Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/code/NMethod.java @ 1040:873ec3787992
6892186: SA does not dump debug info for scalar replaced objects
Summary: Implement scalar replaced objects debug info dump in SA.
Reviewed-by: twisti
| author | kvn |
|---|---|
| date | Wed, 21 Oct 2009 09:15:33 -0700 |
| parents | 148e5441d916 |
| children | c18cbe5936b8 1a5913bf5e19 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright 2000-2009 Sun Microsystems, Inc. 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 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.code; | |
| 26 | |
| 27 import java.io.*; | |
| 28 import java.util.*; | |
| 29 import sun.jvm.hotspot.debugger.*; | |
| 30 import sun.jvm.hotspot.memory.*; | |
| 31 import sun.jvm.hotspot.oops.*; | |
| 32 import sun.jvm.hotspot.runtime.*; | |
| 33 import sun.jvm.hotspot.types.*; | |
| 34 import sun.jvm.hotspot.utilities.*; | |
| 35 | |
| 36 public class NMethod extends CodeBlob { | |
| 37 private static long pcDescSize; | |
| 38 private static CIntegerField zombieInstructionSizeField; | |
| 39 private static sun.jvm.hotspot.types.OopField methodField; | |
| 40 /** != InvocationEntryBci if this nmethod is an on-stack replacement method */ | |
| 41 private static CIntegerField entryBCIField; | |
| 42 /** To support simple linked-list chaining of nmethods */ | |
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43 private static AddressField osrLinkField; |
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44 private static AddressField scavengeRootLinkField; |
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45 private static JByteField scavengeRootStateField; |
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46 |
| 0 | 47 /** Offsets for different nmethod parts */ |
| 48 private static CIntegerField exceptionOffsetField; | |
| 49 private static CIntegerField deoptOffsetField; | |
| 50 private static CIntegerField origPCOffsetField; | |
| 51 private static CIntegerField stubOffsetField; | |
| 52 private static CIntegerField scopesDataOffsetField; | |
| 53 private static CIntegerField scopesPCsOffsetField; | |
| 54 private static CIntegerField dependenciesOffsetField; | |
| 55 private static CIntegerField handlerTableOffsetField; | |
| 56 private static CIntegerField nulChkTableOffsetField; | |
| 57 private static CIntegerField nmethodEndOffsetField; | |
| 58 | |
| 59 /** Offsets for entry points */ | |
| 60 /** Entry point with class check */ | |
| 61 private static AddressField entryPointField; | |
| 62 /** Entry point without class check */ | |
| 63 private static AddressField verifiedEntryPointField; | |
| 64 /** Entry point for on stack replacement */ | |
| 65 private static AddressField osrEntryPointField; | |
| 66 | |
| 67 // FIXME: add access to flags (how?) | |
| 68 | |
| 69 /** NMethod Flushing lock (if non-zero, then the nmethod is not removed) */ | |
| 70 private static JIntField lockCountField; | |
| 71 | |
| 72 /** not_entrant method removal. Each mark_sweep pass will update | |
| 73 this mark to current sweep invocation count if it is seen on the | |
| 74 stack. An not_entrant method can be removed when there is no | |
| 75 more activations, i.e., when the _stack_traversal_mark is less than | |
| 76 current sweep traversal index. */ | |
| 77 private static CIntegerField stackTraversalMarkField; | |
| 78 | |
| 79 static { | |
| 80 VM.registerVMInitializedObserver(new Observer() { | |
| 81 public void update(Observable o, Object data) { | |
| 82 initialize(VM.getVM().getTypeDataBase()); | |
| 83 } | |
| 84 }); | |
| 85 } | |
| 86 | |
| 87 private static void initialize(TypeDataBase db) { | |
| 88 Type type = db.lookupType("nmethod"); | |
| 89 | |
| 90 zombieInstructionSizeField = type.getCIntegerField("_zombie_instruction_size"); | |
| 91 methodField = type.getOopField("_method"); | |
| 92 entryBCIField = type.getCIntegerField("_entry_bci"); | |
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93 osrLinkField = type.getAddressField("_osr_link"); |
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94 scavengeRootLinkField = type.getAddressField("_scavenge_root_link"); |
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95 scavengeRootStateField = type.getJByteField("_scavenge_root_state"); |
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96 |
| 0 | 97 exceptionOffsetField = type.getCIntegerField("_exception_offset"); |
| 98 deoptOffsetField = type.getCIntegerField("_deoptimize_offset"); | |
| 99 origPCOffsetField = type.getCIntegerField("_orig_pc_offset"); | |
| 100 stubOffsetField = type.getCIntegerField("_stub_offset"); | |
| 101 scopesDataOffsetField = type.getCIntegerField("_scopes_data_offset"); | |
| 102 scopesPCsOffsetField = type.getCIntegerField("_scopes_pcs_offset"); | |
| 103 dependenciesOffsetField = type.getCIntegerField("_dependencies_offset"); | |
| 104 handlerTableOffsetField = type.getCIntegerField("_handler_table_offset"); | |
| 105 nulChkTableOffsetField = type.getCIntegerField("_nul_chk_table_offset"); | |
| 106 nmethodEndOffsetField = type.getCIntegerField("_nmethod_end_offset"); | |
| 107 entryPointField = type.getAddressField("_entry_point"); | |
| 108 verifiedEntryPointField = type.getAddressField("_verified_entry_point"); | |
| 109 osrEntryPointField = type.getAddressField("_osr_entry_point"); | |
| 110 lockCountField = type.getJIntField("_lock_count"); | |
| 111 stackTraversalMarkField = type.getCIntegerField("_stack_traversal_mark"); | |
| 112 | |
| 113 pcDescSize = db.lookupType("PcDesc").getSize(); | |
| 114 } | |
| 115 | |
| 116 public NMethod(Address addr) { | |
| 117 super(addr); | |
| 118 } | |
| 119 | |
| 120 | |
| 121 // Accessors | |
| 122 public Address getAddress() { | |
| 123 return addr; | |
| 124 } | |
| 125 | |
| 126 public Method getMethod() { | |
| 127 return (Method) VM.getVM().getObjectHeap().newOop(methodField.getValue(addr)); | |
| 128 } | |
| 129 | |
| 130 // Type info | |
| 131 public boolean isNMethod() { return true; } | |
| 132 public boolean isJavaMethod() { return !getMethod().isNative(); } | |
| 133 public boolean isNativeMethod() { return getMethod().isNative(); } | |
| 134 public boolean isOSRMethod() { return getEntryBCI() != VM.getVM().getInvocationEntryBCI(); } | |
| 135 | |
| 136 /** Boundaries for different parts */ | |
| 137 public Address constantsBegin() { return instructionsBegin(); } | |
| 138 public Address constantsEnd() { return getEntryPoint(); } | |
| 139 public Address codeBegin() { return getEntryPoint(); } | |
| 140 public Address codeEnd() { return headerBegin().addOffsetTo(getStubOffset()); } | |
| 141 public Address exceptionBegin() { return headerBegin().addOffsetTo(getExceptionOffset()); } | |
| 142 public Address deoptBegin() { return headerBegin().addOffsetTo(getDeoptOffset()); } | |
| 143 public Address stubBegin() { return headerBegin().addOffsetTo(getStubOffset()); } | |
| 144 public Address stubEnd() { return headerBegin().addOffsetTo(getScopesDataOffset()); } | |
| 145 public Address scopesDataBegin() { return headerBegin().addOffsetTo(getScopesDataOffset()); } | |
| 146 public Address scopesDataEnd() { return headerBegin().addOffsetTo(getScopesPCsOffset()); } | |
| 147 public Address scopesPCsBegin() { return headerBegin().addOffsetTo(getScopesPCsOffset()); } | |
| 148 public Address scopesPCsEnd() { return headerBegin().addOffsetTo(getDependenciesOffset()); } | |
| 149 public Address dependenciesBegin() { return headerBegin().addOffsetTo(getDependenciesOffset()); } | |
| 150 public Address dependenciesEnd() { return headerBegin().addOffsetTo(getHandlerTableOffset()); } | |
| 151 public Address handlerTableBegin() { return headerBegin().addOffsetTo(getHandlerTableOffset()); } | |
| 152 public Address handlerTableEnd() { return headerBegin().addOffsetTo(getNulChkTableOffset()); } | |
| 153 public Address nulChkTableBegin() { return headerBegin().addOffsetTo(getNulChkTableOffset()); } | |
| 154 public Address nulChkTableEnd() { return headerBegin().addOffsetTo(getNMethodEndOffset()); } | |
| 155 | |
| 156 public int constantsSize() { return (int) constantsEnd() .minus(constantsBegin()); } | |
| 157 public int codeSize() { return (int) codeEnd() .minus(codeBegin()); } | |
| 158 public int stubSize() { return (int) stubEnd() .minus(stubBegin()); } | |
| 159 public int scopesDataSize() { return (int) scopesDataEnd() .minus(scopesDataBegin()); } | |
| 160 public int scopesPCsSize() { return (int) scopesPCsEnd() .minus(scopesPCsBegin()); } | |
| 161 public int dependenciesSize() { return (int) dependenciesEnd().minus(dependenciesBegin()); } | |
| 162 public int handlerTableSize() { return (int) handlerTableEnd().minus(handlerTableBegin()); } | |
| 163 public int nulChkTableSize() { return (int) nulChkTableEnd() .minus(nulChkTableBegin()); } | |
| 164 public int origPCOffset() { return (int) origPCOffsetField.getValue(addr); } | |
| 165 | |
| 166 public int totalSize() { | |
| 167 return | |
| 168 constantsSize() + | |
| 169 codeSize() + | |
| 170 stubSize() + | |
| 171 scopesDataSize() + | |
| 172 scopesPCsSize() + | |
| 173 dependenciesSize() + | |
| 174 handlerTableSize() + | |
| 175 nulChkTableSize(); | |
| 176 } | |
| 177 | |
| 178 public boolean constantsContains (Address addr) { return constantsBegin() .lessThanOrEqual(addr) && constantsEnd() .greaterThan(addr); } | |
| 179 public boolean codeContains (Address addr) { return codeBegin() .lessThanOrEqual(addr) && codeEnd() .greaterThan(addr); } | |
| 180 public boolean stubContains (Address addr) { return stubBegin() .lessThanOrEqual(addr) && stubEnd() .greaterThan(addr); } | |
| 181 public boolean scopesDataContains (Address addr) { return scopesDataBegin() .lessThanOrEqual(addr) && scopesDataEnd() .greaterThan(addr); } | |
| 182 public boolean scopesPCsContains (Address addr) { return scopesPCsBegin() .lessThanOrEqual(addr) && scopesPCsEnd() .greaterThan(addr); } | |
| 183 public boolean handlerTableContains(Address addr) { return handlerTableBegin().lessThanOrEqual(addr) && handlerTableEnd().greaterThan(addr); } | |
| 184 public boolean nulChkTableContains (Address addr) { return nulChkTableBegin() .lessThanOrEqual(addr) && nulChkTableEnd() .greaterThan(addr); } | |
| 185 | |
| 186 /** Entry points */ | |
| 187 public Address getEntryPoint() { return entryPointField.getValue(addr); } | |
| 188 public Address getVerifiedEntryPoint() { return verifiedEntryPointField.getValue(addr); } | |
| 189 | |
| 190 // FIXME: add interpreter_entry_point() | |
| 191 // FIXME: add lazy_interpreter_entry_point() for C2 | |
| 192 | |
| 193 // ********** | |
| 194 // * FIXME: * ADD ACCESS TO FLAGS!!!! | |
| 195 // ********** | |
| 196 // public boolean isInUse(); | |
| 197 // public boolean isAlive(); | |
| 198 // public boolean isNotEntrant(); | |
| 199 // public boolean isZombie(); | |
| 200 | |
| 201 // ******************************** | |
| 202 // * MAJOR FIXME: MAJOR HACK HERE * | |
| 203 // ******************************** | |
| 204 public boolean isZombie() { return false; } | |
| 205 | |
| 206 // public boolean isUnloaded(); | |
| 207 // public boolean isYoung(); | |
| 208 // public boolean isOld(); | |
| 209 // public int age(); | |
| 210 // public boolean isMarkedForDeoptimization(); | |
| 211 // public boolean isMarkedForUnloading(); | |
| 212 // public boolean isMarkedForReclamation(); | |
| 213 // public int level(); | |
| 214 // public int version(); | |
| 215 | |
| 216 // FIXME: add mutators for above | |
| 217 // FIXME: add exception cache access? | |
| 218 | |
| 219 /** On-stack replacement support */ | |
| 220 // FIXME: add mutators | |
| 221 public int getOSREntryBCI() { | |
| 222 if (Assert.ASSERTS_ENABLED) { | |
| 223 Assert.that(getEntryBCI() != VM.getVM().getInvocationEntryBCI(), "wrong kind of nmethod"); | |
| 224 } | |
| 225 return getEntryBCI(); | |
| 226 } | |
| 227 | |
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228 public NMethod getOSRLink() { |
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229 return (NMethod) VMObjectFactory.newObject(NMethod.class, osrLinkField.getValue(addr)); |
| 0 | 230 } |
| 231 | |
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232 public NMethod getScavengeRootLink() { |
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233 return (NMethod) VMObjectFactory.newObject(NMethod.class, scavengeRootLinkField.getValue(addr)); |
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234 } |
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235 |
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236 public int getScavengeRootState() { |
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237 return (int) scavengeRootStateField.getValue(addr); |
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238 } |
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239 |
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240 |
| 0 | 241 /** Tells whether frames described by this nmethod can be |
| 242 deoptimized. Note: native wrappers cannot be deoptimized. */ | |
| 243 public boolean canBeDeoptimized() { return isJavaMethod(); } | |
| 244 | |
| 245 // FIXME: add inline cache support | |
| 246 // FIXME: add flush() | |
| 247 | |
| 248 public boolean isLockedByVM() { return lockCountField.getValue(addr) > 0; } | |
| 249 | |
| 250 // FIXME: add mark_as_seen_on_stack | |
| 251 // FIXME: add can_not_entrant_be_converted | |
| 252 | |
| 253 // FIXME: add GC support | |
| 254 // void follow_roots_or_mark_for_unloading(bool unloading_occurred, bool& marked_for_unloading); | |
| 255 // void follow_root_or_mark_for_unloading(oop* root, bool unloading_occurred, bool& marked_for_unloading); | |
| 256 // void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, void f(oop*)); | |
| 257 // void adjust_pointers(); | |
| 258 | |
| 259 /** Finds a PCDesc with real-pc equal to "pc" */ | |
| 260 public PCDesc getPCDescAt(Address pc) { | |
| 261 // FIXME: consider adding cache like the one down in the VM | |
| 262 for (Address p = scopesPCsBegin(); p.lessThan(scopesPCsEnd()); p = p.addOffsetTo(pcDescSize)) { | |
| 263 PCDesc pcDesc = new PCDesc(p); | |
| 264 if (pcDesc.getRealPC(this).equals(pc)) { | |
| 265 return pcDesc; | |
| 266 } | |
| 267 } | |
| 268 return null; | |
| 269 } | |
| 270 | |
| 271 /** ScopeDesc for an instruction */ | |
| 272 public ScopeDesc getScopeDescAt(Address pc) { | |
| 273 PCDesc pd = getPCDescAt(pc); | |
| 274 if (Assert.ASSERTS_ENABLED) { | |
| 275 Assert.that(pd != null, "scope must be present"); | |
| 276 } | |
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277 return new ScopeDesc(this, pd.getScopeDecodeOffset(), pd.getObjDecodeOffset(), pd.getReexecute()); |
| 0 | 278 } |
| 279 | |
| 280 /** This is only for use by the debugging system, and is only | |
| 281 intended for use in the topmost frame, where we are not | |
| 282 guaranteed to be at a PC for which we have a PCDesc. It finds | |
| 283 the PCDesc with realPC closest to the current PC. */ | |
| 284 public PCDesc getPCDescNearDbg(Address pc) { | |
| 285 PCDesc bestGuessPCDesc = null; | |
| 286 long bestDistance = 0; | |
| 287 for (Address p = scopesPCsBegin(); p.lessThan(scopesPCsEnd()); p = p.addOffsetTo(pcDescSize)) { | |
| 288 PCDesc pcDesc = new PCDesc(p); | |
| 289 // In case pc is null | |
| 290 long distance = -pcDesc.getRealPC(this).minus(pc); | |
| 291 if ((bestGuessPCDesc == null) || | |
| 292 ((distance >= 0) && (distance < bestDistance))) { | |
| 293 bestGuessPCDesc = pcDesc; | |
| 294 bestDistance = distance; | |
| 295 } | |
| 296 } | |
| 297 return bestGuessPCDesc; | |
| 298 } | |
| 299 | |
| 300 /** This is only for use by the debugging system, and is only | |
| 301 intended for use in the topmost frame, where we are not | |
| 302 guaranteed to be at a PC for which we have a PCDesc. It finds | |
| 303 the ScopeDesc closest to the current PC. NOTE that this may | |
| 304 return NULL for compiled methods which don't have any | |
| 305 ScopeDescs! */ | |
| 306 public ScopeDesc getScopeDescNearDbg(Address pc) { | |
| 307 PCDesc pd = getPCDescNearDbg(pc); | |
| 308 if (pd == null) return null; | |
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309 return new ScopeDesc(this, pd.getScopeDecodeOffset(), pd.getObjDecodeOffset(), pd.getReexecute()); |
| 0 | 310 } |
| 311 | |
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312 public Map/*<Address, PCDesc>*/ getSafepoints() { |
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313 Map safepoints = new HashMap(); // Map<Address, PCDesc> |
| 0 | 314 sun.jvm.hotspot.debugger.Address p = null; |
| 315 for (p = scopesPCsBegin(); p.lessThan(scopesPCsEnd()); | |
| 316 p = p.addOffsetTo(pcDescSize)) { | |
| 317 PCDesc pcDesc = new PCDesc(p); | |
| 318 sun.jvm.hotspot.debugger.Address pc = pcDesc.getRealPC(this); | |
| 319 safepoints.put(pc, pcDesc); | |
| 320 } | |
| 321 return safepoints; | |
| 322 } | |
| 323 | |
| 324 // FIXME: add getPCOffsetForBCI() | |
| 325 // FIXME: add embeddedOopAt() | |
| 326 // FIXME: add isDependentOn() | |
| 327 // FIXME: add isPatchableAt() | |
| 328 | |
| 329 /** Support for code generation. Only here for proof-of-concept. */ | |
| 330 public static int getEntryPointOffset() { return (int) entryPointField.getOffset(); } | |
| 331 public static int getVerifiedEntryPointOffset() { return (int) verifiedEntryPointField.getOffset(); } | |
| 332 public static int getOSREntryPointOffset() { return (int) osrEntryPointField.getOffset(); } | |
| 333 public static int getEntryBCIOffset() { return (int) entryBCIField.getOffset(); } | |
| 334 /** NOTE: renamed from "method_offset_in_bytes" */ | |
| 335 public static int getMethodOffset() { return (int) methodField.getOffset(); } | |
| 336 | |
| 337 public void print() { | |
| 338 printOn(System.out); | |
| 339 } | |
| 340 | |
| 341 public String toString() { | |
| 342 Method method = getMethod(); | |
| 343 return "NMethod for " + | |
| 344 method.getMethodHolder().getName().asString() + "." + | |
| 345 method.getName().asString() + method.getSignature().asString() + "==>n" + | |
| 346 super.toString(); | |
| 347 } | |
| 348 | |
| 349 public String flagsToString() { | |
| 350 // FIXME need access to flags... | |
| 351 return ""; | |
| 352 } | |
| 353 | |
| 354 public String getName() { | |
| 355 Method method = getMethod(); | |
| 356 return "NMethod for " + | |
| 357 method.getMethodHolder().getName().asString() + "." + | |
| 358 method.getName().asString() + | |
| 359 method.getSignature().asString(); | |
| 360 } | |
| 361 | |
| 362 //-------------------------------------------------------------------------------- | |
| 363 // Internals only below this point | |
| 364 // | |
| 365 | |
| 366 private int getEntryBCI() { return (int) entryBCIField .getValue(addr); } | |
| 367 private int getExceptionOffset() { return (int) exceptionOffsetField .getValue(addr); } | |
| 368 private int getDeoptOffset() { return (int) deoptOffsetField .getValue(addr); } | |
| 369 private int getStubOffset() { return (int) stubOffsetField .getValue(addr); } | |
| 370 private int getScopesDataOffset() { return (int) scopesDataOffsetField .getValue(addr); } | |
| 371 private int getScopesPCsOffset() { return (int) scopesPCsOffsetField .getValue(addr); } | |
| 372 private int getDependenciesOffset() { return (int) dependenciesOffsetField.getValue(addr); } | |
| 373 private int getHandlerTableOffset() { return (int) handlerTableOffsetField.getValue(addr); } | |
| 374 private int getNulChkTableOffset() { return (int) nulChkTableOffsetField .getValue(addr); } | |
| 375 private int getNMethodEndOffset() { return (int) nmethodEndOffsetField .getValue(addr); } | |
| 376 } |