Mercurial > hg > graal-jvmci-8
annotate agent/src/share/classes/sun/jvm/hotspot/runtime/VM.java @ 6266:1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
6984705: JSR 292 method handle creation should not go through JNI
Summary: remove assembly code for JDK 7 chained method handles
Reviewed-by: jrose, twisti, kvn, mhaupt
Contributed-by: John Rose <john.r.rose@oracle.com>, Christian Thalinger <christian.thalinger@oracle.com>, Michael Haupt <michael.haupt@oracle.com>
author | twisti |
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date | Tue, 24 Jul 2012 10:51:00 -0700 |
parents | 35c656d0b685 |
children | a9fed06c01d2 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2000, 2011, 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.*; | |
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33 import sun.jvm.hotspot.code.*; |
0 | 34 import sun.jvm.hotspot.debugger.*; |
35 import sun.jvm.hotspot.interpreter.*; | |
36 import sun.jvm.hotspot.memory.*; | |
37 import sun.jvm.hotspot.oops.*; | |
38 import sun.jvm.hotspot.types.*; | |
39 import sun.jvm.hotspot.utilities.*; | |
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40 import sun.jvm.hotspot.runtime.*; |
0 | 41 |
42 /** <P> This class encapsulates the global state of the VM; the | |
43 universe, object heap, interpreter, etc. It is a Singleton and | |
44 must be initialized with a call to initialize() before calling | |
45 getVM(). </P> | |
46 | |
47 <P> Many auxiliary classes (i.e., most of the VMObjects) keep | |
48 needed field offsets in the form of static Field objects. In a | |
49 debugging system, the VM might be shutdown and re-initialized (on | |
50 a differently-configured build, i.e., 32- vs. 64-bit), and all old | |
51 cached state (including fields and field offsets) must be | |
52 flushed. </P> | |
53 | |
54 <P> An Observer pattern is used to implement the initialization of | |
55 such classes. Each such class, in its static initializer, | |
56 registers an Observer with the VM class via | |
57 VM.registerVMInitializedObserver(). This Observer is guaranteed to | |
58 be notified whenever the VM is initialized (or re-initialized). To | |
59 implement the first-time initialization, the observer is also | |
60 notified when it registers itself with the VM. (For bootstrapping | |
61 reasons, this implies that the constructor of VM can not | |
62 instantiate any such objects, since VM.soleInstance will not have | |
63 been set yet. This is a bootstrapping issue which may have to be | |
64 revisited later.) </P> | |
65 */ | |
66 | |
67 public class VM { | |
68 private static VM soleInstance; | |
69 private static List vmInitializedObservers = new ArrayList(); | |
70 private List vmResumedObservers = new ArrayList(); | |
71 private List vmSuspendedObservers = new ArrayList(); | |
72 private TypeDataBase db; | |
73 private boolean isBigEndian; | |
74 /** This is only present if in a debugging system */ | |
75 private JVMDebugger debugger; | |
76 private long stackBias; | |
77 private long logAddressSize; | |
78 private Universe universe; | |
79 private ObjectHeap heap; | |
80 private SymbolTable symbols; | |
81 private StringTable strings; | |
82 private SystemDictionary dict; | |
83 private Threads threads; | |
84 private ObjectSynchronizer synchronizer; | |
85 private JNIHandles handles; | |
86 private Interpreter interpreter; | |
87 private StubRoutines stubRoutines; | |
88 private Bytes bytes; | |
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89 |
0 | 90 /** Flags indicating whether we are attached to a core, C1, or C2 build */ |
91 private boolean usingClientCompiler; | |
92 private boolean usingServerCompiler; | |
93 /** Flag indicating whether UseTLAB is turned on */ | |
94 private boolean useTLAB; | |
95 /** alignment constants */ | |
96 private boolean isLP64; | |
97 private int bytesPerLong; | |
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98 private int objectAlignmentInBytes; |
0 | 99 private int minObjAlignmentInBytes; |
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100 private int logMinObjAlignmentInBytes; |
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101 private int heapWordSize; |
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102 private int heapOopSize; |
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103 private int oopSize; |
0 | 104 /** This is only present in a non-core build */ |
105 private CodeCache codeCache; | |
106 /** This is only present in a C1 build */ | |
107 private Runtime1 runtime1; | |
108 /** These constants come from globalDefinitions.hpp */ | |
109 private int invocationEntryBCI; | |
110 private int invalidOSREntryBCI; | |
111 private ReversePtrs revPtrs; | |
112 private VMRegImpl vmregImpl; | |
113 | |
114 // System.getProperties from debuggee VM | |
115 private Properties sysProps; | |
116 | |
117 // VM version strings come from Abstract_VM_Version class | |
118 private String vmRelease; | |
119 private String vmInternalInfo; | |
120 | |
121 private Flag[] commandLineFlags; | |
122 private Map flagsMap; | |
123 | |
124 private static Type intxType; | |
125 private static Type uintxType; | |
126 private static CIntegerType boolType; | |
127 private Boolean sharingEnabled; | |
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128 private Boolean compressedOopsEnabled; |
0 | 129 |
130 // command line flags supplied to VM - see struct Flag in globals.hpp | |
131 public static final class Flag { | |
132 private String type; | |
133 private String name; | |
134 private Address addr; | |
135 private String kind; | |
3939 | 136 private int origin; |
0 | 137 |
3939 | 138 private Flag(String type, String name, Address addr, String kind, int origin) { |
0 | 139 this.type = type; |
140 this.name = name; | |
141 this.addr = addr; | |
142 this.kind = kind; | |
3939 | 143 this.origin = origin; |
0 | 144 } |
145 | |
146 public String getType() { | |
147 return type; | |
148 } | |
149 | |
150 public String getName() { | |
151 return name; | |
152 } | |
153 | |
154 public Address getAddress() { | |
155 return addr; | |
156 } | |
157 | |
158 public String getKind() { | |
159 return kind; | |
160 } | |
161 | |
3939 | 162 public int getOrigin() { |
163 return origin; | |
164 } | |
165 | |
0 | 166 public boolean isBool() { |
167 return type.equals("bool"); | |
168 } | |
169 | |
170 public boolean getBool() { | |
171 if (Assert.ASSERTS_ENABLED) { | |
172 Assert.that(isBool(), "not a bool flag!"); | |
173 } | |
174 return addr.getCIntegerAt(0, boolType.getSize(), boolType.isUnsigned()) | |
175 != 0; | |
176 } | |
177 | |
178 public boolean isIntx() { | |
179 return type.equals("intx"); | |
180 } | |
181 | |
182 public long getIntx() { | |
183 if (Assert.ASSERTS_ENABLED) { | |
184 Assert.that(isIntx(), "not a intx flag!"); | |
185 } | |
186 return addr.getCIntegerAt(0, intxType.getSize(), false); | |
187 } | |
188 | |
189 public boolean isUIntx() { | |
190 return type.equals("uintx"); | |
191 } | |
192 | |
193 public long getUIntx() { | |
194 if (Assert.ASSERTS_ENABLED) { | |
195 Assert.that(isUIntx(), "not a uintx flag!"); | |
196 } | |
197 return addr.getCIntegerAt(0, uintxType.getSize(), true); | |
198 } | |
199 | |
200 public String getValue() { | |
201 if (isBool()) { | |
202 return new Boolean(getBool()).toString(); | |
203 } else if (isIntx()) { | |
204 return new Long(getIntx()).toString(); | |
205 } else if (isUIntx()) { | |
206 return new Long(getUIntx()).toString(); | |
207 } else { | |
208 return null; | |
209 } | |
210 } | |
211 }; | |
212 | |
213 private static void checkVMVersion(String vmRelease) { | |
214 if (System.getProperty("sun.jvm.hotspot.runtime.VM.disableVersionCheck") == null) { | |
215 // read sa build version. | |
216 String versionProp = "sun.jvm.hotspot.runtime.VM.saBuildVersion"; | |
217 String saVersion = saProps.getProperty(versionProp); | |
218 if (saVersion == null) | |
219 throw new RuntimeException("Missing property " + versionProp); | |
220 | |
221 // Strip nonproduct VM version substring (note: saVersion doesn't have it). | |
222 String vmVersion = vmRelease.replaceAll("(-fastdebug)|(-debug)|(-jvmg)|(-optimized)|(-profiled)",""); | |
223 | |
224 if (saVersion.equals(vmVersion)) { | |
225 // Exact match | |
226 return; | |
227 } | |
228 if (saVersion.indexOf('-') == saVersion.lastIndexOf('-') && | |
229 vmVersion.indexOf('-') == vmVersion.lastIndexOf('-')) { | |
230 // Throw exception if different release versions: | |
231 // <major>.<minor>-b<n> | |
232 throw new VMVersionMismatchException(saVersion, vmRelease); | |
233 } else { | |
234 // Otherwise print warning to allow mismatch not release versions | |
235 // during development. | |
236 System.err.println("WARNING: Hotspot VM version " + vmRelease + | |
237 " does not match with SA version " + saVersion + | |
238 "." + " You may see unexpected results. "); | |
239 } | |
240 } else { | |
241 System.err.println("WARNING: You have disabled SA and VM version check. You may be " + | |
242 "using incompatible version of SA and you may see unexpected " + | |
243 "results."); | |
244 } | |
245 } | |
246 | |
247 private static final boolean disableDerivedPrinterTableCheck; | |
248 private static final Properties saProps; | |
249 | |
250 static { | |
251 saProps = new Properties(); | |
252 URL url = null; | |
253 try { | |
254 url = VM.class.getClassLoader().getResource("sa.properties"); | |
255 saProps.load(new BufferedInputStream(url.openStream())); | |
256 } catch (Exception e) { | |
257 throw new RuntimeException("Unable to load properties " + | |
258 (url == null ? "null" : url.toString()) + | |
259 ": " + e.getMessage()); | |
260 } | |
261 | |
262 disableDerivedPrinterTableCheck = System.getProperty("sun.jvm.hotspot.runtime.VM.disableDerivedPointerTableCheck") != null; | |
263 } | |
264 | |
265 private VM(TypeDataBase db, JVMDebugger debugger, boolean isBigEndian) { | |
266 this.db = db; | |
267 this.debugger = debugger; | |
268 this.isBigEndian = isBigEndian; | |
269 | |
270 // Note that we don't construct universe, heap, threads, | |
271 // interpreter, or stubRoutines here (any more). The current | |
272 // initialization mechanisms require that the VM be completely set | |
273 // up (i.e., out of its constructor, with soleInstance assigned) | |
274 // before their static initializers are run. | |
275 | |
276 if (db.getAddressSize() == 4) { | |
277 logAddressSize = 2; | |
278 } else if (db.getAddressSize() == 8) { | |
279 logAddressSize = 3; | |
280 } else { | |
281 throw new RuntimeException("Address size " + db.getAddressSize() + " not yet supported"); | |
282 } | |
283 | |
284 // read VM version info | |
285 try { | |
286 Type vmVersion = db.lookupType("Abstract_VM_Version"); | |
287 Address releaseAddr = vmVersion.getAddressField("_s_vm_release").getValue(); | |
288 vmRelease = CStringUtilities.getString(releaseAddr); | |
289 Address vmInternalInfoAddr = vmVersion.getAddressField("_s_internal_vm_info_string").getValue(); | |
290 vmInternalInfo = CStringUtilities.getString(vmInternalInfoAddr); | |
291 } catch (Exception exp) { | |
292 throw new RuntimeException("can't determine target's VM version : " + exp.getMessage()); | |
293 } | |
294 | |
295 checkVMVersion(vmRelease); | |
296 | |
297 stackBias = db.lookupIntConstant("STACK_BIAS").intValue(); | |
298 invocationEntryBCI = db.lookupIntConstant("InvocationEntryBci").intValue(); | |
299 invalidOSREntryBCI = db.lookupIntConstant("InvalidOSREntryBci").intValue(); | |
300 | |
301 // We infer the presence of C1 or C2 from a couple of fields we | |
302 // already have present in the type database | |
303 { | |
304 Type type = db.lookupType("methodOopDesc"); | |
305 if (type.getField("_from_compiled_entry", false, false) == null) { | |
306 // Neither C1 nor C2 is present | |
307 usingClientCompiler = false; | |
308 usingServerCompiler = false; | |
309 } else { | |
310 // Determine whether C2 is present | |
3944 | 311 if (db.lookupType("Matcher", false) != null) { |
0 | 312 usingServerCompiler = true; |
313 } else { | |
314 usingClientCompiler = true; | |
315 } | |
316 } | |
317 } | |
318 | |
319 useTLAB = (db.lookupIntConstant("UseTLAB").intValue() != 0); | |
320 | |
321 if (debugger != null) { | |
322 isLP64 = debugger.getMachineDescription().isLP64(); | |
323 } | |
324 bytesPerLong = db.lookupIntConstant("BytesPerLong").intValue(); | |
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325 heapWordSize = db.lookupIntConstant("HeapWordSize").intValue(); |
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326 oopSize = db.lookupIntConstant("oopSize").intValue(); |
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327 |
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328 intxType = db.lookupType("intx"); |
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329 uintxType = db.lookupType("uintx"); |
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330 boolType = (CIntegerType) db.lookupType("bool"); |
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331 |
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332 minObjAlignmentInBytes = getObjectAlignmentInBytes(); |
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333 if (minObjAlignmentInBytes == 8) { |
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334 logMinObjAlignmentInBytes = 3; |
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335 } else if (minObjAlignmentInBytes == 16) { |
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336 logMinObjAlignmentInBytes = 4; |
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337 } else { |
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338 throw new RuntimeException("Object alignment " + minObjAlignmentInBytes + " not yet supported"); |
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339 } |
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340 |
749 | 341 if (isCompressedOopsEnabled()) { |
342 // Size info for oops within java objects is fixed | |
343 heapOopSize = (int)getIntSize(); | |
344 } else { | |
345 heapOopSize = (int)getOopSize(); | |
346 } | |
0 | 347 } |
348 | |
349 /** This could be used by a reflective runtime system */ | |
350 public static void initialize(TypeDataBase db, boolean isBigEndian) { | |
351 if (soleInstance != null) { | |
352 throw new RuntimeException("Attempt to initialize VM twice"); | |
353 } | |
354 soleInstance = new VM(db, null, isBigEndian); | |
355 for (Iterator iter = vmInitializedObservers.iterator(); iter.hasNext(); ) { | |
356 ((Observer) iter.next()).update(null, null); | |
357 } | |
358 } | |
359 | |
360 /** This is used by the debugging system */ | |
361 public static void initialize(TypeDataBase db, JVMDebugger debugger) { | |
362 if (soleInstance != null) { | |
363 throw new RuntimeException("Attempt to initialize VM twice"); | |
364 } | |
365 soleInstance = new VM(db, debugger, debugger.getMachineDescription().isBigEndian()); | |
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366 |
0 | 367 for (Iterator iter = vmInitializedObservers.iterator(); iter.hasNext(); ) { |
368 ((Observer) iter.next()).update(null, null); | |
369 } | |
650 | 370 |
749 | 371 debugger.putHeapConst(soleInstance.getHeapOopSize(), Universe.getNarrowOopBase(), |
372 Universe.getNarrowOopShift()); | |
0 | 373 } |
374 | |
375 /** This is used by the debugging system */ | |
376 public static void shutdown() { | |
377 soleInstance = null; | |
378 } | |
379 | |
380 /** This is used by both the debugger and any runtime system. It is | |
381 the basic mechanism by which classes which mimic underlying VM | |
382 functionality cause themselves to be initialized. The given | |
383 observer will be notified (with arguments (null, null)) when the | |
384 VM is re-initialized, as well as when it registers itself with | |
385 the VM. */ | |
386 public static void registerVMInitializedObserver(Observer o) { | |
387 vmInitializedObservers.add(o); | |
388 o.update(null, null); | |
389 } | |
390 | |
391 /** This is the primary accessor used by both the debugger and any | |
392 potential runtime system */ | |
393 public static VM getVM() { | |
394 if (soleInstance == null) { | |
395 throw new RuntimeException("VM.initialize() was not yet called"); | |
396 } | |
397 return soleInstance; | |
398 } | |
399 | |
400 /** This is only used by the debugging system. The given observer | |
401 will be notified if the underlying VM resumes execution. NOTE | |
402 that the given observer is not triggered if the VM is currently | |
403 running and therefore differs in behavior from {@link | |
404 #registerVMInitializedObserver} (because of the possibility of | |
405 race conditions if the observer is added while the VM is being | |
406 suspended or resumed). */ | |
407 public void registerVMResumedObserver(Observer o) { | |
408 vmResumedObservers.add(o); | |
409 } | |
410 | |
411 /** This is only used by the debugging system. The given observer | |
412 will be notified if the underlying VM suspends execution. NOTE | |
413 that the given observer is not triggered if the VM is currently | |
414 suspended and therefore differs in behavior from {@link | |
415 #registerVMInitializedObserver} (because of the possibility of | |
416 race conditions if the observer is added while the VM is being | |
417 suspended or resumed). */ | |
418 public void registerVMSuspendedObserver(Observer o) { | |
419 vmSuspendedObservers.add(o); | |
420 } | |
421 | |
422 /** This is only used by the debugging system. Informs all | |
423 registered resumption observers that the VM has been resumed. | |
424 The application is responsible for actually having performed the | |
425 resumption. No OopHandles must be used after this point, as they | |
426 may move in the target address space due to garbage | |
427 collection. */ | |
428 public void fireVMResumed() { | |
429 for (Iterator iter = vmResumedObservers.iterator(); iter.hasNext(); ) { | |
430 ((Observer) iter.next()).update(null, null); | |
431 } | |
432 } | |
433 | |
434 /** This is only used by the debugging system. Informs all | |
435 registered suspension observers that the VM has been suspended. | |
436 The application is responsible for actually having performed the | |
437 suspension. Garbage collection must be forbidden at this point; | |
438 for example, a JPDA-level suspension is not adequate since the | |
439 VM thread may still be running. */ | |
440 public void fireVMSuspended() { | |
441 for (Iterator iter = vmSuspendedObservers.iterator(); iter.hasNext(); ) { | |
442 ((Observer) iter.next()).update(null, null); | |
443 } | |
444 } | |
445 | |
446 /** Returns the OS this VM is running on. Notice that by delegating | |
447 to the debugger we can transparently support remote | |
448 debugging. */ | |
449 public String getOS() { | |
450 if (debugger != null) { | |
451 return debugger.getOS(); | |
452 } | |
453 return PlatformInfo.getOS(); | |
454 } | |
455 | |
456 /** Returns the CPU this VM is running on. Notice that by delegating | |
457 to the debugger we can transparently support remote | |
458 debugging. */ | |
459 public String getCPU() { | |
460 if (debugger != null) { | |
461 return debugger.getCPU(); | |
462 } | |
463 return PlatformInfo.getCPU(); | |
464 } | |
465 | |
466 public Type lookupType(String cTypeName) { | |
467 return db.lookupType(cTypeName); | |
468 } | |
469 | |
470 public Integer lookupIntConstant(String name) { | |
471 return db.lookupIntConstant(name); | |
472 } | |
473 | |
474 public long getAddressSize() { | |
475 return db.getAddressSize(); | |
476 } | |
477 | |
478 public long getOopSize() { | |
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479 return oopSize; |
0 | 480 } |
481 | |
482 public long getLogAddressSize() { | |
483 return logAddressSize; | |
484 } | |
485 | |
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486 public long getIntSize() { |
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487 return db.getJIntType().getSize(); |
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488 } |
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489 |
0 | 490 /** NOTE: this offset is in BYTES in this system! */ |
491 public long getStackBias() { | |
492 return stackBias; | |
493 } | |
494 | |
495 /** Indicates whether the underlying machine supports the LP64 data | |
496 model. This is needed for conditionalizing code in a few places */ | |
497 public boolean isLP64() { | |
498 if (Assert.ASSERTS_ENABLED) { | |
499 Assert.that(isDebugging(), "Debugging system only for now"); | |
500 } | |
501 return isLP64; | |
502 } | |
503 | |
504 /** Get bytes-per-long == long/double natural alignment. */ | |
505 public int getBytesPerLong() { | |
506 return bytesPerLong; | |
507 } | |
508 | |
509 /** Get minimum object alignment in bytes. */ | |
510 public int getMinObjAlignmentInBytes() { | |
511 return minObjAlignmentInBytes; | |
512 } | |
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513 public int getLogMinObjAlignmentInBytes() { |
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514 return logMinObjAlignmentInBytes; |
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515 } |
0 | 516 |
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517 public int getHeapWordSize() { |
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518 return heapWordSize; |
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519 } |
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520 |
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521 public int getHeapOopSize() { |
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522 return heapOopSize; |
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523 } |
0 | 524 /** Utility routine for getting data structure alignment correct */ |
525 public long alignUp(long size, long alignment) { | |
526 return (size + alignment - 1) & ~(alignment - 1); | |
527 } | |
528 | |
529 /** Utility routine for getting data structure alignment correct */ | |
530 public long alignDown(long size, long alignment) { | |
531 return size & ~(alignment - 1); | |
532 } | |
533 | |
534 /** Utility routine for building an int from two "unsigned" 16-bit | |
535 shorts */ | |
536 public int buildIntFromShorts(short low, short high) { | |
537 return (((int) high) << 16) | (((int) low) & 0xFFFF); | |
538 } | |
539 | |
540 /** Utility routine for building a long from two "unsigned" 32-bit | |
541 ints in <b>platform-dependent</b> order */ | |
542 public long buildLongFromIntsPD(int oneHalf, int otherHalf) { | |
543 if (isBigEndian) { | |
544 return (((long) otherHalf) << 32) | (((long) oneHalf) & 0x00000000FFFFFFFFL); | |
545 } else{ | |
546 return (((long) oneHalf) << 32) | (((long) otherHalf) & 0x00000000FFFFFFFFL); | |
547 } | |
548 } | |
549 | |
550 /** Indicates whether Thread-Local Allocation Buffers are used */ | |
551 public boolean getUseTLAB() { | |
552 return useTLAB; | |
553 } | |
554 | |
555 public TypeDataBase getTypeDataBase() { | |
556 return db; | |
557 } | |
558 | |
559 public Universe getUniverse() { | |
560 if (universe == null) { | |
561 universe = new Universe(); | |
562 } | |
563 return universe; | |
564 } | |
565 | |
566 public ObjectHeap getObjectHeap() { | |
567 if (heap == null) { | |
568 heap = new ObjectHeap(db); | |
569 } | |
570 return heap; | |
571 } | |
572 | |
573 public SymbolTable getSymbolTable() { | |
574 if (symbols == null) { | |
575 symbols = SymbolTable.getTheTable(); | |
576 } | |
577 return symbols; | |
578 } | |
579 | |
580 public StringTable getStringTable() { | |
581 if (strings == null) { | |
582 strings = StringTable.getTheTable(); | |
583 } | |
584 return strings; | |
585 } | |
586 | |
587 public SystemDictionary getSystemDictionary() { | |
588 if (dict == null) { | |
589 dict = new SystemDictionary(); | |
590 } | |
591 return dict; | |
592 } | |
593 | |
594 public Threads getThreads() { | |
595 if (threads == null) { | |
596 threads = new Threads(); | |
597 } | |
598 return threads; | |
599 } | |
600 | |
601 public ObjectSynchronizer getObjectSynchronizer() { | |
602 if (synchronizer == null) { | |
603 synchronizer = new ObjectSynchronizer(); | |
604 } | |
605 return synchronizer; | |
606 } | |
607 | |
608 public JNIHandles getJNIHandles() { | |
609 if (handles == null) { | |
610 handles = new JNIHandles(); | |
611 } | |
612 return handles; | |
613 } | |
614 | |
615 public Interpreter getInterpreter() { | |
616 if (interpreter == null) { | |
617 interpreter = new Interpreter(); | |
618 } | |
619 return interpreter; | |
620 } | |
621 | |
622 public StubRoutines getStubRoutines() { | |
623 if (stubRoutines == null) { | |
624 stubRoutines = new StubRoutines(); | |
625 } | |
626 return stubRoutines; | |
627 } | |
628 | |
629 public VMRegImpl getVMRegImplInfo() { | |
630 if (vmregImpl == null) { | |
631 vmregImpl = new VMRegImpl(); | |
632 } | |
633 return vmregImpl; | |
634 } | |
635 | |
636 public Bytes getBytes() { | |
637 if (bytes == null) { | |
638 bytes = new Bytes(debugger.getMachineDescription()); | |
639 } | |
640 return bytes; | |
641 } | |
642 | |
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643 /** Returns true if this is a isBigEndian, false otherwise */ |
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644 public boolean isBigEndian() { |
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645 return isBigEndian; |
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646 } |
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647 |
0 | 648 /** Returns true if this is a "core" build, false if either C1 or C2 |
649 is present */ | |
650 public boolean isCore() { | |
651 return (!(usingClientCompiler || usingServerCompiler)); | |
652 } | |
653 | |
654 /** Returns true if this is a C1 build, false otherwise */ | |
655 public boolean isClientCompiler() { | |
656 return usingClientCompiler; | |
657 } | |
658 | |
659 /** Returns true if this is a C2 build, false otherwise */ | |
660 public boolean isServerCompiler() { | |
661 return usingServerCompiler; | |
662 } | |
663 | |
664 /** Returns true if C2 derived pointer table should be used, false otherwise */ | |
665 public boolean useDerivedPointerTable() { | |
666 return !disableDerivedPrinterTableCheck; | |
667 } | |
668 | |
669 /** Returns the code cache; should not be used if is core build */ | |
670 public CodeCache getCodeCache() { | |
671 if (Assert.ASSERTS_ENABLED) { | |
672 Assert.that(!isCore(), "noncore builds only"); | |
673 } | |
674 if (codeCache == null) { | |
675 codeCache = new CodeCache(); | |
676 } | |
677 return codeCache; | |
678 } | |
679 | |
680 /** Should only be called for C1 builds */ | |
681 public Runtime1 getRuntime1() { | |
682 if (Assert.ASSERTS_ENABLED) { | |
683 Assert.that(isClientCompiler(), "C1 builds only"); | |
684 } | |
685 if (runtime1 == null) { | |
686 runtime1 = new Runtime1(); | |
687 } | |
688 return runtime1; | |
689 } | |
690 | |
691 /** Test to see whether we're in debugging mode (NOTE: this really | |
692 should not be tested by this code; currently only used in | |
693 StackFrameStream) */ | |
694 public boolean isDebugging() { | |
695 return (debugger != null); | |
696 } | |
697 | |
698 /** This is only used by the debugging (i.e., non-runtime) system */ | |
699 public JVMDebugger getDebugger() { | |
700 if (debugger == null) { | |
701 throw new RuntimeException("Attempt to use debugger in runtime system"); | |
702 } | |
703 return debugger; | |
704 } | |
705 | |
706 /** Indicates whether a given program counter is in Java code. This | |
707 includes but is not spanned by the interpreter and code cache. | |
708 Only used in the debugging system, for implementing | |
709 JavaThread.currentFrameGuess() on x86. */ | |
710 public boolean isJavaPCDbg(Address addr) { | |
711 // FIXME: this is not a complete enough set: must include areas | |
712 // like vtable stubs | |
713 return (getInterpreter().contains(addr) || | |
714 getCodeCache().contains(addr)); | |
715 } | |
716 | |
717 /** FIXME: figure out where to stick this */ | |
718 public int getInvocationEntryBCI() { | |
719 return invocationEntryBCI; | |
720 } | |
721 | |
722 /** FIXME: figure out where to stick this */ | |
723 public int getInvalidOSREntryBCI() { | |
724 return invalidOSREntryBCI; | |
725 } | |
726 | |
727 // FIXME: figure out where to stick this | |
728 public boolean wizardMode() { | |
729 return true; | |
730 } | |
731 | |
732 public ReversePtrs getRevPtrs() { | |
733 return revPtrs; | |
734 } | |
735 | |
736 public void setRevPtrs(ReversePtrs rp) { | |
737 revPtrs = rp; | |
738 } | |
739 | |
740 // returns null, if not available. | |
741 public String getVMRelease() { | |
742 return vmRelease; | |
743 } | |
744 | |
745 // returns null, if not available. | |
746 public String getVMInternalInfo() { | |
747 return vmInternalInfo; | |
748 } | |
749 | |
750 public boolean isSharingEnabled() { | |
751 if (sharingEnabled == null) { | |
752 Flag flag = getCommandLineFlag("UseSharedSpaces"); | |
753 sharingEnabled = (flag == null)? Boolean.FALSE : | |
754 (flag.getBool()? Boolean.TRUE: Boolean.FALSE); | |
755 } | |
756 return sharingEnabled.booleanValue(); | |
757 } | |
758 | |
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759 public boolean isCompressedOopsEnabled() { |
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760 if (compressedOopsEnabled == null) { |
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761 Flag flag = getCommandLineFlag("UseCompressedOops"); |
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762 compressedOopsEnabled = (flag == null) ? Boolean.FALSE: |
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763 (flag.getBool()? Boolean.TRUE: Boolean.FALSE); |
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764 } |
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765 return compressedOopsEnabled.booleanValue(); |
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766 } |
0 | 767 |
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768 public int getObjectAlignmentInBytes() { |
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769 if (objectAlignmentInBytes == 0) { |
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770 Flag flag = getCommandLineFlag("ObjectAlignmentInBytes"); |
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771 objectAlignmentInBytes = (flag == null) ? 8 : (int)flag.getIntx(); |
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772 } |
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773 return objectAlignmentInBytes; |
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774 } |
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775 |
0 | 776 // returns null, if not available. |
777 public Flag[] getCommandLineFlags() { | |
778 if (commandLineFlags == null) { | |
779 readCommandLineFlags(); | |
780 } | |
781 | |
782 return commandLineFlags; | |
783 } | |
784 | |
785 public Flag getCommandLineFlag(String name) { | |
786 if (flagsMap == null) { | |
787 flagsMap = new HashMap(); | |
788 Flag[] flags = getCommandLineFlags(); | |
789 for (int i = 0; i < flags.length; i++) { | |
790 flagsMap.put(flags[i].getName(), flags[i]); | |
791 } | |
792 } | |
793 return (Flag) flagsMap.get(name); | |
794 } | |
795 | |
796 private void readCommandLineFlags() { | |
797 // get command line flags | |
798 TypeDataBase db = getTypeDataBase(); | |
3939 | 799 Type flagType = db.lookupType("Flag"); |
800 int numFlags = (int) flagType.getCIntegerField("numFlags").getValue(); | |
801 // NOTE: last flag contains null values. | |
802 commandLineFlags = new Flag[numFlags - 1]; | |
803 | |
804 Address flagAddr = flagType.getAddressField("flags").getValue(); | |
0 | 805 |
3939 | 806 AddressField typeFld = flagType.getAddressField("type"); |
807 AddressField nameFld = flagType.getAddressField("name"); | |
808 AddressField addrFld = flagType.getAddressField("addr"); | |
809 AddressField kindFld = flagType.getAddressField("kind"); | |
810 CIntField originFld = new CIntField(flagType.getCIntegerField("origin"), 0); | |
0 | 811 |
3939 | 812 long flagSize = flagType.getSize(); // sizeof(Flag) |
0 | 813 |
3939 | 814 // NOTE: last flag contains null values. |
815 for (int f = 0; f < numFlags - 1; f++) { | |
816 String type = CStringUtilities.getString(typeFld.getValue(flagAddr)); | |
817 String name = CStringUtilities.getString(nameFld.getValue(flagAddr)); | |
818 Address addr = addrFld.getValue(flagAddr); | |
819 String kind = CStringUtilities.getString(kindFld.getValue(flagAddr)); | |
820 int origin = (int)originFld.getValue(flagAddr); | |
821 commandLineFlags[f] = new Flag(type, name, addr, kind, origin); | |
822 flagAddr = flagAddr.addOffsetTo(flagSize); | |
823 } | |
0 | 824 |
3939 | 825 // sort flags by name |
826 Arrays.sort(commandLineFlags, new Comparator() { | |
827 public int compare(Object o1, Object o2) { | |
828 Flag f1 = (Flag) o1; | |
829 Flag f2 = (Flag) o2; | |
830 return f1.getName().compareTo(f2.getName()); | |
831 } | |
832 }); | |
0 | 833 } |
834 | |
835 public String getSystemProperty(String key) { | |
836 Properties props = getSystemProperties(); | |
837 return (props != null)? props.getProperty(key) : null; | |
838 } | |
839 | |
840 public Properties getSystemProperties() { | |
841 if (sysProps == null) { | |
842 readSystemProperties(); | |
843 } | |
844 return sysProps; | |
845 } | |
846 | |
847 private void readSystemProperties() { | |
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848 final InstanceKlass systemKls = getSystemDictionary().getSystemKlass(); |
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849 systemKls.iterateStaticFields(new DefaultOopVisitor() { |
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850 ObjectReader objReader = new ObjectReader(); |
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851 public void doOop(sun.jvm.hotspot.oops.OopField field, boolean isVMField) { |
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852 if (field.getID().getName().equals("props")) { |
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853 try { |
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854 sysProps = (Properties) objReader.readObject(field.getValue(getObj())); |
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855 } catch (Exception e) { |
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856 e.printStackTrace(); |
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857 } |
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858 } |
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859 } |
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860 }); |
0 | 861 } |
862 } |