Mercurial > hg > graal-jvmci-8
annotate agent/src/share/classes/sun/jvm/hotspot/runtime/VM.java @ 1579:e9ff18c4ace7
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author | jrose |
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date | Wed, 02 Jun 2010 22:45:42 -0700 |
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0 | 1 /* |
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2 * Copyright (c) 2000, 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.runtime; | |
26 | |
27 import java.io.*; | |
28 import java.net.*; | |
29 import java.util.*; | |
30 import java.util.regex.*; | |
31 import sun.jvm.hotspot.code.*; | |
32 import sun.jvm.hotspot.c1.*; | |
33 import sun.jvm.hotspot.debugger.*; | |
34 import sun.jvm.hotspot.interpreter.*; | |
35 import sun.jvm.hotspot.memory.*; | |
36 import sun.jvm.hotspot.oops.*; | |
37 import sun.jvm.hotspot.types.*; | |
38 import sun.jvm.hotspot.utilities.*; | |
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39 import sun.jvm.hotspot.runtime.*; |
0 | 40 |
41 /** <P> This class encapsulates the global state of the VM; the | |
42 universe, object heap, interpreter, etc. It is a Singleton and | |
43 must be initialized with a call to initialize() before calling | |
44 getVM(). </P> | |
45 | |
46 <P> Many auxiliary classes (i.e., most of the VMObjects) keep | |
47 needed field offsets in the form of static Field objects. In a | |
48 debugging system, the VM might be shutdown and re-initialized (on | |
49 a differently-configured build, i.e., 32- vs. 64-bit), and all old | |
50 cached state (including fields and field offsets) must be | |
51 flushed. </P> | |
52 | |
53 <P> An Observer pattern is used to implement the initialization of | |
54 such classes. Each such class, in its static initializer, | |
55 registers an Observer with the VM class via | |
56 VM.registerVMInitializedObserver(). This Observer is guaranteed to | |
57 be notified whenever the VM is initialized (or re-initialized). To | |
58 implement the first-time initialization, the observer is also | |
59 notified when it registers itself with the VM. (For bootstrapping | |
60 reasons, this implies that the constructor of VM can not | |
61 instantiate any such objects, since VM.soleInstance will not have | |
62 been set yet. This is a bootstrapping issue which may have to be | |
63 revisited later.) </P> | |
64 */ | |
65 | |
66 public class VM { | |
67 private static VM soleInstance; | |
68 private static List vmInitializedObservers = new ArrayList(); | |
69 private List vmResumedObservers = new ArrayList(); | |
70 private List vmSuspendedObservers = new ArrayList(); | |
71 private TypeDataBase db; | |
72 private boolean isBigEndian; | |
73 /** This is only present if in a debugging system */ | |
74 private JVMDebugger debugger; | |
75 private long stackBias; | |
76 private long logAddressSize; | |
77 private Universe universe; | |
78 private ObjectHeap heap; | |
79 private SymbolTable symbols; | |
80 private StringTable strings; | |
81 private SystemDictionary dict; | |
82 private Threads threads; | |
83 private ObjectSynchronizer synchronizer; | |
84 private JNIHandles handles; | |
85 private Interpreter interpreter; | |
86 private StubRoutines stubRoutines; | |
87 private Bytes bytes; | |
88 /** Flags indicating whether we are attached to a core, C1, or C2 build */ | |
89 private boolean usingClientCompiler; | |
90 private boolean usingServerCompiler; | |
91 /** Flag indicating whether UseTLAB is turned on */ | |
92 private boolean useTLAB; | |
93 /** alignment constants */ | |
94 private boolean isLP64; | |
95 private int bytesPerLong; | |
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96 private int objectAlignmentInBytes; |
0 | 97 private int minObjAlignmentInBytes; |
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98 private int logMinObjAlignmentInBytes; |
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99 private int heapWordSize; |
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100 private int heapOopSize; |
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101 private int oopSize; |
0 | 102 /** This is only present in a non-core build */ |
103 private CodeCache codeCache; | |
104 /** This is only present in a C1 build */ | |
105 private Runtime1 runtime1; | |
106 /** These constants come from globalDefinitions.hpp */ | |
107 private int invocationEntryBCI; | |
108 private int invalidOSREntryBCI; | |
109 private ReversePtrs revPtrs; | |
110 private VMRegImpl vmregImpl; | |
111 | |
112 // System.getProperties from debuggee VM | |
113 private Properties sysProps; | |
114 | |
115 // VM version strings come from Abstract_VM_Version class | |
116 private String vmRelease; | |
117 private String vmInternalInfo; | |
118 | |
119 private Flag[] commandLineFlags; | |
120 private Map flagsMap; | |
121 | |
122 private static Type intxType; | |
123 private static Type uintxType; | |
124 private static CIntegerType boolType; | |
125 private Boolean sharingEnabled; | |
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126 private Boolean compressedOopsEnabled; |
0 | 127 |
128 // command line flags supplied to VM - see struct Flag in globals.hpp | |
129 public static final class Flag { | |
130 private String type; | |
131 private String name; | |
132 private Address addr; | |
133 private String kind; | |
134 | |
135 private Flag(String type, String name, Address addr, String kind) { | |
136 this.type = type; | |
137 this.name = name; | |
138 this.addr = addr; | |
139 this.kind = kind; | |
140 } | |
141 | |
142 public String getType() { | |
143 return type; | |
144 } | |
145 | |
146 public String getName() { | |
147 return name; | |
148 } | |
149 | |
150 public Address getAddress() { | |
151 return addr; | |
152 } | |
153 | |
154 public String getKind() { | |
155 return kind; | |
156 } | |
157 | |
158 public boolean isBool() { | |
159 return type.equals("bool"); | |
160 } | |
161 | |
162 public boolean getBool() { | |
163 if (Assert.ASSERTS_ENABLED) { | |
164 Assert.that(isBool(), "not a bool flag!"); | |
165 } | |
166 return addr.getCIntegerAt(0, boolType.getSize(), boolType.isUnsigned()) | |
167 != 0; | |
168 } | |
169 | |
170 public boolean isIntx() { | |
171 return type.equals("intx"); | |
172 } | |
173 | |
174 public long getIntx() { | |
175 if (Assert.ASSERTS_ENABLED) { | |
176 Assert.that(isIntx(), "not a intx flag!"); | |
177 } | |
178 return addr.getCIntegerAt(0, intxType.getSize(), false); | |
179 } | |
180 | |
181 public boolean isUIntx() { | |
182 return type.equals("uintx"); | |
183 } | |
184 | |
185 public long getUIntx() { | |
186 if (Assert.ASSERTS_ENABLED) { | |
187 Assert.that(isUIntx(), "not a uintx flag!"); | |
188 } | |
189 return addr.getCIntegerAt(0, uintxType.getSize(), true); | |
190 } | |
191 | |
192 public String getValue() { | |
193 if (isBool()) { | |
194 return new Boolean(getBool()).toString(); | |
195 } else if (isIntx()) { | |
196 return new Long(getIntx()).toString(); | |
197 } else if (isUIntx()) { | |
198 return new Long(getUIntx()).toString(); | |
199 } else { | |
200 return null; | |
201 } | |
202 } | |
203 }; | |
204 | |
205 private static void checkVMVersion(String vmRelease) { | |
206 if (System.getProperty("sun.jvm.hotspot.runtime.VM.disableVersionCheck") == null) { | |
207 // read sa build version. | |
208 String versionProp = "sun.jvm.hotspot.runtime.VM.saBuildVersion"; | |
209 String saVersion = saProps.getProperty(versionProp); | |
210 if (saVersion == null) | |
211 throw new RuntimeException("Missing property " + versionProp); | |
212 | |
213 // Strip nonproduct VM version substring (note: saVersion doesn't have it). | |
214 String vmVersion = vmRelease.replaceAll("(-fastdebug)|(-debug)|(-jvmg)|(-optimized)|(-profiled)",""); | |
215 | |
216 if (saVersion.equals(vmVersion)) { | |
217 // Exact match | |
218 return; | |
219 } | |
220 if (saVersion.indexOf('-') == saVersion.lastIndexOf('-') && | |
221 vmVersion.indexOf('-') == vmVersion.lastIndexOf('-')) { | |
222 // Throw exception if different release versions: | |
223 // <major>.<minor>-b<n> | |
224 throw new VMVersionMismatchException(saVersion, vmRelease); | |
225 } else { | |
226 // Otherwise print warning to allow mismatch not release versions | |
227 // during development. | |
228 System.err.println("WARNING: Hotspot VM version " + vmRelease + | |
229 " does not match with SA version " + saVersion + | |
230 "." + " You may see unexpected results. "); | |
231 } | |
232 } else { | |
233 System.err.println("WARNING: You have disabled SA and VM version check. You may be " + | |
234 "using incompatible version of SA and you may see unexpected " + | |
235 "results."); | |
236 } | |
237 } | |
238 | |
239 private static final boolean disableDerivedPrinterTableCheck; | |
240 private static final Properties saProps; | |
241 | |
242 static { | |
243 saProps = new Properties(); | |
244 URL url = null; | |
245 try { | |
246 url = VM.class.getClassLoader().getResource("sa.properties"); | |
247 saProps.load(new BufferedInputStream(url.openStream())); | |
248 } catch (Exception e) { | |
249 throw new RuntimeException("Unable to load properties " + | |
250 (url == null ? "null" : url.toString()) + | |
251 ": " + e.getMessage()); | |
252 } | |
253 | |
254 disableDerivedPrinterTableCheck = System.getProperty("sun.jvm.hotspot.runtime.VM.disableDerivedPointerTableCheck") != null; | |
255 } | |
256 | |
257 private VM(TypeDataBase db, JVMDebugger debugger, boolean isBigEndian) { | |
258 this.db = db; | |
259 this.debugger = debugger; | |
260 this.isBigEndian = isBigEndian; | |
261 | |
262 // Note that we don't construct universe, heap, threads, | |
263 // interpreter, or stubRoutines here (any more). The current | |
264 // initialization mechanisms require that the VM be completely set | |
265 // up (i.e., out of its constructor, with soleInstance assigned) | |
266 // before their static initializers are run. | |
267 | |
268 if (db.getAddressSize() == 4) { | |
269 logAddressSize = 2; | |
270 } else if (db.getAddressSize() == 8) { | |
271 logAddressSize = 3; | |
272 } else { | |
273 throw new RuntimeException("Address size " + db.getAddressSize() + " not yet supported"); | |
274 } | |
275 | |
276 // read VM version info | |
277 try { | |
278 Type vmVersion = db.lookupType("Abstract_VM_Version"); | |
279 Address releaseAddr = vmVersion.getAddressField("_s_vm_release").getValue(); | |
280 vmRelease = CStringUtilities.getString(releaseAddr); | |
281 Address vmInternalInfoAddr = vmVersion.getAddressField("_s_internal_vm_info_string").getValue(); | |
282 vmInternalInfo = CStringUtilities.getString(vmInternalInfoAddr); | |
283 } catch (Exception exp) { | |
284 throw new RuntimeException("can't determine target's VM version : " + exp.getMessage()); | |
285 } | |
286 | |
287 checkVMVersion(vmRelease); | |
288 | |
289 stackBias = db.lookupIntConstant("STACK_BIAS").intValue(); | |
290 invocationEntryBCI = db.lookupIntConstant("InvocationEntryBci").intValue(); | |
291 invalidOSREntryBCI = db.lookupIntConstant("InvalidOSREntryBci").intValue(); | |
292 | |
293 // We infer the presence of C1 or C2 from a couple of fields we | |
294 // already have present in the type database | |
295 { | |
296 Type type = db.lookupType("methodOopDesc"); | |
297 if (type.getField("_from_compiled_entry", false, false) == null) { | |
298 // Neither C1 nor C2 is present | |
299 usingClientCompiler = false; | |
300 usingServerCompiler = false; | |
301 } else { | |
302 // Determine whether C2 is present | |
303 if (type.getField("_interpreter_invocation_count", false, false) != null) { | |
304 usingServerCompiler = true; | |
305 } else { | |
306 usingClientCompiler = true; | |
307 } | |
308 } | |
309 } | |
310 | |
311 useTLAB = (db.lookupIntConstant("UseTLAB").intValue() != 0); | |
312 | |
313 if (debugger != null) { | |
314 isLP64 = debugger.getMachineDescription().isLP64(); | |
315 } | |
316 bytesPerLong = db.lookupIntConstant("BytesPerLong").intValue(); | |
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317 heapWordSize = db.lookupIntConstant("HeapWordSize").intValue(); |
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318 oopSize = db.lookupIntConstant("oopSize").intValue(); |
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319 |
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320 intxType = db.lookupType("intx"); |
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321 uintxType = db.lookupType("uintx"); |
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322 boolType = (CIntegerType) db.lookupType("bool"); |
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323 |
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324 minObjAlignmentInBytes = getObjectAlignmentInBytes(); |
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325 if (minObjAlignmentInBytes == 8) { |
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326 logMinObjAlignmentInBytes = 3; |
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327 } else if (minObjAlignmentInBytes == 16) { |
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328 logMinObjAlignmentInBytes = 4; |
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329 } else { |
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330 throw new RuntimeException("Object alignment " + minObjAlignmentInBytes + " not yet supported"); |
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331 } |
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332 |
749 | 333 if (isCompressedOopsEnabled()) { |
334 // Size info for oops within java objects is fixed | |
335 heapOopSize = (int)getIntSize(); | |
336 } else { | |
337 heapOopSize = (int)getOopSize(); | |
338 } | |
0 | 339 } |
340 | |
341 /** This could be used by a reflective runtime system */ | |
342 public static void initialize(TypeDataBase db, boolean isBigEndian) { | |
343 if (soleInstance != null) { | |
344 throw new RuntimeException("Attempt to initialize VM twice"); | |
345 } | |
346 soleInstance = new VM(db, null, isBigEndian); | |
347 for (Iterator iter = vmInitializedObservers.iterator(); iter.hasNext(); ) { | |
348 ((Observer) iter.next()).update(null, null); | |
349 } | |
350 } | |
351 | |
352 /** This is used by the debugging system */ | |
353 public static void initialize(TypeDataBase db, JVMDebugger debugger) { | |
354 if (soleInstance != null) { | |
355 throw new RuntimeException("Attempt to initialize VM twice"); | |
356 } | |
357 soleInstance = new VM(db, debugger, debugger.getMachineDescription().isBigEndian()); | |
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358 |
0 | 359 for (Iterator iter = vmInitializedObservers.iterator(); iter.hasNext(); ) { |
360 ((Observer) iter.next()).update(null, null); | |
361 } | |
650 | 362 |
749 | 363 debugger.putHeapConst(soleInstance.getHeapOopSize(), Universe.getNarrowOopBase(), |
364 Universe.getNarrowOopShift()); | |
0 | 365 } |
366 | |
367 /** This is used by the debugging system */ | |
368 public static void shutdown() { | |
369 soleInstance = null; | |
370 } | |
371 | |
372 /** This is used by both the debugger and any runtime system. It is | |
373 the basic mechanism by which classes which mimic underlying VM | |
374 functionality cause themselves to be initialized. The given | |
375 observer will be notified (with arguments (null, null)) when the | |
376 VM is re-initialized, as well as when it registers itself with | |
377 the VM. */ | |
378 public static void registerVMInitializedObserver(Observer o) { | |
379 vmInitializedObservers.add(o); | |
380 o.update(null, null); | |
381 } | |
382 | |
383 /** This is the primary accessor used by both the debugger and any | |
384 potential runtime system */ | |
385 public static VM getVM() { | |
386 if (soleInstance == null) { | |
387 throw new RuntimeException("VM.initialize() was not yet called"); | |
388 } | |
389 return soleInstance; | |
390 } | |
391 | |
392 /** This is only used by the debugging system. The given observer | |
393 will be notified if the underlying VM resumes execution. NOTE | |
394 that the given observer is not triggered if the VM is currently | |
395 running and therefore differs in behavior from {@link | |
396 #registerVMInitializedObserver} (because of the possibility of | |
397 race conditions if the observer is added while the VM is being | |
398 suspended or resumed). */ | |
399 public void registerVMResumedObserver(Observer o) { | |
400 vmResumedObservers.add(o); | |
401 } | |
402 | |
403 /** This is only used by the debugging system. The given observer | |
404 will be notified if the underlying VM suspends execution. NOTE | |
405 that the given observer is not triggered if the VM is currently | |
406 suspended and therefore differs in behavior from {@link | |
407 #registerVMInitializedObserver} (because of the possibility of | |
408 race conditions if the observer is added while the VM is being | |
409 suspended or resumed). */ | |
410 public void registerVMSuspendedObserver(Observer o) { | |
411 vmSuspendedObservers.add(o); | |
412 } | |
413 | |
414 /** This is only used by the debugging system. Informs all | |
415 registered resumption observers that the VM has been resumed. | |
416 The application is responsible for actually having performed the | |
417 resumption. No OopHandles must be used after this point, as they | |
418 may move in the target address space due to garbage | |
419 collection. */ | |
420 public void fireVMResumed() { | |
421 for (Iterator iter = vmResumedObservers.iterator(); iter.hasNext(); ) { | |
422 ((Observer) iter.next()).update(null, null); | |
423 } | |
424 } | |
425 | |
426 /** This is only used by the debugging system. Informs all | |
427 registered suspension observers that the VM has been suspended. | |
428 The application is responsible for actually having performed the | |
429 suspension. Garbage collection must be forbidden at this point; | |
430 for example, a JPDA-level suspension is not adequate since the | |
431 VM thread may still be running. */ | |
432 public void fireVMSuspended() { | |
433 for (Iterator iter = vmSuspendedObservers.iterator(); iter.hasNext(); ) { | |
434 ((Observer) iter.next()).update(null, null); | |
435 } | |
436 } | |
437 | |
438 /** Returns the OS this VM is running on. Notice that by delegating | |
439 to the debugger we can transparently support remote | |
440 debugging. */ | |
441 public String getOS() { | |
442 if (debugger != null) { | |
443 return debugger.getOS(); | |
444 } | |
445 return PlatformInfo.getOS(); | |
446 } | |
447 | |
448 /** Returns the CPU this VM is running on. Notice that by delegating | |
449 to the debugger we can transparently support remote | |
450 debugging. */ | |
451 public String getCPU() { | |
452 if (debugger != null) { | |
453 return debugger.getCPU(); | |
454 } | |
455 return PlatformInfo.getCPU(); | |
456 } | |
457 | |
458 public Type lookupType(String cTypeName) { | |
459 return db.lookupType(cTypeName); | |
460 } | |
461 | |
462 public Integer lookupIntConstant(String name) { | |
463 return db.lookupIntConstant(name); | |
464 } | |
465 | |
466 public long getAddressSize() { | |
467 return db.getAddressSize(); | |
468 } | |
469 | |
470 public long getOopSize() { | |
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471 return oopSize; |
0 | 472 } |
473 | |
474 public long getLogAddressSize() { | |
475 return logAddressSize; | |
476 } | |
477 | |
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478 public long getIntSize() { |
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479 return db.getJIntType().getSize(); |
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480 } |
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481 |
0 | 482 /** NOTE: this offset is in BYTES in this system! */ |
483 public long getStackBias() { | |
484 return stackBias; | |
485 } | |
486 | |
487 /** Indicates whether the underlying machine supports the LP64 data | |
488 model. This is needed for conditionalizing code in a few places */ | |
489 public boolean isLP64() { | |
490 if (Assert.ASSERTS_ENABLED) { | |
491 Assert.that(isDebugging(), "Debugging system only for now"); | |
492 } | |
493 return isLP64; | |
494 } | |
495 | |
496 /** Get bytes-per-long == long/double natural alignment. */ | |
497 public int getBytesPerLong() { | |
498 return bytesPerLong; | |
499 } | |
500 | |
501 /** Get minimum object alignment in bytes. */ | |
502 public int getMinObjAlignmentInBytes() { | |
503 return minObjAlignmentInBytes; | |
504 } | |
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505 public int getLogMinObjAlignmentInBytes() { |
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506 return logMinObjAlignmentInBytes; |
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507 } |
0 | 508 |
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509 public int getHeapWordSize() { |
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510 return heapWordSize; |
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511 } |
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512 |
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513 public int getHeapOopSize() { |
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514 return heapOopSize; |
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515 } |
0 | 516 /** Utility routine for getting data structure alignment correct */ |
517 public long alignUp(long size, long alignment) { | |
518 return (size + alignment - 1) & ~(alignment - 1); | |
519 } | |
520 | |
521 /** Utility routine for getting data structure alignment correct */ | |
522 public long alignDown(long size, long alignment) { | |
523 return size & ~(alignment - 1); | |
524 } | |
525 | |
526 /** Utility routine for building an int from two "unsigned" 16-bit | |
527 shorts */ | |
528 public int buildIntFromShorts(short low, short high) { | |
529 return (((int) high) << 16) | (((int) low) & 0xFFFF); | |
530 } | |
531 | |
532 /** Utility routine for building a long from two "unsigned" 32-bit | |
533 ints in <b>platform-dependent</b> order */ | |
534 public long buildLongFromIntsPD(int oneHalf, int otherHalf) { | |
535 if (isBigEndian) { | |
536 return (((long) otherHalf) << 32) | (((long) oneHalf) & 0x00000000FFFFFFFFL); | |
537 } else{ | |
538 return (((long) oneHalf) << 32) | (((long) otherHalf) & 0x00000000FFFFFFFFL); | |
539 } | |
540 } | |
541 | |
542 /** Indicates whether Thread-Local Allocation Buffers are used */ | |
543 public boolean getUseTLAB() { | |
544 return useTLAB; | |
545 } | |
546 | |
547 public TypeDataBase getTypeDataBase() { | |
548 return db; | |
549 } | |
550 | |
551 public Universe getUniverse() { | |
552 if (universe == null) { | |
553 universe = new Universe(); | |
554 } | |
555 return universe; | |
556 } | |
557 | |
558 public ObjectHeap getObjectHeap() { | |
559 if (heap == null) { | |
560 heap = new ObjectHeap(db); | |
561 } | |
562 return heap; | |
563 } | |
564 | |
565 public SymbolTable getSymbolTable() { | |
566 if (symbols == null) { | |
567 symbols = SymbolTable.getTheTable(); | |
568 } | |
569 return symbols; | |
570 } | |
571 | |
572 public StringTable getStringTable() { | |
573 if (strings == null) { | |
574 strings = StringTable.getTheTable(); | |
575 } | |
576 return strings; | |
577 } | |
578 | |
579 public SystemDictionary getSystemDictionary() { | |
580 if (dict == null) { | |
581 dict = new SystemDictionary(); | |
582 } | |
583 return dict; | |
584 } | |
585 | |
586 public Threads getThreads() { | |
587 if (threads == null) { | |
588 threads = new Threads(); | |
589 } | |
590 return threads; | |
591 } | |
592 | |
593 public ObjectSynchronizer getObjectSynchronizer() { | |
594 if (synchronizer == null) { | |
595 synchronizer = new ObjectSynchronizer(); | |
596 } | |
597 return synchronizer; | |
598 } | |
599 | |
600 public JNIHandles getJNIHandles() { | |
601 if (handles == null) { | |
602 handles = new JNIHandles(); | |
603 } | |
604 return handles; | |
605 } | |
606 | |
607 public Interpreter getInterpreter() { | |
608 if (interpreter == null) { | |
609 interpreter = new Interpreter(); | |
610 } | |
611 return interpreter; | |
612 } | |
613 | |
614 public StubRoutines getStubRoutines() { | |
615 if (stubRoutines == null) { | |
616 stubRoutines = new StubRoutines(); | |
617 } | |
618 return stubRoutines; | |
619 } | |
620 | |
621 public VMRegImpl getVMRegImplInfo() { | |
622 if (vmregImpl == null) { | |
623 vmregImpl = new VMRegImpl(); | |
624 } | |
625 return vmregImpl; | |
626 } | |
627 | |
628 public Bytes getBytes() { | |
629 if (bytes == null) { | |
630 bytes = new Bytes(debugger.getMachineDescription()); | |
631 } | |
632 return bytes; | |
633 } | |
634 | |
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635 /** Returns true if this is a isBigEndian, false otherwise */ |
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636 public boolean isBigEndian() { |
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637 return isBigEndian; |
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638 } |
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639 |
0 | 640 /** Returns true if this is a "core" build, false if either C1 or C2 |
641 is present */ | |
642 public boolean isCore() { | |
643 return (!(usingClientCompiler || usingServerCompiler)); | |
644 } | |
645 | |
646 /** Returns true if this is a C1 build, false otherwise */ | |
647 public boolean isClientCompiler() { | |
648 return usingClientCompiler; | |
649 } | |
650 | |
651 /** Returns true if this is a C2 build, false otherwise */ | |
652 public boolean isServerCompiler() { | |
653 return usingServerCompiler; | |
654 } | |
655 | |
656 /** Returns true if C2 derived pointer table should be used, false otherwise */ | |
657 public boolean useDerivedPointerTable() { | |
658 return !disableDerivedPrinterTableCheck; | |
659 } | |
660 | |
661 /** Returns the code cache; should not be used if is core build */ | |
662 public CodeCache getCodeCache() { | |
663 if (Assert.ASSERTS_ENABLED) { | |
664 Assert.that(!isCore(), "noncore builds only"); | |
665 } | |
666 if (codeCache == null) { | |
667 codeCache = new CodeCache(); | |
668 } | |
669 return codeCache; | |
670 } | |
671 | |
672 /** Should only be called for C1 builds */ | |
673 public Runtime1 getRuntime1() { | |
674 if (Assert.ASSERTS_ENABLED) { | |
675 Assert.that(isClientCompiler(), "C1 builds only"); | |
676 } | |
677 if (runtime1 == null) { | |
678 runtime1 = new Runtime1(); | |
679 } | |
680 return runtime1; | |
681 } | |
682 | |
683 /** Test to see whether we're in debugging mode (NOTE: this really | |
684 should not be tested by this code; currently only used in | |
685 StackFrameStream) */ | |
686 public boolean isDebugging() { | |
687 return (debugger != null); | |
688 } | |
689 | |
690 /** This is only used by the debugging (i.e., non-runtime) system */ | |
691 public JVMDebugger getDebugger() { | |
692 if (debugger == null) { | |
693 throw new RuntimeException("Attempt to use debugger in runtime system"); | |
694 } | |
695 return debugger; | |
696 } | |
697 | |
698 /** Indicates whether a given program counter is in Java code. This | |
699 includes but is not spanned by the interpreter and code cache. | |
700 Only used in the debugging system, for implementing | |
701 JavaThread.currentFrameGuess() on x86. */ | |
702 public boolean isJavaPCDbg(Address addr) { | |
703 // FIXME: this is not a complete enough set: must include areas | |
704 // like vtable stubs | |
705 return (getInterpreter().contains(addr) || | |
706 getCodeCache().contains(addr)); | |
707 } | |
708 | |
709 /** FIXME: figure out where to stick this */ | |
710 public int getInvocationEntryBCI() { | |
711 return invocationEntryBCI; | |
712 } | |
713 | |
714 /** FIXME: figure out where to stick this */ | |
715 public int getInvalidOSREntryBCI() { | |
716 return invalidOSREntryBCI; | |
717 } | |
718 | |
719 // FIXME: figure out where to stick this | |
720 public boolean wizardMode() { | |
721 return true; | |
722 } | |
723 | |
724 public ReversePtrs getRevPtrs() { | |
725 return revPtrs; | |
726 } | |
727 | |
728 public void setRevPtrs(ReversePtrs rp) { | |
729 revPtrs = rp; | |
730 } | |
731 | |
732 // returns null, if not available. | |
733 public String getVMRelease() { | |
734 return vmRelease; | |
735 } | |
736 | |
737 // returns null, if not available. | |
738 public String getVMInternalInfo() { | |
739 return vmInternalInfo; | |
740 } | |
741 | |
742 public boolean isSharingEnabled() { | |
743 if (sharingEnabled == null) { | |
744 Flag flag = getCommandLineFlag("UseSharedSpaces"); | |
745 sharingEnabled = (flag == null)? Boolean.FALSE : | |
746 (flag.getBool()? Boolean.TRUE: Boolean.FALSE); | |
747 } | |
748 return sharingEnabled.booleanValue(); | |
749 } | |
750 | |
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751 public boolean isCompressedOopsEnabled() { |
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752 if (compressedOopsEnabled == null) { |
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753 Flag flag = getCommandLineFlag("UseCompressedOops"); |
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754 compressedOopsEnabled = (flag == null) ? Boolean.FALSE: |
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755 (flag.getBool()? Boolean.TRUE: Boolean.FALSE); |
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756 } |
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757 return compressedOopsEnabled.booleanValue(); |
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758 } |
0 | 759 |
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760 public int getObjectAlignmentInBytes() { |
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761 if (objectAlignmentInBytes == 0) { |
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762 Flag flag = getCommandLineFlag("ObjectAlignmentInBytes"); |
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763 objectAlignmentInBytes = (flag == null) ? 8 : (int)flag.getIntx(); |
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764 } |
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765 return objectAlignmentInBytes; |
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766 } |
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767 |
0 | 768 // returns null, if not available. |
769 public Flag[] getCommandLineFlags() { | |
770 if (commandLineFlags == null) { | |
771 readCommandLineFlags(); | |
772 } | |
773 | |
774 return commandLineFlags; | |
775 } | |
776 | |
777 public Flag getCommandLineFlag(String name) { | |
778 if (flagsMap == null) { | |
779 flagsMap = new HashMap(); | |
780 Flag[] flags = getCommandLineFlags(); | |
781 for (int i = 0; i < flags.length; i++) { | |
782 flagsMap.put(flags[i].getName(), flags[i]); | |
783 } | |
784 } | |
785 return (Flag) flagsMap.get(name); | |
786 } | |
787 | |
788 private void readCommandLineFlags() { | |
789 // get command line flags | |
790 TypeDataBase db = getTypeDataBase(); | |
791 try { | |
792 Type flagType = db.lookupType("Flag"); | |
793 int numFlags = (int) flagType.getCIntegerField("numFlags").getValue(); | |
794 // NOTE: last flag contains null values. | |
795 commandLineFlags = new Flag[numFlags - 1]; | |
796 | |
797 Address flagAddr = flagType.getAddressField("flags").getValue(); | |
798 | |
799 AddressField typeFld = flagType.getAddressField("type"); | |
800 AddressField nameFld = flagType.getAddressField("name"); | |
801 AddressField addrFld = flagType.getAddressField("addr"); | |
802 AddressField kindFld = flagType.getAddressField("kind"); | |
803 | |
804 long flagSize = flagType.getSize(); // sizeof(Flag) | |
805 | |
806 // NOTE: last flag contains null values. | |
807 for (int f = 0; f < numFlags - 1; f++) { | |
808 String type = CStringUtilities.getString(typeFld.getValue(flagAddr)); | |
809 String name = CStringUtilities.getString(nameFld.getValue(flagAddr)); | |
810 Address addr = addrFld.getValue(flagAddr); | |
811 String kind = CStringUtilities.getString(kindFld.getValue(flagAddr)); | |
812 commandLineFlags[f] = new Flag(type, name, addr, kind); | |
813 flagAddr = flagAddr.addOffsetTo(flagSize); | |
814 } | |
815 | |
816 // sort flags by name | |
817 Arrays.sort(commandLineFlags, new Comparator() { | |
818 public int compare(Object o1, Object o2) { | |
819 Flag f1 = (Flag) o1; | |
820 Flag f2 = (Flag) o2; | |
821 return f1.getName().compareTo(f2.getName()); | |
822 } | |
823 }); | |
824 } catch (Exception exp) { | |
825 // ignore. may be older version. command line flags not available. | |
826 } | |
827 } | |
828 | |
829 public String getSystemProperty(String key) { | |
830 Properties props = getSystemProperties(); | |
831 return (props != null)? props.getProperty(key) : null; | |
832 } | |
833 | |
834 public Properties getSystemProperties() { | |
835 if (sysProps == null) { | |
836 readSystemProperties(); | |
837 } | |
838 return sysProps; | |
839 } | |
840 | |
841 private void readSystemProperties() { | |
842 InstanceKlass systemKls = getSystemDictionary().getSystemKlass(); | |
843 systemKls.iterate(new DefaultOopVisitor() { | |
844 ObjectReader objReader = new ObjectReader(); | |
845 public void doOop(sun.jvm.hotspot.oops.OopField field, boolean isVMField) { | |
846 if (field.getID().getName().equals("props")) { | |
847 try { | |
848 sysProps = (Properties) objReader.readObject(field.getValue(getObj())); | |
849 } catch (Exception e) { | |
850 if (Assert.ASSERTS_ENABLED) { | |
851 e.printStackTrace(); | |
852 } | |
853 } | |
854 } | |
855 } | |
856 }, false); | |
857 } | |
858 } |