Mercurial > hg > graal-compiler
annotate agent/src/share/classes/sun/jvm/hotspot/runtime/VM.java @ 6848:8e47bac5643a
7054512: Compress class pointers after perm gen removal
Summary: support of compress class pointers in the compilers.
Reviewed-by: kvn, twisti
| author | roland |
|---|---|
| date | Tue, 09 Oct 2012 10:11:38 +0200 |
| parents | 5a98bf7d847b |
| children | ec0c4951286c |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2000, 2012, 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; | |
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95 /** Flag indicating whether invokedynamic support is on */ |
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96 private boolean enableInvokeDynamic; |
| 0 | 97 /** alignment constants */ |
| 98 private boolean isLP64; | |
| 99 private int bytesPerLong; | |
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100 private int bytesPerWord; |
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101 private int objectAlignmentInBytes; |
| 0 | 102 private int minObjAlignmentInBytes; |
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103 private int logMinObjAlignmentInBytes; |
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104 private int heapWordSize; |
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105 private int heapOopSize; |
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106 private int klassPtrSize; |
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107 private int oopSize; |
| 0 | 108 /** This is only present in a non-core build */ |
| 109 private CodeCache codeCache; | |
| 110 /** This is only present in a C1 build */ | |
| 111 private Runtime1 runtime1; | |
| 112 /** These constants come from globalDefinitions.hpp */ | |
| 113 private int invocationEntryBCI; | |
| 114 private int invalidOSREntryBCI; | |
| 115 private ReversePtrs revPtrs; | |
| 116 private VMRegImpl vmregImpl; | |
| 117 | |
| 118 // System.getProperties from debuggee VM | |
| 119 private Properties sysProps; | |
| 120 | |
| 121 // VM version strings come from Abstract_VM_Version class | |
| 122 private String vmRelease; | |
| 123 private String vmInternalInfo; | |
| 124 | |
| 125 private Flag[] commandLineFlags; | |
| 126 private Map flagsMap; | |
| 127 | |
| 128 private static Type intxType; | |
| 129 private static Type uintxType; | |
| 130 private static CIntegerType boolType; | |
| 131 private Boolean sharingEnabled; | |
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132 private Boolean compressedOopsEnabled; |
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133 private Boolean compressedKlassPointersEnabled; |
| 0 | 134 |
| 135 // command line flags supplied to VM - see struct Flag in globals.hpp | |
| 136 public static final class Flag { | |
| 137 private String type; | |
| 138 private String name; | |
| 139 private Address addr; | |
| 140 private String kind; | |
| 3939 | 141 private int origin; |
| 0 | 142 |
| 3939 | 143 private Flag(String type, String name, Address addr, String kind, int origin) { |
| 0 | 144 this.type = type; |
| 145 this.name = name; | |
| 146 this.addr = addr; | |
| 147 this.kind = kind; | |
| 3939 | 148 this.origin = origin; |
| 0 | 149 } |
| 150 | |
| 151 public String getType() { | |
| 152 return type; | |
| 153 } | |
| 154 | |
| 155 public String getName() { | |
| 156 return name; | |
| 157 } | |
| 158 | |
| 159 public Address getAddress() { | |
| 160 return addr; | |
| 161 } | |
| 162 | |
| 163 public String getKind() { | |
| 164 return kind; | |
| 165 } | |
| 166 | |
| 3939 | 167 public int getOrigin() { |
| 168 return origin; | |
| 169 } | |
| 170 | |
| 0 | 171 public boolean isBool() { |
| 172 return type.equals("bool"); | |
| 173 } | |
| 174 | |
| 175 public boolean getBool() { | |
| 176 if (Assert.ASSERTS_ENABLED) { | |
| 177 Assert.that(isBool(), "not a bool flag!"); | |
| 178 } | |
| 179 return addr.getCIntegerAt(0, boolType.getSize(), boolType.isUnsigned()) | |
| 180 != 0; | |
| 181 } | |
| 182 | |
| 183 public boolean isIntx() { | |
| 184 return type.equals("intx"); | |
| 185 } | |
| 186 | |
| 187 public long getIntx() { | |
| 188 if (Assert.ASSERTS_ENABLED) { | |
| 189 Assert.that(isIntx(), "not a intx flag!"); | |
| 190 } | |
| 191 return addr.getCIntegerAt(0, intxType.getSize(), false); | |
| 192 } | |
| 193 | |
| 194 public boolean isUIntx() { | |
| 195 return type.equals("uintx"); | |
| 196 } | |
| 197 | |
| 198 public long getUIntx() { | |
| 199 if (Assert.ASSERTS_ENABLED) { | |
| 200 Assert.that(isUIntx(), "not a uintx flag!"); | |
| 201 } | |
| 202 return addr.getCIntegerAt(0, uintxType.getSize(), true); | |
| 203 } | |
| 204 | |
| 205 public String getValue() { | |
| 206 if (isBool()) { | |
| 207 return new Boolean(getBool()).toString(); | |
| 208 } else if (isIntx()) { | |
| 209 return new Long(getIntx()).toString(); | |
| 210 } else if (isUIntx()) { | |
| 211 return new Long(getUIntx()).toString(); | |
| 212 } else { | |
| 213 return null; | |
| 214 } | |
| 215 } | |
| 216 }; | |
| 217 | |
| 218 private static void checkVMVersion(String vmRelease) { | |
| 219 if (System.getProperty("sun.jvm.hotspot.runtime.VM.disableVersionCheck") == null) { | |
| 220 // read sa build version. | |
| 221 String versionProp = "sun.jvm.hotspot.runtime.VM.saBuildVersion"; | |
| 222 String saVersion = saProps.getProperty(versionProp); | |
| 223 if (saVersion == null) | |
| 224 throw new RuntimeException("Missing property " + versionProp); | |
| 225 | |
| 226 // Strip nonproduct VM version substring (note: saVersion doesn't have it). | |
| 227 String vmVersion = vmRelease.replaceAll("(-fastdebug)|(-debug)|(-jvmg)|(-optimized)|(-profiled)",""); | |
| 228 | |
| 229 if (saVersion.equals(vmVersion)) { | |
| 230 // Exact match | |
| 231 return; | |
| 232 } | |
| 233 if (saVersion.indexOf('-') == saVersion.lastIndexOf('-') && | |
| 234 vmVersion.indexOf('-') == vmVersion.lastIndexOf('-')) { | |
| 235 // Throw exception if different release versions: | |
| 236 // <major>.<minor>-b<n> | |
| 237 throw new VMVersionMismatchException(saVersion, vmRelease); | |
| 238 } else { | |
| 239 // Otherwise print warning to allow mismatch not release versions | |
| 240 // during development. | |
| 241 System.err.println("WARNING: Hotspot VM version " + vmRelease + | |
| 242 " does not match with SA version " + saVersion + | |
| 243 "." + " You may see unexpected results. "); | |
| 244 } | |
| 245 } else { | |
| 246 System.err.println("WARNING: You have disabled SA and VM version check. You may be " + | |
| 247 "using incompatible version of SA and you may see unexpected " + | |
| 248 "results."); | |
| 249 } | |
| 250 } | |
| 251 | |
| 252 private static final boolean disableDerivedPrinterTableCheck; | |
| 253 private static final Properties saProps; | |
| 254 | |
| 255 static { | |
| 256 saProps = new Properties(); | |
| 257 URL url = null; | |
| 258 try { | |
| 259 url = VM.class.getClassLoader().getResource("sa.properties"); | |
| 260 saProps.load(new BufferedInputStream(url.openStream())); | |
| 261 } catch (Exception e) { | |
| 262 throw new RuntimeException("Unable to load properties " + | |
| 263 (url == null ? "null" : url.toString()) + | |
| 264 ": " + e.getMessage()); | |
| 265 } | |
| 266 | |
| 267 disableDerivedPrinterTableCheck = System.getProperty("sun.jvm.hotspot.runtime.VM.disableDerivedPointerTableCheck") != null; | |
| 268 } | |
| 269 | |
| 270 private VM(TypeDataBase db, JVMDebugger debugger, boolean isBigEndian) { | |
| 271 this.db = db; | |
| 272 this.debugger = debugger; | |
| 273 this.isBigEndian = isBigEndian; | |
| 274 | |
| 275 // Note that we don't construct universe, heap, threads, | |
| 276 // interpreter, or stubRoutines here (any more). The current | |
| 277 // initialization mechanisms require that the VM be completely set | |
| 278 // up (i.e., out of its constructor, with soleInstance assigned) | |
| 279 // before their static initializers are run. | |
| 280 | |
| 281 if (db.getAddressSize() == 4) { | |
| 282 logAddressSize = 2; | |
| 283 } else if (db.getAddressSize() == 8) { | |
| 284 logAddressSize = 3; | |
| 285 } else { | |
| 286 throw new RuntimeException("Address size " + db.getAddressSize() + " not yet supported"); | |
| 287 } | |
| 288 | |
| 289 // read VM version info | |
| 290 try { | |
| 291 Type vmVersion = db.lookupType("Abstract_VM_Version"); | |
| 292 Address releaseAddr = vmVersion.getAddressField("_s_vm_release").getValue(); | |
| 293 vmRelease = CStringUtilities.getString(releaseAddr); | |
| 294 Address vmInternalInfoAddr = vmVersion.getAddressField("_s_internal_vm_info_string").getValue(); | |
| 295 vmInternalInfo = CStringUtilities.getString(vmInternalInfoAddr); | |
| 296 } catch (Exception exp) { | |
| 297 throw new RuntimeException("can't determine target's VM version : " + exp.getMessage()); | |
| 298 } | |
| 299 | |
| 300 checkVMVersion(vmRelease); | |
| 301 | |
| 302 stackBias = db.lookupIntConstant("STACK_BIAS").intValue(); | |
| 303 invocationEntryBCI = db.lookupIntConstant("InvocationEntryBci").intValue(); | |
| 304 invalidOSREntryBCI = db.lookupIntConstant("InvalidOSREntryBci").intValue(); | |
| 305 | |
| 306 // We infer the presence of C1 or C2 from a couple of fields we | |
| 307 // already have present in the type database | |
| 308 { | |
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309 Type type = db.lookupType("Method"); |
| 0 | 310 if (type.getField("_from_compiled_entry", false, false) == null) { |
| 311 // Neither C1 nor C2 is present | |
| 312 usingClientCompiler = false; | |
| 313 usingServerCompiler = false; | |
| 314 } else { | |
| 315 // Determine whether C2 is present | |
| 3944 | 316 if (db.lookupType("Matcher", false) != null) { |
| 0 | 317 usingServerCompiler = true; |
| 318 } else { | |
| 319 usingClientCompiler = true; | |
| 320 } | |
| 321 } | |
| 322 } | |
| 323 | |
| 324 useTLAB = (db.lookupIntConstant("UseTLAB").intValue() != 0); | |
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325 enableInvokeDynamic = (db.lookupIntConstant("EnableInvokeDynamic").intValue() != 0); |
| 0 | 326 |
| 327 if (debugger != null) { | |
| 328 isLP64 = debugger.getMachineDescription().isLP64(); | |
| 329 } | |
| 330 bytesPerLong = db.lookupIntConstant("BytesPerLong").intValue(); | |
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331 bytesPerWord = db.lookupIntConstant("BytesPerWord").intValue(); |
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332 heapWordSize = db.lookupIntConstant("HeapWordSize").intValue(); |
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333 oopSize = db.lookupIntConstant("oopSize").intValue(); |
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334 |
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335 intxType = db.lookupType("intx"); |
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336 uintxType = db.lookupType("uintx"); |
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337 boolType = (CIntegerType) db.lookupType("bool"); |
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338 |
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339 minObjAlignmentInBytes = getObjectAlignmentInBytes(); |
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340 if (minObjAlignmentInBytes == 8) { |
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341 logMinObjAlignmentInBytes = 3; |
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342 } else if (minObjAlignmentInBytes == 16) { |
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343 logMinObjAlignmentInBytes = 4; |
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344 } else { |
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345 throw new RuntimeException("Object alignment " + minObjAlignmentInBytes + " not yet supported"); |
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346 } |
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347 |
| 749 | 348 if (isCompressedOopsEnabled()) { |
| 349 // Size info for oops within java objects is fixed | |
| 350 heapOopSize = (int)getIntSize(); | |
| 351 } else { | |
| 352 heapOopSize = (int)getOopSize(); | |
| 353 } | |
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354 |
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355 if (isCompressedKlassPointersEnabled()) { |
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356 klassPtrSize = (int)getIntSize(); |
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357 } else { |
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358 klassPtrSize = (int)getOopSize(); // same as an oop |
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359 } |
| 0 | 360 } |
| 361 | |
| 362 /** This could be used by a reflective runtime system */ | |
| 363 public static void initialize(TypeDataBase db, boolean isBigEndian) { | |
| 364 if (soleInstance != null) { | |
| 365 throw new RuntimeException("Attempt to initialize VM twice"); | |
| 366 } | |
| 367 soleInstance = new VM(db, null, isBigEndian); | |
| 368 for (Iterator iter = vmInitializedObservers.iterator(); iter.hasNext(); ) { | |
| 369 ((Observer) iter.next()).update(null, null); | |
| 370 } | |
| 371 } | |
| 372 | |
| 373 /** This is used by the debugging system */ | |
| 374 public static void initialize(TypeDataBase db, JVMDebugger debugger) { | |
| 375 if (soleInstance != null) { | |
| 376 throw new RuntimeException("Attempt to initialize VM twice"); | |
| 377 } | |
| 378 soleInstance = new VM(db, debugger, debugger.getMachineDescription().isBigEndian()); | |
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379 |
| 0 | 380 for (Iterator iter = vmInitializedObservers.iterator(); iter.hasNext(); ) { |
| 381 ((Observer) iter.next()).update(null, null); | |
| 382 } | |
| 650 | 383 |
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384 debugger.putHeapConst(soleInstance.getHeapOopSize(), soleInstance.getKlassPtrSize(), |
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385 Universe.getNarrowOopBase(), Universe.getNarrowOopShift(), |
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386 Universe.getNarrowKlassBase(), Universe.getNarrowKlassShift()); |
| 0 | 387 } |
| 388 | |
| 389 /** This is used by the debugging system */ | |
| 390 public static void shutdown() { | |
| 391 soleInstance = null; | |
| 392 } | |
| 393 | |
| 394 /** This is used by both the debugger and any runtime system. It is | |
| 395 the basic mechanism by which classes which mimic underlying VM | |
| 396 functionality cause themselves to be initialized. The given | |
| 397 observer will be notified (with arguments (null, null)) when the | |
| 398 VM is re-initialized, as well as when it registers itself with | |
| 399 the VM. */ | |
| 400 public static void registerVMInitializedObserver(Observer o) { | |
| 401 vmInitializedObservers.add(o); | |
| 402 o.update(null, null); | |
| 403 } | |
| 404 | |
| 405 /** This is the primary accessor used by both the debugger and any | |
| 406 potential runtime system */ | |
| 407 public static VM getVM() { | |
| 408 if (soleInstance == null) { | |
| 409 throw new RuntimeException("VM.initialize() was not yet called"); | |
| 410 } | |
| 411 return soleInstance; | |
| 412 } | |
| 413 | |
| 414 /** This is only used by the debugging system. The given observer | |
| 415 will be notified if the underlying VM resumes execution. NOTE | |
| 416 that the given observer is not triggered if the VM is currently | |
| 417 running and therefore differs in behavior from {@link | |
| 418 #registerVMInitializedObserver} (because of the possibility of | |
| 419 race conditions if the observer is added while the VM is being | |
| 420 suspended or resumed). */ | |
| 421 public void registerVMResumedObserver(Observer o) { | |
| 422 vmResumedObservers.add(o); | |
| 423 } | |
| 424 | |
| 425 /** This is only used by the debugging system. The given observer | |
| 426 will be notified if the underlying VM suspends execution. NOTE | |
| 427 that the given observer is not triggered if the VM is currently | |
| 428 suspended and therefore differs in behavior from {@link | |
| 429 #registerVMInitializedObserver} (because of the possibility of | |
| 430 race conditions if the observer is added while the VM is being | |
| 431 suspended or resumed). */ | |
| 432 public void registerVMSuspendedObserver(Observer o) { | |
| 433 vmSuspendedObservers.add(o); | |
| 434 } | |
| 435 | |
| 436 /** This is only used by the debugging system. Informs all | |
| 437 registered resumption observers that the VM has been resumed. | |
| 438 The application is responsible for actually having performed the | |
| 439 resumption. No OopHandles must be used after this point, as they | |
| 440 may move in the target address space due to garbage | |
| 441 collection. */ | |
| 442 public void fireVMResumed() { | |
| 443 for (Iterator iter = vmResumedObservers.iterator(); iter.hasNext(); ) { | |
| 444 ((Observer) iter.next()).update(null, null); | |
| 445 } | |
| 446 } | |
| 447 | |
| 448 /** This is only used by the debugging system. Informs all | |
| 449 registered suspension observers that the VM has been suspended. | |
| 450 The application is responsible for actually having performed the | |
| 451 suspension. Garbage collection must be forbidden at this point; | |
| 452 for example, a JPDA-level suspension is not adequate since the | |
| 453 VM thread may still be running. */ | |
| 454 public void fireVMSuspended() { | |
| 455 for (Iterator iter = vmSuspendedObservers.iterator(); iter.hasNext(); ) { | |
| 456 ((Observer) iter.next()).update(null, null); | |
| 457 } | |
| 458 } | |
| 459 | |
| 460 /** Returns the OS this VM is running on. Notice that by delegating | |
| 461 to the debugger we can transparently support remote | |
| 462 debugging. */ | |
| 463 public String getOS() { | |
| 464 if (debugger != null) { | |
| 465 return debugger.getOS(); | |
| 466 } | |
| 467 return PlatformInfo.getOS(); | |
| 468 } | |
| 469 | |
| 470 /** Returns the CPU this VM is running on. Notice that by delegating | |
| 471 to the debugger we can transparently support remote | |
| 472 debugging. */ | |
| 473 public String getCPU() { | |
| 474 if (debugger != null) { | |
| 475 return debugger.getCPU(); | |
| 476 } | |
| 477 return PlatformInfo.getCPU(); | |
| 478 } | |
| 479 | |
| 480 public Type lookupType(String cTypeName) { | |
| 481 return db.lookupType(cTypeName); | |
| 482 } | |
| 483 | |
| 484 public Integer lookupIntConstant(String name) { | |
| 485 return db.lookupIntConstant(name); | |
| 486 } | |
| 487 | |
| 6782 | 488 // Convenience function for conversions |
| 489 static public long getAddressValue(Address addr) { | |
| 490 return VM.getVM().getDebugger().getAddressValue(addr); | |
| 491 } | |
| 492 | |
| 0 | 493 public long getAddressSize() { |
| 494 return db.getAddressSize(); | |
| 495 } | |
| 496 | |
| 497 public long getOopSize() { | |
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498 return oopSize; |
| 0 | 499 } |
| 500 | |
| 501 public long getLogAddressSize() { | |
| 502 return logAddressSize; | |
| 503 } | |
| 504 | |
|
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505 public long getIntSize() { |
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506 return db.getJIntType().getSize(); |
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507 } |
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508 |
| 0 | 509 /** NOTE: this offset is in BYTES in this system! */ |
| 510 public long getStackBias() { | |
| 511 return stackBias; | |
| 512 } | |
| 513 | |
| 514 /** Indicates whether the underlying machine supports the LP64 data | |
| 515 model. This is needed for conditionalizing code in a few places */ | |
| 516 public boolean isLP64() { | |
| 517 if (Assert.ASSERTS_ENABLED) { | |
| 518 Assert.that(isDebugging(), "Debugging system only for now"); | |
| 519 } | |
| 520 return isLP64; | |
| 521 } | |
| 522 | |
| 523 /** Get bytes-per-long == long/double natural alignment. */ | |
| 524 public int getBytesPerLong() { | |
| 525 return bytesPerLong; | |
| 526 } | |
| 527 | |
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528 public int getBytesPerWord() { |
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529 return bytesPerWord; |
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530 } |
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531 |
| 0 | 532 /** Get minimum object alignment in bytes. */ |
| 533 public int getMinObjAlignmentInBytes() { | |
| 534 return minObjAlignmentInBytes; | |
| 535 } | |
|
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536 public int getLogMinObjAlignmentInBytes() { |
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537 return logMinObjAlignmentInBytes; |
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538 } |
| 0 | 539 |
|
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540 public int getHeapWordSize() { |
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541 return heapWordSize; |
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542 } |
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543 |
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544 public int getHeapOopSize() { |
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545 return heapOopSize; |
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546 } |
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547 |
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548 public int getKlassPtrSize() { |
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549 return klassPtrSize; |
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550 } |
| 0 | 551 /** Utility routine for getting data structure alignment correct */ |
| 552 public long alignUp(long size, long alignment) { | |
| 553 return (size + alignment - 1) & ~(alignment - 1); | |
| 554 } | |
| 555 | |
| 556 /** Utility routine for getting data structure alignment correct */ | |
| 557 public long alignDown(long size, long alignment) { | |
| 558 return size & ~(alignment - 1); | |
| 559 } | |
| 560 | |
| 561 /** Utility routine for building an int from two "unsigned" 16-bit | |
| 562 shorts */ | |
| 563 public int buildIntFromShorts(short low, short high) { | |
| 564 return (((int) high) << 16) | (((int) low) & 0xFFFF); | |
| 565 } | |
| 566 | |
| 567 /** Utility routine for building a long from two "unsigned" 32-bit | |
| 568 ints in <b>platform-dependent</b> order */ | |
| 569 public long buildLongFromIntsPD(int oneHalf, int otherHalf) { | |
| 570 if (isBigEndian) { | |
| 571 return (((long) otherHalf) << 32) | (((long) oneHalf) & 0x00000000FFFFFFFFL); | |
| 572 } else{ | |
| 573 return (((long) oneHalf) << 32) | (((long) otherHalf) & 0x00000000FFFFFFFFL); | |
| 574 } | |
| 575 } | |
| 576 | |
| 577 /** Indicates whether Thread-Local Allocation Buffers are used */ | |
| 578 public boolean getUseTLAB() { | |
| 579 return useTLAB; | |
| 580 } | |
| 581 | |
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582 public boolean getEnableInvokeDynamic() { |
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583 return enableInvokeDynamic; |
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584 } |
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585 |
| 0 | 586 public TypeDataBase getTypeDataBase() { |
| 587 return db; | |
| 588 } | |
| 589 | |
| 590 public Universe getUniverse() { | |
| 591 if (universe == null) { | |
| 592 universe = new Universe(); | |
| 593 } | |
| 594 return universe; | |
| 595 } | |
| 596 | |
| 597 public ObjectHeap getObjectHeap() { | |
| 598 if (heap == null) { | |
| 599 heap = new ObjectHeap(db); | |
| 600 } | |
| 601 return heap; | |
| 602 } | |
| 603 | |
| 604 public SymbolTable getSymbolTable() { | |
| 605 if (symbols == null) { | |
| 606 symbols = SymbolTable.getTheTable(); | |
| 607 } | |
| 608 return symbols; | |
| 609 } | |
| 610 | |
| 611 public StringTable getStringTable() { | |
| 612 if (strings == null) { | |
| 613 strings = StringTable.getTheTable(); | |
| 614 } | |
| 615 return strings; | |
| 616 } | |
| 617 | |
| 618 public SystemDictionary getSystemDictionary() { | |
| 619 if (dict == null) { | |
| 620 dict = new SystemDictionary(); | |
| 621 } | |
| 622 return dict; | |
| 623 } | |
| 624 | |
| 625 public Threads getThreads() { | |
| 626 if (threads == null) { | |
| 627 threads = new Threads(); | |
| 628 } | |
| 629 return threads; | |
| 630 } | |
| 631 | |
| 632 public ObjectSynchronizer getObjectSynchronizer() { | |
| 633 if (synchronizer == null) { | |
| 634 synchronizer = new ObjectSynchronizer(); | |
| 635 } | |
| 636 return synchronizer; | |
| 637 } | |
| 638 | |
| 639 public JNIHandles getJNIHandles() { | |
| 640 if (handles == null) { | |
| 641 handles = new JNIHandles(); | |
| 642 } | |
| 643 return handles; | |
| 644 } | |
| 645 | |
| 646 public Interpreter getInterpreter() { | |
| 647 if (interpreter == null) { | |
| 648 interpreter = new Interpreter(); | |
| 649 } | |
| 650 return interpreter; | |
| 651 } | |
| 652 | |
| 653 public StubRoutines getStubRoutines() { | |
| 654 if (stubRoutines == null) { | |
| 655 stubRoutines = new StubRoutines(); | |
| 656 } | |
| 657 return stubRoutines; | |
| 658 } | |
| 659 | |
| 660 public VMRegImpl getVMRegImplInfo() { | |
| 661 if (vmregImpl == null) { | |
| 662 vmregImpl = new VMRegImpl(); | |
| 663 } | |
| 664 return vmregImpl; | |
| 665 } | |
| 666 | |
| 667 public Bytes getBytes() { | |
| 668 if (bytes == null) { | |
| 669 bytes = new Bytes(debugger.getMachineDescription()); | |
| 670 } | |
| 671 return bytes; | |
| 672 } | |
| 673 | |
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674 /** Returns true if this is a isBigEndian, false otherwise */ |
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675 public boolean isBigEndian() { |
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676 return isBigEndian; |
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677 } |
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678 |
| 0 | 679 /** Returns true if this is a "core" build, false if either C1 or C2 |
| 680 is present */ | |
| 681 public boolean isCore() { | |
| 682 return (!(usingClientCompiler || usingServerCompiler)); | |
| 683 } | |
| 684 | |
| 685 /** Returns true if this is a C1 build, false otherwise */ | |
| 686 public boolean isClientCompiler() { | |
| 687 return usingClientCompiler; | |
| 688 } | |
| 689 | |
| 690 /** Returns true if this is a C2 build, false otherwise */ | |
| 691 public boolean isServerCompiler() { | |
| 692 return usingServerCompiler; | |
| 693 } | |
| 694 | |
| 695 /** Returns true if C2 derived pointer table should be used, false otherwise */ | |
| 696 public boolean useDerivedPointerTable() { | |
| 697 return !disableDerivedPrinterTableCheck; | |
| 698 } | |
| 699 | |
| 700 /** Returns the code cache; should not be used if is core build */ | |
| 701 public CodeCache getCodeCache() { | |
| 702 if (Assert.ASSERTS_ENABLED) { | |
| 703 Assert.that(!isCore(), "noncore builds only"); | |
| 704 } | |
| 705 if (codeCache == null) { | |
| 706 codeCache = new CodeCache(); | |
| 707 } | |
| 708 return codeCache; | |
| 709 } | |
| 710 | |
| 711 /** Should only be called for C1 builds */ | |
| 712 public Runtime1 getRuntime1() { | |
| 713 if (Assert.ASSERTS_ENABLED) { | |
| 714 Assert.that(isClientCompiler(), "C1 builds only"); | |
| 715 } | |
| 716 if (runtime1 == null) { | |
| 717 runtime1 = new Runtime1(); | |
| 718 } | |
| 719 return runtime1; | |
| 720 } | |
| 721 | |
| 722 /** Test to see whether we're in debugging mode (NOTE: this really | |
| 723 should not be tested by this code; currently only used in | |
| 724 StackFrameStream) */ | |
| 725 public boolean isDebugging() { | |
| 726 return (debugger != null); | |
| 727 } | |
| 728 | |
| 729 /** This is only used by the debugging (i.e., non-runtime) system */ | |
| 730 public JVMDebugger getDebugger() { | |
| 731 if (debugger == null) { | |
| 732 throw new RuntimeException("Attempt to use debugger in runtime system"); | |
| 733 } | |
| 734 return debugger; | |
| 735 } | |
| 736 | |
| 737 /** Indicates whether a given program counter is in Java code. This | |
| 738 includes but is not spanned by the interpreter and code cache. | |
| 739 Only used in the debugging system, for implementing | |
| 740 JavaThread.currentFrameGuess() on x86. */ | |
| 741 public boolean isJavaPCDbg(Address addr) { | |
| 742 // FIXME: this is not a complete enough set: must include areas | |
| 743 // like vtable stubs | |
| 744 return (getInterpreter().contains(addr) || | |
| 745 getCodeCache().contains(addr)); | |
| 746 } | |
| 747 | |
| 748 /** FIXME: figure out where to stick this */ | |
| 749 public int getInvocationEntryBCI() { | |
| 750 return invocationEntryBCI; | |
| 751 } | |
| 752 | |
| 753 /** FIXME: figure out where to stick this */ | |
| 754 public int getInvalidOSREntryBCI() { | |
| 755 return invalidOSREntryBCI; | |
| 756 } | |
| 757 | |
| 758 // FIXME: figure out where to stick this | |
| 759 public boolean wizardMode() { | |
| 760 return true; | |
| 761 } | |
| 762 | |
| 763 public ReversePtrs getRevPtrs() { | |
| 764 return revPtrs; | |
| 765 } | |
| 766 | |
| 767 public void setRevPtrs(ReversePtrs rp) { | |
| 768 revPtrs = rp; | |
| 769 } | |
| 770 | |
| 771 // returns null, if not available. | |
| 772 public String getVMRelease() { | |
| 773 return vmRelease; | |
| 774 } | |
| 775 | |
| 776 // returns null, if not available. | |
| 777 public String getVMInternalInfo() { | |
| 778 return vmInternalInfo; | |
| 779 } | |
| 780 | |
| 781 public boolean isSharingEnabled() { | |
| 782 if (sharingEnabled == null) { | |
| 783 Flag flag = getCommandLineFlag("UseSharedSpaces"); | |
| 784 sharingEnabled = (flag == null)? Boolean.FALSE : | |
| 785 (flag.getBool()? Boolean.TRUE: Boolean.FALSE); | |
| 786 } | |
| 787 return sharingEnabled.booleanValue(); | |
| 788 } | |
| 789 | |
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790 public boolean isCompressedOopsEnabled() { |
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791 if (compressedOopsEnabled == null) { |
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792 Flag flag = getCommandLineFlag("UseCompressedOops"); |
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793 compressedOopsEnabled = (flag == null) ? Boolean.FALSE: |
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794 (flag.getBool()? Boolean.TRUE: Boolean.FALSE); |
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795 } |
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796 return compressedOopsEnabled.booleanValue(); |
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797 } |
| 0 | 798 |
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799 public boolean isCompressedKlassPointersEnabled() { |
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800 if (compressedKlassPointersEnabled == null) { |
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801 Flag flag = getCommandLineFlag("UseCompressedKlassPointers"); |
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802 compressedKlassPointersEnabled = (flag == null) ? Boolean.FALSE: |
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803 (flag.getBool()? Boolean.TRUE: Boolean.FALSE); |
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804 } |
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805 return compressedKlassPointersEnabled.booleanValue(); |
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806 } |
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807 |
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808 public int getObjectAlignmentInBytes() { |
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809 if (objectAlignmentInBytes == 0) { |
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810 Flag flag = getCommandLineFlag("ObjectAlignmentInBytes"); |
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811 objectAlignmentInBytes = (flag == null) ? 8 : (int)flag.getIntx(); |
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812 } |
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813 return objectAlignmentInBytes; |
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814 } |
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815 |
| 0 | 816 // returns null, if not available. |
| 817 public Flag[] getCommandLineFlags() { | |
| 818 if (commandLineFlags == null) { | |
| 819 readCommandLineFlags(); | |
| 820 } | |
| 821 | |
| 822 return commandLineFlags; | |
| 823 } | |
| 824 | |
| 825 public Flag getCommandLineFlag(String name) { | |
| 826 if (flagsMap == null) { | |
| 827 flagsMap = new HashMap(); | |
| 828 Flag[] flags = getCommandLineFlags(); | |
| 829 for (int i = 0; i < flags.length; i++) { | |
| 830 flagsMap.put(flags[i].getName(), flags[i]); | |
| 831 } | |
| 832 } | |
| 833 return (Flag) flagsMap.get(name); | |
| 834 } | |
| 835 | |
| 836 private void readCommandLineFlags() { | |
| 837 // get command line flags | |
| 838 TypeDataBase db = getTypeDataBase(); | |
| 3939 | 839 Type flagType = db.lookupType("Flag"); |
| 840 int numFlags = (int) flagType.getCIntegerField("numFlags").getValue(); | |
| 841 // NOTE: last flag contains null values. | |
| 842 commandLineFlags = new Flag[numFlags - 1]; | |
| 843 | |
| 844 Address flagAddr = flagType.getAddressField("flags").getValue(); | |
| 0 | 845 |
| 3939 | 846 AddressField typeFld = flagType.getAddressField("type"); |
| 847 AddressField nameFld = flagType.getAddressField("name"); | |
| 848 AddressField addrFld = flagType.getAddressField("addr"); | |
| 849 AddressField kindFld = flagType.getAddressField("kind"); | |
| 850 CIntField originFld = new CIntField(flagType.getCIntegerField("origin"), 0); | |
| 0 | 851 |
| 3939 | 852 long flagSize = flagType.getSize(); // sizeof(Flag) |
| 0 | 853 |
| 3939 | 854 // NOTE: last flag contains null values. |
| 855 for (int f = 0; f < numFlags - 1; f++) { | |
| 856 String type = CStringUtilities.getString(typeFld.getValue(flagAddr)); | |
| 857 String name = CStringUtilities.getString(nameFld.getValue(flagAddr)); | |
| 858 Address addr = addrFld.getValue(flagAddr); | |
| 859 String kind = CStringUtilities.getString(kindFld.getValue(flagAddr)); | |
| 860 int origin = (int)originFld.getValue(flagAddr); | |
| 861 commandLineFlags[f] = new Flag(type, name, addr, kind, origin); | |
| 862 flagAddr = flagAddr.addOffsetTo(flagSize); | |
| 863 } | |
| 0 | 864 |
| 3939 | 865 // sort flags by name |
| 866 Arrays.sort(commandLineFlags, new Comparator() { | |
| 867 public int compare(Object o1, Object o2) { | |
| 868 Flag f1 = (Flag) o1; | |
| 869 Flag f2 = (Flag) o2; | |
| 870 return f1.getName().compareTo(f2.getName()); | |
| 871 } | |
| 872 }); | |
| 0 | 873 } |
| 874 | |
| 875 public String getSystemProperty(String key) { | |
| 876 Properties props = getSystemProperties(); | |
| 877 return (props != null)? props.getProperty(key) : null; | |
| 878 } | |
| 879 | |
| 880 public Properties getSystemProperties() { | |
| 881 if (sysProps == null) { | |
| 882 readSystemProperties(); | |
| 883 } | |
| 884 return sysProps; | |
| 885 } | |
| 886 | |
| 887 private void readSystemProperties() { | |
|
2411
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888 final InstanceKlass systemKls = getSystemDictionary().getSystemKlass(); |
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889 systemKls.iterateStaticFields(new DefaultOopVisitor() { |
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890 ObjectReader objReader = new ObjectReader(); |
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891 public void doOop(sun.jvm.hotspot.oops.OopField field, boolean isVMField) { |
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892 if (field.getID().getName().equals("props")) { |
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893 try { |
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894 sysProps = (Properties) objReader.readObject(field.getValue(getObj())); |
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895 } catch (Exception e) { |
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896 e.printStackTrace(); |
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897 } |
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898 } |
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899 } |
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900 }); |
| 0 | 901 } |
| 902 } |