1 /* 2 * Copyright (c) 1997, 2009, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "incls/_precompiled.incl" 26 #include "incls/_jvm.cpp.incl" 27 #include <errno.h> 28 29 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long); 30 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int); 31 HS_DTRACE_PROBE_DECL0(hotspot, thread__yield); 32 33 /* 34 NOTE about use of any ctor or function call that can trigger a safepoint/GC: 35 such ctors and calls MUST NOT come between an oop declaration/init and its 36 usage because if objects are move this may cause various memory stomps, bus 37 errors and segfaults. Here is a cookbook for causing so called "naked oop 38 failures": 39 40 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> { 41 JVMWrapper("JVM_GetClassDeclaredFields"); 42 43 // Object address to be held directly in mirror & not visible to GC 44 oop mirror = JNIHandles::resolve_non_null(ofClass); 45 46 // If this ctor can hit a safepoint, moving objects around, then 47 ComplexConstructor foo; 48 49 // Boom! mirror may point to JUNK instead of the intended object 50 (some dereference of mirror) 51 52 // Here's another call that may block for GC, making mirror stale 53 MutexLocker ml(some_lock); 54 55 // And here's an initializer that can result in a stale oop 56 // all in one step. 57 oop o = call_that_can_throw_exception(TRAPS); 58 59 60 The solution is to keep the oop declaration BELOW the ctor or function 61 call that might cause a GC, do another resolve to reassign the oop, or 62 consider use of a Handle instead of an oop so there is immunity from object 63 motion. But note that the "QUICK" entries below do not have a handlemark 64 and thus can only support use of handles passed in. 65 */ 66 67 static void trace_class_resolution_impl(klassOop to_class, TRAPS) { 68 ResourceMark rm; 69 int line_number = -1; 70 const char * source_file = NULL; 71 const char * trace = "explicit"; 72 klassOop caller = NULL; 73 JavaThread* jthread = JavaThread::current(); 74 if (jthread->has_last_Java_frame()) { 75 vframeStream vfst(jthread); 76 77 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames 78 symbolHandle access_controller = oopFactory::new_symbol_handle("java/security/AccessController", CHECK); 79 klassOop access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK); 80 symbolHandle privileged_action = oopFactory::new_symbol_handle("java/security/PrivilegedAction", CHECK); 81 klassOop privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK); 82 83 methodOop last_caller = NULL; 84 85 while (!vfst.at_end()) { 86 methodOop m = vfst.method(); 87 if (!vfst.method()->method_holder()->klass_part()->is_subclass_of(SystemDictionary::ClassLoader_klass())&& 88 !vfst.method()->method_holder()->klass_part()->is_subclass_of(access_controller_klass) && 89 !vfst.method()->method_holder()->klass_part()->is_subclass_of(privileged_action_klass)) { 90 break; 91 } 92 last_caller = m; 93 vfst.next(); 94 } 95 // if this is called from Class.forName0 and that is called from Class.forName, 96 // then print the caller of Class.forName. If this is Class.loadClass, then print 97 // that caller, otherwise keep quiet since this should be picked up elsewhere. 98 bool found_it = false; 99 if (!vfst.at_end() && 100 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() && 101 vfst.method()->name() == vmSymbols::forName0_name()) { 102 vfst.next(); 103 if (!vfst.at_end() && 104 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() && 105 vfst.method()->name() == vmSymbols::forName_name()) { 106 vfst.next(); 107 found_it = true; 108 } 109 } else if (last_caller != NULL && 110 instanceKlass::cast(last_caller->method_holder())->name() == 111 vmSymbols::java_lang_ClassLoader() && 112 (last_caller->name() == vmSymbols::loadClassInternal_name() || 113 last_caller->name() == vmSymbols::loadClass_name())) { 114 found_it = true; 115 } else if (!vfst.at_end()) { 116 if (vfst.method()->is_native()) { 117 // JNI call 118 found_it = true; 119 } 120 } 121 if (found_it && !vfst.at_end()) { 122 // found the caller 123 caller = vfst.method()->method_holder(); 124 line_number = vfst.method()->line_number_from_bci(vfst.bci()); 125 if (line_number == -1) { 126 // show method name if it's a native method 127 trace = vfst.method()->name_and_sig_as_C_string(); 128 } 129 symbolOop s = instanceKlass::cast(caller)->source_file_name(); 130 if (s != NULL) { 131 source_file = s->as_C_string(); 132 } 133 } 134 } 135 if (caller != NULL) { 136 if (to_class != caller) { 137 const char * from = Klass::cast(caller)->external_name(); 138 const char * to = Klass::cast(to_class)->external_name(); 139 // print in a single call to reduce interleaving between threads 140 if (source_file != NULL) { 141 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace); 142 } else { 143 tty->print("RESOLVE %s %s (%s)\n", from, to, trace); 144 } 145 } 146 } 147 } 148 149 void trace_class_resolution(klassOop to_class) { 150 EXCEPTION_MARK; 151 trace_class_resolution_impl(to_class, THREAD); 152 if (HAS_PENDING_EXCEPTION) { 153 CLEAR_PENDING_EXCEPTION; 154 } 155 } 156 157 // Wrapper to trace JVM functions 158 159 #ifdef ASSERT 160 class JVMTraceWrapper : public StackObj { 161 public: 162 JVMTraceWrapper(const char* format, ...) { 163 if (TraceJVMCalls) { 164 va_list ap; 165 va_start(ap, format); 166 tty->print("JVM "); 167 tty->vprint_cr(format, ap); 168 va_end(ap); 169 } 170 } 171 }; 172 173 Histogram* JVMHistogram; 174 volatile jint JVMHistogram_lock = 0; 175 176 class JVMHistogramElement : public HistogramElement { 177 public: 178 JVMHistogramElement(const char* name); 179 }; 180 181 JVMHistogramElement::JVMHistogramElement(const char* elementName) { 182 _name = elementName; 183 uintx count = 0; 184 185 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) { 186 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) { 187 count +=1; 188 if ( (WarnOnStalledSpinLock > 0) 189 && (count % WarnOnStalledSpinLock == 0)) { 190 warning("JVMHistogram_lock seems to be stalled"); 191 } 192 } 193 } 194 195 if(JVMHistogram == NULL) 196 JVMHistogram = new Histogram("JVM Call Counts",100); 197 198 JVMHistogram->add_element(this); 199 Atomic::dec(&JVMHistogram_lock); 200 } 201 202 #define JVMCountWrapper(arg) \ 203 static JVMHistogramElement* e = new JVMHistogramElement(arg); \ 204 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen! 205 206 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1) 207 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2) 208 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3) 209 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4) 210 #else 211 #define JVMWrapper(arg1) 212 #define JVMWrapper2(arg1, arg2) 213 #define JVMWrapper3(arg1, arg2, arg3) 214 #define JVMWrapper4(arg1, arg2, arg3, arg4) 215 #endif 216 217 218 // Interface version ///////////////////////////////////////////////////////////////////// 219 220 221 JVM_LEAF(jint, JVM_GetInterfaceVersion()) 222 return JVM_INTERFACE_VERSION; 223 JVM_END 224 225 226 // java.lang.System ////////////////////////////////////////////////////////////////////// 227 228 229 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored)) 230 JVMWrapper("JVM_CurrentTimeMillis"); 231 return os::javaTimeMillis(); 232 JVM_END 233 234 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored)) 235 JVMWrapper("JVM_NanoTime"); 236 return os::javaTimeNanos(); 237 JVM_END 238 239 240 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos, 241 jobject dst, jint dst_pos, jint length)) 242 JVMWrapper("JVM_ArrayCopy"); 243 // Check if we have null pointers 244 if (src == NULL || dst == NULL) { 245 THROW(vmSymbols::java_lang_NullPointerException()); 246 } 247 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src)); 248 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst)); 249 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop"); 250 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop"); 251 // Do copy 252 Klass::cast(s->klass())->copy_array(s, src_pos, d, dst_pos, length, thread); 253 JVM_END 254 255 256 static void set_property(Handle props, const char* key, const char* value, TRAPS) { 257 JavaValue r(T_OBJECT); 258 // public synchronized Object put(Object key, Object value); 259 HandleMark hm(THREAD); 260 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK); 261 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK); 262 JavaCalls::call_virtual(&r, 263 props, 264 KlassHandle(THREAD, SystemDictionary::Properties_klass()), 265 vmSymbolHandles::put_name(), 266 vmSymbolHandles::object_object_object_signature(), 267 key_str, 268 value_str, 269 THREAD); 270 } 271 272 273 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties)); 274 275 276 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties)) 277 JVMWrapper("JVM_InitProperties"); 278 ResourceMark rm; 279 280 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); 281 282 // System property list includes both user set via -D option and 283 // jvm system specific properties. 284 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { 285 PUTPROP(props, p->key(), p->value()); 286 } 287 288 // Convert the -XX:MaxDirectMemorySize= command line flag 289 // to the sun.nio.MaxDirectMemorySize property. 290 // Do this after setting user properties to prevent people 291 // from setting the value with a -D option, as requested. 292 { 293 char as_chars[256]; 294 jio_snprintf(as_chars, sizeof(as_chars), INTX_FORMAT, MaxDirectMemorySize); 295 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars); 296 } 297 298 // JVM monitoring and management support 299 // Add the sun.management.compiler property for the compiler's name 300 { 301 #undef CSIZE 302 #if defined(_LP64) || defined(_WIN64) 303 #define CSIZE "64-Bit " 304 #else 305 #define CSIZE 306 #endif // 64bit 307 308 #ifdef TIERED 309 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers"; 310 #else 311 #if defined(COMPILER1) 312 const char* compiler_name = "HotSpot " CSIZE "Client Compiler"; 313 #elif defined(COMPILER2) 314 const char* compiler_name = "HotSpot " CSIZE "Server Compiler"; 315 #else 316 const char* compiler_name = ""; 317 #endif // compilers 318 #endif // TIERED 319 320 if (*compiler_name != '\0' && 321 (Arguments::mode() != Arguments::_int)) { 322 PUTPROP(props, "sun.management.compiler", compiler_name); 323 } 324 } 325 326 return properties; 327 JVM_END 328 329 330 // java.lang.Runtime ///////////////////////////////////////////////////////////////////////// 331 332 extern volatile jint vm_created; 333 334 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code)) 335 if (vm_created != 0 && (code == 0)) { 336 // The VM is about to exit. We call back into Java to check whether finalizers should be run 337 Universe::run_finalizers_on_exit(); 338 } 339 before_exit(thread); 340 vm_exit(code); 341 JVM_END 342 343 344 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code)) 345 before_exit(thread); 346 vm_exit(code); 347 JVM_END 348 349 350 JVM_LEAF(void, JVM_OnExit(void (*func)(void))) 351 register_on_exit_function(func); 352 JVM_END 353 354 355 JVM_ENTRY_NO_ENV(void, JVM_GC(void)) 356 JVMWrapper("JVM_GC"); 357 if (!DisableExplicitGC) { 358 Universe::heap()->collect(GCCause::_java_lang_system_gc); 359 } 360 JVM_END 361 362 363 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void)) 364 JVMWrapper("JVM_MaxObjectInspectionAge"); 365 return Universe::heap()->millis_since_last_gc(); 366 JVM_END 367 368 369 JVM_LEAF(void, JVM_TraceInstructions(jboolean on)) 370 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported"); 371 JVM_END 372 373 374 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on)) 375 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported"); 376 JVM_END 377 378 static inline jlong convert_size_t_to_jlong(size_t val) { 379 // In the 64-bit vm, a size_t can overflow a jlong (which is signed). 380 NOT_LP64 (return (jlong)val;) 381 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);) 382 } 383 384 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void)) 385 JVMWrapper("JVM_TotalMemory"); 386 size_t n = Universe::heap()->capacity(); 387 return convert_size_t_to_jlong(n); 388 JVM_END 389 390 391 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void)) 392 JVMWrapper("JVM_FreeMemory"); 393 CollectedHeap* ch = Universe::heap(); 394 size_t n; 395 { 396 MutexLocker x(Heap_lock); 397 n = ch->capacity() - ch->used(); 398 } 399 return convert_size_t_to_jlong(n); 400 JVM_END 401 402 403 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void)) 404 JVMWrapper("JVM_MaxMemory"); 405 size_t n = Universe::heap()->max_capacity(); 406 return convert_size_t_to_jlong(n); 407 JVM_END 408 409 410 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void)) 411 JVMWrapper("JVM_ActiveProcessorCount"); 412 return os::active_processor_count(); 413 JVM_END 414 415 416 417 // java.lang.Throwable ////////////////////////////////////////////////////// 418 419 420 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver)) 421 JVMWrapper("JVM_FillInStackTrace"); 422 Handle exception(thread, JNIHandles::resolve_non_null(receiver)); 423 java_lang_Throwable::fill_in_stack_trace(exception); 424 JVM_END 425 426 427 JVM_ENTRY(void, JVM_PrintStackTrace(JNIEnv *env, jobject receiver, jobject printable)) 428 JVMWrapper("JVM_PrintStackTrace"); 429 // Note: This is no longer used in Merlin, but we still support it for compatibility. 430 oop exception = JNIHandles::resolve_non_null(receiver); 431 oop stream = JNIHandles::resolve_non_null(printable); 432 java_lang_Throwable::print_stack_trace(exception, stream); 433 JVM_END 434 435 436 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable)) 437 JVMWrapper("JVM_GetStackTraceDepth"); 438 oop exception = JNIHandles::resolve(throwable); 439 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD); 440 JVM_END 441 442 443 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index)) 444 JVMWrapper("JVM_GetStackTraceElement"); 445 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC 446 oop exception = JNIHandles::resolve(throwable); 447 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL); 448 return JNIHandles::make_local(env, element); 449 JVM_END 450 451 452 // java.lang.Object /////////////////////////////////////////////// 453 454 455 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle)) 456 JVMWrapper("JVM_IHashCode"); 457 // as implemented in the classic virtual machine; return 0 if object is NULL 458 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ; 459 JVM_END 460 461 462 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms)) 463 JVMWrapper("JVM_MonitorWait"); 464 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 465 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorWait must apply to an object"); 466 JavaThreadInObjectWaitState jtiows(thread, ms != 0); 467 if (JvmtiExport::should_post_monitor_wait()) { 468 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms); 469 } 470 ObjectSynchronizer::wait(obj, ms, CHECK); 471 JVM_END 472 473 474 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle)) 475 JVMWrapper("JVM_MonitorNotify"); 476 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 477 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotify must apply to an object"); 478 ObjectSynchronizer::notify(obj, CHECK); 479 JVM_END 480 481 482 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle)) 483 JVMWrapper("JVM_MonitorNotifyAll"); 484 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 485 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotifyAll must apply to an object"); 486 ObjectSynchronizer::notifyall(obj, CHECK); 487 JVM_END 488 489 490 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle)) 491 JVMWrapper("JVM_Clone"); 492 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 493 const KlassHandle klass (THREAD, obj->klass()); 494 JvmtiVMObjectAllocEventCollector oam; 495 496 #ifdef ASSERT 497 // Just checking that the cloneable flag is set correct 498 if (obj->is_javaArray()) { 499 guarantee(klass->is_cloneable(), "all arrays are cloneable"); 500 } else { 501 guarantee(obj->is_instance(), "should be instanceOop"); 502 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass()); 503 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag"); 504 } 505 #endif 506 507 // Check if class of obj supports the Cloneable interface. 508 // All arrays are considered to be cloneable (See JLS 20.1.5) 509 if (!klass->is_cloneable()) { 510 ResourceMark rm(THREAD); 511 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name()); 512 } 513 514 // Make shallow object copy 515 const int size = obj->size(); 516 oop new_obj = NULL; 517 if (obj->is_javaArray()) { 518 const int length = ((arrayOop)obj())->length(); 519 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL); 520 } else { 521 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL); 522 } 523 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread 524 // is modifying a reference field in the clonee, a non-oop-atomic copy might 525 // be suspended in the middle of copying the pointer and end up with parts 526 // of two different pointers in the field. Subsequent dereferences will crash. 527 // 4846409: an oop-copy of objects with long or double fields or arrays of same 528 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead 529 // of oops. We know objects are aligned on a minimum of an jlong boundary. 530 // The same is true of StubRoutines::object_copy and the various oop_copy 531 // variants, and of the code generated by the inline_native_clone intrinsic. 532 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned"); 533 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj, 534 (size_t)align_object_size(size) / HeapWordsPerLong); 535 // Clear the header 536 new_obj->init_mark(); 537 538 // Store check (mark entire object and let gc sort it out) 539 BarrierSet* bs = Universe::heap()->barrier_set(); 540 assert(bs->has_write_region_opt(), "Barrier set does not have write_region"); 541 bs->write_region(MemRegion((HeapWord*)new_obj, size)); 542 543 // Caution: this involves a java upcall, so the clone should be 544 // "gc-robust" by this stage. 545 if (klass->has_finalizer()) { 546 assert(obj->is_instance(), "should be instanceOop"); 547 new_obj = instanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL); 548 } 549 550 return JNIHandles::make_local(env, oop(new_obj)); 551 JVM_END 552 553 // java.lang.Compiler //////////////////////////////////////////////////// 554 555 // The initial cuts of the HotSpot VM will not support JITs, and all existing 556 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM 557 // functions are all silently ignored unless JVM warnings are printed. 558 559 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls)) 560 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported"); 561 JVM_END 562 563 564 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls)) 565 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported"); 566 return JNI_FALSE; 567 JVM_END 568 569 570 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls)) 571 if (PrintJVMWarnings) warning("JVM_CompileClass not supported"); 572 return JNI_FALSE; 573 JVM_END 574 575 576 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname)) 577 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported"); 578 return JNI_FALSE; 579 JVM_END 580 581 582 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg)) 583 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported"); 584 return NULL; 585 JVM_END 586 587 588 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls)) 589 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported"); 590 JVM_END 591 592 593 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls)) 594 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported"); 595 JVM_END 596 597 598 599 // Error message support ////////////////////////////////////////////////////// 600 601 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len)) 602 JVMWrapper("JVM_GetLastErrorString"); 603 return hpi::lasterror(buf, len); 604 JVM_END 605 606 607 // java.io.File /////////////////////////////////////////////////////////////// 608 609 JVM_LEAF(char*, JVM_NativePath(char* path)) 610 JVMWrapper2("JVM_NativePath (%s)", path); 611 return hpi::native_path(path); 612 JVM_END 613 614 615 // Misc. class handling /////////////////////////////////////////////////////////// 616 617 618 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth)) 619 JVMWrapper("JVM_GetCallerClass"); 620 klassOop k = thread->security_get_caller_class(depth); 621 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); 622 JVM_END 623 624 625 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf)) 626 JVMWrapper("JVM_FindPrimitiveClass"); 627 oop mirror = NULL; 628 BasicType t = name2type(utf); 629 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) { 630 mirror = Universe::java_mirror(t); 631 } 632 if (mirror == NULL) { 633 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf); 634 } else { 635 return (jclass) JNIHandles::make_local(env, mirror); 636 } 637 JVM_END 638 639 640 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls)) 641 JVMWrapper("JVM_ResolveClass"); 642 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented"); 643 JVM_END 644 645 646 // Returns a class loaded by the bootstrap class loader; or null 647 // if not found. ClassNotFoundException is not thrown. 648 // 649 // Rationale behind JVM_FindClassFromBootLoader 650 // a> JVM_FindClassFromClassLoader was never exported in the export tables. 651 // b> because of (a) java.dll has a direct dependecy on the unexported 652 // private symbol "_JVM_FindClassFromClassLoader@20". 653 // c> the launcher cannot use the private symbol as it dynamically opens 654 // the entry point, so if something changes, the launcher will fail 655 // unexpectedly at runtime, it is safest for the launcher to dlopen a 656 // stable exported interface. 657 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its 658 // signature to change from _JVM_FindClassFromClassLoader@20 to 659 // JVM_FindClassFromClassLoader and will not be backward compatible 660 // with older JDKs. 661 // Thus a public/stable exported entry point is the right solution, 662 // public here means public in linker semantics, and is exported only 663 // to the JDK, and is not intended to be a public API. 664 665 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env, 666 const char* name)) 667 JVMWrapper2("JVM_FindClassFromBootLoader %s", name); 668 669 // Java libraries should ensure that name is never null... 670 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) { 671 // It's impossible to create this class; the name cannot fit 672 // into the constant pool. 673 return NULL; 674 } 675 676 symbolHandle h_name = oopFactory::new_symbol_handle(name, CHECK_NULL); 677 klassOop k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL); 678 if (k == NULL) { 679 return NULL; 680 } 681 682 if (TraceClassResolution) { 683 trace_class_resolution(k); 684 } 685 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); 686 JVM_END 687 688 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name, 689 jboolean init, jobject loader, 690 jboolean throwError)) 691 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name, 692 throwError ? "error" : "exception"); 693 // Java libraries should ensure that name is never null... 694 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) { 695 // It's impossible to create this class; the name cannot fit 696 // into the constant pool. 697 if (throwError) { 698 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 699 } else { 700 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name); 701 } 702 } 703 symbolHandle h_name = oopFactory::new_symbol_handle(name, CHECK_NULL); 704 Handle h_loader(THREAD, JNIHandles::resolve(loader)); 705 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, 706 Handle(), throwError, THREAD); 707 708 if (TraceClassResolution && result != NULL) { 709 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result))); 710 } 711 return result; 712 JVM_END 713 714 715 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name, 716 jboolean init, jclass from)) 717 JVMWrapper2("JVM_FindClassFromClass %s", name); 718 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) { 719 // It's impossible to create this class; the name cannot fit 720 // into the constant pool. 721 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 722 } 723 symbolHandle h_name = oopFactory::new_symbol_handle(name, CHECK_NULL); 724 oop from_class_oop = JNIHandles::resolve(from); 725 klassOop from_class = (from_class_oop == NULL) 726 ? (klassOop)NULL 727 : java_lang_Class::as_klassOop(from_class_oop); 728 oop class_loader = NULL; 729 oop protection_domain = NULL; 730 if (from_class != NULL) { 731 class_loader = Klass::cast(from_class)->class_loader(); 732 protection_domain = Klass::cast(from_class)->protection_domain(); 733 } 734 Handle h_loader(THREAD, class_loader); 735 Handle h_prot (THREAD, protection_domain); 736 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, 737 h_prot, true, thread); 738 739 if (TraceClassResolution && result != NULL) { 740 // this function is generally only used for class loading during verification. 741 ResourceMark rm; 742 oop from_mirror = JNIHandles::resolve_non_null(from); 743 klassOop from_class = java_lang_Class::as_klassOop(from_mirror); 744 const char * from_name = Klass::cast(from_class)->external_name(); 745 746 oop mirror = JNIHandles::resolve_non_null(result); 747 klassOop to_class = java_lang_Class::as_klassOop(mirror); 748 const char * to = Klass::cast(to_class)->external_name(); 749 tty->print("RESOLVE %s %s (verification)\n", from_name, to); 750 } 751 752 return result; 753 JVM_END 754 755 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) { 756 if (loader.is_null()) { 757 return; 758 } 759 760 // check whether the current caller thread holds the lock or not. 761 // If not, increment the corresponding counter 762 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) != 763 ObjectSynchronizer::owner_self) { 764 counter->inc(); 765 } 766 } 767 768 // common code for JVM_DefineClass() and JVM_DefineClassWithSource() 769 // and JVM_DefineClassWithSourceCond() 770 static jclass jvm_define_class_common(JNIEnv *env, const char *name, 771 jobject loader, const jbyte *buf, 772 jsize len, jobject pd, const char *source, 773 jboolean verify, TRAPS) { 774 if (source == NULL) source = "__JVM_DefineClass__"; 775 776 assert(THREAD->is_Java_thread(), "must be a JavaThread"); 777 JavaThread* jt = (JavaThread*) THREAD; 778 779 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(), 780 ClassLoader::perf_define_appclass_selftime(), 781 ClassLoader::perf_define_appclasses(), 782 jt->get_thread_stat()->perf_recursion_counts_addr(), 783 jt->get_thread_stat()->perf_timers_addr(), 784 PerfClassTraceTime::DEFINE_CLASS); 785 786 if (UsePerfData) { 787 ClassLoader::perf_app_classfile_bytes_read()->inc(len); 788 } 789 790 // Since exceptions can be thrown, class initialization can take place 791 // if name is NULL no check for class name in .class stream has to be made. 792 symbolHandle class_name; 793 if (name != NULL) { 794 const int str_len = (int)strlen(name); 795 if (str_len > symbolOopDesc::max_length()) { 796 // It's impossible to create this class; the name cannot fit 797 // into the constant pool. 798 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 799 } 800 class_name = oopFactory::new_symbol_handle(name, str_len, CHECK_NULL); 801 } 802 803 ResourceMark rm(THREAD); 804 ClassFileStream st((u1*) buf, len, (char *)source); 805 Handle class_loader (THREAD, JNIHandles::resolve(loader)); 806 if (UsePerfData) { 807 is_lock_held_by_thread(class_loader, 808 ClassLoader::sync_JVMDefineClassLockFreeCounter(), 809 THREAD); 810 } 811 Handle protection_domain (THREAD, JNIHandles::resolve(pd)); 812 klassOop k = SystemDictionary::resolve_from_stream(class_name, class_loader, 813 protection_domain, &st, 814 verify != 0, 815 CHECK_NULL); 816 817 if (TraceClassResolution && k != NULL) { 818 trace_class_resolution(k); 819 } 820 821 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); 822 } 823 824 825 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd)) 826 JVMWrapper2("JVM_DefineClass %s", name); 827 828 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD); 829 JVM_END 830 831 832 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source)) 833 JVMWrapper2("JVM_DefineClassWithSource %s", name); 834 835 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD); 836 JVM_END 837 838 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name, 839 jobject loader, const jbyte *buf, 840 jsize len, jobject pd, 841 const char *source, jboolean verify)) 842 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name); 843 844 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD); 845 JVM_END 846 847 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name)) 848 JVMWrapper("JVM_FindLoadedClass"); 849 ResourceMark rm(THREAD); 850 851 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); 852 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL); 853 854 const char* str = java_lang_String::as_utf8_string(string()); 855 // Sanity check, don't expect null 856 if (str == NULL) return NULL; 857 858 const int str_len = (int)strlen(str); 859 if (str_len > symbolOopDesc::max_length()) { 860 // It's impossible to create this class; the name cannot fit 861 // into the constant pool. 862 return NULL; 863 } 864 symbolHandle klass_name = oopFactory::new_symbol_handle(str, str_len,CHECK_NULL); 865 866 // Security Note: 867 // The Java level wrapper will perform the necessary security check allowing 868 // us to pass the NULL as the initiating class loader. 869 Handle h_loader(THREAD, JNIHandles::resolve(loader)); 870 if (UsePerfData) { 871 is_lock_held_by_thread(h_loader, 872 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(), 873 THREAD); 874 } 875 876 klassOop k = SystemDictionary::find_instance_or_array_klass(klass_name, 877 h_loader, 878 Handle(), 879 CHECK_NULL); 880 881 return (k == NULL) ? NULL : 882 (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); 883 JVM_END 884 885 886 // Reflection support ////////////////////////////////////////////////////////////////////////////// 887 888 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls)) 889 assert (cls != NULL, "illegal class"); 890 JVMWrapper("JVM_GetClassName"); 891 JvmtiVMObjectAllocEventCollector oam; 892 ResourceMark rm(THREAD); 893 const char* name; 894 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 895 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls))); 896 } else { 897 // Consider caching interned string in Klass 898 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); 899 assert(k->is_klass(), "just checking"); 900 name = Klass::cast(k)->external_name(); 901 } 902 oop result = StringTable::intern((char*) name, CHECK_NULL); 903 return (jstring) JNIHandles::make_local(env, result); 904 JVM_END 905 906 907 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls)) 908 JVMWrapper("JVM_GetClassInterfaces"); 909 JvmtiVMObjectAllocEventCollector oam; 910 oop mirror = JNIHandles::resolve_non_null(cls); 911 912 // Special handling for primitive objects 913 if (java_lang_Class::is_primitive(mirror)) { 914 // Primitive objects does not have any interfaces 915 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 916 return (jobjectArray) JNIHandles::make_local(env, r); 917 } 918 919 KlassHandle klass(thread, java_lang_Class::as_klassOop(mirror)); 920 // Figure size of result array 921 int size; 922 if (klass->oop_is_instance()) { 923 size = instanceKlass::cast(klass())->local_interfaces()->length(); 924 } else { 925 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass"); 926 size = 2; 927 } 928 929 // Allocate result array 930 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL); 931 objArrayHandle result (THREAD, r); 932 // Fill in result 933 if (klass->oop_is_instance()) { 934 // Regular instance klass, fill in all local interfaces 935 for (int index = 0; index < size; index++) { 936 klassOop k = klassOop(instanceKlass::cast(klass())->local_interfaces()->obj_at(index)); 937 result->obj_at_put(index, Klass::cast(k)->java_mirror()); 938 } 939 } else { 940 // All arrays implement java.lang.Cloneable and java.io.Serializable 941 result->obj_at_put(0, Klass::cast(SystemDictionary::Cloneable_klass())->java_mirror()); 942 result->obj_at_put(1, Klass::cast(SystemDictionary::Serializable_klass())->java_mirror()); 943 } 944 return (jobjectArray) JNIHandles::make_local(env, result()); 945 JVM_END 946 947 948 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls)) 949 JVMWrapper("JVM_GetClassLoader"); 950 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 951 return NULL; 952 } 953 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 954 oop loader = Klass::cast(k)->class_loader(); 955 return JNIHandles::make_local(env, loader); 956 JVM_END 957 958 959 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls)) 960 JVMWrapper("JVM_IsInterface"); 961 oop mirror = JNIHandles::resolve_non_null(cls); 962 if (java_lang_Class::is_primitive(mirror)) { 963 return JNI_FALSE; 964 } 965 klassOop k = java_lang_Class::as_klassOop(mirror); 966 jboolean result = Klass::cast(k)->is_interface(); 967 assert(!result || Klass::cast(k)->oop_is_instance(), 968 "all interfaces are instance types"); 969 // The compiler intrinsic for isInterface tests the 970 // Klass::_access_flags bits in the same way. 971 return result; 972 JVM_END 973 974 975 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls)) 976 JVMWrapper("JVM_GetClassSigners"); 977 JvmtiVMObjectAllocEventCollector oam; 978 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 979 // There are no signers for primitive types 980 return NULL; 981 } 982 983 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 984 objArrayOop signers = NULL; 985 if (Klass::cast(k)->oop_is_instance()) { 986 signers = instanceKlass::cast(k)->signers(); 987 } 988 989 // If there are no signers set in the class, or if the class 990 // is an array, return NULL. 991 if (signers == NULL) return NULL; 992 993 // copy of the signers array 994 klassOop element = objArrayKlass::cast(signers->klass())->element_klass(); 995 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL); 996 for (int index = 0; index < signers->length(); index++) { 997 signers_copy->obj_at_put(index, signers->obj_at(index)); 998 } 999 1000 // return the copy 1001 return (jobjectArray) JNIHandles::make_local(env, signers_copy); 1002 JVM_END 1003 1004 1005 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers)) 1006 JVMWrapper("JVM_SetClassSigners"); 1007 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1008 // This call is ignored for primitive types and arrays. 1009 // Signers are only set once, ClassLoader.java, and thus shouldn't 1010 // be called with an array. Only the bootstrap loader creates arrays. 1011 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 1012 if (Klass::cast(k)->oop_is_instance()) { 1013 instanceKlass::cast(k)->set_signers(objArrayOop(JNIHandles::resolve(signers))); 1014 } 1015 } 1016 JVM_END 1017 1018 1019 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls)) 1020 JVMWrapper("JVM_GetProtectionDomain"); 1021 if (JNIHandles::resolve(cls) == NULL) { 1022 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); 1023 } 1024 1025 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1026 // Primitive types does not have a protection domain. 1027 return NULL; 1028 } 1029 1030 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); 1031 return (jobject) JNIHandles::make_local(env, Klass::cast(k)->protection_domain()); 1032 JVM_END 1033 1034 1035 // Obsolete since 1.2 (Class.setProtectionDomain removed), although 1036 // still defined in core libraries as of 1.5. 1037 JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain)) 1038 JVMWrapper("JVM_SetProtectionDomain"); 1039 if (JNIHandles::resolve(cls) == NULL) { 1040 THROW(vmSymbols::java_lang_NullPointerException()); 1041 } 1042 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1043 // Call is ignored for primitive types 1044 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); 1045 1046 // cls won't be an array, as this called only from ClassLoader.defineClass 1047 if (Klass::cast(k)->oop_is_instance()) { 1048 oop pd = JNIHandles::resolve(protection_domain); 1049 assert(pd == NULL || pd->is_oop(), "just checking"); 1050 instanceKlass::cast(k)->set_protection_domain(pd); 1051 } 1052 } 1053 JVM_END 1054 1055 1056 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException)) 1057 JVMWrapper("JVM_DoPrivileged"); 1058 1059 if (action == NULL) { 1060 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action"); 1061 } 1062 1063 // Stack allocated list of privileged stack elements 1064 PrivilegedElement pi; 1065 1066 // Check that action object understands "Object run()" 1067 Handle object (THREAD, JNIHandles::resolve(action)); 1068 1069 // get run() method 1070 methodOop m_oop = Klass::cast(object->klass())->uncached_lookup_method( 1071 vmSymbols::run_method_name(), 1072 vmSymbols::void_object_signature()); 1073 methodHandle m (THREAD, m_oop); 1074 if (m.is_null() || !m->is_method() || !methodOop(m())->is_public() || methodOop(m())->is_static()) { 1075 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method"); 1076 } 1077 1078 // Compute the frame initiating the do privileged operation and setup the privileged stack 1079 vframeStream vfst(thread); 1080 vfst.security_get_caller_frame(1); 1081 1082 if (!vfst.at_end()) { 1083 pi.initialize(&vfst, JNIHandles::resolve(context), thread->privileged_stack_top(), CHECK_NULL); 1084 thread->set_privileged_stack_top(&pi); 1085 } 1086 1087 1088 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type 1089 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction 1090 Handle pending_exception; 1091 JavaValue result(T_OBJECT); 1092 JavaCallArguments args(object); 1093 JavaCalls::call(&result, m, &args, THREAD); 1094 1095 // done with action, remove ourselves from the list 1096 if (!vfst.at_end()) { 1097 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element"); 1098 thread->set_privileged_stack_top(thread->privileged_stack_top()->next()); 1099 } 1100 1101 if (HAS_PENDING_EXCEPTION) { 1102 pending_exception = Handle(THREAD, PENDING_EXCEPTION); 1103 CLEAR_PENDING_EXCEPTION; 1104 1105 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) && 1106 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) { 1107 // Throw a java.security.PrivilegedActionException(Exception e) exception 1108 JavaCallArguments args(pending_exception); 1109 THROW_ARG_0(vmSymbolHandles::java_security_PrivilegedActionException(), 1110 vmSymbolHandles::exception_void_signature(), 1111 &args); 1112 } 1113 } 1114 1115 if (pending_exception.not_null()) THROW_OOP_0(pending_exception()); 1116 return JNIHandles::make_local(env, (oop) result.get_jobject()); 1117 JVM_END 1118 1119 1120 // Returns the inherited_access_control_context field of the running thread. 1121 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls)) 1122 JVMWrapper("JVM_GetInheritedAccessControlContext"); 1123 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj()); 1124 return JNIHandles::make_local(env, result); 1125 JVM_END 1126 1127 class RegisterArrayForGC { 1128 private: 1129 JavaThread *_thread; 1130 public: 1131 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) { 1132 _thread = thread; 1133 _thread->register_array_for_gc(array); 1134 } 1135 1136 ~RegisterArrayForGC() { 1137 _thread->register_array_for_gc(NULL); 1138 } 1139 }; 1140 1141 1142 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls)) 1143 JVMWrapper("JVM_GetStackAccessControlContext"); 1144 if (!UsePrivilegedStack) return NULL; 1145 1146 ResourceMark rm(THREAD); 1147 GrowableArray<oop>* local_array = new GrowableArray<oop>(12); 1148 JvmtiVMObjectAllocEventCollector oam; 1149 1150 // count the protection domains on the execution stack. We collapse 1151 // duplicate consecutive protection domains into a single one, as 1152 // well as stopping when we hit a privileged frame. 1153 1154 // Use vframeStream to iterate through Java frames 1155 vframeStream vfst(thread); 1156 1157 oop previous_protection_domain = NULL; 1158 Handle privileged_context(thread, NULL); 1159 bool is_privileged = false; 1160 oop protection_domain = NULL; 1161 1162 for(; !vfst.at_end(); vfst.next()) { 1163 // get method of frame 1164 methodOop method = vfst.method(); 1165 intptr_t* frame_id = vfst.frame_id(); 1166 1167 // check the privileged frames to see if we have a match 1168 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) { 1169 // this frame is privileged 1170 is_privileged = true; 1171 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context()); 1172 protection_domain = thread->privileged_stack_top()->protection_domain(); 1173 } else { 1174 protection_domain = instanceKlass::cast(method->method_holder())->protection_domain(); 1175 } 1176 1177 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) { 1178 local_array->push(protection_domain); 1179 previous_protection_domain = protection_domain; 1180 } 1181 1182 if (is_privileged) break; 1183 } 1184 1185 1186 // either all the domains on the stack were system domains, or 1187 // we had a privileged system domain 1188 if (local_array->is_empty()) { 1189 if (is_privileged && privileged_context.is_null()) return NULL; 1190 1191 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL); 1192 return JNIHandles::make_local(env, result); 1193 } 1194 1195 // the resource area must be registered in case of a gc 1196 RegisterArrayForGC ragc(thread, local_array); 1197 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(), 1198 local_array->length(), CHECK_NULL); 1199 objArrayHandle h_context(thread, context); 1200 for (int index = 0; index < local_array->length(); index++) { 1201 h_context->obj_at_put(index, local_array->at(index)); 1202 } 1203 1204 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL); 1205 1206 return JNIHandles::make_local(env, result); 1207 JVM_END 1208 1209 1210 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls)) 1211 JVMWrapper("JVM_IsArrayClass"); 1212 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 1213 return (k != NULL) && Klass::cast(k)->oop_is_javaArray() ? true : false; 1214 JVM_END 1215 1216 1217 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls)) 1218 JVMWrapper("JVM_IsPrimitiveClass"); 1219 oop mirror = JNIHandles::resolve_non_null(cls); 1220 return (jboolean) java_lang_Class::is_primitive(mirror); 1221 JVM_END 1222 1223 1224 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls)) 1225 JVMWrapper("JVM_GetComponentType"); 1226 oop mirror = JNIHandles::resolve_non_null(cls); 1227 oop result = Reflection::array_component_type(mirror, CHECK_NULL); 1228 return (jclass) JNIHandles::make_local(env, result); 1229 JVM_END 1230 1231 1232 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls)) 1233 JVMWrapper("JVM_GetClassModifiers"); 1234 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1235 // Primitive type 1236 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 1237 } 1238 1239 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls))); 1240 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0)); 1241 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK"); 1242 return k->modifier_flags(); 1243 JVM_END 1244 1245 1246 // Inner class reflection /////////////////////////////////////////////////////////////////////////////// 1247 1248 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass)) 1249 const int inner_class_info_index = 0; 1250 const int outer_class_info_index = 1; 1251 1252 JvmtiVMObjectAllocEventCollector oam; 1253 // ofClass is a reference to a java_lang_Class object. The mirror object 1254 // of an instanceKlass 1255 1256 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1257 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) { 1258 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1259 return (jobjectArray)JNIHandles::make_local(env, result); 1260 } 1261 1262 instanceKlassHandle k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); 1263 1264 if (k->inner_classes()->length() == 0) { 1265 // Neither an inner nor outer class 1266 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1267 return (jobjectArray)JNIHandles::make_local(env, result); 1268 } 1269 1270 // find inner class info 1271 typeArrayHandle icls(thread, k->inner_classes()); 1272 constantPoolHandle cp(thread, k->constants()); 1273 int length = icls->length(); 1274 1275 // Allocate temp. result array 1276 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL); 1277 objArrayHandle result (THREAD, r); 1278 int members = 0; 1279 1280 for(int i = 0; i < length; i += 4) { 1281 int ioff = icls->ushort_at(i + inner_class_info_index); 1282 int ooff = icls->ushort_at(i + outer_class_info_index); 1283 1284 if (ioff != 0 && ooff != 0) { 1285 // Check to see if the name matches the class we're looking for 1286 // before attempting to find the class. 1287 if (cp->klass_name_at_matches(k, ooff)) { 1288 klassOop outer_klass = cp->klass_at(ooff, CHECK_NULL); 1289 if (outer_klass == k()) { 1290 klassOop ik = cp->klass_at(ioff, CHECK_NULL); 1291 instanceKlassHandle inner_klass (THREAD, ik); 1292 1293 // Throws an exception if outer klass has not declared k as 1294 // an inner klass 1295 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL); 1296 1297 result->obj_at_put(members, inner_klass->java_mirror()); 1298 members++; 1299 } 1300 } 1301 } 1302 } 1303 1304 if (members != length) { 1305 // Return array of right length 1306 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL); 1307 for(int i = 0; i < members; i++) { 1308 res->obj_at_put(i, result->obj_at(i)); 1309 } 1310 return (jobjectArray)JNIHandles::make_local(env, res); 1311 } 1312 1313 return (jobjectArray)JNIHandles::make_local(env, result()); 1314 JVM_END 1315 1316 1317 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass)) 1318 { 1319 // ofClass is a reference to a java_lang_Class object. 1320 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1321 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) { 1322 return NULL; 1323 } 1324 1325 bool inner_is_member = false; 1326 klassOop outer_klass 1327 = instanceKlass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)) 1328 )->compute_enclosing_class(&inner_is_member, CHECK_NULL); 1329 if (outer_klass == NULL) return NULL; // already a top-level class 1330 if (!inner_is_member) return NULL; // an anonymous class (inside a method) 1331 return (jclass) JNIHandles::make_local(env, Klass::cast(outer_klass)->java_mirror()); 1332 } 1333 JVM_END 1334 1335 // should be in instanceKlass.cpp, but is here for historical reasons 1336 klassOop instanceKlass::compute_enclosing_class_impl(instanceKlassHandle k, 1337 bool* inner_is_member, 1338 TRAPS) { 1339 Thread* thread = THREAD; 1340 const int inner_class_info_index = inner_class_inner_class_info_offset; 1341 const int outer_class_info_index = inner_class_outer_class_info_offset; 1342 1343 if (k->inner_classes()->length() == 0) { 1344 // No inner class info => no declaring class 1345 return NULL; 1346 } 1347 1348 typeArrayHandle i_icls(thread, k->inner_classes()); 1349 constantPoolHandle i_cp(thread, k->constants()); 1350 int i_length = i_icls->length(); 1351 1352 bool found = false; 1353 klassOop ok; 1354 instanceKlassHandle outer_klass; 1355 *inner_is_member = false; 1356 1357 // Find inner_klass attribute 1358 for (int i = 0; i < i_length && !found; i += inner_class_next_offset) { 1359 int ioff = i_icls->ushort_at(i + inner_class_info_index); 1360 int ooff = i_icls->ushort_at(i + outer_class_info_index); 1361 int noff = i_icls->ushort_at(i + inner_class_inner_name_offset); 1362 if (ioff != 0) { 1363 // Check to see if the name matches the class we're looking for 1364 // before attempting to find the class. 1365 if (i_cp->klass_name_at_matches(k, ioff)) { 1366 klassOop inner_klass = i_cp->klass_at(ioff, CHECK_NULL); 1367 found = (k() == inner_klass); 1368 if (found && ooff != 0) { 1369 ok = i_cp->klass_at(ooff, CHECK_NULL); 1370 outer_klass = instanceKlassHandle(thread, ok); 1371 *inner_is_member = true; 1372 } 1373 } 1374 } 1375 } 1376 1377 if (found && outer_klass.is_null()) { 1378 // It may be anonymous; try for that. 1379 int encl_method_class_idx = k->enclosing_method_class_index(); 1380 if (encl_method_class_idx != 0) { 1381 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL); 1382 outer_klass = instanceKlassHandle(thread, ok); 1383 *inner_is_member = false; 1384 } 1385 } 1386 1387 // If no inner class attribute found for this class. 1388 if (outer_klass.is_null()) return NULL; 1389 1390 // Throws an exception if outer klass has not declared k as an inner klass 1391 // We need evidence that each klass knows about the other, or else 1392 // the system could allow a spoof of an inner class to gain access rights. 1393 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL); 1394 return outer_klass(); 1395 } 1396 1397 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls)) 1398 assert (cls != NULL, "illegal class"); 1399 JVMWrapper("JVM_GetClassSignature"); 1400 JvmtiVMObjectAllocEventCollector oam; 1401 ResourceMark rm(THREAD); 1402 // Return null for arrays and primatives 1403 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1404 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); 1405 if (Klass::cast(k)->oop_is_instance()) { 1406 symbolHandle sym = symbolHandle(THREAD, instanceKlass::cast(k)->generic_signature()); 1407 if (sym.is_null()) return NULL; 1408 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 1409 return (jstring) JNIHandles::make_local(env, str()); 1410 } 1411 } 1412 return NULL; 1413 JVM_END 1414 1415 1416 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls)) 1417 assert (cls != NULL, "illegal class"); 1418 JVMWrapper("JVM_GetClassAnnotations"); 1419 ResourceMark rm(THREAD); 1420 // Return null for arrays and primitives 1421 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1422 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); 1423 if (Klass::cast(k)->oop_is_instance()) { 1424 return (jbyteArray) JNIHandles::make_local(env, 1425 instanceKlass::cast(k)->class_annotations()); 1426 } 1427 } 1428 return NULL; 1429 JVM_END 1430 1431 1432 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field)) 1433 assert(field != NULL, "illegal field"); 1434 JVMWrapper("JVM_GetFieldAnnotations"); 1435 1436 // some of this code was adapted from from jni_FromReflectedField 1437 1438 // field is a handle to a java.lang.reflect.Field object 1439 oop reflected = JNIHandles::resolve_non_null(field); 1440 oop mirror = java_lang_reflect_Field::clazz(reflected); 1441 klassOop k = java_lang_Class::as_klassOop(mirror); 1442 int slot = java_lang_reflect_Field::slot(reflected); 1443 int modifiers = java_lang_reflect_Field::modifiers(reflected); 1444 1445 fieldDescriptor fd; 1446 KlassHandle kh(THREAD, k); 1447 intptr_t offset = instanceKlass::cast(kh())->offset_from_fields(slot); 1448 1449 if (modifiers & JVM_ACC_STATIC) { 1450 // for static fields we only look in the current class 1451 if (!instanceKlass::cast(kh())->find_local_field_from_offset(offset, 1452 true, &fd)) { 1453 assert(false, "cannot find static field"); 1454 return NULL; // robustness 1455 } 1456 } else { 1457 // for instance fields we start with the current class and work 1458 // our way up through the superclass chain 1459 if (!instanceKlass::cast(kh())->find_field_from_offset(offset, false, 1460 &fd)) { 1461 assert(false, "cannot find instance field"); 1462 return NULL; // robustness 1463 } 1464 } 1465 1466 return (jbyteArray) JNIHandles::make_local(env, fd.annotations()); 1467 JVM_END 1468 1469 1470 static methodOop jvm_get_method_common(jobject method, TRAPS) { 1471 // some of this code was adapted from from jni_FromReflectedMethod 1472 1473 oop reflected = JNIHandles::resolve_non_null(method); 1474 oop mirror = NULL; 1475 int slot = 0; 1476 1477 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 1478 mirror = java_lang_reflect_Constructor::clazz(reflected); 1479 slot = java_lang_reflect_Constructor::slot(reflected); 1480 } else { 1481 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), 1482 "wrong type"); 1483 mirror = java_lang_reflect_Method::clazz(reflected); 1484 slot = java_lang_reflect_Method::slot(reflected); 1485 } 1486 klassOop k = java_lang_Class::as_klassOop(mirror); 1487 1488 KlassHandle kh(THREAD, k); 1489 methodOop m = instanceKlass::cast(kh())->method_with_idnum(slot); 1490 if (m == NULL) { 1491 assert(false, "cannot find method"); 1492 return NULL; // robustness 1493 } 1494 1495 return m; 1496 } 1497 1498 1499 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method)) 1500 JVMWrapper("JVM_GetMethodAnnotations"); 1501 1502 // method is a handle to a java.lang.reflect.Method object 1503 methodOop m = jvm_get_method_common(method, CHECK_NULL); 1504 return (jbyteArray) JNIHandles::make_local(env, m->annotations()); 1505 JVM_END 1506 1507 1508 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method)) 1509 JVMWrapper("JVM_GetMethodDefaultAnnotationValue"); 1510 1511 // method is a handle to a java.lang.reflect.Method object 1512 methodOop m = jvm_get_method_common(method, CHECK_NULL); 1513 return (jbyteArray) JNIHandles::make_local(env, m->annotation_default()); 1514 JVM_END 1515 1516 1517 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method)) 1518 JVMWrapper("JVM_GetMethodParameterAnnotations"); 1519 1520 // method is a handle to a java.lang.reflect.Method object 1521 methodOop m = jvm_get_method_common(method, CHECK_NULL); 1522 return (jbyteArray) JNIHandles::make_local(env, m->parameter_annotations()); 1523 JVM_END 1524 1525 1526 // New (JDK 1.4) reflection implementation ///////////////////////////////////// 1527 1528 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1529 { 1530 JVMWrapper("JVM_GetClassDeclaredFields"); 1531 JvmtiVMObjectAllocEventCollector oam; 1532 1533 // Exclude primitive types and array types 1534 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1535 Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) { 1536 // Return empty array 1537 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL); 1538 return (jobjectArray) JNIHandles::make_local(env, res); 1539 } 1540 1541 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); 1542 constantPoolHandle cp(THREAD, k->constants()); 1543 1544 // Ensure class is linked 1545 k->link_class(CHECK_NULL); 1546 1547 typeArrayHandle fields(THREAD, k->fields()); 1548 int fields_len = fields->length(); 1549 1550 // 4496456 We need to filter out java.lang.Throwable.backtrace 1551 bool skip_backtrace = false; 1552 1553 // Allocate result 1554 int num_fields; 1555 1556 if (publicOnly) { 1557 num_fields = 0; 1558 for (int i = 0, j = 0; i < fields_len; i += instanceKlass::next_offset, j++) { 1559 int mods = fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS; 1560 if (mods & JVM_ACC_PUBLIC) ++num_fields; 1561 } 1562 } else { 1563 num_fields = fields_len / instanceKlass::next_offset; 1564 1565 if (k() == SystemDictionary::Throwable_klass()) { 1566 num_fields--; 1567 skip_backtrace = true; 1568 } 1569 } 1570 1571 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL); 1572 objArrayHandle result (THREAD, r); 1573 1574 int out_idx = 0; 1575 fieldDescriptor fd; 1576 for (int i = 0; i < fields_len; i += instanceKlass::next_offset) { 1577 if (skip_backtrace) { 1578 // 4496456 skip java.lang.Throwable.backtrace 1579 int offset = k->offset_from_fields(i); 1580 if (offset == java_lang_Throwable::get_backtrace_offset()) continue; 1581 } 1582 1583 int mods = fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS; 1584 if (!publicOnly || (mods & JVM_ACC_PUBLIC)) { 1585 fd.initialize(k(), i); 1586 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL); 1587 result->obj_at_put(out_idx, field); 1588 ++out_idx; 1589 } 1590 } 1591 assert(out_idx == num_fields, "just checking"); 1592 return (jobjectArray) JNIHandles::make_local(env, result()); 1593 } 1594 JVM_END 1595 1596 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1597 { 1598 JVMWrapper("JVM_GetClassDeclaredMethods"); 1599 JvmtiVMObjectAllocEventCollector oam; 1600 1601 // Exclude primitive types and array types 1602 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) 1603 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) { 1604 // Return empty array 1605 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), 0, CHECK_NULL); 1606 return (jobjectArray) JNIHandles::make_local(env, res); 1607 } 1608 1609 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); 1610 1611 // Ensure class is linked 1612 k->link_class(CHECK_NULL); 1613 1614 objArrayHandle methods (THREAD, k->methods()); 1615 int methods_length = methods->length(); 1616 int num_methods = 0; 1617 1618 int i; 1619 for (i = 0; i < methods_length; i++) { 1620 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); 1621 if (!method->is_initializer()) { 1622 if (!publicOnly || method->is_public()) { 1623 ++num_methods; 1624 } 1625 } 1626 } 1627 1628 // Allocate result 1629 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), num_methods, CHECK_NULL); 1630 objArrayHandle result (THREAD, r); 1631 1632 int out_idx = 0; 1633 for (i = 0; i < methods_length; i++) { 1634 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); 1635 if (!method->is_initializer()) { 1636 if (!publicOnly || method->is_public()) { 1637 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL); 1638 result->obj_at_put(out_idx, m); 1639 ++out_idx; 1640 } 1641 } 1642 } 1643 assert(out_idx == num_methods, "just checking"); 1644 return (jobjectArray) JNIHandles::make_local(env, result()); 1645 } 1646 JVM_END 1647 1648 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1649 { 1650 JVMWrapper("JVM_GetClassDeclaredConstructors"); 1651 JvmtiVMObjectAllocEventCollector oam; 1652 1653 // Exclude primitive types and array types 1654 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) 1655 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) { 1656 // Return empty array 1657 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0 , CHECK_NULL); 1658 return (jobjectArray) JNIHandles::make_local(env, res); 1659 } 1660 1661 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); 1662 1663 // Ensure class is linked 1664 k->link_class(CHECK_NULL); 1665 1666 objArrayHandle methods (THREAD, k->methods()); 1667 int methods_length = methods->length(); 1668 int num_constructors = 0; 1669 1670 int i; 1671 for (i = 0; i < methods_length; i++) { 1672 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); 1673 if (method->is_initializer() && !method->is_static()) { 1674 if (!publicOnly || method->is_public()) { 1675 ++num_constructors; 1676 } 1677 } 1678 } 1679 1680 // Allocate result 1681 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), num_constructors, CHECK_NULL); 1682 objArrayHandle result(THREAD, r); 1683 1684 int out_idx = 0; 1685 for (i = 0; i < methods_length; i++) { 1686 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); 1687 if (method->is_initializer() && !method->is_static()) { 1688 if (!publicOnly || method->is_public()) { 1689 oop m = Reflection::new_constructor(method, CHECK_NULL); 1690 result->obj_at_put(out_idx, m); 1691 ++out_idx; 1692 } 1693 } 1694 } 1695 assert(out_idx == num_constructors, "just checking"); 1696 return (jobjectArray) JNIHandles::make_local(env, result()); 1697 } 1698 JVM_END 1699 1700 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls)) 1701 { 1702 JVMWrapper("JVM_GetClassAccessFlags"); 1703 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1704 // Primitive type 1705 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 1706 } 1707 1708 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls))); 1709 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS; 1710 } 1711 JVM_END 1712 1713 1714 // Constant pool access ////////////////////////////////////////////////////////// 1715 1716 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls)) 1717 { 1718 JVMWrapper("JVM_GetClassConstantPool"); 1719 JvmtiVMObjectAllocEventCollector oam; 1720 1721 // Return null for primitives and arrays 1722 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1723 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 1724 if (Klass::cast(k)->oop_is_instance()) { 1725 instanceKlassHandle k_h(THREAD, k); 1726 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL); 1727 sun_reflect_ConstantPool::set_cp_oop(jcp(), k_h->constants()); 1728 return JNIHandles::make_local(jcp()); 1729 } 1730 } 1731 return NULL; 1732 } 1733 JVM_END 1734 1735 1736 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject unused, jobject jcpool)) 1737 { 1738 JVMWrapper("JVM_ConstantPoolGetSize"); 1739 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1740 return cp->length(); 1741 } 1742 JVM_END 1743 1744 1745 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) { 1746 if (!cp->is_within_bounds(index)) { 1747 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds"); 1748 } 1749 } 1750 1751 1752 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1753 { 1754 JVMWrapper("JVM_ConstantPoolGetClassAt"); 1755 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1756 bounds_check(cp, index, CHECK_NULL); 1757 constantTag tag = cp->tag_at(index); 1758 if (!tag.is_klass() && !tag.is_unresolved_klass()) { 1759 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1760 } 1761 klassOop k = cp->klass_at(index, CHECK_NULL); 1762 return (jclass) JNIHandles::make_local(k->klass_part()->java_mirror()); 1763 } 1764 JVM_END 1765 1766 1767 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1768 { 1769 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded"); 1770 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1771 bounds_check(cp, index, CHECK_NULL); 1772 constantTag tag = cp->tag_at(index); 1773 if (!tag.is_klass() && !tag.is_unresolved_klass()) { 1774 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1775 } 1776 klassOop k = constantPoolOopDesc::klass_at_if_loaded(cp, index); 1777 if (k == NULL) return NULL; 1778 return (jclass) JNIHandles::make_local(k->klass_part()->java_mirror()); 1779 } 1780 JVM_END 1781 1782 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { 1783 constantTag tag = cp->tag_at(index); 1784 if (!tag.is_method() && !tag.is_interface_method()) { 1785 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1786 } 1787 int klass_ref = cp->uncached_klass_ref_index_at(index); 1788 klassOop k_o; 1789 if (force_resolution) { 1790 k_o = cp->klass_at(klass_ref, CHECK_NULL); 1791 } else { 1792 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref); 1793 if (k_o == NULL) return NULL; 1794 } 1795 instanceKlassHandle k(THREAD, k_o); 1796 symbolOop name = cp->uncached_name_ref_at(index); 1797 symbolOop sig = cp->uncached_signature_ref_at(index); 1798 methodHandle m (THREAD, k->find_method(name, sig)); 1799 if (m.is_null()) { 1800 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class"); 1801 } 1802 oop method; 1803 if (!m->is_initializer() || m->is_static()) { 1804 method = Reflection::new_method(m, true, true, CHECK_NULL); 1805 } else { 1806 method = Reflection::new_constructor(m, CHECK_NULL); 1807 } 1808 return JNIHandles::make_local(method); 1809 } 1810 1811 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1812 { 1813 JVMWrapper("JVM_ConstantPoolGetMethodAt"); 1814 JvmtiVMObjectAllocEventCollector oam; 1815 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1816 bounds_check(cp, index, CHECK_NULL); 1817 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL); 1818 return res; 1819 } 1820 JVM_END 1821 1822 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1823 { 1824 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded"); 1825 JvmtiVMObjectAllocEventCollector oam; 1826 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1827 bounds_check(cp, index, CHECK_NULL); 1828 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL); 1829 return res; 1830 } 1831 JVM_END 1832 1833 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { 1834 constantTag tag = cp->tag_at(index); 1835 if (!tag.is_field()) { 1836 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1837 } 1838 int klass_ref = cp->uncached_klass_ref_index_at(index); 1839 klassOop k_o; 1840 if (force_resolution) { 1841 k_o = cp->klass_at(klass_ref, CHECK_NULL); 1842 } else { 1843 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref); 1844 if (k_o == NULL) return NULL; 1845 } 1846 instanceKlassHandle k(THREAD, k_o); 1847 symbolOop name = cp->uncached_name_ref_at(index); 1848 symbolOop sig = cp->uncached_signature_ref_at(index); 1849 fieldDescriptor fd; 1850 klassOop target_klass = k->find_field(name, sig, &fd); 1851 if (target_klass == NULL) { 1852 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class"); 1853 } 1854 oop field = Reflection::new_field(&fd, true, CHECK_NULL); 1855 return JNIHandles::make_local(field); 1856 } 1857 1858 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1859 { 1860 JVMWrapper("JVM_ConstantPoolGetFieldAt"); 1861 JvmtiVMObjectAllocEventCollector oam; 1862 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1863 bounds_check(cp, index, CHECK_NULL); 1864 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL); 1865 return res; 1866 } 1867 JVM_END 1868 1869 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1870 { 1871 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded"); 1872 JvmtiVMObjectAllocEventCollector oam; 1873 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1874 bounds_check(cp, index, CHECK_NULL); 1875 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL); 1876 return res; 1877 } 1878 JVM_END 1879 1880 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1881 { 1882 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt"); 1883 JvmtiVMObjectAllocEventCollector oam; 1884 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1885 bounds_check(cp, index, CHECK_NULL); 1886 constantTag tag = cp->tag_at(index); 1887 if (!tag.is_field_or_method()) { 1888 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1889 } 1890 int klass_ref = cp->uncached_klass_ref_index_at(index); 1891 symbolHandle klass_name (THREAD, cp->klass_name_at(klass_ref)); 1892 symbolHandle member_name(THREAD, cp->uncached_name_ref_at(index)); 1893 symbolHandle member_sig (THREAD, cp->uncached_signature_ref_at(index)); 1894 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL); 1895 objArrayHandle dest(THREAD, dest_o); 1896 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL); 1897 dest->obj_at_put(0, str()); 1898 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL); 1899 dest->obj_at_put(1, str()); 1900 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL); 1901 dest->obj_at_put(2, str()); 1902 return (jobjectArray) JNIHandles::make_local(dest()); 1903 } 1904 JVM_END 1905 1906 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1907 { 1908 JVMWrapper("JVM_ConstantPoolGetIntAt"); 1909 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1910 bounds_check(cp, index, CHECK_0); 1911 constantTag tag = cp->tag_at(index); 1912 if (!tag.is_int()) { 1913 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1914 } 1915 return cp->int_at(index); 1916 } 1917 JVM_END 1918 1919 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1920 { 1921 JVMWrapper("JVM_ConstantPoolGetLongAt"); 1922 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1923 bounds_check(cp, index, CHECK_(0L)); 1924 constantTag tag = cp->tag_at(index); 1925 if (!tag.is_long()) { 1926 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1927 } 1928 return cp->long_at(index); 1929 } 1930 JVM_END 1931 1932 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1933 { 1934 JVMWrapper("JVM_ConstantPoolGetFloatAt"); 1935 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1936 bounds_check(cp, index, CHECK_(0.0f)); 1937 constantTag tag = cp->tag_at(index); 1938 if (!tag.is_float()) { 1939 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1940 } 1941 return cp->float_at(index); 1942 } 1943 JVM_END 1944 1945 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1946 { 1947 JVMWrapper("JVM_ConstantPoolGetDoubleAt"); 1948 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1949 bounds_check(cp, index, CHECK_(0.0)); 1950 constantTag tag = cp->tag_at(index); 1951 if (!tag.is_double()) { 1952 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1953 } 1954 return cp->double_at(index); 1955 } 1956 JVM_END 1957 1958 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1959 { 1960 JVMWrapper("JVM_ConstantPoolGetStringAt"); 1961 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1962 bounds_check(cp, index, CHECK_NULL); 1963 constantTag tag = cp->tag_at(index); 1964 if (!tag.is_string() && !tag.is_unresolved_string()) { 1965 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1966 } 1967 oop str = cp->string_at(index, CHECK_NULL); 1968 return (jstring) JNIHandles::make_local(str); 1969 } 1970 JVM_END 1971 1972 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1973 { 1974 JVMWrapper("JVM_ConstantPoolGetUTF8At"); 1975 JvmtiVMObjectAllocEventCollector oam; 1976 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1977 bounds_check(cp, index, CHECK_NULL); 1978 constantTag tag = cp->tag_at(index); 1979 if (!tag.is_symbol()) { 1980 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1981 } 1982 symbolOop sym_o = cp->symbol_at(index); 1983 symbolHandle sym(THREAD, sym_o); 1984 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 1985 return (jstring) JNIHandles::make_local(str()); 1986 } 1987 JVM_END 1988 1989 1990 // Assertion support. ////////////////////////////////////////////////////////// 1991 1992 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls)) 1993 JVMWrapper("JVM_DesiredAssertionStatus"); 1994 assert(cls != NULL, "bad class"); 1995 1996 oop r = JNIHandles::resolve(cls); 1997 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed"); 1998 if (java_lang_Class::is_primitive(r)) return false; 1999 2000 klassOop k = java_lang_Class::as_klassOop(r); 2001 assert(Klass::cast(k)->oop_is_instance(), "must be an instance klass"); 2002 if (! Klass::cast(k)->oop_is_instance()) return false; 2003 2004 ResourceMark rm(THREAD); 2005 const char* name = Klass::cast(k)->name()->as_C_string(); 2006 bool system_class = Klass::cast(k)->class_loader() == NULL; 2007 return JavaAssertions::enabled(name, system_class); 2008 2009 JVM_END 2010 2011 2012 // Return a new AssertionStatusDirectives object with the fields filled in with 2013 // command-line assertion arguments (i.e., -ea, -da). 2014 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused)) 2015 JVMWrapper("JVM_AssertionStatusDirectives"); 2016 JvmtiVMObjectAllocEventCollector oam; 2017 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL); 2018 return JNIHandles::make_local(env, asd); 2019 JVM_END 2020 2021 // Verification //////////////////////////////////////////////////////////////////////////////// 2022 2023 // Reflection for the verifier ///////////////////////////////////////////////////////////////// 2024 2025 // RedefineClasses support: bug 6214132 caused verification to fail. 2026 // All functions from this section should call the jvmtiThreadSate function: 2027 // klassOop class_to_verify_considering_redefinition(klassOop klass). 2028 // The function returns a klassOop of the _scratch_class if the verifier 2029 // was invoked in the middle of the class redefinition. 2030 // Otherwise it returns its argument value which is the _the_class klassOop. 2031 // Please, refer to the description in the jvmtiThreadSate.hpp. 2032 2033 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls)) 2034 JVMWrapper("JVM_GetClassNameUTF"); 2035 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2036 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2037 return Klass::cast(k)->name()->as_utf8(); 2038 JVM_END 2039 2040 2041 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types)) 2042 JVMWrapper("JVM_GetClassCPTypes"); 2043 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2044 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2045 // types will have length zero if this is not an instanceKlass 2046 // (length is determined by call to JVM_GetClassCPEntriesCount) 2047 if (Klass::cast(k)->oop_is_instance()) { 2048 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2049 for (int index = cp->length() - 1; index >= 0; index--) { 2050 constantTag tag = cp->tag_at(index); 2051 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : 2052 (tag.is_unresolved_string()) ? JVM_CONSTANT_String : tag.value(); 2053 } 2054 } 2055 JVM_END 2056 2057 2058 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls)) 2059 JVMWrapper("JVM_GetClassCPEntriesCount"); 2060 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2061 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2062 if (!Klass::cast(k)->oop_is_instance()) 2063 return 0; 2064 return instanceKlass::cast(k)->constants()->length(); 2065 JVM_END 2066 2067 2068 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls)) 2069 JVMWrapper("JVM_GetClassFieldsCount"); 2070 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2071 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2072 if (!Klass::cast(k)->oop_is_instance()) 2073 return 0; 2074 return instanceKlass::cast(k)->fields()->length() / instanceKlass::next_offset; 2075 JVM_END 2076 2077 2078 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls)) 2079 JVMWrapper("JVM_GetClassMethodsCount"); 2080 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2081 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2082 if (!Klass::cast(k)->oop_is_instance()) 2083 return 0; 2084 return instanceKlass::cast(k)->methods()->length(); 2085 JVM_END 2086 2087 2088 // The following methods, used for the verifier, are never called with 2089 // array klasses, so a direct cast to instanceKlass is safe. 2090 // Typically, these methods are called in a loop with bounds determined 2091 // by the results of JVM_GetClass{Fields,Methods}Count, which return 2092 // zero for arrays. 2093 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions)) 2094 JVMWrapper("JVM_GetMethodIxExceptionIndexes"); 2095 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2096 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2097 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2098 int length = methodOop(method)->checked_exceptions_length(); 2099 if (length > 0) { 2100 CheckedExceptionElement* table= methodOop(method)->checked_exceptions_start(); 2101 for (int i = 0; i < length; i++) { 2102 exceptions[i] = table[i].class_cp_index; 2103 } 2104 } 2105 JVM_END 2106 2107 2108 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index)) 2109 JVMWrapper("JVM_GetMethodIxExceptionsCount"); 2110 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2111 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2112 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2113 return methodOop(method)->checked_exceptions_length(); 2114 JVM_END 2115 2116 2117 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code)) 2118 JVMWrapper("JVM_GetMethodIxByteCode"); 2119 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2120 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2121 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2122 memcpy(code, methodOop(method)->code_base(), methodOop(method)->code_size()); 2123 JVM_END 2124 2125 2126 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index)) 2127 JVMWrapper("JVM_GetMethodIxByteCodeLength"); 2128 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2129 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2130 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2131 return methodOop(method)->code_size(); 2132 JVM_END 2133 2134 2135 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry)) 2136 JVMWrapper("JVM_GetMethodIxExceptionTableEntry"); 2137 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2138 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2139 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2140 typeArrayOop extable = methodOop(method)->exception_table(); 2141 entry->start_pc = extable->int_at(entry_index * 4); 2142 entry->end_pc = extable->int_at(entry_index * 4 + 1); 2143 entry->handler_pc = extable->int_at(entry_index * 4 + 2); 2144 entry->catchType = extable->int_at(entry_index * 4 + 3); 2145 JVM_END 2146 2147 2148 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index)) 2149 JVMWrapper("JVM_GetMethodIxExceptionTableLength"); 2150 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2151 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2152 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2153 return methodOop(method)->exception_table()->length() / 4; 2154 JVM_END 2155 2156 2157 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index)) 2158 JVMWrapper("JVM_GetMethodIxModifiers"); 2159 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2160 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2161 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2162 return methodOop(method)->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2163 JVM_END 2164 2165 2166 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index)) 2167 JVMWrapper("JVM_GetFieldIxModifiers"); 2168 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2169 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2170 typeArrayOop fields = instanceKlass::cast(k)->fields(); 2171 return fields->ushort_at(field_index * instanceKlass::next_offset + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS; 2172 JVM_END 2173 2174 2175 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index)) 2176 JVMWrapper("JVM_GetMethodIxLocalsCount"); 2177 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2178 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2179 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2180 return methodOop(method)->max_locals(); 2181 JVM_END 2182 2183 2184 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index)) 2185 JVMWrapper("JVM_GetMethodIxArgsSize"); 2186 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2187 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2188 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2189 return methodOop(method)->size_of_parameters(); 2190 JVM_END 2191 2192 2193 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index)) 2194 JVMWrapper("JVM_GetMethodIxMaxStack"); 2195 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2196 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2197 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2198 return methodOop(method)->max_stack(); 2199 JVM_END 2200 2201 2202 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index)) 2203 JVMWrapper("JVM_IsConstructorIx"); 2204 ResourceMark rm(THREAD); 2205 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2206 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2207 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2208 return methodOop(method)->name() == vmSymbols::object_initializer_name(); 2209 JVM_END 2210 2211 2212 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index)) 2213 JVMWrapper("JVM_GetMethodIxIxUTF"); 2214 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2215 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2216 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2217 return methodOop(method)->name()->as_utf8(); 2218 JVM_END 2219 2220 2221 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index)) 2222 JVMWrapper("JVM_GetMethodIxSignatureUTF"); 2223 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2224 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2225 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2226 return methodOop(method)->signature()->as_utf8(); 2227 JVM_END 2228 2229 /** 2230 * All of these JVM_GetCP-xxx methods are used by the old verifier to 2231 * read entries in the constant pool. Since the old verifier always 2232 * works on a copy of the code, it will not see any rewriting that 2233 * may possibly occur in the middle of verification. So it is important 2234 * that nothing it calls tries to use the cpCache instead of the raw 2235 * constant pool, so we must use cp->uncached_x methods when appropriate. 2236 */ 2237 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2238 JVMWrapper("JVM_GetCPFieldNameUTF"); 2239 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2240 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2241 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2242 switch (cp->tag_at(cp_index).value()) { 2243 case JVM_CONSTANT_Fieldref: 2244 return cp->uncached_name_ref_at(cp_index)->as_utf8(); 2245 default: 2246 fatal("JVM_GetCPFieldNameUTF: illegal constant"); 2247 } 2248 ShouldNotReachHere(); 2249 return NULL; 2250 JVM_END 2251 2252 2253 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2254 JVMWrapper("JVM_GetCPMethodNameUTF"); 2255 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2256 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2257 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2258 switch (cp->tag_at(cp_index).value()) { 2259 case JVM_CONSTANT_InterfaceMethodref: 2260 case JVM_CONSTANT_Methodref: 2261 case JVM_CONSTANT_NameAndType: // for invokedynamic 2262 return cp->uncached_name_ref_at(cp_index)->as_utf8(); 2263 default: 2264 fatal("JVM_GetCPMethodNameUTF: illegal constant"); 2265 } 2266 ShouldNotReachHere(); 2267 return NULL; 2268 JVM_END 2269 2270 2271 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) 2272 JVMWrapper("JVM_GetCPMethodSignatureUTF"); 2273 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2274 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2275 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2276 switch (cp->tag_at(cp_index).value()) { 2277 case JVM_CONSTANT_InterfaceMethodref: 2278 case JVM_CONSTANT_Methodref: 2279 case JVM_CONSTANT_NameAndType: // for invokedynamic 2280 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); 2281 default: 2282 fatal("JVM_GetCPMethodSignatureUTF: illegal constant"); 2283 } 2284 ShouldNotReachHere(); 2285 return NULL; 2286 JVM_END 2287 2288 2289 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) 2290 JVMWrapper("JVM_GetCPFieldSignatureUTF"); 2291 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2292 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2293 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2294 switch (cp->tag_at(cp_index).value()) { 2295 case JVM_CONSTANT_Fieldref: 2296 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); 2297 default: 2298 fatal("JVM_GetCPFieldSignatureUTF: illegal constant"); 2299 } 2300 ShouldNotReachHere(); 2301 return NULL; 2302 JVM_END 2303 2304 2305 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2306 JVMWrapper("JVM_GetCPClassNameUTF"); 2307 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2308 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2309 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2310 symbolOop classname = cp->klass_name_at(cp_index); 2311 return classname->as_utf8(); 2312 JVM_END 2313 2314 2315 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2316 JVMWrapper("JVM_GetCPFieldClassNameUTF"); 2317 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2318 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2319 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2320 switch (cp->tag_at(cp_index).value()) { 2321 case JVM_CONSTANT_Fieldref: { 2322 int class_index = cp->uncached_klass_ref_index_at(cp_index); 2323 symbolOop classname = cp->klass_name_at(class_index); 2324 return classname->as_utf8(); 2325 } 2326 default: 2327 fatal("JVM_GetCPFieldClassNameUTF: illegal constant"); 2328 } 2329 ShouldNotReachHere(); 2330 return NULL; 2331 JVM_END 2332 2333 2334 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2335 JVMWrapper("JVM_GetCPMethodClassNameUTF"); 2336 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2337 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2338 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2339 switch (cp->tag_at(cp_index).value()) { 2340 case JVM_CONSTANT_Methodref: 2341 case JVM_CONSTANT_InterfaceMethodref: { 2342 int class_index = cp->uncached_klass_ref_index_at(cp_index); 2343 symbolOop classname = cp->klass_name_at(class_index); 2344 return classname->as_utf8(); 2345 } 2346 default: 2347 fatal("JVM_GetCPMethodClassNameUTF: illegal constant"); 2348 } 2349 ShouldNotReachHere(); 2350 return NULL; 2351 JVM_END 2352 2353 2354 JVM_QUICK_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) 2355 JVMWrapper("JVM_GetCPFieldModifiers"); 2356 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2357 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls)); 2358 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2359 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); 2360 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2361 constantPoolOop cp_called = instanceKlass::cast(k_called)->constants(); 2362 switch (cp->tag_at(cp_index).value()) { 2363 case JVM_CONSTANT_Fieldref: { 2364 symbolOop name = cp->uncached_name_ref_at(cp_index); 2365 symbolOop signature = cp->uncached_signature_ref_at(cp_index); 2366 typeArrayOop fields = instanceKlass::cast(k_called)->fields(); 2367 int fields_count = fields->length(); 2368 for (int i = 0; i < fields_count; i += instanceKlass::next_offset) { 2369 if (cp_called->symbol_at(fields->ushort_at(i + instanceKlass::name_index_offset)) == name && 2370 cp_called->symbol_at(fields->ushort_at(i + instanceKlass::signature_index_offset)) == signature) { 2371 return fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS; 2372 } 2373 } 2374 return -1; 2375 } 2376 default: 2377 fatal("JVM_GetCPFieldModifiers: illegal constant"); 2378 } 2379 ShouldNotReachHere(); 2380 return 0; 2381 JVM_END 2382 2383 2384 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) 2385 JVMWrapper("JVM_GetCPMethodModifiers"); 2386 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2387 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls)); 2388 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2389 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); 2390 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2391 switch (cp->tag_at(cp_index).value()) { 2392 case JVM_CONSTANT_Methodref: 2393 case JVM_CONSTANT_InterfaceMethodref: { 2394 symbolOop name = cp->uncached_name_ref_at(cp_index); 2395 symbolOop signature = cp->uncached_signature_ref_at(cp_index); 2396 objArrayOop methods = instanceKlass::cast(k_called)->methods(); 2397 int methods_count = methods->length(); 2398 for (int i = 0; i < methods_count; i++) { 2399 methodOop method = methodOop(methods->obj_at(i)); 2400 if (method->name() == name && method->signature() == signature) { 2401 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2402 } 2403 } 2404 return -1; 2405 } 2406 default: 2407 fatal("JVM_GetCPMethodModifiers: illegal constant"); 2408 } 2409 ShouldNotReachHere(); 2410 return 0; 2411 JVM_END 2412 2413 2414 // Misc ////////////////////////////////////////////////////////////////////////////////////////////// 2415 2416 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf)) 2417 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything 2418 JVM_END 2419 2420 2421 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2)) 2422 JVMWrapper("JVM_IsSameClassPackage"); 2423 oop class1_mirror = JNIHandles::resolve_non_null(class1); 2424 oop class2_mirror = JNIHandles::resolve_non_null(class2); 2425 klassOop klass1 = java_lang_Class::as_klassOop(class1_mirror); 2426 klassOop klass2 = java_lang_Class::as_klassOop(class2_mirror); 2427 return (jboolean) Reflection::is_same_class_package(klass1, klass2); 2428 JVM_END 2429 2430 2431 // IO functions //////////////////////////////////////////////////////////////////////////////////////// 2432 2433 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode)) 2434 JVMWrapper2("JVM_Open (%s)", fname); 2435 2436 //%note jvm_r6 2437 int result = hpi::open(fname, flags, mode); 2438 if (result >= 0) { 2439 return result; 2440 } else { 2441 switch(errno) { 2442 case EEXIST: 2443 return JVM_EEXIST; 2444 default: 2445 return -1; 2446 } 2447 } 2448 JVM_END 2449 2450 2451 JVM_LEAF(jint, JVM_Close(jint fd)) 2452 JVMWrapper2("JVM_Close (0x%x)", fd); 2453 //%note jvm_r6 2454 return hpi::close(fd); 2455 JVM_END 2456 2457 2458 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes)) 2459 JVMWrapper2("JVM_Read (0x%x)", fd); 2460 2461 //%note jvm_r6 2462 return (jint)hpi::read(fd, buf, nbytes); 2463 JVM_END 2464 2465 2466 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes)) 2467 JVMWrapper2("JVM_Write (0x%x)", fd); 2468 2469 //%note jvm_r6 2470 return (jint)hpi::write(fd, buf, nbytes); 2471 JVM_END 2472 2473 2474 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes)) 2475 JVMWrapper2("JVM_Available (0x%x)", fd); 2476 //%note jvm_r6 2477 return hpi::available(fd, pbytes); 2478 JVM_END 2479 2480 2481 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence)) 2482 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence); 2483 //%note jvm_r6 2484 return hpi::lseek(fd, offset, whence); 2485 JVM_END 2486 2487 2488 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length)) 2489 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length); 2490 return hpi::ftruncate(fd, length); 2491 JVM_END 2492 2493 2494 JVM_LEAF(jint, JVM_Sync(jint fd)) 2495 JVMWrapper2("JVM_Sync (0x%x)", fd); 2496 //%note jvm_r6 2497 return hpi::fsync(fd); 2498 JVM_END 2499 2500 2501 // Printing support ////////////////////////////////////////////////// 2502 extern "C" { 2503 2504 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) { 2505 // see bug 4399518, 4417214 2506 if ((intptr_t)count <= 0) return -1; 2507 return vsnprintf(str, count, fmt, args); 2508 } 2509 2510 2511 int jio_snprintf(char *str, size_t count, const char *fmt, ...) { 2512 va_list args; 2513 int len; 2514 va_start(args, fmt); 2515 len = jio_vsnprintf(str, count, fmt, args); 2516 va_end(args); 2517 return len; 2518 } 2519 2520 2521 int jio_fprintf(FILE* f, const char *fmt, ...) { 2522 int len; 2523 va_list args; 2524 va_start(args, fmt); 2525 len = jio_vfprintf(f, fmt, args); 2526 va_end(args); 2527 return len; 2528 } 2529 2530 2531 int jio_vfprintf(FILE* f, const char *fmt, va_list args) { 2532 if (Arguments::vfprintf_hook() != NULL) { 2533 return Arguments::vfprintf_hook()(f, fmt, args); 2534 } else { 2535 return vfprintf(f, fmt, args); 2536 } 2537 } 2538 2539 2540 int jio_printf(const char *fmt, ...) { 2541 int len; 2542 va_list args; 2543 va_start(args, fmt); 2544 len = jio_vfprintf(defaultStream::output_stream(), fmt, args); 2545 va_end(args); 2546 return len; 2547 } 2548 2549 2550 // HotSpot specific jio method 2551 void jio_print(const char* s) { 2552 // Try to make this function as atomic as possible. 2553 if (Arguments::vfprintf_hook() != NULL) { 2554 jio_fprintf(defaultStream::output_stream(), "%s", s); 2555 } else { 2556 // Make an unused local variable to avoid warning from gcc 4.x compiler. 2557 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s)); 2558 } 2559 } 2560 2561 } // Extern C 2562 2563 // java.lang.Thread ////////////////////////////////////////////////////////////////////////////// 2564 2565 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock 2566 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or 2567 // OSThread objects. The exception to this rule is when the target object is the thread 2568 // doing the operation, in which case we know that the thread won't exit until the 2569 // operation is done (all exits being voluntary). There are a few cases where it is 2570 // rather silly to do operations on yourself, like resuming yourself or asking whether 2571 // you are alive. While these can still happen, they are not subject to deadlocks if 2572 // the lock is held while the operation occurs (this is not the case for suspend, for 2573 // instance), and are very unlikely. Because IsAlive needs to be fast and its 2574 // implementation is local to this file, we always lock Threads_lock for that one. 2575 2576 static void thread_entry(JavaThread* thread, TRAPS) { 2577 HandleMark hm(THREAD); 2578 Handle obj(THREAD, thread->threadObj()); 2579 JavaValue result(T_VOID); 2580 JavaCalls::call_virtual(&result, 2581 obj, 2582 KlassHandle(THREAD, SystemDictionary::Thread_klass()), 2583 vmSymbolHandles::run_method_name(), 2584 vmSymbolHandles::void_method_signature(), 2585 THREAD); 2586 } 2587 2588 2589 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread)) 2590 JVMWrapper("JVM_StartThread"); 2591 JavaThread *native_thread = NULL; 2592 2593 // We cannot hold the Threads_lock when we throw an exception, 2594 // due to rank ordering issues. Example: we might need to grab the 2595 // Heap_lock while we construct the exception. 2596 bool throw_illegal_thread_state = false; 2597 2598 // We must release the Threads_lock before we can post a jvmti event 2599 // in Thread::start. 2600 { 2601 // Ensure that the C++ Thread and OSThread structures aren't freed before 2602 // we operate. 2603 MutexLocker mu(Threads_lock); 2604 2605 // Check to see if we're running a thread that's already exited or was 2606 // stopped (is_stillborn) or is still active (thread is not NULL). 2607 if (java_lang_Thread::is_stillborn(JNIHandles::resolve_non_null(jthread)) || 2608 java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) { 2609 throw_illegal_thread_state = true; 2610 } else { 2611 jlong size = 2612 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread)); 2613 // Allocate the C++ Thread structure and create the native thread. The 2614 // stack size retrieved from java is signed, but the constructor takes 2615 // size_t (an unsigned type), so avoid passing negative values which would 2616 // result in really large stacks. 2617 size_t sz = size > 0 ? (size_t) size : 0; 2618 native_thread = new JavaThread(&thread_entry, sz); 2619 2620 // At this point it may be possible that no osthread was created for the 2621 // JavaThread due to lack of memory. Check for this situation and throw 2622 // an exception if necessary. Eventually we may want to change this so 2623 // that we only grab the lock if the thread was created successfully - 2624 // then we can also do this check and throw the exception in the 2625 // JavaThread constructor. 2626 if (native_thread->osthread() != NULL) { 2627 // Note: the current thread is not being used within "prepare". 2628 native_thread->prepare(jthread); 2629 } 2630 } 2631 } 2632 2633 if (throw_illegal_thread_state) { 2634 THROW(vmSymbols::java_lang_IllegalThreadStateException()); 2635 } 2636 2637 assert(native_thread != NULL, "Starting null thread?"); 2638 2639 if (native_thread->osthread() == NULL) { 2640 // No one should hold a reference to the 'native_thread'. 2641 delete native_thread; 2642 if (JvmtiExport::should_post_resource_exhausted()) { 2643 JvmtiExport::post_resource_exhausted( 2644 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS, 2645 "unable to create new native thread"); 2646 } 2647 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), 2648 "unable to create new native thread"); 2649 } 2650 2651 Thread::start(native_thread); 2652 2653 JVM_END 2654 2655 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints 2656 // before the quasi-asynchronous exception is delivered. This is a little obtrusive, 2657 // but is thought to be reliable and simple. In the case, where the receiver is the 2658 // save thread as the sender, no safepoint is needed. 2659 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable)) 2660 JVMWrapper("JVM_StopThread"); 2661 2662 oop java_throwable = JNIHandles::resolve(throwable); 2663 if (java_throwable == NULL) { 2664 THROW(vmSymbols::java_lang_NullPointerException()); 2665 } 2666 oop java_thread = JNIHandles::resolve_non_null(jthread); 2667 JavaThread* receiver = java_lang_Thread::thread(java_thread); 2668 Events::log("JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", receiver, (address)java_thread, throwable); 2669 // First check if thread already exited 2670 if (receiver != NULL) { 2671 // Check if exception is getting thrown at self (use oop equality, since the 2672 // target object might exit) 2673 if (java_thread == thread->threadObj()) { 2674 // This is a change from JDK 1.1, but JDK 1.2 will also do it: 2675 // NOTE (from JDK 1.2): this is done solely to prevent stopped 2676 // threads from being restarted. 2677 // Fix for 4314342, 4145910, perhaps others: it now doesn't have 2678 // any effect on the "liveness" of a thread; see 2679 // JVM_IsThreadAlive, below. 2680 if (java_throwable->is_a(SystemDictionary::ThreadDeath_klass())) { 2681 java_lang_Thread::set_stillborn(java_thread); 2682 } 2683 THROW_OOP(java_throwable); 2684 } else { 2685 // Enques a VM_Operation to stop all threads and then deliver the exception... 2686 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable)); 2687 } 2688 } 2689 JVM_END 2690 2691 2692 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread)) 2693 JVMWrapper("JVM_IsThreadAlive"); 2694 2695 oop thread_oop = JNIHandles::resolve_non_null(jthread); 2696 return java_lang_Thread::is_alive(thread_oop); 2697 JVM_END 2698 2699 2700 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread)) 2701 JVMWrapper("JVM_SuspendThread"); 2702 oop java_thread = JNIHandles::resolve_non_null(jthread); 2703 JavaThread* receiver = java_lang_Thread::thread(java_thread); 2704 2705 if (receiver != NULL) { 2706 // thread has run and has not exited (still on threads list) 2707 2708 { 2709 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag); 2710 if (receiver->is_external_suspend()) { 2711 // Don't allow nested external suspend requests. We can't return 2712 // an error from this interface so just ignore the problem. 2713 return; 2714 } 2715 if (receiver->is_exiting()) { // thread is in the process of exiting 2716 return; 2717 } 2718 receiver->set_external_suspend(); 2719 } 2720 2721 // java_suspend() will catch threads in the process of exiting 2722 // and will ignore them. 2723 receiver->java_suspend(); 2724 2725 // It would be nice to have the following assertion in all the 2726 // time, but it is possible for a racing resume request to have 2727 // resumed this thread right after we suspended it. Temporarily 2728 // enable this assertion if you are chasing a different kind of 2729 // bug. 2730 // 2731 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL || 2732 // receiver->is_being_ext_suspended(), "thread is not suspended"); 2733 } 2734 JVM_END 2735 2736 2737 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread)) 2738 JVMWrapper("JVM_ResumeThread"); 2739 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate. 2740 // We need to *always* get the threads lock here, since this operation cannot be allowed during 2741 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other 2742 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code 2743 // looks at it. 2744 MutexLocker ml(Threads_lock); 2745 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 2746 if (thr != NULL) { 2747 // the thread has run and is not in the process of exiting 2748 thr->java_resume(); 2749 } 2750 JVM_END 2751 2752 2753 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio)) 2754 JVMWrapper("JVM_SetThreadPriority"); 2755 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 2756 MutexLocker ml(Threads_lock); 2757 oop java_thread = JNIHandles::resolve_non_null(jthread); 2758 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio); 2759 JavaThread* thr = java_lang_Thread::thread(java_thread); 2760 if (thr != NULL) { // Thread not yet started; priority pushed down when it is 2761 Thread::set_priority(thr, (ThreadPriority)prio); 2762 } 2763 JVM_END 2764 2765 2766 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass)) 2767 JVMWrapper("JVM_Yield"); 2768 if (os::dont_yield()) return; 2769 HS_DTRACE_PROBE0(hotspot, thread__yield); 2770 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield. 2771 // Critical for similar threading behaviour 2772 if (ConvertYieldToSleep) { 2773 os::sleep(thread, MinSleepInterval, false); 2774 } else { 2775 os::yield(); 2776 } 2777 JVM_END 2778 2779 2780 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis)) 2781 JVMWrapper("JVM_Sleep"); 2782 2783 if (millis < 0) { 2784 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative"); 2785 } 2786 2787 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) { 2788 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); 2789 } 2790 2791 // Save current thread state and restore it at the end of this block. 2792 // And set new thread state to SLEEPING. 2793 JavaThreadSleepState jtss(thread); 2794 2795 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis); 2796 2797 if (millis == 0) { 2798 // When ConvertSleepToYield is on, this matches the classic VM implementation of 2799 // JVM_Sleep. Critical for similar threading behaviour (Win32) 2800 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep 2801 // for SOLARIS 2802 if (ConvertSleepToYield) { 2803 os::yield(); 2804 } else { 2805 ThreadState old_state = thread->osthread()->get_state(); 2806 thread->osthread()->set_state(SLEEPING); 2807 os::sleep(thread, MinSleepInterval, false); 2808 thread->osthread()->set_state(old_state); 2809 } 2810 } else { 2811 ThreadState old_state = thread->osthread()->get_state(); 2812 thread->osthread()->set_state(SLEEPING); 2813 if (os::sleep(thread, millis, true) == OS_INTRPT) { 2814 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on 2815 // us while we were sleeping. We do not overwrite those. 2816 if (!HAS_PENDING_EXCEPTION) { 2817 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1); 2818 // TODO-FIXME: THROW_MSG returns which means we will not call set_state() 2819 // to properly restore the thread state. That's likely wrong. 2820 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); 2821 } 2822 } 2823 thread->osthread()->set_state(old_state); 2824 } 2825 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0); 2826 JVM_END 2827 2828 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass)) 2829 JVMWrapper("JVM_CurrentThread"); 2830 oop jthread = thread->threadObj(); 2831 assert (thread != NULL, "no current thread!"); 2832 return JNIHandles::make_local(env, jthread); 2833 JVM_END 2834 2835 2836 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread)) 2837 JVMWrapper("JVM_CountStackFrames"); 2838 2839 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 2840 oop java_thread = JNIHandles::resolve_non_null(jthread); 2841 bool throw_illegal_thread_state = false; 2842 int count = 0; 2843 2844 { 2845 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 2846 // We need to re-resolve the java_thread, since a GC might have happened during the 2847 // acquire of the lock 2848 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 2849 2850 if (thr == NULL) { 2851 // do nothing 2852 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) { 2853 // Check whether this java thread has been suspended already. If not, throws 2854 // IllegalThreadStateException. We defer to throw that exception until 2855 // Threads_lock is released since loading exception class has to leave VM. 2856 // The correct way to test a thread is actually suspended is 2857 // wait_for_ext_suspend_completion(), but we can't call that while holding 2858 // the Threads_lock. The above tests are sufficient for our purposes 2859 // provided the walkability of the stack is stable - which it isn't 2860 // 100% but close enough for most practical purposes. 2861 throw_illegal_thread_state = true; 2862 } else { 2863 // Count all java activation, i.e., number of vframes 2864 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) { 2865 // Native frames are not counted 2866 if (!vfst.method()->is_native()) count++; 2867 } 2868 } 2869 } 2870 2871 if (throw_illegal_thread_state) { 2872 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(), 2873 "this thread is not suspended"); 2874 } 2875 return count; 2876 JVM_END 2877 2878 // Consider: A better way to implement JVM_Interrupt() is to acquire 2879 // Threads_lock to resolve the jthread into a Thread pointer, fetch 2880 // Thread->platformevent, Thread->native_thr, Thread->parker, etc., 2881 // drop Threads_lock, and the perform the unpark() and thr_kill() operations 2882 // outside the critical section. Threads_lock is hot so we want to minimize 2883 // the hold-time. A cleaner interface would be to decompose interrupt into 2884 // two steps. The 1st phase, performed under Threads_lock, would return 2885 // a closure that'd be invoked after Threads_lock was dropped. 2886 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and 2887 // admit spurious wakeups. 2888 2889 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread)) 2890 JVMWrapper("JVM_Interrupt"); 2891 2892 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 2893 oop java_thread = JNIHandles::resolve_non_null(jthread); 2894 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 2895 // We need to re-resolve the java_thread, since a GC might have happened during the 2896 // acquire of the lock 2897 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 2898 if (thr != NULL) { 2899 Thread::interrupt(thr); 2900 } 2901 JVM_END 2902 2903 2904 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted)) 2905 JVMWrapper("JVM_IsInterrupted"); 2906 2907 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 2908 oop java_thread = JNIHandles::resolve_non_null(jthread); 2909 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 2910 // We need to re-resolve the java_thread, since a GC might have happened during the 2911 // acquire of the lock 2912 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 2913 if (thr == NULL) { 2914 return JNI_FALSE; 2915 } else { 2916 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0); 2917 } 2918 JVM_END 2919 2920 2921 // Return true iff the current thread has locked the object passed in 2922 2923 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj)) 2924 JVMWrapper("JVM_HoldsLock"); 2925 assert(THREAD->is_Java_thread(), "sanity check"); 2926 if (obj == NULL) { 2927 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); 2928 } 2929 Handle h_obj(THREAD, JNIHandles::resolve(obj)); 2930 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj); 2931 JVM_END 2932 2933 2934 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass)) 2935 JVMWrapper("JVM_DumpAllStacks"); 2936 VM_PrintThreads op; 2937 VMThread::execute(&op); 2938 if (JvmtiExport::should_post_data_dump()) { 2939 JvmtiExport::post_data_dump(); 2940 } 2941 JVM_END 2942 2943 2944 // java.lang.SecurityManager /////////////////////////////////////////////////////////////////////// 2945 2946 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) { 2947 assert(jthread->is_Java_thread(), "must be a Java thread"); 2948 if (jthread->privileged_stack_top() == NULL) return false; 2949 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) { 2950 oop loader = jthread->privileged_stack_top()->class_loader(); 2951 if (loader == NULL) return true; 2952 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); 2953 if (trusted) return true; 2954 } 2955 return false; 2956 } 2957 2958 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env)) 2959 JVMWrapper("JVM_CurrentLoadedClass"); 2960 ResourceMark rm(THREAD); 2961 2962 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 2963 // if a method in a class in a trusted loader is in a doPrivileged, return NULL 2964 bool trusted = is_trusted_frame(thread, &vfst); 2965 if (trusted) return NULL; 2966 2967 methodOop m = vfst.method(); 2968 if (!m->is_native()) { 2969 klassOop holder = m->method_holder(); 2970 oop loader = instanceKlass::cast(holder)->class_loader(); 2971 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 2972 return (jclass) JNIHandles::make_local(env, Klass::cast(holder)->java_mirror()); 2973 } 2974 } 2975 } 2976 return NULL; 2977 JVM_END 2978 2979 2980 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env)) 2981 JVMWrapper("JVM_CurrentClassLoader"); 2982 ResourceMark rm(THREAD); 2983 2984 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 2985 2986 // if a method in a class in a trusted loader is in a doPrivileged, return NULL 2987 bool trusted = is_trusted_frame(thread, &vfst); 2988 if (trusted) return NULL; 2989 2990 methodOop m = vfst.method(); 2991 if (!m->is_native()) { 2992 klassOop holder = m->method_holder(); 2993 assert(holder->is_klass(), "just checking"); 2994 oop loader = instanceKlass::cast(holder)->class_loader(); 2995 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 2996 return JNIHandles::make_local(env, loader); 2997 } 2998 } 2999 } 3000 return NULL; 3001 JVM_END 3002 3003 3004 // Utility object for collecting method holders walking down the stack 3005 class KlassLink: public ResourceObj { 3006 public: 3007 KlassHandle klass; 3008 KlassLink* next; 3009 3010 KlassLink(KlassHandle k) { klass = k; next = NULL; } 3011 }; 3012 3013 3014 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env)) 3015 JVMWrapper("JVM_GetClassContext"); 3016 ResourceMark rm(THREAD); 3017 JvmtiVMObjectAllocEventCollector oam; 3018 // Collect linked list of (handles to) method holders 3019 KlassLink* first = NULL; 3020 KlassLink* last = NULL; 3021 int depth = 0; 3022 3023 for(vframeStream vfst(thread); !vfst.at_end(); vfst.security_get_caller_frame(1)) { 3024 // Native frames are not returned 3025 if (!vfst.method()->is_native()) { 3026 klassOop holder = vfst.method()->method_holder(); 3027 assert(holder->is_klass(), "just checking"); 3028 depth++; 3029 KlassLink* l = new KlassLink(KlassHandle(thread, holder)); 3030 if (first == NULL) { 3031 first = last = l; 3032 } else { 3033 last->next = l; 3034 last = l; 3035 } 3036 } 3037 } 3038 3039 // Create result array of type [Ljava/lang/Class; 3040 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), depth, CHECK_NULL); 3041 // Fill in mirrors corresponding to method holders 3042 int index = 0; 3043 while (first != NULL) { 3044 result->obj_at_put(index++, Klass::cast(first->klass())->java_mirror()); 3045 first = first->next; 3046 } 3047 assert(index == depth, "just checking"); 3048 3049 return (jobjectArray) JNIHandles::make_local(env, result); 3050 JVM_END 3051 3052 3053 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name)) 3054 JVMWrapper("JVM_ClassDepth"); 3055 ResourceMark rm(THREAD); 3056 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); 3057 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0); 3058 3059 const char* str = java_lang_String::as_utf8_string(class_name_str()); 3060 symbolHandle class_name_sym = 3061 symbolHandle(THREAD, SymbolTable::probe(str, (int)strlen(str))); 3062 if (class_name_sym.is_null()) { 3063 return -1; 3064 } 3065 3066 int depth = 0; 3067 3068 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3069 if (!vfst.method()->is_native()) { 3070 klassOop holder = vfst.method()->method_holder(); 3071 assert(holder->is_klass(), "just checking"); 3072 if (instanceKlass::cast(holder)->name() == class_name_sym()) { 3073 return depth; 3074 } 3075 depth++; 3076 } 3077 } 3078 return -1; 3079 JVM_END 3080 3081 3082 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env)) 3083 JVMWrapper("JVM_ClassLoaderDepth"); 3084 ResourceMark rm(THREAD); 3085 int depth = 0; 3086 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3087 // if a method in a class in a trusted loader is in a doPrivileged, return -1 3088 bool trusted = is_trusted_frame(thread, &vfst); 3089 if (trusted) return -1; 3090 3091 methodOop m = vfst.method(); 3092 if (!m->is_native()) { 3093 klassOop holder = m->method_holder(); 3094 assert(holder->is_klass(), "just checking"); 3095 oop loader = instanceKlass::cast(holder)->class_loader(); 3096 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3097 return depth; 3098 } 3099 depth++; 3100 } 3101 } 3102 return -1; 3103 JVM_END 3104 3105 3106 // java.lang.Package //////////////////////////////////////////////////////////////// 3107 3108 3109 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name)) 3110 JVMWrapper("JVM_GetSystemPackage"); 3111 ResourceMark rm(THREAD); 3112 JvmtiVMObjectAllocEventCollector oam; 3113 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); 3114 oop result = ClassLoader::get_system_package(str, CHECK_NULL); 3115 return (jstring) JNIHandles::make_local(result); 3116 JVM_END 3117 3118 3119 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env)) 3120 JVMWrapper("JVM_GetSystemPackages"); 3121 JvmtiVMObjectAllocEventCollector oam; 3122 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL); 3123 return (jobjectArray) JNIHandles::make_local(result); 3124 JVM_END 3125 3126 3127 // ObjectInputStream /////////////////////////////////////////////////////////////// 3128 3129 bool force_verify_field_access(klassOop current_class, klassOop field_class, AccessFlags access, bool classloader_only) { 3130 if (current_class == NULL) { 3131 return true; 3132 } 3133 if ((current_class == field_class) || access.is_public()) { 3134 return true; 3135 } 3136 3137 if (access.is_protected()) { 3138 // See if current_class is a subclass of field_class 3139 if (Klass::cast(current_class)->is_subclass_of(field_class)) { 3140 return true; 3141 } 3142 } 3143 3144 return (!access.is_private() && instanceKlass::cast(current_class)->is_same_class_package(field_class)); 3145 } 3146 3147 3148 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4 3149 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass)) 3150 JVMWrapper("JVM_AllocateNewObject"); 3151 JvmtiVMObjectAllocEventCollector oam; 3152 // Receiver is not used 3153 oop curr_mirror = JNIHandles::resolve_non_null(currClass); 3154 oop init_mirror = JNIHandles::resolve_non_null(initClass); 3155 3156 // Cannot instantiate primitive types 3157 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) { 3158 ResourceMark rm(THREAD); 3159 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3160 } 3161 3162 // Arrays not allowed here, must use JVM_AllocateNewArray 3163 if (Klass::cast(java_lang_Class::as_klassOop(curr_mirror))->oop_is_javaArray() || 3164 Klass::cast(java_lang_Class::as_klassOop(init_mirror))->oop_is_javaArray()) { 3165 ResourceMark rm(THREAD); 3166 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3167 } 3168 3169 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_klassOop(curr_mirror)); 3170 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_klassOop(init_mirror)); 3171 3172 assert(curr_klass->is_subclass_of(init_klass()), "just checking"); 3173 3174 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly. 3175 curr_klass->check_valid_for_instantiation(false, CHECK_NULL); 3176 3177 // Make sure klass is initialized, since we are about to instantiate one of them. 3178 curr_klass->initialize(CHECK_NULL); 3179 3180 methodHandle m (THREAD, 3181 init_klass->find_method(vmSymbols::object_initializer_name(), 3182 vmSymbols::void_method_signature())); 3183 if (m.is_null()) { 3184 ResourceMark rm(THREAD); 3185 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), 3186 methodOopDesc::name_and_sig_as_C_string(Klass::cast(init_klass()), 3187 vmSymbols::object_initializer_name(), 3188 vmSymbols::void_method_signature())); 3189 } 3190 3191 if (curr_klass == init_klass && !m->is_public()) { 3192 // Calling the constructor for class 'curr_klass'. 3193 // Only allow calls to a public no-arg constructor. 3194 // This path corresponds to creating an Externalizable object. 3195 THROW_0(vmSymbols::java_lang_IllegalAccessException()); 3196 } 3197 3198 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) { 3199 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb' 3200 THROW_0(vmSymbols::java_lang_IllegalAccessException()); 3201 } 3202 3203 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL); 3204 // Call constructor m. This might call a constructor higher up in the hierachy 3205 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL); 3206 3207 return JNIHandles::make_local(obj()); 3208 JVM_END 3209 3210 3211 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length)) 3212 JVMWrapper("JVM_AllocateNewArray"); 3213 JvmtiVMObjectAllocEventCollector oam; 3214 oop mirror = JNIHandles::resolve_non_null(currClass); 3215 3216 if (java_lang_Class::is_primitive(mirror)) { 3217 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3218 } 3219 klassOop k = java_lang_Class::as_klassOop(mirror); 3220 oop result; 3221 3222 if (k->klass_part()->oop_is_typeArray()) { 3223 // typeArray 3224 result = typeArrayKlass::cast(k)->allocate(length, CHECK_NULL); 3225 } else if (k->klass_part()->oop_is_objArray()) { 3226 // objArray 3227 objArrayKlassHandle oak(THREAD, k); 3228 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior) 3229 result = oak->allocate(length, CHECK_NULL); 3230 } else { 3231 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3232 } 3233 return JNIHandles::make_local(env, result); 3234 JVM_END 3235 3236 3237 // Return the first non-null class loader up the execution stack, or null 3238 // if only code from the null class loader is on the stack. 3239 3240 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env)) 3241 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3242 // UseNewReflection 3243 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection 3244 klassOop holder = vfst.method()->method_holder(); 3245 oop loader = instanceKlass::cast(holder)->class_loader(); 3246 if (loader != NULL) { 3247 return JNIHandles::make_local(env, loader); 3248 } 3249 } 3250 return NULL; 3251 JVM_END 3252 3253 3254 // Load a class relative to the most recent class on the stack with a non-null 3255 // classloader. 3256 // This function has been deprecated and should not be considered part of the 3257 // specified JVM interface. 3258 3259 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver, 3260 jclass currClass, jstring currClassName)) 3261 JVMWrapper("JVM_LoadClass0"); 3262 // Receiver is not used 3263 ResourceMark rm(THREAD); 3264 3265 // Class name argument is not guaranteed to be in internal format 3266 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName)); 3267 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL); 3268 3269 const char* str = java_lang_String::as_utf8_string(string()); 3270 3271 if (str == NULL || (int)strlen(str) > symbolOopDesc::max_length()) { 3272 // It's impossible to create this class; the name cannot fit 3273 // into the constant pool. 3274 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str); 3275 } 3276 3277 symbolHandle name = oopFactory::new_symbol_handle(str, CHECK_NULL); 3278 Handle curr_klass (THREAD, JNIHandles::resolve(currClass)); 3279 // Find the most recent class on the stack with a non-null classloader 3280 oop loader = NULL; 3281 oop protection_domain = NULL; 3282 if (curr_klass.is_null()) { 3283 for (vframeStream vfst(thread); 3284 !vfst.at_end() && loader == NULL; 3285 vfst.next()) { 3286 if (!vfst.method()->is_native()) { 3287 klassOop holder = vfst.method()->method_holder(); 3288 loader = instanceKlass::cast(holder)->class_loader(); 3289 protection_domain = instanceKlass::cast(holder)->protection_domain(); 3290 } 3291 } 3292 } else { 3293 klassOop curr_klass_oop = java_lang_Class::as_klassOop(curr_klass()); 3294 loader = instanceKlass::cast(curr_klass_oop)->class_loader(); 3295 protection_domain = instanceKlass::cast(curr_klass_oop)->protection_domain(); 3296 } 3297 Handle h_loader(THREAD, loader); 3298 Handle h_prot (THREAD, protection_domain); 3299 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot, 3300 false, thread); 3301 if (TraceClassResolution && result != NULL) { 3302 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result))); 3303 } 3304 return result; 3305 JVM_END 3306 3307 3308 // Array /////////////////////////////////////////////////////////////////////////////////////////// 3309 3310 3311 // resolve array handle and check arguments 3312 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) { 3313 if (arr == NULL) { 3314 THROW_0(vmSymbols::java_lang_NullPointerException()); 3315 } 3316 oop a = JNIHandles::resolve_non_null(arr); 3317 if (!a->is_javaArray() || (type_array_only && !a->is_typeArray())) { 3318 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array"); 3319 } 3320 return arrayOop(a); 3321 } 3322 3323 3324 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr)) 3325 JVMWrapper("JVM_GetArrayLength"); 3326 arrayOop a = check_array(env, arr, false, CHECK_0); 3327 return a->length(); 3328 JVM_END 3329 3330 3331 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index)) 3332 JVMWrapper("JVM_Array_Get"); 3333 JvmtiVMObjectAllocEventCollector oam; 3334 arrayOop a = check_array(env, arr, false, CHECK_NULL); 3335 jvalue value; 3336 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL); 3337 oop box = Reflection::box(&value, type, CHECK_NULL); 3338 return JNIHandles::make_local(env, box); 3339 JVM_END 3340 3341 3342 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode)) 3343 JVMWrapper("JVM_GetPrimitiveArrayElement"); 3344 jvalue value; 3345 value.i = 0; // to initialize value before getting used in CHECK 3346 arrayOop a = check_array(env, arr, true, CHECK_(value)); 3347 assert(a->is_typeArray(), "just checking"); 3348 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value)); 3349 BasicType wide_type = (BasicType) wCode; 3350 if (type != wide_type) { 3351 Reflection::widen(&value, type, wide_type, CHECK_(value)); 3352 } 3353 return value; 3354 JVM_END 3355 3356 3357 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val)) 3358 JVMWrapper("JVM_SetArrayElement"); 3359 arrayOop a = check_array(env, arr, false, CHECK); 3360 oop box = JNIHandles::resolve(val); 3361 jvalue value; 3362 value.i = 0; // to initialize value before getting used in CHECK 3363 BasicType value_type; 3364 if (a->is_objArray()) { 3365 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array 3366 value_type = Reflection::unbox_for_regular_object(box, &value); 3367 } else { 3368 value_type = Reflection::unbox_for_primitive(box, &value, CHECK); 3369 } 3370 Reflection::array_set(&value, a, index, value_type, CHECK); 3371 JVM_END 3372 3373 3374 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode)) 3375 JVMWrapper("JVM_SetPrimitiveArrayElement"); 3376 arrayOop a = check_array(env, arr, true, CHECK); 3377 assert(a->is_typeArray(), "just checking"); 3378 BasicType value_type = (BasicType) vCode; 3379 Reflection::array_set(&v, a, index, value_type, CHECK); 3380 JVM_END 3381 3382 3383 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length)) 3384 JVMWrapper("JVM_NewArray"); 3385 JvmtiVMObjectAllocEventCollector oam; 3386 oop element_mirror = JNIHandles::resolve(eltClass); 3387 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL); 3388 return JNIHandles::make_local(env, result); 3389 JVM_END 3390 3391 3392 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim)) 3393 JVMWrapper("JVM_NewMultiArray"); 3394 JvmtiVMObjectAllocEventCollector oam; 3395 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL); 3396 oop element_mirror = JNIHandles::resolve(eltClass); 3397 assert(dim_array->is_typeArray(), "just checking"); 3398 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL); 3399 return JNIHandles::make_local(env, result); 3400 JVM_END 3401 3402 3403 // Networking library support //////////////////////////////////////////////////////////////////// 3404 3405 JVM_LEAF(jint, JVM_InitializeSocketLibrary()) 3406 JVMWrapper("JVM_InitializeSocketLibrary"); 3407 return hpi::initialize_socket_library(); 3408 JVM_END 3409 3410 3411 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol)) 3412 JVMWrapper("JVM_Socket"); 3413 return hpi::socket(domain, type, protocol); 3414 JVM_END 3415 3416 3417 JVM_LEAF(jint, JVM_SocketClose(jint fd)) 3418 JVMWrapper2("JVM_SocketClose (0x%x)", fd); 3419 //%note jvm_r6 3420 return hpi::socket_close(fd); 3421 JVM_END 3422 3423 3424 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto)) 3425 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd); 3426 //%note jvm_r6 3427 return hpi::socket_shutdown(fd, howto); 3428 JVM_END 3429 3430 3431 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags)) 3432 JVMWrapper2("JVM_Recv (0x%x)", fd); 3433 //%note jvm_r6 3434 return hpi::recv(fd, buf, nBytes, flags); 3435 JVM_END 3436 3437 3438 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags)) 3439 JVMWrapper2("JVM_Send (0x%x)", fd); 3440 //%note jvm_r6 3441 return hpi::send(fd, buf, nBytes, flags); 3442 JVM_END 3443 3444 3445 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout)) 3446 JVMWrapper2("JVM_Timeout (0x%x)", fd); 3447 //%note jvm_r6 3448 return hpi::timeout(fd, timeout); 3449 JVM_END 3450 3451 3452 JVM_LEAF(jint, JVM_Listen(jint fd, jint count)) 3453 JVMWrapper2("JVM_Listen (0x%x)", fd); 3454 //%note jvm_r6 3455 return hpi::listen(fd, count); 3456 JVM_END 3457 3458 3459 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len)) 3460 JVMWrapper2("JVM_Connect (0x%x)", fd); 3461 //%note jvm_r6 3462 return hpi::connect(fd, him, len); 3463 JVM_END 3464 3465 3466 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len)) 3467 JVMWrapper2("JVM_Bind (0x%x)", fd); 3468 //%note jvm_r6 3469 return hpi::bind(fd, him, len); 3470 JVM_END 3471 3472 3473 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len)) 3474 JVMWrapper2("JVM_Accept (0x%x)", fd); 3475 //%note jvm_r6 3476 return hpi::accept(fd, him, (int *)len); 3477 JVM_END 3478 3479 3480 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen)) 3481 JVMWrapper2("JVM_RecvFrom (0x%x)", fd); 3482 //%note jvm_r6 3483 return hpi::recvfrom(fd, buf, nBytes, flags, from, fromlen); 3484 JVM_END 3485 3486 3487 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len)) 3488 JVMWrapper2("JVM_GetSockName (0x%x)", fd); 3489 //%note jvm_r6 3490 return hpi::get_sock_name(fd, him, len); 3491 JVM_END 3492 3493 3494 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen)) 3495 JVMWrapper2("JVM_SendTo (0x%x)", fd); 3496 //%note jvm_r6 3497 return hpi::sendto(fd, buf, len, flags, to, tolen); 3498 JVM_END 3499 3500 3501 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes)) 3502 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd); 3503 //%note jvm_r6 3504 return hpi::socket_available(fd, pbytes); 3505 JVM_END 3506 3507 3508 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen)) 3509 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); 3510 //%note jvm_r6 3511 return hpi::get_sock_opt(fd, level, optname, optval, optlen); 3512 JVM_END 3513 3514 3515 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen)) 3516 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); 3517 //%note jvm_r6 3518 return hpi::set_sock_opt(fd, level, optname, optval, optlen); 3519 JVM_END 3520 3521 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen)) 3522 JVMWrapper("JVM_GetHostName"); 3523 return hpi::get_host_name(name, namelen); 3524 JVM_END 3525 3526 #ifdef _WINDOWS 3527 3528 JVM_LEAF(struct hostent*, JVM_GetHostByAddr(const char* name, int len, int type)) 3529 JVMWrapper("JVM_GetHostByAddr"); 3530 return hpi::get_host_by_addr(name, len, type); 3531 JVM_END 3532 3533 3534 JVM_LEAF(struct hostent*, JVM_GetHostByName(char* name)) 3535 JVMWrapper("JVM_GetHostByName"); 3536 return hpi::get_host_by_name(name); 3537 JVM_END 3538 3539 3540 JVM_LEAF(struct protoent*, JVM_GetProtoByName(char* name)) 3541 JVMWrapper("JVM_GetProtoByName"); 3542 return hpi::get_proto_by_name(name); 3543 JVM_END 3544 3545 #endif 3546 3547 // Library support /////////////////////////////////////////////////////////////////////////// 3548 3549 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name)) 3550 //%note jvm_ct 3551 JVMWrapper2("JVM_LoadLibrary (%s)", name); 3552 char ebuf[1024]; 3553 void *load_result; 3554 { 3555 ThreadToNativeFromVM ttnfvm(thread); 3556 load_result = hpi::dll_load(name, ebuf, sizeof ebuf); 3557 } 3558 if (load_result == NULL) { 3559 char msg[1024]; 3560 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf); 3561 // Since 'ebuf' may contain a string encoded using 3562 // platform encoding scheme, we need to pass 3563 // Exceptions::unsafe_to_utf8 to the new_exception method 3564 // as the last argument. See bug 6367357. 3565 Handle h_exception = 3566 Exceptions::new_exception(thread, 3567 vmSymbols::java_lang_UnsatisfiedLinkError(), 3568 msg, Exceptions::unsafe_to_utf8); 3569 3570 THROW_HANDLE_0(h_exception); 3571 } 3572 return load_result; 3573 JVM_END 3574 3575 3576 JVM_LEAF(void, JVM_UnloadLibrary(void* handle)) 3577 JVMWrapper("JVM_UnloadLibrary"); 3578 hpi::dll_unload(handle); 3579 JVM_END 3580 3581 3582 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name)) 3583 JVMWrapper2("JVM_FindLibraryEntry (%s)", name); 3584 return hpi::dll_lookup(handle, name); 3585 JVM_END 3586 3587 // Floating point support //////////////////////////////////////////////////////////////////// 3588 3589 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a)) 3590 JVMWrapper("JVM_IsNaN"); 3591 return g_isnan(a); 3592 JVM_END 3593 3594 3595 3596 // JNI version /////////////////////////////////////////////////////////////////////////////// 3597 3598 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version)) 3599 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version); 3600 return Threads::is_supported_jni_version_including_1_1(version); 3601 JVM_END 3602 3603 3604 // String support /////////////////////////////////////////////////////////////////////////// 3605 3606 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str)) 3607 JVMWrapper("JVM_InternString"); 3608 JvmtiVMObjectAllocEventCollector oam; 3609 if (str == NULL) return NULL; 3610 oop string = JNIHandles::resolve_non_null(str); 3611 oop result = StringTable::intern(string, CHECK_NULL); 3612 return (jstring) JNIHandles::make_local(env, result); 3613 JVM_END 3614 3615 3616 // Raw monitor support ////////////////////////////////////////////////////////////////////// 3617 3618 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock 3619 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because 3620 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check 3621 // that only works with java threads. 3622 3623 3624 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) { 3625 VM_Exit::block_if_vm_exited(); 3626 JVMWrapper("JVM_RawMonitorCreate"); 3627 return new Mutex(Mutex::native, "JVM_RawMonitorCreate"); 3628 } 3629 3630 3631 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) { 3632 VM_Exit::block_if_vm_exited(); 3633 JVMWrapper("JVM_RawMonitorDestroy"); 3634 delete ((Mutex*) mon); 3635 } 3636 3637 3638 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) { 3639 VM_Exit::block_if_vm_exited(); 3640 JVMWrapper("JVM_RawMonitorEnter"); 3641 ((Mutex*) mon)->jvm_raw_lock(); 3642 return 0; 3643 } 3644 3645 3646 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) { 3647 VM_Exit::block_if_vm_exited(); 3648 JVMWrapper("JVM_RawMonitorExit"); 3649 ((Mutex*) mon)->jvm_raw_unlock(); 3650 } 3651 3652 3653 // Support for Serialization 3654 3655 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value); 3656 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value); 3657 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value); 3658 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value); 3659 3660 static IntBitsToFloatFn int_bits_to_float_fn = NULL; 3661 static LongBitsToDoubleFn long_bits_to_double_fn = NULL; 3662 static FloatToIntBitsFn float_to_int_bits_fn = NULL; 3663 static DoubleToLongBitsFn double_to_long_bits_fn = NULL; 3664 3665 3666 void initialize_converter_functions() { 3667 if (JDK_Version::is_gte_jdk14x_version()) { 3668 // These functions only exist for compatibility with 1.3.1 and earlier 3669 return; 3670 } 3671 3672 // called from universe_post_init() 3673 assert( 3674 int_bits_to_float_fn == NULL && 3675 long_bits_to_double_fn == NULL && 3676 float_to_int_bits_fn == NULL && 3677 double_to_long_bits_fn == NULL , 3678 "initialization done twice" 3679 ); 3680 // initialize 3681 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F")); 3682 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D")); 3683 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I")); 3684 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J")); 3685 // verify 3686 assert( 3687 int_bits_to_float_fn != NULL && 3688 long_bits_to_double_fn != NULL && 3689 float_to_int_bits_fn != NULL && 3690 double_to_long_bits_fn != NULL , 3691 "initialization failed" 3692 ); 3693 } 3694 3695 3696 // Serialization 3697 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj, 3698 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data)) 3699 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier"); 3700 3701 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes)); 3702 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data)); 3703 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs)); 3704 oop o = JNIHandles::resolve(obj); 3705 3706 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) { 3707 THROW(vmSymbols::java_lang_NullPointerException()); 3708 } 3709 3710 jsize nfids = fids->length(); 3711 if (nfids == 0) return; 3712 3713 if (tcodes->length() < nfids) { 3714 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); 3715 } 3716 3717 jsize off = 0; 3718 /* loop through fields, setting values */ 3719 for (jsize i = 0; i < nfids; i++) { 3720 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i); 3721 int field_offset; 3722 if (fid != NULL) { 3723 // NULL is a legal value for fid, but retrieving the field offset 3724 // trigger assertion in that case 3725 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); 3726 } 3727 3728 switch (tcodes->char_at(i)) { 3729 case 'Z': 3730 if (fid != NULL) { 3731 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE; 3732 o->bool_field_put(field_offset, val); 3733 } 3734 off++; 3735 break; 3736 3737 case 'B': 3738 if (fid != NULL) { 3739 o->byte_field_put(field_offset, dbuf->byte_at(off)); 3740 } 3741 off++; 3742 break; 3743 3744 case 'C': 3745 if (fid != NULL) { 3746 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8) 3747 + ((dbuf->byte_at(off + 1) & 0xFF) << 0); 3748 o->char_field_put(field_offset, val); 3749 } 3750 off += 2; 3751 break; 3752 3753 case 'S': 3754 if (fid != NULL) { 3755 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8) 3756 + ((dbuf->byte_at(off + 1) & 0xFF) << 0); 3757 o->short_field_put(field_offset, val); 3758 } 3759 off += 2; 3760 break; 3761 3762 case 'I': 3763 if (fid != NULL) { 3764 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24) 3765 + ((dbuf->byte_at(off + 1) & 0xFF) << 16) 3766 + ((dbuf->byte_at(off + 2) & 0xFF) << 8) 3767 + ((dbuf->byte_at(off + 3) & 0xFF) << 0); 3768 o->int_field_put(field_offset, ival); 3769 } 3770 off += 4; 3771 break; 3772 3773 case 'F': 3774 if (fid != NULL) { 3775 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24) 3776 + ((dbuf->byte_at(off + 1) & 0xFF) << 16) 3777 + ((dbuf->byte_at(off + 2) & 0xFF) << 8) 3778 + ((dbuf->byte_at(off + 3) & 0xFF) << 0); 3779 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival); 3780 o->float_field_put(field_offset, fval); 3781 } 3782 off += 4; 3783 break; 3784 3785 case 'J': 3786 if (fid != NULL) { 3787 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56) 3788 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48) 3789 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40) 3790 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32) 3791 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24) 3792 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16) 3793 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8) 3794 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0); 3795 o->long_field_put(field_offset, lval); 3796 } 3797 off += 8; 3798 break; 3799 3800 case 'D': 3801 if (fid != NULL) { 3802 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56) 3803 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48) 3804 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40) 3805 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32) 3806 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24) 3807 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16) 3808 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8) 3809 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0); 3810 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval); 3811 o->double_field_put(field_offset, dval); 3812 } 3813 off += 8; 3814 break; 3815 3816 default: 3817 // Illegal typecode 3818 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode"); 3819 } 3820 } 3821 JVM_END 3822 3823 3824 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj, 3825 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data)) 3826 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier"); 3827 3828 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes)); 3829 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data)); 3830 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs)); 3831 oop o = JNIHandles::resolve(obj); 3832 3833 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) { 3834 THROW(vmSymbols::java_lang_NullPointerException()); 3835 } 3836 3837 jsize nfids = fids->length(); 3838 if (nfids == 0) return; 3839 3840 if (tcodes->length() < nfids) { 3841 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); 3842 } 3843 3844 /* loop through fields, fetching values */ 3845 jsize off = 0; 3846 for (jsize i = 0; i < nfids; i++) { 3847 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i); 3848 if (fid == NULL) { 3849 THROW(vmSymbols::java_lang_NullPointerException()); 3850 } 3851 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); 3852 3853 switch (tcodes->char_at(i)) { 3854 case 'Z': 3855 { 3856 jboolean val = o->bool_field(field_offset); 3857 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0); 3858 } 3859 break; 3860 3861 case 'B': 3862 dbuf->byte_at_put(off++, o->byte_field(field_offset)); 3863 break; 3864 3865 case 'C': 3866 { 3867 jchar val = o->char_field(field_offset); 3868 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 3869 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 3870 } 3871 break; 3872 3873 case 'S': 3874 { 3875 jshort val = o->short_field(field_offset); 3876 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 3877 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 3878 } 3879 break; 3880 3881 case 'I': 3882 { 3883 jint val = o->int_field(field_offset); 3884 dbuf->byte_at_put(off++, (val >> 24) & 0xFF); 3885 dbuf->byte_at_put(off++, (val >> 16) & 0xFF); 3886 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 3887 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 3888 } 3889 break; 3890 3891 case 'F': 3892 { 3893 jfloat fval = o->float_field(field_offset); 3894 jint ival = (*float_to_int_bits_fn)(env, NULL, fval); 3895 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF); 3896 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF); 3897 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF); 3898 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF); 3899 } 3900 break; 3901 3902 case 'J': 3903 { 3904 jlong val = o->long_field(field_offset); 3905 dbuf->byte_at_put(off++, (val >> 56) & 0xFF); 3906 dbuf->byte_at_put(off++, (val >> 48) & 0xFF); 3907 dbuf->byte_at_put(off++, (val >> 40) & 0xFF); 3908 dbuf->byte_at_put(off++, (val >> 32) & 0xFF); 3909 dbuf->byte_at_put(off++, (val >> 24) & 0xFF); 3910 dbuf->byte_at_put(off++, (val >> 16) & 0xFF); 3911 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 3912 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 3913 } 3914 break; 3915 3916 case 'D': 3917 { 3918 jdouble dval = o->double_field(field_offset); 3919 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval); 3920 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF); 3921 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF); 3922 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF); 3923 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF); 3924 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF); 3925 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF); 3926 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF); 3927 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF); 3928 } 3929 break; 3930 3931 default: 3932 // Illegal typecode 3933 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode"); 3934 } 3935 } 3936 JVM_END 3937 3938 3939 // Shared JNI/JVM entry points ////////////////////////////////////////////////////////////// 3940 3941 jclass find_class_from_class_loader(JNIEnv* env, symbolHandle name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) { 3942 // Security Note: 3943 // The Java level wrapper will perform the necessary security check allowing 3944 // us to pass the NULL as the initiating class loader. 3945 klassOop klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL); 3946 3947 KlassHandle klass_handle(THREAD, klass); 3948 // Check if we should initialize the class 3949 if (init && klass_handle->oop_is_instance()) { 3950 klass_handle->initialize(CHECK_NULL); 3951 } 3952 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror()); 3953 } 3954 3955 3956 // Internal SQE debugging support /////////////////////////////////////////////////////////// 3957 3958 #ifndef PRODUCT 3959 3960 extern "C" { 3961 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get); 3962 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get); 3963 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj); 3964 } 3965 3966 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get)) 3967 JVMWrapper("JVM_AccessBoolVMFlag"); 3968 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL); 3969 JVM_END 3970 3971 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get)) 3972 JVMWrapper("JVM_AccessVMIntFlag"); 3973 intx v; 3974 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL); 3975 *value = (jint)v; 3976 return result; 3977 JVM_END 3978 3979 3980 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj)) 3981 JVMWrapper("JVM_VMBreakPoint"); 3982 oop the_obj = JNIHandles::resolve(obj); 3983 BREAKPOINT; 3984 JVM_END 3985 3986 3987 #endif 3988 3989 3990 //--------------------------------------------------------------------------- 3991 // 3992 // Support for old native code-based reflection (pre-JDK 1.4) 3993 // Disabled by default in the product build. 3994 // 3995 // See reflection.hpp for information on SUPPORT_OLD_REFLECTION 3996 // 3997 //--------------------------------------------------------------------------- 3998 3999 #ifdef SUPPORT_OLD_REFLECTION 4000 4001 JVM_ENTRY(jobjectArray, JVM_GetClassFields(JNIEnv *env, jclass cls, jint which)) 4002 JVMWrapper("JVM_GetClassFields"); 4003 JvmtiVMObjectAllocEventCollector oam; 4004 oop mirror = JNIHandles::resolve_non_null(cls); 4005 objArrayOop result = Reflection::reflect_fields(mirror, which, CHECK_NULL); 4006 return (jobjectArray) JNIHandles::make_local(env, result); 4007 JVM_END 4008 4009 4010 JVM_ENTRY(jobjectArray, JVM_GetClassMethods(JNIEnv *env, jclass cls, jint which)) 4011 JVMWrapper("JVM_GetClassMethods"); 4012 JvmtiVMObjectAllocEventCollector oam; 4013 oop mirror = JNIHandles::resolve_non_null(cls); 4014 objArrayOop result = Reflection::reflect_methods(mirror, which, CHECK_NULL); 4015 //%note jvm_r4 4016 return (jobjectArray) JNIHandles::make_local(env, result); 4017 JVM_END 4018 4019 4020 JVM_ENTRY(jobjectArray, JVM_GetClassConstructors(JNIEnv *env, jclass cls, jint which)) 4021 JVMWrapper("JVM_GetClassConstructors"); 4022 JvmtiVMObjectAllocEventCollector oam; 4023 oop mirror = JNIHandles::resolve_non_null(cls); 4024 objArrayOop result = Reflection::reflect_constructors(mirror, which, CHECK_NULL); 4025 //%note jvm_r4 4026 return (jobjectArray) JNIHandles::make_local(env, result); 4027 JVM_END 4028 4029 4030 JVM_ENTRY(jobject, JVM_GetClassField(JNIEnv *env, jclass cls, jstring name, jint which)) 4031 JVMWrapper("JVM_GetClassField"); 4032 JvmtiVMObjectAllocEventCollector oam; 4033 if (name == NULL) return NULL; 4034 Handle str (THREAD, JNIHandles::resolve_non_null(name)); 4035 4036 const char* cstr = java_lang_String::as_utf8_string(str()); 4037 symbolHandle field_name = 4038 symbolHandle(THREAD, SymbolTable::probe(cstr, (int)strlen(cstr))); 4039 if (field_name.is_null()) { 4040 THROW_0(vmSymbols::java_lang_NoSuchFieldException()); 4041 } 4042 4043 oop mirror = JNIHandles::resolve_non_null(cls); 4044 oop result = Reflection::reflect_field(mirror, field_name(), which, CHECK_NULL); 4045 if (result == NULL) { 4046 THROW_0(vmSymbols::java_lang_NoSuchFieldException()); 4047 } 4048 return JNIHandles::make_local(env, result); 4049 JVM_END 4050 4051 4052 JVM_ENTRY(jobject, JVM_GetClassMethod(JNIEnv *env, jclass cls, jstring name, jobjectArray types, jint which)) 4053 JVMWrapper("JVM_GetClassMethod"); 4054 JvmtiVMObjectAllocEventCollector oam; 4055 if (name == NULL) { 4056 THROW_0(vmSymbols::java_lang_NullPointerException()); 4057 } 4058 Handle str (THREAD, JNIHandles::resolve_non_null(name)); 4059 4060 const char* cstr = java_lang_String::as_utf8_string(str()); 4061 symbolHandle method_name = 4062 symbolHandle(THREAD, SymbolTable::probe(cstr, (int)strlen(cstr))); 4063 if (method_name.is_null()) { 4064 THROW_0(vmSymbols::java_lang_NoSuchMethodException()); 4065 } 4066 4067 oop mirror = JNIHandles::resolve_non_null(cls); 4068 objArrayHandle tarray (THREAD, objArrayOop(JNIHandles::resolve(types))); 4069 oop result = Reflection::reflect_method(mirror, method_name, tarray, 4070 which, CHECK_NULL); 4071 if (result == NULL) { 4072 THROW_0(vmSymbols::java_lang_NoSuchMethodException()); 4073 } 4074 return JNIHandles::make_local(env, result); 4075 JVM_END 4076 4077 4078 JVM_ENTRY(jobject, JVM_GetClassConstructor(JNIEnv *env, jclass cls, jobjectArray types, jint which)) 4079 JVMWrapper("JVM_GetClassConstructor"); 4080 JvmtiVMObjectAllocEventCollector oam; 4081 oop mirror = JNIHandles::resolve_non_null(cls); 4082 objArrayHandle tarray (THREAD, objArrayOop(JNIHandles::resolve(types))); 4083 oop result = Reflection::reflect_constructor(mirror, tarray, which, CHECK_NULL); 4084 if (result == NULL) { 4085 THROW_0(vmSymbols::java_lang_NoSuchMethodException()); 4086 } 4087 return (jobject) JNIHandles::make_local(env, result); 4088 JVM_END 4089 4090 4091 // Instantiation /////////////////////////////////////////////////////////////////////////////// 4092 4093 JVM_ENTRY(jobject, JVM_NewInstance(JNIEnv *env, jclass cls)) 4094 JVMWrapper("JVM_NewInstance"); 4095 Handle mirror(THREAD, JNIHandles::resolve_non_null(cls)); 4096 4097 methodOop resolved_constructor = java_lang_Class::resolved_constructor(mirror()); 4098 if (resolved_constructor == NULL) { 4099 klassOop k = java_lang_Class::as_klassOop(mirror()); 4100 // The java.lang.Class object caches a resolved constructor if all the checks 4101 // below were done successfully and a constructor was found. 4102 4103 // Do class based checks 4104 if (java_lang_Class::is_primitive(mirror())) { 4105 const char* msg = ""; 4106 if (mirror == Universe::bool_mirror()) msg = "java/lang/Boolean"; 4107 else if (mirror == Universe::char_mirror()) msg = "java/lang/Character"; 4108 else if (mirror == Universe::float_mirror()) msg = "java/lang/Float"; 4109 else if (mirror == Universe::double_mirror()) msg = "java/lang/Double"; 4110 else if (mirror == Universe::byte_mirror()) msg = "java/lang/Byte"; 4111 else if (mirror == Universe::short_mirror()) msg = "java/lang/Short"; 4112 else if (mirror == Universe::int_mirror()) msg = "java/lang/Integer"; 4113 else if (mirror == Universe::long_mirror()) msg = "java/lang/Long"; 4114 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), msg); 4115 } 4116 4117 // Check whether we are allowed to instantiate this class 4118 Klass::cast(k)->check_valid_for_instantiation(false, CHECK_NULL); // Array classes get caught here 4119 instanceKlassHandle klass(THREAD, k); 4120 // Make sure class is initialized (also so all methods are rewritten) 4121 klass->initialize(CHECK_NULL); 4122 4123 // Lookup default constructor 4124 resolved_constructor = klass->find_method(vmSymbols::object_initializer_name(), vmSymbols::void_method_signature()); 4125 if (resolved_constructor == NULL) { 4126 ResourceMark rm(THREAD); 4127 THROW_MSG_0(vmSymbols::java_lang_InstantiationException(), klass->external_name()); 4128 } 4129 4130 // Cache result in java.lang.Class object. Does not have to be MT safe. 4131 java_lang_Class::set_resolved_constructor(mirror(), resolved_constructor); 4132 } 4133 4134 assert(resolved_constructor != NULL, "sanity check"); 4135 methodHandle constructor = methodHandle(THREAD, resolved_constructor); 4136 4137 // We have an initialized instanceKlass with a default constructor 4138 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls))); 4139 assert(klass->is_initialized() || klass->is_being_initialized(), "sanity check"); 4140 4141 // Do security check 4142 klassOop caller_klass = NULL; 4143 if (UsePrivilegedStack) { 4144 caller_klass = thread->security_get_caller_class(2); 4145 4146 if (!Reflection::verify_class_access(caller_klass, klass(), false) || 4147 !Reflection::verify_field_access(caller_klass, 4148 klass(), 4149 klass(), 4150 constructor->access_flags(), 4151 false, 4152 true)) { 4153 ResourceMark rm(THREAD); 4154 THROW_MSG_0(vmSymbols::java_lang_IllegalAccessException(), klass->external_name()); 4155 } 4156 } 4157 4158 // Allocate object and call constructor 4159 Handle receiver = klass->allocate_instance_handle(CHECK_NULL); 4160 JavaCalls::call_default_constructor(thread, constructor, receiver, CHECK_NULL); 4161 4162 jobject res = JNIHandles::make_local(env, receiver()); 4163 if (JvmtiExport::should_post_vm_object_alloc()) { 4164 JvmtiExport::post_vm_object_alloc(JavaThread::current(), receiver()); 4165 } 4166 return res; 4167 JVM_END 4168 4169 4170 // Field //////////////////////////////////////////////////////////////////////////////////////////// 4171 4172 JVM_ENTRY(jobject, JVM_GetField(JNIEnv *env, jobject field, jobject obj)) 4173 JVMWrapper("JVM_GetField"); 4174 JvmtiVMObjectAllocEventCollector oam; 4175 Handle field_mirror(thread, JNIHandles::resolve(field)); 4176 Handle receiver (thread, JNIHandles::resolve(obj)); 4177 fieldDescriptor fd; 4178 Reflection::resolve_field(field_mirror, receiver, &fd, false, CHECK_NULL); 4179 jvalue value; 4180 BasicType type = Reflection::field_get(&value, &fd, receiver); 4181 oop box = Reflection::box(&value, type, CHECK_NULL); 4182 return JNIHandles::make_local(env, box); 4183 JVM_END 4184 4185 4186 JVM_ENTRY(jvalue, JVM_GetPrimitiveField(JNIEnv *env, jobject field, jobject obj, unsigned char wCode)) 4187 JVMWrapper("JVM_GetPrimitiveField"); 4188 Handle field_mirror(thread, JNIHandles::resolve(field)); 4189 Handle receiver (thread, JNIHandles::resolve(obj)); 4190 fieldDescriptor fd; 4191 jvalue value; 4192 value.j = 0; 4193 Reflection::resolve_field(field_mirror, receiver, &fd, false, CHECK_(value)); 4194 BasicType type = Reflection::field_get(&value, &fd, receiver); 4195 BasicType wide_type = (BasicType) wCode; 4196 if (type != wide_type) { 4197 Reflection::widen(&value, type, wide_type, CHECK_(value)); 4198 } 4199 return value; 4200 JVM_END // should really be JVM_END, but that doesn't work for union types! 4201 4202 4203 JVM_ENTRY(void, JVM_SetField(JNIEnv *env, jobject field, jobject obj, jobject val)) 4204 JVMWrapper("JVM_SetField"); 4205 Handle field_mirror(thread, JNIHandles::resolve(field)); 4206 Handle receiver (thread, JNIHandles::resolve(obj)); 4207 oop box = JNIHandles::resolve(val); 4208 fieldDescriptor fd; 4209 Reflection::resolve_field(field_mirror, receiver, &fd, true, CHECK); 4210 BasicType field_type = fd.field_type(); 4211 jvalue value; 4212 BasicType value_type; 4213 if (field_type == T_OBJECT || field_type == T_ARRAY) { 4214 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array 4215 value_type = Reflection::unbox_for_regular_object(box, &value); 4216 Reflection::field_set(&value, &fd, receiver, field_type, CHECK); 4217 } else { 4218 value_type = Reflection::unbox_for_primitive(box, &value, CHECK); 4219 Reflection::field_set(&value, &fd, receiver, value_type, CHECK); 4220 } 4221 JVM_END 4222 4223 4224 JVM_ENTRY(void, JVM_SetPrimitiveField(JNIEnv *env, jobject field, jobject obj, jvalue v, unsigned char vCode)) 4225 JVMWrapper("JVM_SetPrimitiveField"); 4226 Handle field_mirror(thread, JNIHandles::resolve(field)); 4227 Handle receiver (thread, JNIHandles::resolve(obj)); 4228 fieldDescriptor fd; 4229 Reflection::resolve_field(field_mirror, receiver, &fd, true, CHECK); 4230 BasicType value_type = (BasicType) vCode; 4231 Reflection::field_set(&v, &fd, receiver, value_type, CHECK); 4232 JVM_END 4233 4234 4235 // Method /////////////////////////////////////////////////////////////////////////////////////////// 4236 4237 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0)) 4238 JVMWrapper("JVM_InvokeMethod"); 4239 Handle method_handle; 4240 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) { 4241 method_handle = Handle(THREAD, JNIHandles::resolve(method)); 4242 Handle receiver(THREAD, JNIHandles::resolve(obj)); 4243 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); 4244 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL); 4245 jobject res = JNIHandles::make_local(env, result); 4246 if (JvmtiExport::should_post_vm_object_alloc()) { 4247 oop ret_type = java_lang_reflect_Method::return_type(method_handle()); 4248 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!"); 4249 if (java_lang_Class::is_primitive(ret_type)) { 4250 // Only for primitive type vm allocates memory for java object. 4251 // See box() method. 4252 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); 4253 } 4254 } 4255 return res; 4256 } else { 4257 THROW_0(vmSymbols::java_lang_StackOverflowError()); 4258 } 4259 JVM_END 4260 4261 4262 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0)) 4263 JVMWrapper("JVM_NewInstanceFromConstructor"); 4264 oop constructor_mirror = JNIHandles::resolve(c); 4265 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); 4266 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL); 4267 jobject res = JNIHandles::make_local(env, result); 4268 if (JvmtiExport::should_post_vm_object_alloc()) { 4269 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); 4270 } 4271 return res; 4272 JVM_END 4273 4274 #endif /* SUPPORT_OLD_REFLECTION */ 4275 4276 // Atomic /////////////////////////////////////////////////////////////////////////////////////////// 4277 4278 JVM_LEAF(jboolean, JVM_SupportsCX8()) 4279 JVMWrapper("JVM_SupportsCX8"); 4280 return VM_Version::supports_cx8(); 4281 JVM_END 4282 4283 4284 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal)) 4285 JVMWrapper("JVM_CX8Field"); 4286 jlong res; 4287 oop o = JNIHandles::resolve(obj); 4288 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); 4289 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs); 4290 4291 assert(VM_Version::supports_cx8(), "cx8 not supported"); 4292 res = Atomic::cmpxchg(newVal, addr, oldVal); 4293 4294 return res == oldVal; 4295 JVM_END 4296 4297 // DTrace /////////////////////////////////////////////////////////////////// 4298 4299 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env)) 4300 JVMWrapper("JVM_DTraceGetVersion"); 4301 return (jint)JVM_TRACING_DTRACE_VERSION; 4302 JVM_END 4303 4304 JVM_ENTRY(jlong,JVM_DTraceActivate( 4305 JNIEnv* env, jint version, jstring module_name, jint providers_count, 4306 JVM_DTraceProvider* providers)) 4307 JVMWrapper("JVM_DTraceActivate"); 4308 return DTraceJSDT::activate( 4309 version, module_name, providers_count, providers, CHECK_0); 4310 JVM_END 4311 4312 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method)) 4313 JVMWrapper("JVM_DTraceIsProbeEnabled"); 4314 return DTraceJSDT::is_probe_enabled(method); 4315 JVM_END 4316 4317 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle)) 4318 JVMWrapper("JVM_DTraceDispose"); 4319 DTraceJSDT::dispose(handle); 4320 JVM_END 4321 4322 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env)) 4323 JVMWrapper("JVM_DTraceIsSupported"); 4324 return DTraceJSDT::is_supported(); 4325 JVM_END 4326 4327 // Returns an array of all live Thread objects (VM internal JavaThreads, 4328 // jvmti agent threads, and JNI attaching threads are skipped) 4329 // See CR 6404306 regarding JNI attaching threads 4330 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy)) 4331 ResourceMark rm(THREAD); 4332 ThreadsListEnumerator tle(THREAD, false, false); 4333 JvmtiVMObjectAllocEventCollector oam; 4334 4335 int num_threads = tle.num_threads(); 4336 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL); 4337 objArrayHandle threads_ah(THREAD, r); 4338 4339 for (int i = 0; i < num_threads; i++) { 4340 Handle h = tle.get_threadObj(i); 4341 threads_ah->obj_at_put(i, h()); 4342 } 4343 4344 return (jobjectArray) JNIHandles::make_local(env, threads_ah()); 4345 JVM_END 4346 4347 4348 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods 4349 // Return StackTraceElement[][], each element is the stack trace of a thread in 4350 // the corresponding entry in the given threads array 4351 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads)) 4352 JVMWrapper("JVM_DumpThreads"); 4353 JvmtiVMObjectAllocEventCollector oam; 4354 4355 // Check if threads is null 4356 if (threads == NULL) { 4357 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 4358 } 4359 4360 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads)); 4361 objArrayHandle ah(THREAD, a); 4362 int num_threads = ah->length(); 4363 // check if threads is non-empty array 4364 if (num_threads == 0) { 4365 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); 4366 } 4367 4368 // check if threads is not an array of objects of Thread class 4369 klassOop k = objArrayKlass::cast(ah->klass())->element_klass(); 4370 if (k != SystemDictionary::Thread_klass()) { 4371 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); 4372 } 4373 4374 ResourceMark rm(THREAD); 4375 4376 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); 4377 for (int i = 0; i < num_threads; i++) { 4378 oop thread_obj = ah->obj_at(i); 4379 instanceHandle h(THREAD, (instanceOop) thread_obj); 4380 thread_handle_array->append(h); 4381 } 4382 4383 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL); 4384 return (jobjectArray)JNIHandles::make_local(env, stacktraces()); 4385 4386 JVM_END 4387 4388 // JVM monitoring and management support 4389 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version)) 4390 return Management::get_jmm_interface(version); 4391 JVM_END 4392 4393 // com.sun.tools.attach.VirtualMachine agent properties support 4394 // 4395 // Initialize the agent properties with the properties maintained in the VM 4396 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties)) 4397 JVMWrapper("JVM_InitAgentProperties"); 4398 ResourceMark rm; 4399 4400 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); 4401 4402 PUTPROP(props, "sun.java.command", Arguments::java_command()); 4403 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags()); 4404 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args()); 4405 return properties; 4406 JVM_END 4407 4408 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass)) 4409 { 4410 JVMWrapper("JVM_GetEnclosingMethodInfo"); 4411 JvmtiVMObjectAllocEventCollector oam; 4412 4413 if (ofClass == NULL) { 4414 return NULL; 4415 } 4416 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass)); 4417 // Special handling for primitive objects 4418 if (java_lang_Class::is_primitive(mirror())) { 4419 return NULL; 4420 } 4421 klassOop k = java_lang_Class::as_klassOop(mirror()); 4422 if (!Klass::cast(k)->oop_is_instance()) { 4423 return NULL; 4424 } 4425 instanceKlassHandle ik_h(THREAD, k); 4426 int encl_method_class_idx = ik_h->enclosing_method_class_index(); 4427 if (encl_method_class_idx == 0) { 4428 return NULL; 4429 } 4430 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL); 4431 objArrayHandle dest(THREAD, dest_o); 4432 klassOop enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL); 4433 dest->obj_at_put(0, Klass::cast(enc_k)->java_mirror()); 4434 int encl_method_method_idx = ik_h->enclosing_method_method_index(); 4435 if (encl_method_method_idx != 0) { 4436 symbolOop sym_o = ik_h->constants()->symbol_at( 4437 extract_low_short_from_int( 4438 ik_h->constants()->name_and_type_at(encl_method_method_idx))); 4439 symbolHandle sym(THREAD, sym_o); 4440 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 4441 dest->obj_at_put(1, str()); 4442 sym_o = ik_h->constants()->symbol_at( 4443 extract_high_short_from_int( 4444 ik_h->constants()->name_and_type_at(encl_method_method_idx))); 4445 sym = symbolHandle(THREAD, sym_o); 4446 str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 4447 dest->obj_at_put(2, str()); 4448 } 4449 return (jobjectArray) JNIHandles::make_local(dest()); 4450 } 4451 JVM_END 4452 4453 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env, 4454 jint javaThreadState)) 4455 { 4456 // If new thread states are added in future JDK and VM versions, 4457 // this should check if the JDK version is compatible with thread 4458 // states supported by the VM. Return NULL if not compatible. 4459 // 4460 // This function must map the VM java_lang_Thread::ThreadStatus 4461 // to the Java thread state that the JDK supports. 4462 // 4463 4464 typeArrayHandle values_h; 4465 switch (javaThreadState) { 4466 case JAVA_THREAD_STATE_NEW : { 4467 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4468 values_h = typeArrayHandle(THREAD, r); 4469 values_h->int_at_put(0, java_lang_Thread::NEW); 4470 break; 4471 } 4472 case JAVA_THREAD_STATE_RUNNABLE : { 4473 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4474 values_h = typeArrayHandle(THREAD, r); 4475 values_h->int_at_put(0, java_lang_Thread::RUNNABLE); 4476 break; 4477 } 4478 case JAVA_THREAD_STATE_BLOCKED : { 4479 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4480 values_h = typeArrayHandle(THREAD, r); 4481 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER); 4482 break; 4483 } 4484 case JAVA_THREAD_STATE_WAITING : { 4485 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL); 4486 values_h = typeArrayHandle(THREAD, r); 4487 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT); 4488 values_h->int_at_put(1, java_lang_Thread::PARKED); 4489 break; 4490 } 4491 case JAVA_THREAD_STATE_TIMED_WAITING : { 4492 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL); 4493 values_h = typeArrayHandle(THREAD, r); 4494 values_h->int_at_put(0, java_lang_Thread::SLEEPING); 4495 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED); 4496 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED); 4497 break; 4498 } 4499 case JAVA_THREAD_STATE_TERMINATED : { 4500 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4501 values_h = typeArrayHandle(THREAD, r); 4502 values_h->int_at_put(0, java_lang_Thread::TERMINATED); 4503 break; 4504 } 4505 default: 4506 // Unknown state - probably incompatible JDK version 4507 return NULL; 4508 } 4509 4510 return (jintArray) JNIHandles::make_local(env, values_h()); 4511 } 4512 JVM_END 4513 4514 4515 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env, 4516 jint javaThreadState, 4517 jintArray values)) 4518 { 4519 // If new thread states are added in future JDK and VM versions, 4520 // this should check if the JDK version is compatible with thread 4521 // states supported by the VM. Return NULL if not compatible. 4522 // 4523 // This function must map the VM java_lang_Thread::ThreadStatus 4524 // to the Java thread state that the JDK supports. 4525 // 4526 4527 ResourceMark rm; 4528 4529 // Check if threads is null 4530 if (values == NULL) { 4531 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 4532 } 4533 4534 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values)); 4535 typeArrayHandle values_h(THREAD, v); 4536 4537 objArrayHandle names_h; 4538 switch (javaThreadState) { 4539 case JAVA_THREAD_STATE_NEW : { 4540 assert(values_h->length() == 1 && 4541 values_h->int_at(0) == java_lang_Thread::NEW, 4542 "Invalid threadStatus value"); 4543 4544 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4545 1, /* only 1 substate */ 4546 CHECK_NULL); 4547 names_h = objArrayHandle(THREAD, r); 4548 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL); 4549 names_h->obj_at_put(0, name()); 4550 break; 4551 } 4552 case JAVA_THREAD_STATE_RUNNABLE : { 4553 assert(values_h->length() == 1 && 4554 values_h->int_at(0) == java_lang_Thread::RUNNABLE, 4555 "Invalid threadStatus value"); 4556 4557 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4558 1, /* only 1 substate */ 4559 CHECK_NULL); 4560 names_h = objArrayHandle(THREAD, r); 4561 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL); 4562 names_h->obj_at_put(0, name()); 4563 break; 4564 } 4565 case JAVA_THREAD_STATE_BLOCKED : { 4566 assert(values_h->length() == 1 && 4567 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER, 4568 "Invalid threadStatus value"); 4569 4570 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4571 1, /* only 1 substate */ 4572 CHECK_NULL); 4573 names_h = objArrayHandle(THREAD, r); 4574 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL); 4575 names_h->obj_at_put(0, name()); 4576 break; 4577 } 4578 case JAVA_THREAD_STATE_WAITING : { 4579 assert(values_h->length() == 2 && 4580 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT && 4581 values_h->int_at(1) == java_lang_Thread::PARKED, 4582 "Invalid threadStatus value"); 4583 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4584 2, /* number of substates */ 4585 CHECK_NULL); 4586 names_h = objArrayHandle(THREAD, r); 4587 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT", 4588 CHECK_NULL); 4589 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED", 4590 CHECK_NULL); 4591 names_h->obj_at_put(0, name0()); 4592 names_h->obj_at_put(1, name1()); 4593 break; 4594 } 4595 case JAVA_THREAD_STATE_TIMED_WAITING : { 4596 assert(values_h->length() == 3 && 4597 values_h->int_at(0) == java_lang_Thread::SLEEPING && 4598 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED && 4599 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED, 4600 "Invalid threadStatus value"); 4601 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4602 3, /* number of substates */ 4603 CHECK_NULL); 4604 names_h = objArrayHandle(THREAD, r); 4605 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING", 4606 CHECK_NULL); 4607 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT", 4608 CHECK_NULL); 4609 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED", 4610 CHECK_NULL); 4611 names_h->obj_at_put(0, name0()); 4612 names_h->obj_at_put(1, name1()); 4613 names_h->obj_at_put(2, name2()); 4614 break; 4615 } 4616 case JAVA_THREAD_STATE_TERMINATED : { 4617 assert(values_h->length() == 1 && 4618 values_h->int_at(0) == java_lang_Thread::TERMINATED, 4619 "Invalid threadStatus value"); 4620 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4621 1, /* only 1 substate */ 4622 CHECK_NULL); 4623 names_h = objArrayHandle(THREAD, r); 4624 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL); 4625 names_h->obj_at_put(0, name()); 4626 break; 4627 } 4628 default: 4629 // Unknown state - probably incompatible JDK version 4630 return NULL; 4631 } 4632 return (jobjectArray) JNIHandles::make_local(env, names_h()); 4633 } 4634 JVM_END 4635 4636 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size)) 4637 { 4638 memset(info, 0, sizeof(info_size)); 4639 4640 info->jvm_version = Abstract_VM_Version::jvm_version(); 4641 info->update_version = 0; /* 0 in HotSpot Express VM */ 4642 info->special_update_version = 0; /* 0 in HotSpot Express VM */ 4643 4644 // when we add a new capability in the jvm_version_info struct, we should also 4645 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat 4646 // counter defined in runtimeService.cpp. 4647 info->is_attachable = AttachListener::is_attach_supported(); 4648 #ifdef KERNEL 4649 info->is_kernel_jvm = 1; // true; 4650 #else // KERNEL 4651 info->is_kernel_jvm = 0; // false; 4652 #endif // KERNEL 4653 } 4654 JVM_END