Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/runtime/VM.java @ 2376:c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
Reviewed-by: kvn, coleenp, twisti, stefank
| author | never |
|---|---|
| date | Fri, 18 Mar 2011 16:00:34 -0700 |
| parents | 0a8e0d4345b3 |
| children | 63997f575155 |
| rev | line source |
|---|---|
| 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.*; | |
| 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() { | |
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842 final InstanceKlass systemKls = getSystemDictionary().getSystemKlass(); |
| 0 | 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 { | |
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848 sysProps = (Properties) objReader.readObject(field.getValue(systemKls.getJavaMirror())); |
| 0 | 849 } catch (Exception e) { |
| 850 if (Assert.ASSERTS_ENABLED) { | |
| 851 e.printStackTrace(); | |
| 852 } | |
| 853 } | |
| 854 } | |
| 855 } | |
| 856 }, false); | |
| 857 } | |
| 858 } |