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.StackWalker
 196  */
 197 enum {
 198   JVM_STACKWALK_FILL_CLASS_REFS_ONLY       = 0x2,
 199   JVM_STACKWALK_GET_CALLER_CLASS           = 0x04,
 200   JVM_STACKWALK_SHOW_HIDDEN_FRAMES         = 0x20,
 201   JVM_STACKWALK_FILL_LIVE_STACK_FRAMES     = 0x100
 202 };
 203 
 204 JNIEXPORT jobject JNICALL
 205 JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jlong mode,
 206                   jint skip_frames, jint frame_count, jint start_index,
 207                   jobjectArray frames);
 208 
 209 JNIEXPORT jint JNICALL
 210 JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jlong mode, jlong anchor,
 211                   jint frame_count, jint start_index,
 212                   jobjectArray frames);
 213 
 214 /*
 215  * java.lang.Thread
 216  */
 217 JNIEXPORT void JNICALL
 218 JVM_StartThread(JNIEnv *env, jobject thread);
 219 
 220 JNIEXPORT void JNICALL
 221 JVM_StopThread(JNIEnv *env, jobject thread, jobject exception);
 222 
 223 JNIEXPORT jboolean JNICALL
 224 JVM_IsThreadAlive(JNIEnv *env, jobject thread);
 225 
 226 JNIEXPORT void JNICALL
 227 JVM_SuspendThread(JNIEnv *env, jobject thread);
 228 
 229 JNIEXPORT void JNICALL
 230 JVM_ResumeThread(JNIEnv *env, jobject thread);
 231 
 232 JNIEXPORT void JNICALL
 233 JVM_SetThreadPriority(JNIEnv *env, jobject thread, jint prio);
 234 
 235 JNIEXPORT void JNICALL
 236 JVM_Yield(JNIEnv *env, jclass threadClass);
 237 
 238 JNIEXPORT void JNICALL
 239 JVM_Sleep(JNIEnv *env, jclass threadClass, jlong millis);
 240 
 241 JNIEXPORT jobject JNICALL
 242 JVM_CurrentThread(JNIEnv *env, jclass threadClass);
 243 
 244 JNIEXPORT jint JNICALL
 245 JVM_CountStackFrames(JNIEnv *env, jobject thread);
 246 
 247 JNIEXPORT void JNICALL
 248 JVM_Interrupt(JNIEnv *env, jobject thread);
 249 
 250 JNIEXPORT jboolean JNICALL
 251 JVM_IsInterrupted(JNIEnv *env, jobject thread, jboolean clearInterrupted);
 252 
 253 JNIEXPORT jboolean JNICALL
 254 JVM_HoldsLock(JNIEnv *env, jclass threadClass, jobject obj);
 255 
 256 JNIEXPORT void JNICALL
 257 JVM_DumpAllStacks(JNIEnv *env, jclass unused);
 258 
 259 JNIEXPORT jobjectArray JNICALL
 260 JVM_GetAllThreads(JNIEnv *env, jclass dummy);
 261 
 262 JNIEXPORT void JNICALL
 263 JVM_SetNativeThreadName(JNIEnv *env, jobject jthread, jstring name);
 264 
 265 /* getStackTrace() and getAllStackTraces() method */
 266 JNIEXPORT jobjectArray JNICALL
 267 JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads);
 268 
 269 /*
 270  * java.lang.SecurityManager
 271  */
 272 JNIEXPORT jobjectArray JNICALL
 273 JVM_GetClassContext(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.lang.ref.Reference
 286  */
 287 JNIEXPORT jobject JNICALL
 288 JVM_GetAndClearReferencePendingList(JNIEnv *env);
 289 
 290 JNIEXPORT jboolean JNICALL
 291 JVM_HasReferencePendingList(JNIEnv *env);
 292 
 293 JNIEXPORT void JNICALL
 294 JVM_WaitForReferencePendingList(JNIEnv *env);
 295 
 296 /*
 297  * java.io.ObjectInputStream
 298  */
 299 JNIEXPORT jobject JNICALL
 300 JVM_LatestUserDefinedLoader(JNIEnv *env);
 301 
 302 /*
 303  * java.lang.reflect.Array
 304  */
 305 JNIEXPORT jint JNICALL
 306 JVM_GetArrayLength(JNIEnv *env, jobject arr);
 307 
 308 JNIEXPORT jobject JNICALL
 309 JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index);
 310 
 311 JNIEXPORT jvalue JNICALL
 312 JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode);
 313 
 314 JNIEXPORT void JNICALL
 315 JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val);
 316 
 317 JNIEXPORT void JNICALL
 318 JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v,
 319                              unsigned char vCode);
 320 
 321 JNIEXPORT jobject JNICALL
 322 JVM_NewArray(JNIEnv *env, jclass eltClass, jint length);
 323 
 324 JNIEXPORT jobject JNICALL
 325 JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim);
 326 
 327 
 328 /*
 329  * Returns the immediate caller class of the native method invoking
 330  * JVM_GetCallerClass.  The Method.invoke and other frames due to
 331  * reflection machinery are skipped.
 332  *
 333  * The caller is expected to be marked with
 334  * jdk.internal.reflect.CallerSensitive. The JVM will throw an
 335  * error if it is not marked properly.
 336  */
 337 JNIEXPORT jclass JNICALL
 338 JVM_GetCallerClass(JNIEnv *env);
 339 
 340 
 341 /*
 342  * Find primitive classes
 343  * utf: class name
 344  */
 345 JNIEXPORT jclass JNICALL
 346 JVM_FindPrimitiveClass(JNIEnv *env, const char *utf);
 347 
 348 /*
 349  * Link the 'arg' class (unless ClassForNameDeferLinking is set)
 350  */
 351 JNIEXPORT void JNICALL
 352 JVM_LinkClass(JNIEnv *env, jclass classClass, jclass arg);
 353 
 354 /*
 355  * Find a class from a boot class loader. Returns NULL if class not found.
 356  */
 357 JNIEXPORT jclass JNICALL
 358 JVM_FindClassFromBootLoader(JNIEnv *env, const char *name);
 359 
 360 /*
 361  * Find a class from a given class loader.  Throws ClassNotFoundException.
 362  *  name:   name of class
 363  *  init:   whether initialization is done
 364  *  loader: class loader to look up the class. This may not be the same as the caller's
 365  *          class loader.
 366  *  caller: initiating class. The initiating class may be null when a security
 367  *          manager is not installed.
 368  */
 369 JNIEXPORT jclass JNICALL
 370 JVM_FindClassFromCaller(JNIEnv *env, const char *name, jboolean init,
 371                         jobject loader, jclass caller);
 372 
 373 /*
 374  * Find a class from a given class.
 375  */
 376 JNIEXPORT jclass JNICALL
 377 JVM_FindClassFromClass(JNIEnv *env, const char *name, jboolean init,
 378                              jclass from);
 379 
 380 /* Find a loaded class cached by the VM */
 381 JNIEXPORT jclass JNICALL
 382 JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name);
 383 
 384 /* Define a class */
 385 JNIEXPORT jclass JNICALL
 386 JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf,
 387                 jsize len, jobject pd);
 388 
 389 /* Define a class with a source (added in JDK1.5) */
 390 JNIEXPORT jclass JNICALL
 391 JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader,
 392                           const jbyte *buf, jsize len, jobject pd,
 393                           const char *source);
 394 
 395 /*
 396  * Module support funcions
 397  */
 398 
 399 /*
 400  * Define a module with the specified packages and bind the module to the
 401  * given class loader.
 402  *  module:       module to define
 403  *  is_open:      specifies if module is open (currently ignored)
 404  *  version:      the module version
 405  *  location:     the module location
 406  *  packages:     list of packages in the module
 407  *  num_packages: number of packages in the module
 408  */
 409 JNIEXPORT void JNICALL
 410 JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
 411                  jstring location, const char* const* packages, jsize num_packages);
 412 
 413 /*
 414  * Set the boot loader's unnamed module.
 415  *  module: boot loader's unnamed module
 416  */
 417 JNIEXPORT void JNICALL
 418 JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module);
 419 
 420 /*
 421  * Do a qualified export of a package.
 422  *  from_module: module containing the package to export
 423  *  package:     name of the package to export
 424  *  to_module:   module to export the package to
 425  */
 426 JNIEXPORT void JNICALL
 427 JVM_AddModuleExports(JNIEnv *env, jobject from_module, const char* package, jobject to_module);
 428 
 429 /*
 430  * Do an export of a package to all unnamed modules.
 431  *  from_module: module containing the package to export
 432  *  package:     name of the package to export to all unnamed modules
 433  */
 434 JNIEXPORT void JNICALL
 435 JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, const char* package);
 436 
 437 /*
 438  * Do an unqualified export of a package.
 439  *  from_module: module containing the package to export
 440  *  package:     name of the package to export
 441  */
 442 JNIEXPORT void JNICALL
 443 JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, const char* package);
 444 
 445 /*
 446  * Add a module to the list of modules that a given module can read.
 447  *  from_module:   module requesting read access
 448  *  source_module: module that from_module wants to read
 449  */
 450 JNIEXPORT void JNICALL
 451 JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module);
 452 
 453 /*
 454  * Reflection support functions
 455  */
 456 
 457 JNIEXPORT jstring JNICALL
 458 JVM_InitClassName(JNIEnv *env, jclass cls);
 459 
 460 JNIEXPORT jobjectArray JNICALL
 461 JVM_GetClassInterfaces(JNIEnv *env, jclass cls);
 462 
 463 JNIEXPORT jboolean JNICALL
 464 JVM_IsInterface(JNIEnv *env, jclass cls);
 465 
 466 JNIEXPORT jobjectArray JNICALL
 467 JVM_GetClassSigners(JNIEnv *env, jclass cls);
 468 
 469 JNIEXPORT void JNICALL
 470 JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers);
 471 
 472 JNIEXPORT jobject JNICALL
 473 JVM_GetProtectionDomain(JNIEnv *env, jclass cls);
 474 
 475 JNIEXPORT jboolean JNICALL
 476 JVM_IsArrayClass(JNIEnv *env, jclass cls);
 477 
 478 JNIEXPORT jboolean JNICALL
 479 JVM_IsPrimitiveClass(JNIEnv *env, jclass cls);
 480 
 481 JNIEXPORT jint JNICALL
 482 JVM_GetClassModifiers(JNIEnv *env, jclass cls);
 483 
 484 JNIEXPORT jobjectArray JNICALL
 485 JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass);
 486 
 487 JNIEXPORT jclass JNICALL
 488 JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass);
 489 
 490 JNIEXPORT jstring JNICALL
 491 JVM_GetSimpleBinaryName(JNIEnv *env, jclass ofClass);
 492 
 493 /* Generics support (JDK 1.5) */
 494 JNIEXPORT jstring JNICALL
 495 JVM_GetClassSignature(JNIEnv *env, jclass cls);
 496 
 497 /* Annotations support (JDK 1.5) */
 498 JNIEXPORT jbyteArray JNICALL
 499 JVM_GetClassAnnotations(JNIEnv *env, jclass cls);
 500 
 501 /* Type use annotations support (JDK 1.8) */
 502 
 503 JNIEXPORT jbyteArray JNICALL
 504 JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls);
 505 
 506 JNIEXPORT jbyteArray JNICALL
 507 JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field);
 508 
 509 JNIEXPORT jbyteArray JNICALL
 510 JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method);
 511 
 512 /*
 513  * New (JDK 1.4) reflection implementation
 514  */
 515 
 516 JNIEXPORT jobjectArray JNICALL
 517 JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly);
 518 
 519 JNIEXPORT jobjectArray JNICALL
 520 JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly);
 521 
 522 JNIEXPORT jobjectArray JNICALL
 523 JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly);
 524 
 525 /* Differs from JVM_GetClassModifiers in treatment of inner classes.
 526    This returns the access flags for the class as specified in the
 527    class file rather than searching the InnerClasses attribute (if
 528    present) to find the source-level access flags. Only the values of
 529    the low 13 bits (i.e., a mask of 0x1FFF) are guaranteed to be
 530    valid. */
 531 JNIEXPORT jint JNICALL
 532 JVM_GetClassAccessFlags(JNIEnv *env, jclass cls);
 533 
 534 /* Nestmates - since JDK 11 */
 535 
 536 JNIEXPORT jboolean JNICALL
 537 JVM_AreNestMates(JNIEnv *env, jclass current, jclass member);
 538 
 539 JNIEXPORT jclass JNICALL
 540 JVM_GetNestHost(JNIEnv *env, jclass current);
 541 
 542 JNIEXPORT jobjectArray JNICALL
 543 JVM_GetNestMembers(JNIEnv *env, jclass current);
 544 
 545 /* The following two reflection routines are still needed due to startup time issues */
 546 /*
 547  * java.lang.reflect.Method
 548  */
 549 JNIEXPORT jobject JNICALL
 550 JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0);
 551 
 552 /*
 553  * java.lang.reflect.Constructor
 554  */
 555 JNIEXPORT jobject JNICALL
 556 JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0);
 557 
 558 /*
 559  * Constant pool access; currently used to implement reflective access to annotations (JDK 1.5)
 560  */
 561 
 562 JNIEXPORT jobject JNICALL
 563 JVM_GetClassConstantPool(JNIEnv *env, jclass cls);
 564 
 565 JNIEXPORT jint JNICALL JVM_ConstantPoolGetSize
 566 (JNIEnv *env, jobject unused, jobject jcpool);
 567 
 568 JNIEXPORT jclass JNICALL JVM_ConstantPoolGetClassAt
 569 (JNIEnv *env, jobject unused, jobject jcpool, jint index);
 570 
 571 JNIEXPORT jclass JNICALL JVM_ConstantPoolGetClassAtIfLoaded
 572 (JNIEnv *env, jobject unused, jobject jcpool, jint index);
 573 
 574 JNIEXPORT jint JNICALL JVM_ConstantPoolGetClassRefIndexAt
 575 (JNIEnv *env, jobject obj, jobject unused, jint index);
 576 
 577 JNIEXPORT jobject JNICALL JVM_ConstantPoolGetMethodAt
 578 (JNIEnv *env, jobject unused, jobject jcpool, jint index);
 579 
 580 JNIEXPORT jobject JNICALL JVM_ConstantPoolGetMethodAtIfLoaded
 581 (JNIEnv *env, jobject unused, jobject jcpool, jint index);
 582 
 583 JNIEXPORT jobject JNICALL JVM_ConstantPoolGetFieldAt
 584 (JNIEnv *env, jobject unused, jobject jcpool, jint index);
 585 
 586 JNIEXPORT jobject JNICALL JVM_ConstantPoolGetFieldAtIfLoaded
 587 (JNIEnv *env, jobject unused, jobject jcpool, jint index);
 588 
 589 JNIEXPORT jobjectArray JNICALL JVM_ConstantPoolGetMemberRefInfoAt
 590 (JNIEnv *env, jobject unused, jobject jcpool, jint index);
 591 
 592 JNIEXPORT jint JNICALL JVM_ConstantPoolGetNameAndTypeRefIndexAt
 593 (JNIEnv *env, jobject obj, jobject unused, jint index);
 594 
 595 JNIEXPORT jobjectArray JNICALL JVM_ConstantPoolGetNameAndTypeRefInfoAt
 596 (JNIEnv *env, jobject obj, jobject unused, jint index);
 597 
 598 JNIEXPORT jint JNICALL JVM_ConstantPoolGetIntAt
 599 (JNIEnv *env, jobject unused, jobject jcpool, jint index);
 600 
 601 JNIEXPORT jlong JNICALL JVM_ConstantPoolGetLongAt
 602 (JNIEnv *env, jobject unused, jobject jcpool, jint index);
 603 
 604 JNIEXPORT jfloat JNICALL JVM_ConstantPoolGetFloatAt
 605 (JNIEnv *env, jobject unused, jobject jcpool, jint index);
 606 
 607 JNIEXPORT jdouble JNICALL JVM_ConstantPoolGetDoubleAt
 608 (JNIEnv *env, jobject unused, jobject jcpool, jint index);
 609 
 610 JNIEXPORT jstring JNICALL JVM_ConstantPoolGetStringAt
 611 (JNIEnv *env, jobject unused, jobject jcpool, jint index);
 612 
 613 JNIEXPORT jstring JNICALL JVM_ConstantPoolGetUTF8At
 614 (JNIEnv *env, jobject unused, jobject jcpool, jint index);
 615 
 616 JNIEXPORT jbyte JNICALL JVM_ConstantPoolGetTagAt
 617 (JNIEnv *env, jobject unused, jobject jcpool, jint index);
 618 
 619 /*
 620  * Parameter reflection
 621  */
 622 
 623 JNIEXPORT jobjectArray JNICALL
 624 JVM_GetMethodParameters(JNIEnv *env, jobject method);
 625 
 626 /*
 627  * java.security.*
 628  */
 629 
 630 JNIEXPORT jobject JNICALL
 631 JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls);
 632 
 633 /*
 634  * Ensure that code doing a stackwalk and using javaVFrame::locals() to
 635  * get the value will see a materialized value and not a scalar-replaced
 636  * null value.
 637  */
 638 #define JVM_EnsureMaterializedForStackWalk(env, value) \
 639     do {} while(0) // Nothing to do.  The fact that the value escaped
 640                    // through a native method is enough.
 641 
 642 JNIEXPORT jobject JNICALL
 643 JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls);
 644 
 645 /*
 646  * Signal support, used to implement the shutdown sequence.  Every VM must
 647  * support JVM_SIGINT and JVM_SIGTERM, raising the former for user interrupts
 648  * (^C) and the latter for external termination (kill, system shutdown, etc.).
 649  * Other platform-dependent signal values may also be supported.
 650  */
 651 
 652 JNIEXPORT void * JNICALL
 653 JVM_RegisterSignal(jint sig, void *handler);
 654 
 655 JNIEXPORT jboolean JNICALL
 656 JVM_RaiseSignal(jint sig);
 657 
 658 JNIEXPORT jint JNICALL
 659 JVM_FindSignal(const char *name);
 660 
 661 /*
 662  * Retrieve the assertion directives for the specified class.
 663  */
 664 JNIEXPORT jboolean JNICALL
 665 JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls);
 666 
 667 /*
 668  * Retrieve the assertion directives from the VM.
 669  */
 670 JNIEXPORT jobject JNICALL
 671 JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused);
 672 
 673 /*
 674  * java.util.concurrent.atomic.AtomicLong
 675  */
 676 JNIEXPORT jboolean JNICALL
 677 JVM_SupportsCX8(void);
 678 
 679 /*
 680  * com.sun.dtrace.jsdt support
 681  */
 682 
 683 #define JVM_TRACING_DTRACE_VERSION 1
 684 
 685 /*
 686  * Structure to pass one probe description to JVM
 687  */
 688 typedef struct {
 689     jmethodID method;
 690     jstring   function;
 691     jstring   name;
 692     void*            reserved[4];     // for future use
 693 } JVM_DTraceProbe;
 694 
 695 /**
 696  * Encapsulates the stability ratings for a DTrace provider field
 697  */
 698 typedef struct {
 699     jint nameStability;
 700     jint dataStability;
 701     jint dependencyClass;
 702 } JVM_DTraceInterfaceAttributes;
 703 
 704 /*
 705  * Structure to pass one provider description to JVM
 706  */
 707 typedef struct {
 708     jstring                       name;
 709     JVM_DTraceProbe*              probes;
 710     jint                          probe_count;
 711     JVM_DTraceInterfaceAttributes providerAttributes;
 712     JVM_DTraceInterfaceAttributes moduleAttributes;
 713     JVM_DTraceInterfaceAttributes functionAttributes;
 714     JVM_DTraceInterfaceAttributes nameAttributes;
 715     JVM_DTraceInterfaceAttributes argsAttributes;
 716     void*                         reserved[4]; // for future use
 717 } JVM_DTraceProvider;
 718 
 719 /*
 720  * Get the version number the JVM was built with
 721  */
 722 JNIEXPORT jint JNICALL
 723 JVM_DTraceGetVersion(JNIEnv* env);
 724 
 725 /*
 726  * Register new probe with given signature, return global handle
 727  *
 728  * The version passed in is the version that the library code was
 729  * built with.
 730  */
 731 JNIEXPORT jlong JNICALL
 732 JVM_DTraceActivate(JNIEnv* env, jint version, jstring module_name,
 733   jint providers_count, JVM_DTraceProvider* providers);
 734 
 735 /*
 736  * Check JSDT probe
 737  */
 738 JNIEXPORT jboolean JNICALL
 739 JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method);
 740 
 741 /*
 742  * Destroy custom DOF
 743  */
 744 JNIEXPORT void JNICALL
 745 JVM_DTraceDispose(JNIEnv* env, jlong activation_handle);
 746 
 747 /*
 748  * Check to see if DTrace is supported by OS
 749  */
 750 JNIEXPORT jboolean JNICALL
 751 JVM_DTraceIsSupported(JNIEnv* env);
 752 
 753 /*************************************************************************
 754  PART 2: Support for the Verifier and Class File Format Checker
 755  ************************************************************************/
 756 /*
 757  * Return the class name in UTF format. The result is valid
 758  * until JVM_ReleaseUTf is called.
 759  *
 760  * The caller must treat the string as a constant and not modify it
 761  * in any way.
 762  */
 763 JNIEXPORT const char * JNICALL
 764 JVM_GetClassNameUTF(JNIEnv *env, jclass cb);
 765 
 766 /*
 767  * Returns the constant pool types in the buffer provided by "types."
 768  */
 769 JNIEXPORT void JNICALL
 770 JVM_GetClassCPTypes(JNIEnv *env, jclass cb, unsigned char *types);
 771 
 772 /*
 773  * Returns the number of Constant Pool entries.
 774  */
 775 JNIEXPORT jint JNICALL
 776 JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cb);
 777 
 778 /*
 779  * Returns the number of *declared* fields or methods.
 780  */
 781 JNIEXPORT jint JNICALL
 782 JVM_GetClassFieldsCount(JNIEnv *env, jclass cb);
 783 
 784 JNIEXPORT jint JNICALL
 785 JVM_GetClassMethodsCount(JNIEnv *env, jclass cb);
 786 
 787 /*
 788  * Returns the CP indexes of exceptions raised by a given method.
 789  * Places the result in the given buffer.
 790  *
 791  * The method is identified by method_index.
 792  */
 793 JNIEXPORT void JNICALL
 794 JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cb, jint method_index,
 795                                 unsigned short *exceptions);
 796 /*
 797  * Returns the number of exceptions raised by a given method.
 798  * The method is identified by method_index.
 799  */
 800 JNIEXPORT jint JNICALL
 801 JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cb, jint method_index);
 802 
 803 /*
 804  * Returns the byte code sequence of a given method.
 805  * Places the result in the given buffer.
 806  *
 807  * The method is identified by method_index.
 808  */
 809 JNIEXPORT void JNICALL
 810 JVM_GetMethodIxByteCode(JNIEnv *env, jclass cb, jint method_index,
 811                         unsigned char *code);
 812 
 813 /*
 814  * Returns the length of the byte code sequence of a given method.
 815  * The method is identified by method_index.
 816  */
 817 JNIEXPORT jint JNICALL
 818 JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cb, jint method_index);
 819 
 820 /*
 821  * A structure used to a capture exception table entry in a Java method.
 822  */
 823 typedef struct {
 824     jint start_pc;
 825     jint end_pc;
 826     jint handler_pc;
 827     jint catchType;
 828 } JVM_ExceptionTableEntryType;
 829 
 830 /*
 831  * Returns the exception table entry at entry_index of a given method.
 832  * Places the result in the given buffer.
 833  *
 834  * The method is identified by method_index.
 835  */
 836 JNIEXPORT void JNICALL
 837 JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cb, jint method_index,
 838                                    jint entry_index,
 839                                    JVM_ExceptionTableEntryType *entry);
 840 
 841 /*
 842  * Returns the length of the exception table of a given method.
 843  * The method is identified by method_index.
 844  */
 845 JNIEXPORT jint JNICALL
 846 JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cb, int index);
 847 
 848 /*
 849  * Returns the modifiers of a given field.
 850  * The field is identified by field_index.
 851  */
 852 JNIEXPORT jint JNICALL
 853 JVM_GetFieldIxModifiers(JNIEnv *env, jclass cb, int index);
 854 
 855 /*
 856  * Returns the modifiers of a given method.
 857  * The method is identified by method_index.
 858  */
 859 JNIEXPORT jint JNICALL
 860 JVM_GetMethodIxModifiers(JNIEnv *env, jclass cb, int index);
 861 
 862 /*
 863  * Returns the number of local variables of a given method.
 864  * The method is identified by method_index.
 865  */
 866 JNIEXPORT jint JNICALL
 867 JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cb, int index);
 868 
 869 /*
 870  * Returns the number of arguments (including this pointer) of a given method.
 871  * The method is identified by method_index.
 872  */
 873 JNIEXPORT jint JNICALL
 874 JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cb, int index);
 875 
 876 /*
 877  * Returns the maximum amount of stack (in words) used by a given method.
 878  * The method is identified by method_index.
 879  */
 880 JNIEXPORT jint JNICALL
 881 JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cb, int index);
 882 
 883 /*
 884  * Is a given method a constructor.
 885  * The method is identified by method_index.
 886  */
 887 JNIEXPORT jboolean JNICALL
 888 JVM_IsConstructorIx(JNIEnv *env, jclass cb, int index);
 889 
 890 /*
 891  * Is the given method generated by the VM.
 892  * The method is identified by method_index.
 893  */
 894 JNIEXPORT jboolean JNICALL
 895 JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cb, int index);
 896 
 897 /*
 898  * Returns the name of a given method in UTF format.
 899  * The result remains valid until JVM_ReleaseUTF is called.
 900  *
 901  * The caller must treat the string as a constant and not modify it
 902  * in any way.
 903  */
 904 JNIEXPORT const char * JNICALL
 905 JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cb, jint index);
 906 
 907 /*
 908  * Returns the signature of a given method in UTF format.
 909  * The result remains valid until JVM_ReleaseUTF is called.
 910  *
 911  * The caller must treat the string as a constant and not modify it
 912  * in any way.
 913  */
 914 JNIEXPORT const char * JNICALL
 915 JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cb, jint index);
 916 
 917 /*
 918  * Returns the name of the field referred to at a given constant pool
 919  * 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_GetCPFieldNameUTF(JNIEnv *env, jclass cb, jint index);
 929 
 930 /*
 931  * Returns the name of the method referred to at a given constant pool
 932  * index.
 933  *
 934  * The result is in UTF format and remains valid until JVM_ReleaseUTF
 935  * is called.
 936  *
 937  * The caller must treat the string as a constant and not modify it
 938  * in any way.
 939  */
 940 JNIEXPORT const char * JNICALL
 941 JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cb, jint index);
 942 
 943 /*
 944  * Returns the signature of the method referred to at a given constant pool
 945  * index.
 946  *
 947  * The result is in UTF format and remains valid until JVM_ReleaseUTF
 948  * is called.
 949  *
 950  * The caller must treat the string as a constant and not modify it
 951  * in any way.
 952  */
 953 JNIEXPORT const char * JNICALL
 954 JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cb, jint index);
 955 
 956 /*
 957  * Returns the signature of the field referred to at a given constant pool
 958  * index.
 959  *
 960  * The result is in UTF format and remains valid until JVM_ReleaseUTF
 961  * is called.
 962  *
 963  * The caller must treat the string as a constant and not modify it
 964  * in any way.
 965  */
 966 JNIEXPORT const char * JNICALL
 967 JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cb, jint index);
 968 
 969 /*
 970  * Returns the class name referred to at a given constant pool index.
 971  *
 972  * The result is in UTF format and remains valid until JVM_ReleaseUTF
 973  * is called.
 974  *
 975  * The caller must treat the string as a constant and not modify it
 976  * in any way.
 977  */
 978 JNIEXPORT const char * JNICALL
 979 JVM_GetCPClassNameUTF(JNIEnv *env, jclass cb, jint index);
 980 
 981 /*
 982  * Returns the class name referred to at a given constant pool index.
 983  *
 984  * The constant pool entry must refer to a CONSTANT_Fieldref.
 985  *
 986  * The result is in UTF format and remains valid until JVM_ReleaseUTF
 987  * is called.
 988  *
 989  * The caller must treat the string as a constant and not modify it
 990  * in any way.
 991  */
 992 JNIEXPORT const char * JNICALL
 993 JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cb, jint index);
 994 
 995 /*
 996  * Returns the class name referred to at a given constant pool index.
 997  *
 998  * The constant pool entry must refer to CONSTANT_Methodref or
 999  * CONSTANT_InterfaceMethodref.
1000  *
1001  * The result is in UTF format and remains valid until JVM_ReleaseUTF
1002  * is called.
1003  *
1004  * The caller must treat the string as a constant and not modify it
1005  * in any way.
1006  */
1007 JNIEXPORT const char * JNICALL
1008 JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cb, jint index);
1009 
1010 /*
1011  * Returns the modifiers of a field in calledClass. The field is
1012  * referred to in class cb at constant pool entry index.
1013  *
1014  * The caller must treat the string as a constant and not modify it
1015  * in any way.
1016  *
1017  * Returns -1 if the field does not exist in calledClass.
1018  */
1019 JNIEXPORT jint JNICALL
1020 JVM_GetCPFieldModifiers(JNIEnv *env, jclass cb, int index, jclass calledClass);
1021 
1022 /*
1023  * Returns the modifiers of a method in calledClass. The method is
1024  * referred to in class cb at constant pool entry index.
1025  *
1026  * Returns -1 if the method does not exist in calledClass.
1027  */
1028 JNIEXPORT jint JNICALL
1029 JVM_GetCPMethodModifiers(JNIEnv *env, jclass cb, int index, jclass calledClass);
1030 
1031 /*
1032  * Releases the UTF string obtained from the VM.
1033  */
1034 JNIEXPORT void JNICALL
1035 JVM_ReleaseUTF(const char *utf);
1036 
1037 /*
1038  * Compare if two classes are in the same package.
1039  */
1040 JNIEXPORT jboolean JNICALL
1041 JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2);
1042 
1043 /* Get classfile constants */
1044 #include "classfile_constants.h"
1045 
1046 /*
1047  * A function defined by the byte-code verifier and called by the VM.
1048  * This is not a function implemented in the VM.
1049  *
1050  * Returns JNI_FALSE if verification fails. A detailed error message
1051  * will be places in msg_buf, whose length is specified by buf_len.
1052  */
1053 typedef jboolean (*verifier_fn_t)(JNIEnv *env,
1054                                   jclass cb,
1055                                   char * msg_buf,
1056                                   jint buf_len);
1057 
1058 
1059 /*
1060  * Support for a VM-independent class format checker.
1061  */
1062 typedef struct {
1063     unsigned long code;    /* byte code */
1064     unsigned long excs;    /* exceptions */
1065     unsigned long etab;    /* catch table */
1066     unsigned long lnum;    /* line number */
1067     unsigned long lvar;    /* local vars */
1068 } method_size_info;
1069 
1070 typedef struct {
1071     unsigned int constants;    /* constant pool */
1072     unsigned int fields;
1073     unsigned int methods;
1074     unsigned int interfaces;
1075     unsigned int fields2;      /* number of static 2-word fields */
1076     unsigned int innerclasses; /* # of records in InnerClasses attr */
1077 
1078     method_size_info clinit;   /* memory used in clinit */
1079     method_size_info main;     /* used everywhere else */
1080 } class_size_info;
1081 
1082 /*
1083  * Functions defined in libjava.so to perform string conversions.
1084  *
1085  */
1086 
1087 typedef jstring (*to_java_string_fn_t)(JNIEnv *env, char *str);
1088 
1089 typedef char *(*to_c_string_fn_t)(JNIEnv *env, jstring s, jboolean *b);
1090 
1091 /* This is the function defined in libjava.so that performs class
1092  * format checks. This functions fills in size information about
1093  * the class file and returns:
1094  *
1095  *   0: good
1096  *  -1: out of memory
1097  *  -2: bad format
1098  *  -3: unsupported version
1099  *  -4: bad class name
1100  */
1101 
1102 typedef jint (*check_format_fn_t)(char *class_name,
1103                                   unsigned char *data,
1104                                   unsigned int data_size,
1105                                   class_size_info *class_size,
1106                                   char *message_buffer,
1107                                   jint buffer_length,
1108                                   jboolean measure_only,
1109                                   jboolean check_relaxed);
1110 
1111 #define JVM_RECOGNIZED_CLASS_MODIFIERS (JVM_ACC_PUBLIC | \
1112                                         JVM_ACC_FINAL | \
1113                                         JVM_ACC_SUPER | \
1114                                         JVM_ACC_INTERFACE | \
1115                                         JVM_ACC_ABSTRACT | \
1116                                         JVM_ACC_ANNOTATION | \
1117                                         JVM_ACC_ENUM | \
1118                                         JVM_ACC_SYNTHETIC)
1119 
1120 #define JVM_RECOGNIZED_FIELD_MODIFIERS (JVM_ACC_PUBLIC | \
1121                                         JVM_ACC_PRIVATE | \
1122                                         JVM_ACC_PROTECTED | \
1123                                         JVM_ACC_STATIC | \
1124                                         JVM_ACC_FINAL | \
1125                                         JVM_ACC_VOLATILE | \
1126                                         JVM_ACC_TRANSIENT | \
1127                                         JVM_ACC_ENUM | \
1128                                         JVM_ACC_SYNTHETIC)
1129 
1130 #define JVM_RECOGNIZED_METHOD_MODIFIERS (JVM_ACC_PUBLIC | \
1131                                          JVM_ACC_PRIVATE | \
1132                                          JVM_ACC_PROTECTED | \
1133                                          JVM_ACC_STATIC | \
1134                                          JVM_ACC_FINAL | \
1135                                          JVM_ACC_SYNCHRONIZED | \
1136                                          JVM_ACC_BRIDGE | \
1137                                          JVM_ACC_VARARGS | \
1138                                          JVM_ACC_NATIVE | \
1139                                          JVM_ACC_ABSTRACT | \
1140                                          JVM_ACC_STRICT | \
1141                                          JVM_ACC_SYNTHETIC)
1142 
1143 /*
1144  * This is the function defined in libjava.so to perform path
1145  * canonicalization. VM call this function before opening jar files
1146  * to load system classes.
1147  *
1148  */
1149 
1150 typedef int (*canonicalize_fn_t)(JNIEnv *env, char *orig, char *out, int len);
1151 
1152 /*************************************************************************
1153  PART 3: I/O and Network Support
1154  ************************************************************************/
1155 
1156 /*
1157  * Convert a pathname into native format.  This function does syntactic
1158  * cleanup, such as removing redundant separator characters.  It modifies
1159  * the given pathname string in place.
1160  */
1161 JNIEXPORT char * JNICALL
1162 JVM_NativePath(char *);
1163 
1164 /*
1165  * The standard printing functions supported by the Java VM. (Should they
1166  * be renamed to JVM_* in the future?
1167  */
1168 
1169 /* jio_snprintf() and jio_vsnprintf() behave like snprintf(3) and vsnprintf(3),
1170  *  respectively, with the following differences:
1171  * - The string written to str is always zero-terminated, also in case of
1172  *   truncation (count is too small to hold the result string), unless count
1173  *   is 0. In case of truncation count-1 characters are written and '\0'
1174  *   appendend.
1175  * - If count is too small to hold the whole string, -1 is returned across
1176  *   all platforms. */
1177 
1178 JNIEXPORT int
1179 jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args);
1180 
1181 JNIEXPORT int
1182 jio_snprintf(char *str, size_t count, const char *fmt, ...);
1183 
1184 JNIEXPORT int
1185 jio_fprintf(FILE *, const char *fmt, ...);
1186 
1187 JNIEXPORT int
1188 jio_vfprintf(FILE *, const char *fmt, va_list args);
1189 
1190 
1191 JNIEXPORT void * JNICALL
1192 JVM_RawMonitorCreate(void);
1193 
1194 JNIEXPORT void JNICALL
1195 JVM_RawMonitorDestroy(void *mon);
1196 
1197 JNIEXPORT jint JNICALL
1198 JVM_RawMonitorEnter(void *mon);
1199 
1200 JNIEXPORT void JNICALL
1201 JVM_RawMonitorExit(void *mon);
1202 
1203 /*
1204  * java.lang.management support
1205  */
1206 JNIEXPORT void* JNICALL
1207 JVM_GetManagement(jint version);
1208 
1209 /*
1210  * com.sun.tools.attach.VirtualMachine support
1211  *
1212  * Initialize the agent properties with the properties maintained in the VM.
1213  */
1214 JNIEXPORT jobject JNICALL
1215 JVM_InitAgentProperties(JNIEnv *env, jobject agent_props);
1216 
1217 JNIEXPORT jstring JNICALL
1218 JVM_GetTemporaryDirectory(JNIEnv *env);
1219 
1220 /* Generics reflection support.
1221  *
1222  * Returns information about the given class's EnclosingMethod
1223  * attribute, if present, or null if the class had no enclosing
1224  * method.
1225  *
1226  * If non-null, the returned array contains three elements. Element 0
1227  * is the java.lang.Class of which the enclosing method is a member,
1228  * and elements 1 and 2 are the java.lang.Strings for the enclosing
1229  * method's name and descriptor, respectively.
1230  */
1231 JNIEXPORT jobjectArray JNICALL
1232 JVM_GetEnclosingMethodInfo(JNIEnv* env, jclass ofClass);
1233 
1234 /* =========================================================================
1235  * The following defines a private JVM interface that the JDK can query
1236  * for the JVM version and capabilities.  sun.misc.Version defines
1237  * the methods for getting the VM version and its capabilities.
1238  *
1239  * When a new bit is added, the following should be updated to provide
1240  * access to the new capability:
1241  *    HS:   JVM_GetVersionInfo and Abstract_VM_Version class
1242  *    SDK:  Version class
1243  *
1244  * Similary, a private JDK interface JDK_GetVersionInfo0 is defined for
1245  * JVM to query for the JDK version and capabilities.
1246  *
1247  * When a new bit is added, the following should be updated to provide
1248  * access to the new capability:
1249  *    HS:   JDK_Version class
1250  *    SDK:  JDK_GetVersionInfo0
1251  *
1252  * ==========================================================================
1253  */
1254 typedef struct {
1255     unsigned int jvm_version;  /* Encoded $VNUM as specified by JEP-223 */
1256     unsigned int patch_version : 8; /* JEP-223 patch version */
1257     unsigned int reserved3 : 8;
1258     unsigned int reserved1 : 16;
1259     unsigned int reserved2;
1260 
1261     /* The following bits represents JVM supports that JDK has dependency on.
1262      * JDK can use these bits to determine which JVM version
1263      * and support it has to maintain runtime compatibility.
1264      *
1265      * When a new bit is added in a minor or update release, make sure
1266      * the new bit is also added in the main/baseline.
1267      */
1268     unsigned int is_attach_supported : 1;
1269     unsigned int : 31;
1270     unsigned int : 32;
1271     unsigned int : 32;
1272 } jvm_version_info;
1273 
1274 #define JVM_VERSION_MAJOR(version) ((version & 0xFF000000) >> 24)
1275 #define JVM_VERSION_MINOR(version) ((version & 0x00FF0000) >> 16)
1276 #define JVM_VERSION_SECURITY(version) ((version & 0x0000FF00) >> 8)
1277 #define JVM_VERSION_BUILD(version) ((version & 0x000000FF))
1278 
1279 JNIEXPORT void JNICALL
1280 JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size);
1281 
1282 typedef struct {
1283     unsigned int jdk_version; /* Encoded $VNUM as specified by JEP-223 */
1284     unsigned int patch_version : 8; /* JEP-223 patch version */
1285     unsigned int reserved3 : 8;
1286     unsigned int reserved1 : 16;
1287     unsigned int reserved2;
1288     unsigned int : 32;
1289     unsigned int : 32;
1290     unsigned int : 32;
1291 } jdk_version_info;
1292 
1293 #define JDK_VERSION_MAJOR(version) ((version & 0xFF000000) >> 24)
1294 #define JDK_VERSION_MINOR(version) ((version & 0x00FF0000) >> 16)
1295 #define JDK_VERSION_SECURITY(version) ((version & 0x0000FF00) >> 8)
1296 #define JDK_VERSION_BUILD(version) ((version & 0x000000FF))
1297 
1298 /*
1299  * This is the function JDK_GetVersionInfo0 defined in libjava.so
1300  * that is dynamically looked up by JVM.
1301  */
1302 typedef void (*jdk_version_info_fn_t)(jdk_version_info* info, size_t info_size);
1303 
1304 /*
1305  * This structure is used by the launcher to get the default thread
1306  * stack size from the VM using JNI_GetDefaultJavaVMInitArgs() with a
1307  * version of 1.1.  As it is not supported otherwise, it has been removed
1308  * from jni.h
1309  */
1310 typedef struct JDK1_1InitArgs {
1311     jint version;
1312 
1313     char **properties;
1314     jint checkSource;
1315     jint nativeStackSize;
1316     jint javaStackSize;
1317     jint minHeapSize;
1318     jint maxHeapSize;
1319     jint verifyMode;
1320     char *classpath;
1321 
1322     jint (JNICALL *vfprintf)(FILE *fp, const char *format, va_list args);
1323     void (JNICALL *exit)(jint code);
1324     void (JNICALL *abort)(void);
1325 
1326     jint enableClassGC;
1327     jint enableVerboseGC;
1328     jint disableAsyncGC;
1329     jint verbose;
1330     jboolean debugging;
1331     jint debugPort;
1332 } JDK1_1InitArgs;
1333 
1334 
1335 #ifdef __cplusplus
1336 } /* extern "C" */
1337 
1338 #endif /* __cplusplus */
1339 
1340 #endif /* !_JAVASOFT_JVM_H_ */