1 /* 2 * Copyright (c) 2011, 2024, Oracle and/or its affiliates. All rights reserved. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 package jdk.vm.ci.hotspot; 25 26 import java.lang.reflect.Executable; 27 import java.lang.reflect.Field; 28 29 import jdk.internal.misc.Unsafe; 30 import jdk.vm.ci.code.BytecodeFrame; 31 import jdk.vm.ci.code.InstalledCode; 32 import jdk.vm.ci.code.InvalidInstalledCodeException; 33 import jdk.vm.ci.code.stack.InspectedFrameVisitor; 34 import jdk.vm.ci.common.InitTimer; 35 import static jdk.vm.ci.common.InitTimer.timer; 36 import jdk.vm.ci.common.JVMCIError; 37 import jdk.vm.ci.hotspot.HotSpotJVMCIRuntime.Option; 38 import static jdk.vm.ci.hotspot.HotSpotJVMCIRuntime.runtime; 39 import jdk.vm.ci.meta.Constant; 40 import jdk.vm.ci.meta.ConstantReflectionProvider; 41 import jdk.vm.ci.meta.JavaConstant; 42 import jdk.vm.ci.meta.JavaKind; 43 import jdk.vm.ci.meta.JavaType; 44 import jdk.vm.ci.meta.ResolvedJavaMethod; 45 import jdk.vm.ci.meta.ResolvedJavaType; 46 47 /** 48 * Calls from Java into HotSpot. The behavior of all the methods in this class that take a native 49 * pointer as an argument (e.g., {@link #getSymbol(long)}) is undefined if the argument does not 50 * denote a valid native object. 51 * 52 * Note also that some calls pass a raw VM value to avoid a JNI upcall. For example, 53 * {@link #getBytecode(HotSpotResolvedJavaMethodImpl, long)} needs the raw {@code Method*} value 54 * (stored in {@link HotSpotResolvedJavaMethodImpl#methodHandle}) in the C++ implementation. The 55 * {@link HotSpotResolvedJavaMethodImpl} wrapper is still passed as well as it may be the last 56 * reference keeping the raw value alive. 57 */ 58 final class CompilerToVM { 59 /** 60 * Initializes the native part of the JVMCI runtime. 61 */ 62 private static native void registerNatives(); 63 64 /** 65 * These values mirror the equivalent values from {@code Unsafe} but are appropriate for the JVM 66 * being compiled against. 67 */ 68 final int ARRAY_BOOLEAN_BASE_OFFSET; 69 final int ARRAY_BYTE_BASE_OFFSET; 70 final int ARRAY_SHORT_BASE_OFFSET; 71 final int ARRAY_CHAR_BASE_OFFSET; 72 final int ARRAY_INT_BASE_OFFSET; 73 final int ARRAY_LONG_BASE_OFFSET; 74 final int ARRAY_FLOAT_BASE_OFFSET; 75 final int ARRAY_DOUBLE_BASE_OFFSET; 76 final int ARRAY_OBJECT_BASE_OFFSET; 77 final int ARRAY_BOOLEAN_INDEX_SCALE; 78 final int ARRAY_BYTE_INDEX_SCALE; 79 final int ARRAY_SHORT_INDEX_SCALE; 80 final int ARRAY_CHAR_INDEX_SCALE; 81 final int ARRAY_INT_INDEX_SCALE; 82 final int ARRAY_LONG_INDEX_SCALE; 83 final int ARRAY_FLOAT_INDEX_SCALE; 84 final int ARRAY_DOUBLE_INDEX_SCALE; 85 final int ARRAY_OBJECT_INDEX_SCALE; 86 87 @SuppressWarnings("try") 88 CompilerToVM() { 89 try (InitTimer t = timer("CompilerToVM.registerNatives")) { 90 registerNatives(); 91 ARRAY_BOOLEAN_BASE_OFFSET = arrayBaseOffset(JavaKind.Boolean.getTypeChar()); 92 ARRAY_BYTE_BASE_OFFSET = arrayBaseOffset(JavaKind.Byte.getTypeChar()); 93 ARRAY_SHORT_BASE_OFFSET = arrayBaseOffset(JavaKind.Short.getTypeChar()); 94 ARRAY_CHAR_BASE_OFFSET = arrayBaseOffset(JavaKind.Char.getTypeChar()); 95 ARRAY_INT_BASE_OFFSET = arrayBaseOffset(JavaKind.Int.getTypeChar()); 96 ARRAY_LONG_BASE_OFFSET = arrayBaseOffset(JavaKind.Long.getTypeChar()); 97 ARRAY_FLOAT_BASE_OFFSET = arrayBaseOffset(JavaKind.Float.getTypeChar()); 98 ARRAY_DOUBLE_BASE_OFFSET = arrayBaseOffset(JavaKind.Double.getTypeChar()); 99 ARRAY_OBJECT_BASE_OFFSET = arrayBaseOffset(JavaKind.Object.getTypeChar()); 100 ARRAY_BOOLEAN_INDEX_SCALE = arrayIndexScale(JavaKind.Boolean.getTypeChar()); 101 ARRAY_BYTE_INDEX_SCALE = arrayIndexScale(JavaKind.Byte.getTypeChar()); 102 ARRAY_SHORT_INDEX_SCALE = arrayIndexScale(JavaKind.Short.getTypeChar()); 103 ARRAY_CHAR_INDEX_SCALE = arrayIndexScale(JavaKind.Char.getTypeChar()); 104 ARRAY_INT_INDEX_SCALE = arrayIndexScale(JavaKind.Int.getTypeChar()); 105 ARRAY_LONG_INDEX_SCALE = arrayIndexScale(JavaKind.Long.getTypeChar()); 106 ARRAY_FLOAT_INDEX_SCALE = arrayIndexScale(JavaKind.Float.getTypeChar()); 107 ARRAY_DOUBLE_INDEX_SCALE = arrayIndexScale(JavaKind.Double.getTypeChar()); 108 ARRAY_OBJECT_INDEX_SCALE = arrayIndexScale(JavaKind.Object.getTypeChar()); 109 } 110 } 111 112 native int arrayBaseOffset(char typeChar); 113 114 native int arrayIndexScale(char typeChar); 115 116 /** 117 * Gets the {@link CompilerToVM} instance associated with the singleton 118 * {@link HotSpotJVMCIRuntime} instance. 119 */ 120 public static CompilerToVM compilerToVM() { 121 return runtime().getCompilerToVM(); 122 } 123 124 /** 125 * Copies the original bytecode of {@code method} into a new byte array and returns it. 126 * 127 * @return a new byte array containing the original bytecode of {@code method} 128 */ 129 byte[] getBytecode(HotSpotResolvedJavaMethodImpl method) { 130 return getBytecode(method, method.getMethodPointer()); 131 } 132 133 private native byte[] getBytecode(HotSpotResolvedJavaMethodImpl method, long methodPointer); 134 135 /** 136 * Gets the number of entries in {@code method}'s exception handler table or 0 if it has no 137 * exception handler table. 138 */ 139 int getExceptionTableLength(HotSpotResolvedJavaMethodImpl method) { 140 return getExceptionTableLength(method, method.getMethodPointer()); 141 } 142 143 private native int getExceptionTableLength(HotSpotResolvedJavaMethodImpl method, long methodPointer); 144 145 /** 146 * Gets the address of the first entry in {@code method}'s exception handler table. 147 * 148 * Each entry is a native object described by these fields: 149 * 150 * <ul> 151 * <li>{@link HotSpotVMConfig#exceptionTableElementSize}</li> 152 * <li>{@link HotSpotVMConfig#exceptionTableElementStartPcOffset}</li> 153 * <li>{@link HotSpotVMConfig#exceptionTableElementEndPcOffset}</li> 154 * <li>{@link HotSpotVMConfig#exceptionTableElementHandlerPcOffset}</li> 155 * <li>{@link HotSpotVMConfig#exceptionTableElementCatchTypeIndexOffset} 156 * </ul> 157 * 158 * @return 0 if {@code method} has no exception handlers (i.e. 159 * {@code getExceptionTableLength(method) == 0}) 160 */ 161 long getExceptionTableStart(HotSpotResolvedJavaMethodImpl method) { 162 return getExceptionTableStart(method, method.getMethodPointer()); 163 } 164 165 private native long getExceptionTableStart(HotSpotResolvedJavaMethodImpl method, long methodPointer); 166 167 /** 168 * Determines whether {@code method} is currently compilable by the JVMCI compiler being used by 169 * the VM. This can return false if JVMCI compilation failed earlier for {@code method}, a 170 * breakpoint is currently set in {@code method} or {@code method} contains other bytecode 171 * features that require special handling by the VM. 172 */ 173 boolean isCompilable(HotSpotResolvedJavaMethodImpl method) { 174 return isCompilable(method, method.getMethodPointer()); 175 } 176 177 private native boolean isCompilable(HotSpotResolvedJavaMethodImpl method, long methodPointer); 178 179 /** 180 * Determines if {@code method} is targeted by a VM directive (e.g., 181 * {@code -XX:CompileCommand=dontinline,<pattern>}) or annotation (e.g., 182 * {@code jdk.internal.vm.annotation.DontInline}) that specifies it should not be inlined. 183 */ 184 boolean hasNeverInlineDirective(HotSpotResolvedJavaMethodImpl method) { 185 return hasNeverInlineDirective(method, method.getMethodPointer()); 186 } 187 188 private native boolean hasNeverInlineDirective(HotSpotResolvedJavaMethodImpl method, long methodPointer); 189 190 /** 191 * Determines if {@code method} should be inlined at any cost. This could be because: 192 * <ul> 193 * <li>a CompileOracle directive may forces inlining of this methods</li> 194 * <li>an annotation forces inlining of this method</li> 195 * </ul> 196 */ 197 boolean shouldInlineMethod(HotSpotResolvedJavaMethodImpl method) { 198 return shouldInlineMethod(method, method.getMethodPointer()); 199 } 200 201 private native boolean shouldInlineMethod(HotSpotResolvedJavaMethodImpl method, long methodPointer); 202 203 /** 204 * Used to implement {@link ResolvedJavaType#findUniqueConcreteMethod(ResolvedJavaMethod)}. 205 * 206 * @param actualHolderType the best known type of receiver 207 * @param method the method on which to base the search 208 * @return the method result or 0 is there is no unique concrete method for {@code method} 209 */ 210 HotSpotResolvedJavaMethodImpl findUniqueConcreteMethod(HotSpotResolvedObjectTypeImpl actualHolderType, HotSpotResolvedJavaMethodImpl method) { 211 return findUniqueConcreteMethod(actualHolderType, actualHolderType.getKlassPointer(), method, method.getMetaspacePointer()); 212 } 213 214 private native HotSpotResolvedJavaMethodImpl findUniqueConcreteMethod(HotSpotResolvedObjectTypeImpl klass, long klassPointer, HotSpotResolvedJavaMethodImpl method, long methodPointer); 215 216 /** 217 * Gets the implementor for the interface class {@code type}. 218 * 219 * @return the implementor if there is a single implementor, {@code null} if there is no 220 * implementor, or {@code type} itself if there is more than one implementor 221 * @throws IllegalArgumentException if type is not an interface type 222 */ 223 HotSpotResolvedObjectTypeImpl getImplementor(HotSpotResolvedObjectTypeImpl type) { 224 return getImplementor(type, type.getKlassPointer()); 225 } 226 227 private native HotSpotResolvedObjectTypeImpl getImplementor(HotSpotResolvedObjectTypeImpl type, long klassPointer); 228 229 /** 230 * Determines if {@code method} is ignored by security stack walks. 231 */ 232 boolean methodIsIgnoredBySecurityStackWalk(HotSpotResolvedJavaMethodImpl method) { 233 return methodIsIgnoredBySecurityStackWalk(method, method.getMetaspacePointer()); 234 } 235 236 private native boolean methodIsIgnoredBySecurityStackWalk(HotSpotResolvedJavaMethodImpl method, long methodPointer); 237 238 /** 239 * Converts a name to a type. 240 * 241 * @param name a well formed Java type in {@linkplain JavaType#getName() internal} format 242 * @param accessingClass the class loader of this class is used for resolution. Must not be null. 243 * @param resolve force resolution to a {@link ResolvedJavaType}. If true, this method will 244 * either return a {@link ResolvedJavaType} or throw an exception 245 * @return the type for {@code name} or {@code null} if resolution failed and {@code resolve == false} 246 * @throws NoClassDefFoundError if {@code resolve == true} and the resolution failed 247 */ 248 HotSpotResolvedJavaType lookupType(String name, HotSpotResolvedObjectTypeImpl accessingClass, boolean resolve) throws NoClassDefFoundError { 249 return lookupType(name, accessingClass, accessingClass.getKlassPointer(), -1, resolve); 250 } 251 252 /** 253 * Converts a name to a type. 254 * 255 * @param classLoader the class loader to use for resolution. Must not be {@code null}, 256 * {@link ClassLoader#getPlatformClassLoader} or {@link ClassLoader#getSystemClassLoader} 257 * @param name a well formed Java type in {@linkplain JavaType#getName() internal} format 258 * @return the type for {@code name} 259 * @throws NoClassDefFoundError if resolution failed 260 */ 261 HotSpotResolvedJavaType lookupType(ClassLoader classLoader, String name) throws NoClassDefFoundError { 262 int accessingClassLoader; 263 if (classLoader == null) { 264 accessingClassLoader = 0; 265 } else if (classLoader == ClassLoader.getPlatformClassLoader()) { 266 accessingClassLoader = 1; 267 } else if (classLoader == ClassLoader.getSystemClassLoader()) { 268 accessingClassLoader = 2; 269 } else { 270 throw new IllegalArgumentException("Unsupported class loader for lookup: " + classLoader); 271 } 272 return lookupType(name, null, 0L, accessingClassLoader, true); 273 } 274 275 /** 276 * @param accessingClassLoader ignored if {@code accessingKlassPointer != 0L}. Otherwise, the supported values are: 277 * 0 - boot class loader 278 * 1 - {@linkplain ClassLoader#getPlatformClassLoader() platform class loader} 279 * 2 - {@linkplain ClassLoader#getSystemClassLoader() system class loader} 280 */ 281 private native HotSpotResolvedJavaType lookupType(String name, HotSpotResolvedObjectTypeImpl accessingClass, long accessingKlassPointer, int accessingClassLoader, boolean resolve) throws NoClassDefFoundError; 282 283 /** 284 * Converts {@code javaClass} to a HotSpotResolvedJavaType. 285 * 286 * Must not be called if {@link Services#IS_IN_NATIVE_IMAGE} is {@code true}. 287 */ 288 native HotSpotResolvedJavaType lookupClass(Class<?> javaClass); 289 290 native HotSpotResolvedJavaType lookupJClass(long jclass); 291 292 /** 293 * Gets the {@code jobject} value wrapped by {@code peerObject}. 294 * Must not be called if {@link Services#IS_IN_NATIVE_IMAGE} is {@code false}. 295 */ 296 native long getJObjectValue(HotSpotObjectConstantImpl peerObject); 297 298 /** 299 * Resolves the entry at index {@code cpi} in {@code constantPool} to an interned String object. 300 * 301 * The behavior of this method is undefined if {@code cpi} does not denote an 302 * {@code JVM_CONSTANT_String}. 303 */ 304 JavaConstant getUncachedStringInPool(HotSpotConstantPool constantPool, int cpi) { 305 return getUncachedStringInPool(constantPool, constantPool.getConstantPoolPointer(), cpi); 306 } 307 308 private native JavaConstant getUncachedStringInPool(HotSpotConstantPool constantPool, long constantPoolPointer, int cpi); 309 310 /** 311 * Gets the entry at index {@code cpi} in {@code constantPool}, looking in the 312 * constant pool cache first. 313 * 314 * The behavior of this method is undefined if {@code cpi} does not denote one of the following 315 * entry types: {@code JVM_CONSTANT_Dynamic}, {@code JVM_CONSTANT_String}, 316 * {@code JVM_CONSTANT_MethodHandle}, {@code JVM_CONSTANT_MethodHandleInError}, 317 * {@code JVM_CONSTANT_MethodType} and {@code JVM_CONSTANT_MethodTypeInError}. 318 * 319 * @param resolve specifies if a resolved entry is expected. If {@code false}, 320 * {@code null} is returned for an unresolved entry. 321 */ 322 JavaConstant lookupConstantInPool(HotSpotConstantPool constantPool, int cpi, boolean resolve) { 323 return lookupConstantInPool(constantPool, constantPool.getConstantPoolPointer(), cpi, resolve); 324 } 325 326 private native JavaConstant lookupConstantInPool(HotSpotConstantPool constantPool, long constantPoolPointer, int cpi, boolean resolve); 327 328 /** 329 * Gets the {@code JVM_CONSTANT_NameAndType} index referenced by the {@code rawIndex}. 330 * The meaning of {@code rawIndex} is dependent on the given {@opcode}. 331 * 332 * The behavior of this method is undefined if the class holding the {@code constantPool} 333 * has not yet been rewritten, or {@code rawIndex} is not a valid index for 334 * this class for the given {@code opcode} 335 */ 336 int lookupNameAndTypeRefIndexInPool(HotSpotConstantPool constantPool, int rawIndex, int opcode) { 337 return lookupNameAndTypeRefIndexInPool(constantPool, constantPool.getConstantPoolPointer(), rawIndex, opcode); 338 } 339 340 private native int lookupNameAndTypeRefIndexInPool(HotSpotConstantPool constantPool, long constantPoolPointer, int rawIndex, int opcode); 341 342 /** 343 * Gets the name of the {@code JVM_CONSTANT_NameAndType} entry in {@code constantPool} 344 * referenced by the {@code which}. 345 * 346 * The behavior of this method is undefined if the class holding the {@code constantPool} 347 * has not yet been rewritten, or {@code which} is not a valid index for 348 * this class for the given {@code opcode} 349 * 350 * @param which for INVOKE{VIRTUAL,SPECIAL,STATIC,INTERFACE}, must be {@code cpci}. For all other bytecodes, 351 * must be {@code rawIndex} 352 */ 353 String lookupNameInPool(HotSpotConstantPool constantPool, int which, int opcode) { 354 return lookupNameInPool(constantPool, constantPool.getConstantPoolPointer(), which, opcode); 355 } 356 357 private native String lookupNameInPool(HotSpotConstantPool constantPool, long constantPoolPointer, int which, int opcode); 358 359 /** 360 * Gets the signature of the {@code JVM_CONSTANT_NameAndType} entry in {@code constantPool} 361 * referenced by the {@code which}. 362 * 363 * The behavior of this method is undefined if the class holding the {@code constantPool} 364 * has not yet been rewritten, or {@code which} is not a valid index for 365 * this class for the given {@code opcode} 366 * 367 * @param which for INVOKE{VIRTUAL,SPECIAL,STATIC,INTERFACE}, must be {@code cpci}. For all other bytecodes, 368 * must be {@code rawIndex} 369 */ 370 String lookupSignatureInPool(HotSpotConstantPool constantPool, int which, int opcode) { 371 return lookupSignatureInPool(constantPool, constantPool.getConstantPoolPointer(), which, opcode); 372 } 373 374 private native String lookupSignatureInPool(HotSpotConstantPool constantPool, long constantPoolPointer, int which, int opcode); 375 376 /** 377 * Gets the {@code JVM_CONSTANT_Class} index from the entry in {@code constantPool} 378 * referenced by the {@code which}. The meaning of {@code which} is dependent 379 * on the given {@opcode}. 380 * 381 * The behavior of this method is undefined if the class holding the {@code constantPool} 382 * has not yet been rewritten, or {@code which} is not a valid index for 383 * this class for the given {@code opcode} 384 * 385 * @param which for INVOKE{VIRTUAL,SPECIAL,STATIC,INTERFACE}, must be {@code cpci}. For all other bytecodes, 386 * must be {@code rawIndex} 387 */ 388 int lookupKlassRefIndexInPool(HotSpotConstantPool constantPool, int which, int opcode) { 389 return lookupKlassRefIndexInPool(constantPool, constantPool.getConstantPoolPointer(), which, opcode); 390 } 391 392 private native int lookupKlassRefIndexInPool(HotSpotConstantPool constantPool, long constantPoolPointer, int which, int opcode); 393 394 /** 395 * Looks up a class denoted by the {@code JVM_CONSTANT_Class} entry at index {@code cpi} in 396 * {@code constantPool}. This method does not perform any resolution. 397 * 398 * The behavior of this method is undefined if {@code cpi} does not denote a 399 * {@code JVM_CONSTANT_Class} entry. 400 * 401 * @return the resolved class entry or a String otherwise 402 */ 403 Object lookupKlassInPool(HotSpotConstantPool constantPool, int cpi) { 404 return lookupKlassInPool(constantPool, constantPool.getConstantPoolPointer(), cpi); 405 } 406 407 private native Object lookupKlassInPool(HotSpotConstantPool constantPool, long constantPoolPointer, int cpi); 408 409 /** 410 * Looks up a method denoted by the entry at index {@code cpi} in {@code constantPool}. This 411 * method does not perform any resolution. 412 * 413 * The behavior of this method is undefined if {@code cpi} does not denote an entry representing 414 * a method. 415 * 416 * @param opcode the opcode of the instruction for which the lookup is being performed or 417 * {@code -1}. If non-negative, then resolution checks specific to the bytecode it 418 * denotes are performed if the method is already resolved. Should any of these 419 * checks fail, 0 is returned. 420 * @param caller if non-null, do access checks in the context of {@code caller} calling the 421 * looked up method 422 * @return the resolved method entry, 0 otherwise 423 */ 424 HotSpotResolvedJavaMethodImpl lookupMethodInPool(HotSpotConstantPool constantPool, int cpi, byte opcode, HotSpotResolvedJavaMethodImpl caller) { 425 long callerMethodPointer = caller == null ? 0L : caller.getMethodPointer(); 426 return lookupMethodInPool(constantPool, constantPool.getConstantPoolPointer(), cpi, opcode, caller, callerMethodPointer); 427 } 428 429 private native HotSpotResolvedJavaMethodImpl lookupMethodInPool(HotSpotConstantPool constantPool, 430 long constantPoolPointer, 431 int cpi, 432 byte opcode, 433 HotSpotResolvedJavaMethodImpl caller, 434 long callerMethodPointer); 435 436 /** 437 * Converts the indy index operand of an invokedynamic instruction 438 * to an index directly into {@code constantPool}. 439 * 440 * @param resolve if {@true}, then resolve the entry (which may call a bootstrap method) 441 * @return {@code JVM_CONSTANT_InvokeDynamic} constant pool entry index for the invokedynamic 442 */ 443 int decodeIndyIndexToCPIndex(HotSpotConstantPool constantPool, int encoded_indy_index, boolean resolve) { 444 return decodeIndyIndexToCPIndex(constantPool, constantPool.getConstantPoolPointer(), encoded_indy_index, resolve); 445 } 446 447 private native int decodeIndyIndexToCPIndex(HotSpotConstantPool constantPool, long constantPoolPointer, int encoded_indy_index, boolean resolve); 448 449 /** 450 * Converts the {@code rawIndex} operand of a rewritten getfield/putfield/getstatic/putstatic instruction 451 * to an index directly into {@code constantPool}. 452 * 453 * @throws IllegalArgumentException if {@code rawIndex} is out of range. 454 * @return {@code JVM_CONSTANT_FieldRef} constant pool entry index for the instruction 455 */ 456 int decodeFieldIndexToCPIndex(HotSpotConstantPool constantPool, int rawIndex) { 457 return decodeFieldIndexToCPIndex(constantPool, constantPool.getConstantPoolPointer(), rawIndex); 458 } 459 460 private native int decodeFieldIndexToCPIndex(HotSpotConstantPool constantPool, long constantPoolPointer, int rawIndex); 461 462 /** 463 * Converts the {@code rawIndex} operand of a rewritten invokestatic/invokespecial/invokeinterface/invokevirtual instruction 464 * to an index directly into {@code constantPool}. 465 * 466 * @throws IllegalArgumentException if {@code rawIndex} is out of range. 467 * @return {@code JVM_CONSTANT_MethodRef} or {@code JVM_CONSTANT_InterfaceMethodRef} constant pool entry index for the instruction 468 */ 469 int decodeMethodIndexToCPIndex(HotSpotConstantPool constantPool, int rawIndex) { 470 return decodeMethodIndexToCPIndex(constantPool, constantPool.getConstantPoolPointer(), rawIndex); 471 } 472 473 private native int decodeMethodIndexToCPIndex(HotSpotConstantPool constantPool, long constantPoolPointer, int rawIndex); 474 475 /** 476 * Returns the number of {@code ResolvedIndyEntry}s present within this constant 477 * pool. 478 */ 479 int getNumIndyEntries(HotSpotConstantPool constantPool) { 480 return getNumIndyEntries(constantPool, constantPool.getConstantPoolPointer()); 481 } 482 483 private native int getNumIndyEntries(HotSpotConstantPool constantPool, long constantPoolPointer); 484 485 /** 486 * Resolves the details for invoking the bootstrap method associated with the 487 * {@code CONSTANT_Dynamic_info} or @{code CONSTANT_InvokeDynamic_info} entry at {@code cpi} in 488 * {@code constant pool}. 489 * 490 * The return value encodes the details in an object array that is described by the pseudo Java 491 * object {@code info} below: 492 * 493 * <pre> 494 * bsm_invocation = [ 495 * ResolvedJavaMethod[] method, 496 * String name, 497 * Object type, // JavaConstant: reference to Class (condy) or MethodType (indy) 498 * Object staticArguments, // null: no static arguments 499 * // JavaConstant: single static argument 500 * // JavaConstant[]: multiple static arguments 501 * // int[]: static arguments to be resolved via BootstrapCallInfo 502 * ] 503 * </pre> 504 * 505 * @return bootstrap method invocation details as encoded above 506 */ 507 Object[] resolveBootstrapMethod(HotSpotConstantPool constantPool, int cpi) { 508 return resolveBootstrapMethod(constantPool, constantPool.getConstantPoolPointer(), cpi); 509 } 510 511 private native Object[] resolveBootstrapMethod(HotSpotConstantPool constantPool, long constantPoolPointer, int cpi); 512 513 /** 514 * Gets the constant pool index of a static argument of a {@code CONSTANT_Dynamic_info} or 515 * @{code CONSTANT_InvokeDynamic_info} entry. Used when the list of static arguments in the 516 * {@link BootstrapMethodInvocation} is a {@code List<PrimitiveConstant>} of the form 517 * {{@code arg_count}, {@code pool_index}}, meaning the arguments are not already resolved and that 518 * the JDK has to lookup the arguments when they are needed. The {@code cpi} corresponds to 519 * {@code pool_index} and the {@code index} has to be smaller than {@code arg_count}. 520 * 521 * The behavior of this method is undefined if {@code cpi} does not denote an entry representing 522 * a {@code CONSTANT_Dynamic_info} or a @{code CONSTANT_InvokeDynamic_info}, or if the index 523 * is out of bounds. 524 * 525 * @param cpi the index of a {@code CONSTANT_Dynamic_info} or @{code CONSTANT_InvokeDynamic_info} entry 526 * @param index the index of the static argument in the list of static arguments 527 * @return the constant pool index associated with the static argument 528 */ 529 int bootstrapArgumentIndexAt(HotSpotConstantPool constantPool, int cpi, int index) { 530 return bootstrapArgumentIndexAt(constantPool, constantPool.getConstantPoolPointer(), cpi, index); 531 } 532 533 private native int bootstrapArgumentIndexAt(HotSpotConstantPool constantPool, long constantPoolPointer, int cpi, int index); 534 535 /** 536 * If {@code cpi} denotes an entry representing a signature polymorphic method ({@jvms 2.9}), 537 * this method ensures that the type referenced by the entry is loaded and initialized. It 538 * {@code cpi} does not denote a signature polymorphic method, this method does nothing. 539 */ 540 void resolveInvokeHandleInPool(HotSpotConstantPool constantPool, int cpi) { 541 resolveInvokeHandleInPool(constantPool, constantPool.getConstantPoolPointer(), cpi); 542 } 543 544 private native void resolveInvokeHandleInPool(HotSpotConstantPool constantPool, long constantPoolPointer, int cpi); 545 546 /** 547 * If {@code cpi} denotes an entry representing a resolved dynamic adapter (see 548 * {@link #decodeIndyIndexToCPIndex} and {@link #resolveInvokeHandleInPool}), return the 549 * opcode of the instruction for which the resolution was performed ({@code invokedynamic} or 550 * {@code invokevirtual}), or {@code -1} otherwise. 551 */ 552 int isResolvedInvokeHandleInPool(HotSpotConstantPool constantPool, int cpi, int opcode) { 553 return isResolvedInvokeHandleInPool(constantPool, constantPool.getConstantPoolPointer(), cpi, opcode); 554 } 555 556 private native int isResolvedInvokeHandleInPool(HotSpotConstantPool constantPool, long constantPoolPointer, int cpi, int opcode); 557 558 /** 559 * Gets the list of type names (in the format of {@link JavaType#getName()}) denoting the 560 * classes that define signature polymorphic methods. 561 */ 562 native String[] getSignaturePolymorphicHolders(); 563 564 /** 565 * Gets the resolved type denoted by the entry at index {@code cpi} in {@code constantPool}. 566 * 567 * The behavior of this method is undefined if {@code cpi} does not denote an entry representing 568 * a class. 569 * 570 * @throws LinkageError if resolution failed 571 */ 572 HotSpotResolvedObjectTypeImpl resolveTypeInPool(HotSpotConstantPool constantPool, int cpi) throws LinkageError { 573 return resolveTypeInPool(constantPool, constantPool.getConstantPoolPointer(), cpi); 574 } 575 576 private native HotSpotResolvedObjectTypeImpl resolveTypeInPool(HotSpotConstantPool constantPool, long constantPoolPointer, int cpi) throws LinkageError; 577 578 /** 579 * Looks up and attempts to resolve the {@code JVM_CONSTANT_Field} entry denoted by 580 * {@code rawIndex}. For some opcodes, checks are performed that require the 581 * {@code method} that contains {@code opcode} to be specified. The values returned in 582 * {@code info} are: 583 * 584 * <pre> 585 * [ aflags, // fieldDescriptor::access_flags() 586 * offset, // fieldDescriptor::offset() 587 * index, // fieldDescriptor::index() 588 * fflags // fieldDescriptor::field_flags() 589 * ] 590 * </pre> 591 * 592 * The behavior of this method is undefined if {@code rawIndex} is invalid. 593 * 594 * @param info an array in which the details of the field are returned 595 * @return the type defining the field if resolution is successful, null if the type cannot be resolved 596 * @throws LinkageError if there were other problems resolving the field 597 */ 598 HotSpotResolvedObjectTypeImpl resolveFieldInPool(HotSpotConstantPool constantPool, int rawIndex, HotSpotResolvedJavaMethodImpl method, byte opcode, int[] info) { 599 long methodPointer = method != null ? method.getMethodPointer() : 0L; 600 return resolveFieldInPool(constantPool, constantPool.getConstantPoolPointer(), rawIndex, method, methodPointer, opcode, info); 601 } 602 603 private native HotSpotResolvedObjectTypeImpl resolveFieldInPool(HotSpotConstantPool constantPool, long constantPoolPointer, 604 int rawIndex, HotSpotResolvedJavaMethodImpl method, long methodPointer, byte opcode, int[] info); 605 606 /** 607 * Gets the appendix object (if any) associated with the entry identified by {@code which}. 608 * 609 * @param which if negative, is treated as an encoded indy index for INVOKEDYNAMIC; 610 * Otherwise, it's treated as a constant pool cache index 611 * for INVOKE{VIRTUAL,SPECIAL,STATIC,INTERFACE}. 612 */ 613 HotSpotObjectConstantImpl lookupAppendixInPool(HotSpotConstantPool constantPool, int which, int opcode) { 614 return lookupAppendixInPool(constantPool, constantPool.getConstantPoolPointer(), which, opcode); 615 } 616 617 private native HotSpotObjectConstantImpl lookupAppendixInPool(HotSpotConstantPool constantPool, long constantPoolPointer, int which, int opcode); 618 619 /** 620 * Installs the result of a compilation into the code cache. 621 * 622 * @param compiledCode the result of a compilation 623 * @param code the details of the installed CodeBlob are written to this object 624 * 625 * @return the outcome of the installation which will be one of 626 * {@link HotSpotVMConfig#codeInstallResultOk}, 627 * {@link HotSpotVMConfig#codeInstallResultCacheFull}, 628 * {@link HotSpotVMConfig#codeInstallResultCodeTooLarge} or 629 * {@link HotSpotVMConfig#codeInstallResultDependenciesFailed}. 630 * @throws JVMCIError if there is something wrong with the compiled code or the associated 631 * metadata. 632 */ 633 int installCode(HotSpotCompiledCode compiledCode, InstalledCode code, long failedSpeculationsAddress, byte[] speculations) { 634 int codeInstallFlags = getInstallCodeFlags(); 635 boolean withComments = (codeInstallFlags & 0x0001) != 0; 636 boolean withMethods = (codeInstallFlags & 0x0002) != 0; 637 boolean withTypeInfo; 638 if ((codeInstallFlags & 0x0004) != 0 && HotSpotJVMCIRuntime.Option.CodeSerializationTypeInfo.isDefault) { 639 withTypeInfo = true; 640 } else { 641 withTypeInfo = HotSpotJVMCIRuntime.Option.CodeSerializationTypeInfo.getBoolean(); 642 } 643 try (HotSpotCompiledCodeStream stream = new HotSpotCompiledCodeStream(compiledCode, withTypeInfo, withComments, withMethods)) { 644 return installCode0(stream.headChunk, stream.timeNS, withTypeInfo, compiledCode, stream.objectPool, code, failedSpeculationsAddress, speculations); 645 } 646 } 647 648 native int installCode0(long compiledCodeBuffer, 649 long serializationNS, 650 boolean withTypeInfo, 651 HotSpotCompiledCode compiledCode, 652 Object[] objectPool, 653 InstalledCode code, 654 long failedSpeculationsAddress, 655 byte[] speculations); 656 657 /** 658 * Gets flags specifying optional parts of code info. Only if a flag is set, will the 659 * corresponding code info being included in the {@linkplain HotSpotCompiledCodeStream 660 * serialized code stream}. 661 * 662 * <ul> 663 * <li>0x0001: code comments ({@link HotSpotCompiledCode#comments})</li> 664 * <li>0x0002: methods ({@link HotSpotCompiledCode#methods})</li> 665 * <li>0x0004: enable {@link Option#CodeSerializationTypeInfo} if it not explicitly specified 666 * (i.e., {@link Option#isDefault} is {@code true})</li> 667 * </ul> 668 */ 669 private native int getInstallCodeFlags(); 670 671 /** 672 * Resets all compilation statistics. 673 */ 674 native void resetCompilationStatistics(); 675 676 /** 677 * Reads the database of VM info. The return value encodes the info in a nested object array 678 * that is described by the pseudo Java object {@code info} below: 679 * 680 * <pre> 681 * info = [ 682 * VMField[] vmFields, 683 * [String name, Long size, ...] vmTypeSizes, 684 * [String name, Long value, ...] vmConstants, 685 * [String name, Long value, ...] vmAddresses, 686 * VMFlag[] vmFlags 687 * VMIntrinsicMethod[] vmIntrinsics 688 * ] 689 * </pre> 690 * 691 * @return VM info as encoded above 692 */ 693 native Object[] readConfiguration(); 694 695 /** 696 * Resolves the implementation of {@code method} for virtual dispatches on objects of dynamic 697 * type {@code exactReceiver}. This resolution process only searches "up" the class hierarchy of 698 * {@code exactReceiver}. 699 * 700 * @param exactReceiver the exact receiver type 701 * @param caller the caller or context type used to perform access checks 702 * @return the link-time resolved method (might be abstract) or {@code null} if it is either a 703 * signature polymorphic method or can not be linked. 704 */ 705 HotSpotResolvedJavaMethodImpl resolveMethod(HotSpotResolvedObjectTypeImpl exactReceiver, HotSpotResolvedJavaMethodImpl method, HotSpotResolvedObjectTypeImpl caller) { 706 return resolveMethod(exactReceiver, exactReceiver.getKlassPointer(), method, method.getMethodPointer(), caller, caller.getKlassPointer()); 707 } 708 709 private native HotSpotResolvedJavaMethodImpl resolveMethod(HotSpotResolvedObjectTypeImpl exactReceiver, long exactReceiverKlass, 710 HotSpotResolvedJavaMethodImpl method, long methodPointer, 711 HotSpotResolvedObjectTypeImpl caller, long callerKlass); 712 713 /** 714 * Gets the static initializer of {@code type}. 715 * 716 * @return {@code null} if {@code type} has no static initializer 717 */ 718 HotSpotResolvedJavaMethodImpl getClassInitializer(HotSpotResolvedObjectTypeImpl type) { 719 return getClassInitializer(type, type.getKlassPointer()); 720 } 721 722 private native HotSpotResolvedJavaMethodImpl getClassInitializer(HotSpotResolvedObjectTypeImpl type, long klassPointer); 723 724 /** 725 * Determines if {@code type} or any of its currently loaded subclasses overrides 726 * {@code Object.finalize()}. 727 */ 728 boolean hasFinalizableSubclass(HotSpotResolvedObjectTypeImpl type) { 729 return hasFinalizableSubclass(type, type.getKlassPointer()); 730 } 731 732 private native boolean hasFinalizableSubclass(HotSpotResolvedObjectTypeImpl type, long klassPointer); 733 734 /** 735 * Gets the method corresponding to {@code executable}. 736 */ 737 native HotSpotResolvedJavaMethodImpl asResolvedJavaMethod(Executable executable); 738 739 /** 740 * Gets the maximum absolute offset of a PC relative call to {@code address} from any position 741 * in the code cache. 742 * 743 * @param address an address that may be called from any code in the code cache 744 * @return -1 if {@code address == 0} 745 */ 746 native long getMaxCallTargetOffset(long address); 747 748 /** 749 * Gets a textual disassembly of {@code codeBlob}. 750 * 751 * @return a non-zero length string containing a disassembly of {@code codeBlob} or null if 752 * {@code codeBlob} could not be disassembled for some reason 753 */ 754 // The HotSpot disassembler seems not to be thread safe so it's better to synchronize its usage 755 synchronized native String disassembleCodeBlob(InstalledCode installedCode); 756 757 /** 758 * Gets a stack trace element for {@code method} at bytecode index {@code bci}. 759 */ 760 StackTraceElement getStackTraceElement(HotSpotResolvedJavaMethodImpl method, int bci) { 761 return getStackTraceElement(method, method.getMethodPointer(), bci); 762 } 763 764 private native StackTraceElement getStackTraceElement(HotSpotResolvedJavaMethodImpl method, long methodPointer, int bci); 765 766 /** 767 * Executes some {@code installedCode} with arguments {@code args}. 768 * 769 * @return the result of executing {@code nmethodMirror} 770 * @throws InvalidInstalledCodeException if {@code nmethodMirror} has been invalidated 771 */ 772 native Object executeHotSpotNmethod(Object[] args, HotSpotNmethod nmethodMirror) throws InvalidInstalledCodeException; 773 774 /** 775 * Gets the line number table for {@code method}. The line number table is encoded as (bci, 776 * source line number) pairs. 777 * 778 * @return the line number table for {@code method} or null if it doesn't have one 779 */ 780 long[] getLineNumberTable(HotSpotResolvedJavaMethodImpl method) { 781 return getLineNumberTable(method, method.getMethodPointer()); 782 } 783 784 private native long[] getLineNumberTable(HotSpotResolvedJavaMethodImpl method, long methodPointer); 785 786 /** 787 * Gets the number of entries in the local variable table for {@code method}. 788 * 789 * @return the number of entries in the local variable table for {@code method} 790 */ 791 int getLocalVariableTableLength(HotSpotResolvedJavaMethodImpl method) { 792 return getLocalVariableTableLength(method, method.getMethodPointer()); 793 } 794 795 private native int getLocalVariableTableLength(HotSpotResolvedJavaMethodImpl method, long methodPointer); 796 797 /** 798 * Gets the address of the first entry in the local variable table for {@code method}. 799 * 800 * Each entry is a native object described by these fields: 801 * 802 * <ul> 803 * <li>{@link HotSpotVMConfig#localVariableTableElementSize}</li> 804 * <li>{@link HotSpotVMConfig#localVariableTableElementLengthOffset}</li> 805 * <li>{@link HotSpotVMConfig#localVariableTableElementNameCpIndexOffset}</li> 806 * <li>{@link HotSpotVMConfig#localVariableTableElementDescriptorCpIndexOffset}</li> 807 * <li>{@link HotSpotVMConfig#localVariableTableElementSlotOffset} 808 * <li>{@link HotSpotVMConfig#localVariableTableElementStartBciOffset} 809 * </ul> 810 * 811 * @return 0 if {@code method} does not have a local variable table 812 */ 813 long getLocalVariableTableStart(HotSpotResolvedJavaMethodImpl method) { 814 return getLocalVariableTableStart(method, method.getMetaspacePointer()); 815 } 816 817 private native long getLocalVariableTableStart(HotSpotResolvedJavaMethodImpl method, long methodPointer); 818 819 /** 820 * Sets flags on {@code method} indicating that it should never be inlined or compiled by the 821 * VM. 822 */ 823 void setNotInlinableOrCompilable(HotSpotResolvedJavaMethodImpl method) { 824 setNotInlinableOrCompilable(method, method.getMethodPointer()); 825 } 826 827 private native void setNotInlinableOrCompilable(HotSpotResolvedJavaMethodImpl method, long methodPointer); 828 829 /** 830 * Invalidates the profiling information for {@code method} and (re)initializes it such that 831 * profiling restarts upon its next invocation. 832 */ 833 void reprofile(HotSpotResolvedJavaMethodImpl method) { 834 reprofile(method, method.getMethodPointer()); 835 } 836 837 private native void reprofile(HotSpotResolvedJavaMethodImpl method, long methodPointer); 838 839 /** 840 * Updates {@code nmethodMirror} such that {@link InvalidInstalledCodeException} will be raised 841 * the next time {@code nmethodMirror} is {@linkplain #executeHotSpotNmethod executed}. The 842 * {@code nmethod} associated with {@code nmethodMirror} is also made non-entrant and if 843 * {@code deoptimize == true} any current activations of the {@code nmethod} are deoptimized. 844 */ 845 native void invalidateHotSpotNmethod(HotSpotNmethod nmethodMirror, boolean deoptimize); 846 847 /** 848 * Collects the current values of all JVMCI benchmark counters, summed up over all threads. 849 */ 850 native long[] collectCounters(); 851 852 /** 853 * Get the current number of counters allocated for use by JVMCI. Should be the same value as 854 * the flag {@code JVMCICounterSize}. 855 */ 856 native int getCountersSize(); 857 858 /** 859 * Attempt to change the size of the counters allocated for JVMCI. This requires a safepoint to 860 * safely reallocate the storage but it's advisable to increase the size in reasonable chunks. 861 */ 862 native boolean setCountersSize(int newSize); 863 864 /** 865 * Determines if {@code methodData} is mature. 866 * 867 * @param methodData a {@code MethodData*} value 868 */ 869 native boolean isMature(long methodData); 870 871 /** 872 * Generate a unique id to identify the result of the compile. 873 */ 874 int allocateCompileId(HotSpotResolvedJavaMethodImpl method, int entryBCI) { 875 return allocateCompileId(method, method.getMethodPointer(), entryBCI); 876 } 877 878 private native int allocateCompileId(HotSpotResolvedJavaMethodImpl method, long methodPointer, int entryBCI); 879 880 /** 881 * Determines if {@code method} has OSR compiled code identified by {@code entryBCI} for 882 * compilation level {@code level}. 883 */ 884 boolean hasCompiledCodeForOSR(HotSpotResolvedJavaMethodImpl method, int entryBCI, int level) { 885 return hasCompiledCodeForOSR(method, method.getMethodPointer(), entryBCI, level); 886 } 887 888 private native boolean hasCompiledCodeForOSR(HotSpotResolvedJavaMethodImpl method, long methodPoiner, int entryBCI, int level); 889 890 /** 891 * Gets the value of {@code symbol} as a String. 892 * 893 * @param symbol a {@code Symbol*} value 894 */ 895 native String getSymbol(long symbol); 896 897 /** 898 * Gets the name for a {@code klass} as it would appear in a signature. 899 * 900 * @param klass a {@code Klass*} value 901 */ 902 native String getSignatureName(long klass); 903 904 /** 905 * @see jdk.vm.ci.code.stack.StackIntrospection#iterateFrames 906 */ 907 native <T> T iterateFrames(ResolvedJavaMethod[] initialMethods, ResolvedJavaMethod[] matchingMethods, int initialSkip, InspectedFrameVisitor<T> visitor); 908 909 /** 910 * Materializes all virtual objects within {@code stackFrame} and updates its locals. 911 * 912 * @param invalidate if {@code true}, the compiled method for the stack frame will be 913 * invalidated 914 */ 915 native void materializeVirtualObjects(HotSpotStackFrameReference stackFrame, boolean invalidate); 916 917 /** 918 * Gets the v-table index for interface method {@code method} in the receiver {@code type} or 919 * {@link HotSpotVMConfig#invalidVtableIndex} if {@code method} is not in {@code type}'s 920 * v-table. 921 * 922 * @throws InternalError if {@code type} is an interface, {@code method} is not defined by an 923 * interface, {@code type} does not implement the interface defining {@code method} 924 * or class represented by {@code type} is not initialized 925 */ 926 int getVtableIndexForInterfaceMethod(HotSpotResolvedObjectTypeImpl type, HotSpotResolvedJavaMethodImpl method) { 927 return getVtableIndexForInterfaceMethod(type, type.getKlassPointer(), method, method.getMethodPointer()); 928 } 929 930 private native int getVtableIndexForInterfaceMethod(HotSpotResolvedObjectTypeImpl type, long klassPointer, HotSpotResolvedJavaMethodImpl method, long methodPointer); 931 932 /** 933 * Determines if debug info should also be emitted at non-safepoint locations. 934 */ 935 native boolean shouldDebugNonSafepoints(); 936 937 /** 938 * Writes {@code length} bytes from {@code buffer} to HotSpot's log stream. 939 * 940 * @param buffer if {@code length <= 8}, then the bytes are encoded in this value in native 941 * endianness order otherwise this is the address of a native memory buffer holding 942 * the bytes 943 * @param flush specifies if the log stream should be flushed after writing 944 */ 945 native void writeDebugOutput(long buffer, int length, boolean flush); 946 947 /** 948 * Flush HotSpot's log stream. 949 */ 950 native void flushDebugOutput(); 951 952 /** 953 * Read a HotSpot {@code Method*} value from the memory location described by {@code base} plus 954 * {@code displacement} and return the {@link HotSpotResolvedJavaMethodImpl} wrapping it. This 955 * method does no checking that the memory location actually contains a valid pointer and may 956 * crash the VM if an invalid location is provided. If {@code base == null} is null then 957 * {@code displacement} is used by itself. If {@code base} is a 958 * {@link HotSpotResolvedJavaMethodImpl}, {@link HotSpotConstantPool} or 959 * {@link HotSpotResolvedObjectTypeImpl} then the metaspace pointer is fetched from that object 960 * and added to {@code displacement}. Any other non-null object type causes an 961 * {@link IllegalArgumentException} to be thrown. 962 * 963 * @param base an object to read from or null 964 * @param displacement 965 * @return null or the resolved method for this location 966 */ 967 native HotSpotResolvedJavaMethodImpl getResolvedJavaMethod(HotSpotObjectConstantImpl base, long displacement); 968 969 /** 970 * Gets the {@code ConstantPool*} associated with {@code object} and returns a 971 * {@link HotSpotConstantPool} wrapping it. 972 * 973 * @param object a {@link HotSpotResolvedJavaMethodImpl} or 974 * {@link HotSpotResolvedObjectTypeImpl} object 975 * @return a {@link HotSpotConstantPool} wrapping the {@code ConstantPool*} associated with 976 * {@code object} 977 * @throws NullPointerException if {@code object == null} 978 * @throws IllegalArgumentException if {@code object} is neither a 979 * {@link HotSpotResolvedJavaMethodImpl} nor a {@link HotSpotResolvedObjectTypeImpl} 980 */ 981 HotSpotConstantPool getConstantPool(MetaspaceObject object) { 982 return getConstantPool(object, object.getMetaspacePointer(), object instanceof HotSpotResolvedJavaType); 983 } 984 985 native HotSpotConstantPool getConstantPool(Object object, long klassOrMethod, boolean isKlass); 986 987 /** 988 * Read a {@code Klass*} value from the memory location described by {@code base} plus 989 * {@code displacement} and return the {@link HotSpotResolvedObjectTypeImpl} wrapping it. This method 990 * only performs the read if the memory location is known to contain a valid Klass*. If 991 * {@code base} is a {@link HotSpotConstantPool}, {@link HotSpotMethodData}, {@link HotSpotObjectConstantImpl}, 992 * or {@link HotSpotResolvedObjectTypeImpl} then the field 993 * corresopnding to {@code displacement} is fetched using the appropriate HotSpot accessor. Any 994 * other object type or an unexpected displacement causes an {@link IllegalArgumentException} to 995 * be thrown. The set of fields which can be read in this fashion corresponds to the {@link VMField} 996 * with type {@code Klass*} that are described in the {@link HotSpotVMConfigStore#getFields()}. 997 * Additionally several injected fields in {@link Class} are also handled. 998 * 999 * @param base an object to read from 1000 * @param displacement 1001 * @param compressed true if the location contains a compressed Klass* 1002 * @return null or the resolved method for this location 1003 * @throws NullPointerException if {@code base == null} 1004 */ 1005 private native HotSpotResolvedObjectTypeImpl getResolvedJavaType0(Object base, long displacement, boolean compressed); 1006 1007 HotSpotResolvedObjectTypeImpl getResolvedJavaType(HotSpotConstantPool base, long displacement) { 1008 return getResolvedJavaType0(base, displacement, false); 1009 } 1010 1011 HotSpotResolvedObjectTypeImpl getResolvedJavaType(HotSpotMethodData base, long displacement) { 1012 return getResolvedJavaType0(base, displacement, false); 1013 } 1014 1015 HotSpotResolvedObjectTypeImpl getResolvedJavaType(HotSpotResolvedObjectTypeImpl base, long displacement, boolean compressed) { 1016 return getResolvedJavaType0(base, displacement, compressed); 1017 } 1018 1019 HotSpotResolvedObjectTypeImpl getResolvedJavaType(HotSpotObjectConstantImpl base, long displacement, boolean compressed) { 1020 return getResolvedJavaType0(base, displacement, compressed); 1021 } 1022 1023 /** 1024 * Reads a {@code Klass*} from {@code address} (i.e., {@code address} is a {@code Klass**} 1025 * value) and wraps it in a {@link HotSpotResolvedObjectTypeImpl}. This VM call must be used for 1026 * any {@code Klass*} value not known to be already wrapped in a 1027 * {@link HotSpotResolvedObjectTypeImpl}. The VM call is necessary so that the {@code Klass*} is 1028 * wrapped in a {@code JVMCIKlassHandle} to protect it from the concurrent scanning done by G1. 1029 */ 1030 HotSpotResolvedObjectTypeImpl getResolvedJavaType(long address) { 1031 return getResolvedJavaType0(null, address, false); 1032 } 1033 1034 /** 1035 * Return the size of the HotSpot ProfileData* pointed at by {@code position}. If 1036 * {@code position} is outside the space of the MethodData then an 1037 * {@link IllegalArgumentException} is thrown. A {@code position} inside the MethodData but that 1038 * isn't pointing at a valid ProfileData will crash the VM. 1039 * 1040 * @param metaspaceMethodData 1041 * @param position 1042 * @return the size of the ProfileData item pointed at by {@code position} 1043 * @throws IllegalArgumentException if an out of range position is given 1044 */ 1045 native int methodDataProfileDataSize(long metaspaceMethodData, int position); 1046 1047 1048 native int methodDataExceptionSeen(long metaspaceMethodData, int bci); 1049 1050 /** 1051 * Return the amount of native stack required for the interpreter frames represented by 1052 * {@code frame}. This is used when emitting the stack banging code to ensure that there is 1053 * enough space for the frames during deoptimization. 1054 * 1055 * @param frame 1056 * @return the number of bytes required for deoptimization of this frame state 1057 */ 1058 native int interpreterFrameSize(BytecodeFrame frame); 1059 1060 /** 1061 * Invokes non-public method {@code java.lang.invoke.LambdaForm.compileToBytecode()} on 1062 * {@code lambdaForm} (which must be a {@code java.lang.invoke.LambdaForm} instance). 1063 */ 1064 native void compileToBytecode(HotSpotObjectConstantImpl lambdaForm); 1065 1066 /** 1067 * Gets the value of the VM flag named {@code name}. 1068 * 1069 * @param name name of a VM option 1070 * @return {@code this} if the named VM option doesn't exist, a {@link String} or {@code null} 1071 * if its type is {@code ccstr} or {@code ccstrlist}, a {@link Double} if its type is 1072 * {@code double}, a {@link Boolean} if its type is {@code bool} otherwise a 1073 * {@link Long} 1074 */ 1075 native Object getFlagValue(String name); 1076 1077 /** 1078 * @see ResolvedJavaType#getInterfaces() 1079 */ 1080 HotSpotResolvedObjectTypeImpl[] getInterfaces(HotSpotResolvedObjectTypeImpl klass) { 1081 return getInterfaces(klass, klass.getKlassPointer()); 1082 } 1083 1084 native HotSpotResolvedObjectTypeImpl[] getInterfaces(HotSpotResolvedObjectTypeImpl klass, long klassPointer); 1085 1086 /** 1087 * @see ResolvedJavaType#getComponentType() 1088 */ 1089 HotSpotResolvedJavaType getComponentType(HotSpotResolvedObjectTypeImpl klass) { 1090 return getComponentType(klass, klass.getKlassPointer()); 1091 } 1092 1093 native HotSpotResolvedJavaType getComponentType(HotSpotResolvedObjectTypeImpl klass, long klassPointer); 1094 1095 /** 1096 * Get the array class for the primitive type represented by the {@link JavaKind#getTypeChar()} 1097 * value in {@code typeChar} or the non-primitive type represented by {@code nonPrimitiveKlass}. 1098 * This can't be done symbolically since hidden classes can't be looked up by name. 1099 * 1100 * Exactly one of {@code primitiveTypeChar} or {@code nonPrimitiveKlass} must be non-zero. 1101 * 1102 * @param primitiveTypeChar a {@link JavaKind#getTypeChar()} value for a primitive type 1103 * @param nonPrimitiveKlass a non-primitive type 1104 */ 1105 HotSpotResolvedObjectTypeImpl getArrayType(char primitiveTypeChar, HotSpotResolvedObjectTypeImpl nonPrimitiveKlass) { 1106 long nonPrimitiveKlassPointer = nonPrimitiveKlass != null ? nonPrimitiveKlass.getKlassPointer() : 0L; 1107 return getArrayType(primitiveTypeChar, nonPrimitiveKlass, nonPrimitiveKlassPointer); 1108 } 1109 1110 native HotSpotResolvedObjectTypeImpl getArrayType(char typeChar, HotSpotResolvedObjectTypeImpl klass, long klassPointer); 1111 1112 /** 1113 * Forces initialization of {@code klass}. 1114 */ 1115 void ensureInitialized(HotSpotResolvedObjectTypeImpl klass) { 1116 ensureInitialized(klass, klass.getKlassPointer()); 1117 } 1118 1119 native void ensureInitialized(HotSpotResolvedObjectTypeImpl klass, long klassPointer); 1120 1121 /** 1122 * Forces linking of {@code klass}. 1123 */ 1124 void ensureLinked(HotSpotResolvedObjectTypeImpl klass) { 1125 ensureLinked(klass, klass.getKlassPointer()); 1126 } 1127 1128 native void ensureLinked(HotSpotResolvedObjectTypeImpl klass, long klassPointer); 1129 1130 /** 1131 * Checks if {@code object} is a String and is an interned string value. 1132 */ 1133 native boolean isInternedString(HotSpotObjectConstantImpl object); 1134 1135 /** 1136 * Gets the {@linkplain System#identityHashCode(Object) identity} has code for the object 1137 * represented by this constant. 1138 */ 1139 native int getIdentityHashCode(HotSpotObjectConstantImpl object); 1140 1141 /** 1142 * Converts a constant object representing a boxed primitive into a boxed primitive. 1143 */ 1144 native Object unboxPrimitive(HotSpotObjectConstantImpl object); 1145 1146 /** 1147 * Converts a boxed primitive into a JavaConstant representing the same value. 1148 */ 1149 native HotSpotObjectConstantImpl boxPrimitive(Object source); 1150 1151 /** 1152 * Gets the {@link ResolvedJavaMethod}s for all the constructors of {@code klass}. 1153 */ 1154 ResolvedJavaMethod[] getDeclaredConstructors(HotSpotResolvedObjectTypeImpl klass) { 1155 return getDeclaredConstructors(klass, klass.getKlassPointer()); 1156 } 1157 1158 native ResolvedJavaMethod[] getDeclaredConstructors(HotSpotResolvedObjectTypeImpl klass, long klassPointer); 1159 1160 /** 1161 * Gets the {@link ResolvedJavaMethod}s for all non-overpass and non-initializer 1162 * methods of {@code klass}. 1163 */ 1164 ResolvedJavaMethod[] getDeclaredMethods(HotSpotResolvedObjectTypeImpl klass) { 1165 return getDeclaredMethods(klass, klass.getKlassPointer()); 1166 } 1167 1168 native ResolvedJavaMethod[] getDeclaredMethods(HotSpotResolvedObjectTypeImpl klass, long klassPointer); 1169 1170 /** 1171 * Gets the {@link ResolvedJavaMethod}s for all methods of {@code klass}. 1172 */ 1173 ResolvedJavaMethod[] getAllMethods(HotSpotResolvedObjectTypeImpl klass) { 1174 return getAllMethods(klass, klass.getKlassPointer()); 1175 } 1176 1177 native ResolvedJavaMethod[] getAllMethods(HotSpotResolvedObjectTypeImpl klass, long klassPointer); 1178 1179 HotSpotResolvedObjectTypeImpl.FieldInfo[] getDeclaredFieldsInfo(HotSpotResolvedObjectTypeImpl klass) { 1180 return getDeclaredFieldsInfo(klass, klass.getKlassPointer()); 1181 } 1182 1183 native HotSpotResolvedObjectTypeImpl.FieldInfo[] getDeclaredFieldsInfo(HotSpotResolvedObjectTypeImpl klass, long klassPointer); 1184 1185 /** 1186 * Reads the current value of a static field of {@code declaringKlass}. Extra sanity checking is 1187 * performed on the offset and kind of the read being performed. 1188 * 1189 * @param declaringKlass the type in which the static field is declared 1190 * @param offset the offset of the field in the {@link Class} mirror of {@code declaringKlass} 1191 * @throws IllegalArgumentException if any of the sanity checks fail 1192 */ 1193 JavaConstant readStaticFieldValue(HotSpotResolvedObjectTypeImpl declaringKlass, long offset, char typeChar) { 1194 return readStaticFieldValue(declaringKlass, declaringKlass.getKlassPointer(), offset, typeChar); 1195 } 1196 1197 native JavaConstant readStaticFieldValue(HotSpotResolvedObjectTypeImpl declaringKlass, long declaringKlassPointer, long offset, char typeChar); 1198 1199 /** 1200 * Reads the current value of an instance field. If {@code expectedType} is non-null, then 1201 * {@code object} is expected to be a subtype of {@code expectedType}. Extra sanity checking is 1202 * performed on the offset and kind of the read being performed. 1203 * 1204 * @param object the object from which the field is to be read. If {@code object} is of type 1205 * {@link Class} and {@code offset} is >= the offset of the static field storage in a 1206 * {@link Class} instance, then this operation is a static field read. 1207 * @param expectedType the expected type of {@code object} 1208 * @throws IllegalArgumentException if any of the sanity checks fail 1209 */ 1210 JavaConstant readFieldValue(HotSpotObjectConstantImpl object, HotSpotResolvedObjectTypeImpl expectedType, long offset, char typeChar) { 1211 long expectedTypePointer = expectedType != null ? expectedType.getKlassPointer() : 0L; 1212 return readFieldValue(object, expectedType, expectedTypePointer, offset, typeChar); 1213 } 1214 1215 native JavaConstant readFieldValue(HotSpotObjectConstantImpl object, HotSpotResolvedObjectTypeImpl expectedType, long expectedTypePointer, long offset, char typeChar); 1216 1217 /** 1218 * @see ResolvedJavaType#isInstance(JavaConstant) 1219 */ 1220 boolean isInstance(HotSpotResolvedObjectTypeImpl klass, HotSpotObjectConstantImpl object) { 1221 return isInstance(klass, klass.getKlassPointer(), object); 1222 } 1223 1224 native boolean isInstance(HotSpotResolvedObjectTypeImpl klass, long klassPointer, HotSpotObjectConstantImpl object); 1225 1226 /** 1227 * @see ResolvedJavaType#isAssignableFrom(ResolvedJavaType) 1228 */ 1229 boolean isAssignableFrom(HotSpotResolvedObjectTypeImpl klass, HotSpotResolvedObjectTypeImpl subklass) { 1230 return isAssignableFrom(klass, klass.getKlassPointer(), subklass, subklass.getKlassPointer()); 1231 } 1232 1233 native boolean isAssignableFrom(HotSpotResolvedObjectTypeImpl klass, long klassPointer, HotSpotResolvedObjectTypeImpl subklass, long subklassPointer); 1234 1235 /** 1236 * @see ConstantReflectionProvider#asJavaType(Constant) 1237 */ 1238 native HotSpotResolvedJavaType asJavaType(HotSpotObjectConstantImpl object); 1239 1240 /** 1241 * Converts a String constant into a String. 1242 */ 1243 native String asString(HotSpotObjectConstantImpl object); 1244 1245 /** 1246 * Compares the contents of {@code xHandle} and {@code yHandle} for pointer equality. 1247 */ 1248 native boolean equals(HotSpotObjectConstantImpl x, long xHandle, HotSpotObjectConstantImpl y, long yHandle); 1249 1250 /** 1251 * Gets a {@link JavaConstant} wrapping the {@link java.lang.Class} mirror for {@code klass}. 1252 */ 1253 HotSpotObjectConstantImpl getJavaMirror(HotSpotResolvedObjectTypeImpl klass) { 1254 return getJavaMirror(klass, klass.getKlassPointer()); 1255 } 1256 1257 native HotSpotObjectConstantImpl getJavaMirror(HotSpotResolvedObjectTypeImpl type, long klassPointer); 1258 1259 /** 1260 * Returns the length of the array if {@code object} represents an array or -1 otherwise. 1261 */ 1262 native int getArrayLength(HotSpotObjectConstantImpl object); 1263 1264 /** 1265 * Reads the element at {@code index} if {@code object} is an array. Elements of an object array 1266 * are returned as {@link JavaConstant}s and primitives are returned as boxed values. The value 1267 * {@code null} is returned if the {@code index} is out of range or object is not an array. 1268 */ 1269 native Object readArrayElement(HotSpotObjectConstantImpl object, int index); 1270 1271 /** 1272 * @see HotSpotJVMCIRuntime#registerNativeMethods 1273 */ 1274 native long[] registerNativeMethods(Class<?> clazz); 1275 1276 /** 1277 * @see HotSpotJVMCIRuntime#translate(Object) 1278 */ 1279 native long translate(Object obj, boolean callPostTranslation); 1280 1281 /** 1282 * @see HotSpotJVMCIRuntime#unhand(Class, long) 1283 */ 1284 native Object unhand(long handle); 1285 1286 /** 1287 * Updates {@code address} and {@code entryPoint} fields of {@code nmethodMirror} based on the 1288 * current state of the {@code nmethod} identified by {@code address} and 1289 * {@code nmethodMirror.compileId} in the code cache. 1290 */ 1291 native void updateHotSpotNmethod(HotSpotNmethod nmethodMirror); 1292 1293 /** 1294 * @see InstalledCode#getCode() 1295 */ 1296 native byte[] getCode(HotSpotInstalledCode code); 1297 1298 /** 1299 * Gets a {@link Executable} corresponding to {@code method}. 1300 */ 1301 Executable asReflectionExecutable(HotSpotResolvedJavaMethodImpl method) { 1302 return asReflectionExecutable(method, method.getMethodPointer()); 1303 } 1304 1305 native Executable asReflectionExecutable(HotSpotResolvedJavaMethodImpl method, long methodPointer); 1306 1307 /** 1308 * Gets a {@link Field} denoted by {@code holder} and {@code index}. 1309 * 1310 * @param holder the class in which the requested field is declared 1311 * @param fieldIndex the {@code fieldDescriptor::index()} denoting the field 1312 */ 1313 Field asReflectionField(HotSpotResolvedObjectTypeImpl holder, int fieldIndex) { 1314 return asReflectionField(holder, holder.getKlassPointer(), fieldIndex); 1315 } 1316 1317 native Field asReflectionField(HotSpotResolvedObjectTypeImpl holder, long holderPointer, int fieldIndex); 1318 1319 /** 1320 * @see HotSpotJVMCIRuntime#getIntrinsificationTrustPredicate(Class...) 1321 */ 1322 boolean isTrustedForIntrinsics(HotSpotResolvedObjectTypeImpl klass) { 1323 return isTrustedForIntrinsics(klass, klass.getKlassPointer()); 1324 } 1325 1326 native boolean isTrustedForIntrinsics(HotSpotResolvedObjectTypeImpl klass, long klassPointer); 1327 1328 /** 1329 * Clears the oop handle in {@code handle}. 1330 */ 1331 native void clearOopHandle(long handle); 1332 1333 /** 1334 * Releases all oop handles whose referent is null. 1335 */ 1336 native void releaseClearedOopHandles(); 1337 1338 /** 1339 * Gets the failed speculations pointed to by {@code *failedSpeculationsAddress}. 1340 * 1341 * @param currentFailures the known failures at {@code failedSpeculationsAddress} 1342 * @return the list of failed speculations with each entry being a single speculation in the 1343 * format emitted by {@link HotSpotSpeculationEncoding#toByteArray()} 1344 */ 1345 native byte[][] getFailedSpeculations(long failedSpeculationsAddress, byte[][] currentFailures); 1346 1347 /** 1348 * Gets the address of the {@code MethodData::_failed_speculations} field in the 1349 * {@code MethodData} associated with {@code method}. This will create and install the 1350 * {@code MethodData} if it didn't already exist. 1351 */ 1352 long getFailedSpeculationsAddress(HotSpotResolvedJavaMethodImpl method) { 1353 return getFailedSpeculationsAddress(method, method.getMethodPointer()); 1354 } 1355 1356 native long getFailedSpeculationsAddress(HotSpotResolvedJavaMethodImpl method, long methodPointer); 1357 1358 /** 1359 * Frees the failed speculations pointed to by {@code *failedSpeculationsAddress}. 1360 */ 1361 native void releaseFailedSpeculations(long failedSpeculationsAddress); 1362 1363 /** 1364 * Adds a speculation to the failed speculations pointed to by 1365 * {@code *failedSpeculationsAddress}. 1366 * 1367 * @return {@code false} if the speculation could not be appended to the list 1368 */ 1369 native boolean addFailedSpeculation(long failedSpeculationsAddress, byte[] speculation); 1370 1371 /** 1372 * @see HotSpotJVMCIRuntime#isCurrentThreadAttached() 1373 */ 1374 native boolean isCurrentThreadAttached(); 1375 1376 /** 1377 * @see HotSpotJVMCIRuntime#getCurrentJavaThread() 1378 */ 1379 native long getCurrentJavaThread(); 1380 1381 /** 1382 * @param name name of current thread if in a native image otherwise {@code null} 1383 * @see HotSpotJVMCIRuntime#attachCurrentThread 1384 */ 1385 native boolean attachCurrentThread(byte[] name, boolean asDaemon, long[] javaVMInfo); 1386 1387 /** 1388 * @see HotSpotJVMCIRuntime#detachCurrentThread 1389 */ 1390 native boolean detachCurrentThread(boolean release); 1391 1392 /** 1393 * @see HotSpotJVMCIRuntime#exitHotSpot(int) 1394 */ 1395 native void callSystemExit(int status); 1396 1397 /** 1398 * @see JFR.Ticks#now 1399 */ 1400 native long ticksNow(); 1401 1402 /** 1403 * @see HotSpotJVMCIRuntime#setThreadLocalObject(int, Object) 1404 */ 1405 native void setThreadLocalObject(int id, Object value); 1406 1407 /** 1408 * @see HotSpotJVMCIRuntime#getThreadLocalObject(int) 1409 */ 1410 native Object getThreadLocalObject(int id); 1411 1412 /** 1413 * @see HotSpotJVMCIRuntime#setThreadLocalLong(int, long) 1414 */ 1415 native void setThreadLocalLong(int id, long value); 1416 1417 /** 1418 * @see HotSpotJVMCIRuntime#getThreadLocalLong(int) 1419 */ 1420 native long getThreadLocalLong(int id); 1421 1422 /** 1423 * Adds phases in HotSpot JFR. 1424 * 1425 * @see JFR.CompilerPhaseEvent#write 1426 */ 1427 native int registerCompilerPhase(String phaseName); 1428 1429 /** 1430 * @see JFR.CompilerPhaseEvent#write 1431 */ 1432 native void notifyCompilerPhaseEvent(long startTime, int phase, int compileId, int level); 1433 1434 /** 1435 * @see JFR.CompilerInliningEvent#write 1436 */ 1437 void notifyCompilerInliningEvent(int compileId, HotSpotResolvedJavaMethodImpl caller, HotSpotResolvedJavaMethodImpl callee, boolean succeeded, String message, int bci) { 1438 notifyCompilerInliningEvent(compileId, caller, caller.getMethodPointer(), callee, callee.getMethodPointer(), succeeded, message, bci); 1439 } 1440 1441 native void notifyCompilerInliningEvent(int compileId, HotSpotResolvedJavaMethodImpl caller, long callerPointer, 1442 HotSpotResolvedJavaMethodImpl callee, long calleePointer, boolean succeeded, String message, int bci); 1443 1444 /** 1445 * Gets the serialized annotation info for {@code type} by calling 1446 * {@code VMSupport.encodeAnnotations} in the HotSpot heap. 1447 */ 1448 byte[] getEncodedClassAnnotationData(HotSpotResolvedObjectTypeImpl type, ResolvedJavaType[] filter) { 1449 try (KlassPointers a = new KlassPointers(filter)) { 1450 return getEncodedClassAnnotationData(type, type.getKlassPointer(), 1451 a.types, a.types.length, a.buffer()); 1452 } 1453 } 1454 1455 native byte[] getEncodedClassAnnotationData(HotSpotResolvedObjectTypeImpl type, long klassPointer, 1456 Object filter, int filterLength, long filterKlassPointers); 1457 1458 /** 1459 * Gets the serialized annotation info for {@code method} by calling 1460 * {@code VMSupport.encodeAnnotations} in the HotSpot heap. 1461 */ 1462 byte[] getEncodedExecutableAnnotationData(HotSpotResolvedJavaMethodImpl method, ResolvedJavaType[] filter) { 1463 try (KlassPointers a = new KlassPointers(filter)) { 1464 return getEncodedExecutableAnnotationData(method, method.getMethodPointer(), 1465 a.types, a.types.length, a.buffer()); 1466 } 1467 } 1468 1469 native byte[] getEncodedExecutableAnnotationData(HotSpotResolvedJavaMethodImpl method, long methodPointer, 1470 Object filter, int filterLength, long filterKlassPointers); 1471 1472 /** 1473 * Gets the serialized annotation info for the field denoted by {@code holder} and 1474 * {@code fieldIndex} by calling {@code VMSupport.encodeAnnotations} in the HotSpot heap. 1475 */ 1476 byte[] getEncodedFieldAnnotationData(HotSpotResolvedObjectTypeImpl holder, int fieldIndex, ResolvedJavaType[] filter) { 1477 try (KlassPointers a = new KlassPointers(filter)) { 1478 return getEncodedFieldAnnotationData(holder, holder.getKlassPointer(), fieldIndex, 1479 a.types, a.types.length, a.buffer()); 1480 } 1481 } 1482 1483 native byte[] getEncodedFieldAnnotationData(HotSpotResolvedObjectTypeImpl holder, long klassPointer, int fieldIndex, 1484 Object filterTypes, int filterLength, long filterKlassPointers); 1485 1486 /** 1487 * Helper for passing {@Klass*} values to native code. 1488 */ 1489 static final class KlassPointers implements AutoCloseable { 1490 final ResolvedJavaType[] types; 1491 long pointersArray; 1492 final Unsafe unsafe = UnsafeAccess.UNSAFE; 1493 1494 KlassPointers(ResolvedJavaType[] types) { 1495 this.types = types; 1496 } 1497 1498 /** 1499 * Gets the buffer in which to pass the {@Klass*} values to JNI. 1500 * 1501 * @return a {@Klass*} value if {@code types.length == 1} otherwise the address of a native 1502 * buffer holding an array of {@Klass*} values 1503 */ 1504 long buffer() { 1505 int length = types.length; 1506 if (length == 1) { 1507 return ((HotSpotResolvedObjectTypeImpl) types[0]).getKlassPointer(); 1508 } else { 1509 pointersArray = unsafe.allocateMemory(length * Long.BYTES); 1510 long pos = pointersArray; 1511 for (int i = 0; i < types.length; i++) { 1512 HotSpotResolvedObjectTypeImpl hsType = (HotSpotResolvedObjectTypeImpl) types[i]; 1513 unsafe.putLong(pos, hsType.getKlassPointer()); 1514 pos += Long.BYTES; 1515 } 1516 } 1517 return pointersArray; 1518 } 1519 1520 @Override 1521 public void close() { 1522 if (types.length != 1 && pointersArray != 0) { 1523 unsafe.freeMemory(pointersArray); 1524 pointersArray = 0; 1525 } 1526 } 1527 } 1528 1529 /** 1530 * @see HotSpotResolvedJavaMethod#getOopMapAt 1531 */ 1532 void getOopMapAt(HotSpotResolvedJavaMethodImpl method, int bci, long[] oopMap) { 1533 getOopMapAt(method, method.getMethodPointer(), bci, oopMap); 1534 } 1535 1536 native void getOopMapAt(HotSpotResolvedJavaMethodImpl method, long methodPointer, int bci, long[] oopMap); 1537 1538 /** 1539 * If the current thread is a CompilerThread associated with a JVMCI compiler where 1540 * newState != CompilerThread::_can_call_java, then _can_call_java is set to newState. 1541 * 1542 * @returns false if no change was made, otherwise true 1543 */ 1544 native boolean updateCompilerThreadCanCallJava(boolean newState); 1545 1546 /** 1547 * Returns the current {@code CompileBroker} compilation activity mode which is one of: 1548 * {@code stop_compilation = 0}, {@code run_compilation = 1} or {@code shutdown_compilation = 2} 1549 */ 1550 native int getCompilationActivityMode(); 1551 1552 /** 1553 * Returns whether the current thread is a CompilerThread. 1554 */ 1555 native boolean isCompilerThread(); 1556 }