65 HAS_LOCALVARIABLE_TABLE = db.lookupIntConstant("constMethodOopDesc::_has_localvariable_table").intValue(); | |
66 | |
67 // Size of Java bytecodes allocated immediately after constMethodOop. | |
68 codeSize = new CIntField(type.getCIntegerField("_code_size"), 0); | |
69 nameIndex = new CIntField(type.getCIntegerField("_name_index"), 0); | |
70 signatureIndex = new CIntField(type.getCIntegerField("_signature_index"), 0); | |
71 genericSignatureIndex = new CIntField(type.getCIntegerField("_generic_signature_index"),0); | |
72 | |
73 // start of byte code | |
74 bytecodeOffset = type.getSize(); | |
75 | |
76 type = db.lookupType("CheckedExceptionElement"); | |
77 checkedExceptionElementSize = type.getSize(); | |
78 | |
79 type = db.lookupType("LocalVariableTableElement"); | |
80 localVariableTableElementSize = type.getSize(); | |
81 } | |
82 | |
83 ConstMethod(OopHandle handle, ObjectHeap heap) { | |
84 super(handle, heap); | |
85 } | |
86 | |
87 // Fields | |
88 private static OopField method; | |
89 private static OopField exceptionTable; | |
90 private static CIntField constMethodSize; | |
91 private static ByteField flags; | |
92 private static CIntField codeSize; | |
93 private static CIntField nameIndex; | |
94 private static CIntField signatureIndex; | |
95 private static CIntField genericSignatureIndex; | |
96 | |
97 // start of bytecode | |
98 private static long bytecodeOffset; | |
99 | |
100 private static long checkedExceptionElementSize; | |
101 private static long localVariableTableElementSize; | |
102 | |
103 // Accessors for declared fields | |
104 public Method getMethod() { | |
105 return (Method) method.getValue(this); | |
106 } | |
107 | |
108 public TypeArray getExceptionTable() { | |
109 return (TypeArray) exceptionTable.getValue(this); | |
110 } | |
111 | |
112 public long getConstMethodSize() { | |
113 return constMethodSize.getValue(this); | |
114 } | |
115 | |
116 public byte getFlags() { | |
117 return flags.getValue(this); | |
118 } | |
119 | |
120 public long getCodeSize() { | |
121 return codeSize.getValue(this); | |
122 } | |
123 | |
124 public long getNameIndex() { | |
125 return nameIndex.getValue(this); | |
126 } | |
127 | |
128 public long getSignatureIndex() { | |
129 return signatureIndex.getValue(this); | |
130 } | |
131 | |
132 public long getGenericSignatureIndex() { | |
133 return genericSignatureIndex.getValue(this); | |
134 } | |
135 | |
136 public Symbol getName() { | |
137 return getMethod().getName(); | |
138 } | |
139 | |
140 public Symbol getSignature() { | |
141 return getMethod().getSignature(); | |
142 } | |
143 | |
144 public Symbol getGenericSignature() { | |
145 return getMethod().getGenericSignature(); | |
146 } | |
147 | |
148 // bytecode accessors | |
149 | |
150 /** Get a bytecode or breakpoint at the given bci */ | |
151 public int getBytecodeOrBPAt(int bci) { | |
152 return getHandle().getJByteAt(bytecodeOffset + bci) & 0xFF; | |
153 } | |
154 | |
155 public byte getBytecodeByteArg(int bci) { | |
156 return (byte) getBytecodeOrBPAt(bci); | |
157 } | |
158 | |
159 /** Fetches a 16-bit big-endian ("Java ordered") value from the | |
160 bytecode stream */ | |
161 public short getBytecodeShortArg(int bci) { | |
162 int hi = getBytecodeOrBPAt(bci); | |
163 int lo = getBytecodeOrBPAt(bci + 1); | |
164 return (short) ((hi << 8) | lo); | |
165 } | |
166 | |
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167 /** Fetches a 16-bit native ordered value from the |
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168 bytecode stream */ |
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169 public short getNativeShortArg(int bci) { |
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170 int hi = getBytecodeOrBPAt(bci); |
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171 int lo = getBytecodeOrBPAt(bci + 1); |
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172 if (VM.getVM().isBigEndian()) { |
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173 return (short) ((hi << 8) | lo); |
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174 } else { |
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175 return (short) ((lo << 8) | hi); |
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176 } |
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177 } |
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178 |
0 | 179 /** Fetches a 32-bit big-endian ("Java ordered") value from the |
180 bytecode stream */ | |
181 public int getBytecodeIntArg(int bci) { | |
182 int b4 = getBytecodeOrBPAt(bci); | |
183 int b3 = getBytecodeOrBPAt(bci + 1); | |
184 int b2 = getBytecodeOrBPAt(bci + 2); | |
185 int b1 = getBytecodeOrBPAt(bci + 3); | |
186 | |
187 return (b4 << 24) | (b3 << 16) | (b2 << 8) | b1; | |
188 } | |
189 | |
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190 /** Fetches a 32-bit native ordered value from the |
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191 bytecode stream */ |
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192 public int getNativeIntArg(int bci) { |
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193 int b4 = getBytecodeOrBPAt(bci); |
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194 int b3 = getBytecodeOrBPAt(bci + 1); |
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195 int b2 = getBytecodeOrBPAt(bci + 2); |
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196 int b1 = getBytecodeOrBPAt(bci + 3); |
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197 |
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198 if (VM.getVM().isBigEndian()) { |
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199 return (b4 << 24) | (b3 << 16) | (b2 << 8) | b1; |
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200 } else { |
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201 return (b1 << 24) | (b2 << 16) | (b3 << 8) | b4; |
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202 } |
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203 } |
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204 |
0 | 205 public byte[] getByteCode() { |
206 byte[] bc = new byte[ (int) getCodeSize() ]; | |
207 for( int i=0; i < bc.length; i++ ) | |
208 { | |
209 long offs = bytecodeOffset + i; | |
210 bc[i] = getHandle().getJByteAt( offs ); | |
211 } | |
212 return bc; | |
213 } | |
214 | |
215 public long getObjectSize() { | |
216 return getConstMethodSize() * getHeap().getOopSize(); | |
217 } | |
218 | |
219 public void printValueOn(PrintStream tty) { | |
220 tty.print("ConstMethod " + getName().asString() + getSignature().asString() + "@" + getHandle()); | |
221 } | |
222 | |
223 public void iterateFields(OopVisitor visitor, boolean doVMFields) { | |
224 super.iterateFields(visitor, doVMFields); | |
225 if (doVMFields) { | |
226 visitor.doOop(method, true); | |
227 visitor.doOop(exceptionTable, true); | |
228 visitor.doCInt(constMethodSize, true); | |
229 visitor.doByte(flags, true); | |
230 visitor.doCInt(codeSize, true); | |
231 visitor.doCInt(nameIndex, true); | |
232 visitor.doCInt(signatureIndex, true); | |
233 visitor.doCInt(genericSignatureIndex, true); | |
234 visitor.doCInt(codeSize, true); | |
235 } | |
236 } | |
237 | |
238 // Accessors | |
239 | |
240 public boolean hasLineNumberTable() { | |
241 return (getFlags() & HAS_LINENUMBER_TABLE) != 0; | |
242 } | |
243 | |
244 public int getLineNumberFromBCI(int bci) { | |
245 if (!VM.getVM().isCore()) { | |
246 if (bci == DebugInformationRecorder.SYNCHRONIZATION_ENTRY_BCI) bci = 0; | |
247 } | |
248 | |
249 if (isNative()) { | |
250 return -1; | |
251 } | |
252 | |
253 if (Assert.ASSERTS_ENABLED) { | |
254 Assert.that(bci == 0 || 0 <= bci && bci < getCodeSize(), "illegal bci"); | |
255 } | |
256 int bestBCI = 0; | |
257 int bestLine = -1; | |
258 if (hasLineNumberTable()) { | |
259 // The line numbers are a short array of 2-tuples [start_pc, line_number]. | |
260 // Not necessarily sorted and not necessarily one-to-one. | |
261 CompressedLineNumberReadStream stream = | |
262 new CompressedLineNumberReadStream(getHandle(), (int) offsetOfCompressedLineNumberTable()); | |
263 while (stream.readPair()) { | |
264 if (stream.bci() == bci) { | |
265 // perfect match | |
266 return stream.line(); | |
267 } else { | |
268 // update best_bci/line | |
269 if (stream.bci() < bci && stream.bci() >= bestBCI) { | |
270 bestBCI = stream.bci(); | |
271 bestLine = stream.line(); | |
272 } | |
273 } | |
274 } | |
275 } | |
276 return bestLine; | |
277 } | |
278 | |
279 public LineNumberTableElement[] getLineNumberTable() { | |
280 if (Assert.ASSERTS_ENABLED) { | |
281 Assert.that(hasLineNumberTable(), | |
282 "should only be called if table is present"); | |
283 } | |
284 int len = getLineNumberTableLength(); | |
285 CompressedLineNumberReadStream stream = | |
286 new CompressedLineNumberReadStream(getHandle(), (int) offsetOfCompressedLineNumberTable()); | |
287 LineNumberTableElement[] ret = new LineNumberTableElement[len]; | |
288 | |
289 for (int idx = 0; idx < len; idx++) { | |
290 stream.readPair(); | |
291 ret[idx] = new LineNumberTableElement(stream.bci(), stream.line()); | |
292 } | |
293 return ret; | |
294 } | |
295 | |
296 public boolean hasLocalVariableTable() { | |
297 return (getFlags() & HAS_LOCALVARIABLE_TABLE) != 0; | |
298 } | |
299 | |
300 public Symbol getLocalVariableName(int bci, int slot) { | |
301 return getMethod().getLocalVariableName(bci, slot); | |
302 } | |
303 | |
304 /** Should only be called if table is present */ | |
305 public LocalVariableTableElement[] getLocalVariableTable() { | |
306 if (Assert.ASSERTS_ENABLED) { | |
307 Assert.that(hasLocalVariableTable(), "should only be called if table is present"); | |
308 } | |
309 LocalVariableTableElement[] ret = new LocalVariableTableElement[getLocalVariableTableLength()]; | |
310 long offset = offsetOfLocalVariableTable(); | |
311 for (int i = 0; i < ret.length; i++) { | |
312 ret[i] = new LocalVariableTableElement(getHandle(), offset); | |
313 offset += localVariableTableElementSize; | |
314 } | |
315 return ret; | |
316 } | |
317 | |
318 public boolean hasCheckedExceptions() { | |
319 return (getFlags() & HAS_CHECKED_EXCEPTIONS) != 0; | |
320 } | |
321 | |
322 public CheckedExceptionElement[] getCheckedExceptions() { | |
323 if (Assert.ASSERTS_ENABLED) { | |
324 Assert.that(hasCheckedExceptions(), "should only be called if table is present"); | |
325 } | |
326 CheckedExceptionElement[] ret = new CheckedExceptionElement[getCheckedExceptionsLength()]; | |
327 long offset = offsetOfCheckedExceptions(); | |
328 for (int i = 0; i < ret.length; i++) { | |
329 ret[i] = new CheckedExceptionElement(getHandle(), offset); | |
330 offset += checkedExceptionElementSize; | |
331 } | |
332 return ret; | |
333 } | |
334 | |
335 | |
336 //--------------------------------------------------------------------------- | |
337 // Internals only below this point | |
338 // | |
339 | |
340 private boolean isNative() { | |
341 return getMethod().isNative(); | |
342 } | |
343 | |
344 // Offset of end of code | |
345 private long offsetOfCodeEnd() { | |
346 return bytecodeOffset + getCodeSize(); | |
347 } | |
348 | |
349 // Offset of start of compressed line number table (see methodOop.hpp) | |
350 private long offsetOfCompressedLineNumberTable() { | |
351 return offsetOfCodeEnd() + (isNative() ? 2 * VM.getVM().getAddressSize() : 0); | |
352 } | |
353 | |
354 // Offset of last short in methodOop | |
355 private long offsetOfLastU2Element() { | |
356 return getObjectSize() - 2; | |
357 } | |
358 | |
359 private long offsetOfCheckedExceptionsLength() { | |
360 return offsetOfLastU2Element(); | |
361 } | |
362 | |
363 private int getCheckedExceptionsLength() { | |
364 if (hasCheckedExceptions()) { | |
365 return (int) getHandle().getCIntegerAt(offsetOfCheckedExceptionsLength(), 2, true); | |
366 } else { | |
367 return 0; | |
368 } | |
369 } | |
370 | |
371 // Offset of start of checked exceptions | |
372 private long offsetOfCheckedExceptions() { | |
373 long offset = offsetOfCheckedExceptionsLength(); | |
374 long length = getCheckedExceptionsLength(); | |
375 if (Assert.ASSERTS_ENABLED) { | |
376 Assert.that(length > 0, "should only be called if table is present"); | |
377 } | |
378 offset -= length * checkedExceptionElementSize; | |
379 return offset; | |
380 } | |
381 | |
382 private int getLineNumberTableLength() { | |
383 int len = 0; | |
384 if (hasLineNumberTable()) { | |
385 CompressedLineNumberReadStream stream = | |
386 new CompressedLineNumberReadStream(getHandle(), (int) offsetOfCompressedLineNumberTable()); | |
387 while (stream.readPair()) { | |
388 len += 1; | |
389 } | |
390 } | |
391 return len; | |
392 } | |
393 | |
394 private int getLocalVariableTableLength() { | |
395 if (hasLocalVariableTable()) { | |
396 return (int) getHandle().getCIntegerAt(offsetOfLocalVariableTableLength(), 2, true); | |
397 } else { | |
398 return 0; | |
399 } | |
400 } | |
401 | |
402 // Offset of local variable table length | |
403 private long offsetOfLocalVariableTableLength() { | |
404 if (Assert.ASSERTS_ENABLED) { | |
405 Assert.that(hasLocalVariableTable(), "should only be called if table is present"); | |
406 } | |
407 if (hasCheckedExceptions()) { | |
408 return offsetOfCheckedExceptions() - 2; | |
409 } else { | |
410 return offsetOfLastU2Element(); | |
411 } | |
412 } | |
413 | |
414 private long offsetOfLocalVariableTable() { | |
415 long offset = offsetOfLocalVariableTableLength(); | |
416 long length = getLocalVariableTableLength(); | |
417 if (Assert.ASSERTS_ENABLED) { | |
418 Assert.that(length > 0, "should only be called if table is present"); | |
419 } | |
420 offset -= length * localVariableTableElementSize; | |
421 return offset; | |
422 } | |
423 | |
424 } |