jvm.cpp revision 513:2328d1d3f8cf
1/* 2 * Copyright 1997-2008 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 * 23 */ 24 25#include "incls/_precompiled.incl" 26#include "incls/_jvm.cpp.incl" 27#include <errno.h> 28 29/* 30 NOTE about use of any ctor or function call that can trigger a safepoint/GC: 31 such ctors and calls MUST NOT come between an oop declaration/init and its 32 usage because if objects are move this may cause various memory stomps, bus 33 errors and segfaults. Here is a cookbook for causing so called "naked oop 34 failures": 35 36 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> { 37 JVMWrapper("JVM_GetClassDeclaredFields"); 38 39 // Object address to be held directly in mirror & not visible to GC 40 oop mirror = JNIHandles::resolve_non_null(ofClass); 41 42 // If this ctor can hit a safepoint, moving objects around, then 43 ComplexConstructor foo; 44 45 // Boom! mirror may point to JUNK instead of the intended object 46 (some dereference of mirror) 47 48 // Here's another call that may block for GC, making mirror stale 49 MutexLocker ml(some_lock); 50 51 // And here's an initializer that can result in a stale oop 52 // all in one step. 53 oop o = call_that_can_throw_exception(TRAPS); 54 55 56 The solution is to keep the oop declaration BELOW the ctor or function 57 call that might cause a GC, do another resolve to reassign the oop, or 58 consider use of a Handle instead of an oop so there is immunity from object 59 motion. But note that the "QUICK" entries below do not have a handlemark 60 and thus can only support use of handles passed in. 61*/ 62 63static void trace_class_resolution_impl(klassOop to_class, TRAPS) { 64 ResourceMark rm; 65 int line_number = -1; 66 const char * source_file = NULL; 67 klassOop caller = NULL; 68 JavaThread* jthread = JavaThread::current(); 69 if (jthread->has_last_Java_frame()) { 70 vframeStream vfst(jthread); 71 72 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames 73 symbolHandle access_controller = oopFactory::new_symbol_handle("java/security/AccessController", CHECK); 74 klassOop access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK); 75 symbolHandle privileged_action = oopFactory::new_symbol_handle("java/security/PrivilegedAction", CHECK); 76 klassOop privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK); 77 78 methodOop last_caller = NULL; 79 80 while (!vfst.at_end()) { 81 methodOop m = vfst.method(); 82 if (!vfst.method()->method_holder()->klass_part()->is_subclass_of(SystemDictionary::classloader_klass())&& 83 !vfst.method()->method_holder()->klass_part()->is_subclass_of(access_controller_klass) && 84 !vfst.method()->method_holder()->klass_part()->is_subclass_of(privileged_action_klass)) { 85 break; 86 } 87 last_caller = m; 88 vfst.next(); 89 } 90 // if this is called from Class.forName0 and that is called from Class.forName, 91 // then print the caller of Class.forName. If this is Class.loadClass, then print 92 // that caller, otherwise keep quiet since this should be picked up elsewhere. 93 bool found_it = false; 94 if (!vfst.at_end() && 95 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() && 96 vfst.method()->name() == vmSymbols::forName0_name()) { 97 vfst.next(); 98 if (!vfst.at_end() && 99 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() && 100 vfst.method()->name() == vmSymbols::forName_name()) { 101 vfst.next(); 102 found_it = true; 103 } 104 } else if (last_caller != NULL && 105 instanceKlass::cast(last_caller->method_holder())->name() == 106 vmSymbols::java_lang_ClassLoader() && 107 (last_caller->name() == vmSymbols::loadClassInternal_name() || 108 last_caller->name() == vmSymbols::loadClass_name())) { 109 found_it = true; 110 } 111 if (found_it && !vfst.at_end()) { 112 // found the caller 113 caller = vfst.method()->method_holder(); 114 line_number = vfst.method()->line_number_from_bci(vfst.bci()); 115 symbolOop s = instanceKlass::cast(vfst.method()->method_holder())->source_file_name(); 116 if (s != NULL) { 117 source_file = s->as_C_string(); 118 } 119 } 120 } 121 if (caller != NULL) { 122 if (to_class != caller) { 123 const char * from = Klass::cast(caller)->external_name(); 124 const char * to = Klass::cast(to_class)->external_name(); 125 // print in a single call to reduce interleaving between threads 126 if (source_file != NULL) { 127 tty->print("RESOLVE %s %s %s:%d (explicit)\n", from, to, source_file, line_number); 128 } else { 129 tty->print("RESOLVE %s %s (explicit)\n", from, to); 130 } 131 } 132 } 133} 134 135static void trace_class_resolution(klassOop to_class) { 136 EXCEPTION_MARK; 137 trace_class_resolution_impl(to_class, THREAD); 138 if (HAS_PENDING_EXCEPTION) { 139 CLEAR_PENDING_EXCEPTION; 140 } 141} 142 143// Wrapper to trace JVM functions 144 145#ifdef ASSERT 146 class JVMTraceWrapper : public StackObj { 147 public: 148 JVMTraceWrapper(const char* format, ...) { 149 if (TraceJVMCalls) { 150 va_list ap; 151 va_start(ap, format); 152 tty->print("JVM "); 153 tty->vprint_cr(format, ap); 154 va_end(ap); 155 } 156 } 157 }; 158 159 Histogram* JVMHistogram; 160 volatile jint JVMHistogram_lock = 0; 161 162 class JVMHistogramElement : public HistogramElement { 163 public: 164 JVMHistogramElement(const char* name); 165 }; 166 167 JVMHistogramElement::JVMHistogramElement(const char* elementName) { 168 _name = elementName; 169 uintx count = 0; 170 171 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) { 172 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) { 173 count +=1; 174 if ( (WarnOnStalledSpinLock > 0) 175 && (count % WarnOnStalledSpinLock == 0)) { 176 warning("JVMHistogram_lock seems to be stalled"); 177 } 178 } 179 } 180 181 if(JVMHistogram == NULL) 182 JVMHistogram = new Histogram("JVM Call Counts",100); 183 184 JVMHistogram->add_element(this); 185 Atomic::dec(&JVMHistogram_lock); 186 } 187 188 #define JVMCountWrapper(arg) \ 189 static JVMHistogramElement* e = new JVMHistogramElement(arg); \ 190 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen! 191 192 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1) 193 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2) 194 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3) 195 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4) 196#else 197 #define JVMWrapper(arg1) 198 #define JVMWrapper2(arg1, arg2) 199 #define JVMWrapper3(arg1, arg2, arg3) 200 #define JVMWrapper4(arg1, arg2, arg3, arg4) 201#endif 202 203 204// Interface version ///////////////////////////////////////////////////////////////////// 205 206 207JVM_LEAF(jint, JVM_GetInterfaceVersion()) 208 return JVM_INTERFACE_VERSION; 209JVM_END 210 211 212// java.lang.System ////////////////////////////////////////////////////////////////////// 213 214 215JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored)) 216 JVMWrapper("JVM_CurrentTimeMillis"); 217 return os::javaTimeMillis(); 218JVM_END 219 220JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored)) 221 JVMWrapper("JVM_NanoTime"); 222 return os::javaTimeNanos(); 223JVM_END 224 225 226JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos, 227 jobject dst, jint dst_pos, jint length)) 228 JVMWrapper("JVM_ArrayCopy"); 229 // Check if we have null pointers 230 if (src == NULL || dst == NULL) { 231 THROW(vmSymbols::java_lang_NullPointerException()); 232 } 233 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src)); 234 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst)); 235 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop"); 236 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop"); 237 // Do copy 238 Klass::cast(s->klass())->copy_array(s, src_pos, d, dst_pos, length, thread); 239JVM_END 240 241 242static void set_property(Handle props, const char* key, const char* value, TRAPS) { 243 JavaValue r(T_OBJECT); 244 // public synchronized Object put(Object key, Object value); 245 HandleMark hm(THREAD); 246 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK); 247 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK); 248 JavaCalls::call_virtual(&r, 249 props, 250 KlassHandle(THREAD, SystemDictionary::properties_klass()), 251 vmSymbolHandles::put_name(), 252 vmSymbolHandles::object_object_object_signature(), 253 key_str, 254 value_str, 255 THREAD); 256} 257 258 259#define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties)); 260 261 262JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties)) 263 JVMWrapper("JVM_InitProperties"); 264 ResourceMark rm; 265 266 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); 267 268 // System property list includes both user set via -D option and 269 // jvm system specific properties. 270 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { 271 PUTPROP(props, p->key(), p->value()); 272 } 273 274 // Convert the -XX:MaxDirectMemorySize= command line flag 275 // to the sun.nio.MaxDirectMemorySize property. 276 // Do this after setting user properties to prevent people 277 // from setting the value with a -D option, as requested. 278 { 279 char as_chars[256]; 280 jio_snprintf(as_chars, sizeof(as_chars), INTX_FORMAT, MaxDirectMemorySize); 281 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars); 282 } 283 284 // JVM monitoring and management support 285 // Add the sun.management.compiler property for the compiler's name 286 { 287#undef CSIZE 288#if defined(_LP64) || defined(_WIN64) 289 #define CSIZE "64-Bit " 290#else 291 #define CSIZE 292#endif // 64bit 293 294#ifdef TIERED 295 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers"; 296#else 297#if defined(COMPILER1) 298 const char* compiler_name = "HotSpot " CSIZE "Client Compiler"; 299#elif defined(COMPILER2) 300 const char* compiler_name = "HotSpot " CSIZE "Server Compiler"; 301#else 302 const char* compiler_name = ""; 303#endif // compilers 304#endif // TIERED 305 306 if (*compiler_name != '\0' && 307 (Arguments::mode() != Arguments::_int)) { 308 PUTPROP(props, "sun.management.compiler", compiler_name); 309 } 310 } 311 312 return properties; 313JVM_END 314 315 316// java.lang.Runtime ///////////////////////////////////////////////////////////////////////// 317 318extern volatile jint vm_created; 319 320JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code)) 321 if (vm_created != 0 && (code == 0)) { 322 // The VM is about to exit. We call back into Java to check whether finalizers should be run 323 Universe::run_finalizers_on_exit(); 324 } 325 before_exit(thread); 326 vm_exit(code); 327JVM_END 328 329 330JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code)) 331 before_exit(thread); 332 vm_exit(code); 333JVM_END 334 335 336JVM_LEAF(void, JVM_OnExit(void (*func)(void))) 337 register_on_exit_function(func); 338JVM_END 339 340 341JVM_ENTRY_NO_ENV(void, JVM_GC(void)) 342 JVMWrapper("JVM_GC"); 343 if (!DisableExplicitGC) { 344 Universe::heap()->collect(GCCause::_java_lang_system_gc); 345 } 346JVM_END 347 348 349JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void)) 350 JVMWrapper("JVM_MaxObjectInspectionAge"); 351 return Universe::heap()->millis_since_last_gc(); 352JVM_END 353 354 355JVM_LEAF(void, JVM_TraceInstructions(jboolean on)) 356 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported"); 357JVM_END 358 359 360JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on)) 361 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported"); 362JVM_END 363 364static inline jlong convert_size_t_to_jlong(size_t val) { 365 // In the 64-bit vm, a size_t can overflow a jlong (which is signed). 366 NOT_LP64 (return (jlong)val;) 367 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);) 368} 369 370JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void)) 371 JVMWrapper("JVM_TotalMemory"); 372 size_t n = Universe::heap()->capacity(); 373 return convert_size_t_to_jlong(n); 374JVM_END 375 376 377JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void)) 378 JVMWrapper("JVM_FreeMemory"); 379 CollectedHeap* ch = Universe::heap(); 380 size_t n; 381 { 382 MutexLocker x(Heap_lock); 383 n = ch->capacity() - ch->used(); 384 } 385 return convert_size_t_to_jlong(n); 386JVM_END 387 388 389JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void)) 390 JVMWrapper("JVM_MaxMemory"); 391 size_t n = Universe::heap()->max_capacity(); 392 return convert_size_t_to_jlong(n); 393JVM_END 394 395 396JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void)) 397 JVMWrapper("JVM_ActiveProcessorCount"); 398 return os::active_processor_count(); 399JVM_END 400 401 402 403// java.lang.Throwable ////////////////////////////////////////////////////// 404 405 406JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver)) 407 JVMWrapper("JVM_FillInStackTrace"); 408 Handle exception(thread, JNIHandles::resolve_non_null(receiver)); 409 java_lang_Throwable::fill_in_stack_trace(exception); 410JVM_END 411 412 413JVM_ENTRY(void, JVM_PrintStackTrace(JNIEnv *env, jobject receiver, jobject printable)) 414 JVMWrapper("JVM_PrintStackTrace"); 415 // Note: This is no longer used in Merlin, but we still support it for compatibility. 416 oop exception = JNIHandles::resolve_non_null(receiver); 417 oop stream = JNIHandles::resolve_non_null(printable); 418 java_lang_Throwable::print_stack_trace(exception, stream); 419JVM_END 420 421 422JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable)) 423 JVMWrapper("JVM_GetStackTraceDepth"); 424 oop exception = JNIHandles::resolve(throwable); 425 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD); 426JVM_END 427 428 429JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index)) 430 JVMWrapper("JVM_GetStackTraceElement"); 431 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC 432 oop exception = JNIHandles::resolve(throwable); 433 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL); 434 return JNIHandles::make_local(env, element); 435JVM_END 436 437 438// java.lang.Object /////////////////////////////////////////////// 439 440 441JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle)) 442 JVMWrapper("JVM_IHashCode"); 443 // as implemented in the classic virtual machine; return 0 if object is NULL 444 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ; 445JVM_END 446 447 448JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms)) 449 JVMWrapper("JVM_MonitorWait"); 450 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 451 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorWait must apply to an object"); 452 JavaThreadInObjectWaitState jtiows(thread, ms != 0); 453 if (JvmtiExport::should_post_monitor_wait()) { 454 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms); 455 } 456 ObjectSynchronizer::wait(obj, ms, CHECK); 457JVM_END 458 459 460JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle)) 461 JVMWrapper("JVM_MonitorNotify"); 462 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 463 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotify must apply to an object"); 464 ObjectSynchronizer::notify(obj, CHECK); 465JVM_END 466 467 468JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle)) 469 JVMWrapper("JVM_MonitorNotifyAll"); 470 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 471 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotifyAll must apply to an object"); 472 ObjectSynchronizer::notifyall(obj, CHECK); 473JVM_END 474 475 476JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle)) 477 JVMWrapper("JVM_Clone"); 478 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 479 const KlassHandle klass (THREAD, obj->klass()); 480 JvmtiVMObjectAllocEventCollector oam; 481 482#ifdef ASSERT 483 // Just checking that the cloneable flag is set correct 484 if (obj->is_javaArray()) { 485 guarantee(klass->is_cloneable(), "all arrays are cloneable"); 486 } else { 487 guarantee(obj->is_instance(), "should be instanceOop"); 488 bool cloneable = klass->is_subtype_of(SystemDictionary::cloneable_klass()); 489 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag"); 490 } 491#endif 492 493 // Check if class of obj supports the Cloneable interface. 494 // All arrays are considered to be cloneable (See JLS 20.1.5) 495 if (!klass->is_cloneable()) { 496 ResourceMark rm(THREAD); 497 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name()); 498 } 499 500 // Make shallow object copy 501 const int size = obj->size(); 502 oop new_obj = NULL; 503 if (obj->is_javaArray()) { 504 const int length = ((arrayOop)obj())->length(); 505 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL); 506 } else { 507 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL); 508 } 509 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread 510 // is modifying a reference field in the clonee, a non-oop-atomic copy might 511 // be suspended in the middle of copying the pointer and end up with parts 512 // of two different pointers in the field. Subsequent dereferences will crash. 513 // 4846409: an oop-copy of objects with long or double fields or arrays of same 514 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead 515 // of oops. We know objects are aligned on a minimum of an jlong boundary. 516 // The same is true of StubRoutines::object_copy and the various oop_copy 517 // variants, and of the code generated by the inline_native_clone intrinsic. 518 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned"); 519 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj, 520 (size_t)align_object_size(size) / HeapWordsPerLong); 521 // Clear the header 522 new_obj->init_mark(); 523 524 // Store check (mark entire object and let gc sort it out) 525 BarrierSet* bs = Universe::heap()->barrier_set(); 526 assert(bs->has_write_region_opt(), "Barrier set does not have write_region"); 527 bs->write_region(MemRegion((HeapWord*)new_obj, size)); 528 529 // Caution: this involves a java upcall, so the clone should be 530 // "gc-robust" by this stage. 531 if (klass->has_finalizer()) { 532 assert(obj->is_instance(), "should be instanceOop"); 533 new_obj = instanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL); 534 } 535 536 return JNIHandles::make_local(env, oop(new_obj)); 537JVM_END 538 539// java.lang.Compiler //////////////////////////////////////////////////// 540 541// The initial cuts of the HotSpot VM will not support JITs, and all existing 542// JITs would need extensive changes to work with HotSpot. The JIT-related JVM 543// functions are all silently ignored unless JVM warnings are printed. 544 545JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls)) 546 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported"); 547JVM_END 548 549 550JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls)) 551 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported"); 552 return JNI_FALSE; 553JVM_END 554 555 556JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls)) 557 if (PrintJVMWarnings) warning("JVM_CompileClass not supported"); 558 return JNI_FALSE; 559JVM_END 560 561 562JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname)) 563 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported"); 564 return JNI_FALSE; 565JVM_END 566 567 568JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg)) 569 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported"); 570 return NULL; 571JVM_END 572 573 574JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls)) 575 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported"); 576JVM_END 577 578 579JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls)) 580 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported"); 581JVM_END 582 583 584 585// Error message support ////////////////////////////////////////////////////// 586 587JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len)) 588 JVMWrapper("JVM_GetLastErrorString"); 589 return hpi::lasterror(buf, len); 590JVM_END 591 592 593// java.io.File /////////////////////////////////////////////////////////////// 594 595JVM_LEAF(char*, JVM_NativePath(char* path)) 596 JVMWrapper2("JVM_NativePath (%s)", path); 597 return hpi::native_path(path); 598JVM_END 599 600 601// Misc. class handling /////////////////////////////////////////////////////////// 602 603 604JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth)) 605 JVMWrapper("JVM_GetCallerClass"); 606 klassOop k = thread->security_get_caller_class(depth); 607 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); 608JVM_END 609 610 611JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf)) 612 JVMWrapper("JVM_FindPrimitiveClass"); 613 oop mirror = NULL; 614 BasicType t = name2type(utf); 615 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) { 616 mirror = Universe::java_mirror(t); 617 } 618 if (mirror == NULL) { 619 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf); 620 } else { 621 return (jclass) JNIHandles::make_local(env, mirror); 622 } 623JVM_END 624 625 626JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls)) 627 JVMWrapper("JVM_ResolveClass"); 628 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented"); 629JVM_END 630 631// Common implementation for JVM_FindClassFromBootLoader and 632// JVM_FindClassFromLoader 633static jclass jvm_find_class_from_class_loader(JNIEnv* env, const char* name, 634 jboolean init, jobject loader, 635 jboolean throwError, TRAPS) { 636 // Java libraries should ensure that name is never null... 637 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) { 638 // It's impossible to create this class; the name cannot fit 639 // into the constant pool. 640 if (throwError) { 641 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 642 } else { 643 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name); 644 } 645 } 646 symbolHandle h_name = oopFactory::new_symbol_handle(name, CHECK_NULL); 647 Handle h_loader(THREAD, JNIHandles::resolve(loader)); 648 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, 649 Handle(), throwError, THREAD); 650 651 if (TraceClassResolution && result != NULL) { 652 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result))); 653 } 654 return result; 655} 656 657// Rationale behind JVM_FindClassFromBootLoader 658// a> JVM_FindClassFromClassLoader was never exported in the export tables. 659// b> because of (a) java.dll has a direct dependecy on the unexported 660// private symbol "_JVM_FindClassFromClassLoader@20". 661// c> the launcher cannot use the private symbol as it dynamically opens 662// the entry point, so if something changes, the launcher will fail 663// unexpectedly at runtime, it is safest for the launcher to dlopen a 664// stable exported interface. 665// d> re-exporting JVM_FindClassFromClassLoader as public, will cause its 666// signature to change from _JVM_FindClassFromClassLoader@20 to 667// JVM_FindClassFromClassLoader and will not be backward compatible 668// with older JDKs. 669// Thus a public/stable exported entry point is the right solution, 670// public here means public in linker semantics, and is exported only 671// to the JDK, and is not intended to be a public API. 672 673JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env, 674 const char* name, 675 jboolean throwError)) 676 JVMWrapper3("JVM_FindClassFromBootLoader %s throw %s", name, 677 throwError ? "error" : "exception"); 678 return jvm_find_class_from_class_loader(env, name, JNI_FALSE, 679 (jobject)NULL, throwError, THREAD); 680JVM_END 681 682JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name, 683 jboolean init, jobject loader, 684 jboolean throwError)) 685 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name, 686 throwError ? "error" : "exception"); 687 return jvm_find_class_from_class_loader(env, name, init, loader, 688 throwError, THREAD); 689JVM_END 690 691 692JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name, 693 jboolean init, jclass from)) 694 JVMWrapper2("JVM_FindClassFromClass %s", name); 695 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) { 696 // It's impossible to create this class; the name cannot fit 697 // into the constant pool. 698 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 699 } 700 symbolHandle h_name = oopFactory::new_symbol_handle(name, CHECK_NULL); 701 oop from_class_oop = JNIHandles::resolve(from); 702 klassOop from_class = (from_class_oop == NULL) 703 ? (klassOop)NULL 704 : java_lang_Class::as_klassOop(from_class_oop); 705 oop class_loader = NULL; 706 oop protection_domain = NULL; 707 if (from_class != NULL) { 708 class_loader = Klass::cast(from_class)->class_loader(); 709 protection_domain = Klass::cast(from_class)->protection_domain(); 710 } 711 Handle h_loader(THREAD, class_loader); 712 Handle h_prot (THREAD, protection_domain); 713 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, 714 h_prot, true, thread); 715 716 if (TraceClassResolution && result != NULL) { 717 // this function is generally only used for class loading during verification. 718 ResourceMark rm; 719 oop from_mirror = JNIHandles::resolve_non_null(from); 720 klassOop from_class = java_lang_Class::as_klassOop(from_mirror); 721 const char * from_name = Klass::cast(from_class)->external_name(); 722 723 oop mirror = JNIHandles::resolve_non_null(result); 724 klassOop to_class = java_lang_Class::as_klassOop(mirror); 725 const char * to = Klass::cast(to_class)->external_name(); 726 tty->print("RESOLVE %s %s (verification)\n", from_name, to); 727 } 728 729 return result; 730JVM_END 731 732static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) { 733 if (loader.is_null()) { 734 return; 735 } 736 737 // check whether the current caller thread holds the lock or not. 738 // If not, increment the corresponding counter 739 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) != 740 ObjectSynchronizer::owner_self) { 741 counter->inc(); 742 } 743} 744 745// common code for JVM_DefineClass() and JVM_DefineClassWithSource() 746static jclass jvm_define_class_common(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source, TRAPS) { 747 if (source == NULL) source = "__JVM_DefineClass__"; 748 749 // Since exceptions can be thrown, class initialization can take place 750 // if name is NULL no check for class name in .class stream has to be made. 751 symbolHandle class_name; 752 if (name != NULL) { 753 const int str_len = (int)strlen(name); 754 if (str_len > symbolOopDesc::max_length()) { 755 // It's impossible to create this class; the name cannot fit 756 // into the constant pool. 757 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 758 } 759 class_name = oopFactory::new_symbol_handle(name, str_len, CHECK_NULL); 760 } 761 762 ResourceMark rm(THREAD); 763 ClassFileStream st((u1*) buf, len, (char *)source); 764 Handle class_loader (THREAD, JNIHandles::resolve(loader)); 765 if (UsePerfData) { 766 is_lock_held_by_thread(class_loader, 767 ClassLoader::sync_JVMDefineClassLockFreeCounter(), 768 THREAD); 769 } 770 Handle protection_domain (THREAD, JNIHandles::resolve(pd)); 771 klassOop k = SystemDictionary::resolve_from_stream(class_name, class_loader, 772 protection_domain, &st, 773 CHECK_NULL); 774 775 if (TraceClassResolution && k != NULL) { 776 trace_class_resolution(k); 777 } 778 779 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); 780} 781 782 783JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd)) 784 JVMWrapper2("JVM_DefineClass %s", name); 785 786 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, THREAD); 787JVM_END 788 789 790JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source)) 791 JVMWrapper2("JVM_DefineClassWithSource %s", name); 792 793 return jvm_define_class_common(env, name, loader, buf, len, pd, source, THREAD); 794JVM_END 795 796 797JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name)) 798 JVMWrapper("JVM_FindLoadedClass"); 799 ResourceMark rm(THREAD); 800 801 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); 802 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL); 803 804 const char* str = java_lang_String::as_utf8_string(string()); 805 // Sanity check, don't expect null 806 if (str == NULL) return NULL; 807 808 const int str_len = (int)strlen(str); 809 if (str_len > symbolOopDesc::max_length()) { 810 // It's impossible to create this class; the name cannot fit 811 // into the constant pool. 812 return NULL; 813 } 814 symbolHandle klass_name = oopFactory::new_symbol_handle(str, str_len,CHECK_NULL); 815 816 // Security Note: 817 // The Java level wrapper will perform the necessary security check allowing 818 // us to pass the NULL as the initiating class loader. 819 Handle h_loader(THREAD, JNIHandles::resolve(loader)); 820 if (UsePerfData) { 821 is_lock_held_by_thread(h_loader, 822 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(), 823 THREAD); 824 } 825 826 klassOop k = SystemDictionary::find_instance_or_array_klass(klass_name, 827 h_loader, 828 Handle(), 829 CHECK_NULL); 830 831 return (k == NULL) ? NULL : 832 (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); 833JVM_END 834 835 836// Reflection support ////////////////////////////////////////////////////////////////////////////// 837 838JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls)) 839 assert (cls != NULL, "illegal class"); 840 JVMWrapper("JVM_GetClassName"); 841 JvmtiVMObjectAllocEventCollector oam; 842 ResourceMark rm(THREAD); 843 const char* name; 844 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 845 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls))); 846 } else { 847 // Consider caching interned string in Klass 848 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); 849 assert(k->is_klass(), "just checking"); 850 name = Klass::cast(k)->external_name(); 851 } 852 oop result = StringTable::intern((char*) name, CHECK_NULL); 853 return (jstring) JNIHandles::make_local(env, result); 854JVM_END 855 856 857JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls)) 858 JVMWrapper("JVM_GetClassInterfaces"); 859 JvmtiVMObjectAllocEventCollector oam; 860 oop mirror = JNIHandles::resolve_non_null(cls); 861 862 // Special handling for primitive objects 863 if (java_lang_Class::is_primitive(mirror)) { 864 // Primitive objects does not have any interfaces 865 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), 0, CHECK_NULL); 866 return (jobjectArray) JNIHandles::make_local(env, r); 867 } 868 869 KlassHandle klass(thread, java_lang_Class::as_klassOop(mirror)); 870 // Figure size of result array 871 int size; 872 if (klass->oop_is_instance()) { 873 size = instanceKlass::cast(klass())->local_interfaces()->length(); 874 } else { 875 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass"); 876 size = 2; 877 } 878 879 // Allocate result array 880 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), size, CHECK_NULL); 881 objArrayHandle result (THREAD, r); 882 // Fill in result 883 if (klass->oop_is_instance()) { 884 // Regular instance klass, fill in all local interfaces 885 for (int index = 0; index < size; index++) { 886 klassOop k = klassOop(instanceKlass::cast(klass())->local_interfaces()->obj_at(index)); 887 result->obj_at_put(index, Klass::cast(k)->java_mirror()); 888 } 889 } else { 890 // All arrays implement java.lang.Cloneable and java.io.Serializable 891 result->obj_at_put(0, Klass::cast(SystemDictionary::cloneable_klass())->java_mirror()); 892 result->obj_at_put(1, Klass::cast(SystemDictionary::serializable_klass())->java_mirror()); 893 } 894 return (jobjectArray) JNIHandles::make_local(env, result()); 895JVM_END 896 897 898JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls)) 899 JVMWrapper("JVM_GetClassLoader"); 900 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 901 return NULL; 902 } 903 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 904 oop loader = Klass::cast(k)->class_loader(); 905 return JNIHandles::make_local(env, loader); 906JVM_END 907 908 909JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls)) 910 JVMWrapper("JVM_IsInterface"); 911 oop mirror = JNIHandles::resolve_non_null(cls); 912 if (java_lang_Class::is_primitive(mirror)) { 913 return JNI_FALSE; 914 } 915 klassOop k = java_lang_Class::as_klassOop(mirror); 916 jboolean result = Klass::cast(k)->is_interface(); 917 assert(!result || Klass::cast(k)->oop_is_instance(), 918 "all interfaces are instance types"); 919 // The compiler intrinsic for isInterface tests the 920 // Klass::_access_flags bits in the same way. 921 return result; 922JVM_END 923 924 925JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls)) 926 JVMWrapper("JVM_GetClassSigners"); 927 JvmtiVMObjectAllocEventCollector oam; 928 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 929 // There are no signers for primitive types 930 return NULL; 931 } 932 933 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 934 objArrayOop signers = NULL; 935 if (Klass::cast(k)->oop_is_instance()) { 936 signers = instanceKlass::cast(k)->signers(); 937 } 938 939 // If there are no signers set in the class, or if the class 940 // is an array, return NULL. 941 if (signers == NULL) return NULL; 942 943 // copy of the signers array 944 klassOop element = objArrayKlass::cast(signers->klass())->element_klass(); 945 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL); 946 for (int index = 0; index < signers->length(); index++) { 947 signers_copy->obj_at_put(index, signers->obj_at(index)); 948 } 949 950 // return the copy 951 return (jobjectArray) JNIHandles::make_local(env, signers_copy); 952JVM_END 953 954 955JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers)) 956 JVMWrapper("JVM_SetClassSigners"); 957 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 958 // This call is ignored for primitive types and arrays. 959 // Signers are only set once, ClassLoader.java, and thus shouldn't 960 // be called with an array. Only the bootstrap loader creates arrays. 961 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 962 if (Klass::cast(k)->oop_is_instance()) { 963 instanceKlass::cast(k)->set_signers(objArrayOop(JNIHandles::resolve(signers))); 964 } 965 } 966JVM_END 967 968 969JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls)) 970 JVMWrapper("JVM_GetProtectionDomain"); 971 if (JNIHandles::resolve(cls) == NULL) { 972 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); 973 } 974 975 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 976 // Primitive types does not have a protection domain. 977 return NULL; 978 } 979 980 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); 981 return (jobject) JNIHandles::make_local(env, Klass::cast(k)->protection_domain()); 982JVM_END 983 984 985// Obsolete since 1.2 (Class.setProtectionDomain removed), although 986// still defined in core libraries as of 1.5. 987JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain)) 988 JVMWrapper("JVM_SetProtectionDomain"); 989 if (JNIHandles::resolve(cls) == NULL) { 990 THROW(vmSymbols::java_lang_NullPointerException()); 991 } 992 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 993 // Call is ignored for primitive types 994 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); 995 996 // cls won't be an array, as this called only from ClassLoader.defineClass 997 if (Klass::cast(k)->oop_is_instance()) { 998 oop pd = JNIHandles::resolve(protection_domain); 999 assert(pd == NULL || pd->is_oop(), "just checking"); 1000 instanceKlass::cast(k)->set_protection_domain(pd); 1001 } 1002 } 1003JVM_END 1004 1005 1006JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException)) 1007 JVMWrapper("JVM_DoPrivileged"); 1008 1009 if (action == NULL) { 1010 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action"); 1011 } 1012 1013 // Stack allocated list of privileged stack elements 1014 PrivilegedElement pi; 1015 1016 // Check that action object understands "Object run()" 1017 Handle object (THREAD, JNIHandles::resolve(action)); 1018 1019 // get run() method 1020 methodOop m_oop = Klass::cast(object->klass())->uncached_lookup_method( 1021 vmSymbols::run_method_name(), 1022 vmSymbols::void_object_signature()); 1023 methodHandle m (THREAD, m_oop); 1024 if (m.is_null() || !m->is_method() || !methodOop(m())->is_public() || methodOop(m())->is_static()) { 1025 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method"); 1026 } 1027 1028 // Compute the frame initiating the do privileged operation and setup the privileged stack 1029 vframeStream vfst(thread); 1030 vfst.security_get_caller_frame(1); 1031 1032 if (!vfst.at_end()) { 1033 pi.initialize(&vfst, JNIHandles::resolve(context), thread->privileged_stack_top(), CHECK_NULL); 1034 thread->set_privileged_stack_top(&pi); 1035 } 1036 1037 1038 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type 1039 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction 1040 Handle pending_exception; 1041 JavaValue result(T_OBJECT); 1042 JavaCallArguments args(object); 1043 JavaCalls::call(&result, m, &args, THREAD); 1044 1045 // done with action, remove ourselves from the list 1046 if (!vfst.at_end()) { 1047 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element"); 1048 thread->set_privileged_stack_top(thread->privileged_stack_top()->next()); 1049 } 1050 1051 if (HAS_PENDING_EXCEPTION) { 1052 pending_exception = Handle(THREAD, PENDING_EXCEPTION); 1053 CLEAR_PENDING_EXCEPTION; 1054 1055 if ( pending_exception->is_a(SystemDictionary::exception_klass()) && 1056 !pending_exception->is_a(SystemDictionary::runtime_exception_klass())) { 1057 // Throw a java.security.PrivilegedActionException(Exception e) exception 1058 JavaCallArguments args(pending_exception); 1059 THROW_ARG_0(vmSymbolHandles::java_security_PrivilegedActionException(), 1060 vmSymbolHandles::exception_void_signature(), 1061 &args); 1062 } 1063 } 1064 1065 if (pending_exception.not_null()) THROW_OOP_0(pending_exception()); 1066 return JNIHandles::make_local(env, (oop) result.get_jobject()); 1067JVM_END 1068 1069 1070// Returns the inherited_access_control_context field of the running thread. 1071JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls)) 1072 JVMWrapper("JVM_GetInheritedAccessControlContext"); 1073 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj()); 1074 return JNIHandles::make_local(env, result); 1075JVM_END 1076 1077class RegisterArrayForGC { 1078 private: 1079 JavaThread *_thread; 1080 public: 1081 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) { 1082 _thread = thread; 1083 _thread->register_array_for_gc(array); 1084 } 1085 1086 ~RegisterArrayForGC() { 1087 _thread->register_array_for_gc(NULL); 1088 } 1089}; 1090 1091 1092JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls)) 1093 JVMWrapper("JVM_GetStackAccessControlContext"); 1094 if (!UsePrivilegedStack) return NULL; 1095 1096 ResourceMark rm(THREAD); 1097 GrowableArray<oop>* local_array = new GrowableArray<oop>(12); 1098 JvmtiVMObjectAllocEventCollector oam; 1099 1100 // count the protection domains on the execution stack. We collapse 1101 // duplicate consecutive protection domains into a single one, as 1102 // well as stopping when we hit a privileged frame. 1103 1104 // Use vframeStream to iterate through Java frames 1105 vframeStream vfst(thread); 1106 1107 oop previous_protection_domain = NULL; 1108 Handle privileged_context(thread, NULL); 1109 bool is_privileged = false; 1110 oop protection_domain = NULL; 1111 1112 for(; !vfst.at_end(); vfst.next()) { 1113 // get method of frame 1114 methodOop method = vfst.method(); 1115 intptr_t* frame_id = vfst.frame_id(); 1116 1117 // check the privileged frames to see if we have a match 1118 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) { 1119 // this frame is privileged 1120 is_privileged = true; 1121 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context()); 1122 protection_domain = thread->privileged_stack_top()->protection_domain(); 1123 } else { 1124 protection_domain = instanceKlass::cast(method->method_holder())->protection_domain(); 1125 } 1126 1127 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) { 1128 local_array->push(protection_domain); 1129 previous_protection_domain = protection_domain; 1130 } 1131 1132 if (is_privileged) break; 1133 } 1134 1135 1136 // either all the domains on the stack were system domains, or 1137 // we had a privileged system domain 1138 if (local_array->is_empty()) { 1139 if (is_privileged && privileged_context.is_null()) return NULL; 1140 1141 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL); 1142 return JNIHandles::make_local(env, result); 1143 } 1144 1145 // the resource area must be registered in case of a gc 1146 RegisterArrayForGC ragc(thread, local_array); 1147 objArrayOop context = oopFactory::new_objArray(SystemDictionary::protectionDomain_klass(), 1148 local_array->length(), CHECK_NULL); 1149 objArrayHandle h_context(thread, context); 1150 for (int index = 0; index < local_array->length(); index++) { 1151 h_context->obj_at_put(index, local_array->at(index)); 1152 } 1153 1154 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL); 1155 1156 return JNIHandles::make_local(env, result); 1157JVM_END 1158 1159 1160JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls)) 1161 JVMWrapper("JVM_IsArrayClass"); 1162 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 1163 return (k != NULL) && Klass::cast(k)->oop_is_javaArray() ? true : false; 1164JVM_END 1165 1166 1167JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls)) 1168 JVMWrapper("JVM_IsPrimitiveClass"); 1169 oop mirror = JNIHandles::resolve_non_null(cls); 1170 return (jboolean) java_lang_Class::is_primitive(mirror); 1171JVM_END 1172 1173 1174JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls)) 1175 JVMWrapper("JVM_GetComponentType"); 1176 oop mirror = JNIHandles::resolve_non_null(cls); 1177 oop result = Reflection::array_component_type(mirror, CHECK_NULL); 1178 return (jclass) JNIHandles::make_local(env, result); 1179JVM_END 1180 1181 1182JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls)) 1183 JVMWrapper("JVM_GetClassModifiers"); 1184 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1185 // Primitive type 1186 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 1187 } 1188 1189 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls))); 1190 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0)); 1191 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK"); 1192 return k->modifier_flags(); 1193JVM_END 1194 1195 1196// Inner class reflection /////////////////////////////////////////////////////////////////////////////// 1197 1198JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass)) 1199 const int inner_class_info_index = 0; 1200 const int outer_class_info_index = 1; 1201 1202 JvmtiVMObjectAllocEventCollector oam; 1203 // ofClass is a reference to a java_lang_Class object. The mirror object 1204 // of an instanceKlass 1205 1206 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1207 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) { 1208 oop result = oopFactory::new_objArray(SystemDictionary::class_klass(), 0, CHECK_NULL); 1209 return (jobjectArray)JNIHandles::make_local(env, result); 1210 } 1211 1212 instanceKlassHandle k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); 1213 1214 if (k->inner_classes()->length() == 0) { 1215 // Neither an inner nor outer class 1216 oop result = oopFactory::new_objArray(SystemDictionary::class_klass(), 0, CHECK_NULL); 1217 return (jobjectArray)JNIHandles::make_local(env, result); 1218 } 1219 1220 // find inner class info 1221 typeArrayHandle icls(thread, k->inner_classes()); 1222 constantPoolHandle cp(thread, k->constants()); 1223 int length = icls->length(); 1224 1225 // Allocate temp. result array 1226 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), length/4, CHECK_NULL); 1227 objArrayHandle result (THREAD, r); 1228 int members = 0; 1229 1230 for(int i = 0; i < length; i += 4) { 1231 int ioff = icls->ushort_at(i + inner_class_info_index); 1232 int ooff = icls->ushort_at(i + outer_class_info_index); 1233 1234 if (ioff != 0 && ooff != 0) { 1235 // Check to see if the name matches the class we're looking for 1236 // before attempting to find the class. 1237 if (cp->klass_name_at_matches(k, ooff)) { 1238 klassOop outer_klass = cp->klass_at(ooff, CHECK_NULL); 1239 if (outer_klass == k()) { 1240 klassOop ik = cp->klass_at(ioff, CHECK_NULL); 1241 instanceKlassHandle inner_klass (THREAD, ik); 1242 1243 // Throws an exception if outer klass has not declared k as 1244 // an inner klass 1245 Reflection::check_for_inner_class(k, inner_klass, CHECK_NULL); 1246 1247 result->obj_at_put(members, inner_klass->java_mirror()); 1248 members++; 1249 } 1250 } 1251 } 1252 } 1253 1254 if (members != length) { 1255 // Return array of right length 1256 objArrayOop res = oopFactory::new_objArray(SystemDictionary::class_klass(), members, CHECK_NULL); 1257 for(int i = 0; i < members; i++) { 1258 res->obj_at_put(i, result->obj_at(i)); 1259 } 1260 return (jobjectArray)JNIHandles::make_local(env, res); 1261 } 1262 1263 return (jobjectArray)JNIHandles::make_local(env, result()); 1264JVM_END 1265 1266 1267JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass)) 1268 const int inner_class_info_index = 0; 1269 const int outer_class_info_index = 1; 1270 1271 // ofClass is a reference to a java_lang_Class object. 1272 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1273 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) { 1274 return NULL; 1275 } 1276 1277 instanceKlassHandle k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); 1278 1279 if (k->inner_classes()->length() == 0) { 1280 // No inner class info => no declaring class 1281 return NULL; 1282 } 1283 1284 typeArrayHandle i_icls(thread, k->inner_classes()); 1285 constantPoolHandle i_cp(thread, k->constants()); 1286 int i_length = i_icls->length(); 1287 1288 bool found = false; 1289 klassOop ok; 1290 instanceKlassHandle outer_klass; 1291 1292 // Find inner_klass attribute 1293 for(int i = 0; i < i_length && !found; i+= 4) { 1294 int ioff = i_icls->ushort_at(i + inner_class_info_index); 1295 int ooff = i_icls->ushort_at(i + outer_class_info_index); 1296 1297 if (ioff != 0 && ooff != 0) { 1298 // Check to see if the name matches the class we're looking for 1299 // before attempting to find the class. 1300 if (i_cp->klass_name_at_matches(k, ioff)) { 1301 klassOop inner_klass = i_cp->klass_at(ioff, CHECK_NULL); 1302 if (k() == inner_klass) { 1303 found = true; 1304 ok = i_cp->klass_at(ooff, CHECK_NULL); 1305 outer_klass = instanceKlassHandle(thread, ok); 1306 } 1307 } 1308 } 1309 } 1310 1311 // If no inner class attribute found for this class. 1312 if (!found) return NULL; 1313 1314 // Throws an exception if outer klass has not declared k as an inner klass 1315 Reflection::check_for_inner_class(outer_klass, k, CHECK_NULL); 1316 1317 return (jclass)JNIHandles::make_local(env, outer_klass->java_mirror()); 1318JVM_END 1319 1320 1321JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls)) 1322 assert (cls != NULL, "illegal class"); 1323 JVMWrapper("JVM_GetClassSignature"); 1324 JvmtiVMObjectAllocEventCollector oam; 1325 ResourceMark rm(THREAD); 1326 // Return null for arrays and primatives 1327 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1328 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); 1329 if (Klass::cast(k)->oop_is_instance()) { 1330 symbolHandle sym = symbolHandle(THREAD, instanceKlass::cast(k)->generic_signature()); 1331 if (sym.is_null()) return NULL; 1332 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 1333 return (jstring) JNIHandles::make_local(env, str()); 1334 } 1335 } 1336 return NULL; 1337JVM_END 1338 1339 1340JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls)) 1341 assert (cls != NULL, "illegal class"); 1342 JVMWrapper("JVM_GetClassAnnotations"); 1343 ResourceMark rm(THREAD); 1344 // Return null for arrays and primitives 1345 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1346 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls)); 1347 if (Klass::cast(k)->oop_is_instance()) { 1348 return (jbyteArray) JNIHandles::make_local(env, 1349 instanceKlass::cast(k)->class_annotations()); 1350 } 1351 } 1352 return NULL; 1353JVM_END 1354 1355 1356JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field)) 1357 assert(field != NULL, "illegal field"); 1358 JVMWrapper("JVM_GetFieldAnnotations"); 1359 1360 // some of this code was adapted from from jni_FromReflectedField 1361 1362 // field is a handle to a java.lang.reflect.Field object 1363 oop reflected = JNIHandles::resolve_non_null(field); 1364 oop mirror = java_lang_reflect_Field::clazz(reflected); 1365 klassOop k = java_lang_Class::as_klassOop(mirror); 1366 int slot = java_lang_reflect_Field::slot(reflected); 1367 int modifiers = java_lang_reflect_Field::modifiers(reflected); 1368 1369 fieldDescriptor fd; 1370 KlassHandle kh(THREAD, k); 1371 intptr_t offset = instanceKlass::cast(kh())->offset_from_fields(slot); 1372 1373 if (modifiers & JVM_ACC_STATIC) { 1374 // for static fields we only look in the current class 1375 if (!instanceKlass::cast(kh())->find_local_field_from_offset(offset, 1376 true, &fd)) { 1377 assert(false, "cannot find static field"); 1378 return NULL; // robustness 1379 } 1380 } else { 1381 // for instance fields we start with the current class and work 1382 // our way up through the superclass chain 1383 if (!instanceKlass::cast(kh())->find_field_from_offset(offset, false, 1384 &fd)) { 1385 assert(false, "cannot find instance field"); 1386 return NULL; // robustness 1387 } 1388 } 1389 1390 return (jbyteArray) JNIHandles::make_local(env, fd.annotations()); 1391JVM_END 1392 1393 1394static methodOop jvm_get_method_common(jobject method, TRAPS) { 1395 // some of this code was adapted from from jni_FromReflectedMethod 1396 1397 oop reflected = JNIHandles::resolve_non_null(method); 1398 oop mirror = NULL; 1399 int slot = 0; 1400 1401 if (reflected->klass() == SystemDictionary::reflect_constructor_klass()) { 1402 mirror = java_lang_reflect_Constructor::clazz(reflected); 1403 slot = java_lang_reflect_Constructor::slot(reflected); 1404 } else { 1405 assert(reflected->klass() == SystemDictionary::reflect_method_klass(), 1406 "wrong type"); 1407 mirror = java_lang_reflect_Method::clazz(reflected); 1408 slot = java_lang_reflect_Method::slot(reflected); 1409 } 1410 klassOop k = java_lang_Class::as_klassOop(mirror); 1411 1412 KlassHandle kh(THREAD, k); 1413 methodOop m = instanceKlass::cast(kh())->method_with_idnum(slot); 1414 if (m == NULL) { 1415 assert(false, "cannot find method"); 1416 return NULL; // robustness 1417 } 1418 1419 return m; 1420} 1421 1422 1423JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method)) 1424 JVMWrapper("JVM_GetMethodAnnotations"); 1425 1426 // method is a handle to a java.lang.reflect.Method object 1427 methodOop m = jvm_get_method_common(method, CHECK_NULL); 1428 return (jbyteArray) JNIHandles::make_local(env, m->annotations()); 1429JVM_END 1430 1431 1432JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method)) 1433 JVMWrapper("JVM_GetMethodDefaultAnnotationValue"); 1434 1435 // method is a handle to a java.lang.reflect.Method object 1436 methodOop m = jvm_get_method_common(method, CHECK_NULL); 1437 return (jbyteArray) JNIHandles::make_local(env, m->annotation_default()); 1438JVM_END 1439 1440 1441JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method)) 1442 JVMWrapper("JVM_GetMethodParameterAnnotations"); 1443 1444 // method is a handle to a java.lang.reflect.Method object 1445 methodOop m = jvm_get_method_common(method, CHECK_NULL); 1446 return (jbyteArray) JNIHandles::make_local(env, m->parameter_annotations()); 1447JVM_END 1448 1449 1450// New (JDK 1.4) reflection implementation ///////////////////////////////////// 1451 1452JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1453{ 1454 JVMWrapper("JVM_GetClassDeclaredFields"); 1455 JvmtiVMObjectAllocEventCollector oam; 1456 1457 // Exclude primitive types and array types 1458 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1459 Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) { 1460 // Return empty array 1461 oop res = oopFactory::new_objArray(SystemDictionary::reflect_field_klass(), 0, CHECK_NULL); 1462 return (jobjectArray) JNIHandles::make_local(env, res); 1463 } 1464 1465 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); 1466 constantPoolHandle cp(THREAD, k->constants()); 1467 1468 // Ensure class is linked 1469 k->link_class(CHECK_NULL); 1470 1471 typeArrayHandle fields(THREAD, k->fields()); 1472 int fields_len = fields->length(); 1473 1474 // 4496456 We need to filter out java.lang.Throwable.backtrace 1475 bool skip_backtrace = false; 1476 1477 // Allocate result 1478 int num_fields; 1479 1480 if (publicOnly) { 1481 num_fields = 0; 1482 for (int i = 0, j = 0; i < fields_len; i += instanceKlass::next_offset, j++) { 1483 int mods = fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS; 1484 if (mods & JVM_ACC_PUBLIC) ++num_fields; 1485 } 1486 } else { 1487 num_fields = fields_len / instanceKlass::next_offset; 1488 1489 if (k() == SystemDictionary::throwable_klass()) { 1490 num_fields--; 1491 skip_backtrace = true; 1492 } 1493 } 1494 1495 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_field_klass(), num_fields, CHECK_NULL); 1496 objArrayHandle result (THREAD, r); 1497 1498 int out_idx = 0; 1499 fieldDescriptor fd; 1500 for (int i = 0; i < fields_len; i += instanceKlass::next_offset) { 1501 if (skip_backtrace) { 1502 // 4496456 skip java.lang.Throwable.backtrace 1503 int offset = k->offset_from_fields(i); 1504 if (offset == java_lang_Throwable::get_backtrace_offset()) continue; 1505 } 1506 1507 int mods = fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS; 1508 if (!publicOnly || (mods & JVM_ACC_PUBLIC)) { 1509 fd.initialize(k(), i); 1510 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL); 1511 result->obj_at_put(out_idx, field); 1512 ++out_idx; 1513 } 1514 } 1515 assert(out_idx == num_fields, "just checking"); 1516 return (jobjectArray) JNIHandles::make_local(env, result()); 1517} 1518JVM_END 1519 1520JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1521{ 1522 JVMWrapper("JVM_GetClassDeclaredMethods"); 1523 JvmtiVMObjectAllocEventCollector oam; 1524 1525 // Exclude primitive types and array types 1526 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) 1527 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) { 1528 // Return empty array 1529 oop res = oopFactory::new_objArray(SystemDictionary::reflect_method_klass(), 0, CHECK_NULL); 1530 return (jobjectArray) JNIHandles::make_local(env, res); 1531 } 1532 1533 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); 1534 1535 // Ensure class is linked 1536 k->link_class(CHECK_NULL); 1537 1538 objArrayHandle methods (THREAD, k->methods()); 1539 int methods_length = methods->length(); 1540 int num_methods = 0; 1541 1542 int i; 1543 for (i = 0; i < methods_length; i++) { 1544 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); 1545 if (!method->is_initializer()) { 1546 if (!publicOnly || method->is_public()) { 1547 ++num_methods; 1548 } 1549 } 1550 } 1551 1552 // Allocate result 1553 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_method_klass(), num_methods, CHECK_NULL); 1554 objArrayHandle result (THREAD, r); 1555 1556 int out_idx = 0; 1557 for (i = 0; i < methods_length; i++) { 1558 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); 1559 if (!method->is_initializer()) { 1560 if (!publicOnly || method->is_public()) { 1561 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL); 1562 result->obj_at_put(out_idx, m); 1563 ++out_idx; 1564 } 1565 } 1566 } 1567 assert(out_idx == num_methods, "just checking"); 1568 return (jobjectArray) JNIHandles::make_local(env, result()); 1569} 1570JVM_END 1571 1572JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1573{ 1574 JVMWrapper("JVM_GetClassDeclaredConstructors"); 1575 JvmtiVMObjectAllocEventCollector oam; 1576 1577 // Exclude primitive types and array types 1578 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) 1579 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) { 1580 // Return empty array 1581 oop res = oopFactory::new_objArray(SystemDictionary::reflect_constructor_klass(), 0 , CHECK_NULL); 1582 return (jobjectArray) JNIHandles::make_local(env, res); 1583 } 1584 1585 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))); 1586 1587 // Ensure class is linked 1588 k->link_class(CHECK_NULL); 1589 1590 objArrayHandle methods (THREAD, k->methods()); 1591 int methods_length = methods->length(); 1592 int num_constructors = 0; 1593 1594 int i; 1595 for (i = 0; i < methods_length; i++) { 1596 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); 1597 if (method->is_initializer() && !method->is_static()) { 1598 if (!publicOnly || method->is_public()) { 1599 ++num_constructors; 1600 } 1601 } 1602 } 1603 1604 // Allocate result 1605 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_constructor_klass(), num_constructors, CHECK_NULL); 1606 objArrayHandle result(THREAD, r); 1607 1608 int out_idx = 0; 1609 for (i = 0; i < methods_length; i++) { 1610 methodHandle method(THREAD, (methodOop) methods->obj_at(i)); 1611 if (method->is_initializer() && !method->is_static()) { 1612 if (!publicOnly || method->is_public()) { 1613 oop m = Reflection::new_constructor(method, CHECK_NULL); 1614 result->obj_at_put(out_idx, m); 1615 ++out_idx; 1616 } 1617 } 1618 } 1619 assert(out_idx == num_constructors, "just checking"); 1620 return (jobjectArray) JNIHandles::make_local(env, result()); 1621} 1622JVM_END 1623 1624JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls)) 1625{ 1626 JVMWrapper("JVM_GetClassAccessFlags"); 1627 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1628 // Primitive type 1629 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 1630 } 1631 1632 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls))); 1633 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS; 1634} 1635JVM_END 1636 1637 1638// Constant pool access ////////////////////////////////////////////////////////// 1639 1640JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls)) 1641{ 1642 JVMWrapper("JVM_GetClassConstantPool"); 1643 JvmtiVMObjectAllocEventCollector oam; 1644 1645 // Return null for primitives and arrays 1646 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1647 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 1648 if (Klass::cast(k)->oop_is_instance()) { 1649 instanceKlassHandle k_h(THREAD, k); 1650 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL); 1651 sun_reflect_ConstantPool::set_cp_oop(jcp(), k_h->constants()); 1652 return JNIHandles::make_local(jcp()); 1653 } 1654 } 1655 return NULL; 1656} 1657JVM_END 1658 1659 1660JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject unused, jobject jcpool)) 1661{ 1662 JVMWrapper("JVM_ConstantPoolGetSize"); 1663 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1664 return cp->length(); 1665} 1666JVM_END 1667 1668 1669static void bounds_check(constantPoolHandle cp, jint index, TRAPS) { 1670 if (!cp->is_within_bounds(index)) { 1671 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds"); 1672 } 1673} 1674 1675 1676JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1677{ 1678 JVMWrapper("JVM_ConstantPoolGetClassAt"); 1679 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1680 bounds_check(cp, index, CHECK_NULL); 1681 constantTag tag = cp->tag_at(index); 1682 if (!tag.is_klass() && !tag.is_unresolved_klass()) { 1683 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1684 } 1685 klassOop k = cp->klass_at(index, CHECK_NULL); 1686 return (jclass) JNIHandles::make_local(k->klass_part()->java_mirror()); 1687} 1688JVM_END 1689 1690 1691JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1692{ 1693 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded"); 1694 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1695 bounds_check(cp, index, CHECK_NULL); 1696 constantTag tag = cp->tag_at(index); 1697 if (!tag.is_klass() && !tag.is_unresolved_klass()) { 1698 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1699 } 1700 klassOop k = constantPoolOopDesc::klass_at_if_loaded(cp, index); 1701 if (k == NULL) return NULL; 1702 return (jclass) JNIHandles::make_local(k->klass_part()->java_mirror()); 1703} 1704JVM_END 1705 1706static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { 1707 constantTag tag = cp->tag_at(index); 1708 if (!tag.is_method() && !tag.is_interface_method()) { 1709 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1710 } 1711 int klass_ref = cp->uncached_klass_ref_index_at(index); 1712 klassOop k_o; 1713 if (force_resolution) { 1714 k_o = cp->klass_at(klass_ref, CHECK_NULL); 1715 } else { 1716 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref); 1717 if (k_o == NULL) return NULL; 1718 } 1719 instanceKlassHandle k(THREAD, k_o); 1720 symbolOop name = cp->uncached_name_ref_at(index); 1721 symbolOop sig = cp->uncached_signature_ref_at(index); 1722 methodHandle m (THREAD, k->find_method(name, sig)); 1723 if (m.is_null()) { 1724 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class"); 1725 } 1726 oop method; 1727 if (!m->is_initializer() || m->is_static()) { 1728 method = Reflection::new_method(m, true, true, CHECK_NULL); 1729 } else { 1730 method = Reflection::new_constructor(m, CHECK_NULL); 1731 } 1732 return JNIHandles::make_local(method); 1733} 1734 1735JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1736{ 1737 JVMWrapper("JVM_ConstantPoolGetMethodAt"); 1738 JvmtiVMObjectAllocEventCollector oam; 1739 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1740 bounds_check(cp, index, CHECK_NULL); 1741 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL); 1742 return res; 1743} 1744JVM_END 1745 1746JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1747{ 1748 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded"); 1749 JvmtiVMObjectAllocEventCollector oam; 1750 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1751 bounds_check(cp, index, CHECK_NULL); 1752 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL); 1753 return res; 1754} 1755JVM_END 1756 1757static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { 1758 constantTag tag = cp->tag_at(index); 1759 if (!tag.is_field()) { 1760 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1761 } 1762 int klass_ref = cp->uncached_klass_ref_index_at(index); 1763 klassOop k_o; 1764 if (force_resolution) { 1765 k_o = cp->klass_at(klass_ref, CHECK_NULL); 1766 } else { 1767 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref); 1768 if (k_o == NULL) return NULL; 1769 } 1770 instanceKlassHandle k(THREAD, k_o); 1771 symbolOop name = cp->uncached_name_ref_at(index); 1772 symbolOop sig = cp->uncached_signature_ref_at(index); 1773 fieldDescriptor fd; 1774 klassOop target_klass = k->find_field(name, sig, &fd); 1775 if (target_klass == NULL) { 1776 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class"); 1777 } 1778 oop field = Reflection::new_field(&fd, true, CHECK_NULL); 1779 return JNIHandles::make_local(field); 1780} 1781 1782JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1783{ 1784 JVMWrapper("JVM_ConstantPoolGetFieldAt"); 1785 JvmtiVMObjectAllocEventCollector oam; 1786 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1787 bounds_check(cp, index, CHECK_NULL); 1788 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL); 1789 return res; 1790} 1791JVM_END 1792 1793JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1794{ 1795 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded"); 1796 JvmtiVMObjectAllocEventCollector oam; 1797 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1798 bounds_check(cp, index, CHECK_NULL); 1799 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL); 1800 return res; 1801} 1802JVM_END 1803 1804JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1805{ 1806 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt"); 1807 JvmtiVMObjectAllocEventCollector oam; 1808 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1809 bounds_check(cp, index, CHECK_NULL); 1810 constantTag tag = cp->tag_at(index); 1811 if (!tag.is_field_or_method()) { 1812 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1813 } 1814 int klass_ref = cp->uncached_klass_ref_index_at(index); 1815 symbolHandle klass_name (THREAD, cp->klass_name_at(klass_ref)); 1816 symbolHandle member_name(THREAD, cp->uncached_name_ref_at(index)); 1817 symbolHandle member_sig (THREAD, cp->uncached_signature_ref_at(index)); 1818 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::string_klass(), 3, CHECK_NULL); 1819 objArrayHandle dest(THREAD, dest_o); 1820 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL); 1821 dest->obj_at_put(0, str()); 1822 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL); 1823 dest->obj_at_put(1, str()); 1824 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL); 1825 dest->obj_at_put(2, str()); 1826 return (jobjectArray) JNIHandles::make_local(dest()); 1827} 1828JVM_END 1829 1830JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1831{ 1832 JVMWrapper("JVM_ConstantPoolGetIntAt"); 1833 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1834 bounds_check(cp, index, CHECK_0); 1835 constantTag tag = cp->tag_at(index); 1836 if (!tag.is_int()) { 1837 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1838 } 1839 return cp->int_at(index); 1840} 1841JVM_END 1842 1843JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1844{ 1845 JVMWrapper("JVM_ConstantPoolGetLongAt"); 1846 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1847 bounds_check(cp, index, CHECK_(0L)); 1848 constantTag tag = cp->tag_at(index); 1849 if (!tag.is_long()) { 1850 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1851 } 1852 return cp->long_at(index); 1853} 1854JVM_END 1855 1856JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1857{ 1858 JVMWrapper("JVM_ConstantPoolGetFloatAt"); 1859 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1860 bounds_check(cp, index, CHECK_(0.0f)); 1861 constantTag tag = cp->tag_at(index); 1862 if (!tag.is_float()) { 1863 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1864 } 1865 return cp->float_at(index); 1866} 1867JVM_END 1868 1869JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1870{ 1871 JVMWrapper("JVM_ConstantPoolGetDoubleAt"); 1872 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1873 bounds_check(cp, index, CHECK_(0.0)); 1874 constantTag tag = cp->tag_at(index); 1875 if (!tag.is_double()) { 1876 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1877 } 1878 return cp->double_at(index); 1879} 1880JVM_END 1881 1882JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1883{ 1884 JVMWrapper("JVM_ConstantPoolGetStringAt"); 1885 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1886 bounds_check(cp, index, CHECK_NULL); 1887 constantTag tag = cp->tag_at(index); 1888 if (!tag.is_string() && !tag.is_unresolved_string()) { 1889 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1890 } 1891 oop str = cp->string_at(index, CHECK_NULL); 1892 return (jstring) JNIHandles::make_local(str); 1893} 1894JVM_END 1895 1896JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject unused, jobject jcpool, jint index)) 1897{ 1898 JVMWrapper("JVM_ConstantPoolGetUTF8At"); 1899 JvmtiVMObjectAllocEventCollector oam; 1900 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool))); 1901 bounds_check(cp, index, CHECK_NULL); 1902 constantTag tag = cp->tag_at(index); 1903 if (!tag.is_symbol()) { 1904 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1905 } 1906 symbolOop sym_o = cp->symbol_at(index); 1907 symbolHandle sym(THREAD, sym_o); 1908 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 1909 return (jstring) JNIHandles::make_local(str()); 1910} 1911JVM_END 1912 1913 1914// Assertion support. ////////////////////////////////////////////////////////// 1915 1916JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls)) 1917 JVMWrapper("JVM_DesiredAssertionStatus"); 1918 assert(cls != NULL, "bad class"); 1919 1920 oop r = JNIHandles::resolve(cls); 1921 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed"); 1922 if (java_lang_Class::is_primitive(r)) return false; 1923 1924 klassOop k = java_lang_Class::as_klassOop(r); 1925 assert(Klass::cast(k)->oop_is_instance(), "must be an instance klass"); 1926 if (! Klass::cast(k)->oop_is_instance()) return false; 1927 1928 ResourceMark rm(THREAD); 1929 const char* name = Klass::cast(k)->name()->as_C_string(); 1930 bool system_class = Klass::cast(k)->class_loader() == NULL; 1931 return JavaAssertions::enabled(name, system_class); 1932 1933JVM_END 1934 1935 1936// Return a new AssertionStatusDirectives object with the fields filled in with 1937// command-line assertion arguments (i.e., -ea, -da). 1938JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused)) 1939 JVMWrapper("JVM_AssertionStatusDirectives"); 1940 JvmtiVMObjectAllocEventCollector oam; 1941 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL); 1942 return JNIHandles::make_local(env, asd); 1943JVM_END 1944 1945// Verification //////////////////////////////////////////////////////////////////////////////// 1946 1947// Reflection for the verifier ///////////////////////////////////////////////////////////////// 1948 1949// RedefineClasses support: bug 6214132 caused verification to fail. 1950// All functions from this section should call the jvmtiThreadSate function: 1951// klassOop class_to_verify_considering_redefinition(klassOop klass). 1952// The function returns a klassOop of the _scratch_class if the verifier 1953// was invoked in the middle of the class redefinition. 1954// Otherwise it returns its argument value which is the _the_class klassOop. 1955// Please, refer to the description in the jvmtiThreadSate.hpp. 1956 1957JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls)) 1958 JVMWrapper("JVM_GetClassNameUTF"); 1959 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 1960 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 1961 return Klass::cast(k)->name()->as_utf8(); 1962JVM_END 1963 1964 1965JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types)) 1966 JVMWrapper("JVM_GetClassCPTypes"); 1967 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 1968 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 1969 // types will have length zero if this is not an instanceKlass 1970 // (length is determined by call to JVM_GetClassCPEntriesCount) 1971 if (Klass::cast(k)->oop_is_instance()) { 1972 constantPoolOop cp = instanceKlass::cast(k)->constants(); 1973 for (int index = cp->length() - 1; index >= 0; index--) { 1974 constantTag tag = cp->tag_at(index); 1975 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : 1976 (tag.is_unresolved_string()) ? JVM_CONSTANT_String : tag.value(); 1977 } 1978 } 1979JVM_END 1980 1981 1982JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls)) 1983 JVMWrapper("JVM_GetClassCPEntriesCount"); 1984 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 1985 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 1986 if (!Klass::cast(k)->oop_is_instance()) 1987 return 0; 1988 return instanceKlass::cast(k)->constants()->length(); 1989JVM_END 1990 1991 1992JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls)) 1993 JVMWrapper("JVM_GetClassFieldsCount"); 1994 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 1995 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 1996 if (!Klass::cast(k)->oop_is_instance()) 1997 return 0; 1998 return instanceKlass::cast(k)->fields()->length() / instanceKlass::next_offset; 1999JVM_END 2000 2001 2002JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls)) 2003 JVMWrapper("JVM_GetClassMethodsCount"); 2004 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2005 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2006 if (!Klass::cast(k)->oop_is_instance()) 2007 return 0; 2008 return instanceKlass::cast(k)->methods()->length(); 2009JVM_END 2010 2011 2012// The following methods, used for the verifier, are never called with 2013// array klasses, so a direct cast to instanceKlass is safe. 2014// Typically, these methods are called in a loop with bounds determined 2015// by the results of JVM_GetClass{Fields,Methods}Count, which return 2016// zero for arrays. 2017JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions)) 2018 JVMWrapper("JVM_GetMethodIxExceptionIndexes"); 2019 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2020 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2021 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2022 int length = methodOop(method)->checked_exceptions_length(); 2023 if (length > 0) { 2024 CheckedExceptionElement* table= methodOop(method)->checked_exceptions_start(); 2025 for (int i = 0; i < length; i++) { 2026 exceptions[i] = table[i].class_cp_index; 2027 } 2028 } 2029JVM_END 2030 2031 2032JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index)) 2033 JVMWrapper("JVM_GetMethodIxExceptionsCount"); 2034 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2035 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2036 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2037 return methodOop(method)->checked_exceptions_length(); 2038JVM_END 2039 2040 2041JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code)) 2042 JVMWrapper("JVM_GetMethodIxByteCode"); 2043 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2044 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2045 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2046 memcpy(code, methodOop(method)->code_base(), methodOop(method)->code_size()); 2047JVM_END 2048 2049 2050JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index)) 2051 JVMWrapper("JVM_GetMethodIxByteCodeLength"); 2052 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2053 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2054 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2055 return methodOop(method)->code_size(); 2056JVM_END 2057 2058 2059JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry)) 2060 JVMWrapper("JVM_GetMethodIxExceptionTableEntry"); 2061 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2062 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2063 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2064 typeArrayOop extable = methodOop(method)->exception_table(); 2065 entry->start_pc = extable->int_at(entry_index * 4); 2066 entry->end_pc = extable->int_at(entry_index * 4 + 1); 2067 entry->handler_pc = extable->int_at(entry_index * 4 + 2); 2068 entry->catchType = extable->int_at(entry_index * 4 + 3); 2069JVM_END 2070 2071 2072JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index)) 2073 JVMWrapper("JVM_GetMethodIxExceptionTableLength"); 2074 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2075 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2076 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2077 return methodOop(method)->exception_table()->length() / 4; 2078JVM_END 2079 2080 2081JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index)) 2082 JVMWrapper("JVM_GetMethodIxModifiers"); 2083 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2084 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2085 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2086 return methodOop(method)->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2087JVM_END 2088 2089 2090JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index)) 2091 JVMWrapper("JVM_GetFieldIxModifiers"); 2092 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2093 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2094 typeArrayOop fields = instanceKlass::cast(k)->fields(); 2095 return fields->ushort_at(field_index * instanceKlass::next_offset + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS; 2096JVM_END 2097 2098 2099JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index)) 2100 JVMWrapper("JVM_GetMethodIxLocalsCount"); 2101 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2102 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2103 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2104 return methodOop(method)->max_locals(); 2105JVM_END 2106 2107 2108JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index)) 2109 JVMWrapper("JVM_GetMethodIxArgsSize"); 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)->size_of_parameters(); 2114JVM_END 2115 2116 2117JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index)) 2118 JVMWrapper("JVM_GetMethodIxMaxStack"); 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 return methodOop(method)->max_stack(); 2123JVM_END 2124 2125 2126JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index)) 2127 JVMWrapper("JVM_IsConstructorIx"); 2128 ResourceMark rm(THREAD); 2129 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2130 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2131 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2132 return methodOop(method)->name() == vmSymbols::object_initializer_name(); 2133JVM_END 2134 2135 2136JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index)) 2137 JVMWrapper("JVM_GetMethodIxIxUTF"); 2138 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2139 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2140 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2141 return methodOop(method)->name()->as_utf8(); 2142JVM_END 2143 2144 2145JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index)) 2146 JVMWrapper("JVM_GetMethodIxSignatureUTF"); 2147 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2148 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2149 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index); 2150 return methodOop(method)->signature()->as_utf8(); 2151JVM_END 2152 2153/** 2154 * All of these JVM_GetCP-xxx methods are used by the old verifier to 2155 * read entries in the constant pool. Since the old verifier always 2156 * works on a copy of the code, it will not see any rewriting that 2157 * may possibly occur in the middle of verification. So it is important 2158 * that nothing it calls tries to use the cpCache instead of the raw 2159 * constant pool, so we must use cp->uncached_x methods when appropriate. 2160 */ 2161JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2162 JVMWrapper("JVM_GetCPFieldNameUTF"); 2163 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2164 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2165 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2166 switch (cp->tag_at(cp_index).value()) { 2167 case JVM_CONSTANT_Fieldref: 2168 return cp->uncached_name_ref_at(cp_index)->as_utf8(); 2169 default: 2170 fatal("JVM_GetCPFieldNameUTF: illegal constant"); 2171 } 2172 ShouldNotReachHere(); 2173 return NULL; 2174JVM_END 2175 2176 2177JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2178 JVMWrapper("JVM_GetCPMethodNameUTF"); 2179 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2180 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2181 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2182 switch (cp->tag_at(cp_index).value()) { 2183 case JVM_CONSTANT_InterfaceMethodref: 2184 case JVM_CONSTANT_Methodref: 2185 return cp->uncached_name_ref_at(cp_index)->as_utf8(); 2186 default: 2187 fatal("JVM_GetCPMethodNameUTF: illegal constant"); 2188 } 2189 ShouldNotReachHere(); 2190 return NULL; 2191JVM_END 2192 2193 2194JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) 2195 JVMWrapper("JVM_GetCPMethodSignatureUTF"); 2196 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2197 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2198 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2199 switch (cp->tag_at(cp_index).value()) { 2200 case JVM_CONSTANT_InterfaceMethodref: 2201 case JVM_CONSTANT_Methodref: 2202 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); 2203 default: 2204 fatal("JVM_GetCPMethodSignatureUTF: illegal constant"); 2205 } 2206 ShouldNotReachHere(); 2207 return NULL; 2208JVM_END 2209 2210 2211JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) 2212 JVMWrapper("JVM_GetCPFieldSignatureUTF"); 2213 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2214 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2215 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2216 switch (cp->tag_at(cp_index).value()) { 2217 case JVM_CONSTANT_Fieldref: 2218 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); 2219 default: 2220 fatal("JVM_GetCPFieldSignatureUTF: illegal constant"); 2221 } 2222 ShouldNotReachHere(); 2223 return NULL; 2224JVM_END 2225 2226 2227JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2228 JVMWrapper("JVM_GetCPClassNameUTF"); 2229 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2230 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2231 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2232 symbolOop classname = cp->klass_name_at(cp_index); 2233 return classname->as_utf8(); 2234JVM_END 2235 2236 2237JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2238 JVMWrapper("JVM_GetCPFieldClassNameUTF"); 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 int class_index = cp->uncached_klass_ref_index_at(cp_index); 2245 symbolOop classname = cp->klass_name_at(class_index); 2246 return classname->as_utf8(); 2247 } 2248 default: 2249 fatal("JVM_GetCPFieldClassNameUTF: illegal constant"); 2250 } 2251 ShouldNotReachHere(); 2252 return NULL; 2253JVM_END 2254 2255 2256JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2257 JVMWrapper("JVM_GetCPMethodClassNameUTF"); 2258 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2259 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2260 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2261 switch (cp->tag_at(cp_index).value()) { 2262 case JVM_CONSTANT_Methodref: 2263 case JVM_CONSTANT_InterfaceMethodref: { 2264 int class_index = cp->uncached_klass_ref_index_at(cp_index); 2265 symbolOop classname = cp->klass_name_at(class_index); 2266 return classname->as_utf8(); 2267 } 2268 default: 2269 fatal("JVM_GetCPMethodClassNameUTF: illegal constant"); 2270 } 2271 ShouldNotReachHere(); 2272 return NULL; 2273JVM_END 2274 2275 2276JVM_QUICK_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) 2277 JVMWrapper("JVM_GetCPFieldModifiers"); 2278 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2279 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls)); 2280 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2281 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); 2282 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2283 constantPoolOop cp_called = instanceKlass::cast(k_called)->constants(); 2284 switch (cp->tag_at(cp_index).value()) { 2285 case JVM_CONSTANT_Fieldref: { 2286 symbolOop name = cp->uncached_name_ref_at(cp_index); 2287 symbolOop signature = cp->uncached_signature_ref_at(cp_index); 2288 typeArrayOop fields = instanceKlass::cast(k_called)->fields(); 2289 int fields_count = fields->length(); 2290 for (int i = 0; i < fields_count; i += instanceKlass::next_offset) { 2291 if (cp_called->symbol_at(fields->ushort_at(i + instanceKlass::name_index_offset)) == name && 2292 cp_called->symbol_at(fields->ushort_at(i + instanceKlass::signature_index_offset)) == signature) { 2293 return fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS; 2294 } 2295 } 2296 return -1; 2297 } 2298 default: 2299 fatal("JVM_GetCPFieldModifiers: illegal constant"); 2300 } 2301 ShouldNotReachHere(); 2302 return 0; 2303JVM_END 2304 2305 2306JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) 2307 JVMWrapper("JVM_GetCPMethodModifiers"); 2308 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)); 2309 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls)); 2310 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2311 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); 2312 constantPoolOop cp = instanceKlass::cast(k)->constants(); 2313 switch (cp->tag_at(cp_index).value()) { 2314 case JVM_CONSTANT_Methodref: 2315 case JVM_CONSTANT_InterfaceMethodref: { 2316 symbolOop name = cp->uncached_name_ref_at(cp_index); 2317 symbolOop signature = cp->uncached_signature_ref_at(cp_index); 2318 objArrayOop methods = instanceKlass::cast(k_called)->methods(); 2319 int methods_count = methods->length(); 2320 for (int i = 0; i < methods_count; i++) { 2321 methodOop method = methodOop(methods->obj_at(i)); 2322 if (method->name() == name && method->signature() == signature) { 2323 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2324 } 2325 } 2326 return -1; 2327 } 2328 default: 2329 fatal("JVM_GetCPMethodModifiers: illegal constant"); 2330 } 2331 ShouldNotReachHere(); 2332 return 0; 2333JVM_END 2334 2335 2336// Misc ////////////////////////////////////////////////////////////////////////////////////////////// 2337 2338JVM_LEAF(void, JVM_ReleaseUTF(const char *utf)) 2339 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything 2340JVM_END 2341 2342 2343JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2)) 2344 JVMWrapper("JVM_IsSameClassPackage"); 2345 oop class1_mirror = JNIHandles::resolve_non_null(class1); 2346 oop class2_mirror = JNIHandles::resolve_non_null(class2); 2347 klassOop klass1 = java_lang_Class::as_klassOop(class1_mirror); 2348 klassOop klass2 = java_lang_Class::as_klassOop(class2_mirror); 2349 return (jboolean) Reflection::is_same_class_package(klass1, klass2); 2350JVM_END 2351 2352 2353// IO functions //////////////////////////////////////////////////////////////////////////////////////// 2354 2355JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode)) 2356 JVMWrapper2("JVM_Open (%s)", fname); 2357 2358 //%note jvm_r6 2359 int result = hpi::open(fname, flags, mode); 2360 if (result >= 0) { 2361 return result; 2362 } else { 2363 switch(errno) { 2364 case EEXIST: 2365 return JVM_EEXIST; 2366 default: 2367 return -1; 2368 } 2369 } 2370JVM_END 2371 2372 2373JVM_LEAF(jint, JVM_Close(jint fd)) 2374 JVMWrapper2("JVM_Close (0x%x)", fd); 2375 //%note jvm_r6 2376 return hpi::close(fd); 2377JVM_END 2378 2379 2380JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes)) 2381 JVMWrapper2("JVM_Read (0x%x)", fd); 2382 2383 //%note jvm_r6 2384 return (jint)hpi::read(fd, buf, nbytes); 2385JVM_END 2386 2387 2388JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes)) 2389 JVMWrapper2("JVM_Write (0x%x)", fd); 2390 2391 //%note jvm_r6 2392 return (jint)hpi::write(fd, buf, nbytes); 2393JVM_END 2394 2395 2396JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes)) 2397 JVMWrapper2("JVM_Available (0x%x)", fd); 2398 //%note jvm_r6 2399 return hpi::available(fd, pbytes); 2400JVM_END 2401 2402 2403JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence)) 2404 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence); 2405 //%note jvm_r6 2406 return hpi::lseek(fd, offset, whence); 2407JVM_END 2408 2409 2410JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length)) 2411 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length); 2412 return hpi::ftruncate(fd, length); 2413JVM_END 2414 2415 2416JVM_LEAF(jint, JVM_Sync(jint fd)) 2417 JVMWrapper2("JVM_Sync (0x%x)", fd); 2418 //%note jvm_r6 2419 return hpi::fsync(fd); 2420JVM_END 2421 2422 2423// Printing support ////////////////////////////////////////////////// 2424extern "C" { 2425 2426int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) { 2427 // see bug 4399518, 4417214 2428 if ((intptr_t)count <= 0) return -1; 2429 return vsnprintf(str, count, fmt, args); 2430} 2431 2432 2433int jio_snprintf(char *str, size_t count, const char *fmt, ...) { 2434 va_list args; 2435 int len; 2436 va_start(args, fmt); 2437 len = jio_vsnprintf(str, count, fmt, args); 2438 va_end(args); 2439 return len; 2440} 2441 2442 2443int jio_fprintf(FILE* f, const char *fmt, ...) { 2444 int len; 2445 va_list args; 2446 va_start(args, fmt); 2447 len = jio_vfprintf(f, fmt, args); 2448 va_end(args); 2449 return len; 2450} 2451 2452 2453int jio_vfprintf(FILE* f, const char *fmt, va_list args) { 2454 if (Arguments::vfprintf_hook() != NULL) { 2455 return Arguments::vfprintf_hook()(f, fmt, args); 2456 } else { 2457 return vfprintf(f, fmt, args); 2458 } 2459} 2460 2461 2462int jio_printf(const char *fmt, ...) { 2463 int len; 2464 va_list args; 2465 va_start(args, fmt); 2466 len = jio_vfprintf(defaultStream::output_stream(), fmt, args); 2467 va_end(args); 2468 return len; 2469} 2470 2471 2472// HotSpot specific jio method 2473void jio_print(const char* s) { 2474 // Try to make this function as atomic as possible. 2475 if (Arguments::vfprintf_hook() != NULL) { 2476 jio_fprintf(defaultStream::output_stream(), "%s", s); 2477 } else { 2478 // Make an unused local variable to avoid warning from gcc 4.x compiler. 2479 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s)); 2480 } 2481} 2482 2483} // Extern C 2484 2485// java.lang.Thread ////////////////////////////////////////////////////////////////////////////// 2486 2487// In most of the JVM Thread support functions we need to be sure to lock the Threads_lock 2488// to prevent the target thread from exiting after we have a pointer to the C++ Thread or 2489// OSThread objects. The exception to this rule is when the target object is the thread 2490// doing the operation, in which case we know that the thread won't exit until the 2491// operation is done (all exits being voluntary). There are a few cases where it is 2492// rather silly to do operations on yourself, like resuming yourself or asking whether 2493// you are alive. While these can still happen, they are not subject to deadlocks if 2494// the lock is held while the operation occurs (this is not the case for suspend, for 2495// instance), and are very unlikely. Because IsAlive needs to be fast and its 2496// implementation is local to this file, we always lock Threads_lock for that one. 2497 2498static void thread_entry(JavaThread* thread, TRAPS) { 2499 HandleMark hm(THREAD); 2500 Handle obj(THREAD, thread->threadObj()); 2501 JavaValue result(T_VOID); 2502 JavaCalls::call_virtual(&result, 2503 obj, 2504 KlassHandle(THREAD, SystemDictionary::thread_klass()), 2505 vmSymbolHandles::run_method_name(), 2506 vmSymbolHandles::void_method_signature(), 2507 THREAD); 2508} 2509 2510 2511JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread)) 2512 JVMWrapper("JVM_StartThread"); 2513 JavaThread *native_thread = NULL; 2514 2515 // We cannot hold the Threads_lock when we throw an exception, 2516 // due to rank ordering issues. Example: we might need to grab the 2517 // Heap_lock while we construct the exception. 2518 bool throw_illegal_thread_state = false; 2519 2520 // We must release the Threads_lock before we can post a jvmti event 2521 // in Thread::start. 2522 { 2523 // Ensure that the C++ Thread and OSThread structures aren't freed before 2524 // we operate. 2525 MutexLocker mu(Threads_lock); 2526 2527 // Check to see if we're running a thread that's already exited or was 2528 // stopped (is_stillborn) or is still active (thread is not NULL). 2529 if (java_lang_Thread::is_stillborn(JNIHandles::resolve_non_null(jthread)) || 2530 java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) { 2531 throw_illegal_thread_state = true; 2532 } else { 2533 jlong size = 2534 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread)); 2535 // Allocate the C++ Thread structure and create the native thread. The 2536 // stack size retrieved from java is signed, but the constructor takes 2537 // size_t (an unsigned type), so avoid passing negative values which would 2538 // result in really large stacks. 2539 size_t sz = size > 0 ? (size_t) size : 0; 2540 native_thread = new JavaThread(&thread_entry, sz); 2541 2542 // At this point it may be possible that no osthread was created for the 2543 // JavaThread due to lack of memory. Check for this situation and throw 2544 // an exception if necessary. Eventually we may want to change this so 2545 // that we only grab the lock if the thread was created successfully - 2546 // then we can also do this check and throw the exception in the 2547 // JavaThread constructor. 2548 if (native_thread->osthread() != NULL) { 2549 // Note: the current thread is not being used within "prepare". 2550 native_thread->prepare(jthread); 2551 } 2552 } 2553 } 2554 2555 if (throw_illegal_thread_state) { 2556 THROW(vmSymbols::java_lang_IllegalThreadStateException()); 2557 } 2558 2559 assert(native_thread != NULL, "Starting null thread?"); 2560 2561 if (native_thread->osthread() == NULL) { 2562 // No one should hold a reference to the 'native_thread'. 2563 delete native_thread; 2564 if (JvmtiExport::should_post_resource_exhausted()) { 2565 JvmtiExport::post_resource_exhausted( 2566 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS, 2567 "unable to create new native thread"); 2568 } 2569 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), 2570 "unable to create new native thread"); 2571 } 2572 2573 Thread::start(native_thread); 2574 2575JVM_END 2576 2577// JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints 2578// before the quasi-asynchronous exception is delivered. This is a little obtrusive, 2579// but is thought to be reliable and simple. In the case, where the receiver is the 2580// save thread as the sender, no safepoint is needed. 2581JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable)) 2582 JVMWrapper("JVM_StopThread"); 2583 2584 oop java_throwable = JNIHandles::resolve(throwable); 2585 if (java_throwable == NULL) { 2586 THROW(vmSymbols::java_lang_NullPointerException()); 2587 } 2588 oop java_thread = JNIHandles::resolve_non_null(jthread); 2589 JavaThread* receiver = java_lang_Thread::thread(java_thread); 2590 Events::log("JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", receiver, (address)java_thread, throwable); 2591 // First check if thread already exited 2592 if (receiver != NULL) { 2593 // Check if exception is getting thrown at self (use oop equality, since the 2594 // target object might exit) 2595 if (java_thread == thread->threadObj()) { 2596 // This is a change from JDK 1.1, but JDK 1.2 will also do it: 2597 // NOTE (from JDK 1.2): this is done solely to prevent stopped 2598 // threads from being restarted. 2599 // Fix for 4314342, 4145910, perhaps others: it now doesn't have 2600 // any effect on the "liveness" of a thread; see 2601 // JVM_IsThreadAlive, below. 2602 if (java_throwable->is_a(SystemDictionary::threaddeath_klass())) { 2603 java_lang_Thread::set_stillborn(java_thread); 2604 } 2605 THROW_OOP(java_throwable); 2606 } else { 2607 // Enques a VM_Operation to stop all threads and then deliver the exception... 2608 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable)); 2609 } 2610 } 2611JVM_END 2612 2613 2614JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread)) 2615 JVMWrapper("JVM_IsThreadAlive"); 2616 2617 oop thread_oop = JNIHandles::resolve_non_null(jthread); 2618 return java_lang_Thread::is_alive(thread_oop); 2619JVM_END 2620 2621 2622JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread)) 2623 JVMWrapper("JVM_SuspendThread"); 2624 oop java_thread = JNIHandles::resolve_non_null(jthread); 2625 JavaThread* receiver = java_lang_Thread::thread(java_thread); 2626 2627 if (receiver != NULL) { 2628 // thread has run and has not exited (still on threads list) 2629 2630 { 2631 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag); 2632 if (receiver->is_external_suspend()) { 2633 // Don't allow nested external suspend requests. We can't return 2634 // an error from this interface so just ignore the problem. 2635 return; 2636 } 2637 if (receiver->is_exiting()) { // thread is in the process of exiting 2638 return; 2639 } 2640 receiver->set_external_suspend(); 2641 } 2642 2643 // java_suspend() will catch threads in the process of exiting 2644 // and will ignore them. 2645 receiver->java_suspend(); 2646 2647 // It would be nice to have the following assertion in all the 2648 // time, but it is possible for a racing resume request to have 2649 // resumed this thread right after we suspended it. Temporarily 2650 // enable this assertion if you are chasing a different kind of 2651 // bug. 2652 // 2653 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL || 2654 // receiver->is_being_ext_suspended(), "thread is not suspended"); 2655 } 2656JVM_END 2657 2658 2659JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread)) 2660 JVMWrapper("JVM_ResumeThread"); 2661 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate. 2662 // We need to *always* get the threads lock here, since this operation cannot be allowed during 2663 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other 2664 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code 2665 // looks at it. 2666 MutexLocker ml(Threads_lock); 2667 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 2668 if (thr != NULL) { 2669 // the thread has run and is not in the process of exiting 2670 thr->java_resume(); 2671 } 2672JVM_END 2673 2674 2675JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio)) 2676 JVMWrapper("JVM_SetThreadPriority"); 2677 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 2678 MutexLocker ml(Threads_lock); 2679 oop java_thread = JNIHandles::resolve_non_null(jthread); 2680 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio); 2681 JavaThread* thr = java_lang_Thread::thread(java_thread); 2682 if (thr != NULL) { // Thread not yet started; priority pushed down when it is 2683 Thread::set_priority(thr, (ThreadPriority)prio); 2684 } 2685JVM_END 2686 2687 2688JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass)) 2689 JVMWrapper("JVM_Yield"); 2690 if (os::dont_yield()) return; 2691 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield. 2692 // Critical for similar threading behaviour 2693 if (ConvertYieldToSleep) { 2694 os::sleep(thread, MinSleepInterval, false); 2695 } else { 2696 os::yield(); 2697 } 2698JVM_END 2699 2700 2701JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis)) 2702 JVMWrapper("JVM_Sleep"); 2703 2704 if (millis < 0) { 2705 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative"); 2706 } 2707 2708 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) { 2709 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); 2710 } 2711 2712 // Save current thread state and restore it at the end of this block. 2713 // And set new thread state to SLEEPING. 2714 JavaThreadSleepState jtss(thread); 2715 2716 if (millis == 0) { 2717 // When ConvertSleepToYield is on, this matches the classic VM implementation of 2718 // JVM_Sleep. Critical for similar threading behaviour (Win32) 2719 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep 2720 // for SOLARIS 2721 if (ConvertSleepToYield) { 2722 os::yield(); 2723 } else { 2724 ThreadState old_state = thread->osthread()->get_state(); 2725 thread->osthread()->set_state(SLEEPING); 2726 os::sleep(thread, MinSleepInterval, false); 2727 thread->osthread()->set_state(old_state); 2728 } 2729 } else { 2730 ThreadState old_state = thread->osthread()->get_state(); 2731 thread->osthread()->set_state(SLEEPING); 2732 if (os::sleep(thread, millis, true) == OS_INTRPT) { 2733 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on 2734 // us while we were sleeping. We do not overwrite those. 2735 if (!HAS_PENDING_EXCEPTION) { 2736 // TODO-FIXME: THROW_MSG returns which means we will not call set_state() 2737 // to properly restore the thread state. That's likely wrong. 2738 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); 2739 } 2740 } 2741 thread->osthread()->set_state(old_state); 2742 } 2743JVM_END 2744 2745JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass)) 2746 JVMWrapper("JVM_CurrentThread"); 2747 oop jthread = thread->threadObj(); 2748 assert (thread != NULL, "no current thread!"); 2749 return JNIHandles::make_local(env, jthread); 2750JVM_END 2751 2752 2753JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread)) 2754 JVMWrapper("JVM_CountStackFrames"); 2755 2756 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 2757 oop java_thread = JNIHandles::resolve_non_null(jthread); 2758 bool throw_illegal_thread_state = false; 2759 int count = 0; 2760 2761 { 2762 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 2763 // We need to re-resolve the java_thread, since a GC might have happened during the 2764 // acquire of the lock 2765 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 2766 2767 if (thr == NULL) { 2768 // do nothing 2769 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) { 2770 // Check whether this java thread has been suspended already. If not, throws 2771 // IllegalThreadStateException. We defer to throw that exception until 2772 // Threads_lock is released since loading exception class has to leave VM. 2773 // The correct way to test a thread is actually suspended is 2774 // wait_for_ext_suspend_completion(), but we can't call that while holding 2775 // the Threads_lock. The above tests are sufficient for our purposes 2776 // provided the walkability of the stack is stable - which it isn't 2777 // 100% but close enough for most practical purposes. 2778 throw_illegal_thread_state = true; 2779 } else { 2780 // Count all java activation, i.e., number of vframes 2781 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) { 2782 // Native frames are not counted 2783 if (!vfst.method()->is_native()) count++; 2784 } 2785 } 2786 } 2787 2788 if (throw_illegal_thread_state) { 2789 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(), 2790 "this thread is not suspended"); 2791 } 2792 return count; 2793JVM_END 2794 2795// Consider: A better way to implement JVM_Interrupt() is to acquire 2796// Threads_lock to resolve the jthread into a Thread pointer, fetch 2797// Thread->platformevent, Thread->native_thr, Thread->parker, etc., 2798// drop Threads_lock, and the perform the unpark() and thr_kill() operations 2799// outside the critical section. Threads_lock is hot so we want to minimize 2800// the hold-time. A cleaner interface would be to decompose interrupt into 2801// two steps. The 1st phase, performed under Threads_lock, would return 2802// a closure that'd be invoked after Threads_lock was dropped. 2803// This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and 2804// admit spurious wakeups. 2805 2806JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread)) 2807 JVMWrapper("JVM_Interrupt"); 2808 2809 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 2810 oop java_thread = JNIHandles::resolve_non_null(jthread); 2811 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 2812 // We need to re-resolve the java_thread, since a GC might have happened during the 2813 // acquire of the lock 2814 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 2815 if (thr != NULL) { 2816 Thread::interrupt(thr); 2817 } 2818JVM_END 2819 2820 2821JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted)) 2822 JVMWrapper("JVM_IsInterrupted"); 2823 2824 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 2825 oop java_thread = JNIHandles::resolve_non_null(jthread); 2826 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 2827 // We need to re-resolve the java_thread, since a GC might have happened during the 2828 // acquire of the lock 2829 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 2830 if (thr == NULL) { 2831 return JNI_FALSE; 2832 } else { 2833 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0); 2834 } 2835JVM_END 2836 2837 2838// Return true iff the current thread has locked the object passed in 2839 2840JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj)) 2841 JVMWrapper("JVM_HoldsLock"); 2842 assert(THREAD->is_Java_thread(), "sanity check"); 2843 if (obj == NULL) { 2844 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); 2845 } 2846 Handle h_obj(THREAD, JNIHandles::resolve(obj)); 2847 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj); 2848JVM_END 2849 2850 2851JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass)) 2852 JVMWrapper("JVM_DumpAllStacks"); 2853 VM_PrintThreads op; 2854 VMThread::execute(&op); 2855 if (JvmtiExport::should_post_data_dump()) { 2856 JvmtiExport::post_data_dump(); 2857 } 2858JVM_END 2859 2860 2861// java.lang.SecurityManager /////////////////////////////////////////////////////////////////////// 2862 2863static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) { 2864 assert(jthread->is_Java_thread(), "must be a Java thread"); 2865 if (jthread->privileged_stack_top() == NULL) return false; 2866 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) { 2867 oop loader = jthread->privileged_stack_top()->class_loader(); 2868 if (loader == NULL) return true; 2869 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); 2870 if (trusted) return true; 2871 } 2872 return false; 2873} 2874 2875JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env)) 2876 JVMWrapper("JVM_CurrentLoadedClass"); 2877 ResourceMark rm(THREAD); 2878 2879 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 2880 // if a method in a class in a trusted loader is in a doPrivileged, return NULL 2881 bool trusted = is_trusted_frame(thread, &vfst); 2882 if (trusted) return NULL; 2883 2884 methodOop m = vfst.method(); 2885 if (!m->is_native()) { 2886 klassOop holder = m->method_holder(); 2887 oop loader = instanceKlass::cast(holder)->class_loader(); 2888 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 2889 return (jclass) JNIHandles::make_local(env, Klass::cast(holder)->java_mirror()); 2890 } 2891 } 2892 } 2893 return NULL; 2894JVM_END 2895 2896 2897JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env)) 2898 JVMWrapper("JVM_CurrentClassLoader"); 2899 ResourceMark rm(THREAD); 2900 2901 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 2902 2903 // if a method in a class in a trusted loader is in a doPrivileged, return NULL 2904 bool trusted = is_trusted_frame(thread, &vfst); 2905 if (trusted) return NULL; 2906 2907 methodOop m = vfst.method(); 2908 if (!m->is_native()) { 2909 klassOop holder = m->method_holder(); 2910 assert(holder->is_klass(), "just checking"); 2911 oop loader = instanceKlass::cast(holder)->class_loader(); 2912 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 2913 return JNIHandles::make_local(env, loader); 2914 } 2915 } 2916 } 2917 return NULL; 2918JVM_END 2919 2920 2921// Utility object for collecting method holders walking down the stack 2922class KlassLink: public ResourceObj { 2923 public: 2924 KlassHandle klass; 2925 KlassLink* next; 2926 2927 KlassLink(KlassHandle k) { klass = k; next = NULL; } 2928}; 2929 2930 2931JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env)) 2932 JVMWrapper("JVM_GetClassContext"); 2933 ResourceMark rm(THREAD); 2934 JvmtiVMObjectAllocEventCollector oam; 2935 // Collect linked list of (handles to) method holders 2936 KlassLink* first = NULL; 2937 KlassLink* last = NULL; 2938 int depth = 0; 2939 2940 for(vframeStream vfst(thread); !vfst.at_end(); vfst.security_get_caller_frame(1)) { 2941 // Native frames are not returned 2942 if (!vfst.method()->is_native()) { 2943 klassOop holder = vfst.method()->method_holder(); 2944 assert(holder->is_klass(), "just checking"); 2945 depth++; 2946 KlassLink* l = new KlassLink(KlassHandle(thread, holder)); 2947 if (first == NULL) { 2948 first = last = l; 2949 } else { 2950 last->next = l; 2951 last = l; 2952 } 2953 } 2954 } 2955 2956 // Create result array of type [Ljava/lang/Class; 2957 objArrayOop result = oopFactory::new_objArray(SystemDictionary::class_klass(), depth, CHECK_NULL); 2958 // Fill in mirrors corresponding to method holders 2959 int index = 0; 2960 while (first != NULL) { 2961 result->obj_at_put(index++, Klass::cast(first->klass())->java_mirror()); 2962 first = first->next; 2963 } 2964 assert(index == depth, "just checking"); 2965 2966 return (jobjectArray) JNIHandles::make_local(env, result); 2967JVM_END 2968 2969 2970JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name)) 2971 JVMWrapper("JVM_ClassDepth"); 2972 ResourceMark rm(THREAD); 2973 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); 2974 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0); 2975 2976 const char* str = java_lang_String::as_utf8_string(class_name_str()); 2977 symbolHandle class_name_sym = 2978 symbolHandle(THREAD, SymbolTable::probe(str, (int)strlen(str))); 2979 if (class_name_sym.is_null()) { 2980 return -1; 2981 } 2982 2983 int depth = 0; 2984 2985 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 2986 if (!vfst.method()->is_native()) { 2987 klassOop holder = vfst.method()->method_holder(); 2988 assert(holder->is_klass(), "just checking"); 2989 if (instanceKlass::cast(holder)->name() == class_name_sym()) { 2990 return depth; 2991 } 2992 depth++; 2993 } 2994 } 2995 return -1; 2996JVM_END 2997 2998 2999JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env)) 3000 JVMWrapper("JVM_ClassLoaderDepth"); 3001 ResourceMark rm(THREAD); 3002 int depth = 0; 3003 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3004 // if a method in a class in a trusted loader is in a doPrivileged, return -1 3005 bool trusted = is_trusted_frame(thread, &vfst); 3006 if (trusted) return -1; 3007 3008 methodOop m = vfst.method(); 3009 if (!m->is_native()) { 3010 klassOop holder = m->method_holder(); 3011 assert(holder->is_klass(), "just checking"); 3012 oop loader = instanceKlass::cast(holder)->class_loader(); 3013 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3014 return depth; 3015 } 3016 depth++; 3017 } 3018 } 3019 return -1; 3020JVM_END 3021 3022 3023// java.lang.Package //////////////////////////////////////////////////////////////// 3024 3025 3026JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name)) 3027 JVMWrapper("JVM_GetSystemPackage"); 3028 ResourceMark rm(THREAD); 3029 JvmtiVMObjectAllocEventCollector oam; 3030 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); 3031 oop result = ClassLoader::get_system_package(str, CHECK_NULL); 3032 return (jstring) JNIHandles::make_local(result); 3033JVM_END 3034 3035 3036JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env)) 3037 JVMWrapper("JVM_GetSystemPackages"); 3038 JvmtiVMObjectAllocEventCollector oam; 3039 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL); 3040 return (jobjectArray) JNIHandles::make_local(result); 3041JVM_END 3042 3043 3044// ObjectInputStream /////////////////////////////////////////////////////////////// 3045 3046bool force_verify_field_access(klassOop current_class, klassOop field_class, AccessFlags access, bool classloader_only) { 3047 if (current_class == NULL) { 3048 return true; 3049 } 3050 if ((current_class == field_class) || access.is_public()) { 3051 return true; 3052 } 3053 3054 if (access.is_protected()) { 3055 // See if current_class is a subclass of field_class 3056 if (Klass::cast(current_class)->is_subclass_of(field_class)) { 3057 return true; 3058 } 3059 } 3060 3061 return (!access.is_private() && instanceKlass::cast(current_class)->is_same_class_package(field_class)); 3062} 3063 3064 3065// JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4 3066JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass)) 3067 JVMWrapper("JVM_AllocateNewObject"); 3068 JvmtiVMObjectAllocEventCollector oam; 3069 // Receiver is not used 3070 oop curr_mirror = JNIHandles::resolve_non_null(currClass); 3071 oop init_mirror = JNIHandles::resolve_non_null(initClass); 3072 3073 // Cannot instantiate primitive types 3074 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) { 3075 ResourceMark rm(THREAD); 3076 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3077 } 3078 3079 // Arrays not allowed here, must use JVM_AllocateNewArray 3080 if (Klass::cast(java_lang_Class::as_klassOop(curr_mirror))->oop_is_javaArray() || 3081 Klass::cast(java_lang_Class::as_klassOop(init_mirror))->oop_is_javaArray()) { 3082 ResourceMark rm(THREAD); 3083 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3084 } 3085 3086 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_klassOop(curr_mirror)); 3087 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_klassOop(init_mirror)); 3088 3089 assert(curr_klass->is_subclass_of(init_klass()), "just checking"); 3090 3091 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly. 3092 curr_klass->check_valid_for_instantiation(false, CHECK_NULL); 3093 3094 // Make sure klass is initialized, since we are about to instantiate one of them. 3095 curr_klass->initialize(CHECK_NULL); 3096 3097 methodHandle m (THREAD, 3098 init_klass->find_method(vmSymbols::object_initializer_name(), 3099 vmSymbols::void_method_signature())); 3100 if (m.is_null()) { 3101 ResourceMark rm(THREAD); 3102 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), 3103 methodOopDesc::name_and_sig_as_C_string(Klass::cast(init_klass()), 3104 vmSymbols::object_initializer_name(), 3105 vmSymbols::void_method_signature())); 3106 } 3107 3108 if (curr_klass == init_klass && !m->is_public()) { 3109 // Calling the constructor for class 'curr_klass'. 3110 // Only allow calls to a public no-arg constructor. 3111 // This path corresponds to creating an Externalizable object. 3112 THROW_0(vmSymbols::java_lang_IllegalAccessException()); 3113 } 3114 3115 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) { 3116 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb' 3117 THROW_0(vmSymbols::java_lang_IllegalAccessException()); 3118 } 3119 3120 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL); 3121 // Call constructor m. This might call a constructor higher up in the hierachy 3122 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL); 3123 3124 return JNIHandles::make_local(obj()); 3125JVM_END 3126 3127 3128JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length)) 3129 JVMWrapper("JVM_AllocateNewArray"); 3130 JvmtiVMObjectAllocEventCollector oam; 3131 oop mirror = JNIHandles::resolve_non_null(currClass); 3132 3133 if (java_lang_Class::is_primitive(mirror)) { 3134 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3135 } 3136 klassOop k = java_lang_Class::as_klassOop(mirror); 3137 oop result; 3138 3139 if (k->klass_part()->oop_is_typeArray()) { 3140 // typeArray 3141 result = typeArrayKlass::cast(k)->allocate(length, CHECK_NULL); 3142 } else if (k->klass_part()->oop_is_objArray()) { 3143 // objArray 3144 objArrayKlassHandle oak(THREAD, k); 3145 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior) 3146 result = oak->allocate(length, CHECK_NULL); 3147 } else { 3148 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3149 } 3150 return JNIHandles::make_local(env, result); 3151JVM_END 3152 3153 3154// Return the first non-null class loader up the execution stack, or null 3155// if only code from the null class loader is on the stack. 3156 3157JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env)) 3158 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3159 // UseNewReflection 3160 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection 3161 klassOop holder = vfst.method()->method_holder(); 3162 oop loader = instanceKlass::cast(holder)->class_loader(); 3163 if (loader != NULL) { 3164 return JNIHandles::make_local(env, loader); 3165 } 3166 } 3167 return NULL; 3168JVM_END 3169 3170 3171// Load a class relative to the most recent class on the stack with a non-null 3172// classloader. 3173// This function has been deprecated and should not be considered part of the 3174// specified JVM interface. 3175 3176JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver, 3177 jclass currClass, jstring currClassName)) 3178 JVMWrapper("JVM_LoadClass0"); 3179 // Receiver is not used 3180 ResourceMark rm(THREAD); 3181 3182 // Class name argument is not guaranteed to be in internal format 3183 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName)); 3184 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL); 3185 3186 const char* str = java_lang_String::as_utf8_string(string()); 3187 3188 if (str == NULL || (int)strlen(str) > symbolOopDesc::max_length()) { 3189 // It's impossible to create this class; the name cannot fit 3190 // into the constant pool. 3191 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str); 3192 } 3193 3194 symbolHandle name = oopFactory::new_symbol_handle(str, CHECK_NULL); 3195 Handle curr_klass (THREAD, JNIHandles::resolve(currClass)); 3196 // Find the most recent class on the stack with a non-null classloader 3197 oop loader = NULL; 3198 oop protection_domain = NULL; 3199 if (curr_klass.is_null()) { 3200 for (vframeStream vfst(thread); 3201 !vfst.at_end() && loader == NULL; 3202 vfst.next()) { 3203 if (!vfst.method()->is_native()) { 3204 klassOop holder = vfst.method()->method_holder(); 3205 loader = instanceKlass::cast(holder)->class_loader(); 3206 protection_domain = instanceKlass::cast(holder)->protection_domain(); 3207 } 3208 } 3209 } else { 3210 klassOop curr_klass_oop = java_lang_Class::as_klassOop(curr_klass()); 3211 loader = instanceKlass::cast(curr_klass_oop)->class_loader(); 3212 protection_domain = instanceKlass::cast(curr_klass_oop)->protection_domain(); 3213 } 3214 Handle h_loader(THREAD, loader); 3215 Handle h_prot (THREAD, protection_domain); 3216 return find_class_from_class_loader(env, name, true, h_loader, h_prot, 3217 false, thread); 3218JVM_END 3219 3220 3221// Array /////////////////////////////////////////////////////////////////////////////////////////// 3222 3223 3224// resolve array handle and check arguments 3225static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) { 3226 if (arr == NULL) { 3227 THROW_0(vmSymbols::java_lang_NullPointerException()); 3228 } 3229 oop a = JNIHandles::resolve_non_null(arr); 3230 if (!a->is_javaArray() || (type_array_only && !a->is_typeArray())) { 3231 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array"); 3232 } 3233 return arrayOop(a); 3234} 3235 3236 3237JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr)) 3238 JVMWrapper("JVM_GetArrayLength"); 3239 arrayOop a = check_array(env, arr, false, CHECK_0); 3240 return a->length(); 3241JVM_END 3242 3243 3244JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index)) 3245 JVMWrapper("JVM_Array_Get"); 3246 JvmtiVMObjectAllocEventCollector oam; 3247 arrayOop a = check_array(env, arr, false, CHECK_NULL); 3248 jvalue value; 3249 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL); 3250 oop box = Reflection::box(&value, type, CHECK_NULL); 3251 return JNIHandles::make_local(env, box); 3252JVM_END 3253 3254 3255JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode)) 3256 JVMWrapper("JVM_GetPrimitiveArrayElement"); 3257 jvalue value; 3258 value.i = 0; // to initialize value before getting used in CHECK 3259 arrayOop a = check_array(env, arr, true, CHECK_(value)); 3260 assert(a->is_typeArray(), "just checking"); 3261 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value)); 3262 BasicType wide_type = (BasicType) wCode; 3263 if (type != wide_type) { 3264 Reflection::widen(&value, type, wide_type, CHECK_(value)); 3265 } 3266 return value; 3267JVM_END 3268 3269 3270JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val)) 3271 JVMWrapper("JVM_SetArrayElement"); 3272 arrayOop a = check_array(env, arr, false, CHECK); 3273 oop box = JNIHandles::resolve(val); 3274 jvalue value; 3275 value.i = 0; // to initialize value before getting used in CHECK 3276 BasicType value_type; 3277 if (a->is_objArray()) { 3278 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array 3279 value_type = Reflection::unbox_for_regular_object(box, &value); 3280 } else { 3281 value_type = Reflection::unbox_for_primitive(box, &value, CHECK); 3282 } 3283 Reflection::array_set(&value, a, index, value_type, CHECK); 3284JVM_END 3285 3286 3287JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode)) 3288 JVMWrapper("JVM_SetPrimitiveArrayElement"); 3289 arrayOop a = check_array(env, arr, true, CHECK); 3290 assert(a->is_typeArray(), "just checking"); 3291 BasicType value_type = (BasicType) vCode; 3292 Reflection::array_set(&v, a, index, value_type, CHECK); 3293JVM_END 3294 3295 3296JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length)) 3297 JVMWrapper("JVM_NewArray"); 3298 JvmtiVMObjectAllocEventCollector oam; 3299 oop element_mirror = JNIHandles::resolve(eltClass); 3300 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL); 3301 return JNIHandles::make_local(env, result); 3302JVM_END 3303 3304 3305JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim)) 3306 JVMWrapper("JVM_NewMultiArray"); 3307 JvmtiVMObjectAllocEventCollector oam; 3308 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL); 3309 oop element_mirror = JNIHandles::resolve(eltClass); 3310 assert(dim_array->is_typeArray(), "just checking"); 3311 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL); 3312 return JNIHandles::make_local(env, result); 3313JVM_END 3314 3315 3316// Networking library support //////////////////////////////////////////////////////////////////// 3317 3318JVM_LEAF(jint, JVM_InitializeSocketLibrary()) 3319 JVMWrapper("JVM_InitializeSocketLibrary"); 3320 return hpi::initialize_socket_library(); 3321JVM_END 3322 3323 3324JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol)) 3325 JVMWrapper("JVM_Socket"); 3326 return hpi::socket(domain, type, protocol); 3327JVM_END 3328 3329 3330JVM_LEAF(jint, JVM_SocketClose(jint fd)) 3331 JVMWrapper2("JVM_SocketClose (0x%x)", fd); 3332 //%note jvm_r6 3333 return hpi::socket_close(fd); 3334JVM_END 3335 3336 3337JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto)) 3338 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd); 3339 //%note jvm_r6 3340 return hpi::socket_shutdown(fd, howto); 3341JVM_END 3342 3343 3344JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags)) 3345 JVMWrapper2("JVM_Recv (0x%x)", fd); 3346 //%note jvm_r6 3347 return hpi::recv(fd, buf, nBytes, flags); 3348JVM_END 3349 3350 3351JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags)) 3352 JVMWrapper2("JVM_Send (0x%x)", fd); 3353 //%note jvm_r6 3354 return hpi::send(fd, buf, nBytes, flags); 3355JVM_END 3356 3357 3358JVM_LEAF(jint, JVM_Timeout(int fd, long timeout)) 3359 JVMWrapper2("JVM_Timeout (0x%x)", fd); 3360 //%note jvm_r6 3361 return hpi::timeout(fd, timeout); 3362JVM_END 3363 3364 3365JVM_LEAF(jint, JVM_Listen(jint fd, jint count)) 3366 JVMWrapper2("JVM_Listen (0x%x)", fd); 3367 //%note jvm_r6 3368 return hpi::listen(fd, count); 3369JVM_END 3370 3371 3372JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len)) 3373 JVMWrapper2("JVM_Connect (0x%x)", fd); 3374 //%note jvm_r6 3375 return hpi::connect(fd, him, len); 3376JVM_END 3377 3378 3379JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len)) 3380 JVMWrapper2("JVM_Bind (0x%x)", fd); 3381 //%note jvm_r6 3382 return hpi::bind(fd, him, len); 3383JVM_END 3384 3385 3386JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len)) 3387 JVMWrapper2("JVM_Accept (0x%x)", fd); 3388 //%note jvm_r6 3389 return hpi::accept(fd, him, (int *)len); 3390JVM_END 3391 3392 3393JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen)) 3394 JVMWrapper2("JVM_RecvFrom (0x%x)", fd); 3395 //%note jvm_r6 3396 return hpi::recvfrom(fd, buf, nBytes, flags, from, fromlen); 3397JVM_END 3398 3399 3400JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len)) 3401 JVMWrapper2("JVM_GetSockName (0x%x)", fd); 3402 //%note jvm_r6 3403 return hpi::get_sock_name(fd, him, len); 3404JVM_END 3405 3406 3407JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen)) 3408 JVMWrapper2("JVM_SendTo (0x%x)", fd); 3409 //%note jvm_r6 3410 return hpi::sendto(fd, buf, len, flags, to, tolen); 3411JVM_END 3412 3413 3414JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes)) 3415 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd); 3416 //%note jvm_r6 3417 return hpi::socket_available(fd, pbytes); 3418JVM_END 3419 3420 3421JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen)) 3422 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); 3423 //%note jvm_r6 3424 return hpi::get_sock_opt(fd, level, optname, optval, optlen); 3425JVM_END 3426 3427 3428JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen)) 3429 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); 3430 //%note jvm_r6 3431 return hpi::set_sock_opt(fd, level, optname, optval, optlen); 3432JVM_END 3433 3434JVM_LEAF(int, JVM_GetHostName(char* name, int namelen)) 3435 JVMWrapper("JVM_GetHostName"); 3436 return hpi::get_host_name(name, namelen); 3437JVM_END 3438 3439#ifdef _WINDOWS 3440 3441JVM_LEAF(struct hostent*, JVM_GetHostByAddr(const char* name, int len, int type)) 3442 JVMWrapper("JVM_GetHostByAddr"); 3443 return hpi::get_host_by_addr(name, len, type); 3444JVM_END 3445 3446 3447JVM_LEAF(struct hostent*, JVM_GetHostByName(char* name)) 3448 JVMWrapper("JVM_GetHostByName"); 3449 return hpi::get_host_by_name(name); 3450JVM_END 3451 3452 3453JVM_LEAF(struct protoent*, JVM_GetProtoByName(char* name)) 3454 JVMWrapper("JVM_GetProtoByName"); 3455 return hpi::get_proto_by_name(name); 3456JVM_END 3457 3458#endif 3459 3460// Library support /////////////////////////////////////////////////////////////////////////// 3461 3462JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name)) 3463 //%note jvm_ct 3464 JVMWrapper2("JVM_LoadLibrary (%s)", name); 3465 char ebuf[1024]; 3466 void *load_result; 3467 { 3468 ThreadToNativeFromVM ttnfvm(thread); 3469 load_result = hpi::dll_load(name, ebuf, sizeof ebuf); 3470 } 3471 if (load_result == NULL) { 3472 char msg[1024]; 3473 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf); 3474 // Since 'ebuf' may contain a string encoded using 3475 // platform encoding scheme, we need to pass 3476 // Exceptions::unsafe_to_utf8 to the new_exception method 3477 // as the last argument. See bug 6367357. 3478 Handle h_exception = 3479 Exceptions::new_exception(thread, 3480 vmSymbols::java_lang_UnsatisfiedLinkError(), 3481 msg, Exceptions::unsafe_to_utf8); 3482 3483 THROW_HANDLE_0(h_exception); 3484 } 3485 return load_result; 3486JVM_END 3487 3488 3489JVM_LEAF(void, JVM_UnloadLibrary(void* handle)) 3490 JVMWrapper("JVM_UnloadLibrary"); 3491 hpi::dll_unload(handle); 3492JVM_END 3493 3494 3495JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name)) 3496 JVMWrapper2("JVM_FindLibraryEntry (%s)", name); 3497 return hpi::dll_lookup(handle, name); 3498JVM_END 3499 3500// Floating point support //////////////////////////////////////////////////////////////////// 3501 3502JVM_LEAF(jboolean, JVM_IsNaN(jdouble a)) 3503 JVMWrapper("JVM_IsNaN"); 3504 return g_isnan(a); 3505JVM_END 3506 3507 3508 3509// JNI version /////////////////////////////////////////////////////////////////////////////// 3510 3511JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version)) 3512 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version); 3513 return Threads::is_supported_jni_version_including_1_1(version); 3514JVM_END 3515 3516 3517// String support /////////////////////////////////////////////////////////////////////////// 3518 3519JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str)) 3520 JVMWrapper("JVM_InternString"); 3521 JvmtiVMObjectAllocEventCollector oam; 3522 if (str == NULL) return NULL; 3523 oop string = JNIHandles::resolve_non_null(str); 3524 oop result = StringTable::intern(string, CHECK_NULL); 3525 return (jstring) JNIHandles::make_local(env, result); 3526JVM_END 3527 3528 3529// Raw monitor support ////////////////////////////////////////////////////////////////////// 3530 3531// The lock routine below calls lock_without_safepoint_check in order to get a raw lock 3532// without interfering with the safepoint mechanism. The routines are not JVM_LEAF because 3533// they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check 3534// that only works with java threads. 3535 3536 3537JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) { 3538 VM_Exit::block_if_vm_exited(); 3539 JVMWrapper("JVM_RawMonitorCreate"); 3540 return new Mutex(Mutex::native, "JVM_RawMonitorCreate"); 3541} 3542 3543 3544JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) { 3545 VM_Exit::block_if_vm_exited(); 3546 JVMWrapper("JVM_RawMonitorDestroy"); 3547 delete ((Mutex*) mon); 3548} 3549 3550 3551JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) { 3552 VM_Exit::block_if_vm_exited(); 3553 JVMWrapper("JVM_RawMonitorEnter"); 3554 ((Mutex*) mon)->jvm_raw_lock(); 3555 return 0; 3556} 3557 3558 3559JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) { 3560 VM_Exit::block_if_vm_exited(); 3561 JVMWrapper("JVM_RawMonitorExit"); 3562 ((Mutex*) mon)->jvm_raw_unlock(); 3563} 3564 3565 3566// Support for Serialization 3567 3568typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value); 3569typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value); 3570typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value); 3571typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value); 3572 3573static IntBitsToFloatFn int_bits_to_float_fn = NULL; 3574static LongBitsToDoubleFn long_bits_to_double_fn = NULL; 3575static FloatToIntBitsFn float_to_int_bits_fn = NULL; 3576static DoubleToLongBitsFn double_to_long_bits_fn = NULL; 3577 3578 3579void initialize_converter_functions() { 3580 if (JDK_Version::is_gte_jdk14x_version()) { 3581 // These functions only exist for compatibility with 1.3.1 and earlier 3582 return; 3583 } 3584 3585 // called from universe_post_init() 3586 assert( 3587 int_bits_to_float_fn == NULL && 3588 long_bits_to_double_fn == NULL && 3589 float_to_int_bits_fn == NULL && 3590 double_to_long_bits_fn == NULL , 3591 "initialization done twice" 3592 ); 3593 // initialize 3594 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F")); 3595 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D")); 3596 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I")); 3597 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J")); 3598 // verify 3599 assert( 3600 int_bits_to_float_fn != NULL && 3601 long_bits_to_double_fn != NULL && 3602 float_to_int_bits_fn != NULL && 3603 double_to_long_bits_fn != NULL , 3604 "initialization failed" 3605 ); 3606} 3607 3608 3609// Serialization 3610JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj, 3611 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data)) 3612 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier"); 3613 3614 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes)); 3615 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data)); 3616 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs)); 3617 oop o = JNIHandles::resolve(obj); 3618 3619 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) { 3620 THROW(vmSymbols::java_lang_NullPointerException()); 3621 } 3622 3623 jsize nfids = fids->length(); 3624 if (nfids == 0) return; 3625 3626 if (tcodes->length() < nfids) { 3627 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); 3628 } 3629 3630 jsize off = 0; 3631 /* loop through fields, setting values */ 3632 for (jsize i = 0; i < nfids; i++) { 3633 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i); 3634 int field_offset; 3635 if (fid != NULL) { 3636 // NULL is a legal value for fid, but retrieving the field offset 3637 // trigger assertion in that case 3638 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); 3639 } 3640 3641 switch (tcodes->char_at(i)) { 3642 case 'Z': 3643 if (fid != NULL) { 3644 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE; 3645 o->bool_field_put(field_offset, val); 3646 } 3647 off++; 3648 break; 3649 3650 case 'B': 3651 if (fid != NULL) { 3652 o->byte_field_put(field_offset, dbuf->byte_at(off)); 3653 } 3654 off++; 3655 break; 3656 3657 case 'C': 3658 if (fid != NULL) { 3659 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8) 3660 + ((dbuf->byte_at(off + 1) & 0xFF) << 0); 3661 o->char_field_put(field_offset, val); 3662 } 3663 off += 2; 3664 break; 3665 3666 case 'S': 3667 if (fid != NULL) { 3668 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8) 3669 + ((dbuf->byte_at(off + 1) & 0xFF) << 0); 3670 o->short_field_put(field_offset, val); 3671 } 3672 off += 2; 3673 break; 3674 3675 case 'I': 3676 if (fid != NULL) { 3677 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24) 3678 + ((dbuf->byte_at(off + 1) & 0xFF) << 16) 3679 + ((dbuf->byte_at(off + 2) & 0xFF) << 8) 3680 + ((dbuf->byte_at(off + 3) & 0xFF) << 0); 3681 o->int_field_put(field_offset, ival); 3682 } 3683 off += 4; 3684 break; 3685 3686 case 'F': 3687 if (fid != NULL) { 3688 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24) 3689 + ((dbuf->byte_at(off + 1) & 0xFF) << 16) 3690 + ((dbuf->byte_at(off + 2) & 0xFF) << 8) 3691 + ((dbuf->byte_at(off + 3) & 0xFF) << 0); 3692 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival); 3693 o->float_field_put(field_offset, fval); 3694 } 3695 off += 4; 3696 break; 3697 3698 case 'J': 3699 if (fid != NULL) { 3700 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56) 3701 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48) 3702 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40) 3703 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32) 3704 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24) 3705 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16) 3706 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8) 3707 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0); 3708 o->long_field_put(field_offset, lval); 3709 } 3710 off += 8; 3711 break; 3712 3713 case 'D': 3714 if (fid != NULL) { 3715 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56) 3716 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48) 3717 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40) 3718 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32) 3719 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24) 3720 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16) 3721 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8) 3722 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0); 3723 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval); 3724 o->double_field_put(field_offset, dval); 3725 } 3726 off += 8; 3727 break; 3728 3729 default: 3730 // Illegal typecode 3731 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode"); 3732 } 3733 } 3734JVM_END 3735 3736 3737JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj, 3738 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data)) 3739 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier"); 3740 3741 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes)); 3742 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data)); 3743 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs)); 3744 oop o = JNIHandles::resolve(obj); 3745 3746 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) { 3747 THROW(vmSymbols::java_lang_NullPointerException()); 3748 } 3749 3750 jsize nfids = fids->length(); 3751 if (nfids == 0) return; 3752 3753 if (tcodes->length() < nfids) { 3754 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); 3755 } 3756 3757 /* loop through fields, fetching values */ 3758 jsize off = 0; 3759 for (jsize i = 0; i < nfids; i++) { 3760 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i); 3761 if (fid == NULL) { 3762 THROW(vmSymbols::java_lang_NullPointerException()); 3763 } 3764 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); 3765 3766 switch (tcodes->char_at(i)) { 3767 case 'Z': 3768 { 3769 jboolean val = o->bool_field(field_offset); 3770 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0); 3771 } 3772 break; 3773 3774 case 'B': 3775 dbuf->byte_at_put(off++, o->byte_field(field_offset)); 3776 break; 3777 3778 case 'C': 3779 { 3780 jchar val = o->char_field(field_offset); 3781 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 3782 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 3783 } 3784 break; 3785 3786 case 'S': 3787 { 3788 jshort val = o->short_field(field_offset); 3789 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 3790 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 3791 } 3792 break; 3793 3794 case 'I': 3795 { 3796 jint val = o->int_field(field_offset); 3797 dbuf->byte_at_put(off++, (val >> 24) & 0xFF); 3798 dbuf->byte_at_put(off++, (val >> 16) & 0xFF); 3799 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 3800 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 3801 } 3802 break; 3803 3804 case 'F': 3805 { 3806 jfloat fval = o->float_field(field_offset); 3807 jint ival = (*float_to_int_bits_fn)(env, NULL, fval); 3808 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF); 3809 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF); 3810 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF); 3811 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF); 3812 } 3813 break; 3814 3815 case 'J': 3816 { 3817 jlong val = o->long_field(field_offset); 3818 dbuf->byte_at_put(off++, (val >> 56) & 0xFF); 3819 dbuf->byte_at_put(off++, (val >> 48) & 0xFF); 3820 dbuf->byte_at_put(off++, (val >> 40) & 0xFF); 3821 dbuf->byte_at_put(off++, (val >> 32) & 0xFF); 3822 dbuf->byte_at_put(off++, (val >> 24) & 0xFF); 3823 dbuf->byte_at_put(off++, (val >> 16) & 0xFF); 3824 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 3825 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 3826 } 3827 break; 3828 3829 case 'D': 3830 { 3831 jdouble dval = o->double_field(field_offset); 3832 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval); 3833 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF); 3834 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF); 3835 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF); 3836 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF); 3837 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF); 3838 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF); 3839 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF); 3840 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF); 3841 } 3842 break; 3843 3844 default: 3845 // Illegal typecode 3846 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode"); 3847 } 3848 } 3849JVM_END 3850 3851 3852// Shared JNI/JVM entry points ////////////////////////////////////////////////////////////// 3853 3854jclass find_class_from_class_loader(JNIEnv* env, symbolHandle name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) { 3855 // Security Note: 3856 // The Java level wrapper will perform the necessary security check allowing 3857 // us to pass the NULL as the initiating class loader. 3858 klassOop klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL); 3859 KlassHandle klass_handle(THREAD, klass); 3860 // Check if we should initialize the class 3861 if (init && klass_handle->oop_is_instance()) { 3862 klass_handle->initialize(CHECK_NULL); 3863 } 3864 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror()); 3865} 3866 3867 3868// Internal SQE debugging support /////////////////////////////////////////////////////////// 3869 3870#ifndef PRODUCT 3871 3872extern "C" { 3873 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get); 3874 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get); 3875 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj); 3876} 3877 3878JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get)) 3879 JVMWrapper("JVM_AccessBoolVMFlag"); 3880 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL); 3881JVM_END 3882 3883JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get)) 3884 JVMWrapper("JVM_AccessVMIntFlag"); 3885 intx v; 3886 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL); 3887 *value = (jint)v; 3888 return result; 3889JVM_END 3890 3891 3892JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj)) 3893 JVMWrapper("JVM_VMBreakPoint"); 3894 oop the_obj = JNIHandles::resolve(obj); 3895 BREAKPOINT; 3896JVM_END 3897 3898 3899#endif 3900 3901 3902//--------------------------------------------------------------------------- 3903// 3904// Support for old native code-based reflection (pre-JDK 1.4) 3905// Disabled by default in the product build. 3906// 3907// See reflection.hpp for information on SUPPORT_OLD_REFLECTION 3908// 3909//--------------------------------------------------------------------------- 3910 3911#ifdef SUPPORT_OLD_REFLECTION 3912 3913JVM_ENTRY(jobjectArray, JVM_GetClassFields(JNIEnv *env, jclass cls, jint which)) 3914 JVMWrapper("JVM_GetClassFields"); 3915 JvmtiVMObjectAllocEventCollector oam; 3916 oop mirror = JNIHandles::resolve_non_null(cls); 3917 objArrayOop result = Reflection::reflect_fields(mirror, which, CHECK_NULL); 3918 return (jobjectArray) JNIHandles::make_local(env, result); 3919JVM_END 3920 3921 3922JVM_ENTRY(jobjectArray, JVM_GetClassMethods(JNIEnv *env, jclass cls, jint which)) 3923 JVMWrapper("JVM_GetClassMethods"); 3924 JvmtiVMObjectAllocEventCollector oam; 3925 oop mirror = JNIHandles::resolve_non_null(cls); 3926 objArrayOop result = Reflection::reflect_methods(mirror, which, CHECK_NULL); 3927 //%note jvm_r4 3928 return (jobjectArray) JNIHandles::make_local(env, result); 3929JVM_END 3930 3931 3932JVM_ENTRY(jobjectArray, JVM_GetClassConstructors(JNIEnv *env, jclass cls, jint which)) 3933 JVMWrapper("JVM_GetClassConstructors"); 3934 JvmtiVMObjectAllocEventCollector oam; 3935 oop mirror = JNIHandles::resolve_non_null(cls); 3936 objArrayOop result = Reflection::reflect_constructors(mirror, which, CHECK_NULL); 3937 //%note jvm_r4 3938 return (jobjectArray) JNIHandles::make_local(env, result); 3939JVM_END 3940 3941 3942JVM_ENTRY(jobject, JVM_GetClassField(JNIEnv *env, jclass cls, jstring name, jint which)) 3943 JVMWrapper("JVM_GetClassField"); 3944 JvmtiVMObjectAllocEventCollector oam; 3945 if (name == NULL) return NULL; 3946 Handle str (THREAD, JNIHandles::resolve_non_null(name)); 3947 3948 const char* cstr = java_lang_String::as_utf8_string(str()); 3949 symbolHandle field_name = 3950 symbolHandle(THREAD, SymbolTable::probe(cstr, (int)strlen(cstr))); 3951 if (field_name.is_null()) { 3952 THROW_0(vmSymbols::java_lang_NoSuchFieldException()); 3953 } 3954 3955 oop mirror = JNIHandles::resolve_non_null(cls); 3956 oop result = Reflection::reflect_field(mirror, field_name(), which, CHECK_NULL); 3957 if (result == NULL) { 3958 THROW_0(vmSymbols::java_lang_NoSuchFieldException()); 3959 } 3960 return JNIHandles::make_local(env, result); 3961JVM_END 3962 3963 3964JVM_ENTRY(jobject, JVM_GetClassMethod(JNIEnv *env, jclass cls, jstring name, jobjectArray types, jint which)) 3965 JVMWrapper("JVM_GetClassMethod"); 3966 JvmtiVMObjectAllocEventCollector oam; 3967 if (name == NULL) { 3968 THROW_0(vmSymbols::java_lang_NullPointerException()); 3969 } 3970 Handle str (THREAD, JNIHandles::resolve_non_null(name)); 3971 3972 const char* cstr = java_lang_String::as_utf8_string(str()); 3973 symbolHandle method_name = 3974 symbolHandle(THREAD, SymbolTable::probe(cstr, (int)strlen(cstr))); 3975 if (method_name.is_null()) { 3976 THROW_0(vmSymbols::java_lang_NoSuchMethodException()); 3977 } 3978 3979 oop mirror = JNIHandles::resolve_non_null(cls); 3980 objArrayHandle tarray (THREAD, objArrayOop(JNIHandles::resolve(types))); 3981 oop result = Reflection::reflect_method(mirror, method_name, tarray, 3982 which, CHECK_NULL); 3983 if (result == NULL) { 3984 THROW_0(vmSymbols::java_lang_NoSuchMethodException()); 3985 } 3986 return JNIHandles::make_local(env, result); 3987JVM_END 3988 3989 3990JVM_ENTRY(jobject, JVM_GetClassConstructor(JNIEnv *env, jclass cls, jobjectArray types, jint which)) 3991 JVMWrapper("JVM_GetClassConstructor"); 3992 JvmtiVMObjectAllocEventCollector oam; 3993 oop mirror = JNIHandles::resolve_non_null(cls); 3994 objArrayHandle tarray (THREAD, objArrayOop(JNIHandles::resolve(types))); 3995 oop result = Reflection::reflect_constructor(mirror, tarray, which, CHECK_NULL); 3996 if (result == NULL) { 3997 THROW_0(vmSymbols::java_lang_NoSuchMethodException()); 3998 } 3999 return (jobject) JNIHandles::make_local(env, result); 4000JVM_END 4001 4002 4003// Instantiation /////////////////////////////////////////////////////////////////////////////// 4004 4005JVM_ENTRY(jobject, JVM_NewInstance(JNIEnv *env, jclass cls)) 4006 JVMWrapper("JVM_NewInstance"); 4007 Handle mirror(THREAD, JNIHandles::resolve_non_null(cls)); 4008 4009 methodOop resolved_constructor = java_lang_Class::resolved_constructor(mirror()); 4010 if (resolved_constructor == NULL) { 4011 klassOop k = java_lang_Class::as_klassOop(mirror()); 4012 // The java.lang.Class object caches a resolved constructor if all the checks 4013 // below were done successfully and a constructor was found. 4014 4015 // Do class based checks 4016 if (java_lang_Class::is_primitive(mirror())) { 4017 const char* msg = ""; 4018 if (mirror == Universe::bool_mirror()) msg = "java/lang/Boolean"; 4019 else if (mirror == Universe::char_mirror()) msg = "java/lang/Character"; 4020 else if (mirror == Universe::float_mirror()) msg = "java/lang/Float"; 4021 else if (mirror == Universe::double_mirror()) msg = "java/lang/Double"; 4022 else if (mirror == Universe::byte_mirror()) msg = "java/lang/Byte"; 4023 else if (mirror == Universe::short_mirror()) msg = "java/lang/Short"; 4024 else if (mirror == Universe::int_mirror()) msg = "java/lang/Integer"; 4025 else if (mirror == Universe::long_mirror()) msg = "java/lang/Long"; 4026 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), msg); 4027 } 4028 4029 // Check whether we are allowed to instantiate this class 4030 Klass::cast(k)->check_valid_for_instantiation(false, CHECK_NULL); // Array classes get caught here 4031 instanceKlassHandle klass(THREAD, k); 4032 // Make sure class is initialized (also so all methods are rewritten) 4033 klass->initialize(CHECK_NULL); 4034 4035 // Lookup default constructor 4036 resolved_constructor = klass->find_method(vmSymbols::object_initializer_name(), vmSymbols::void_method_signature()); 4037 if (resolved_constructor == NULL) { 4038 ResourceMark rm(THREAD); 4039 THROW_MSG_0(vmSymbols::java_lang_InstantiationException(), klass->external_name()); 4040 } 4041 4042 // Cache result in java.lang.Class object. Does not have to be MT safe. 4043 java_lang_Class::set_resolved_constructor(mirror(), resolved_constructor); 4044 } 4045 4046 assert(resolved_constructor != NULL, "sanity check"); 4047 methodHandle constructor = methodHandle(THREAD, resolved_constructor); 4048 4049 // We have an initialized instanceKlass with a default constructor 4050 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls))); 4051 assert(klass->is_initialized() || klass->is_being_initialized(), "sanity check"); 4052 4053 // Do security check 4054 klassOop caller_klass = NULL; 4055 if (UsePrivilegedStack) { 4056 caller_klass = thread->security_get_caller_class(2); 4057 4058 if (!Reflection::verify_class_access(caller_klass, klass(), false) || 4059 !Reflection::verify_field_access(caller_klass, 4060 klass(), 4061 klass(), 4062 constructor->access_flags(), 4063 false, 4064 true)) { 4065 ResourceMark rm(THREAD); 4066 THROW_MSG_0(vmSymbols::java_lang_IllegalAccessException(), klass->external_name()); 4067 } 4068 } 4069 4070 // Allocate object and call constructor 4071 Handle receiver = klass->allocate_instance_handle(CHECK_NULL); 4072 JavaCalls::call_default_constructor(thread, constructor, receiver, CHECK_NULL); 4073 4074 jobject res = JNIHandles::make_local(env, receiver()); 4075 if (JvmtiExport::should_post_vm_object_alloc()) { 4076 JvmtiExport::post_vm_object_alloc(JavaThread::current(), receiver()); 4077 } 4078 return res; 4079JVM_END 4080 4081 4082// Field //////////////////////////////////////////////////////////////////////////////////////////// 4083 4084JVM_ENTRY(jobject, JVM_GetField(JNIEnv *env, jobject field, jobject obj)) 4085 JVMWrapper("JVM_GetField"); 4086 JvmtiVMObjectAllocEventCollector oam; 4087 Handle field_mirror(thread, JNIHandles::resolve(field)); 4088 Handle receiver (thread, JNIHandles::resolve(obj)); 4089 fieldDescriptor fd; 4090 Reflection::resolve_field(field_mirror, receiver, &fd, false, CHECK_NULL); 4091 jvalue value; 4092 BasicType type = Reflection::field_get(&value, &fd, receiver); 4093 oop box = Reflection::box(&value, type, CHECK_NULL); 4094 return JNIHandles::make_local(env, box); 4095JVM_END 4096 4097 4098JVM_ENTRY(jvalue, JVM_GetPrimitiveField(JNIEnv *env, jobject field, jobject obj, unsigned char wCode)) 4099 JVMWrapper("JVM_GetPrimitiveField"); 4100 Handle field_mirror(thread, JNIHandles::resolve(field)); 4101 Handle receiver (thread, JNIHandles::resolve(obj)); 4102 fieldDescriptor fd; 4103 jvalue value; 4104 value.j = 0; 4105 Reflection::resolve_field(field_mirror, receiver, &fd, false, CHECK_(value)); 4106 BasicType type = Reflection::field_get(&value, &fd, receiver); 4107 BasicType wide_type = (BasicType) wCode; 4108 if (type != wide_type) { 4109 Reflection::widen(&value, type, wide_type, CHECK_(value)); 4110 } 4111 return value; 4112JVM_END // should really be JVM_END, but that doesn't work for union types! 4113 4114 4115JVM_ENTRY(void, JVM_SetField(JNIEnv *env, jobject field, jobject obj, jobject val)) 4116 JVMWrapper("JVM_SetField"); 4117 Handle field_mirror(thread, JNIHandles::resolve(field)); 4118 Handle receiver (thread, JNIHandles::resolve(obj)); 4119 oop box = JNIHandles::resolve(val); 4120 fieldDescriptor fd; 4121 Reflection::resolve_field(field_mirror, receiver, &fd, true, CHECK); 4122 BasicType field_type = fd.field_type(); 4123 jvalue value; 4124 BasicType value_type; 4125 if (field_type == T_OBJECT || field_type == T_ARRAY) { 4126 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array 4127 value_type = Reflection::unbox_for_regular_object(box, &value); 4128 Reflection::field_set(&value, &fd, receiver, field_type, CHECK); 4129 } else { 4130 value_type = Reflection::unbox_for_primitive(box, &value, CHECK); 4131 Reflection::field_set(&value, &fd, receiver, value_type, CHECK); 4132 } 4133JVM_END 4134 4135 4136JVM_ENTRY(void, JVM_SetPrimitiveField(JNIEnv *env, jobject field, jobject obj, jvalue v, unsigned char vCode)) 4137 JVMWrapper("JVM_SetPrimitiveField"); 4138 Handle field_mirror(thread, JNIHandles::resolve(field)); 4139 Handle receiver (thread, JNIHandles::resolve(obj)); 4140 fieldDescriptor fd; 4141 Reflection::resolve_field(field_mirror, receiver, &fd, true, CHECK); 4142 BasicType value_type = (BasicType) vCode; 4143 Reflection::field_set(&v, &fd, receiver, value_type, CHECK); 4144JVM_END 4145 4146 4147// Method /////////////////////////////////////////////////////////////////////////////////////////// 4148 4149JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0)) 4150 JVMWrapper("JVM_InvokeMethod"); 4151 Handle method_handle; 4152 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) { 4153 method_handle = Handle(THREAD, JNIHandles::resolve(method)); 4154 Handle receiver(THREAD, JNIHandles::resolve(obj)); 4155 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); 4156 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL); 4157 jobject res = JNIHandles::make_local(env, result); 4158 if (JvmtiExport::should_post_vm_object_alloc()) { 4159 oop ret_type = java_lang_reflect_Method::return_type(method_handle()); 4160 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!"); 4161 if (java_lang_Class::is_primitive(ret_type)) { 4162 // Only for primitive type vm allocates memory for java object. 4163 // See box() method. 4164 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); 4165 } 4166 } 4167 return res; 4168 } else { 4169 THROW_0(vmSymbols::java_lang_StackOverflowError()); 4170 } 4171JVM_END 4172 4173 4174JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0)) 4175 JVMWrapper("JVM_NewInstanceFromConstructor"); 4176 oop constructor_mirror = JNIHandles::resolve(c); 4177 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); 4178 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL); 4179 jobject res = JNIHandles::make_local(env, result); 4180 if (JvmtiExport::should_post_vm_object_alloc()) { 4181 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); 4182 } 4183 return res; 4184JVM_END 4185 4186#endif /* SUPPORT_OLD_REFLECTION */ 4187 4188// Atomic /////////////////////////////////////////////////////////////////////////////////////////// 4189 4190JVM_LEAF(jboolean, JVM_SupportsCX8()) 4191 JVMWrapper("JVM_SupportsCX8"); 4192 return VM_Version::supports_cx8(); 4193JVM_END 4194 4195 4196JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal)) 4197 JVMWrapper("JVM_CX8Field"); 4198 jlong res; 4199 oop o = JNIHandles::resolve(obj); 4200 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); 4201 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs); 4202 4203 assert(VM_Version::supports_cx8(), "cx8 not supported"); 4204 res = Atomic::cmpxchg(newVal, addr, oldVal); 4205 4206 return res == oldVal; 4207JVM_END 4208 4209// DTrace /////////////////////////////////////////////////////////////////// 4210 4211JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env)) 4212 JVMWrapper("JVM_DTraceGetVersion"); 4213 return (jint)JVM_TRACING_DTRACE_VERSION; 4214JVM_END 4215 4216JVM_ENTRY(jlong,JVM_DTraceActivate( 4217 JNIEnv* env, jint version, jstring module_name, jint providers_count, 4218 JVM_DTraceProvider* providers)) 4219 JVMWrapper("JVM_DTraceActivate"); 4220 return DTraceJSDT::activate( 4221 version, module_name, providers_count, providers, CHECK_0); 4222JVM_END 4223 4224JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method)) 4225 JVMWrapper("JVM_DTraceIsProbeEnabled"); 4226 return DTraceJSDT::is_probe_enabled(method); 4227JVM_END 4228 4229JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle)) 4230 JVMWrapper("JVM_DTraceDispose"); 4231 DTraceJSDT::dispose(handle); 4232JVM_END 4233 4234JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env)) 4235 JVMWrapper("JVM_DTraceIsSupported"); 4236 return DTraceJSDT::is_supported(); 4237JVM_END 4238 4239// Returns an array of all live Thread objects (VM internal JavaThreads, 4240// jvmti agent threads, and JNI attaching threads are skipped) 4241// See CR 6404306 regarding JNI attaching threads 4242JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy)) 4243 ResourceMark rm(THREAD); 4244 ThreadsListEnumerator tle(THREAD, false, false); 4245 JvmtiVMObjectAllocEventCollector oam; 4246 4247 int num_threads = tle.num_threads(); 4248 objArrayOop r = oopFactory::new_objArray(SystemDictionary::thread_klass(), num_threads, CHECK_NULL); 4249 objArrayHandle threads_ah(THREAD, r); 4250 4251 for (int i = 0; i < num_threads; i++) { 4252 Handle h = tle.get_threadObj(i); 4253 threads_ah->obj_at_put(i, h()); 4254 } 4255 4256 return (jobjectArray) JNIHandles::make_local(env, threads_ah()); 4257JVM_END 4258 4259 4260// Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods 4261// Return StackTraceElement[][], each element is the stack trace of a thread in 4262// the corresponding entry in the given threads array 4263JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads)) 4264 JVMWrapper("JVM_DumpThreads"); 4265 JvmtiVMObjectAllocEventCollector oam; 4266 4267 // Check if threads is null 4268 if (threads == NULL) { 4269 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 4270 } 4271 4272 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads)); 4273 objArrayHandle ah(THREAD, a); 4274 int num_threads = ah->length(); 4275 // check if threads is non-empty array 4276 if (num_threads == 0) { 4277 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); 4278 } 4279 4280 // check if threads is not an array of objects of Thread class 4281 klassOop k = objArrayKlass::cast(ah->klass())->element_klass(); 4282 if (k != SystemDictionary::thread_klass()) { 4283 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); 4284 } 4285 4286 ResourceMark rm(THREAD); 4287 4288 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); 4289 for (int i = 0; i < num_threads; i++) { 4290 oop thread_obj = ah->obj_at(i); 4291 instanceHandle h(THREAD, (instanceOop) thread_obj); 4292 thread_handle_array->append(h); 4293 } 4294 4295 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL); 4296 return (jobjectArray)JNIHandles::make_local(env, stacktraces()); 4297 4298JVM_END 4299 4300// JVM monitoring and management support 4301JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version)) 4302 return Management::get_jmm_interface(version); 4303JVM_END 4304 4305// com.sun.tools.attach.VirtualMachine agent properties support 4306// 4307// Initialize the agent properties with the properties maintained in the VM 4308JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties)) 4309 JVMWrapper("JVM_InitAgentProperties"); 4310 ResourceMark rm; 4311 4312 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); 4313 4314 PUTPROP(props, "sun.java.command", Arguments::java_command()); 4315 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags()); 4316 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args()); 4317 return properties; 4318JVM_END 4319 4320JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass)) 4321{ 4322 JVMWrapper("JVM_GetEnclosingMethodInfo"); 4323 JvmtiVMObjectAllocEventCollector oam; 4324 4325 if (ofClass == NULL) { 4326 return NULL; 4327 } 4328 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass)); 4329 // Special handling for primitive objects 4330 if (java_lang_Class::is_primitive(mirror())) { 4331 return NULL; 4332 } 4333 klassOop k = java_lang_Class::as_klassOop(mirror()); 4334 if (!Klass::cast(k)->oop_is_instance()) { 4335 return NULL; 4336 } 4337 instanceKlassHandle ik_h(THREAD, k); 4338 int encl_method_class_idx = ik_h->enclosing_method_class_index(); 4339 if (encl_method_class_idx == 0) { 4340 return NULL; 4341 } 4342 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::object_klass(), 3, CHECK_NULL); 4343 objArrayHandle dest(THREAD, dest_o); 4344 klassOop enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL); 4345 dest->obj_at_put(0, Klass::cast(enc_k)->java_mirror()); 4346 int encl_method_method_idx = ik_h->enclosing_method_method_index(); 4347 if (encl_method_method_idx != 0) { 4348 symbolOop sym_o = ik_h->constants()->symbol_at( 4349 extract_low_short_from_int( 4350 ik_h->constants()->name_and_type_at(encl_method_method_idx))); 4351 symbolHandle sym(THREAD, sym_o); 4352 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 4353 dest->obj_at_put(1, str()); 4354 sym_o = ik_h->constants()->symbol_at( 4355 extract_high_short_from_int( 4356 ik_h->constants()->name_and_type_at(encl_method_method_idx))); 4357 sym = symbolHandle(THREAD, sym_o); 4358 str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 4359 dest->obj_at_put(2, str()); 4360 } 4361 return (jobjectArray) JNIHandles::make_local(dest()); 4362} 4363JVM_END 4364 4365JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env, 4366 jint javaThreadState)) 4367{ 4368 // If new thread states are added in future JDK and VM versions, 4369 // this should check if the JDK version is compatible with thread 4370 // states supported by the VM. Return NULL if not compatible. 4371 // 4372 // This function must map the VM java_lang_Thread::ThreadStatus 4373 // to the Java thread state that the JDK supports. 4374 // 4375 4376 typeArrayHandle values_h; 4377 switch (javaThreadState) { 4378 case JAVA_THREAD_STATE_NEW : { 4379 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4380 values_h = typeArrayHandle(THREAD, r); 4381 values_h->int_at_put(0, java_lang_Thread::NEW); 4382 break; 4383 } 4384 case JAVA_THREAD_STATE_RUNNABLE : { 4385 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4386 values_h = typeArrayHandle(THREAD, r); 4387 values_h->int_at_put(0, java_lang_Thread::RUNNABLE); 4388 break; 4389 } 4390 case JAVA_THREAD_STATE_BLOCKED : { 4391 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4392 values_h = typeArrayHandle(THREAD, r); 4393 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER); 4394 break; 4395 } 4396 case JAVA_THREAD_STATE_WAITING : { 4397 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL); 4398 values_h = typeArrayHandle(THREAD, r); 4399 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT); 4400 values_h->int_at_put(1, java_lang_Thread::PARKED); 4401 break; 4402 } 4403 case JAVA_THREAD_STATE_TIMED_WAITING : { 4404 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL); 4405 values_h = typeArrayHandle(THREAD, r); 4406 values_h->int_at_put(0, java_lang_Thread::SLEEPING); 4407 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED); 4408 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED); 4409 break; 4410 } 4411 case JAVA_THREAD_STATE_TERMINATED : { 4412 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4413 values_h = typeArrayHandle(THREAD, r); 4414 values_h->int_at_put(0, java_lang_Thread::TERMINATED); 4415 break; 4416 } 4417 default: 4418 // Unknown state - probably incompatible JDK version 4419 return NULL; 4420 } 4421 4422 return (jintArray) JNIHandles::make_local(env, values_h()); 4423} 4424JVM_END 4425 4426 4427JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env, 4428 jint javaThreadState, 4429 jintArray values)) 4430{ 4431 // If new thread states are added in future JDK and VM versions, 4432 // this should check if the JDK version is compatible with thread 4433 // states supported by the VM. Return NULL if not compatible. 4434 // 4435 // This function must map the VM java_lang_Thread::ThreadStatus 4436 // to the Java thread state that the JDK supports. 4437 // 4438 4439 ResourceMark rm; 4440 4441 // Check if threads is null 4442 if (values == NULL) { 4443 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 4444 } 4445 4446 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values)); 4447 typeArrayHandle values_h(THREAD, v); 4448 4449 objArrayHandle names_h; 4450 switch (javaThreadState) { 4451 case JAVA_THREAD_STATE_NEW : { 4452 assert(values_h->length() == 1 && 4453 values_h->int_at(0) == java_lang_Thread::NEW, 4454 "Invalid threadStatus value"); 4455 4456 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(), 4457 1, /* only 1 substate */ 4458 CHECK_NULL); 4459 names_h = objArrayHandle(THREAD, r); 4460 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL); 4461 names_h->obj_at_put(0, name()); 4462 break; 4463 } 4464 case JAVA_THREAD_STATE_RUNNABLE : { 4465 assert(values_h->length() == 1 && 4466 values_h->int_at(0) == java_lang_Thread::RUNNABLE, 4467 "Invalid threadStatus value"); 4468 4469 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(), 4470 1, /* only 1 substate */ 4471 CHECK_NULL); 4472 names_h = objArrayHandle(THREAD, r); 4473 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL); 4474 names_h->obj_at_put(0, name()); 4475 break; 4476 } 4477 case JAVA_THREAD_STATE_BLOCKED : { 4478 assert(values_h->length() == 1 && 4479 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER, 4480 "Invalid threadStatus value"); 4481 4482 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(), 4483 1, /* only 1 substate */ 4484 CHECK_NULL); 4485 names_h = objArrayHandle(THREAD, r); 4486 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL); 4487 names_h->obj_at_put(0, name()); 4488 break; 4489 } 4490 case JAVA_THREAD_STATE_WAITING : { 4491 assert(values_h->length() == 2 && 4492 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT && 4493 values_h->int_at(1) == java_lang_Thread::PARKED, 4494 "Invalid threadStatus value"); 4495 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(), 4496 2, /* number of substates */ 4497 CHECK_NULL); 4498 names_h = objArrayHandle(THREAD, r); 4499 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT", 4500 CHECK_NULL); 4501 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED", 4502 CHECK_NULL); 4503 names_h->obj_at_put(0, name0()); 4504 names_h->obj_at_put(1, name1()); 4505 break; 4506 } 4507 case JAVA_THREAD_STATE_TIMED_WAITING : { 4508 assert(values_h->length() == 3 && 4509 values_h->int_at(0) == java_lang_Thread::SLEEPING && 4510 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED && 4511 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED, 4512 "Invalid threadStatus value"); 4513 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(), 4514 3, /* number of substates */ 4515 CHECK_NULL); 4516 names_h = objArrayHandle(THREAD, r); 4517 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING", 4518 CHECK_NULL); 4519 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT", 4520 CHECK_NULL); 4521 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED", 4522 CHECK_NULL); 4523 names_h->obj_at_put(0, name0()); 4524 names_h->obj_at_put(1, name1()); 4525 names_h->obj_at_put(2, name2()); 4526 break; 4527 } 4528 case JAVA_THREAD_STATE_TERMINATED : { 4529 assert(values_h->length() == 1 && 4530 values_h->int_at(0) == java_lang_Thread::TERMINATED, 4531 "Invalid threadStatus value"); 4532 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(), 4533 1, /* only 1 substate */ 4534 CHECK_NULL); 4535 names_h = objArrayHandle(THREAD, r); 4536 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL); 4537 names_h->obj_at_put(0, name()); 4538 break; 4539 } 4540 default: 4541 // Unknown state - probably incompatible JDK version 4542 return NULL; 4543 } 4544 return (jobjectArray) JNIHandles::make_local(env, names_h()); 4545} 4546JVM_END 4547 4548JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size)) 4549{ 4550 memset(info, 0, sizeof(info_size)); 4551 4552 info->jvm_version = Abstract_VM_Version::jvm_version(); 4553 info->update_version = 0; /* 0 in HotSpot Express VM */ 4554 info->special_update_version = 0; /* 0 in HotSpot Express VM */ 4555 4556 // when we add a new capability in the jvm_version_info struct, we should also 4557 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat 4558 // counter defined in runtimeService.cpp. 4559 info->is_attachable = AttachListener::is_attach_supported(); 4560#ifdef KERNEL 4561 info->is_kernel_jvm = 1; // true; 4562#else // KERNEL 4563 info->is_kernel_jvm = 0; // false; 4564#endif // KERNEL 4565} 4566JVM_END 4567 4568