1 /* 2 * Copyright (c) 1997, 2019, 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 * Module support funcions 393 */ 394 395 /* 396 * Define a module with the specified packages and bind the module to the 397 * given class loader. 398 * module: module to define 399 * is_open: specifies if module is open (currently ignored) 400 * version: the module version 401 * location: the module location 402 * packages: list of packages in the module 403 * num_packages: number of packages in the module 404 */ 405 JNIEXPORT void JNICALL 406 JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version, 407 jstring location, const char* const* packages, jsize num_packages); 408 409 /* 410 * Set the boot loader's unnamed module. 411 * module: boot loader's unnamed module 412 */ 413 JNIEXPORT void JNICALL 414 JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module); 415 416 /* 417 * Do a qualified export of a package. 418 * from_module: module containing the package to export 419 * package: name of the package to export 420 * to_module: module to export the package to 421 */ 422 JNIEXPORT void JNICALL 423 JVM_AddModuleExports(JNIEnv *env, jobject from_module, const char* package, jobject to_module); 424 425 /* 426 * Do an export of a package to all unnamed modules. 427 * from_module: module containing the package to export 428 * package: name of the package to export to all unnamed modules 429 */ 430 JNIEXPORT void JNICALL 431 JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, const char* package); 432 433 /* 434 * Do an unqualified export of a package. 435 * from_module: module containing the package to export 436 * package: name of the package to export 437 */ 438 JNIEXPORT void JNICALL 439 JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, const char* package); 440 441 /* 442 * Add a module to the list of modules that a given module can read. 443 * from_module: module requesting read access 444 * source_module: module that from_module wants to read 445 */ 446 JNIEXPORT void JNICALL 447 JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module); 448 449 /* 450 * Reflection support functions 451 */ 452 453 JNIEXPORT jstring JNICALL 454 JVM_InitClassName(JNIEnv *env, jclass cls); 455 456 JNIEXPORT jobjectArray JNICALL 457 JVM_GetClassInterfaces(JNIEnv *env, jclass cls); 458 459 JNIEXPORT jboolean JNICALL 460 JVM_IsInterface(JNIEnv *env, jclass cls); 461 462 JNIEXPORT jobjectArray JNICALL 463 JVM_GetClassSigners(JNIEnv *env, jclass cls); 464 465 JNIEXPORT void JNICALL 466 JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers); 467 468 JNIEXPORT jobject JNICALL 469 JVM_GetProtectionDomain(JNIEnv *env, jclass cls); 470 471 JNIEXPORT jboolean JNICALL 472 JVM_IsArrayClass(JNIEnv *env, jclass cls); 473 474 JNIEXPORT jboolean JNICALL 475 JVM_IsPrimitiveClass(JNIEnv *env, jclass cls); 476 477 JNIEXPORT jint JNICALL 478 JVM_GetClassModifiers(JNIEnv *env, jclass cls); 479 480 JNIEXPORT jobjectArray JNICALL 481 JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass); 482 483 JNIEXPORT jclass JNICALL 484 JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass); 485 486 JNIEXPORT jstring JNICALL 487 JVM_GetSimpleBinaryName(JNIEnv *env, jclass ofClass); 488 489 /* Generics support (JDK 1.5) */ 490 JNIEXPORT jstring JNICALL 491 JVM_GetClassSignature(JNIEnv *env, jclass cls); 492 493 /* Annotations support (JDK 1.5) */ 494 JNIEXPORT jbyteArray JNICALL 495 JVM_GetClassAnnotations(JNIEnv *env, jclass cls); 496 497 /* Type use annotations support (JDK 1.8) */ 498 499 JNIEXPORT jbyteArray JNICALL 500 JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls); 501 502 JNIEXPORT jbyteArray JNICALL 503 JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field); 504 505 JNIEXPORT jbyteArray JNICALL 506 JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method); 507 508 /* 509 * New (JDK 1.4) reflection implementation 510 */ 511 512 JNIEXPORT jobjectArray JNICALL 513 JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly); 514 515 JNIEXPORT jobjectArray JNICALL 516 JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly); 517 518 JNIEXPORT jobjectArray JNICALL 519 JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly); 520 521 /* Differs from JVM_GetClassModifiers in treatment of inner classes. 522 This returns the access flags for the class as specified in the 523 class file rather than searching the InnerClasses attribute (if 524 present) to find the source-level access flags. Only the values of 525 the low 13 bits (i.e., a mask of 0x1FFF) are guaranteed to be 526 valid. */ 527 JNIEXPORT jint JNICALL 528 JVM_GetClassAccessFlags(JNIEnv *env, jclass cls); 529 530 /* Nestmates - since JDK 11 */ 531 532 JNIEXPORT jboolean JNICALL 533 JVM_AreNestMates(JNIEnv *env, jclass current, jclass member); 534 535 JNIEXPORT jclass JNICALL 536 JVM_GetNestHost(JNIEnv *env, jclass current); 537 538 JNIEXPORT jobjectArray JNICALL 539 JVM_GetNestMembers(JNIEnv *env, jclass current); 540 541 /* The following two reflection routines are still needed due to startup time issues */ 542 /* 543 * java.lang.reflect.Method 544 */ 545 JNIEXPORT jobject JNICALL 546 JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0); 547 548 /* 549 * java.lang.reflect.Constructor 550 */ 551 JNIEXPORT jobject JNICALL 552 JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0); 553 554 /* 555 * Constant pool access; currently used to implement reflective access to annotations (JDK 1.5) 556 */ 557 558 JNIEXPORT jobject JNICALL 559 JVM_GetClassConstantPool(JNIEnv *env, jclass cls); 560 561 JNIEXPORT jint JNICALL JVM_ConstantPoolGetSize 562 (JNIEnv *env, jobject unused, jobject jcpool); 563 564 JNIEXPORT jclass JNICALL JVM_ConstantPoolGetClassAt 565 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 566 567 JNIEXPORT jclass JNICALL JVM_ConstantPoolGetClassAtIfLoaded 568 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 569 570 JNIEXPORT jint JNICALL JVM_ConstantPoolGetClassRefIndexAt 571 (JNIEnv *env, jobject obj, jobject unused, jint index); 572 573 JNIEXPORT jobject JNICALL JVM_ConstantPoolGetMethodAt 574 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 575 576 JNIEXPORT jobject JNICALL JVM_ConstantPoolGetMethodAtIfLoaded 577 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 578 579 JNIEXPORT jobject JNICALL JVM_ConstantPoolGetFieldAt 580 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 581 582 JNIEXPORT jobject JNICALL JVM_ConstantPoolGetFieldAtIfLoaded 583 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 584 585 JNIEXPORT jobjectArray JNICALL JVM_ConstantPoolGetMemberRefInfoAt 586 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 587 588 JNIEXPORT jint JNICALL JVM_ConstantPoolGetNameAndTypeRefIndexAt 589 (JNIEnv *env, jobject obj, jobject unused, jint index); 590 591 JNIEXPORT jobjectArray JNICALL JVM_ConstantPoolGetNameAndTypeRefInfoAt 592 (JNIEnv *env, jobject obj, jobject unused, jint index); 593 594 JNIEXPORT jint JNICALL JVM_ConstantPoolGetIntAt 595 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 596 597 JNIEXPORT jlong JNICALL JVM_ConstantPoolGetLongAt 598 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 599 600 JNIEXPORT jfloat JNICALL JVM_ConstantPoolGetFloatAt 601 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 602 603 JNIEXPORT jdouble JNICALL JVM_ConstantPoolGetDoubleAt 604 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 605 606 JNIEXPORT jstring JNICALL JVM_ConstantPoolGetStringAt 607 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 608 609 JNIEXPORT jstring JNICALL JVM_ConstantPoolGetUTF8At 610 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 611 612 JNIEXPORT jbyte JNICALL JVM_ConstantPoolGetTagAt 613 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 614 615 /* 616 * Parameter reflection 617 */ 618 619 JNIEXPORT jobjectArray JNICALL 620 JVM_GetMethodParameters(JNIEnv *env, jobject method); 621 622 /* 623 * java.security.* 624 */ 625 626 JNIEXPORT jobject JNICALL 627 JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls); 628 629 /* 630 * Ensure that code doing a stackwalk and using javaVFrame::locals() to 631 * get the value will see a materialized value and not a scalar-replaced 632 * null value. 633 */ 634 #define JVM_EnsureMaterializedForStackWalk(env, value) \ 635 do {} while(0) // Nothing to do. The fact that the value escaped 636 // through a native method is enough. 637 638 JNIEXPORT jobject JNICALL 639 JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls); 640 641 /* 642 * Signal support, used to implement the shutdown sequence. Every VM must 643 * support JVM_SIGINT and JVM_SIGTERM, raising the former for user interrupts 644 * (^C) and the latter for external termination (kill, system shutdown, etc.). 645 * Other platform-dependent signal values may also be supported. 646 */ 647 648 JNIEXPORT void * JNICALL 649 JVM_RegisterSignal(jint sig, void *handler); 650 651 JNIEXPORT jboolean JNICALL 652 JVM_RaiseSignal(jint sig); 653 654 JNIEXPORT jint JNICALL 655 JVM_FindSignal(const char *name); 656 657 /* 658 * Retrieve the assertion directives for the specified class. 659 */ 660 JNIEXPORT jboolean JNICALL 661 JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls); 662 663 /* 664 * Retrieve the assertion directives from the VM. 665 */ 666 JNIEXPORT jobject JNICALL 667 JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused); 668 669 /* 670 * java.util.concurrent.atomic.AtomicLong 671 */ 672 JNIEXPORT jboolean JNICALL 673 JVM_SupportsCX8(void); 674 675 /* 676 * com.sun.dtrace.jsdt support 677 */ 678 679 #define JVM_TRACING_DTRACE_VERSION 1 680 681 /* 682 * Structure to pass one probe description to JVM 683 */ 684 typedef struct { 685 jmethodID method; 686 jstring function; 687 jstring name; 688 void* reserved[4]; // for future use 689 } JVM_DTraceProbe; 690 691 /** 692 * Encapsulates the stability ratings for a DTrace provider field 693 */ 694 typedef struct { 695 jint nameStability; 696 jint dataStability; 697 jint dependencyClass; 698 } JVM_DTraceInterfaceAttributes; 699 700 /* 701 * Structure to pass one provider description to JVM 702 */ 703 typedef struct { 704 jstring name; 705 JVM_DTraceProbe* probes; 706 jint probe_count; 707 JVM_DTraceInterfaceAttributes providerAttributes; 708 JVM_DTraceInterfaceAttributes moduleAttributes; 709 JVM_DTraceInterfaceAttributes functionAttributes; 710 JVM_DTraceInterfaceAttributes nameAttributes; 711 JVM_DTraceInterfaceAttributes argsAttributes; 712 void* reserved[4]; // for future use 713 } JVM_DTraceProvider; 714 715 /* 716 * Get the version number the JVM was built with 717 */ 718 JNIEXPORT jint JNICALL 719 JVM_DTraceGetVersion(JNIEnv* env); 720 721 /* 722 * Register new probe with given signature, return global handle 723 * 724 * The version passed in is the version that the library code was 725 * built with. 726 */ 727 JNIEXPORT jlong JNICALL 728 JVM_DTraceActivate(JNIEnv* env, jint version, jstring module_name, 729 jint providers_count, JVM_DTraceProvider* providers); 730 731 /* 732 * Check JSDT probe 733 */ 734 JNIEXPORT jboolean JNICALL 735 JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method); 736 737 /* 738 * Destroy custom DOF 739 */ 740 JNIEXPORT void JNICALL 741 JVM_DTraceDispose(JNIEnv* env, jlong activation_handle); 742 743 /* 744 * Check to see if DTrace is supported by OS 745 */ 746 JNIEXPORT jboolean JNICALL 747 JVM_DTraceIsSupported(JNIEnv* env); 748 749 /************************************************************************* 750 PART 2: Support for the Verifier and Class File Format Checker 751 ************************************************************************/ 752 /* 753 * Return the class name in UTF format. The result is valid 754 * until JVM_ReleaseUTf is called. 755 * 756 * The caller must treat the string as a constant and not modify it 757 * in any way. 758 */ 759 JNIEXPORT const char * JNICALL 760 JVM_GetClassNameUTF(JNIEnv *env, jclass cb); 761 762 /* 763 * Returns the constant pool types in the buffer provided by "types." 764 */ 765 JNIEXPORT void JNICALL 766 JVM_GetClassCPTypes(JNIEnv *env, jclass cb, unsigned char *types); 767 768 /* 769 * Returns the number of Constant Pool entries. 770 */ 771 JNIEXPORT jint JNICALL 772 JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cb); 773 774 /* 775 * Returns the number of *declared* fields or methods. 776 */ 777 JNIEXPORT jint JNICALL 778 JVM_GetClassFieldsCount(JNIEnv *env, jclass cb); 779 780 JNIEXPORT jint JNICALL 781 JVM_GetClassMethodsCount(JNIEnv *env, jclass cb); 782 783 /* 784 * Returns the CP indexes of exceptions raised by a given method. 785 * Places the result in the given buffer. 786 * 787 * The method is identified by method_index. 788 */ 789 JNIEXPORT void JNICALL 790 JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cb, jint method_index, 791 unsigned short *exceptions); 792 /* 793 * Returns the number of exceptions raised by a given method. 794 * The method is identified by method_index. 795 */ 796 JNIEXPORT jint JNICALL 797 JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cb, jint method_index); 798 799 /* 800 * Returns the byte code sequence of a given method. 801 * Places the result in the given buffer. 802 * 803 * The method is identified by method_index. 804 */ 805 JNIEXPORT void JNICALL 806 JVM_GetMethodIxByteCode(JNIEnv *env, jclass cb, jint method_index, 807 unsigned char *code); 808 809 /* 810 * Returns the length of the byte code sequence of a given method. 811 * The method is identified by method_index. 812 */ 813 JNIEXPORT jint JNICALL 814 JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cb, jint method_index); 815 816 /* 817 * A structure used to a capture exception table entry in a Java method. 818 */ 819 typedef struct { 820 jint start_pc; 821 jint end_pc; 822 jint handler_pc; 823 jint catchType; 824 } JVM_ExceptionTableEntryType; 825 826 /* 827 * Returns the exception table entry at entry_index of a given method. 828 * Places the result in the given buffer. 829 * 830 * The method is identified by method_index. 831 */ 832 JNIEXPORT void JNICALL 833 JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cb, jint method_index, 834 jint entry_index, 835 JVM_ExceptionTableEntryType *entry); 836 837 /* 838 * Returns the length of the exception table of a given method. 839 * The method is identified by method_index. 840 */ 841 JNIEXPORT jint JNICALL 842 JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cb, int index); 843 844 /* 845 * Returns the modifiers of a given field. 846 * The field is identified by field_index. 847 */ 848 JNIEXPORT jint JNICALL 849 JVM_GetFieldIxModifiers(JNIEnv *env, jclass cb, int index); 850 851 /* 852 * Returns the modifiers of a given method. 853 * The method is identified by method_index. 854 */ 855 JNIEXPORT jint JNICALL 856 JVM_GetMethodIxModifiers(JNIEnv *env, jclass cb, int index); 857 858 /* 859 * Returns the number of local variables of a given method. 860 * The method is identified by method_index. 861 */ 862 JNIEXPORT jint JNICALL 863 JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cb, int index); 864 865 /* 866 * Returns the number of arguments (including this pointer) of a given method. 867 * The method is identified by method_index. 868 */ 869 JNIEXPORT jint JNICALL 870 JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cb, int index); 871 872 /* 873 * Returns the maximum amount of stack (in words) used by a given method. 874 * The method is identified by method_index. 875 */ 876 JNIEXPORT jint JNICALL 877 JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cb, int index); 878 879 /* 880 * Is a given method a constructor. 881 * The method is identified by method_index. 882 */ 883 JNIEXPORT jboolean JNICALL 884 JVM_IsConstructorIx(JNIEnv *env, jclass cb, int index); 885 886 /* 887 * Is the given method generated by the VM. 888 * The method is identified by method_index. 889 */ 890 JNIEXPORT jboolean JNICALL 891 JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cb, int index); 892 893 /* 894 * Returns the name of a given method in UTF format. 895 * The result remains valid until JVM_ReleaseUTF is called. 896 * 897 * The caller must treat the string as a constant and not modify it 898 * in any way. 899 */ 900 JNIEXPORT const char * JNICALL 901 JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cb, jint index); 902 903 /* 904 * Returns the signature of a given method in UTF format. 905 * The result remains valid until JVM_ReleaseUTF is called. 906 * 907 * The caller must treat the string as a constant and not modify it 908 * in any way. 909 */ 910 JNIEXPORT const char * JNICALL 911 JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cb, jint index); 912 913 /* 914 * Returns the name of the field referred to at a given constant pool 915 * index. 916 * 917 * The result is in UTF format and remains valid until JVM_ReleaseUTF 918 * is called. 919 * 920 * The caller must treat the string as a constant and not modify it 921 * in any way. 922 */ 923 JNIEXPORT const char * JNICALL 924 JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cb, jint index); 925 926 /* 927 * Returns the name of the method referred to at a given constant pool 928 * index. 929 * 930 * The result is in UTF format and remains valid until JVM_ReleaseUTF 931 * 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_GetCPMethodNameUTF(JNIEnv *env, jclass cb, jint index); 938 939 /* 940 * Returns the signature of the method 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_GetCPMethodSignatureUTF(JNIEnv *env, jclass cb, jint index); 951 952 /* 953 * Returns the signature of the field 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_GetCPFieldSignatureUTF(JNIEnv *env, jclass cb, jint index); 964 965 /* 966 * Returns the class name referred to at a given constant pool index. 967 * 968 * The result is in UTF format and remains valid until JVM_ReleaseUTF 969 * is called. 970 * 971 * The caller must treat the string as a constant and not modify it 972 * in any way. 973 */ 974 JNIEXPORT const char * JNICALL 975 JVM_GetCPClassNameUTF(JNIEnv *env, jclass cb, jint index); 976 977 /* 978 * Returns the class name referred to at a given constant pool index. 979 * 980 * The constant pool entry must refer to a CONSTANT_Fieldref. 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_GetCPFieldClassNameUTF(JNIEnv *env, jclass cb, jint index); 990 991 /* 992 * Returns the class name referred to at a given constant pool index. 993 * 994 * The constant pool entry must refer to CONSTANT_Methodref or 995 * CONSTANT_InterfaceMethodref. 996 * 997 * The result is in UTF format and remains valid until JVM_ReleaseUTF 998 * is called. 999 * 1000 * The caller must treat the string as a constant and not modify it 1001 * in any way. 1002 */ 1003 JNIEXPORT const char * JNICALL 1004 JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cb, jint index); 1005 1006 /* 1007 * Returns the modifiers of a field in calledClass. The field is 1008 * referred to in class cb at constant pool entry index. 1009 * 1010 * The caller must treat the string as a constant and not modify it 1011 * in any way. 1012 * 1013 * Returns -1 if the field does not exist in calledClass. 1014 */ 1015 JNIEXPORT jint JNICALL 1016 JVM_GetCPFieldModifiers(JNIEnv *env, jclass cb, int index, jclass calledClass); 1017 1018 /* 1019 * Returns the modifiers of a method in calledClass. The method is 1020 * referred to in class cb at constant pool entry index. 1021 * 1022 * Returns -1 if the method does not exist in calledClass. 1023 */ 1024 JNIEXPORT jint JNICALL 1025 JVM_GetCPMethodModifiers(JNIEnv *env, jclass cb, int index, jclass calledClass); 1026 1027 /* 1028 * Releases the UTF string obtained from the VM. 1029 */ 1030 JNIEXPORT void JNICALL 1031 JVM_ReleaseUTF(const char *utf); 1032 1033 /* 1034 * Compare if two classes are in the same package. 1035 */ 1036 JNIEXPORT jboolean JNICALL 1037 JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2); 1038 1039 /* Get classfile constants */ 1040 #include "classfile_constants.h" 1041 1042 /* 1043 * Support for a VM-independent class format checker. 1044 */ 1045 typedef struct { 1046 unsigned long code; /* byte code */ 1047 unsigned long excs; /* exceptions */ 1048 unsigned long etab; /* catch table */ 1049 unsigned long lnum; /* line number */ 1050 unsigned long lvar; /* local vars */ 1051 } method_size_info; 1052 1053 typedef struct { 1054 unsigned int constants; /* constant pool */ 1055 unsigned int fields; 1056 unsigned int methods; 1057 unsigned int interfaces; 1058 unsigned int fields2; /* number of static 2-word fields */ 1059 unsigned int innerclasses; /* # of records in InnerClasses attr */ 1060 1061 method_size_info clinit; /* memory used in clinit */ 1062 method_size_info main; /* used everywhere else */ 1063 } class_size_info; 1064 1065 #define JVM_RECOGNIZED_CLASS_MODIFIERS (JVM_ACC_PUBLIC | \ 1066 JVM_ACC_FINAL | \ 1067 JVM_ACC_SUPER | \ 1068 JVM_ACC_INTERFACE | \ 1069 JVM_ACC_ABSTRACT | \ 1070 JVM_ACC_ANNOTATION | \ 1071 JVM_ACC_ENUM | \ 1072 JVM_ACC_SYNTHETIC) 1073 1074 #define JVM_RECOGNIZED_FIELD_MODIFIERS (JVM_ACC_PUBLIC | \ 1075 JVM_ACC_PRIVATE | \ 1076 JVM_ACC_PROTECTED | \ 1077 JVM_ACC_STATIC | \ 1078 JVM_ACC_FINAL | \ 1079 JVM_ACC_VOLATILE | \ 1080 JVM_ACC_TRANSIENT | \ 1081 JVM_ACC_ENUM | \ 1082 JVM_ACC_SYNTHETIC) 1083 1084 #define JVM_RECOGNIZED_METHOD_MODIFIERS (JVM_ACC_PUBLIC | \ 1085 JVM_ACC_PRIVATE | \ 1086 JVM_ACC_PROTECTED | \ 1087 JVM_ACC_STATIC | \ 1088 JVM_ACC_FINAL | \ 1089 JVM_ACC_SYNCHRONIZED | \ 1090 JVM_ACC_BRIDGE | \ 1091 JVM_ACC_VARARGS | \ 1092 JVM_ACC_NATIVE | \ 1093 JVM_ACC_ABSTRACT | \ 1094 JVM_ACC_STRICT | \ 1095 JVM_ACC_SYNTHETIC) 1096 1097 /* 1098 * This is the function defined in libjava.so to perform path 1099 * canonicalization. VM call this function before opening jar files 1100 * to load system classes. 1101 * 1102 */ 1103 1104 typedef int (*canonicalize_fn_t)(JNIEnv *env, char *orig, char *out, int len); 1105 1106 /************************************************************************* 1107 PART 3: I/O and Network Support 1108 ************************************************************************/ 1109 1110 /* 1111 * Convert a pathname into native format. This function does syntactic 1112 * cleanup, such as removing redundant separator characters. It modifies 1113 * the given pathname string in place. 1114 */ 1115 JNIEXPORT char * JNICALL 1116 JVM_NativePath(char *); 1117 1118 /* 1119 * The standard printing functions supported by the Java VM. (Should they 1120 * be renamed to JVM_* in the future? 1121 */ 1122 1123 /* jio_snprintf() and jio_vsnprintf() behave like snprintf(3) and vsnprintf(3), 1124 * respectively, with the following differences: 1125 * - The string written to str is always zero-terminated, also in case of 1126 * truncation (count is too small to hold the result string), unless count 1127 * is 0. In case of truncation count-1 characters are written and '\0' 1128 * appendend. 1129 * - If count is too small to hold the whole string, -1 is returned across 1130 * all platforms. */ 1131 1132 JNIEXPORT int 1133 jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args); 1134 1135 JNIEXPORT int 1136 jio_snprintf(char *str, size_t count, const char *fmt, ...); 1137 1138 JNIEXPORT int 1139 jio_fprintf(FILE *, const char *fmt, ...); 1140 1141 JNIEXPORT int 1142 jio_vfprintf(FILE *, const char *fmt, va_list args); 1143 1144 1145 JNIEXPORT void * JNICALL 1146 JVM_RawMonitorCreate(void); 1147 1148 JNIEXPORT void JNICALL 1149 JVM_RawMonitorDestroy(void *mon); 1150 1151 JNIEXPORT jint JNICALL 1152 JVM_RawMonitorEnter(void *mon); 1153 1154 JNIEXPORT void JNICALL 1155 JVM_RawMonitorExit(void *mon); 1156 1157 /* 1158 * java.lang.management support 1159 */ 1160 JNIEXPORT void* JNICALL 1161 JVM_GetManagement(jint version); 1162 1163 /* 1164 * com.sun.tools.attach.VirtualMachine support 1165 * 1166 * Initialize the agent properties with the properties maintained in the VM. 1167 */ 1168 JNIEXPORT jobject JNICALL 1169 JVM_InitAgentProperties(JNIEnv *env, jobject agent_props); 1170 1171 JNIEXPORT jstring JNICALL 1172 JVM_GetTemporaryDirectory(JNIEnv *env); 1173 1174 /* Generics reflection support. 1175 * 1176 * Returns information about the given class's EnclosingMethod 1177 * attribute, if present, or null if the class had no enclosing 1178 * method. 1179 * 1180 * If non-null, the returned array contains three elements. Element 0 1181 * is the java.lang.Class of which the enclosing method is a member, 1182 * and elements 1 and 2 are the java.lang.Strings for the enclosing 1183 * method's name and descriptor, respectively. 1184 */ 1185 JNIEXPORT jobjectArray JNICALL 1186 JVM_GetEnclosingMethodInfo(JNIEnv* env, jclass ofClass); 1187 1188 /* ========================================================================= 1189 * The following defines a private JVM interface that the JDK can query 1190 * for the JVM version and capabilities. sun.misc.Version defines 1191 * the methods for getting the VM version and its capabilities. 1192 * 1193 * When a new bit is added, the following should be updated to provide 1194 * access to the new capability: 1195 * HS: JVM_GetVersionInfo and Abstract_VM_Version class 1196 * SDK: Version class 1197 * 1198 * Similary, a private JDK interface JDK_GetVersionInfo0 is defined for 1199 * JVM to query for the JDK version and capabilities. 1200 * 1201 * When a new bit is added, the following should be updated to provide 1202 * access to the new capability: 1203 * HS: JDK_Version class 1204 * SDK: JDK_GetVersionInfo0 1205 * 1206 * ========================================================================== 1207 */ 1208 typedef struct { 1209 unsigned int jvm_version; /* Encoded $VNUM as specified by JEP-223 */ 1210 unsigned int patch_version : 8; /* JEP-223 patch version */ 1211 unsigned int reserved3 : 8; 1212 unsigned int reserved1 : 16; 1213 unsigned int reserved2; 1214 1215 /* The following bits represents JVM supports that JDK has dependency on. 1216 * JDK can use these bits to determine which JVM version 1217 * and support it has to maintain runtime compatibility. 1218 * 1219 * When a new bit is added in a minor or update release, make sure 1220 * the new bit is also added in the main/baseline. 1221 */ 1222 unsigned int is_attach_supported : 1; 1223 unsigned int : 31; 1224 unsigned int : 32; 1225 unsigned int : 32; 1226 } jvm_version_info; 1227 1228 #define JVM_VERSION_MAJOR(version) ((version & 0xFF000000) >> 24) 1229 #define JVM_VERSION_MINOR(version) ((version & 0x00FF0000) >> 16) 1230 #define JVM_VERSION_SECURITY(version) ((version & 0x0000FF00) >> 8) 1231 #define JVM_VERSION_BUILD(version) ((version & 0x000000FF)) 1232 1233 JNIEXPORT void JNICALL 1234 JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size); 1235 1236 typedef struct { 1237 unsigned int jdk_version; /* Encoded $VNUM as specified by JEP-223 */ 1238 unsigned int patch_version : 8; /* JEP-223 patch version */ 1239 unsigned int reserved3 : 8; 1240 unsigned int reserved1 : 16; 1241 unsigned int reserved2; 1242 unsigned int : 32; 1243 unsigned int : 32; 1244 unsigned int : 32; 1245 } jdk_version_info; 1246 1247 #define JDK_VERSION_MAJOR(version) ((version & 0xFF000000) >> 24) 1248 #define JDK_VERSION_MINOR(version) ((version & 0x00FF0000) >> 16) 1249 #define JDK_VERSION_SECURITY(version) ((version & 0x0000FF00) >> 8) 1250 #define JDK_VERSION_BUILD(version) ((version & 0x000000FF)) 1251 1252 /* 1253 * This is the function JDK_GetVersionInfo0 defined in libjava.so 1254 * that is dynamically looked up by JVM. 1255 */ 1256 typedef void (*jdk_version_info_fn_t)(jdk_version_info* info, size_t info_size); 1257 1258 /* 1259 * This structure is used by the launcher to get the default thread 1260 * stack size from the VM using JNI_GetDefaultJavaVMInitArgs() with a 1261 * version of 1.1. As it is not supported otherwise, it has been removed 1262 * from jni.h 1263 */ 1264 typedef struct JDK1_1InitArgs { 1265 jint version; 1266 1267 char **properties; 1268 jint checkSource; 1269 jint nativeStackSize; 1270 jint javaStackSize; 1271 jint minHeapSize; 1272 jint maxHeapSize; 1273 jint verifyMode; 1274 char *classpath; 1275 1276 jint (JNICALL *vfprintf)(FILE *fp, const char *format, va_list args); 1277 void (JNICALL *exit)(jint code); 1278 void (JNICALL *abort)(void); 1279 1280 jint enableClassGC; 1281 jint enableVerboseGC; 1282 jint disableAsyncGC; 1283 jint verbose; 1284 jboolean debugging; 1285 jint debugPort; 1286 } JDK1_1InitArgs; 1287 1288 1289 #ifdef __cplusplus 1290 } /* extern "C" */ 1291 1292 #endif /* __cplusplus */ 1293 1294 #endif /* !_JAVASOFT_JVM_H_ */