Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/runtime/VM.java @ 8005:ec0c4951286c
8004710: NPG: jmap could throw sun.jvm.hotspot.types.WrongTypeException after PermGen removal
Summary: When calculating live object regions, make sure that the alignment reserve, at the end of a TLAB, is excluded.
Reviewed-by: jmasa, brutisso
| author | stefank |
|---|---|
| date | Tue, 29 Jan 2013 10:51:33 +0100 |
| parents | 8e47bac5643a |
| children | f82bcc429e8c |
| 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; | |
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117 private int reserveForAllocationPrefetch; |
| 0 | 118 |
| 119 // System.getProperties from debuggee VM | |
| 120 private Properties sysProps; | |
| 121 | |
| 122 // VM version strings come from Abstract_VM_Version class | |
| 123 private String vmRelease; | |
| 124 private String vmInternalInfo; | |
| 125 | |
| 126 private Flag[] commandLineFlags; | |
| 127 private Map flagsMap; | |
| 128 | |
| 129 private static Type intxType; | |
| 130 private static Type uintxType; | |
| 131 private static CIntegerType boolType; | |
| 132 private Boolean sharingEnabled; | |
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133 private Boolean compressedOopsEnabled; |
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134 private Boolean compressedKlassPointersEnabled; |
| 0 | 135 |
| 136 // command line flags supplied to VM - see struct Flag in globals.hpp | |
| 137 public static final class Flag { | |
| 138 private String type; | |
| 139 private String name; | |
| 140 private Address addr; | |
| 141 private String kind; | |
| 3939 | 142 private int origin; |
| 0 | 143 |
| 3939 | 144 private Flag(String type, String name, Address addr, String kind, int origin) { |
| 0 | 145 this.type = type; |
| 146 this.name = name; | |
| 147 this.addr = addr; | |
| 148 this.kind = kind; | |
| 3939 | 149 this.origin = origin; |
| 0 | 150 } |
| 151 | |
| 152 public String getType() { | |
| 153 return type; | |
| 154 } | |
| 155 | |
| 156 public String getName() { | |
| 157 return name; | |
| 158 } | |
| 159 | |
| 160 public Address getAddress() { | |
| 161 return addr; | |
| 162 } | |
| 163 | |
| 164 public String getKind() { | |
| 165 return kind; | |
| 166 } | |
| 167 | |
| 3939 | 168 public int getOrigin() { |
| 169 return origin; | |
| 170 } | |
| 171 | |
| 0 | 172 public boolean isBool() { |
| 173 return type.equals("bool"); | |
| 174 } | |
| 175 | |
| 176 public boolean getBool() { | |
| 177 if (Assert.ASSERTS_ENABLED) { | |
| 178 Assert.that(isBool(), "not a bool flag!"); | |
| 179 } | |
| 180 return addr.getCIntegerAt(0, boolType.getSize(), boolType.isUnsigned()) | |
| 181 != 0; | |
| 182 } | |
| 183 | |
| 184 public boolean isIntx() { | |
| 185 return type.equals("intx"); | |
| 186 } | |
| 187 | |
| 188 public long getIntx() { | |
| 189 if (Assert.ASSERTS_ENABLED) { | |
| 190 Assert.that(isIntx(), "not a intx flag!"); | |
| 191 } | |
| 192 return addr.getCIntegerAt(0, intxType.getSize(), false); | |
| 193 } | |
| 194 | |
| 195 public boolean isUIntx() { | |
| 196 return type.equals("uintx"); | |
| 197 } | |
| 198 | |
| 199 public long getUIntx() { | |
| 200 if (Assert.ASSERTS_ENABLED) { | |
| 201 Assert.that(isUIntx(), "not a uintx flag!"); | |
| 202 } | |
| 203 return addr.getCIntegerAt(0, uintxType.getSize(), true); | |
| 204 } | |
| 205 | |
| 206 public String getValue() { | |
| 207 if (isBool()) { | |
| 208 return new Boolean(getBool()).toString(); | |
| 209 } else if (isIntx()) { | |
| 210 return new Long(getIntx()).toString(); | |
| 211 } else if (isUIntx()) { | |
| 212 return new Long(getUIntx()).toString(); | |
| 213 } else { | |
| 214 return null; | |
| 215 } | |
| 216 } | |
| 217 }; | |
| 218 | |
| 219 private static void checkVMVersion(String vmRelease) { | |
| 220 if (System.getProperty("sun.jvm.hotspot.runtime.VM.disableVersionCheck") == null) { | |
| 221 // read sa build version. | |
| 222 String versionProp = "sun.jvm.hotspot.runtime.VM.saBuildVersion"; | |
| 223 String saVersion = saProps.getProperty(versionProp); | |
| 224 if (saVersion == null) | |
| 225 throw new RuntimeException("Missing property " + versionProp); | |
| 226 | |
| 227 // Strip nonproduct VM version substring (note: saVersion doesn't have it). | |
| 228 String vmVersion = vmRelease.replaceAll("(-fastdebug)|(-debug)|(-jvmg)|(-optimized)|(-profiled)",""); | |
| 229 | |
| 230 if (saVersion.equals(vmVersion)) { | |
| 231 // Exact match | |
| 232 return; | |
| 233 } | |
| 234 if (saVersion.indexOf('-') == saVersion.lastIndexOf('-') && | |
| 235 vmVersion.indexOf('-') == vmVersion.lastIndexOf('-')) { | |
| 236 // Throw exception if different release versions: | |
| 237 // <major>.<minor>-b<n> | |
| 238 throw new VMVersionMismatchException(saVersion, vmRelease); | |
| 239 } else { | |
| 240 // Otherwise print warning to allow mismatch not release versions | |
| 241 // during development. | |
| 242 System.err.println("WARNING: Hotspot VM version " + vmRelease + | |
| 243 " does not match with SA version " + saVersion + | |
| 244 "." + " You may see unexpected results. "); | |
| 245 } | |
| 246 } else { | |
| 247 System.err.println("WARNING: You have disabled SA and VM version check. You may be " + | |
| 248 "using incompatible version of SA and you may see unexpected " + | |
| 249 "results."); | |
| 250 } | |
| 251 } | |
| 252 | |
| 253 private static final boolean disableDerivedPrinterTableCheck; | |
| 254 private static final Properties saProps; | |
| 255 | |
| 256 static { | |
| 257 saProps = new Properties(); | |
| 258 URL url = null; | |
| 259 try { | |
| 260 url = VM.class.getClassLoader().getResource("sa.properties"); | |
| 261 saProps.load(new BufferedInputStream(url.openStream())); | |
| 262 } catch (Exception e) { | |
| 263 throw new RuntimeException("Unable to load properties " + | |
| 264 (url == null ? "null" : url.toString()) + | |
| 265 ": " + e.getMessage()); | |
| 266 } | |
| 267 | |
| 268 disableDerivedPrinterTableCheck = System.getProperty("sun.jvm.hotspot.runtime.VM.disableDerivedPointerTableCheck") != null; | |
| 269 } | |
| 270 | |
| 271 private VM(TypeDataBase db, JVMDebugger debugger, boolean isBigEndian) { | |
| 272 this.db = db; | |
| 273 this.debugger = debugger; | |
| 274 this.isBigEndian = isBigEndian; | |
| 275 | |
| 276 // Note that we don't construct universe, heap, threads, | |
| 277 // interpreter, or stubRoutines here (any more). The current | |
| 278 // initialization mechanisms require that the VM be completely set | |
| 279 // up (i.e., out of its constructor, with soleInstance assigned) | |
| 280 // before their static initializers are run. | |
| 281 | |
| 282 if (db.getAddressSize() == 4) { | |
| 283 logAddressSize = 2; | |
| 284 } else if (db.getAddressSize() == 8) { | |
| 285 logAddressSize = 3; | |
| 286 } else { | |
| 287 throw new RuntimeException("Address size " + db.getAddressSize() + " not yet supported"); | |
| 288 } | |
| 289 | |
| 290 // read VM version info | |
| 291 try { | |
| 292 Type vmVersion = db.lookupType("Abstract_VM_Version"); | |
| 293 Address releaseAddr = vmVersion.getAddressField("_s_vm_release").getValue(); | |
| 294 vmRelease = CStringUtilities.getString(releaseAddr); | |
| 295 Address vmInternalInfoAddr = vmVersion.getAddressField("_s_internal_vm_info_string").getValue(); | |
| 296 vmInternalInfo = CStringUtilities.getString(vmInternalInfoAddr); | |
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297 |
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298 CIntegerType intType = (CIntegerType) db.lookupType("int"); |
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299 CIntegerField reserveForAllocationPrefetchField = vmVersion.getCIntegerField("_reserve_for_allocation_prefetch"); |
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300 reserveForAllocationPrefetch = (int)reserveForAllocationPrefetchField.getCInteger(intType); |
| 0 | 301 } catch (Exception exp) { |
| 302 throw new RuntimeException("can't determine target's VM version : " + exp.getMessage()); | |
| 303 } | |
| 304 | |
| 305 checkVMVersion(vmRelease); | |
| 306 | |
| 307 stackBias = db.lookupIntConstant("STACK_BIAS").intValue(); | |
| 308 invocationEntryBCI = db.lookupIntConstant("InvocationEntryBci").intValue(); | |
| 309 invalidOSREntryBCI = db.lookupIntConstant("InvalidOSREntryBci").intValue(); | |
| 310 | |
| 311 // We infer the presence of C1 or C2 from a couple of fields we | |
| 312 // already have present in the type database | |
| 313 { | |
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314 Type type = db.lookupType("Method"); |
| 0 | 315 if (type.getField("_from_compiled_entry", false, false) == null) { |
| 316 // Neither C1 nor C2 is present | |
| 317 usingClientCompiler = false; | |
| 318 usingServerCompiler = false; | |
| 319 } else { | |
| 320 // Determine whether C2 is present | |
| 3944 | 321 if (db.lookupType("Matcher", false) != null) { |
| 0 | 322 usingServerCompiler = true; |
| 323 } else { | |
| 324 usingClientCompiler = true; | |
| 325 } | |
| 326 } | |
| 327 } | |
| 328 | |
| 329 useTLAB = (db.lookupIntConstant("UseTLAB").intValue() != 0); | |
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330 enableInvokeDynamic = (db.lookupIntConstant("EnableInvokeDynamic").intValue() != 0); |
| 0 | 331 |
| 332 if (debugger != null) { | |
| 333 isLP64 = debugger.getMachineDescription().isLP64(); | |
| 334 } | |
| 335 bytesPerLong = db.lookupIntConstant("BytesPerLong").intValue(); | |
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336 bytesPerWord = db.lookupIntConstant("BytesPerWord").intValue(); |
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337 heapWordSize = db.lookupIntConstant("HeapWordSize").intValue(); |
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338 oopSize = db.lookupIntConstant("oopSize").intValue(); |
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339 |
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340 intxType = db.lookupType("intx"); |
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341 uintxType = db.lookupType("uintx"); |
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342 boolType = (CIntegerType) db.lookupType("bool"); |
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343 |
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344 minObjAlignmentInBytes = getObjectAlignmentInBytes(); |
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345 if (minObjAlignmentInBytes == 8) { |
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346 logMinObjAlignmentInBytes = 3; |
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347 } else if (minObjAlignmentInBytes == 16) { |
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348 logMinObjAlignmentInBytes = 4; |
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349 } else { |
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350 throw new RuntimeException("Object alignment " + minObjAlignmentInBytes + " not yet supported"); |
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351 } |
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352 |
| 749 | 353 if (isCompressedOopsEnabled()) { |
| 354 // Size info for oops within java objects is fixed | |
| 355 heapOopSize = (int)getIntSize(); | |
| 356 } else { | |
| 357 heapOopSize = (int)getOopSize(); | |
| 358 } | |
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359 |
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360 if (isCompressedKlassPointersEnabled()) { |
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361 klassPtrSize = (int)getIntSize(); |
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362 } else { |
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363 klassPtrSize = (int)getOopSize(); // same as an oop |
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364 } |
| 0 | 365 } |
| 366 | |
| 367 /** This could be used by a reflective runtime system */ | |
| 368 public static void initialize(TypeDataBase db, boolean isBigEndian) { | |
| 369 if (soleInstance != null) { | |
| 370 throw new RuntimeException("Attempt to initialize VM twice"); | |
| 371 } | |
| 372 soleInstance = new VM(db, null, isBigEndian); | |
| 373 for (Iterator iter = vmInitializedObservers.iterator(); iter.hasNext(); ) { | |
| 374 ((Observer) iter.next()).update(null, null); | |
| 375 } | |
| 376 } | |
| 377 | |
| 378 /** This is used by the debugging system */ | |
| 379 public static void initialize(TypeDataBase db, JVMDebugger debugger) { | |
| 380 if (soleInstance != null) { | |
| 381 throw new RuntimeException("Attempt to initialize VM twice"); | |
| 382 } | |
| 383 soleInstance = new VM(db, debugger, debugger.getMachineDescription().isBigEndian()); | |
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384 |
| 0 | 385 for (Iterator iter = vmInitializedObservers.iterator(); iter.hasNext(); ) { |
| 386 ((Observer) iter.next()).update(null, null); | |
| 387 } | |
| 650 | 388 |
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389 debugger.putHeapConst(soleInstance.getHeapOopSize(), soleInstance.getKlassPtrSize(), |
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390 Universe.getNarrowOopBase(), Universe.getNarrowOopShift(), |
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391 Universe.getNarrowKlassBase(), Universe.getNarrowKlassShift()); |
| 0 | 392 } |
| 393 | |
| 394 /** This is used by the debugging system */ | |
| 395 public static void shutdown() { | |
| 396 soleInstance = null; | |
| 397 } | |
| 398 | |
| 399 /** This is used by both the debugger and any runtime system. It is | |
| 400 the basic mechanism by which classes which mimic underlying VM | |
| 401 functionality cause themselves to be initialized. The given | |
| 402 observer will be notified (with arguments (null, null)) when the | |
| 403 VM is re-initialized, as well as when it registers itself with | |
| 404 the VM. */ | |
| 405 public static void registerVMInitializedObserver(Observer o) { | |
| 406 vmInitializedObservers.add(o); | |
| 407 o.update(null, null); | |
| 408 } | |
| 409 | |
| 410 /** This is the primary accessor used by both the debugger and any | |
| 411 potential runtime system */ | |
| 412 public static VM getVM() { | |
| 413 if (soleInstance == null) { | |
| 414 throw new RuntimeException("VM.initialize() was not yet called"); | |
| 415 } | |
| 416 return soleInstance; | |
| 417 } | |
| 418 | |
| 419 /** This is only used by the debugging system. The given observer | |
| 420 will be notified if the underlying VM resumes execution. NOTE | |
| 421 that the given observer is not triggered if the VM is currently | |
| 422 running and therefore differs in behavior from {@link | |
| 423 #registerVMInitializedObserver} (because of the possibility of | |
| 424 race conditions if the observer is added while the VM is being | |
| 425 suspended or resumed). */ | |
| 426 public void registerVMResumedObserver(Observer o) { | |
| 427 vmResumedObservers.add(o); | |
| 428 } | |
| 429 | |
| 430 /** This is only used by the debugging system. The given observer | |
| 431 will be notified if the underlying VM suspends execution. NOTE | |
| 432 that the given observer is not triggered if the VM is currently | |
| 433 suspended and therefore differs in behavior from {@link | |
| 434 #registerVMInitializedObserver} (because of the possibility of | |
| 435 race conditions if the observer is added while the VM is being | |
| 436 suspended or resumed). */ | |
| 437 public void registerVMSuspendedObserver(Observer o) { | |
| 438 vmSuspendedObservers.add(o); | |
| 439 } | |
| 440 | |
| 441 /** This is only used by the debugging system. Informs all | |
| 442 registered resumption observers that the VM has been resumed. | |
| 443 The application is responsible for actually having performed the | |
| 444 resumption. No OopHandles must be used after this point, as they | |
| 445 may move in the target address space due to garbage | |
| 446 collection. */ | |
| 447 public void fireVMResumed() { | |
| 448 for (Iterator iter = vmResumedObservers.iterator(); iter.hasNext(); ) { | |
| 449 ((Observer) iter.next()).update(null, null); | |
| 450 } | |
| 451 } | |
| 452 | |
| 453 /** This is only used by the debugging system. Informs all | |
| 454 registered suspension observers that the VM has been suspended. | |
| 455 The application is responsible for actually having performed the | |
| 456 suspension. Garbage collection must be forbidden at this point; | |
| 457 for example, a JPDA-level suspension is not adequate since the | |
| 458 VM thread may still be running. */ | |
| 459 public void fireVMSuspended() { | |
| 460 for (Iterator iter = vmSuspendedObservers.iterator(); iter.hasNext(); ) { | |
| 461 ((Observer) iter.next()).update(null, null); | |
| 462 } | |
| 463 } | |
| 464 | |
| 465 /** Returns the OS this VM is running on. Notice that by delegating | |
| 466 to the debugger we can transparently support remote | |
| 467 debugging. */ | |
| 468 public String getOS() { | |
| 469 if (debugger != null) { | |
| 470 return debugger.getOS(); | |
| 471 } | |
| 472 return PlatformInfo.getOS(); | |
| 473 } | |
| 474 | |
| 475 /** Returns the CPU this VM is running on. Notice that by delegating | |
| 476 to the debugger we can transparently support remote | |
| 477 debugging. */ | |
| 478 public String getCPU() { | |
| 479 if (debugger != null) { | |
| 480 return debugger.getCPU(); | |
| 481 } | |
| 482 return PlatformInfo.getCPU(); | |
| 483 } | |
| 484 | |
| 485 public Type lookupType(String cTypeName) { | |
| 486 return db.lookupType(cTypeName); | |
| 487 } | |
| 488 | |
| 489 public Integer lookupIntConstant(String name) { | |
| 490 return db.lookupIntConstant(name); | |
| 491 } | |
| 492 | |
| 6782 | 493 // Convenience function for conversions |
| 494 static public long getAddressValue(Address addr) { | |
| 495 return VM.getVM().getDebugger().getAddressValue(addr); | |
| 496 } | |
| 497 | |
| 0 | 498 public long getAddressSize() { |
| 499 return db.getAddressSize(); | |
| 500 } | |
| 501 | |
| 502 public long getOopSize() { | |
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503 return oopSize; |
| 0 | 504 } |
| 505 | |
| 506 public long getLogAddressSize() { | |
| 507 return logAddressSize; | |
| 508 } | |
| 509 | |
|
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510 public long getIntSize() { |
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511 return db.getJIntType().getSize(); |
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512 } |
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513 |
| 0 | 514 /** NOTE: this offset is in BYTES in this system! */ |
| 515 public long getStackBias() { | |
| 516 return stackBias; | |
| 517 } | |
| 518 | |
| 519 /** Indicates whether the underlying machine supports the LP64 data | |
| 520 model. This is needed for conditionalizing code in a few places */ | |
| 521 public boolean isLP64() { | |
| 522 if (Assert.ASSERTS_ENABLED) { | |
| 523 Assert.that(isDebugging(), "Debugging system only for now"); | |
| 524 } | |
| 525 return isLP64; | |
| 526 } | |
| 527 | |
| 528 /** Get bytes-per-long == long/double natural alignment. */ | |
| 529 public int getBytesPerLong() { | |
| 530 return bytesPerLong; | |
| 531 } | |
| 532 | |
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533 public int getBytesPerWord() { |
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534 return bytesPerWord; |
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535 } |
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536 |
| 0 | 537 /** Get minimum object alignment in bytes. */ |
| 538 public int getMinObjAlignmentInBytes() { | |
| 539 return minObjAlignmentInBytes; | |
| 540 } | |
|
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541 public int getLogMinObjAlignmentInBytes() { |
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542 return logMinObjAlignmentInBytes; |
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543 } |
| 0 | 544 |
|
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545 public int getHeapWordSize() { |
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546 return heapWordSize; |
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547 } |
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548 |
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549 public int getHeapOopSize() { |
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550 return heapOopSize; |
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551 } |
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552 |
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553 public int getKlassPtrSize() { |
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554 return klassPtrSize; |
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555 } |
| 0 | 556 /** Utility routine for getting data structure alignment correct */ |
| 557 public long alignUp(long size, long alignment) { | |
| 558 return (size + alignment - 1) & ~(alignment - 1); | |
| 559 } | |
| 560 | |
| 561 /** Utility routine for getting data structure alignment correct */ | |
| 562 public long alignDown(long size, long alignment) { | |
| 563 return size & ~(alignment - 1); | |
| 564 } | |
| 565 | |
| 566 /** Utility routine for building an int from two "unsigned" 16-bit | |
| 567 shorts */ | |
| 568 public int buildIntFromShorts(short low, short high) { | |
| 569 return (((int) high) << 16) | (((int) low) & 0xFFFF); | |
| 570 } | |
| 571 | |
| 572 /** Utility routine for building a long from two "unsigned" 32-bit | |
| 573 ints in <b>platform-dependent</b> order */ | |
| 574 public long buildLongFromIntsPD(int oneHalf, int otherHalf) { | |
| 575 if (isBigEndian) { | |
| 576 return (((long) otherHalf) << 32) | (((long) oneHalf) & 0x00000000FFFFFFFFL); | |
| 577 } else{ | |
| 578 return (((long) oneHalf) << 32) | (((long) otherHalf) & 0x00000000FFFFFFFFL); | |
| 579 } | |
| 580 } | |
| 581 | |
| 582 /** Indicates whether Thread-Local Allocation Buffers are used */ | |
| 583 public boolean getUseTLAB() { | |
| 584 return useTLAB; | |
| 585 } | |
| 586 | |
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587 public boolean getEnableInvokeDynamic() { |
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588 return enableInvokeDynamic; |
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589 } |
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590 |
| 0 | 591 public TypeDataBase getTypeDataBase() { |
| 592 return db; | |
| 593 } | |
| 594 | |
| 595 public Universe getUniverse() { | |
| 596 if (universe == null) { | |
| 597 universe = new Universe(); | |
| 598 } | |
| 599 return universe; | |
| 600 } | |
| 601 | |
| 602 public ObjectHeap getObjectHeap() { | |
| 603 if (heap == null) { | |
| 604 heap = new ObjectHeap(db); | |
| 605 } | |
| 606 return heap; | |
| 607 } | |
| 608 | |
| 609 public SymbolTable getSymbolTable() { | |
| 610 if (symbols == null) { | |
| 611 symbols = SymbolTable.getTheTable(); | |
| 612 } | |
| 613 return symbols; | |
| 614 } | |
| 615 | |
| 616 public StringTable getStringTable() { | |
| 617 if (strings == null) { | |
| 618 strings = StringTable.getTheTable(); | |
| 619 } | |
| 620 return strings; | |
| 621 } | |
| 622 | |
| 623 public SystemDictionary getSystemDictionary() { | |
| 624 if (dict == null) { | |
| 625 dict = new SystemDictionary(); | |
| 626 } | |
| 627 return dict; | |
| 628 } | |
| 629 | |
| 630 public Threads getThreads() { | |
| 631 if (threads == null) { | |
| 632 threads = new Threads(); | |
| 633 } | |
| 634 return threads; | |
| 635 } | |
| 636 | |
| 637 public ObjectSynchronizer getObjectSynchronizer() { | |
| 638 if (synchronizer == null) { | |
| 639 synchronizer = new ObjectSynchronizer(); | |
| 640 } | |
| 641 return synchronizer; | |
| 642 } | |
| 643 | |
| 644 public JNIHandles getJNIHandles() { | |
| 645 if (handles == null) { | |
| 646 handles = new JNIHandles(); | |
| 647 } | |
| 648 return handles; | |
| 649 } | |
| 650 | |
| 651 public Interpreter getInterpreter() { | |
| 652 if (interpreter == null) { | |
| 653 interpreter = new Interpreter(); | |
| 654 } | |
| 655 return interpreter; | |
| 656 } | |
| 657 | |
| 658 public StubRoutines getStubRoutines() { | |
| 659 if (stubRoutines == null) { | |
| 660 stubRoutines = new StubRoutines(); | |
| 661 } | |
| 662 return stubRoutines; | |
| 663 } | |
| 664 | |
| 665 public VMRegImpl getVMRegImplInfo() { | |
| 666 if (vmregImpl == null) { | |
| 667 vmregImpl = new VMRegImpl(); | |
| 668 } | |
| 669 return vmregImpl; | |
| 670 } | |
| 671 | |
| 672 public Bytes getBytes() { | |
| 673 if (bytes == null) { | |
| 674 bytes = new Bytes(debugger.getMachineDescription()); | |
| 675 } | |
| 676 return bytes; | |
| 677 } | |
| 678 | |
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679 /** Returns true if this is a isBigEndian, false otherwise */ |
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680 public boolean isBigEndian() { |
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681 return isBigEndian; |
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682 } |
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683 |
| 0 | 684 /** Returns true if this is a "core" build, false if either C1 or C2 |
| 685 is present */ | |
| 686 public boolean isCore() { | |
| 687 return (!(usingClientCompiler || usingServerCompiler)); | |
| 688 } | |
| 689 | |
| 690 /** Returns true if this is a C1 build, false otherwise */ | |
| 691 public boolean isClientCompiler() { | |
| 692 return usingClientCompiler; | |
| 693 } | |
| 694 | |
| 695 /** Returns true if this is a C2 build, false otherwise */ | |
| 696 public boolean isServerCompiler() { | |
| 697 return usingServerCompiler; | |
| 698 } | |
| 699 | |
| 700 /** Returns true if C2 derived pointer table should be used, false otherwise */ | |
| 701 public boolean useDerivedPointerTable() { | |
| 702 return !disableDerivedPrinterTableCheck; | |
| 703 } | |
| 704 | |
| 705 /** Returns the code cache; should not be used if is core build */ | |
| 706 public CodeCache getCodeCache() { | |
| 707 if (Assert.ASSERTS_ENABLED) { | |
| 708 Assert.that(!isCore(), "noncore builds only"); | |
| 709 } | |
| 710 if (codeCache == null) { | |
| 711 codeCache = new CodeCache(); | |
| 712 } | |
| 713 return codeCache; | |
| 714 } | |
| 715 | |
| 716 /** Should only be called for C1 builds */ | |
| 717 public Runtime1 getRuntime1() { | |
| 718 if (Assert.ASSERTS_ENABLED) { | |
| 719 Assert.that(isClientCompiler(), "C1 builds only"); | |
| 720 } | |
| 721 if (runtime1 == null) { | |
| 722 runtime1 = new Runtime1(); | |
| 723 } | |
| 724 return runtime1; | |
| 725 } | |
| 726 | |
| 727 /** Test to see whether we're in debugging mode (NOTE: this really | |
| 728 should not be tested by this code; currently only used in | |
| 729 StackFrameStream) */ | |
| 730 public boolean isDebugging() { | |
| 731 return (debugger != null); | |
| 732 } | |
| 733 | |
| 734 /** This is only used by the debugging (i.e., non-runtime) system */ | |
| 735 public JVMDebugger getDebugger() { | |
| 736 if (debugger == null) { | |
| 737 throw new RuntimeException("Attempt to use debugger in runtime system"); | |
| 738 } | |
| 739 return debugger; | |
| 740 } | |
| 741 | |
| 742 /** Indicates whether a given program counter is in Java code. This | |
| 743 includes but is not spanned by the interpreter and code cache. | |
| 744 Only used in the debugging system, for implementing | |
| 745 JavaThread.currentFrameGuess() on x86. */ | |
| 746 public boolean isJavaPCDbg(Address addr) { | |
| 747 // FIXME: this is not a complete enough set: must include areas | |
| 748 // like vtable stubs | |
| 749 return (getInterpreter().contains(addr) || | |
| 750 getCodeCache().contains(addr)); | |
| 751 } | |
| 752 | |
| 753 /** FIXME: figure out where to stick this */ | |
| 754 public int getInvocationEntryBCI() { | |
| 755 return invocationEntryBCI; | |
| 756 } | |
| 757 | |
| 758 /** FIXME: figure out where to stick this */ | |
| 759 public int getInvalidOSREntryBCI() { | |
| 760 return invalidOSREntryBCI; | |
| 761 } | |
| 762 | |
| 763 // FIXME: figure out where to stick this | |
| 764 public boolean wizardMode() { | |
| 765 return true; | |
| 766 } | |
| 767 | |
| 768 public ReversePtrs getRevPtrs() { | |
| 769 return revPtrs; | |
| 770 } | |
| 771 | |
| 772 public void setRevPtrs(ReversePtrs rp) { | |
| 773 revPtrs = rp; | |
| 774 } | |
| 775 | |
| 776 // returns null, if not available. | |
| 777 public String getVMRelease() { | |
| 778 return vmRelease; | |
| 779 } | |
| 780 | |
| 781 // returns null, if not available. | |
| 782 public String getVMInternalInfo() { | |
| 783 return vmInternalInfo; | |
| 784 } | |
| 785 | |
|
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786 public int getReserveForAllocationPrefetch() { |
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787 return reserveForAllocationPrefetch; |
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788 } |
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789 |
| 0 | 790 public boolean isSharingEnabled() { |
| 791 if (sharingEnabled == null) { | |
| 792 Flag flag = getCommandLineFlag("UseSharedSpaces"); | |
| 793 sharingEnabled = (flag == null)? Boolean.FALSE : | |
| 794 (flag.getBool()? Boolean.TRUE: Boolean.FALSE); | |
| 795 } | |
| 796 return sharingEnabled.booleanValue(); | |
| 797 } | |
| 798 | |
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799 public boolean isCompressedOopsEnabled() { |
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800 if (compressedOopsEnabled == null) { |
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801 Flag flag = getCommandLineFlag("UseCompressedOops"); |
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802 compressedOopsEnabled = (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 compressedOopsEnabled.booleanValue(); |
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806 } |
| 0 | 807 |
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808 public boolean isCompressedKlassPointersEnabled() { |
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809 if (compressedKlassPointersEnabled == null) { |
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810 Flag flag = getCommandLineFlag("UseCompressedKlassPointers"); |
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811 compressedKlassPointersEnabled = (flag == null) ? Boolean.FALSE: |
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812 (flag.getBool()? Boolean.TRUE: Boolean.FALSE); |
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813 } |
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814 return compressedKlassPointersEnabled.booleanValue(); |
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815 } |
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816 |
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817 public int getObjectAlignmentInBytes() { |
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818 if (objectAlignmentInBytes == 0) { |
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819 Flag flag = getCommandLineFlag("ObjectAlignmentInBytes"); |
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820 objectAlignmentInBytes = (flag == null) ? 8 : (int)flag.getIntx(); |
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821 } |
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822 return objectAlignmentInBytes; |
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823 } |
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824 |
| 0 | 825 // returns null, if not available. |
| 826 public Flag[] getCommandLineFlags() { | |
| 827 if (commandLineFlags == null) { | |
| 828 readCommandLineFlags(); | |
| 829 } | |
| 830 | |
| 831 return commandLineFlags; | |
| 832 } | |
| 833 | |
| 834 public Flag getCommandLineFlag(String name) { | |
| 835 if (flagsMap == null) { | |
| 836 flagsMap = new HashMap(); | |
| 837 Flag[] flags = getCommandLineFlags(); | |
| 838 for (int i = 0; i < flags.length; i++) { | |
| 839 flagsMap.put(flags[i].getName(), flags[i]); | |
| 840 } | |
| 841 } | |
| 842 return (Flag) flagsMap.get(name); | |
| 843 } | |
| 844 | |
| 845 private void readCommandLineFlags() { | |
| 846 // get command line flags | |
| 847 TypeDataBase db = getTypeDataBase(); | |
| 3939 | 848 Type flagType = db.lookupType("Flag"); |
| 849 int numFlags = (int) flagType.getCIntegerField("numFlags").getValue(); | |
| 850 // NOTE: last flag contains null values. | |
| 851 commandLineFlags = new Flag[numFlags - 1]; | |
| 852 | |
| 853 Address flagAddr = flagType.getAddressField("flags").getValue(); | |
| 0 | 854 |
| 3939 | 855 AddressField typeFld = flagType.getAddressField("type"); |
| 856 AddressField nameFld = flagType.getAddressField("name"); | |
| 857 AddressField addrFld = flagType.getAddressField("addr"); | |
| 858 AddressField kindFld = flagType.getAddressField("kind"); | |
| 859 CIntField originFld = new CIntField(flagType.getCIntegerField("origin"), 0); | |
| 0 | 860 |
| 3939 | 861 long flagSize = flagType.getSize(); // sizeof(Flag) |
| 0 | 862 |
| 3939 | 863 // NOTE: last flag contains null values. |
| 864 for (int f = 0; f < numFlags - 1; f++) { | |
| 865 String type = CStringUtilities.getString(typeFld.getValue(flagAddr)); | |
| 866 String name = CStringUtilities.getString(nameFld.getValue(flagAddr)); | |
| 867 Address addr = addrFld.getValue(flagAddr); | |
| 868 String kind = CStringUtilities.getString(kindFld.getValue(flagAddr)); | |
| 869 int origin = (int)originFld.getValue(flagAddr); | |
| 870 commandLineFlags[f] = new Flag(type, name, addr, kind, origin); | |
| 871 flagAddr = flagAddr.addOffsetTo(flagSize); | |
| 872 } | |
| 0 | 873 |
| 3939 | 874 // sort flags by name |
| 875 Arrays.sort(commandLineFlags, new Comparator() { | |
| 876 public int compare(Object o1, Object o2) { | |
| 877 Flag f1 = (Flag) o1; | |
| 878 Flag f2 = (Flag) o2; | |
| 879 return f1.getName().compareTo(f2.getName()); | |
| 880 } | |
| 881 }); | |
| 0 | 882 } |
| 883 | |
| 884 public String getSystemProperty(String key) { | |
| 885 Properties props = getSystemProperties(); | |
| 886 return (props != null)? props.getProperty(key) : null; | |
| 887 } | |
| 888 | |
| 889 public Properties getSystemProperties() { | |
| 890 if (sysProps == null) { | |
| 891 readSystemProperties(); | |
| 892 } | |
| 893 return sysProps; | |
| 894 } | |
| 895 | |
| 896 private void readSystemProperties() { | |
|
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897 final InstanceKlass systemKls = getSystemDictionary().getSystemKlass(); |
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898 systemKls.iterateStaticFields(new DefaultOopVisitor() { |
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899 ObjectReader objReader = new ObjectReader(); |
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900 public void doOop(sun.jvm.hotspot.oops.OopField field, boolean isVMField) { |
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901 if (field.getID().getName().equals("props")) { |
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902 try { |
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903 sysProps = (Properties) objReader.readObject(field.getValue(getObj())); |
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904 } catch (Exception e) { |
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905 e.printStackTrace(); |
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906 } |
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907 } |
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908 } |
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909 }); |
| 0 | 910 } |
| 911 } |