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comparison agent/src/share/classes/sun/jvm/hotspot/runtime/VM.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 2000-2007 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.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.*; | |
39 | |
40 /** <P> This class encapsulates the global state of the VM; the | |
41 universe, object heap, interpreter, etc. It is a Singleton and | |
42 must be initialized with a call to initialize() before calling | |
43 getVM(). </P> | |
44 | |
45 <P> Many auxiliary classes (i.e., most of the VMObjects) keep | |
46 needed field offsets in the form of static Field objects. In a | |
47 debugging system, the VM might be shutdown and re-initialized (on | |
48 a differently-configured build, i.e., 32- vs. 64-bit), and all old | |
49 cached state (including fields and field offsets) must be | |
50 flushed. </P> | |
51 | |
52 <P> An Observer pattern is used to implement the initialization of | |
53 such classes. Each such class, in its static initializer, | |
54 registers an Observer with the VM class via | |
55 VM.registerVMInitializedObserver(). This Observer is guaranteed to | |
56 be notified whenever the VM is initialized (or re-initialized). To | |
57 implement the first-time initialization, the observer is also | |
58 notified when it registers itself with the VM. (For bootstrapping | |
59 reasons, this implies that the constructor of VM can not | |
60 instantiate any such objects, since VM.soleInstance will not have | |
61 been set yet. This is a bootstrapping issue which may have to be | |
62 revisited later.) </P> | |
63 */ | |
64 | |
65 public class VM { | |
66 private static VM soleInstance; | |
67 private static List vmInitializedObservers = new ArrayList(); | |
68 private List vmResumedObservers = new ArrayList(); | |
69 private List vmSuspendedObservers = new ArrayList(); | |
70 private TypeDataBase db; | |
71 private boolean isBigEndian; | |
72 /** This is only present if in a debugging system */ | |
73 private JVMDebugger debugger; | |
74 private long stackBias; | |
75 private long logAddressSize; | |
76 private Universe universe; | |
77 private ObjectHeap heap; | |
78 private SymbolTable symbols; | |
79 private StringTable strings; | |
80 private SystemDictionary dict; | |
81 private Threads threads; | |
82 private ObjectSynchronizer synchronizer; | |
83 private JNIHandles handles; | |
84 private Interpreter interpreter; | |
85 private StubRoutines stubRoutines; | |
86 private Bytes bytes; | |
87 /** Flags indicating whether we are attached to a core, C1, or C2 build */ | |
88 private boolean usingClientCompiler; | |
89 private boolean usingServerCompiler; | |
90 /** Flag indicating whether UseTLAB is turned on */ | |
91 private boolean useTLAB; | |
92 /** alignment constants */ | |
93 private boolean isLP64; | |
94 private int bytesPerLong; | |
95 private int minObjAlignmentInBytes; | |
96 /** This is only present in a non-core build */ | |
97 private CodeCache codeCache; | |
98 /** This is only present in a C1 build */ | |
99 private Runtime1 runtime1; | |
100 /** These constants come from globalDefinitions.hpp */ | |
101 private int invocationEntryBCI; | |
102 private int invalidOSREntryBCI; | |
103 private ReversePtrs revPtrs; | |
104 private VMRegImpl vmregImpl; | |
105 | |
106 // System.getProperties from debuggee VM | |
107 private Properties sysProps; | |
108 | |
109 // VM version strings come from Abstract_VM_Version class | |
110 private String vmRelease; | |
111 private String vmInternalInfo; | |
112 | |
113 private Flag[] commandLineFlags; | |
114 private Map flagsMap; | |
115 | |
116 private static Type intxType; | |
117 private static Type uintxType; | |
118 private static CIntegerType boolType; | |
119 private Boolean sharingEnabled; | |
120 | |
121 // command line flags supplied to VM - see struct Flag in globals.hpp | |
122 public static final class Flag { | |
123 private String type; | |
124 private String name; | |
125 private Address addr; | |
126 private String kind; | |
127 | |
128 private Flag(String type, String name, Address addr, String kind) { | |
129 this.type = type; | |
130 this.name = name; | |
131 this.addr = addr; | |
132 this.kind = kind; | |
133 } | |
134 | |
135 public String getType() { | |
136 return type; | |
137 } | |
138 | |
139 public String getName() { | |
140 return name; | |
141 } | |
142 | |
143 public Address getAddress() { | |
144 return addr; | |
145 } | |
146 | |
147 public String getKind() { | |
148 return kind; | |
149 } | |
150 | |
151 public boolean isBool() { | |
152 return type.equals("bool"); | |
153 } | |
154 | |
155 public boolean getBool() { | |
156 if (Assert.ASSERTS_ENABLED) { | |
157 Assert.that(isBool(), "not a bool flag!"); | |
158 } | |
159 return addr.getCIntegerAt(0, boolType.getSize(), boolType.isUnsigned()) | |
160 != 0; | |
161 } | |
162 | |
163 public boolean isIntx() { | |
164 return type.equals("intx"); | |
165 } | |
166 | |
167 public long getIntx() { | |
168 if (Assert.ASSERTS_ENABLED) { | |
169 Assert.that(isIntx(), "not a intx flag!"); | |
170 } | |
171 return addr.getCIntegerAt(0, intxType.getSize(), false); | |
172 } | |
173 | |
174 public boolean isUIntx() { | |
175 return type.equals("uintx"); | |
176 } | |
177 | |
178 public long getUIntx() { | |
179 if (Assert.ASSERTS_ENABLED) { | |
180 Assert.that(isUIntx(), "not a uintx flag!"); | |
181 } | |
182 return addr.getCIntegerAt(0, uintxType.getSize(), true); | |
183 } | |
184 | |
185 public String getValue() { | |
186 if (isBool()) { | |
187 return new Boolean(getBool()).toString(); | |
188 } else if (isIntx()) { | |
189 return new Long(getIntx()).toString(); | |
190 } else if (isUIntx()) { | |
191 return new Long(getUIntx()).toString(); | |
192 } else { | |
193 return null; | |
194 } | |
195 } | |
196 }; | |
197 | |
198 private static void checkVMVersion(String vmRelease) { | |
199 if (System.getProperty("sun.jvm.hotspot.runtime.VM.disableVersionCheck") == null) { | |
200 // read sa build version. | |
201 String versionProp = "sun.jvm.hotspot.runtime.VM.saBuildVersion"; | |
202 String saVersion = saProps.getProperty(versionProp); | |
203 if (saVersion == null) | |
204 throw new RuntimeException("Missing property " + versionProp); | |
205 | |
206 // Strip nonproduct VM version substring (note: saVersion doesn't have it). | |
207 String vmVersion = vmRelease.replaceAll("(-fastdebug)|(-debug)|(-jvmg)|(-optimized)|(-profiled)",""); | |
208 | |
209 if (saVersion.equals(vmVersion)) { | |
210 // Exact match | |
211 return; | |
212 } | |
213 if (saVersion.indexOf('-') == saVersion.lastIndexOf('-') && | |
214 vmVersion.indexOf('-') == vmVersion.lastIndexOf('-')) { | |
215 // Throw exception if different release versions: | |
216 // <major>.<minor>-b<n> | |
217 throw new VMVersionMismatchException(saVersion, vmRelease); | |
218 } else { | |
219 // Otherwise print warning to allow mismatch not release versions | |
220 // during development. | |
221 System.err.println("WARNING: Hotspot VM version " + vmRelease + | |
222 " does not match with SA version " + saVersion + | |
223 "." + " You may see unexpected results. "); | |
224 } | |
225 } else { | |
226 System.err.println("WARNING: You have disabled SA and VM version check. You may be " + | |
227 "using incompatible version of SA and you may see unexpected " + | |
228 "results."); | |
229 } | |
230 } | |
231 | |
232 private static final boolean disableDerivedPrinterTableCheck; | |
233 private static final Properties saProps; | |
234 | |
235 static { | |
236 saProps = new Properties(); | |
237 URL url = null; | |
238 try { | |
239 url = VM.class.getClassLoader().getResource("sa.properties"); | |
240 saProps.load(new BufferedInputStream(url.openStream())); | |
241 } catch (Exception e) { | |
242 throw new RuntimeException("Unable to load properties " + | |
243 (url == null ? "null" : url.toString()) + | |
244 ": " + e.getMessage()); | |
245 } | |
246 | |
247 disableDerivedPrinterTableCheck = System.getProperty("sun.jvm.hotspot.runtime.VM.disableDerivedPointerTableCheck") != null; | |
248 } | |
249 | |
250 private VM(TypeDataBase db, JVMDebugger debugger, boolean isBigEndian) { | |
251 this.db = db; | |
252 this.debugger = debugger; | |
253 this.isBigEndian = isBigEndian; | |
254 | |
255 // Note that we don't construct universe, heap, threads, | |
256 // interpreter, or stubRoutines here (any more). The current | |
257 // initialization mechanisms require that the VM be completely set | |
258 // up (i.e., out of its constructor, with soleInstance assigned) | |
259 // before their static initializers are run. | |
260 | |
261 if (db.getAddressSize() == 4) { | |
262 logAddressSize = 2; | |
263 } else if (db.getAddressSize() == 8) { | |
264 logAddressSize = 3; | |
265 } else { | |
266 throw new RuntimeException("Address size " + db.getAddressSize() + " not yet supported"); | |
267 } | |
268 | |
269 // read VM version info | |
270 try { | |
271 Type vmVersion = db.lookupType("Abstract_VM_Version"); | |
272 Address releaseAddr = vmVersion.getAddressField("_s_vm_release").getValue(); | |
273 vmRelease = CStringUtilities.getString(releaseAddr); | |
274 Address vmInternalInfoAddr = vmVersion.getAddressField("_s_internal_vm_info_string").getValue(); | |
275 vmInternalInfo = CStringUtilities.getString(vmInternalInfoAddr); | |
276 } catch (Exception exp) { | |
277 throw new RuntimeException("can't determine target's VM version : " + exp.getMessage()); | |
278 } | |
279 | |
280 checkVMVersion(vmRelease); | |
281 | |
282 stackBias = db.lookupIntConstant("STACK_BIAS").intValue(); | |
283 invocationEntryBCI = db.lookupIntConstant("InvocationEntryBci").intValue(); | |
284 invalidOSREntryBCI = db.lookupIntConstant("InvalidOSREntryBci").intValue(); | |
285 | |
286 // We infer the presence of C1 or C2 from a couple of fields we | |
287 // already have present in the type database | |
288 { | |
289 Type type = db.lookupType("methodOopDesc"); | |
290 if (type.getField("_from_compiled_entry", false, false) == null) { | |
291 // Neither C1 nor C2 is present | |
292 usingClientCompiler = false; | |
293 usingServerCompiler = false; | |
294 } else { | |
295 // Determine whether C2 is present | |
296 if (type.getField("_interpreter_invocation_count", false, false) != null) { | |
297 usingServerCompiler = true; | |
298 } else { | |
299 usingClientCompiler = true; | |
300 } | |
301 } | |
302 } | |
303 | |
304 useTLAB = (db.lookupIntConstant("UseTLAB").intValue() != 0); | |
305 | |
306 if (debugger != null) { | |
307 isLP64 = debugger.getMachineDescription().isLP64(); | |
308 } | |
309 bytesPerLong = db.lookupIntConstant("BytesPerLong").intValue(); | |
310 minObjAlignmentInBytes = db.lookupIntConstant("MinObjAlignmentInBytes").intValue(); | |
311 | |
312 intxType = db.lookupType("intx"); | |
313 uintxType = db.lookupType("uintx"); | |
314 boolType = (CIntegerType) db.lookupType("bool"); | |
315 } | |
316 | |
317 /** This could be used by a reflective runtime system */ | |
318 public static void initialize(TypeDataBase db, boolean isBigEndian) { | |
319 if (soleInstance != null) { | |
320 throw new RuntimeException("Attempt to initialize VM twice"); | |
321 } | |
322 soleInstance = new VM(db, null, isBigEndian); | |
323 for (Iterator iter = vmInitializedObservers.iterator(); iter.hasNext(); ) { | |
324 ((Observer) iter.next()).update(null, null); | |
325 } | |
326 } | |
327 | |
328 /** This is used by the debugging system */ | |
329 public static void initialize(TypeDataBase db, JVMDebugger debugger) { | |
330 if (soleInstance != null) { | |
331 throw new RuntimeException("Attempt to initialize VM twice"); | |
332 } | |
333 soleInstance = new VM(db, debugger, debugger.getMachineDescription().isBigEndian()); | |
334 for (Iterator iter = vmInitializedObservers.iterator(); iter.hasNext(); ) { | |
335 ((Observer) iter.next()).update(null, null); | |
336 } | |
337 } | |
338 | |
339 /** This is used by the debugging system */ | |
340 public static void shutdown() { | |
341 soleInstance = null; | |
342 } | |
343 | |
344 /** This is used by both the debugger and any runtime system. It is | |
345 the basic mechanism by which classes which mimic underlying VM | |
346 functionality cause themselves to be initialized. The given | |
347 observer will be notified (with arguments (null, null)) when the | |
348 VM is re-initialized, as well as when it registers itself with | |
349 the VM. */ | |
350 public static void registerVMInitializedObserver(Observer o) { | |
351 vmInitializedObservers.add(o); | |
352 o.update(null, null); | |
353 } | |
354 | |
355 /** This is the primary accessor used by both the debugger and any | |
356 potential runtime system */ | |
357 public static VM getVM() { | |
358 if (soleInstance == null) { | |
359 throw new RuntimeException("VM.initialize() was not yet called"); | |
360 } | |
361 return soleInstance; | |
362 } | |
363 | |
364 /** This is only used by the debugging system. The given observer | |
365 will be notified if the underlying VM resumes execution. NOTE | |
366 that the given observer is not triggered if the VM is currently | |
367 running and therefore differs in behavior from {@link | |
368 #registerVMInitializedObserver} (because of the possibility of | |
369 race conditions if the observer is added while the VM is being | |
370 suspended or resumed). */ | |
371 public void registerVMResumedObserver(Observer o) { | |
372 vmResumedObservers.add(o); | |
373 } | |
374 | |
375 /** This is only used by the debugging system. The given observer | |
376 will be notified if the underlying VM suspends execution. NOTE | |
377 that the given observer is not triggered if the VM is currently | |
378 suspended and therefore differs in behavior from {@link | |
379 #registerVMInitializedObserver} (because of the possibility of | |
380 race conditions if the observer is added while the VM is being | |
381 suspended or resumed). */ | |
382 public void registerVMSuspendedObserver(Observer o) { | |
383 vmSuspendedObservers.add(o); | |
384 } | |
385 | |
386 /** This is only used by the debugging system. Informs all | |
387 registered resumption observers that the VM has been resumed. | |
388 The application is responsible for actually having performed the | |
389 resumption. No OopHandles must be used after this point, as they | |
390 may move in the target address space due to garbage | |
391 collection. */ | |
392 public void fireVMResumed() { | |
393 for (Iterator iter = vmResumedObservers.iterator(); iter.hasNext(); ) { | |
394 ((Observer) iter.next()).update(null, null); | |
395 } | |
396 } | |
397 | |
398 /** This is only used by the debugging system. Informs all | |
399 registered suspension observers that the VM has been suspended. | |
400 The application is responsible for actually having performed the | |
401 suspension. Garbage collection must be forbidden at this point; | |
402 for example, a JPDA-level suspension is not adequate since the | |
403 VM thread may still be running. */ | |
404 public void fireVMSuspended() { | |
405 for (Iterator iter = vmSuspendedObservers.iterator(); iter.hasNext(); ) { | |
406 ((Observer) iter.next()).update(null, null); | |
407 } | |
408 } | |
409 | |
410 /** Returns the OS this VM is running on. Notice that by delegating | |
411 to the debugger we can transparently support remote | |
412 debugging. */ | |
413 public String getOS() { | |
414 if (debugger != null) { | |
415 return debugger.getOS(); | |
416 } | |
417 return PlatformInfo.getOS(); | |
418 } | |
419 | |
420 /** Returns the CPU this VM is running on. Notice that by delegating | |
421 to the debugger we can transparently support remote | |
422 debugging. */ | |
423 public String getCPU() { | |
424 if (debugger != null) { | |
425 return debugger.getCPU(); | |
426 } | |
427 return PlatformInfo.getCPU(); | |
428 } | |
429 | |
430 public Type lookupType(String cTypeName) { | |
431 return db.lookupType(cTypeName); | |
432 } | |
433 | |
434 public Integer lookupIntConstant(String name) { | |
435 return db.lookupIntConstant(name); | |
436 } | |
437 | |
438 public long getAddressSize() { | |
439 return db.getAddressSize(); | |
440 } | |
441 | |
442 public long getOopSize() { | |
443 return db.getOopSize(); | |
444 } | |
445 | |
446 public long getLogAddressSize() { | |
447 return logAddressSize; | |
448 } | |
449 | |
450 /** NOTE: this offset is in BYTES in this system! */ | |
451 public long getStackBias() { | |
452 return stackBias; | |
453 } | |
454 | |
455 /** Indicates whether the underlying machine supports the LP64 data | |
456 model. This is needed for conditionalizing code in a few places */ | |
457 public boolean isLP64() { | |
458 if (Assert.ASSERTS_ENABLED) { | |
459 Assert.that(isDebugging(), "Debugging system only for now"); | |
460 } | |
461 return isLP64; | |
462 } | |
463 | |
464 /** Get bytes-per-long == long/double natural alignment. */ | |
465 public int getBytesPerLong() { | |
466 return bytesPerLong; | |
467 } | |
468 | |
469 /** Get minimum object alignment in bytes. */ | |
470 public int getMinObjAlignmentInBytes() { | |
471 return minObjAlignmentInBytes; | |
472 } | |
473 | |
474 /** Utility routine for getting data structure alignment correct */ | |
475 public long alignUp(long size, long alignment) { | |
476 return (size + alignment - 1) & ~(alignment - 1); | |
477 } | |
478 | |
479 /** Utility routine for getting data structure alignment correct */ | |
480 public long alignDown(long size, long alignment) { | |
481 return size & ~(alignment - 1); | |
482 } | |
483 | |
484 /** Utility routine for building an int from two "unsigned" 16-bit | |
485 shorts */ | |
486 public int buildIntFromShorts(short low, short high) { | |
487 return (((int) high) << 16) | (((int) low) & 0xFFFF); | |
488 } | |
489 | |
490 /** Utility routine for building a long from two "unsigned" 32-bit | |
491 ints in <b>platform-dependent</b> order */ | |
492 public long buildLongFromIntsPD(int oneHalf, int otherHalf) { | |
493 if (isBigEndian) { | |
494 return (((long) otherHalf) << 32) | (((long) oneHalf) & 0x00000000FFFFFFFFL); | |
495 } else{ | |
496 return (((long) oneHalf) << 32) | (((long) otherHalf) & 0x00000000FFFFFFFFL); | |
497 } | |
498 } | |
499 | |
500 /** Indicates whether Thread-Local Allocation Buffers are used */ | |
501 public boolean getUseTLAB() { | |
502 return useTLAB; | |
503 } | |
504 | |
505 public TypeDataBase getTypeDataBase() { | |
506 return db; | |
507 } | |
508 | |
509 public Universe getUniverse() { | |
510 if (universe == null) { | |
511 universe = new Universe(); | |
512 } | |
513 return universe; | |
514 } | |
515 | |
516 public ObjectHeap getObjectHeap() { | |
517 if (heap == null) { | |
518 heap = new ObjectHeap(db); | |
519 } | |
520 return heap; | |
521 } | |
522 | |
523 public SymbolTable getSymbolTable() { | |
524 if (symbols == null) { | |
525 symbols = SymbolTable.getTheTable(); | |
526 } | |
527 return symbols; | |
528 } | |
529 | |
530 public StringTable getStringTable() { | |
531 if (strings == null) { | |
532 strings = StringTable.getTheTable(); | |
533 } | |
534 return strings; | |
535 } | |
536 | |
537 public SystemDictionary getSystemDictionary() { | |
538 if (dict == null) { | |
539 dict = new SystemDictionary(); | |
540 } | |
541 return dict; | |
542 } | |
543 | |
544 public Threads getThreads() { | |
545 if (threads == null) { | |
546 threads = new Threads(); | |
547 } | |
548 return threads; | |
549 } | |
550 | |
551 public ObjectSynchronizer getObjectSynchronizer() { | |
552 if (synchronizer == null) { | |
553 synchronizer = new ObjectSynchronizer(); | |
554 } | |
555 return synchronizer; | |
556 } | |
557 | |
558 public JNIHandles getJNIHandles() { | |
559 if (handles == null) { | |
560 handles = new JNIHandles(); | |
561 } | |
562 return handles; | |
563 } | |
564 | |
565 public Interpreter getInterpreter() { | |
566 if (interpreter == null) { | |
567 interpreter = new Interpreter(); | |
568 } | |
569 return interpreter; | |
570 } | |
571 | |
572 public StubRoutines getStubRoutines() { | |
573 if (stubRoutines == null) { | |
574 stubRoutines = new StubRoutines(); | |
575 } | |
576 return stubRoutines; | |
577 } | |
578 | |
579 public VMRegImpl getVMRegImplInfo() { | |
580 if (vmregImpl == null) { | |
581 vmregImpl = new VMRegImpl(); | |
582 } | |
583 return vmregImpl; | |
584 } | |
585 | |
586 public Bytes getBytes() { | |
587 if (bytes == null) { | |
588 bytes = new Bytes(debugger.getMachineDescription()); | |
589 } | |
590 return bytes; | |
591 } | |
592 | |
593 /** Returns true if this is a "core" build, false if either C1 or C2 | |
594 is present */ | |
595 public boolean isCore() { | |
596 return (!(usingClientCompiler || usingServerCompiler)); | |
597 } | |
598 | |
599 /** Returns true if this is a C1 build, false otherwise */ | |
600 public boolean isClientCompiler() { | |
601 return usingClientCompiler; | |
602 } | |
603 | |
604 /** Returns true if this is a C2 build, false otherwise */ | |
605 public boolean isServerCompiler() { | |
606 return usingServerCompiler; | |
607 } | |
608 | |
609 /** Returns true if C2 derived pointer table should be used, false otherwise */ | |
610 public boolean useDerivedPointerTable() { | |
611 return !disableDerivedPrinterTableCheck; | |
612 } | |
613 | |
614 /** Returns the code cache; should not be used if is core build */ | |
615 public CodeCache getCodeCache() { | |
616 if (Assert.ASSERTS_ENABLED) { | |
617 Assert.that(!isCore(), "noncore builds only"); | |
618 } | |
619 if (codeCache == null) { | |
620 codeCache = new CodeCache(); | |
621 } | |
622 return codeCache; | |
623 } | |
624 | |
625 /** Should only be called for C1 builds */ | |
626 public Runtime1 getRuntime1() { | |
627 if (Assert.ASSERTS_ENABLED) { | |
628 Assert.that(isClientCompiler(), "C1 builds only"); | |
629 } | |
630 if (runtime1 == null) { | |
631 runtime1 = new Runtime1(); | |
632 } | |
633 return runtime1; | |
634 } | |
635 | |
636 /** Test to see whether we're in debugging mode (NOTE: this really | |
637 should not be tested by this code; currently only used in | |
638 StackFrameStream) */ | |
639 public boolean isDebugging() { | |
640 return (debugger != null); | |
641 } | |
642 | |
643 /** This is only used by the debugging (i.e., non-runtime) system */ | |
644 public JVMDebugger getDebugger() { | |
645 if (debugger == null) { | |
646 throw new RuntimeException("Attempt to use debugger in runtime system"); | |
647 } | |
648 return debugger; | |
649 } | |
650 | |
651 /** Indicates whether a given program counter is in Java code. This | |
652 includes but is not spanned by the interpreter and code cache. | |
653 Only used in the debugging system, for implementing | |
654 JavaThread.currentFrameGuess() on x86. */ | |
655 public boolean isJavaPCDbg(Address addr) { | |
656 // FIXME: this is not a complete enough set: must include areas | |
657 // like vtable stubs | |
658 return (getInterpreter().contains(addr) || | |
659 getCodeCache().contains(addr)); | |
660 } | |
661 | |
662 /** FIXME: figure out where to stick this */ | |
663 public int getInvocationEntryBCI() { | |
664 return invocationEntryBCI; | |
665 } | |
666 | |
667 /** FIXME: figure out where to stick this */ | |
668 public int getInvalidOSREntryBCI() { | |
669 return invalidOSREntryBCI; | |
670 } | |
671 | |
672 // FIXME: figure out where to stick this | |
673 public boolean wizardMode() { | |
674 return true; | |
675 } | |
676 | |
677 public ReversePtrs getRevPtrs() { | |
678 return revPtrs; | |
679 } | |
680 | |
681 public void setRevPtrs(ReversePtrs rp) { | |
682 revPtrs = rp; | |
683 } | |
684 | |
685 // returns null, if not available. | |
686 public String getVMRelease() { | |
687 return vmRelease; | |
688 } | |
689 | |
690 // returns null, if not available. | |
691 public String getVMInternalInfo() { | |
692 return vmInternalInfo; | |
693 } | |
694 | |
695 public boolean isSharingEnabled() { | |
696 if (sharingEnabled == null) { | |
697 Flag flag = getCommandLineFlag("UseSharedSpaces"); | |
698 sharingEnabled = (flag == null)? Boolean.FALSE : | |
699 (flag.getBool()? Boolean.TRUE: Boolean.FALSE); | |
700 } | |
701 return sharingEnabled.booleanValue(); | |
702 } | |
703 | |
704 | |
705 // returns null, if not available. | |
706 public Flag[] getCommandLineFlags() { | |
707 if (commandLineFlags == null) { | |
708 readCommandLineFlags(); | |
709 } | |
710 | |
711 return commandLineFlags; | |
712 } | |
713 | |
714 public Flag getCommandLineFlag(String name) { | |
715 if (flagsMap == null) { | |
716 flagsMap = new HashMap(); | |
717 Flag[] flags = getCommandLineFlags(); | |
718 for (int i = 0; i < flags.length; i++) { | |
719 flagsMap.put(flags[i].getName(), flags[i]); | |
720 } | |
721 } | |
722 return (Flag) flagsMap.get(name); | |
723 } | |
724 | |
725 private void readCommandLineFlags() { | |
726 // get command line flags | |
727 TypeDataBase db = getTypeDataBase(); | |
728 try { | |
729 Type flagType = db.lookupType("Flag"); | |
730 int numFlags = (int) flagType.getCIntegerField("numFlags").getValue(); | |
731 // NOTE: last flag contains null values. | |
732 commandLineFlags = new Flag[numFlags - 1]; | |
733 | |
734 Address flagAddr = flagType.getAddressField("flags").getValue(); | |
735 | |
736 AddressField typeFld = flagType.getAddressField("type"); | |
737 AddressField nameFld = flagType.getAddressField("name"); | |
738 AddressField addrFld = flagType.getAddressField("addr"); | |
739 AddressField kindFld = flagType.getAddressField("kind"); | |
740 | |
741 long flagSize = flagType.getSize(); // sizeof(Flag) | |
742 | |
743 // NOTE: last flag contains null values. | |
744 for (int f = 0; f < numFlags - 1; f++) { | |
745 String type = CStringUtilities.getString(typeFld.getValue(flagAddr)); | |
746 String name = CStringUtilities.getString(nameFld.getValue(flagAddr)); | |
747 Address addr = addrFld.getValue(flagAddr); | |
748 String kind = CStringUtilities.getString(kindFld.getValue(flagAddr)); | |
749 commandLineFlags[f] = new Flag(type, name, addr, kind); | |
750 flagAddr = flagAddr.addOffsetTo(flagSize); | |
751 } | |
752 | |
753 // sort flags by name | |
754 Arrays.sort(commandLineFlags, new Comparator() { | |
755 public int compare(Object o1, Object o2) { | |
756 Flag f1 = (Flag) o1; | |
757 Flag f2 = (Flag) o2; | |
758 return f1.getName().compareTo(f2.getName()); | |
759 } | |
760 }); | |
761 } catch (Exception exp) { | |
762 // ignore. may be older version. command line flags not available. | |
763 } | |
764 } | |
765 | |
766 public String getSystemProperty(String key) { | |
767 Properties props = getSystemProperties(); | |
768 return (props != null)? props.getProperty(key) : null; | |
769 } | |
770 | |
771 public Properties getSystemProperties() { | |
772 if (sysProps == null) { | |
773 readSystemProperties(); | |
774 } | |
775 return sysProps; | |
776 } | |
777 | |
778 private void readSystemProperties() { | |
779 InstanceKlass systemKls = getSystemDictionary().getSystemKlass(); | |
780 systemKls.iterate(new DefaultOopVisitor() { | |
781 ObjectReader objReader = new ObjectReader(); | |
782 public void doOop(sun.jvm.hotspot.oops.OopField field, boolean isVMField) { | |
783 if (field.getID().getName().equals("props")) { | |
784 try { | |
785 sysProps = (Properties) objReader.readObject(field.getValue(getObj())); | |
786 } catch (Exception e) { | |
787 if (Assert.ASSERTS_ENABLED) { | |
788 e.printStackTrace(); | |
789 } | |
790 } | |
791 } | |
792 } | |
793 }, false); | |
794 } | |
795 } |