1 /* 2 * Copyright (c) 1997, 2020, 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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 #ifndef _JAVASOFT_JVM_H_ 27 #define _JAVASOFT_JVM_H_ 28 29 #include <sys/stat.h> 30 31 #include "jni.h" 32 #include "jvm_md.h" 33 34 #ifdef __cplusplus 35 extern "C" { 36 #endif 37 38 /* 39 * This file contains additional functions exported from the VM. 40 * These functions are complementary to the standard JNI support. 41 * There are three parts to this file: 42 * 43 * First, this file contains the VM-related functions needed by native 44 * libraries in the standard Java API. For example, the java.lang.Object 45 * class needs VM-level functions that wait for and notify monitors. 46 * 47 * Second, this file contains the functions and constant definitions 48 * needed by the byte code verifier and class file format checker. 49 * These functions allow the verifier and format checker to be written 50 * in a VM-independent way. 51 * 52 * Third, this file contains various I/O and network operations needed 53 * by the standard Java I/O and network APIs. 54 */ 55 56 /* 57 * Bump the version number when either of the following happens: 58 * 59 * 1. There is a change in JVM_* functions. 60 * 61 * 2. There is a change in the contract between VM and Java classes. 62 * For example, if the VM relies on a new private field in Thread 63 * class. 64 */ 65 66 #define JVM_INTERFACE_VERSION 6 67 68 JNIEXPORT jint JNICALL 69 JVM_GetInterfaceVersion(void); 70 71 /************************************************************************* 72 PART 1: Functions for Native Libraries 73 ************************************************************************/ 74 /* 75 * java.lang.Object 76 */ 77 JNIEXPORT jint JNICALL 78 JVM_IHashCode(JNIEnv *env, jobject obj); 79 80 JNIEXPORT void JNICALL 81 JVM_MonitorWait(JNIEnv *env, jobject obj, jlong ms); 82 83 JNIEXPORT void JNICALL 84 JVM_MonitorNotify(JNIEnv *env, jobject obj); 85 86 JNIEXPORT void JNICALL 87 JVM_MonitorNotifyAll(JNIEnv *env, jobject obj); 88 89 JNIEXPORT jobject JNICALL 90 JVM_Clone(JNIEnv *env, jobject obj); 91 92 /* 93 * java.lang.String 94 */ 95 JNIEXPORT jstring JNICALL 96 JVM_InternString(JNIEnv *env, jstring str); 97 98 /* 99 * java.lang.System 100 */ 101 JNIEXPORT jlong JNICALL 102 JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored); 103 104 JNIEXPORT jlong JNICALL 105 JVM_NanoTime(JNIEnv *env, jclass ignored); 106 107 JNIEXPORT jlong JNICALL 108 JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs); 109 110 JNIEXPORT void JNICALL 111 JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos, 112 jobject dst, jint dst_pos, jint length); 113 114 /* 115 * Return an array of all properties as alternating name and value pairs. 116 */ 117 JNIEXPORT jobjectArray JNICALL 118 JVM_GetProperties(JNIEnv *env); 119 120 /* 121 * java.lang.Runtime 122 */ 123 JNIEXPORT void JNICALL 124 JVM_BeforeHalt(); 125 126 JNIEXPORT void JNICALL 127 JVM_Halt(jint code); 128 129 JNIEXPORT void JNICALL 130 JVM_GC(void); 131 132 /* Returns the number of real-time milliseconds that have elapsed since the 133 * least-recently-inspected heap object was last inspected by the garbage 134 * collector. 135 * 136 * For simple stop-the-world collectors this value is just the time 137 * since the most recent collection. For generational collectors it is the 138 * time since the oldest generation was most recently collected. Other 139 * collectors are free to return a pessimistic estimate of the elapsed time, or 140 * simply the time since the last full collection was performed. 141 * 142 * Note that in the presence of reference objects, a given object that is no 143 * longer strongly reachable may have to be inspected multiple times before it 144 * can be reclaimed. 145 */ 146 JNIEXPORT jlong JNICALL 147 JVM_MaxObjectInspectionAge(void); 148 149 JNIEXPORT jlong JNICALL 150 JVM_TotalMemory(void); 151 152 JNIEXPORT jlong JNICALL 153 JVM_FreeMemory(void); 154 155 JNIEXPORT jlong JNICALL 156 JVM_MaxMemory(void); 157 158 JNIEXPORT jint JNICALL 159 JVM_ActiveProcessorCount(void); 160 161 JNIEXPORT void * JNICALL 162 JVM_LoadLibrary(const char *name); 163 164 JNIEXPORT void JNICALL 165 JVM_UnloadLibrary(void * handle); 166 167 JNIEXPORT void * JNICALL 168 JVM_FindLibraryEntry(void *handle, const char *name); 169 170 JNIEXPORT jboolean JNICALL 171 JVM_IsSupportedJNIVersion(jint version); 172 173 JNIEXPORT jobjectArray JNICALL 174 JVM_GetVmArguments(JNIEnv *env); 175 176 JNIEXPORT void JNICALL 177 JVM_InitializeFromArchive(JNIEnv* env, jclass cls); 178 179 /* 180 * java.lang.Throwable 181 */ 182 JNIEXPORT void JNICALL 183 JVM_FillInStackTrace(JNIEnv *env, jobject throwable); 184 185 /* 186 * java.lang.StackTraceElement 187 */ 188 JNIEXPORT void JNICALL 189 JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject throwable); 190 191 JNIEXPORT void JNICALL 192 JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo); 193 194 /* 195 * java.lang.NullPointerException 196 */ 197 198 JNIEXPORT jstring JNICALL 199 JVM_GetExtendedNPEMessage(JNIEnv *env, jthrowable throwable); 200 201 /* 202 * java.lang.StackWalker 203 */ 204 enum { 205 JVM_STACKWALK_FILL_CLASS_REFS_ONLY = 0x2, 206 JVM_STACKWALK_GET_CALLER_CLASS = 0x04, 207 JVM_STACKWALK_SHOW_HIDDEN_FRAMES = 0x20, 208 JVM_STACKWALK_FILL_LIVE_STACK_FRAMES = 0x100 209 }; 210 211 JNIEXPORT jobject JNICALL 212 JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jlong mode, 213 jint skip_frames, jint frame_count, jint start_index, 214 jobjectArray frames); 215 216 JNIEXPORT jint JNICALL 217 JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jlong mode, jlong anchor, 218 jint frame_count, jint start_index, 219 jobjectArray frames); 220 221 /* 222 * java.lang.Thread 223 */ 224 JNIEXPORT void JNICALL 225 JVM_StartThread(JNIEnv *env, jobject thread); 226 227 JNIEXPORT void JNICALL 228 JVM_StopThread(JNIEnv *env, jobject thread, jobject exception); 229 230 JNIEXPORT jboolean JNICALL 231 JVM_IsThreadAlive(JNIEnv *env, jobject thread); 232 233 JNIEXPORT void JNICALL 234 JVM_SuspendThread(JNIEnv *env, jobject thread); 235 236 JNIEXPORT void JNICALL 237 JVM_ResumeThread(JNIEnv *env, jobject thread); 238 239 JNIEXPORT void JNICALL 240 JVM_SetThreadPriority(JNIEnv *env, jobject thread, jint prio); 241 242 JNIEXPORT void JNICALL 243 JVM_Yield(JNIEnv *env, jclass threadClass); 244 245 JNIEXPORT void JNICALL 246 JVM_Sleep(JNIEnv *env, jclass threadClass, jlong millis); 247 248 JNIEXPORT jobject JNICALL 249 JVM_CurrentThread(JNIEnv *env, jclass threadClass); 250 251 JNIEXPORT void JNICALL 252 JVM_Interrupt(JNIEnv *env, jobject thread); 253 254 JNIEXPORT jboolean JNICALL 255 JVM_HoldsLock(JNIEnv *env, jclass threadClass, jobject obj); 256 257 JNIEXPORT void JNICALL 258 JVM_DumpAllStacks(JNIEnv *env, jclass unused); 259 260 JNIEXPORT jobjectArray JNICALL 261 JVM_GetAllThreads(JNIEnv *env, jclass dummy); 262 263 JNIEXPORT void JNICALL 264 JVM_SetNativeThreadName(JNIEnv *env, jobject jthread, jstring name); 265 266 /* getStackTrace() and getAllStackTraces() method */ 267 JNIEXPORT jobjectArray JNICALL 268 JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads); 269 270 /* 271 * java.lang.SecurityManager 272 */ 273 JNIEXPORT jobjectArray JNICALL 274 JVM_GetClassContext(JNIEnv *env); 275 276 /* 277 * java.lang.Package 278 */ 279 JNIEXPORT jstring JNICALL 280 JVM_GetSystemPackage(JNIEnv *env, jstring name); 281 282 JNIEXPORT jobjectArray JNICALL 283 JVM_GetSystemPackages(JNIEnv *env); 284 285 /* 286 * java.lang.ref.Reference 287 */ 288 JNIEXPORT jobject JNICALL 289 JVM_GetAndClearReferencePendingList(JNIEnv *env); 290 291 JNIEXPORT jboolean JNICALL 292 JVM_HasReferencePendingList(JNIEnv *env); 293 294 JNIEXPORT void JNICALL 295 JVM_WaitForReferencePendingList(JNIEnv *env); 296 297 /* 298 * java.io.ObjectInputStream 299 */ 300 JNIEXPORT jobject JNICALL 301 JVM_LatestUserDefinedLoader(JNIEnv *env); 302 303 /* 304 * java.lang.reflect.Array 305 */ 306 JNIEXPORT jint JNICALL 307 JVM_GetArrayLength(JNIEnv *env, jobject arr); 308 309 JNIEXPORT jobject JNICALL 310 JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index); 311 312 JNIEXPORT jvalue JNICALL 313 JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode); 314 315 JNIEXPORT void JNICALL 316 JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val); 317 318 JNIEXPORT void JNICALL 319 JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, 320 unsigned char vCode); 321 322 JNIEXPORT jobject JNICALL 323 JVM_NewArray(JNIEnv *env, jclass eltClass, jint length); 324 325 JNIEXPORT jobject JNICALL 326 JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim); 327 328 329 /* 330 * Returns the immediate caller class of the native method invoking 331 * JVM_GetCallerClass. The Method.invoke and other frames due to 332 * reflection machinery are skipped. 333 * 334 * The caller is expected to be marked with 335 * jdk.internal.reflect.CallerSensitive. The JVM will throw an 336 * error if it is not marked properly. 337 */ 338 JNIEXPORT jclass JNICALL 339 JVM_GetCallerClass(JNIEnv *env); 340 341 342 /* 343 * Find primitive classes 344 * utf: class name 345 */ 346 JNIEXPORT jclass JNICALL 347 JVM_FindPrimitiveClass(JNIEnv *env, const char *utf); 348 349 350 /* 351 * Find a class from a boot class loader. Returns NULL if class not found. 352 */ 353 JNIEXPORT jclass JNICALL 354 JVM_FindClassFromBootLoader(JNIEnv *env, const char *name); 355 356 /* 357 * Find a class from a given class loader. Throws ClassNotFoundException. 358 * name: name of class 359 * init: whether initialization is done 360 * loader: class loader to look up the class. This may not be the same as the caller's 361 * class loader. 362 * caller: initiating class. The initiating class may be null when a security 363 * manager is not installed. 364 */ 365 JNIEXPORT jclass JNICALL 366 JVM_FindClassFromCaller(JNIEnv *env, const char *name, jboolean init, 367 jobject loader, jclass caller); 368 369 /* 370 * Find a class from a given class. 371 */ 372 JNIEXPORT jclass JNICALL 373 JVM_FindClassFromClass(JNIEnv *env, const char *name, jboolean init, 374 jclass from); 375 376 /* Find a loaded class cached by the VM */ 377 JNIEXPORT jclass JNICALL 378 JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name); 379 380 /* Define a class */ 381 JNIEXPORT jclass JNICALL 382 JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, 383 jsize len, jobject pd); 384 385 /* Define a class with a source (added in JDK1.5) */ 386 JNIEXPORT jclass JNICALL 387 JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, 388 const jbyte *buf, jsize len, jobject pd, 389 const char *source); 390 391 /* 392 * Define a class with the specified lookup class. 393 * lookup: Lookup class 394 * name: the name of the class 395 * buf: class bytes 396 * len: length of class bytes 397 * pd: protection domain 398 * init: initialize the class 399 * flags: properties of the class 400 * classData: private static pre-initialized field; may be null 401 */ 402 JNIEXPORT jclass JNICALL 403 JVM_LookupDefineClass(JNIEnv *env, jclass lookup, const char *name, const jbyte *buf, 404 jsize len, jobject pd, jboolean init, int flags, jobject classData); 405 406 /* 407 * Module support funcions 408 */ 409 410 /* 411 * Define a module with the specified packages and bind the module to the 412 * given class loader. 413 * module: module to define 414 * is_open: specifies if module is open (currently ignored) 415 * version: the module version 416 * location: the module location 417 * packages: array of packages in the module 418 */ 419 JNIEXPORT void JNICALL 420 JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version, 421 jstring location, jobjectArray packages); 422 423 /* 424 * Set the boot loader's unnamed module. 425 * module: boot loader's unnamed module 426 */ 427 JNIEXPORT void JNICALL 428 JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module); 429 430 /* 431 * Do a qualified export of a package. 432 * from_module: module containing the package to export 433 * package: name of the package to export 434 * to_module: module to export the package to 435 */ 436 JNIEXPORT void JNICALL 437 JVM_AddModuleExports(JNIEnv *env, jobject from_module, jstring package, jobject to_module); 438 439 /* 440 * Do an export of a package to all unnamed modules. 441 * from_module: module containing the package to export 442 * package: name of the package to export to all unnamed modules 443 */ 444 JNIEXPORT void JNICALL 445 JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, jstring package); 446 447 /* 448 * Do an unqualified export of a package. 449 * from_module: module containing the package to export 450 * package: name of the package to export 451 */ 452 JNIEXPORT void JNICALL 453 JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, jstring package); 454 455 /* 456 * Add a module to the list of modules that a given module can read. 457 * from_module: module requesting read access 458 * source_module: module that from_module wants to read 459 */ 460 JNIEXPORT void JNICALL 461 JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module); 462 463 /* 464 * Reflection support functions 465 */ 466 467 JNIEXPORT jstring JNICALL 468 JVM_InitClassName(JNIEnv *env, jclass cls); 469 470 JNIEXPORT jobjectArray JNICALL 471 JVM_GetClassInterfaces(JNIEnv *env, jclass cls); 472 473 JNIEXPORT jboolean JNICALL 474 JVM_IsInterface(JNIEnv *env, jclass cls); 475 476 JNIEXPORT jobjectArray JNICALL 477 JVM_GetClassSigners(JNIEnv *env, jclass cls); 478 479 JNIEXPORT void JNICALL 480 JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers); 481 482 JNIEXPORT jobject JNICALL 483 JVM_GetProtectionDomain(JNIEnv *env, jclass cls); 484 485 JNIEXPORT jboolean JNICALL 486 JVM_IsArrayClass(JNIEnv *env, jclass cls); 487 488 JNIEXPORT jboolean JNICALL 489 JVM_IsPrimitiveClass(JNIEnv *env, jclass cls); 490 491 JNIEXPORT jboolean JNICALL 492 JVM_IsHiddenClass(JNIEnv *env, jclass cls); 493 494 JNIEXPORT jint JNICALL 495 JVM_GetClassModifiers(JNIEnv *env, jclass cls); 496 497 JNIEXPORT jobjectArray JNICALL 498 JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass); 499 500 JNIEXPORT jclass JNICALL 501 JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass); 502 503 JNIEXPORT jstring JNICALL 504 JVM_GetSimpleBinaryName(JNIEnv *env, jclass ofClass); 505 506 /* Generics support (JDK 1.5) */ 507 JNIEXPORT jstring JNICALL 508 JVM_GetClassSignature(JNIEnv *env, jclass cls); 509 510 /* Annotations support (JDK 1.5) */ 511 JNIEXPORT jbyteArray JNICALL 512 JVM_GetClassAnnotations(JNIEnv *env, jclass cls); 513 514 /* Type use annotations support (JDK 1.8) */ 515 516 JNIEXPORT jbyteArray JNICALL 517 JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls); 518 519 JNIEXPORT jbyteArray JNICALL 520 JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field); 521 522 JNIEXPORT jbyteArray JNICALL 523 JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method); 524 525 /* 526 * New (JDK 1.4) reflection implementation 527 */ 528 529 JNIEXPORT jobjectArray JNICALL 530 JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly); 531 532 JNIEXPORT jobjectArray JNICALL 533 JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly); 534 535 JNIEXPORT jobjectArray JNICALL 536 JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly); 537 538 539 /* Differs from JVM_GetClassModifiers in treatment of inner classes. 540 This returns the access flags for the class as specified in the 541 class file rather than searching the InnerClasses attribute (if 542 present) to find the source-level access flags. Only the values of 543 the low 13 bits (i.e., a mask of 0x1FFF) are guaranteed to be 544 valid. */ 545 JNIEXPORT jint JNICALL 546 JVM_GetClassAccessFlags(JNIEnv *env, jclass cls); 547 548 /* Nestmates - since JDK 11 */ 549 550 JNIEXPORT jboolean JNICALL 551 JVM_AreNestMates(JNIEnv *env, jclass current, jclass member); 552 553 JNIEXPORT jclass JNICALL 554 JVM_GetNestHost(JNIEnv *env, jclass current); 555 556 JNIEXPORT jobjectArray JNICALL 557 JVM_GetNestMembers(JNIEnv *env, jclass current); 558 559 /* Records - since JDK 14 */ 560 561 JNIEXPORT jboolean JNICALL 562 JVM_IsRecord(JNIEnv *env, jclass cls); 563 564 JNIEXPORT jobjectArray JNICALL 565 JVM_GetRecordComponents(JNIEnv *env, jclass ofClass); 566 567 /* The following two reflection routines are still needed due to startup time issues */ 568 /* 569 * java.lang.reflect.Method 570 */ 571 JNIEXPORT jobject JNICALL 572 JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0); 573 574 /* 575 * java.lang.reflect.Constructor 576 */ 577 JNIEXPORT jobject JNICALL 578 JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0); 579 580 /* 581 * Constant pool access; currently used to implement reflective access to annotations (JDK 1.5) 582 */ 583 584 JNIEXPORT jobject JNICALL 585 JVM_GetClassConstantPool(JNIEnv *env, jclass cls); 586 587 JNIEXPORT jint JNICALL JVM_ConstantPoolGetSize 588 (JNIEnv *env, jobject unused, jobject jcpool); 589 590 JNIEXPORT jclass JNICALL JVM_ConstantPoolGetClassAt 591 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 592 593 JNIEXPORT jclass JNICALL JVM_ConstantPoolGetClassAtIfLoaded 594 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 595 596 JNIEXPORT jint JNICALL JVM_ConstantPoolGetClassRefIndexAt 597 (JNIEnv *env, jobject obj, jobject unused, jint index); 598 599 JNIEXPORT jobject JNICALL JVM_ConstantPoolGetMethodAt 600 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 601 602 JNIEXPORT jobject JNICALL JVM_ConstantPoolGetMethodAtIfLoaded 603 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 604 605 JNIEXPORT jobject JNICALL JVM_ConstantPoolGetFieldAt 606 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 607 608 JNIEXPORT jobject JNICALL JVM_ConstantPoolGetFieldAtIfLoaded 609 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 610 611 JNIEXPORT jobjectArray JNICALL JVM_ConstantPoolGetMemberRefInfoAt 612 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 613 614 JNIEXPORT jint JNICALL JVM_ConstantPoolGetNameAndTypeRefIndexAt 615 (JNIEnv *env, jobject obj, jobject unused, jint index); 616 617 JNIEXPORT jobjectArray JNICALL JVM_ConstantPoolGetNameAndTypeRefInfoAt 618 (JNIEnv *env, jobject obj, jobject unused, jint index); 619 620 JNIEXPORT jint JNICALL JVM_ConstantPoolGetIntAt 621 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 622 623 JNIEXPORT jlong JNICALL JVM_ConstantPoolGetLongAt 624 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 625 626 JNIEXPORT jfloat JNICALL JVM_ConstantPoolGetFloatAt 627 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 628 629 JNIEXPORT jdouble JNICALL JVM_ConstantPoolGetDoubleAt 630 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 631 632 JNIEXPORT jstring JNICALL JVM_ConstantPoolGetStringAt 633 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 634 635 JNIEXPORT jstring JNICALL JVM_ConstantPoolGetUTF8At 636 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 637 638 JNIEXPORT jbyte JNICALL JVM_ConstantPoolGetTagAt 639 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 640 641 /* 642 * Parameter reflection 643 */ 644 645 JNIEXPORT jobjectArray JNICALL 646 JVM_GetMethodParameters(JNIEnv *env, jobject method); 647 648 /* 649 * java.security.* 650 */ 651 652 JNIEXPORT jobject JNICALL 653 JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls); 654 655 /* 656 * Ensure that code doing a stackwalk and using javaVFrame::locals() to 657 * get the value will see a materialized value and not a scalar-replaced 658 * null value. 659 */ 660 #define JVM_EnsureMaterializedForStackWalk(env, value) \ 661 do {} while(0) // Nothing to do. The fact that the value escaped 662 // through a native method is enough. 663 664 JNIEXPORT jobject JNICALL 665 JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls); 666 667 /* 668 * Signal support, used to implement the shutdown sequence. Every VM must 669 * support JVM_SIGINT and JVM_SIGTERM, raising the former for user interrupts 670 * (^C) and the latter for external termination (kill, system shutdown, etc.). 671 * Other platform-dependent signal values may also be supported. 672 */ 673 674 JNIEXPORT void * JNICALL 675 JVM_RegisterSignal(jint sig, void *handler); 676 677 JNIEXPORT jboolean JNICALL 678 JVM_RaiseSignal(jint sig); 679 680 JNIEXPORT jint JNICALL 681 JVM_FindSignal(const char *name); 682 683 /* 684 * Retrieve the assertion directives for the specified class. 685 */ 686 JNIEXPORT jboolean JNICALL 687 JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls); 688 689 /* 690 * Retrieve the assertion directives from the VM. 691 */ 692 JNIEXPORT jobject JNICALL 693 JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused); 694 695 /* 696 * java.util.concurrent.atomic.AtomicLong 697 */ 698 JNIEXPORT jboolean JNICALL 699 JVM_SupportsCX8(void); 700 701 /* 702 * com.sun.dtrace.jsdt support 703 */ 704 705 #define JVM_TRACING_DTRACE_VERSION 1 706 707 /* 708 * Structure to pass one probe description to JVM 709 */ 710 typedef struct { 711 jmethodID method; 712 jstring function; 713 jstring name; 714 void* reserved[4]; // for future use 715 } JVM_DTraceProbe; 716 717 /** 718 * Encapsulates the stability ratings for a DTrace provider field 719 */ 720 typedef struct { 721 jint nameStability; 722 jint dataStability; 723 jint dependencyClass; 724 } JVM_DTraceInterfaceAttributes; 725 726 /* 727 * Structure to pass one provider description to JVM 728 */ 729 typedef struct { 730 jstring name; 731 JVM_DTraceProbe* probes; 732 jint probe_count; 733 JVM_DTraceInterfaceAttributes providerAttributes; 734 JVM_DTraceInterfaceAttributes moduleAttributes; 735 JVM_DTraceInterfaceAttributes functionAttributes; 736 JVM_DTraceInterfaceAttributes nameAttributes; 737 JVM_DTraceInterfaceAttributes argsAttributes; 738 void* reserved[4]; // for future use 739 } JVM_DTraceProvider; 740 741 /* 742 * Get the version number the JVM was built with 743 */ 744 JNIEXPORT jint JNICALL 745 JVM_DTraceGetVersion(JNIEnv* env); 746 747 /* 748 * Register new probe with given signature, return global handle 749 * 750 * The version passed in is the version that the library code was 751 * built with. 752 */ 753 JNIEXPORT jlong JNICALL 754 JVM_DTraceActivate(JNIEnv* env, jint version, jstring module_name, 755 jint providers_count, JVM_DTraceProvider* providers); 756 757 /* 758 * Check JSDT probe 759 */ 760 JNIEXPORT jboolean JNICALL 761 JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method); 762 763 /* 764 * Destroy custom DOF 765 */ 766 JNIEXPORT void JNICALL 767 JVM_DTraceDispose(JNIEnv* env, jlong activation_handle); 768 769 /* 770 * Check to see if DTrace is supported by OS 771 */ 772 JNIEXPORT jboolean JNICALL 773 JVM_DTraceIsSupported(JNIEnv* env); 774 775 /************************************************************************* 776 PART 2: Support for the Verifier and Class File Format Checker 777 ************************************************************************/ 778 /* 779 * Return the class name in UTF format. The result is valid 780 * until JVM_ReleaseUTf is called. 781 * 782 * The caller must treat the string as a constant and not modify it 783 * in any way. 784 */ 785 JNIEXPORT const char * JNICALL 786 JVM_GetClassNameUTF(JNIEnv *env, jclass cb); 787 788 /* 789 * Returns the constant pool types in the buffer provided by "types." 790 */ 791 JNIEXPORT void JNICALL 792 JVM_GetClassCPTypes(JNIEnv *env, jclass cb, unsigned char *types); 793 794 /* 795 * Returns the number of Constant Pool entries. 796 */ 797 JNIEXPORT jint JNICALL 798 JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cb); 799 800 /* 801 * Returns the number of *declared* fields or methods. 802 */ 803 JNIEXPORT jint JNICALL 804 JVM_GetClassFieldsCount(JNIEnv *env, jclass cb); 805 806 JNIEXPORT jint JNICALL 807 JVM_GetClassMethodsCount(JNIEnv *env, jclass cb); 808 809 /* 810 * Returns the CP indexes of exceptions raised by a given method. 811 * Places the result in the given buffer. 812 * 813 * The method is identified by method_index. 814 */ 815 JNIEXPORT void JNICALL 816 JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cb, jint method_index, 817 unsigned short *exceptions); 818 /* 819 * Returns the number of exceptions raised by a given method. 820 * The method is identified by method_index. 821 */ 822 JNIEXPORT jint JNICALL 823 JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cb, jint method_index); 824 825 /* 826 * Returns the byte code sequence of a given method. 827 * Places the result in the given buffer. 828 * 829 * The method is identified by method_index. 830 */ 831 JNIEXPORT void JNICALL 832 JVM_GetMethodIxByteCode(JNIEnv *env, jclass cb, jint method_index, 833 unsigned char *code); 834 835 /* 836 * Returns the length of the byte code sequence of a given method. 837 * The method is identified by method_index. 838 */ 839 JNIEXPORT jint JNICALL 840 JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cb, jint method_index); 841 842 /* 843 * A structure used to a capture exception table entry in a Java method. 844 */ 845 typedef struct { 846 jint start_pc; 847 jint end_pc; 848 jint handler_pc; 849 jint catchType; 850 } JVM_ExceptionTableEntryType; 851 852 /* 853 * Returns the exception table entry at entry_index of a given method. 854 * Places the result in the given buffer. 855 * 856 * The method is identified by method_index. 857 */ 858 JNIEXPORT void JNICALL 859 JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cb, jint method_index, 860 jint entry_index, 861 JVM_ExceptionTableEntryType *entry); 862 863 /* 864 * Returns the length of the exception table of a given method. 865 * The method is identified by method_index. 866 */ 867 JNIEXPORT jint JNICALL 868 JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cb, int index); 869 870 /* 871 * Returns the modifiers of a given field. 872 * The field is identified by field_index. 873 */ 874 JNIEXPORT jint JNICALL 875 JVM_GetFieldIxModifiers(JNIEnv *env, jclass cb, int index); 876 877 /* 878 * Returns the modifiers of a given method. 879 * The method is identified by method_index. 880 */ 881 JNIEXPORT jint JNICALL 882 JVM_GetMethodIxModifiers(JNIEnv *env, jclass cb, int index); 883 884 /* 885 * Returns the number of local variables of a given method. 886 * The method is identified by method_index. 887 */ 888 JNIEXPORT jint JNICALL 889 JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cb, int index); 890 891 /* 892 * Returns the number of arguments (including this pointer) of a given method. 893 * The method is identified by method_index. 894 */ 895 JNIEXPORT jint JNICALL 896 JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cb, int index); 897 898 /* 899 * Returns the maximum amount of stack (in words) used by a given method. 900 * The method is identified by method_index. 901 */ 902 JNIEXPORT jint JNICALL 903 JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cb, int index); 904 905 /* 906 * Is a given method a constructor. 907 * The method is identified by method_index. 908 */ 909 JNIEXPORT jboolean JNICALL 910 JVM_IsConstructorIx(JNIEnv *env, jclass cb, int index); 911 912 /* 913 * Is the given method generated by the VM. 914 * The method is identified by method_index. 915 */ 916 JNIEXPORT jboolean JNICALL 917 JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cb, int index); 918 919 /* 920 * Returns the name of a given method in UTF format. 921 * The result remains valid until JVM_ReleaseUTF is called. 922 * 923 * The caller must treat the string as a constant and not modify it 924 * in any way. 925 */ 926 JNIEXPORT const char * JNICALL 927 JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cb, jint index); 928 929 /* 930 * Returns the signature of a given method in UTF format. 931 * The result remains valid until JVM_ReleaseUTF is called. 932 * 933 * The caller must treat the string as a constant and not modify it 934 * in any way. 935 */ 936 JNIEXPORT const char * JNICALL 937 JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cb, jint index); 938 939 /* 940 * Returns the name of the field referred to at a given constant pool 941 * index. 942 * 943 * The result is in UTF format and remains valid until JVM_ReleaseUTF 944 * is called. 945 * 946 * The caller must treat the string as a constant and not modify it 947 * in any way. 948 */ 949 JNIEXPORT const char * JNICALL 950 JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cb, jint index); 951 952 /* 953 * Returns the name of the method referred to at a given constant pool 954 * index. 955 * 956 * The result is in UTF format and remains valid until JVM_ReleaseUTF 957 * is called. 958 * 959 * The caller must treat the string as a constant and not modify it 960 * in any way. 961 */ 962 JNIEXPORT const char * JNICALL 963 JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cb, jint index); 964 965 /* 966 * Returns the signature of the method referred to at a given constant pool 967 * index. 968 * 969 * The result is in UTF format and remains valid until JVM_ReleaseUTF 970 * is called. 971 * 972 * The caller must treat the string as a constant and not modify it 973 * in any way. 974 */ 975 JNIEXPORT const char * JNICALL 976 JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cb, jint index); 977 978 /* 979 * Returns the signature of the field referred to at a given constant pool 980 * index. 981 * 982 * The result is in UTF format and remains valid until JVM_ReleaseUTF 983 * is called. 984 * 985 * The caller must treat the string as a constant and not modify it 986 * in any way. 987 */ 988 JNIEXPORT const char * JNICALL 989 JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cb, jint index); 990 991 /* 992 * Returns the class name referred to at a given constant pool index. 993 * 994 * The result is in UTF format and remains valid until JVM_ReleaseUTF 995 * is called. 996 * 997 * The caller must treat the string as a constant and not modify it 998 * in any way. 999 */ 1000 JNIEXPORT const char * JNICALL 1001 JVM_GetCPClassNameUTF(JNIEnv *env, jclass cb, jint index); 1002 1003 /* 1004 * Returns the class name referred to at a given constant pool index. 1005 * 1006 * The constant pool entry must refer to a CONSTANT_Fieldref. 1007 * 1008 * The result is in UTF format and remains valid until JVM_ReleaseUTF 1009 * is called. 1010 * 1011 * The caller must treat the string as a constant and not modify it 1012 * in any way. 1013 */ 1014 JNIEXPORT const char * JNICALL 1015 JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cb, jint index); 1016 1017 /* 1018 * Returns the class name referred to at a given constant pool index. 1019 * 1020 * The constant pool entry must refer to CONSTANT_Methodref or 1021 * CONSTANT_InterfaceMethodref. 1022 * 1023 * The result is in UTF format and remains valid until JVM_ReleaseUTF 1024 * is called. 1025 * 1026 * The caller must treat the string as a constant and not modify it 1027 * in any way. 1028 */ 1029 JNIEXPORT const char * JNICALL 1030 JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cb, jint index); 1031 1032 /* 1033 * Returns the modifiers of a field in calledClass. The field is 1034 * referred to in class cb at constant pool entry index. 1035 * 1036 * The caller must treat the string as a constant and not modify it 1037 * in any way. 1038 * 1039 * Returns -1 if the field does not exist in calledClass. 1040 */ 1041 JNIEXPORT jint JNICALL 1042 JVM_GetCPFieldModifiers(JNIEnv *env, jclass cb, int index, jclass calledClass); 1043 1044 /* 1045 * Returns the modifiers of a method in calledClass. The method is 1046 * referred to in class cb at constant pool entry index. 1047 * 1048 * Returns -1 if the method does not exist in calledClass. 1049 */ 1050 JNIEXPORT jint JNICALL 1051 JVM_GetCPMethodModifiers(JNIEnv *env, jclass cb, int index, jclass calledClass); 1052 1053 /* 1054 * Releases the UTF string obtained from the VM. 1055 */ 1056 JNIEXPORT void JNICALL 1057 JVM_ReleaseUTF(const char *utf); 1058 1059 /* 1060 * Compare if two classes are in the same package. 1061 */ 1062 JNIEXPORT jboolean JNICALL 1063 JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2); 1064 1065 /* Get classfile constants */ 1066 #include "classfile_constants.h" 1067 1068 /* 1069 * Support for a VM-independent class format checker. 1070 */ 1071 typedef struct { 1072 unsigned long code; /* byte code */ 1073 unsigned long excs; /* exceptions */ 1074 unsigned long etab; /* catch table */ 1075 unsigned long lnum; /* line number */ 1076 unsigned long lvar; /* local vars */ 1077 } method_size_info; 1078 1079 typedef struct { 1080 unsigned int constants; /* constant pool */ 1081 unsigned int fields; 1082 unsigned int methods; 1083 unsigned int interfaces; 1084 unsigned int fields2; /* number of static 2-word fields */ 1085 unsigned int innerclasses; /* # of records in InnerClasses attr */ 1086 1087 method_size_info clinit; /* memory used in clinit */ 1088 method_size_info main; /* used everywhere else */ 1089 } class_size_info; 1090 1091 #define JVM_RECOGNIZED_CLASS_MODIFIERS (JVM_ACC_PUBLIC | \ 1092 JVM_ACC_FINAL | \ 1093 JVM_ACC_SUPER | \ 1094 JVM_ACC_INTERFACE | \ 1095 JVM_ACC_ABSTRACT | \ 1096 JVM_ACC_ANNOTATION | \ 1097 JVM_ACC_ENUM | \ 1098 JVM_ACC_SYNTHETIC) 1099 1100 #define JVM_RECOGNIZED_FIELD_MODIFIERS (JVM_ACC_PUBLIC | \ 1101 JVM_ACC_PRIVATE | \ 1102 JVM_ACC_PROTECTED | \ 1103 JVM_ACC_STATIC | \ 1104 JVM_ACC_FINAL | \ 1105 JVM_ACC_VOLATILE | \ 1106 JVM_ACC_TRANSIENT | \ 1107 JVM_ACC_ENUM | \ 1108 JVM_ACC_SYNTHETIC) 1109 1110 #define JVM_RECOGNIZED_METHOD_MODIFIERS (JVM_ACC_PUBLIC | \ 1111 JVM_ACC_PRIVATE | \ 1112 JVM_ACC_PROTECTED | \ 1113 JVM_ACC_STATIC | \ 1114 JVM_ACC_FINAL | \ 1115 JVM_ACC_SYNCHRONIZED | \ 1116 JVM_ACC_BRIDGE | \ 1117 JVM_ACC_VARARGS | \ 1118 JVM_ACC_NATIVE | \ 1119 JVM_ACC_ABSTRACT | \ 1120 JVM_ACC_STRICT | \ 1121 JVM_ACC_SYNTHETIC) 1122 1123 1124 /************************************************************************* 1125 PART 3: I/O and Network Support 1126 ************************************************************************/ 1127 1128 /* 1129 * Convert a pathname into native format. This function does syntactic 1130 * cleanup, such as removing redundant separator characters. It modifies 1131 * the given pathname string in place. 1132 */ 1133 JNIEXPORT char * JNICALL 1134 JVM_NativePath(char *); 1135 1136 /* 1137 * The standard printing functions supported by the Java VM. (Should they 1138 * be renamed to JVM_* in the future? 1139 */ 1140 1141 /* jio_snprintf() and jio_vsnprintf() behave like snprintf(3) and vsnprintf(3), 1142 * respectively, with the following differences: 1143 * - The string written to str is always zero-terminated, also in case of 1144 * truncation (count is too small to hold the result string), unless count 1145 * is 0. In case of truncation count-1 characters are written and '\0' 1146 * appendend. 1147 * - If count is too small to hold the whole string, -1 is returned across 1148 * all platforms. */ 1149 1150 JNIEXPORT int 1151 jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args); 1152 1153 JNIEXPORT int 1154 jio_snprintf(char *str, size_t count, const char *fmt, ...); 1155 1156 JNIEXPORT int 1157 jio_fprintf(FILE *, const char *fmt, ...); 1158 1159 JNIEXPORT int 1160 jio_vfprintf(FILE *, const char *fmt, va_list args); 1161 1162 1163 JNIEXPORT void * JNICALL 1164 JVM_RawMonitorCreate(void); 1165 1166 JNIEXPORT void JNICALL 1167 JVM_RawMonitorDestroy(void *mon); 1168 1169 JNIEXPORT jint JNICALL 1170 JVM_RawMonitorEnter(void *mon); 1171 1172 JNIEXPORT void JNICALL 1173 JVM_RawMonitorExit(void *mon); 1174 1175 /* 1176 * java.lang.management support 1177 */ 1178 JNIEXPORT void* JNICALL 1179 JVM_GetManagement(jint version); 1180 1181 /* 1182 * com.sun.tools.attach.VirtualMachine support 1183 * 1184 * Initialize the agent properties with the properties maintained in the VM. 1185 */ 1186 JNIEXPORT jobject JNICALL 1187 JVM_InitAgentProperties(JNIEnv *env, jobject agent_props); 1188 1189 JNIEXPORT jstring JNICALL 1190 JVM_GetTemporaryDirectory(JNIEnv *env); 1191 1192 /* Generics reflection support. 1193 * 1194 * Returns information about the given class's EnclosingMethod 1195 * attribute, if present, or null if the class had no enclosing 1196 * method. 1197 * 1198 * If non-null, the returned array contains three elements. Element 0 1199 * is the java.lang.Class of which the enclosing method is a member, 1200 * and elements 1 and 2 are the java.lang.Strings for the enclosing 1201 * method's name and descriptor, respectively. 1202 */ 1203 JNIEXPORT jobjectArray JNICALL 1204 JVM_GetEnclosingMethodInfo(JNIEnv* env, jclass ofClass); 1205 1206 /* 1207 * This structure is used by the launcher to get the default thread 1208 * stack size from the VM using JNI_GetDefaultJavaVMInitArgs() with a 1209 * version of 1.1. As it is not supported otherwise, it has been removed 1210 * from jni.h 1211 */ 1212 typedef struct JDK1_1InitArgs { 1213 jint version; 1214 1215 char **properties; 1216 jint checkSource; 1217 jint nativeStackSize; 1218 jint javaStackSize; 1219 jint minHeapSize; 1220 jint maxHeapSize; 1221 jint verifyMode; 1222 char *classpath; 1223 1224 jint (JNICALL *vfprintf)(FILE *fp, const char *format, va_list args); 1225 void (JNICALL *exit)(jint code); 1226 void (JNICALL *abort)(void); 1227 1228 jint enableClassGC; 1229 jint enableVerboseGC; 1230 jint disableAsyncGC; 1231 jint verbose; 1232 jboolean debugging; 1233 jint debugPort; 1234 } JDK1_1InitArgs; 1235 1236 1237 #ifdef __cplusplus 1238 } /* extern "C" */ 1239 1240 #endif /* __cplusplus */ 1241 1242 #endif /* !_JAVASOFT_JVM_H_ */