1 /* 2 * Copyright (c) 1997, 2016, 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 5 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 JNIEXPORT jobject JNICALL 115 JVM_InitProperties(JNIEnv *env, jobject p); 116 117 118 /* 119 * java.lang.Runtime 120 */ 121 JNIEXPORT void JNICALL 122 JVM_Halt(jint code); 123 124 JNIEXPORT void JNICALL 125 JVM_GC(void); 126 127 /* Returns the number of real-time milliseconds that have elapsed since the 128 * least-recently-inspected heap object was last inspected by the garbage 129 * collector. 130 * 131 * For simple stop-the-world collectors this value is just the time 132 * since the most recent collection. For generational collectors it is the 133 * time since the oldest generation was most recently collected. Other 134 * collectors are free to return a pessimistic estimate of the elapsed time, or 135 * simply the time since the last full collection was performed. 136 * 137 * Note that in the presence of reference objects, a given object that is no 138 * longer strongly reachable may have to be inspected multiple times before it 139 * can be reclaimed. 140 */ 141 JNIEXPORT jlong JNICALL 142 JVM_MaxObjectInspectionAge(void); 143 144 JNIEXPORT jlong JNICALL 145 JVM_TotalMemory(void); 146 147 JNIEXPORT jlong JNICALL 148 JVM_FreeMemory(void); 149 150 JNIEXPORT jlong JNICALL 151 JVM_MaxMemory(void); 152 153 JNIEXPORT jint JNICALL 154 JVM_ActiveProcessorCount(void); 155 156 JNIEXPORT void * JNICALL 157 JVM_LoadLibrary(const char *name); 158 159 JNIEXPORT void JNICALL 160 JVM_UnloadLibrary(void * handle); 161 162 JNIEXPORT void * JNICALL 163 JVM_FindLibraryEntry(void *handle, const char *name); 164 165 JNIEXPORT jboolean JNICALL 166 JVM_IsSupportedJNIVersion(jint version); 167 168 /* 169 * java.lang.Throwable 170 */ 171 JNIEXPORT void JNICALL 172 JVM_FillInStackTrace(JNIEnv *env, jobject throwable); 173 174 JNIEXPORT void JNICALL 175 JVM_GetStackTraceElements(JNIEnv *env, jobject throwable, jobjectArray elements); 176 177 /* 178 * java.lang.StackWalker 179 */ 180 enum { 181 JVM_STACKWALK_FILL_CLASS_REFS_ONLY = 0x2, 182 JVM_STACKWALK_SHOW_HIDDEN_FRAMES = 0x20, 183 JVM_STACKWALK_FILL_LIVE_STACK_FRAMES = 0x100 184 }; 185 186 JNIEXPORT jobject JNICALL 187 JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jlong mode, 188 jint skip_frames, jint frame_count, jint start_index, 189 jobjectArray frames); 190 191 JNIEXPORT jint JNICALL 192 JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jlong mode, jlong anchor, 193 jint frame_count, jint start_index, 194 jobjectArray frames); 195 196 JNIEXPORT void JNICALL 197 JVM_ToStackTraceElement(JNIEnv* env, jobject frame, jobject stackElement); 198 199 JNIEXPORT jobjectArray JNICALL 200 JVM_GetVmArguments(JNIEnv *env); 201 202 /* 203 * java.lang.Thread 204 */ 205 JNIEXPORT void JNICALL 206 JVM_StartThread(JNIEnv *env, jobject thread); 207 208 JNIEXPORT void JNICALL 209 JVM_StopThread(JNIEnv *env, jobject thread, jobject exception); 210 211 JNIEXPORT jboolean JNICALL 212 JVM_IsThreadAlive(JNIEnv *env, jobject thread); 213 214 JNIEXPORT void JNICALL 215 JVM_SuspendThread(JNIEnv *env, jobject thread); 216 217 JNIEXPORT void JNICALL 218 JVM_ResumeThread(JNIEnv *env, jobject thread); 219 220 JNIEXPORT void JNICALL 221 JVM_SetThreadPriority(JNIEnv *env, jobject thread, jint prio); 222 223 JNIEXPORT void JNICALL 224 JVM_Yield(JNIEnv *env, jclass threadClass); 225 226 JNIEXPORT void JNICALL 227 JVM_Sleep(JNIEnv *env, jclass threadClass, jlong millis); 228 229 JNIEXPORT jobject JNICALL 230 JVM_CurrentThread(JNIEnv *env, jclass threadClass); 231 232 JNIEXPORT jint JNICALL 233 JVM_CountStackFrames(JNIEnv *env, jobject thread); 234 235 JNIEXPORT void JNICALL 236 JVM_Interrupt(JNIEnv *env, jobject thread); 237 238 JNIEXPORT jboolean JNICALL 239 JVM_IsInterrupted(JNIEnv *env, jobject thread, jboolean clearInterrupted); 240 241 JNIEXPORT jboolean JNICALL 242 JVM_HoldsLock(JNIEnv *env, jclass threadClass, jobject obj); 243 244 JNIEXPORT void JNICALL 245 JVM_DumpAllStacks(JNIEnv *env, jclass unused); 246 247 JNIEXPORT jobjectArray JNICALL 248 JVM_GetAllThreads(JNIEnv *env, jclass dummy); 249 250 JNIEXPORT void JNICALL 251 JVM_SetNativeThreadName(JNIEnv *env, jobject jthread, jstring name); 252 253 /* getStackTrace() and getAllStackTraces() method */ 254 JNIEXPORT jobjectArray JNICALL 255 JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads); 256 257 /* 258 * java.lang.SecurityManager 259 */ 260 JNIEXPORT jclass JNICALL 261 JVM_CurrentLoadedClass(JNIEnv *env); 262 263 JNIEXPORT jobject JNICALL 264 JVM_CurrentClassLoader(JNIEnv *env); 265 266 JNIEXPORT jobjectArray JNICALL 267 JVM_GetClassContext(JNIEnv *env); 268 269 JNIEXPORT jint JNICALL 270 JVM_ClassDepth(JNIEnv *env, jstring name); 271 272 JNIEXPORT jint JNICALL 273 JVM_ClassLoaderDepth(JNIEnv *env); 274 275 /* 276 * java.lang.Package 277 */ 278 JNIEXPORT jstring JNICALL 279 JVM_GetSystemPackage(JNIEnv *env, jstring name); 280 281 JNIEXPORT jobjectArray JNICALL 282 JVM_GetSystemPackages(JNIEnv *env); 283 284 /* 285 * java.io.ObjectInputStream 286 */ 287 JNIEXPORT jobject JNICALL 288 JVM_LatestUserDefinedLoader(JNIEnv *env); 289 290 /* 291 * java.lang.reflect.Array 292 */ 293 JNIEXPORT jint JNICALL 294 JVM_GetArrayLength(JNIEnv *env, jobject arr); 295 296 JNIEXPORT jobject JNICALL 297 JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index); 298 299 JNIEXPORT jvalue JNICALL 300 JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode); 301 302 JNIEXPORT void JNICALL 303 JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val); 304 305 JNIEXPORT void JNICALL 306 JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, 307 unsigned char vCode); 308 309 JNIEXPORT jobject JNICALL 310 JVM_NewArray(JNIEnv *env, jclass eltClass, jint length); 311 312 JNIEXPORT jobject JNICALL 313 JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim); 314 315 /* 316 * java.lang.Class and java.lang.ClassLoader 317 */ 318 319 #define JVM_CALLER_DEPTH -1 320 321 /* 322 * Returns the immediate caller class of the native method invoking 323 * JVM_GetCallerClass. The Method.invoke and other frames due to 324 * reflection machinery are skipped. 325 * 326 * The depth parameter must be -1 (JVM_DEPTH). The caller is expected 327 * to be marked with sun.reflect.CallerSensitive. The JVM will throw 328 * an error if it is not marked propertly. 329 */ 330 JNIEXPORT jclass JNICALL 331 JVM_GetCallerClass(JNIEnv *env, int depth); 332 333 334 /* 335 * Find primitive classes 336 * utf: class name 337 */ 338 JNIEXPORT jclass JNICALL 339 JVM_FindPrimitiveClass(JNIEnv *env, const char *utf); 340 341 342 /* 343 * Find a class from a boot class loader. Returns NULL if class not found. 344 */ 345 JNIEXPORT jclass JNICALL 346 JVM_FindClassFromBootLoader(JNIEnv *env, const char *name); 347 348 /* 349 * Find a class from a given class loader. Throws ClassNotFoundException. 350 * name: name of class 351 * init: whether initialization is done 352 * loader: class loader to look up the class. This may not be the same as the caller's 353 * class loader. 354 * caller: initiating class. The initiating class may be null when a security 355 * manager is not installed. 356 */ 357 JNIEXPORT jclass JNICALL 358 JVM_FindClassFromCaller(JNIEnv *env, const char *name, jboolean init, 359 jobject loader, jclass caller); 360 361 /* 362 * Find a class from a given class. 363 */ 364 JNIEXPORT jclass JNICALL 365 JVM_FindClassFromClass(JNIEnv *env, const char *name, jboolean init, 366 jclass from); 367 368 /* Find a loaded class cached by the VM */ 369 JNIEXPORT jclass JNICALL 370 JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name); 371 372 /* Define a class */ 373 JNIEXPORT jclass JNICALL 374 JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, 375 jsize len, jobject pd); 376 377 /* Define a class with a source (added in JDK1.5) */ 378 JNIEXPORT jclass JNICALL 379 JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, 380 const jbyte *buf, jsize len, jobject pd, 381 const char *source); 382 383 /* 384 * Module support funcions 385 */ 386 387 JNIEXPORT void JNICALL 388 JVM_DefineModule(JNIEnv *env, jobject module, jstring version, jstring location, 389 jobjectArray packages); 390 391 JNIEXPORT void JNICALL 392 JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module); 393 394 JNIEXPORT void JNICALL 395 JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject to_module); 396 397 JNIEXPORT jboolean JNICALL 398 JVM_CanReadModule(JNIEnv *env, jobject asking_module, jobject source_module); 399 400 JNIEXPORT void JNICALL 401 JVM_AddModuleExports(JNIEnv *env, jobject from_module, jstring package, jobject to_module); 402 403 JNIEXPORT void JNICALL 404 JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, jstring package); 405 406 JNIEXPORT void JNICALL 407 JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, jstring package); 408 409 JNIEXPORT jboolean JNICALL 410 JVM_IsExportedToModule(JNIEnv *env, jobject from_module, jstring package, jobject to_module); 411 412 JNIEXPORT void JNICALL 413 JVM_AddModulePackage(JNIEnv* env, jobject module, jstring package); 414 415 JNIEXPORT jobject JNICALL 416 JVM_GetModuleByPackageName(JNIEnv *env, jobject cl, jstring pkg); 417 418 /* 419 * Reflection support functions 420 */ 421 422 JNIEXPORT jstring JNICALL 423 JVM_GetClassName(JNIEnv *env, jclass cls); 424 425 JNIEXPORT jobjectArray JNICALL 426 JVM_GetClassInterfaces(JNIEnv *env, jclass cls); 427 428 JNIEXPORT jboolean JNICALL 429 JVM_IsInterface(JNIEnv *env, jclass cls); 430 431 JNIEXPORT jobjectArray JNICALL 432 JVM_GetClassSigners(JNIEnv *env, jclass cls); 433 434 JNIEXPORT void JNICALL 435 JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers); 436 437 JNIEXPORT jobject JNICALL 438 JVM_GetProtectionDomain(JNIEnv *env, jclass cls); 439 440 JNIEXPORT jboolean JNICALL 441 JVM_IsArrayClass(JNIEnv *env, jclass cls); 442 443 JNIEXPORT jboolean JNICALL 444 JVM_IsPrimitiveClass(JNIEnv *env, jclass cls); 445 446 JNIEXPORT jint JNICALL 447 JVM_GetClassModifiers(JNIEnv *env, jclass cls); 448 449 JNIEXPORT jobjectArray JNICALL 450 JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass); 451 452 JNIEXPORT jclass JNICALL 453 JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass); 454 455 JNIEXPORT jstring JNICALL 456 JVM_GetSimpleBinaryName(JNIEnv *env, jclass ofClass); 457 458 /* Generics support (JDK 1.5) */ 459 JNIEXPORT jstring JNICALL 460 JVM_GetClassSignature(JNIEnv *env, jclass cls); 461 462 /* Annotations support (JDK 1.5) */ 463 JNIEXPORT jbyteArray JNICALL 464 JVM_GetClassAnnotations(JNIEnv *env, jclass cls); 465 466 /* Type use annotations support (JDK 1.8) */ 467 468 JNIEXPORT jbyteArray JNICALL 469 JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls); 470 471 JNIEXPORT jbyteArray JNICALL 472 JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field); 473 474 JNIEXPORT jbyteArray JNICALL 475 JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method); 476 477 /* 478 * New (JDK 1.4) reflection implementation 479 */ 480 481 JNIEXPORT jobjectArray JNICALL 482 JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly); 483 484 JNIEXPORT jobjectArray JNICALL 485 JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly); 486 487 JNIEXPORT jobjectArray JNICALL 488 JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly); 489 490 /* Differs from JVM_GetClassModifiers in treatment of inner classes. 491 This returns the access flags for the class as specified in the 492 class file rather than searching the InnerClasses attribute (if 493 present) to find the source-level access flags. Only the values of 494 the low 13 bits (i.e., a mask of 0x1FFF) are guaranteed to be 495 valid. */ 496 JNIEXPORT jint JNICALL 497 JVM_GetClassAccessFlags(JNIEnv *env, jclass cls); 498 499 /* The following two reflection routines are still needed due to startup time issues */ 500 /* 501 * java.lang.reflect.Method 502 */ 503 JNIEXPORT jobject JNICALL 504 JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0); 505 506 /* 507 * java.lang.reflect.Constructor 508 */ 509 JNIEXPORT jobject JNICALL 510 JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0); 511 512 /* 513 * Constant pool access; currently used to implement reflective access to annotations (JDK 1.5) 514 */ 515 516 JNIEXPORT jobject JNICALL 517 JVM_GetClassConstantPool(JNIEnv *env, jclass cls); 518 519 JNIEXPORT jint JNICALL JVM_ConstantPoolGetSize 520 (JNIEnv *env, jobject unused, jobject jcpool); 521 522 JNIEXPORT jclass JNICALL JVM_ConstantPoolGetClassAt 523 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 524 525 JNIEXPORT jclass JNICALL JVM_ConstantPoolGetClassAtIfLoaded 526 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 527 528 JNIEXPORT jint JNICALL JVM_ConstantPoolGetClassRefIndexAt 529 (JNIEnv *env, jobject obj, jobject unused, jint index); 530 531 JNIEXPORT jobject JNICALL JVM_ConstantPoolGetMethodAt 532 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 533 534 JNIEXPORT jobject JNICALL JVM_ConstantPoolGetMethodAtIfLoaded 535 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 536 537 JNIEXPORT jobject JNICALL JVM_ConstantPoolGetFieldAt 538 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 539 540 JNIEXPORT jobject JNICALL JVM_ConstantPoolGetFieldAtIfLoaded 541 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 542 543 JNIEXPORT jobjectArray JNICALL JVM_ConstantPoolGetMemberRefInfoAt 544 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 545 546 JNIEXPORT jint JNICALL JVM_ConstantPoolGetNameAndTypeRefIndexAt 547 (JNIEnv *env, jobject obj, jobject unused, jint index); 548 549 JNIEXPORT jobjectArray JNICALL JVM_ConstantPoolGetNameAndTypeRefInfoAt 550 (JNIEnv *env, jobject obj, jobject unused, jint index); 551 552 JNIEXPORT jint JNICALL JVM_ConstantPoolGetIntAt 553 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 554 555 JNIEXPORT jlong JNICALL JVM_ConstantPoolGetLongAt 556 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 557 558 JNIEXPORT jfloat JNICALL JVM_ConstantPoolGetFloatAt 559 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 560 561 JNIEXPORT jdouble JNICALL JVM_ConstantPoolGetDoubleAt 562 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 563 564 JNIEXPORT jstring JNICALL JVM_ConstantPoolGetStringAt 565 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 566 567 JNIEXPORT jstring JNICALL JVM_ConstantPoolGetUTF8At 568 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 569 570 JNIEXPORT jbyte JNICALL JVM_ConstantPoolGetTagAt 571 (JNIEnv *env, jobject unused, jobject jcpool, jint index); 572 573 /* 574 * Parameter reflection 575 */ 576 577 JNIEXPORT jobjectArray JNICALL 578 JVM_GetMethodParameters(JNIEnv *env, jobject method); 579 580 /* 581 * java.security.* 582 */ 583 584 JNIEXPORT jobject JNICALL 585 JVM_DoPrivileged(JNIEnv *env, jclass cls, 586 jobject action, jobject context, jboolean wrapException); 587 588 JNIEXPORT jobject JNICALL 589 JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls); 590 591 JNIEXPORT jobject JNICALL 592 JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls); 593 594 /* 595 * Signal support, used to implement the shutdown sequence. Every VM must 596 * support JVM_SIGINT and JVM_SIGTERM, raising the former for user interrupts 597 * (^C) and the latter for external termination (kill, system shutdown, etc.). 598 * Other platform-dependent signal values may also be supported. 599 */ 600 601 JNIEXPORT void * JNICALL 602 JVM_RegisterSignal(jint sig, void *handler); 603 604 JNIEXPORT jboolean JNICALL 605 JVM_RaiseSignal(jint sig); 606 607 JNIEXPORT jint JNICALL 608 JVM_FindSignal(const char *name); 609 610 /* 611 * Retrieve the assertion directives for the specified class. 612 */ 613 JNIEXPORT jboolean JNICALL 614 JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls); 615 616 /* 617 * Retrieve the assertion directives from the VM. 618 */ 619 JNIEXPORT jobject JNICALL 620 JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused); 621 622 /* 623 * java.util.concurrent.atomic.AtomicLong 624 */ 625 JNIEXPORT jboolean JNICALL 626 JVM_SupportsCX8(void); 627 628 /* 629 * com.sun.dtrace.jsdt support 630 */ 631 632 #define JVM_TRACING_DTRACE_VERSION 1 633 634 /* 635 * Structure to pass one probe description to JVM 636 */ 637 typedef struct { 638 jmethodID method; 639 jstring function; 640 jstring name; 641 void* reserved[4]; // for future use 642 } JVM_DTraceProbe; 643 644 /** 645 * Encapsulates the stability ratings for a DTrace provider field 646 */ 647 typedef struct { 648 jint nameStability; 649 jint dataStability; 650 jint dependencyClass; 651 } JVM_DTraceInterfaceAttributes; 652 653 /* 654 * Structure to pass one provider description to JVM 655 */ 656 typedef struct { 657 jstring name; 658 JVM_DTraceProbe* probes; 659 jint probe_count; 660 JVM_DTraceInterfaceAttributes providerAttributes; 661 JVM_DTraceInterfaceAttributes moduleAttributes; 662 JVM_DTraceInterfaceAttributes functionAttributes; 663 JVM_DTraceInterfaceAttributes nameAttributes; 664 JVM_DTraceInterfaceAttributes argsAttributes; 665 void* reserved[4]; // for future use 666 } JVM_DTraceProvider; 667 668 /* 669 * Get the version number the JVM was built with 670 */ 671 JNIEXPORT jint JNICALL 672 JVM_DTraceGetVersion(JNIEnv* env); 673 674 /* 675 * Register new probe with given signature, return global handle 676 * 677 * The version passed in is the version that the library code was 678 * built with. 679 */ 680 JNIEXPORT jlong JNICALL 681 JVM_DTraceActivate(JNIEnv* env, jint version, jstring module_name, 682 jint providers_count, JVM_DTraceProvider* providers); 683 684 /* 685 * Check JSDT probe 686 */ 687 JNIEXPORT jboolean JNICALL 688 JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method); 689 690 /* 691 * Destroy custom DOF 692 */ 693 JNIEXPORT void JNICALL 694 JVM_DTraceDispose(JNIEnv* env, jlong activation_handle); 695 696 /* 697 * Check to see if DTrace is supported by OS 698 */ 699 JNIEXPORT jboolean JNICALL 700 JVM_DTraceIsSupported(JNIEnv* env); 701 702 /************************************************************************* 703 PART 2: Support for the Verifier and Class File Format Checker 704 ************************************************************************/ 705 /* 706 * Return the class name in UTF format. The result is valid 707 * until JVM_ReleaseUTf is called. 708 * 709 * The caller must treat the string as a constant and not modify it 710 * in any way. 711 */ 712 JNIEXPORT const char * JNICALL 713 JVM_GetClassNameUTF(JNIEnv *env, jclass cb); 714 715 /* 716 * Returns the constant pool types in the buffer provided by "types." 717 */ 718 JNIEXPORT void JNICALL 719 JVM_GetClassCPTypes(JNIEnv *env, jclass cb, unsigned char *types); 720 721 /* 722 * Returns the number of Constant Pool entries. 723 */ 724 JNIEXPORT jint JNICALL 725 JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cb); 726 727 /* 728 * Returns the number of *declared* fields or methods. 729 */ 730 JNIEXPORT jint JNICALL 731 JVM_GetClassFieldsCount(JNIEnv *env, jclass cb); 732 733 JNIEXPORT jint JNICALL 734 JVM_GetClassMethodsCount(JNIEnv *env, jclass cb); 735 736 /* 737 * Returns the CP indexes of exceptions raised by a given method. 738 * Places the result in the given buffer. 739 * 740 * The method is identified by method_index. 741 */ 742 JNIEXPORT void JNICALL 743 JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cb, jint method_index, 744 unsigned short *exceptions); 745 /* 746 * Returns the number of exceptions raised by a given method. 747 * The method is identified by method_index. 748 */ 749 JNIEXPORT jint JNICALL 750 JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cb, jint method_index); 751 752 /* 753 * Returns the byte code sequence of a given method. 754 * Places the result in the given buffer. 755 * 756 * The method is identified by method_index. 757 */ 758 JNIEXPORT void JNICALL 759 JVM_GetMethodIxByteCode(JNIEnv *env, jclass cb, jint method_index, 760 unsigned char *code); 761 762 /* 763 * Returns the length of the byte code sequence of a given method. 764 * The method is identified by method_index. 765 */ 766 JNIEXPORT jint JNICALL 767 JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cb, jint method_index); 768 769 /* 770 * A structure used to a capture exception table entry in a Java method. 771 */ 772 typedef struct { 773 jint start_pc; 774 jint end_pc; 775 jint handler_pc; 776 jint catchType; 777 } JVM_ExceptionTableEntryType; 778 779 /* 780 * Returns the exception table entry at entry_index of a given method. 781 * Places the result in the given buffer. 782 * 783 * The method is identified by method_index. 784 */ 785 JNIEXPORT void JNICALL 786 JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cb, jint method_index, 787 jint entry_index, 788 JVM_ExceptionTableEntryType *entry); 789 790 /* 791 * Returns the length of the exception table of a given method. 792 * The method is identified by method_index. 793 */ 794 JNIEXPORT jint JNICALL 795 JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cb, int index); 796 797 /* 798 * Returns the modifiers of a given field. 799 * The field is identified by field_index. 800 */ 801 JNIEXPORT jint JNICALL 802 JVM_GetFieldIxModifiers(JNIEnv *env, jclass cb, int index); 803 804 /* 805 * Returns the modifiers of a given method. 806 * The method is identified by method_index. 807 */ 808 JNIEXPORT jint JNICALL 809 JVM_GetMethodIxModifiers(JNIEnv *env, jclass cb, int index); 810 811 /* 812 * Returns the number of local variables of a given method. 813 * The method is identified by method_index. 814 */ 815 JNIEXPORT jint JNICALL 816 JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cb, int index); 817 818 /* 819 * Returns the number of arguments (including this pointer) of a given method. 820 * The method is identified by method_index. 821 */ 822 JNIEXPORT jint JNICALL 823 JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cb, int index); 824 825 /* 826 * Returns the maximum amount of stack (in words) used by a given method. 827 * The method is identified by method_index. 828 */ 829 JNIEXPORT jint JNICALL 830 JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cb, int index); 831 832 /* 833 * Is a given method a constructor. 834 * The method is identified by method_index. 835 */ 836 JNIEXPORT jboolean JNICALL 837 JVM_IsConstructorIx(JNIEnv *env, jclass cb, int index); 838 839 /* 840 * Is the given method generated by the VM. 841 * The method is identified by method_index. 842 */ 843 JNIEXPORT jboolean JNICALL 844 JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cb, int index); 845 846 /* 847 * Returns the name of a given method in UTF format. 848 * The result remains valid until JVM_ReleaseUTF is called. 849 * 850 * The caller must treat the string as a constant and not modify it 851 * in any way. 852 */ 853 JNIEXPORT const char * JNICALL 854 JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cb, jint index); 855 856 /* 857 * Returns the signature of a given method in UTF format. 858 * The result remains valid until JVM_ReleaseUTF is called. 859 * 860 * The caller must treat the string as a constant and not modify it 861 * in any way. 862 */ 863 JNIEXPORT const char * JNICALL 864 JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cb, jint index); 865 866 /* 867 * Returns the name of the field referred to at a given constant pool 868 * index. 869 * 870 * The result is in UTF format and remains valid until JVM_ReleaseUTF 871 * is called. 872 * 873 * The caller must treat the string as a constant and not modify it 874 * in any way. 875 */ 876 JNIEXPORT const char * JNICALL 877 JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cb, jint index); 878 879 /* 880 * Returns the name of the method referred to at a given constant pool 881 * index. 882 * 883 * The result is in UTF format and remains valid until JVM_ReleaseUTF 884 * is called. 885 * 886 * The caller must treat the string as a constant and not modify it 887 * in any way. 888 */ 889 JNIEXPORT const char * JNICALL 890 JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cb, jint index); 891 892 /* 893 * Returns the signature of the method referred to at a given constant pool 894 * index. 895 * 896 * The result is in UTF format and remains valid until JVM_ReleaseUTF 897 * is called. 898 * 899 * The caller must treat the string as a constant and not modify it 900 * in any way. 901 */ 902 JNIEXPORT const char * JNICALL 903 JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cb, jint index); 904 905 /* 906 * Returns the signature of the field referred to at a given constant pool 907 * index. 908 * 909 * The result is in UTF format and remains valid until JVM_ReleaseUTF 910 * is called. 911 * 912 * The caller must treat the string as a constant and not modify it 913 * in any way. 914 */ 915 JNIEXPORT const char * JNICALL 916 JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cb, jint index); 917 918 /* 919 * Returns the class name referred to at a given constant pool index. 920 * 921 * The result is in UTF format and remains valid until JVM_ReleaseUTF 922 * is called. 923 * 924 * The caller must treat the string as a constant and not modify it 925 * in any way. 926 */ 927 JNIEXPORT const char * JNICALL 928 JVM_GetCPClassNameUTF(JNIEnv *env, jclass cb, jint index); 929 930 /* 931 * Returns the class name referred to at a given constant pool index. 932 * 933 * The constant pool entry must refer to a CONSTANT_Fieldref. 934 * 935 * The result is in UTF format and remains valid until JVM_ReleaseUTF 936 * is called. 937 * 938 * The caller must treat the string as a constant and not modify it 939 * in any way. 940 */ 941 JNIEXPORT const char * JNICALL 942 JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cb, jint index); 943 944 /* 945 * Returns the class name referred to at a given constant pool index. 946 * 947 * The constant pool entry must refer to CONSTANT_Methodref or 948 * CONSTANT_InterfaceMethodref. 949 * 950 * The result is in UTF format and remains valid until JVM_ReleaseUTF 951 * is called. 952 * 953 * The caller must treat the string as a constant and not modify it 954 * in any way. 955 */ 956 JNIEXPORT const char * JNICALL 957 JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cb, jint index); 958 959 /* 960 * Returns the modifiers of a field in calledClass. The field is 961 * referred to in class cb at constant pool entry index. 962 * 963 * The caller must treat the string as a constant and not modify it 964 * in any way. 965 * 966 * Returns -1 if the field does not exist in calledClass. 967 */ 968 JNIEXPORT jint JNICALL 969 JVM_GetCPFieldModifiers(JNIEnv *env, jclass cb, int index, jclass calledClass); 970 971 /* 972 * Returns the modifiers of a method in calledClass. The method is 973 * referred to in class cb at constant pool entry index. 974 * 975 * Returns -1 if the method does not exist in calledClass. 976 */ 977 JNIEXPORT jint JNICALL 978 JVM_GetCPMethodModifiers(JNIEnv *env, jclass cb, int index, jclass calledClass); 979 980 /* 981 * Releases the UTF string obtained from the VM. 982 */ 983 JNIEXPORT void JNICALL 984 JVM_ReleaseUTF(const char *utf); 985 986 /* 987 * Compare if two classes are in the same package. 988 */ 989 JNIEXPORT jboolean JNICALL 990 JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2); 991 992 /* Get classfile constants */ 993 #include "classfile_constants.h" 994 995 /* 996 * A function defined by the byte-code verifier and called by the VM. 997 * This is not a function implemented in the VM. 998 * 999 * Returns JNI_FALSE if verification fails. A detailed error message 1000 * will be places in msg_buf, whose length is specified by buf_len. 1001 */ 1002 typedef jboolean (*verifier_fn_t)(JNIEnv *env, 1003 jclass cb, 1004 char * msg_buf, 1005 jint buf_len); 1006 1007 1008 /* 1009 * Support for a VM-independent class format checker. 1010 */ 1011 typedef struct { 1012 unsigned long code; /* byte code */ 1013 unsigned long excs; /* exceptions */ 1014 unsigned long etab; /* catch table */ 1015 unsigned long lnum; /* line number */ 1016 unsigned long lvar; /* local vars */ 1017 } method_size_info; 1018 1019 typedef struct { 1020 unsigned int constants; /* constant pool */ 1021 unsigned int fields; 1022 unsigned int methods; 1023 unsigned int interfaces; 1024 unsigned int fields2; /* number of static 2-word fields */ 1025 unsigned int innerclasses; /* # of records in InnerClasses attr */ 1026 1027 method_size_info clinit; /* memory used in clinit */ 1028 method_size_info main; /* used everywhere else */ 1029 } class_size_info; 1030 1031 /* 1032 * Functions defined in libjava.so to perform string conversions. 1033 * 1034 */ 1035 1036 typedef jstring (*to_java_string_fn_t)(JNIEnv *env, char *str); 1037 1038 typedef char *(*to_c_string_fn_t)(JNIEnv *env, jstring s, jboolean *b); 1039 1040 /* This is the function defined in libjava.so that performs class 1041 * format checks. This functions fills in size information about 1042 * the class file and returns: 1043 * 1044 * 0: good 1045 * -1: out of memory 1046 * -2: bad format 1047 * -3: unsupported version 1048 * -4: bad class name 1049 */ 1050 1051 typedef jint (*check_format_fn_t)(char *class_name, 1052 unsigned char *data, 1053 unsigned int data_size, 1054 class_size_info *class_size, 1055 char *message_buffer, 1056 jint buffer_length, 1057 jboolean measure_only, 1058 jboolean check_relaxed); 1059 1060 #define JVM_RECOGNIZED_CLASS_MODIFIERS (JVM_ACC_PUBLIC | \ 1061 JVM_ACC_FINAL | \ 1062 JVM_ACC_SUPER | \ 1063 JVM_ACC_INTERFACE | \ 1064 JVM_ACC_ABSTRACT | \ 1065 JVM_ACC_ANNOTATION | \ 1066 JVM_ACC_ENUM | \ 1067 JVM_ACC_SYNTHETIC) 1068 1069 #define JVM_RECOGNIZED_FIELD_MODIFIERS (JVM_ACC_PUBLIC | \ 1070 JVM_ACC_PRIVATE | \ 1071 JVM_ACC_PROTECTED | \ 1072 JVM_ACC_STATIC | \ 1073 JVM_ACC_FINAL | \ 1074 JVM_ACC_VOLATILE | \ 1075 JVM_ACC_TRANSIENT | \ 1076 JVM_ACC_ENUM | \ 1077 JVM_ACC_SYNTHETIC) 1078 1079 #define JVM_RECOGNIZED_METHOD_MODIFIERS (JVM_ACC_PUBLIC | \ 1080 JVM_ACC_PRIVATE | \ 1081 JVM_ACC_PROTECTED | \ 1082 JVM_ACC_STATIC | \ 1083 JVM_ACC_FINAL | \ 1084 JVM_ACC_SYNCHRONIZED | \ 1085 JVM_ACC_BRIDGE | \ 1086 JVM_ACC_VARARGS | \ 1087 JVM_ACC_NATIVE | \ 1088 JVM_ACC_ABSTRACT | \ 1089 JVM_ACC_STRICT | \ 1090 JVM_ACC_SYNTHETIC) 1091 1092 /* 1093 * This is the function defined in libjava.so to perform path 1094 * canonicalization. VM call this function before opening jar files 1095 * to load system classes. 1096 * 1097 */ 1098 1099 typedef int (*canonicalize_fn_t)(JNIEnv *env, char *orig, char *out, int len); 1100 1101 /************************************************************************* 1102 PART 3: I/O and Network Support 1103 ************************************************************************/ 1104 1105 /* 1106 * Convert a pathname into native format. This function does syntactic 1107 * cleanup, such as removing redundant separator characters. It modifies 1108 * the given pathname string in place. 1109 */ 1110 JNIEXPORT char * JNICALL 1111 JVM_NativePath(char *); 1112 1113 /* 1114 * The standard printing functions supported by the Java VM. (Should they 1115 * be renamed to JVM_* in the future? 1116 */ 1117 1118 /* 1119 * BE CAREFUL! The following functions do not implement the 1120 * full feature set of standard C printf formats. 1121 */ 1122 int 1123 jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args); 1124 1125 int 1126 jio_snprintf(char *str, size_t count, const char *fmt, ...); 1127 1128 int 1129 jio_fprintf(FILE *, const char *fmt, ...); 1130 1131 int 1132 jio_vfprintf(FILE *, const char *fmt, va_list args); 1133 1134 1135 JNIEXPORT void * JNICALL 1136 JVM_RawMonitorCreate(void); 1137 1138 JNIEXPORT void JNICALL 1139 JVM_RawMonitorDestroy(void *mon); 1140 1141 JNIEXPORT jint JNICALL 1142 JVM_RawMonitorEnter(void *mon); 1143 1144 JNIEXPORT void JNICALL 1145 JVM_RawMonitorExit(void *mon); 1146 1147 /* 1148 * java.lang.management support 1149 */ 1150 JNIEXPORT void* JNICALL 1151 JVM_GetManagement(jint version); 1152 1153 /* 1154 * com.sun.tools.attach.VirtualMachine support 1155 * 1156 * Initialize the agent properties with the properties maintained in the VM. 1157 */ 1158 JNIEXPORT jobject JNICALL 1159 JVM_InitAgentProperties(JNIEnv *env, jobject agent_props); 1160 1161 JNIEXPORT jstring JNICALL 1162 JVM_GetTemporaryDirectory(JNIEnv *env); 1163 1164 /* Generics reflection support. 1165 * 1166 * Returns information about the given class's EnclosingMethod 1167 * attribute, if present, or null if the class had no enclosing 1168 * method. 1169 * 1170 * If non-null, the returned array contains three elements. Element 0 1171 * is the java.lang.Class of which the enclosing method is a member, 1172 * and elements 1 and 2 are the java.lang.Strings for the enclosing 1173 * method's name and descriptor, respectively. 1174 */ 1175 JNIEXPORT jobjectArray JNICALL 1176 JVM_GetEnclosingMethodInfo(JNIEnv* env, jclass ofClass); 1177 1178 /* ========================================================================= 1179 * The following defines a private JVM interface that the JDK can query 1180 * for the JVM version and capabilities. sun.misc.Version defines 1181 * the methods for getting the VM version and its capabilities. 1182 * 1183 * When a new bit is added, the following should be updated to provide 1184 * access to the new capability: 1185 * HS: JVM_GetVersionInfo and Abstract_VM_Version class 1186 * SDK: Version class 1187 * 1188 * Similary, a private JDK interface JDK_GetVersionInfo0 is defined for 1189 * JVM to query for the JDK version and capabilities. 1190 * 1191 * When a new bit is added, the following should be updated to provide 1192 * access to the new capability: 1193 * HS: JDK_Version class 1194 * SDK: JDK_GetVersionInfo0 1195 * 1196 * ========================================================================== 1197 */ 1198 typedef struct { 1199 unsigned int jvm_version; /* Encoded $VNUM as specified by JEP-223 */ 1200 unsigned int patch_version : 8; /* JEP-223 patch version */ 1201 unsigned int reserved3 : 8; 1202 unsigned int reserved1 : 16; 1203 unsigned int reserved2; 1204 1205 /* The following bits represents JVM supports that JDK has dependency on. 1206 * JDK can use these bits to determine which JVM version 1207 * and support it has to maintain runtime compatibility. 1208 * 1209 * When a new bit is added in a minor or update release, make sure 1210 * the new bit is also added in the main/baseline. 1211 */ 1212 unsigned int is_attach_supported : 1; 1213 unsigned int : 31; 1214 unsigned int : 32; 1215 unsigned int : 32; 1216 } jvm_version_info; 1217 1218 #define JVM_VERSION_MAJOR(version) ((version & 0xFF000000) >> 24) 1219 #define JVM_VERSION_MINOR(version) ((version & 0x00FF0000) >> 16) 1220 #define JVM_VERSION_SECURITY(version) ((version & 0x0000FF00) >> 8) 1221 #define JVM_VERSION_BUILD(version) ((version & 0x000000FF)) 1222 1223 JNIEXPORT void JNICALL 1224 JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size); 1225 1226 typedef struct { 1227 unsigned int jdk_version; /* Encoded $VNUM as specified by JEP-223 */ 1228 unsigned int patch_version : 8; /* JEP-223 patch version */ 1229 unsigned int reserved3 : 8; 1230 unsigned int reserved1 : 16; 1231 unsigned int reserved2; 1232 1233 /* The following bits represents new JDK supports that VM has dependency on. 1234 * VM implementation can use these bits to determine which JDK version 1235 * and support it has to maintain runtime compatibility. 1236 * 1237 * When a new bit is added in a minor or update release, make sure 1238 * the new bit is also added in the main/baseline. 1239 */ 1240 unsigned int thread_park_blocker : 1; 1241 unsigned int post_vm_init_hook_enabled : 1; 1242 unsigned int pending_list_uses_discovered_field : 1; 1243 unsigned int : 29; 1244 unsigned int : 32; 1245 unsigned int : 32; 1246 } jdk_version_info; 1247 1248 #define JDK_VERSION_MAJOR(version) ((version & 0xFF000000) >> 24) 1249 #define JDK_VERSION_MINOR(version) ((version & 0x00FF0000) >> 16) 1250 #define JDK_VERSION_SECURITY(version) ((version & 0x0000FF00) >> 8) 1251 #define JDK_VERSION_BUILD(version) ((version & 0x000000FF)) 1252 1253 /* 1254 * This is the function JDK_GetVersionInfo0 defined in libjava.so 1255 * that is dynamically looked up by JVM. 1256 */ 1257 typedef void (*jdk_version_info_fn_t)(jdk_version_info* info, size_t info_size); 1258 1259 /* 1260 * This structure is used by the launcher to get the default thread 1261 * stack size from the VM using JNI_GetDefaultJavaVMInitArgs() with a 1262 * version of 1.1. As it is not supported otherwise, it has been removed 1263 * from jni.h 1264 */ 1265 typedef struct JDK1_1InitArgs { 1266 jint version; 1267 1268 char **properties; 1269 jint checkSource; 1270 jint nativeStackSize; 1271 jint javaStackSize; 1272 jint minHeapSize; 1273 jint maxHeapSize; 1274 jint verifyMode; 1275 char *classpath; 1276 1277 jint (JNICALL *vfprintf)(FILE *fp, const char *format, va_list args); 1278 void (JNICALL *exit)(jint code); 1279 void (JNICALL *abort)(void); 1280 1281 jint enableClassGC; 1282 jint enableVerboseGC; 1283 jint disableAsyncGC; 1284 jint verbose; 1285 jboolean debugging; 1286 jint debugPort; 1287 } JDK1_1InitArgs; 1288 1289 1290 #ifdef __cplusplus 1291 } /* extern "C" */ 1292 1293 #endif /* __cplusplus */ 1294 1295 #endif /* !_JAVASOFT_JVM_H_ */