jvm.cpp revision 6402:2377269bd73d
1235368Sgnn/* 2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25#include "precompiled.hpp" 26#include "classfile/classLoader.hpp" 27#include "classfile/javaAssertions.hpp" 28#include "classfile/javaClasses.hpp" 29#include "classfile/symbolTable.hpp" 30#include "classfile/systemDictionary.hpp" 31#include "classfile/vmSymbols.hpp" 32#include "gc_interface/collectedHeap.inline.hpp" 33#include "interpreter/bytecode.hpp" 34#include "memory/oopFactory.hpp" 35#include "memory/universe.inline.hpp" 36#include "oops/fieldStreams.hpp" 37#include "oops/instanceKlass.hpp" 38#include "oops/objArrayKlass.hpp" 39#include "oops/method.hpp" 40#include "prims/jvm.h" 41#include "prims/jvm_misc.hpp" 42#include "prims/jvmtiExport.hpp" 43#include "prims/jvmtiThreadState.hpp" 44#include "prims/nativeLookup.hpp" 45#include "prims/privilegedStack.hpp" 46#include "runtime/arguments.hpp" 47#include "runtime/dtraceJSDT.hpp" 48#include "runtime/handles.inline.hpp" 49#include "runtime/init.hpp" 50#include "runtime/interfaceSupport.hpp" 51#include "runtime/java.hpp" 52#include "runtime/javaCalls.hpp" 53#include "runtime/jfieldIDWorkaround.hpp" 54#include "runtime/orderAccess.inline.hpp" 55#include "runtime/os.hpp" 56#include "runtime/perfData.hpp" 57#include "runtime/reflection.hpp" 58#include "runtime/vframe.hpp" 59#include "runtime/vm_operations.hpp" 60#include "services/attachListener.hpp" 61#include "services/management.hpp" 62#include "services/threadService.hpp" 63#include "trace/tracing.hpp" 64#include "utilities/copy.hpp" 65#include "utilities/defaultStream.hpp" 66#include "utilities/dtrace.hpp" 67#include "utilities/events.hpp" 68#include "utilities/histogram.hpp" 69#include "utilities/top.hpp" 70#include "utilities/utf8.hpp" 71#ifdef TARGET_OS_FAMILY_linux 72# include "jvm_linux.h" 73#endif 74#ifdef TARGET_OS_FAMILY_solaris 75# include "jvm_solaris.h" 76#endif 77#ifdef TARGET_OS_FAMILY_windows 78# include "jvm_windows.h" 79#endif 80#ifdef TARGET_OS_FAMILY_aix 81# include "jvm_aix.h" 82#endif 83#ifdef TARGET_OS_FAMILY_bsd 84# include "jvm_bsd.h" 85#endif 86 87#include <errno.h> 88 89/* 90 NOTE about use of any ctor or function call that can trigger a safepoint/GC: 91 such ctors and calls MUST NOT come between an oop declaration/init and its 92 usage because if objects are move this may cause various memory stomps, bus 93 errors and segfaults. Here is a cookbook for causing so called "naked oop 94 failures": 95 96 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> { 97 JVMWrapper("JVM_GetClassDeclaredFields"); 98 99 // Object address to be held directly in mirror & not visible to GC 100 oop mirror = JNIHandles::resolve_non_null(ofClass); 101 102 // If this ctor can hit a safepoint, moving objects around, then 103 ComplexConstructor foo; 104 105 // Boom! mirror may point to JUNK instead of the intended object 106 (some dereference of mirror) 107 108 // Here's another call that may block for GC, making mirror stale 109 MutexLocker ml(some_lock); 110 111 // And here's an initializer that can result in a stale oop 112 // all in one step. 113 oop o = call_that_can_throw_exception(TRAPS); 114 115 116 The solution is to keep the oop declaration BELOW the ctor or function 117 call that might cause a GC, do another resolve to reassign the oop, or 118 consider use of a Handle instead of an oop so there is immunity from object 119 motion. But note that the "QUICK" entries below do not have a handlemark 120 and thus can only support use of handles passed in. 121*/ 122 123static void trace_class_resolution_impl(Klass* to_class, TRAPS) { 124 ResourceMark rm; 125 int line_number = -1; 126 const char * source_file = NULL; 127 const char * trace = "explicit"; 128 InstanceKlass* caller = NULL; 129 JavaThread* jthread = JavaThread::current(); 130 if (jthread->has_last_Java_frame()) { 131 vframeStream vfst(jthread); 132 133 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames 134 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK); 135 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK); 136 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK); 137 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK); 138 139 Method* last_caller = NULL; 140 141 while (!vfst.at_end()) { 142 Method* m = vfst.method(); 143 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&& 144 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) && 145 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) { 146 break; 147 } 148 last_caller = m; 149 vfst.next(); 150 } 151 // if this is called from Class.forName0 and that is called from Class.forName, 152 // then print the caller of Class.forName. If this is Class.loadClass, then print 153 // that caller, otherwise keep quiet since this should be picked up elsewhere. 154 bool found_it = false; 155 if (!vfst.at_end() && 156 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() && 157 vfst.method()->name() == vmSymbols::forName0_name()) { 158 vfst.next(); 159 if (!vfst.at_end() && 160 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() && 161 vfst.method()->name() == vmSymbols::forName_name()) { 162 vfst.next(); 163 found_it = true; 164 } 165 } else if (last_caller != NULL && 166 last_caller->method_holder()->name() == 167 vmSymbols::java_lang_ClassLoader() && 168 (last_caller->name() == vmSymbols::loadClassInternal_name() || 169 last_caller->name() == vmSymbols::loadClass_name())) { 170 found_it = true; 171 } else if (!vfst.at_end()) { 172 if (vfst.method()->is_native()) { 173 // JNI call 174 found_it = true; 175 } 176 } 177 if (found_it && !vfst.at_end()) { 178 // found the caller 179 caller = vfst.method()->method_holder(); 180 line_number = vfst.method()->line_number_from_bci(vfst.bci()); 181 if (line_number == -1) { 182 // show method name if it's a native method 183 trace = vfst.method()->name_and_sig_as_C_string(); 184 } 185 Symbol* s = caller->source_file_name(); 186 if (s != NULL) { 187 source_file = s->as_C_string(); 188 } 189 } 190 } 191 if (caller != NULL) { 192 if (to_class != caller) { 193 const char * from = caller->external_name(); 194 const char * to = to_class->external_name(); 195 // print in a single call to reduce interleaving between threads 196 if (source_file != NULL) { 197 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace); 198 } else { 199 tty->print("RESOLVE %s %s (%s)\n", from, to, trace); 200 } 201 } 202 } 203} 204 205void trace_class_resolution(Klass* to_class) { 206 EXCEPTION_MARK; 207 trace_class_resolution_impl(to_class, THREAD); 208 if (HAS_PENDING_EXCEPTION) { 209 CLEAR_PENDING_EXCEPTION; 210 } 211} 212 213// Wrapper to trace JVM functions 214 215#ifdef ASSERT 216 class JVMTraceWrapper : public StackObj { 217 public: 218 JVMTraceWrapper(const char* format, ...) { 219 if (TraceJVMCalls) { 220 va_list ap; 221 va_start(ap, format); 222 tty->print("JVM "); 223 tty->vprint_cr(format, ap); 224 va_end(ap); 225 } 226 } 227 }; 228 229 Histogram* JVMHistogram; 230 volatile jint JVMHistogram_lock = 0; 231 232 class JVMHistogramElement : public HistogramElement { 233 public: 234 JVMHistogramElement(const char* name); 235 }; 236 237 JVMHistogramElement::JVMHistogramElement(const char* elementName) { 238 _name = elementName; 239 uintx count = 0; 240 241 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) { 242 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) { 243 count +=1; 244 if ( (WarnOnStalledSpinLock > 0) 245 && (count % WarnOnStalledSpinLock == 0)) { 246 warning("JVMHistogram_lock seems to be stalled"); 247 } 248 } 249 } 250 251 if(JVMHistogram == NULL) 252 JVMHistogram = new Histogram("JVM Call Counts",100); 253 254 JVMHistogram->add_element(this); 255 Atomic::dec(&JVMHistogram_lock); 256 } 257 258 #define JVMCountWrapper(arg) \ 259 static JVMHistogramElement* e = new JVMHistogramElement(arg); \ 260 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen! 261 262 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1) 263 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2) 264 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3) 265 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4) 266#else 267 #define JVMWrapper(arg1) 268 #define JVMWrapper2(arg1, arg2) 269 #define JVMWrapper3(arg1, arg2, arg3) 270 #define JVMWrapper4(arg1, arg2, arg3, arg4) 271#endif 272 273 274// Interface version ///////////////////////////////////////////////////////////////////// 275 276 277JVM_LEAF(jint, JVM_GetInterfaceVersion()) 278 return JVM_INTERFACE_VERSION; 279JVM_END 280 281 282// java.lang.System ////////////////////////////////////////////////////////////////////// 283 284 285JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored)) 286 JVMWrapper("JVM_CurrentTimeMillis"); 287 return os::javaTimeMillis(); 288JVM_END 289 290JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored)) 291 JVMWrapper("JVM_NanoTime"); 292 return os::javaTimeNanos(); 293JVM_END 294 295 296JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos, 297 jobject dst, jint dst_pos, jint length)) 298 JVMWrapper("JVM_ArrayCopy"); 299 // Check if we have null pointers 300 if (src == NULL || dst == NULL) { 301 THROW(vmSymbols::java_lang_NullPointerException()); 302 } 303 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src)); 304 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst)); 305 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop"); 306 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop"); 307 // Do copy 308 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread); 309JVM_END 310 311 312static void set_property(Handle props, const char* key, const char* value, TRAPS) { 313 JavaValue r(T_OBJECT); 314 // public synchronized Object put(Object key, Object value); 315 HandleMark hm(THREAD); 316 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK); 317 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK); 318 JavaCalls::call_virtual(&r, 319 props, 320 KlassHandle(THREAD, SystemDictionary::Properties_klass()), 321 vmSymbols::put_name(), 322 vmSymbols::object_object_object_signature(), 323 key_str, 324 value_str, 325 THREAD); 326} 327 328 329#define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties)); 330 331 332JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties)) 333 JVMWrapper("JVM_InitProperties"); 334 ResourceMark rm; 335 336 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); 337 338 // System property list includes both user set via -D option and 339 // jvm system specific properties. 340 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { 341 PUTPROP(props, p->key(), p->value()); 342 } 343 344 // Convert the -XX:MaxDirectMemorySize= command line flag 345 // to the sun.nio.MaxDirectMemorySize property. 346 // Do this after setting user properties to prevent people 347 // from setting the value with a -D option, as requested. 348 { 349 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) { 350 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1"); 351 } else { 352 char as_chars[256]; 353 jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize); 354 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars); 355 } 356 } 357 358 // JVM monitoring and management support 359 // Add the sun.management.compiler property for the compiler's name 360 { 361#undef CSIZE 362#if defined(_LP64) || defined(_WIN64) 363 #define CSIZE "64-Bit " 364#else 365 #define CSIZE 366#endif // 64bit 367 368#ifdef TIERED 369 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers"; 370#else 371#if defined(COMPILER1) 372 const char* compiler_name = "HotSpot " CSIZE "Client Compiler"; 373#elif defined(COMPILER2) 374 const char* compiler_name = "HotSpot " CSIZE "Server Compiler"; 375#else 376 const char* compiler_name = ""; 377#endif // compilers 378#endif // TIERED 379 380 if (*compiler_name != '\0' && 381 (Arguments::mode() != Arguments::_int)) { 382 PUTPROP(props, "sun.management.compiler", compiler_name); 383 } 384 } 385 386 return properties; 387JVM_END 388 389 390/* 391 * Return the temporary directory that the VM uses for the attach 392 * and perf data files. 393 * 394 * It is important that this directory is well-known and the 395 * same for all VM instances. It cannot be affected by configuration 396 * variables such as java.io.tmpdir. 397 */ 398JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env)) 399 JVMWrapper("JVM_GetTemporaryDirectory"); 400 HandleMark hm(THREAD); 401 const char* temp_dir = os::get_temp_directory(); 402 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL); 403 return (jstring) JNIHandles::make_local(env, h()); 404JVM_END 405 406 407// java.lang.Runtime ///////////////////////////////////////////////////////////////////////// 408 409extern volatile jint vm_created; 410 411JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code)) 412 if (vm_created != 0 && (code == 0)) { 413 // The VM is about to exit. We call back into Java to check whether finalizers should be run 414 Universe::run_finalizers_on_exit(); 415 } 416 before_exit(thread); 417 vm_exit(code); 418JVM_END 419 420 421JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code)) 422 before_exit(thread); 423 vm_exit(code); 424JVM_END 425 426 427JVM_LEAF(void, JVM_OnExit(void (*func)(void))) 428 register_on_exit_function(func); 429JVM_END 430 431 432JVM_ENTRY_NO_ENV(void, JVM_GC(void)) 433 JVMWrapper("JVM_GC"); 434 if (!DisableExplicitGC) { 435 Universe::heap()->collect(GCCause::_java_lang_system_gc); 436 } 437JVM_END 438 439 440JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void)) 441 JVMWrapper("JVM_MaxObjectInspectionAge"); 442 return Universe::heap()->millis_since_last_gc(); 443JVM_END 444 445 446JVM_LEAF(void, JVM_TraceInstructions(jboolean on)) 447 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported"); 448JVM_END 449 450 451JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on)) 452 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported"); 453JVM_END 454 455static inline jlong convert_size_t_to_jlong(size_t val) { 456 // In the 64-bit vm, a size_t can overflow a jlong (which is signed). 457 NOT_LP64 (return (jlong)val;) 458 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);) 459} 460 461JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void)) 462 JVMWrapper("JVM_TotalMemory"); 463 size_t n = Universe::heap()->capacity(); 464 return convert_size_t_to_jlong(n); 465JVM_END 466 467 468JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void)) 469 JVMWrapper("JVM_FreeMemory"); 470 CollectedHeap* ch = Universe::heap(); 471 size_t n; 472 { 473 MutexLocker x(Heap_lock); 474 n = ch->capacity() - ch->used(); 475 } 476 return convert_size_t_to_jlong(n); 477JVM_END 478 479 480JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void)) 481 JVMWrapper("JVM_MaxMemory"); 482 size_t n = Universe::heap()->max_capacity(); 483 return convert_size_t_to_jlong(n); 484JVM_END 485 486 487JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void)) 488 JVMWrapper("JVM_ActiveProcessorCount"); 489 return os::active_processor_count(); 490JVM_END 491 492 493 494// java.lang.Throwable ////////////////////////////////////////////////////// 495 496 497JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver)) 498 JVMWrapper("JVM_FillInStackTrace"); 499 Handle exception(thread, JNIHandles::resolve_non_null(receiver)); 500 java_lang_Throwable::fill_in_stack_trace(exception); 501JVM_END 502 503 504JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable)) 505 JVMWrapper("JVM_GetStackTraceDepth"); 506 oop exception = JNIHandles::resolve(throwable); 507 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD); 508JVM_END 509 510 511JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index)) 512 JVMWrapper("JVM_GetStackTraceElement"); 513 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC 514 oop exception = JNIHandles::resolve(throwable); 515 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL); 516 return JNIHandles::make_local(env, element); 517JVM_END 518 519 520// java.lang.Object /////////////////////////////////////////////// 521 522 523JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle)) 524 JVMWrapper("JVM_IHashCode"); 525 // as implemented in the classic virtual machine; return 0 if object is NULL 526 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ; 527JVM_END 528 529 530JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms)) 531 JVMWrapper("JVM_MonitorWait"); 532 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 533 JavaThreadInObjectWaitState jtiows(thread, ms != 0); 534 if (JvmtiExport::should_post_monitor_wait()) { 535 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms); 536 537 // The current thread already owns the monitor and it has not yet 538 // been added to the wait queue so the current thread cannot be 539 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT 540 // event handler cannot accidentally consume an unpark() meant for 541 // the ParkEvent associated with this ObjectMonitor. 542 } 543 ObjectSynchronizer::wait(obj, ms, CHECK); 544JVM_END 545 546 547JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle)) 548 JVMWrapper("JVM_MonitorNotify"); 549 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 550 ObjectSynchronizer::notify(obj, CHECK); 551JVM_END 552 553 554JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle)) 555 JVMWrapper("JVM_MonitorNotifyAll"); 556 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 557 ObjectSynchronizer::notifyall(obj, CHECK); 558JVM_END 559 560 561JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle)) 562 JVMWrapper("JVM_Clone"); 563 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 564 const KlassHandle klass (THREAD, obj->klass()); 565 JvmtiVMObjectAllocEventCollector oam; 566 567#ifdef ASSERT 568 // Just checking that the cloneable flag is set correct 569 if (obj->is_array()) { 570 guarantee(klass->is_cloneable(), "all arrays are cloneable"); 571 } else { 572 guarantee(obj->is_instance(), "should be instanceOop"); 573 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass()); 574 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag"); 575 } 576#endif 577 578 // Check if class of obj supports the Cloneable interface. 579 // All arrays are considered to be cloneable (See JLS 20.1.5) 580 if (!klass->is_cloneable()) { 581 ResourceMark rm(THREAD); 582 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name()); 583 } 584 585 // Make shallow object copy 586 const int size = obj->size(); 587 oop new_obj = NULL; 588 if (obj->is_array()) { 589 const int length = ((arrayOop)obj())->length(); 590 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL); 591 } else { 592 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL); 593 } 594 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread 595 // is modifying a reference field in the clonee, a non-oop-atomic copy might 596 // be suspended in the middle of copying the pointer and end up with parts 597 // of two different pointers in the field. Subsequent dereferences will crash. 598 // 4846409: an oop-copy of objects with long or double fields or arrays of same 599 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead 600 // of oops. We know objects are aligned on a minimum of an jlong boundary. 601 // The same is true of StubRoutines::object_copy and the various oop_copy 602 // variants, and of the code generated by the inline_native_clone intrinsic. 603 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned"); 604 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj, 605 (size_t)align_object_size(size) / HeapWordsPerLong); 606 // Clear the header 607 new_obj->init_mark(); 608 609 // Store check (mark entire object and let gc sort it out) 610 BarrierSet* bs = Universe::heap()->barrier_set(); 611 assert(bs->has_write_region_opt(), "Barrier set does not have write_region"); 612 bs->write_region(MemRegion((HeapWord*)new_obj, size)); 613 614 // Caution: this involves a java upcall, so the clone should be 615 // "gc-robust" by this stage. 616 if (klass->has_finalizer()) { 617 assert(obj->is_instance(), "should be instanceOop"); 618 new_obj = InstanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL); 619 } 620 621 return JNIHandles::make_local(env, oop(new_obj)); 622JVM_END 623 624// java.lang.Compiler //////////////////////////////////////////////////// 625 626// The initial cuts of the HotSpot VM will not support JITs, and all existing 627// JITs would need extensive changes to work with HotSpot. The JIT-related JVM 628// functions are all silently ignored unless JVM warnings are printed. 629 630JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls)) 631 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported"); 632JVM_END 633 634 635JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls)) 636 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported"); 637 return JNI_FALSE; 638JVM_END 639 640 641JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls)) 642 if (PrintJVMWarnings) warning("JVM_CompileClass not supported"); 643 return JNI_FALSE; 644JVM_END 645 646 647JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname)) 648 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported"); 649 return JNI_FALSE; 650JVM_END 651 652 653JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg)) 654 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported"); 655 return NULL; 656JVM_END 657 658 659JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls)) 660 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported"); 661JVM_END 662 663 664JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls)) 665 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported"); 666JVM_END 667 668 669 670// Error message support ////////////////////////////////////////////////////// 671 672JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len)) 673 JVMWrapper("JVM_GetLastErrorString"); 674 return (jint)os::lasterror(buf, len); 675JVM_END 676 677 678// java.io.File /////////////////////////////////////////////////////////////// 679 680JVM_LEAF(char*, JVM_NativePath(char* path)) 681 JVMWrapper2("JVM_NativePath (%s)", path); 682 return os::native_path(path); 683JVM_END 684 685 686// Misc. class handling /////////////////////////////////////////////////////////// 687 688 689JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth)) 690 JVMWrapper("JVM_GetCallerClass"); 691 692 // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation; or 693 // sun.reflect.Reflection.getCallerClass with a depth parameter is provided 694 // temporarily for existing code to use until a replacement API is defined. 695 if (SystemDictionary::reflect_CallerSensitive_klass() == NULL || depth != JVM_CALLER_DEPTH) { 696 Klass* k = thread->security_get_caller_class(depth); 697 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror()); 698 } 699 700 // Getting the class of the caller frame. 701 // 702 // The call stack at this point looks something like this: 703 // 704 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ] 705 // [1] [ @CallerSensitive API.method ] 706 // [.] [ (skipped intermediate frames) ] 707 // [n] [ caller ] 708 vframeStream vfst(thread); 709 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass 710 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) { 711 Method* m = vfst.method(); 712 assert(m != NULL, "sanity"); 713 switch (n) { 714 case 0: 715 // This must only be called from Reflection.getCallerClass 716 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) { 717 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass"); 718 } 719 // fall-through 720 case 1: 721 // Frame 0 and 1 must be caller sensitive. 722 if (!m->caller_sensitive()) { 723 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n)); 724 } 725 break; 726 default: 727 if (!m->is_ignored_by_security_stack_walk()) { 728 // We have reached the desired frame; return the holder class. 729 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror()); 730 } 731 break; 732 } 733 } 734 return NULL; 735JVM_END 736 737 738JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf)) 739 JVMWrapper("JVM_FindPrimitiveClass"); 740 oop mirror = NULL; 741 BasicType t = name2type(utf); 742 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) { 743 mirror = Universe::java_mirror(t); 744 } 745 if (mirror == NULL) { 746 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf); 747 } else { 748 return (jclass) JNIHandles::make_local(env, mirror); 749 } 750JVM_END 751 752 753JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls)) 754 JVMWrapper("JVM_ResolveClass"); 755 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented"); 756JVM_END 757 758 759// Returns a class loaded by the bootstrap class loader; or null 760// if not found. ClassNotFoundException is not thrown. 761// 762// Rationale behind JVM_FindClassFromBootLoader 763// a> JVM_FindClassFromClassLoader was never exported in the export tables. 764// b> because of (a) java.dll has a direct dependecy on the unexported 765// private symbol "_JVM_FindClassFromClassLoader@20". 766// c> the launcher cannot use the private symbol as it dynamically opens 767// the entry point, so if something changes, the launcher will fail 768// unexpectedly at runtime, it is safest for the launcher to dlopen a 769// stable exported interface. 770// d> re-exporting JVM_FindClassFromClassLoader as public, will cause its 771// signature to change from _JVM_FindClassFromClassLoader@20 to 772// JVM_FindClassFromClassLoader and will not be backward compatible 773// with older JDKs. 774// Thus a public/stable exported entry point is the right solution, 775// public here means public in linker semantics, and is exported only 776// to the JDK, and is not intended to be a public API. 777 778JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env, 779 const char* name)) 780 JVMWrapper2("JVM_FindClassFromBootLoader %s", name); 781 782 // Java libraries should ensure that name is never null... 783 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 784 // It's impossible to create this class; the name cannot fit 785 // into the constant pool. 786 return NULL; 787 } 788 789 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); 790 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL); 791 if (k == NULL) { 792 return NULL; 793 } 794 795 if (TraceClassResolution) { 796 trace_class_resolution(k); 797 } 798 return (jclass) JNIHandles::make_local(env, k->java_mirror()); 799JVM_END 800 801JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name, 802 jboolean init, jobject loader, 803 jboolean throwError)) 804 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name, 805 throwError ? "error" : "exception"); 806 // Java libraries should ensure that name is never null... 807 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 808 // It's impossible to create this class; the name cannot fit 809 // into the constant pool. 810 if (throwError) { 811 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 812 } else { 813 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name); 814 } 815 } 816 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); 817 Handle h_loader(THREAD, JNIHandles::resolve(loader)); 818 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, 819 Handle(), throwError, THREAD); 820 821 if (TraceClassResolution && result != NULL) { 822 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 823 } 824 return result; 825JVM_END 826 827 828JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name, 829 jboolean init, jclass from)) 830 JVMWrapper2("JVM_FindClassFromClass %s", name); 831 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 832 // It's impossible to create this class; the name cannot fit 833 // into the constant pool. 834 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 835 } 836 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); 837 oop from_class_oop = JNIHandles::resolve(from); 838 Klass* from_class = (from_class_oop == NULL) 839 ? (Klass*)NULL 840 : java_lang_Class::as_Klass(from_class_oop); 841 oop class_loader = NULL; 842 oop protection_domain = NULL; 843 if (from_class != NULL) { 844 class_loader = from_class->class_loader(); 845 protection_domain = from_class->protection_domain(); 846 } 847 Handle h_loader(THREAD, class_loader); 848 Handle h_prot (THREAD, protection_domain); 849 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, 850 h_prot, true, thread); 851 852 if (TraceClassResolution && result != NULL) { 853 // this function is generally only used for class loading during verification. 854 ResourceMark rm; 855 oop from_mirror = JNIHandles::resolve_non_null(from); 856 Klass* from_class = java_lang_Class::as_Klass(from_mirror); 857 const char * from_name = from_class->external_name(); 858 859 oop mirror = JNIHandles::resolve_non_null(result); 860 Klass* to_class = java_lang_Class::as_Klass(mirror); 861 const char * to = to_class->external_name(); 862 tty->print("RESOLVE %s %s (verification)\n", from_name, to); 863 } 864 865 return result; 866JVM_END 867 868static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) { 869 if (loader.is_null()) { 870 return; 871 } 872 873 // check whether the current caller thread holds the lock or not. 874 // If not, increment the corresponding counter 875 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) != 876 ObjectSynchronizer::owner_self) { 877 counter->inc(); 878 } 879} 880 881// common code for JVM_DefineClass() and JVM_DefineClassWithSource() 882// and JVM_DefineClassWithSourceCond() 883static jclass jvm_define_class_common(JNIEnv *env, const char *name, 884 jobject loader, const jbyte *buf, 885 jsize len, jobject pd, const char *source, 886 jboolean verify, TRAPS) { 887 if (source == NULL) source = "__JVM_DefineClass__"; 888 889 assert(THREAD->is_Java_thread(), "must be a JavaThread"); 890 JavaThread* jt = (JavaThread*) THREAD; 891 892 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(), 893 ClassLoader::perf_define_appclass_selftime(), 894 ClassLoader::perf_define_appclasses(), 895 jt->get_thread_stat()->perf_recursion_counts_addr(), 896 jt->get_thread_stat()->perf_timers_addr(), 897 PerfClassTraceTime::DEFINE_CLASS); 898 899 if (UsePerfData) { 900 ClassLoader::perf_app_classfile_bytes_read()->inc(len); 901 } 902 903 // Since exceptions can be thrown, class initialization can take place 904 // if name is NULL no check for class name in .class stream has to be made. 905 TempNewSymbol class_name = NULL; 906 if (name != NULL) { 907 const int str_len = (int)strlen(name); 908 if (str_len > Symbol::max_length()) { 909 // It's impossible to create this class; the name cannot fit 910 // into the constant pool. 911 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 912 } 913 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL); 914 } 915 916 ResourceMark rm(THREAD); 917 ClassFileStream st((u1*) buf, len, (char *)source); 918 Handle class_loader (THREAD, JNIHandles::resolve(loader)); 919 if (UsePerfData) { 920 is_lock_held_by_thread(class_loader, 921 ClassLoader::sync_JVMDefineClassLockFreeCounter(), 922 THREAD); 923 } 924 Handle protection_domain (THREAD, JNIHandles::resolve(pd)); 925 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader, 926 protection_domain, &st, 927 verify != 0, 928 CHECK_NULL); 929 930 if (TraceClassResolution && k != NULL) { 931 trace_class_resolution(k); 932 } 933 934 return (jclass) JNIHandles::make_local(env, k->java_mirror()); 935} 936 937 938JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd)) 939 JVMWrapper2("JVM_DefineClass %s", name); 940 941 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD); 942JVM_END 943 944 945JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source)) 946 JVMWrapper2("JVM_DefineClassWithSource %s", name); 947 948 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD); 949JVM_END 950 951JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name, 952 jobject loader, const jbyte *buf, 953 jsize len, jobject pd, 954 const char *source, jboolean verify)) 955 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name); 956 957 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD); 958JVM_END 959 960JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name)) 961 JVMWrapper("JVM_FindLoadedClass"); 962 ResourceMark rm(THREAD); 963 964 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); 965 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL); 966 967 const char* str = java_lang_String::as_utf8_string(string()); 968 // Sanity check, don't expect null 969 if (str == NULL) return NULL; 970 971 const int str_len = (int)strlen(str); 972 if (str_len > Symbol::max_length()) { 973 // It's impossible to create this class; the name cannot fit 974 // into the constant pool. 975 return NULL; 976 } 977 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL); 978 979 // Security Note: 980 // The Java level wrapper will perform the necessary security check allowing 981 // us to pass the NULL as the initiating class loader. 982 Handle h_loader(THREAD, JNIHandles::resolve(loader)); 983 if (UsePerfData) { 984 is_lock_held_by_thread(h_loader, 985 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(), 986 THREAD); 987 } 988 989 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name, 990 h_loader, 991 Handle(), 992 CHECK_NULL); 993 994 return (k == NULL) ? NULL : 995 (jclass) JNIHandles::make_local(env, k->java_mirror()); 996JVM_END 997 998 999// Reflection support ////////////////////////////////////////////////////////////////////////////// 1000 1001JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls)) 1002 assert (cls != NULL, "illegal class"); 1003 JVMWrapper("JVM_GetClassName"); 1004 JvmtiVMObjectAllocEventCollector oam; 1005 ResourceMark rm(THREAD); 1006 const char* name; 1007 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1008 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls))); 1009 } else { 1010 // Consider caching interned string in Klass 1011 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1012 assert(k->is_klass(), "just checking"); 1013 name = k->external_name(); 1014 } 1015 oop result = StringTable::intern((char*) name, CHECK_NULL); 1016 return (jstring) JNIHandles::make_local(env, result); 1017JVM_END 1018 1019 1020JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls)) 1021 JVMWrapper("JVM_GetClassInterfaces"); 1022 JvmtiVMObjectAllocEventCollector oam; 1023 oop mirror = JNIHandles::resolve_non_null(cls); 1024 1025 // Special handling for primitive objects 1026 if (java_lang_Class::is_primitive(mirror)) { 1027 // Primitive objects does not have any interfaces 1028 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1029 return (jobjectArray) JNIHandles::make_local(env, r); 1030 } 1031 1032 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror)); 1033 // Figure size of result array 1034 int size; 1035 if (klass->oop_is_instance()) { 1036 size = InstanceKlass::cast(klass())->local_interfaces()->length(); 1037 } else { 1038 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass"); 1039 size = 2; 1040 } 1041 1042 // Allocate result array 1043 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL); 1044 objArrayHandle result (THREAD, r); 1045 // Fill in result 1046 if (klass->oop_is_instance()) { 1047 // Regular instance klass, fill in all local interfaces 1048 for (int index = 0; index < size; index++) { 1049 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index); 1050 result->obj_at_put(index, k->java_mirror()); 1051 } 1052 } else { 1053 // All arrays implement java.lang.Cloneable and java.io.Serializable 1054 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror()); 1055 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror()); 1056 } 1057 return (jobjectArray) JNIHandles::make_local(env, result()); 1058JVM_END 1059 1060 1061JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls)) 1062 JVMWrapper("JVM_GetClassLoader"); 1063 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1064 return NULL; 1065 } 1066 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1067 oop loader = k->class_loader(); 1068 return JNIHandles::make_local(env, loader); 1069JVM_END 1070 1071 1072JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls)) 1073 JVMWrapper("JVM_IsInterface"); 1074 oop mirror = JNIHandles::resolve_non_null(cls); 1075 if (java_lang_Class::is_primitive(mirror)) { 1076 return JNI_FALSE; 1077 } 1078 Klass* k = java_lang_Class::as_Klass(mirror); 1079 jboolean result = k->is_interface(); 1080 assert(!result || k->oop_is_instance(), 1081 "all interfaces are instance types"); 1082 // The compiler intrinsic for isInterface tests the 1083 // Klass::_access_flags bits in the same way. 1084 return result; 1085JVM_END 1086 1087 1088JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls)) 1089 JVMWrapper("JVM_GetClassSigners"); 1090 JvmtiVMObjectAllocEventCollector oam; 1091 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1092 // There are no signers for primitive types 1093 return NULL; 1094 } 1095 1096 objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls)); 1097 1098 // If there are no signers set in the class, or if the class 1099 // is an array, return NULL. 1100 if (signers == NULL) return NULL; 1101 1102 // copy of the signers array 1103 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass(); 1104 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL); 1105 for (int index = 0; index < signers->length(); index++) { 1106 signers_copy->obj_at_put(index, signers->obj_at(index)); 1107 } 1108 1109 // return the copy 1110 return (jobjectArray) JNIHandles::make_local(env, signers_copy); 1111JVM_END 1112 1113 1114JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers)) 1115 JVMWrapper("JVM_SetClassSigners"); 1116 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1117 // This call is ignored for primitive types and arrays. 1118 // Signers are only set once, ClassLoader.java, and thus shouldn't 1119 // be called with an array. Only the bootstrap loader creates arrays. 1120 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1121 if (k->oop_is_instance()) { 1122 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers))); 1123 } 1124 } 1125JVM_END 1126 1127 1128JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls)) 1129 JVMWrapper("JVM_GetProtectionDomain"); 1130 if (JNIHandles::resolve(cls) == NULL) { 1131 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); 1132 } 1133 1134 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1135 // Primitive types does not have a protection domain. 1136 return NULL; 1137 } 1138 1139 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls)); 1140 return (jobject) JNIHandles::make_local(env, pd); 1141JVM_END 1142 1143 1144static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) { 1145 // If there is a security manager and protection domain, check the access 1146 // in the protection domain, otherwise it is authorized. 1147 if (java_lang_System::has_security_manager()) { 1148 1149 // For bootstrapping, if pd implies method isn't in the JDK, allow 1150 // this context to revert to older behavior. 1151 // In this case the isAuthorized field in AccessControlContext is also not 1152 // present. 1153 if (Universe::protection_domain_implies_method() == NULL) { 1154 return true; 1155 } 1156 1157 // Whitelist certain access control contexts 1158 if (java_security_AccessControlContext::is_authorized(context)) { 1159 return true; 1160 } 1161 1162 oop prot = klass->protection_domain(); 1163 if (prot != NULL) { 1164 // Call pd.implies(new SecurityPermission("createAccessControlContext")) 1165 // in the new wrapper. 1166 methodHandle m(THREAD, Universe::protection_domain_implies_method()); 1167 Handle h_prot(THREAD, prot); 1168 JavaValue result(T_BOOLEAN); 1169 JavaCallArguments args(h_prot); 1170 JavaCalls::call(&result, m, &args, CHECK_false); 1171 return (result.get_jboolean() != 0); 1172 } 1173 } 1174 return true; 1175} 1176 1177// Create an AccessControlContext with a protection domain with null codesource 1178// and null permissions - which gives no permissions. 1179oop create_dummy_access_control_context(TRAPS) { 1180 InstanceKlass* pd_klass = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass()); 1181 Handle obj = pd_klass->allocate_instance_handle(CHECK_NULL); 1182 // Call constructor ProtectionDomain(null, null); 1183 JavaValue result(T_VOID); 1184 JavaCalls::call_special(&result, obj, KlassHandle(THREAD, pd_klass), 1185 vmSymbols::object_initializer_name(), 1186 vmSymbols::codesource_permissioncollection_signature(), 1187 Handle(), Handle(), CHECK_NULL); 1188 1189 // new ProtectionDomain[] {pd}; 1190 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL); 1191 context->obj_at_put(0, obj()); 1192 1193 // new AccessControlContext(new ProtectionDomain[] {pd}) 1194 objArrayHandle h_context(THREAD, context); 1195 oop acc = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL); 1196 return acc; 1197} 1198 1199JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException)) 1200 JVMWrapper("JVM_DoPrivileged"); 1201 1202 if (action == NULL) { 1203 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action"); 1204 } 1205 1206 // Compute the frame initiating the do privileged operation and setup the privileged stack 1207 vframeStream vfst(thread); 1208 vfst.security_get_caller_frame(1); 1209 1210 if (vfst.at_end()) { 1211 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?"); 1212 } 1213 1214 Method* method = vfst.method(); 1215 instanceKlassHandle klass (THREAD, method->method_holder()); 1216 1217 // Check that action object understands "Object run()" 1218 Handle h_context; 1219 if (context != NULL) { 1220 h_context = Handle(THREAD, JNIHandles::resolve(context)); 1221 bool authorized = is_authorized(h_context, klass, CHECK_NULL); 1222 if (!authorized) { 1223 // Create an unprivileged access control object and call it's run function 1224 // instead. 1225 oop noprivs = create_dummy_access_control_context(CHECK_NULL); 1226 h_context = Handle(THREAD, noprivs); 1227 } 1228 } 1229 1230 // Check that action object understands "Object run()" 1231 Handle object (THREAD, JNIHandles::resolve(action)); 1232 1233 // get run() method 1234 Method* m_oop = object->klass()->uncached_lookup_method( 1235 vmSymbols::run_method_name(), 1236 vmSymbols::void_object_signature(), 1237 Klass::normal); 1238 methodHandle m (THREAD, m_oop); 1239 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) { 1240 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method"); 1241 } 1242 1243 // Stack allocated list of privileged stack elements 1244 PrivilegedElement pi; 1245 if (!vfst.at_end()) { 1246 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL); 1247 thread->set_privileged_stack_top(&pi); 1248 } 1249 1250 1251 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type 1252 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction 1253 Handle pending_exception; 1254 JavaValue result(T_OBJECT); 1255 JavaCallArguments args(object); 1256 JavaCalls::call(&result, m, &args, THREAD); 1257 1258 // done with action, remove ourselves from the list 1259 if (!vfst.at_end()) { 1260 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element"); 1261 thread->set_privileged_stack_top(thread->privileged_stack_top()->next()); 1262 } 1263 1264 if (HAS_PENDING_EXCEPTION) { 1265 pending_exception = Handle(THREAD, PENDING_EXCEPTION); 1266 CLEAR_PENDING_EXCEPTION; 1267 // JVMTI has already reported the pending exception 1268 // JVMTI internal flag reset is needed in order to report PrivilegedActionException 1269 if (THREAD->is_Java_thread()) { 1270 JvmtiExport::clear_detected_exception((JavaThread*) THREAD); 1271 } 1272 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) && 1273 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) { 1274 // Throw a java.security.PrivilegedActionException(Exception e) exception 1275 JavaCallArguments args(pending_exception); 1276 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(), 1277 vmSymbols::exception_void_signature(), 1278 &args); 1279 } 1280 } 1281 1282 if (pending_exception.not_null()) THROW_OOP_0(pending_exception()); 1283 return JNIHandles::make_local(env, (oop) result.get_jobject()); 1284JVM_END 1285 1286 1287// Returns the inherited_access_control_context field of the running thread. 1288JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls)) 1289 JVMWrapper("JVM_GetInheritedAccessControlContext"); 1290 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj()); 1291 return JNIHandles::make_local(env, result); 1292JVM_END 1293 1294class RegisterArrayForGC { 1295 private: 1296 JavaThread *_thread; 1297 public: 1298 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) { 1299 _thread = thread; 1300 _thread->register_array_for_gc(array); 1301 } 1302 1303 ~RegisterArrayForGC() { 1304 _thread->register_array_for_gc(NULL); 1305 } 1306}; 1307 1308 1309JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls)) 1310 JVMWrapper("JVM_GetStackAccessControlContext"); 1311 if (!UsePrivilegedStack) return NULL; 1312 1313 ResourceMark rm(THREAD); 1314 GrowableArray<oop>* local_array = new GrowableArray<oop>(12); 1315 JvmtiVMObjectAllocEventCollector oam; 1316 1317 // count the protection domains on the execution stack. We collapse 1318 // duplicate consecutive protection domains into a single one, as 1319 // well as stopping when we hit a privileged frame. 1320 1321 // Use vframeStream to iterate through Java frames 1322 vframeStream vfst(thread); 1323 1324 oop previous_protection_domain = NULL; 1325 Handle privileged_context(thread, NULL); 1326 bool is_privileged = false; 1327 oop protection_domain = NULL; 1328 1329 for(; !vfst.at_end(); vfst.next()) { 1330 // get method of frame 1331 Method* method = vfst.method(); 1332 intptr_t* frame_id = vfst.frame_id(); 1333 1334 // check the privileged frames to see if we have a match 1335 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) { 1336 // this frame is privileged 1337 is_privileged = true; 1338 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context()); 1339 protection_domain = thread->privileged_stack_top()->protection_domain(); 1340 } else { 1341 protection_domain = method->method_holder()->protection_domain(); 1342 } 1343 1344 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) { 1345 local_array->push(protection_domain); 1346 previous_protection_domain = protection_domain; 1347 } 1348 1349 if (is_privileged) break; 1350 } 1351 1352 1353 // either all the domains on the stack were system domains, or 1354 // we had a privileged system domain 1355 if (local_array->is_empty()) { 1356 if (is_privileged && privileged_context.is_null()) return NULL; 1357 1358 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL); 1359 return JNIHandles::make_local(env, result); 1360 } 1361 1362 // the resource area must be registered in case of a gc 1363 RegisterArrayForGC ragc(thread, local_array); 1364 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(), 1365 local_array->length(), CHECK_NULL); 1366 objArrayHandle h_context(thread, context); 1367 for (int index = 0; index < local_array->length(); index++) { 1368 h_context->obj_at_put(index, local_array->at(index)); 1369 } 1370 1371 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL); 1372 1373 return JNIHandles::make_local(env, result); 1374JVM_END 1375 1376 1377JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls)) 1378 JVMWrapper("JVM_IsArrayClass"); 1379 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1380 return (k != NULL) && k->oop_is_array() ? true : false; 1381JVM_END 1382 1383 1384JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls)) 1385 JVMWrapper("JVM_IsPrimitiveClass"); 1386 oop mirror = JNIHandles::resolve_non_null(cls); 1387 return (jboolean) java_lang_Class::is_primitive(mirror); 1388JVM_END 1389 1390 1391JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls)) 1392 JVMWrapper("JVM_GetComponentType"); 1393 oop mirror = JNIHandles::resolve_non_null(cls); 1394 oop result = Reflection::array_component_type(mirror, CHECK_NULL); 1395 return (jclass) JNIHandles::make_local(env, result); 1396JVM_END 1397 1398 1399JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls)) 1400 JVMWrapper("JVM_GetClassModifiers"); 1401 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1402 // Primitive type 1403 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 1404 } 1405 1406 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1407 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0)); 1408 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK"); 1409 return k->modifier_flags(); 1410JVM_END 1411 1412 1413// Inner class reflection /////////////////////////////////////////////////////////////////////////////// 1414 1415JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass)) 1416 JvmtiVMObjectAllocEventCollector oam; 1417 // ofClass is a reference to a java_lang_Class object. The mirror object 1418 // of an InstanceKlass 1419 1420 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1421 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) { 1422 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1423 return (jobjectArray)JNIHandles::make_local(env, result); 1424 } 1425 1426 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1427 InnerClassesIterator iter(k); 1428 1429 if (iter.length() == 0) { 1430 // Neither an inner nor outer class 1431 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1432 return (jobjectArray)JNIHandles::make_local(env, result); 1433 } 1434 1435 // find inner class info 1436 constantPoolHandle cp(thread, k->constants()); 1437 int length = iter.length(); 1438 1439 // Allocate temp. result array 1440 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL); 1441 objArrayHandle result (THREAD, r); 1442 int members = 0; 1443 1444 for (; !iter.done(); iter.next()) { 1445 int ioff = iter.inner_class_info_index(); 1446 int ooff = iter.outer_class_info_index(); 1447 1448 if (ioff != 0 && ooff != 0) { 1449 // Check to see if the name matches the class we're looking for 1450 // before attempting to find the class. 1451 if (cp->klass_name_at_matches(k, ooff)) { 1452 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL); 1453 if (outer_klass == k()) { 1454 Klass* ik = cp->klass_at(ioff, CHECK_NULL); 1455 instanceKlassHandle inner_klass (THREAD, ik); 1456 1457 // Throws an exception if outer klass has not declared k as 1458 // an inner klass 1459 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL); 1460 1461 result->obj_at_put(members, inner_klass->java_mirror()); 1462 members++; 1463 } 1464 } 1465 } 1466 } 1467 1468 if (members != length) { 1469 // Return array of right length 1470 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL); 1471 for(int i = 0; i < members; i++) { 1472 res->obj_at_put(i, result->obj_at(i)); 1473 } 1474 return (jobjectArray)JNIHandles::make_local(env, res); 1475 } 1476 1477 return (jobjectArray)JNIHandles::make_local(env, result()); 1478JVM_END 1479 1480 1481JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass)) 1482{ 1483 // ofClass is a reference to a java_lang_Class object. 1484 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1485 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) { 1486 return NULL; 1487 } 1488 1489 bool inner_is_member = false; 1490 Klass* outer_klass 1491 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)) 1492 )->compute_enclosing_class(&inner_is_member, CHECK_NULL); 1493 if (outer_klass == NULL) return NULL; // already a top-level class 1494 if (!inner_is_member) return NULL; // an anonymous class (inside a method) 1495 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror()); 1496} 1497JVM_END 1498 1499// should be in InstanceKlass.cpp, but is here for historical reasons 1500Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k, 1501 bool* inner_is_member, 1502 TRAPS) { 1503 Thread* thread = THREAD; 1504 InnerClassesIterator iter(k); 1505 if (iter.length() == 0) { 1506 // No inner class info => no declaring class 1507 return NULL; 1508 } 1509 1510 constantPoolHandle i_cp(thread, k->constants()); 1511 1512 bool found = false; 1513 Klass* ok; 1514 instanceKlassHandle outer_klass; 1515 *inner_is_member = false; 1516 1517 // Find inner_klass attribute 1518 for (; !iter.done() && !found; iter.next()) { 1519 int ioff = iter.inner_class_info_index(); 1520 int ooff = iter.outer_class_info_index(); 1521 int noff = iter.inner_name_index(); 1522 if (ioff != 0) { 1523 // Check to see if the name matches the class we're looking for 1524 // before attempting to find the class. 1525 if (i_cp->klass_name_at_matches(k, ioff)) { 1526 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL); 1527 found = (k() == inner_klass); 1528 if (found && ooff != 0) { 1529 ok = i_cp->klass_at(ooff, CHECK_NULL); 1530 outer_klass = instanceKlassHandle(thread, ok); 1531 *inner_is_member = true; 1532 } 1533 } 1534 } 1535 } 1536 1537 if (found && outer_klass.is_null()) { 1538 // It may be anonymous; try for that. 1539 int encl_method_class_idx = k->enclosing_method_class_index(); 1540 if (encl_method_class_idx != 0) { 1541 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL); 1542 outer_klass = instanceKlassHandle(thread, ok); 1543 *inner_is_member = false; 1544 } 1545 } 1546 1547 // If no inner class attribute found for this class. 1548 if (outer_klass.is_null()) return NULL; 1549 1550 // Throws an exception if outer klass has not declared k as an inner klass 1551 // We need evidence that each klass knows about the other, or else 1552 // the system could allow a spoof of an inner class to gain access rights. 1553 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL); 1554 return outer_klass(); 1555} 1556 1557JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls)) 1558 assert (cls != NULL, "illegal class"); 1559 JVMWrapper("JVM_GetClassSignature"); 1560 JvmtiVMObjectAllocEventCollector oam; 1561 ResourceMark rm(THREAD); 1562 // Return null for arrays and primatives 1563 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1564 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1565 if (k->oop_is_instance()) { 1566 Symbol* sym = InstanceKlass::cast(k)->generic_signature(); 1567 if (sym == NULL) return NULL; 1568 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 1569 return (jstring) JNIHandles::make_local(env, str()); 1570 } 1571 } 1572 return NULL; 1573JVM_END 1574 1575 1576JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls)) 1577 assert (cls != NULL, "illegal class"); 1578 JVMWrapper("JVM_GetClassAnnotations"); 1579 1580 // Return null for arrays and primitives 1581 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1582 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1583 if (k->oop_is_instance()) { 1584 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL); 1585 return (jbyteArray) JNIHandles::make_local(env, a); 1586 } 1587 } 1588 return NULL; 1589JVM_END 1590 1591 1592static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) { 1593 // some of this code was adapted from from jni_FromReflectedField 1594 1595 oop reflected = JNIHandles::resolve_non_null(field); 1596 oop mirror = java_lang_reflect_Field::clazz(reflected); 1597 Klass* k = java_lang_Class::as_Klass(mirror); 1598 int slot = java_lang_reflect_Field::slot(reflected); 1599 int modifiers = java_lang_reflect_Field::modifiers(reflected); 1600 1601 KlassHandle kh(THREAD, k); 1602 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot); 1603 1604 if (modifiers & JVM_ACC_STATIC) { 1605 // for static fields we only look in the current class 1606 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) { 1607 assert(false, "cannot find static field"); 1608 return false; 1609 } 1610 } else { 1611 // for instance fields we start with the current class and work 1612 // our way up through the superclass chain 1613 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) { 1614 assert(false, "cannot find instance field"); 1615 return false; 1616 } 1617 } 1618 return true; 1619} 1620 1621JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field)) 1622 // field is a handle to a java.lang.reflect.Field object 1623 assert(field != NULL, "illegal field"); 1624 JVMWrapper("JVM_GetFieldAnnotations"); 1625 1626 fieldDescriptor fd; 1627 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL); 1628 if (!gotFd) { 1629 return NULL; 1630 } 1631 1632 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD)); 1633JVM_END 1634 1635 1636static Method* jvm_get_method_common(jobject method) { 1637 // some of this code was adapted from from jni_FromReflectedMethod 1638 1639 oop reflected = JNIHandles::resolve_non_null(method); 1640 oop mirror = NULL; 1641 int slot = 0; 1642 1643 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 1644 mirror = java_lang_reflect_Constructor::clazz(reflected); 1645 slot = java_lang_reflect_Constructor::slot(reflected); 1646 } else { 1647 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), 1648 "wrong type"); 1649 mirror = java_lang_reflect_Method::clazz(reflected); 1650 slot = java_lang_reflect_Method::slot(reflected); 1651 } 1652 Klass* k = java_lang_Class::as_Klass(mirror); 1653 1654 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot); 1655 assert(m != NULL, "cannot find method"); 1656 return m; // caller has to deal with NULL in product mode 1657} 1658 1659 1660JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method)) 1661 JVMWrapper("JVM_GetMethodAnnotations"); 1662 1663 // method is a handle to a java.lang.reflect.Method object 1664 Method* m = jvm_get_method_common(method); 1665 if (m == NULL) { 1666 return NULL; 1667 } 1668 1669 return (jbyteArray) JNIHandles::make_local(env, 1670 Annotations::make_java_array(m->annotations(), THREAD)); 1671JVM_END 1672 1673 1674JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method)) 1675 JVMWrapper("JVM_GetMethodDefaultAnnotationValue"); 1676 1677 // method is a handle to a java.lang.reflect.Method object 1678 Method* m = jvm_get_method_common(method); 1679 if (m == NULL) { 1680 return NULL; 1681 } 1682 1683 return (jbyteArray) JNIHandles::make_local(env, 1684 Annotations::make_java_array(m->annotation_default(), THREAD)); 1685JVM_END 1686 1687 1688JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method)) 1689 JVMWrapper("JVM_GetMethodParameterAnnotations"); 1690 1691 // method is a handle to a java.lang.reflect.Method object 1692 Method* m = jvm_get_method_common(method); 1693 if (m == NULL) { 1694 return NULL; 1695 } 1696 1697 return (jbyteArray) JNIHandles::make_local(env, 1698 Annotations::make_java_array(m->parameter_annotations(), THREAD)); 1699JVM_END 1700 1701/* Type use annotations support (JDK 1.8) */ 1702 1703JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls)) 1704 assert (cls != NULL, "illegal class"); 1705 JVMWrapper("JVM_GetClassTypeAnnotations"); 1706 ResourceMark rm(THREAD); 1707 // Return null for arrays and primitives 1708 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1709 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1710 if (k->oop_is_instance()) { 1711 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations(); 1712 if (type_annotations != NULL) { 1713 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL); 1714 return (jbyteArray) JNIHandles::make_local(env, a); 1715 } 1716 } 1717 } 1718 return NULL; 1719JVM_END 1720 1721JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method)) 1722 assert (method != NULL, "illegal method"); 1723 JVMWrapper("JVM_GetMethodTypeAnnotations"); 1724 1725 // method is a handle to a java.lang.reflect.Method object 1726 Method* m = jvm_get_method_common(method); 1727 if (m == NULL) { 1728 return NULL; 1729 } 1730 1731 AnnotationArray* type_annotations = m->type_annotations(); 1732 if (type_annotations != NULL) { 1733 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL); 1734 return (jbyteArray) JNIHandles::make_local(env, a); 1735 } 1736 1737 return NULL; 1738JVM_END 1739 1740JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field)) 1741 assert (field != NULL, "illegal field"); 1742 JVMWrapper("JVM_GetFieldTypeAnnotations"); 1743 1744 fieldDescriptor fd; 1745 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL); 1746 if (!gotFd) { 1747 return NULL; 1748 } 1749 1750 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD)); 1751JVM_END 1752 1753static void bounds_check(constantPoolHandle cp, jint index, TRAPS) { 1754 if (!cp->is_within_bounds(index)) { 1755 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds"); 1756 } 1757} 1758 1759JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method)) 1760{ 1761 JVMWrapper("JVM_GetMethodParameters"); 1762 // method is a handle to a java.lang.reflect.Method object 1763 Method* method_ptr = jvm_get_method_common(method); 1764 methodHandle mh (THREAD, method_ptr); 1765 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method)); 1766 const int num_params = mh->method_parameters_length(); 1767 1768 if (0 != num_params) { 1769 // make sure all the symbols are properly formatted 1770 for (int i = 0; i < num_params; i++) { 1771 MethodParametersElement* params = mh->method_parameters_start(); 1772 int index = params[i].name_cp_index; 1773 bounds_check(mh->constants(), index, CHECK_NULL); 1774 1775 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) { 1776 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), 1777 "Wrong type at constant pool index"); 1778 } 1779 1780 } 1781 1782 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL); 1783 objArrayHandle result (THREAD, result_oop); 1784 1785 for (int i = 0; i < num_params; i++) { 1786 MethodParametersElement* params = mh->method_parameters_start(); 1787 // For a 0 index, give a NULL symbol 1788 Symbol* sym = 0 != params[i].name_cp_index ? 1789 mh->constants()->symbol_at(params[i].name_cp_index) : NULL; 1790 int flags = params[i].flags; 1791 oop param = Reflection::new_parameter(reflected_method, i, sym, 1792 flags, CHECK_NULL); 1793 result->obj_at_put(i, param); 1794 } 1795 return (jobjectArray)JNIHandles::make_local(env, result()); 1796 } else { 1797 return (jobjectArray)NULL; 1798 } 1799} 1800JVM_END 1801 1802// New (JDK 1.4) reflection implementation ///////////////////////////////////// 1803 1804JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1805{ 1806 JVMWrapper("JVM_GetClassDeclaredFields"); 1807 JvmtiVMObjectAllocEventCollector oam; 1808 1809 // Exclude primitive types and array types 1810 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1811 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) { 1812 // Return empty array 1813 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL); 1814 return (jobjectArray) JNIHandles::make_local(env, res); 1815 } 1816 1817 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1818 constantPoolHandle cp(THREAD, k->constants()); 1819 1820 // Ensure class is linked 1821 k->link_class(CHECK_NULL); 1822 1823 // 4496456 We need to filter out java.lang.Throwable.backtrace 1824 bool skip_backtrace = false; 1825 1826 // Allocate result 1827 int num_fields; 1828 1829 if (publicOnly) { 1830 num_fields = 0; 1831 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) { 1832 if (fs.access_flags().is_public()) ++num_fields; 1833 } 1834 } else { 1835 num_fields = k->java_fields_count(); 1836 1837 if (k() == SystemDictionary::Throwable_klass()) { 1838 num_fields--; 1839 skip_backtrace = true; 1840 } 1841 } 1842 1843 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL); 1844 objArrayHandle result (THREAD, r); 1845 1846 int out_idx = 0; 1847 fieldDescriptor fd; 1848 for (JavaFieldStream fs(k); !fs.done(); fs.next()) { 1849 if (skip_backtrace) { 1850 // 4496456 skip java.lang.Throwable.backtrace 1851 int offset = fs.offset(); 1852 if (offset == java_lang_Throwable::get_backtrace_offset()) continue; 1853 } 1854 1855 if (!publicOnly || fs.access_flags().is_public()) { 1856 fd.reinitialize(k(), fs.index()); 1857 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL); 1858 result->obj_at_put(out_idx, field); 1859 ++out_idx; 1860 } 1861 } 1862 assert(out_idx == num_fields, "just checking"); 1863 return (jobjectArray) JNIHandles::make_local(env, result()); 1864} 1865JVM_END 1866 1867static bool select_method(methodHandle method, bool want_constructor) { 1868 if (want_constructor) { 1869 return (method->is_initializer() && !method->is_static()); 1870 } else { 1871 return (!method->is_initializer() && !method->is_overpass()); 1872 } 1873} 1874 1875static jobjectArray get_class_declared_methods_helper( 1876 JNIEnv *env, 1877 jclass ofClass, jboolean publicOnly, 1878 bool want_constructor, 1879 Klass* klass, TRAPS) { 1880 1881 JvmtiVMObjectAllocEventCollector oam; 1882 1883 // Exclude primitive types and array types 1884 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) 1885 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) { 1886 // Return empty array 1887 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL); 1888 return (jobjectArray) JNIHandles::make_local(env, res); 1889 } 1890 1891 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1892 1893 // Ensure class is linked 1894 k->link_class(CHECK_NULL); 1895 1896 Array<Method*>* methods = k->methods(); 1897 int methods_length = methods->length(); 1898 1899 // Save original method_idnum in case of redefinition, which can change 1900 // the idnum of obsolete methods. The new method will have the same idnum 1901 // but if we refresh the methods array, the counts will be wrong. 1902 ResourceMark rm(THREAD); 1903 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length); 1904 int num_methods = 0; 1905 1906 for (int i = 0; i < methods_length; i++) { 1907 methodHandle method(THREAD, methods->at(i)); 1908 if (select_method(method, want_constructor)) { 1909 if (!publicOnly || method->is_public()) { 1910 idnums->push(method->method_idnum()); 1911 ++num_methods; 1912 } 1913 } 1914 } 1915 1916 // Allocate result 1917 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL); 1918 objArrayHandle result (THREAD, r); 1919 1920 // Now just put the methods that we selected above, but go by their idnum 1921 // in case of redefinition. The methods can be redefined at any safepoint, 1922 // so above when allocating the oop array and below when creating reflect 1923 // objects. 1924 for (int i = 0; i < num_methods; i++) { 1925 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i))); 1926 if (method.is_null()) { 1927 // Method may have been deleted and seems this API can handle null 1928 // Otherwise should probably put a method that throws NSME 1929 result->obj_at_put(i, NULL); 1930 } else { 1931 oop m; 1932 if (want_constructor) { 1933 m = Reflection::new_constructor(method, CHECK_NULL); 1934 } else { 1935 m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL); 1936 } 1937 result->obj_at_put(i, m); 1938 } 1939 } 1940 1941 return (jobjectArray) JNIHandles::make_local(env, result()); 1942} 1943 1944JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1945{ 1946 JVMWrapper("JVM_GetClassDeclaredMethods"); 1947 return get_class_declared_methods_helper(env, ofClass, publicOnly, 1948 /*want_constructor*/ false, 1949 SystemDictionary::reflect_Method_klass(), THREAD); 1950} 1951JVM_END 1952 1953JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1954{ 1955 JVMWrapper("JVM_GetClassDeclaredConstructors"); 1956 return get_class_declared_methods_helper(env, ofClass, publicOnly, 1957 /*want_constructor*/ true, 1958 SystemDictionary::reflect_Constructor_klass(), THREAD); 1959} 1960JVM_END 1961 1962JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls)) 1963{ 1964 JVMWrapper("JVM_GetClassAccessFlags"); 1965 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1966 // Primitive type 1967 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 1968 } 1969 1970 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1971 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS; 1972} 1973JVM_END 1974 1975 1976// Constant pool access ////////////////////////////////////////////////////////// 1977 1978JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls)) 1979{ 1980 JVMWrapper("JVM_GetClassConstantPool"); 1981 JvmtiVMObjectAllocEventCollector oam; 1982 1983 // Return null for primitives and arrays 1984 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1985 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1986 if (k->oop_is_instance()) { 1987 instanceKlassHandle k_h(THREAD, k); 1988 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL); 1989 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants()); 1990 return JNIHandles::make_local(jcp()); 1991 } 1992 } 1993 return NULL; 1994} 1995JVM_END 1996 1997 1998JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused)) 1999{ 2000 JVMWrapper("JVM_ConstantPoolGetSize"); 2001 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2002 return cp->length(); 2003} 2004JVM_END 2005 2006 2007JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2008{ 2009 JVMWrapper("JVM_ConstantPoolGetClassAt"); 2010 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2011 bounds_check(cp, index, CHECK_NULL); 2012 constantTag tag = cp->tag_at(index); 2013 if (!tag.is_klass() && !tag.is_unresolved_klass()) { 2014 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2015 } 2016 Klass* k = cp->klass_at(index, CHECK_NULL); 2017 return (jclass) JNIHandles::make_local(k->java_mirror()); 2018} 2019JVM_END 2020 2021JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) 2022{ 2023 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded"); 2024 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2025 bounds_check(cp, index, CHECK_NULL); 2026 constantTag tag = cp->tag_at(index); 2027 if (!tag.is_klass() && !tag.is_unresolved_klass()) { 2028 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2029 } 2030 Klass* k = ConstantPool::klass_at_if_loaded(cp, index); 2031 if (k == NULL) return NULL; 2032 return (jclass) JNIHandles::make_local(k->java_mirror()); 2033} 2034JVM_END 2035 2036static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { 2037 constantTag tag = cp->tag_at(index); 2038 if (!tag.is_method() && !tag.is_interface_method()) { 2039 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2040 } 2041 int klass_ref = cp->uncached_klass_ref_index_at(index); 2042 Klass* k_o; 2043 if (force_resolution) { 2044 k_o = cp->klass_at(klass_ref, CHECK_NULL); 2045 } else { 2046 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref); 2047 if (k_o == NULL) return NULL; 2048 } 2049 instanceKlassHandle k(THREAD, k_o); 2050 Symbol* name = cp->uncached_name_ref_at(index); 2051 Symbol* sig = cp->uncached_signature_ref_at(index); 2052 methodHandle m (THREAD, k->find_method(name, sig)); 2053 if (m.is_null()) { 2054 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class"); 2055 } 2056 oop method; 2057 if (!m->is_initializer() || m->is_static()) { 2058 method = Reflection::new_method(m, true, true, CHECK_NULL); 2059 } else { 2060 method = Reflection::new_constructor(m, CHECK_NULL); 2061 } 2062 return JNIHandles::make_local(method); 2063} 2064 2065JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2066{ 2067 JVMWrapper("JVM_ConstantPoolGetMethodAt"); 2068 JvmtiVMObjectAllocEventCollector oam; 2069 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2070 bounds_check(cp, index, CHECK_NULL); 2071 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL); 2072 return res; 2073} 2074JVM_END 2075 2076JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) 2077{ 2078 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded"); 2079 JvmtiVMObjectAllocEventCollector oam; 2080 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2081 bounds_check(cp, index, CHECK_NULL); 2082 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL); 2083 return res; 2084} 2085JVM_END 2086 2087static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { 2088 constantTag tag = cp->tag_at(index); 2089 if (!tag.is_field()) { 2090 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2091 } 2092 int klass_ref = cp->uncached_klass_ref_index_at(index); 2093 Klass* k_o; 2094 if (force_resolution) { 2095 k_o = cp->klass_at(klass_ref, CHECK_NULL); 2096 } else { 2097 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref); 2098 if (k_o == NULL) return NULL; 2099 } 2100 instanceKlassHandle k(THREAD, k_o); 2101 Symbol* name = cp->uncached_name_ref_at(index); 2102 Symbol* sig = cp->uncached_signature_ref_at(index); 2103 fieldDescriptor fd; 2104 Klass* target_klass = k->find_field(name, sig, &fd); 2105 if (target_klass == NULL) { 2106 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class"); 2107 } 2108 oop field = Reflection::new_field(&fd, true, CHECK_NULL); 2109 return JNIHandles::make_local(field); 2110} 2111 2112JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index)) 2113{ 2114 JVMWrapper("JVM_ConstantPoolGetFieldAt"); 2115 JvmtiVMObjectAllocEventCollector oam; 2116 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2117 bounds_check(cp, index, CHECK_NULL); 2118 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL); 2119 return res; 2120} 2121JVM_END 2122 2123JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) 2124{ 2125 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded"); 2126 JvmtiVMObjectAllocEventCollector oam; 2127 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2128 bounds_check(cp, index, CHECK_NULL); 2129 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL); 2130 return res; 2131} 2132JVM_END 2133 2134JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2135{ 2136 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt"); 2137 JvmtiVMObjectAllocEventCollector oam; 2138 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2139 bounds_check(cp, index, CHECK_NULL); 2140 constantTag tag = cp->tag_at(index); 2141 if (!tag.is_field_or_method()) { 2142 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2143 } 2144 int klass_ref = cp->uncached_klass_ref_index_at(index); 2145 Symbol* klass_name = cp->klass_name_at(klass_ref); 2146 Symbol* member_name = cp->uncached_name_ref_at(index); 2147 Symbol* member_sig = cp->uncached_signature_ref_at(index); 2148 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL); 2149 objArrayHandle dest(THREAD, dest_o); 2150 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL); 2151 dest->obj_at_put(0, str()); 2152 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL); 2153 dest->obj_at_put(1, str()); 2154 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL); 2155 dest->obj_at_put(2, str()); 2156 return (jobjectArray) JNIHandles::make_local(dest()); 2157} 2158JVM_END 2159 2160JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2161{ 2162 JVMWrapper("JVM_ConstantPoolGetIntAt"); 2163 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2164 bounds_check(cp, index, CHECK_0); 2165 constantTag tag = cp->tag_at(index); 2166 if (!tag.is_int()) { 2167 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2168 } 2169 return cp->int_at(index); 2170} 2171JVM_END 2172 2173JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2174{ 2175 JVMWrapper("JVM_ConstantPoolGetLongAt"); 2176 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2177 bounds_check(cp, index, CHECK_(0L)); 2178 constantTag tag = cp->tag_at(index); 2179 if (!tag.is_long()) { 2180 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2181 } 2182 return cp->long_at(index); 2183} 2184JVM_END 2185 2186JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2187{ 2188 JVMWrapper("JVM_ConstantPoolGetFloatAt"); 2189 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2190 bounds_check(cp, index, CHECK_(0.0f)); 2191 constantTag tag = cp->tag_at(index); 2192 if (!tag.is_float()) { 2193 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2194 } 2195 return cp->float_at(index); 2196} 2197JVM_END 2198 2199JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2200{ 2201 JVMWrapper("JVM_ConstantPoolGetDoubleAt"); 2202 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2203 bounds_check(cp, index, CHECK_(0.0)); 2204 constantTag tag = cp->tag_at(index); 2205 if (!tag.is_double()) { 2206 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2207 } 2208 return cp->double_at(index); 2209} 2210JVM_END 2211 2212JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2213{ 2214 JVMWrapper("JVM_ConstantPoolGetStringAt"); 2215 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2216 bounds_check(cp, index, CHECK_NULL); 2217 constantTag tag = cp->tag_at(index); 2218 if (!tag.is_string()) { 2219 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2220 } 2221 oop str = cp->string_at(index, CHECK_NULL); 2222 return (jstring) JNIHandles::make_local(str); 2223} 2224JVM_END 2225 2226JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index)) 2227{ 2228 JVMWrapper("JVM_ConstantPoolGetUTF8At"); 2229 JvmtiVMObjectAllocEventCollector oam; 2230 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2231 bounds_check(cp, index, CHECK_NULL); 2232 constantTag tag = cp->tag_at(index); 2233 if (!tag.is_symbol()) { 2234 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2235 } 2236 Symbol* sym = cp->symbol_at(index); 2237 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 2238 return (jstring) JNIHandles::make_local(str()); 2239} 2240JVM_END 2241 2242 2243// Assertion support. ////////////////////////////////////////////////////////// 2244 2245JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls)) 2246 JVMWrapper("JVM_DesiredAssertionStatus"); 2247 assert(cls != NULL, "bad class"); 2248 2249 oop r = JNIHandles::resolve(cls); 2250 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed"); 2251 if (java_lang_Class::is_primitive(r)) return false; 2252 2253 Klass* k = java_lang_Class::as_Klass(r); 2254 assert(k->oop_is_instance(), "must be an instance klass"); 2255 if (! k->oop_is_instance()) return false; 2256 2257 ResourceMark rm(THREAD); 2258 const char* name = k->name()->as_C_string(); 2259 bool system_class = k->class_loader() == NULL; 2260 return JavaAssertions::enabled(name, system_class); 2261 2262JVM_END 2263 2264 2265// Return a new AssertionStatusDirectives object with the fields filled in with 2266// command-line assertion arguments (i.e., -ea, -da). 2267JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused)) 2268 JVMWrapper("JVM_AssertionStatusDirectives"); 2269 JvmtiVMObjectAllocEventCollector oam; 2270 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL); 2271 return JNIHandles::make_local(env, asd); 2272JVM_END 2273 2274// Verification //////////////////////////////////////////////////////////////////////////////// 2275 2276// Reflection for the verifier ///////////////////////////////////////////////////////////////// 2277 2278// RedefineClasses support: bug 6214132 caused verification to fail. 2279// All functions from this section should call the jvmtiThreadSate function: 2280// Klass* class_to_verify_considering_redefinition(Klass* klass). 2281// The function returns a Klass* of the _scratch_class if the verifier 2282// was invoked in the middle of the class redefinition. 2283// Otherwise it returns its argument value which is the _the_class Klass*. 2284// Please, refer to the description in the jvmtiThreadSate.hpp. 2285 2286JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls)) 2287 JVMWrapper("JVM_GetClassNameUTF"); 2288 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2289 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2290 return k->name()->as_utf8(); 2291JVM_END 2292 2293 2294JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types)) 2295 JVMWrapper("JVM_GetClassCPTypes"); 2296 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2297 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2298 // types will have length zero if this is not an InstanceKlass 2299 // (length is determined by call to JVM_GetClassCPEntriesCount) 2300 if (k->oop_is_instance()) { 2301 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2302 for (int index = cp->length() - 1; index >= 0; index--) { 2303 constantTag tag = cp->tag_at(index); 2304 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value(); 2305 } 2306 } 2307JVM_END 2308 2309 2310JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls)) 2311 JVMWrapper("JVM_GetClassCPEntriesCount"); 2312 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2313 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2314 if (!k->oop_is_instance()) 2315 return 0; 2316 return InstanceKlass::cast(k)->constants()->length(); 2317JVM_END 2318 2319 2320JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls)) 2321 JVMWrapper("JVM_GetClassFieldsCount"); 2322 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2323 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2324 if (!k->oop_is_instance()) 2325 return 0; 2326 return InstanceKlass::cast(k)->java_fields_count(); 2327JVM_END 2328 2329 2330JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls)) 2331 JVMWrapper("JVM_GetClassMethodsCount"); 2332 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2333 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2334 if (!k->oop_is_instance()) 2335 return 0; 2336 return InstanceKlass::cast(k)->methods()->length(); 2337JVM_END 2338 2339 2340// The following methods, used for the verifier, are never called with 2341// array klasses, so a direct cast to InstanceKlass is safe. 2342// Typically, these methods are called in a loop with bounds determined 2343// by the results of JVM_GetClass{Fields,Methods}Count, which return 2344// zero for arrays. 2345JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions)) 2346 JVMWrapper("JVM_GetMethodIxExceptionIndexes"); 2347 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2348 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2349 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2350 int length = method->checked_exceptions_length(); 2351 if (length > 0) { 2352 CheckedExceptionElement* table= method->checked_exceptions_start(); 2353 for (int i = 0; i < length; i++) { 2354 exceptions[i] = table[i].class_cp_index; 2355 } 2356 } 2357JVM_END 2358 2359 2360JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index)) 2361 JVMWrapper("JVM_GetMethodIxExceptionsCount"); 2362 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2363 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2364 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2365 return method->checked_exceptions_length(); 2366JVM_END 2367 2368 2369JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code)) 2370 JVMWrapper("JVM_GetMethodIxByteCode"); 2371 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2372 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2373 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2374 memcpy(code, method->code_base(), method->code_size()); 2375JVM_END 2376 2377 2378JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index)) 2379 JVMWrapper("JVM_GetMethodIxByteCodeLength"); 2380 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2381 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2382 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2383 return method->code_size(); 2384JVM_END 2385 2386 2387JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry)) 2388 JVMWrapper("JVM_GetMethodIxExceptionTableEntry"); 2389 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2390 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2391 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2392 ExceptionTable extable(method); 2393 entry->start_pc = extable.start_pc(entry_index); 2394 entry->end_pc = extable.end_pc(entry_index); 2395 entry->handler_pc = extable.handler_pc(entry_index); 2396 entry->catchType = extable.catch_type_index(entry_index); 2397JVM_END 2398 2399 2400JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index)) 2401 JVMWrapper("JVM_GetMethodIxExceptionTableLength"); 2402 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2403 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2404 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2405 return method->exception_table_length(); 2406JVM_END 2407 2408 2409JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index)) 2410 JVMWrapper("JVM_GetMethodIxModifiers"); 2411 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2412 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2413 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2414 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2415JVM_END 2416 2417 2418JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index)) 2419 JVMWrapper("JVM_GetFieldIxModifiers"); 2420 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2421 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2422 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS; 2423JVM_END 2424 2425 2426JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index)) 2427 JVMWrapper("JVM_GetMethodIxLocalsCount"); 2428 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2429 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2430 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2431 return method->max_locals(); 2432JVM_END 2433 2434 2435JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index)) 2436 JVMWrapper("JVM_GetMethodIxArgsSize"); 2437 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2438 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2439 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2440 return method->size_of_parameters(); 2441JVM_END 2442 2443 2444JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index)) 2445 JVMWrapper("JVM_GetMethodIxMaxStack"); 2446 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2447 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2448 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2449 return method->verifier_max_stack(); 2450JVM_END 2451 2452 2453JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index)) 2454 JVMWrapper("JVM_IsConstructorIx"); 2455 ResourceMark rm(THREAD); 2456 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2457 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2458 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2459 return method->name() == vmSymbols::object_initializer_name(); 2460JVM_END 2461 2462 2463JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index)) 2464 JVMWrapper("JVM_IsVMGeneratedMethodIx"); 2465 ResourceMark rm(THREAD); 2466 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2467 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2468 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2469 return method->is_overpass(); 2470JVM_END 2471 2472JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index)) 2473 JVMWrapper("JVM_GetMethodIxIxUTF"); 2474 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2475 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2476 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2477 return method->name()->as_utf8(); 2478JVM_END 2479 2480 2481JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index)) 2482 JVMWrapper("JVM_GetMethodIxSignatureUTF"); 2483 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2484 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2485 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2486 return method->signature()->as_utf8(); 2487JVM_END 2488 2489/** 2490 * All of these JVM_GetCP-xxx methods are used by the old verifier to 2491 * read entries in the constant pool. Since the old verifier always 2492 * works on a copy of the code, it will not see any rewriting that 2493 * may possibly occur in the middle of verification. So it is important 2494 * that nothing it calls tries to use the cpCache instead of the raw 2495 * constant pool, so we must use cp->uncached_x methods when appropriate. 2496 */ 2497JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2498 JVMWrapper("JVM_GetCPFieldNameUTF"); 2499 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2500 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2501 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2502 switch (cp->tag_at(cp_index).value()) { 2503 case JVM_CONSTANT_Fieldref: 2504 return cp->uncached_name_ref_at(cp_index)->as_utf8(); 2505 default: 2506 fatal("JVM_GetCPFieldNameUTF: illegal constant"); 2507 } 2508 ShouldNotReachHere(); 2509 return NULL; 2510JVM_END 2511 2512 2513JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2514 JVMWrapper("JVM_GetCPMethodNameUTF"); 2515 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2516 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2517 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2518 switch (cp->tag_at(cp_index).value()) { 2519 case JVM_CONSTANT_InterfaceMethodref: 2520 case JVM_CONSTANT_Methodref: 2521 case JVM_CONSTANT_NameAndType: // for invokedynamic 2522 return cp->uncached_name_ref_at(cp_index)->as_utf8(); 2523 default: 2524 fatal("JVM_GetCPMethodNameUTF: illegal constant"); 2525 } 2526 ShouldNotReachHere(); 2527 return NULL; 2528JVM_END 2529 2530 2531JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) 2532 JVMWrapper("JVM_GetCPMethodSignatureUTF"); 2533 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2534 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2535 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2536 switch (cp->tag_at(cp_index).value()) { 2537 case JVM_CONSTANT_InterfaceMethodref: 2538 case JVM_CONSTANT_Methodref: 2539 case JVM_CONSTANT_NameAndType: // for invokedynamic 2540 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); 2541 default: 2542 fatal("JVM_GetCPMethodSignatureUTF: illegal constant"); 2543 } 2544 ShouldNotReachHere(); 2545 return NULL; 2546JVM_END 2547 2548 2549JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) 2550 JVMWrapper("JVM_GetCPFieldSignatureUTF"); 2551 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2552 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2553 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2554 switch (cp->tag_at(cp_index).value()) { 2555 case JVM_CONSTANT_Fieldref: 2556 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); 2557 default: 2558 fatal("JVM_GetCPFieldSignatureUTF: illegal constant"); 2559 } 2560 ShouldNotReachHere(); 2561 return NULL; 2562JVM_END 2563 2564 2565JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2566 JVMWrapper("JVM_GetCPClassNameUTF"); 2567 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2568 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2569 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2570 Symbol* classname = cp->klass_name_at(cp_index); 2571 return classname->as_utf8(); 2572JVM_END 2573 2574 2575JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2576 JVMWrapper("JVM_GetCPFieldClassNameUTF"); 2577 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2578 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2579 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2580 switch (cp->tag_at(cp_index).value()) { 2581 case JVM_CONSTANT_Fieldref: { 2582 int class_index = cp->uncached_klass_ref_index_at(cp_index); 2583 Symbol* classname = cp->klass_name_at(class_index); 2584 return classname->as_utf8(); 2585 } 2586 default: 2587 fatal("JVM_GetCPFieldClassNameUTF: illegal constant"); 2588 } 2589 ShouldNotReachHere(); 2590 return NULL; 2591JVM_END 2592 2593 2594JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2595 JVMWrapper("JVM_GetCPMethodClassNameUTF"); 2596 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2597 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2598 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2599 switch (cp->tag_at(cp_index).value()) { 2600 case JVM_CONSTANT_Methodref: 2601 case JVM_CONSTANT_InterfaceMethodref: { 2602 int class_index = cp->uncached_klass_ref_index_at(cp_index); 2603 Symbol* classname = cp->klass_name_at(class_index); 2604 return classname->as_utf8(); 2605 } 2606 default: 2607 fatal("JVM_GetCPMethodClassNameUTF: illegal constant"); 2608 } 2609 ShouldNotReachHere(); 2610 return NULL; 2611JVM_END 2612 2613 2614JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) 2615 JVMWrapper("JVM_GetCPFieldModifiers"); 2616 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2617 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls)); 2618 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2619 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); 2620 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2621 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants(); 2622 switch (cp->tag_at(cp_index).value()) { 2623 case JVM_CONSTANT_Fieldref: { 2624 Symbol* name = cp->uncached_name_ref_at(cp_index); 2625 Symbol* signature = cp->uncached_signature_ref_at(cp_index); 2626 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) { 2627 if (fs.name() == name && fs.signature() == signature) { 2628 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS; 2629 } 2630 } 2631 return -1; 2632 } 2633 default: 2634 fatal("JVM_GetCPFieldModifiers: illegal constant"); 2635 } 2636 ShouldNotReachHere(); 2637 return 0; 2638JVM_END 2639 2640 2641JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) 2642 JVMWrapper("JVM_GetCPMethodModifiers"); 2643 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2644 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls)); 2645 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2646 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); 2647 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2648 switch (cp->tag_at(cp_index).value()) { 2649 case JVM_CONSTANT_Methodref: 2650 case JVM_CONSTANT_InterfaceMethodref: { 2651 Symbol* name = cp->uncached_name_ref_at(cp_index); 2652 Symbol* signature = cp->uncached_signature_ref_at(cp_index); 2653 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods(); 2654 int methods_count = methods->length(); 2655 for (int i = 0; i < methods_count; i++) { 2656 Method* method = methods->at(i); 2657 if (method->name() == name && method->signature() == signature) { 2658 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2659 } 2660 } 2661 return -1; 2662 } 2663 default: 2664 fatal("JVM_GetCPMethodModifiers: illegal constant"); 2665 } 2666 ShouldNotReachHere(); 2667 return 0; 2668JVM_END 2669 2670 2671// Misc ////////////////////////////////////////////////////////////////////////////////////////////// 2672 2673JVM_LEAF(void, JVM_ReleaseUTF(const char *utf)) 2674 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything 2675JVM_END 2676 2677 2678JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2)) 2679 JVMWrapper("JVM_IsSameClassPackage"); 2680 oop class1_mirror = JNIHandles::resolve_non_null(class1); 2681 oop class2_mirror = JNIHandles::resolve_non_null(class2); 2682 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror); 2683 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror); 2684 return (jboolean) Reflection::is_same_class_package(klass1, klass2); 2685JVM_END 2686 2687 2688// IO functions //////////////////////////////////////////////////////////////////////////////////////// 2689 2690JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode)) 2691 JVMWrapper2("JVM_Open (%s)", fname); 2692 2693 //%note jvm_r6 2694 int result = os::open(fname, flags, mode); 2695 if (result >= 0) { 2696 return result; 2697 } else { 2698 switch(errno) { 2699 case EEXIST: 2700 return JVM_EEXIST; 2701 default: 2702 return -1; 2703 } 2704 } 2705JVM_END 2706 2707 2708JVM_LEAF(jint, JVM_Close(jint fd)) 2709 JVMWrapper2("JVM_Close (0x%x)", fd); 2710 //%note jvm_r6 2711 return os::close(fd); 2712JVM_END 2713 2714 2715JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes)) 2716 JVMWrapper2("JVM_Read (0x%x)", fd); 2717 2718 //%note jvm_r6 2719 return (jint)os::restartable_read(fd, buf, nbytes); 2720JVM_END 2721 2722 2723JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes)) 2724 JVMWrapper2("JVM_Write (0x%x)", fd); 2725 2726 //%note jvm_r6 2727 return (jint)os::write(fd, buf, nbytes); 2728JVM_END 2729 2730 2731JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes)) 2732 JVMWrapper2("JVM_Available (0x%x)", fd); 2733 //%note jvm_r6 2734 return os::available(fd, pbytes); 2735JVM_END 2736 2737 2738JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence)) 2739 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence); 2740 //%note jvm_r6 2741 return os::lseek(fd, offset, whence); 2742JVM_END 2743 2744 2745JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length)) 2746 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length); 2747 return os::ftruncate(fd, length); 2748JVM_END 2749 2750 2751JVM_LEAF(jint, JVM_Sync(jint fd)) 2752 JVMWrapper2("JVM_Sync (0x%x)", fd); 2753 //%note jvm_r6 2754 return os::fsync(fd); 2755JVM_END 2756 2757 2758// Printing support ////////////////////////////////////////////////// 2759extern "C" { 2760 2761int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) { 2762 // see bug 4399518, 4417214 2763 if ((intptr_t)count <= 0) return -1; 2764 return vsnprintf(str, count, fmt, args); 2765} 2766 2767 2768int jio_snprintf(char *str, size_t count, const char *fmt, ...) { 2769 va_list args; 2770 int len; 2771 va_start(args, fmt); 2772 len = jio_vsnprintf(str, count, fmt, args); 2773 va_end(args); 2774 return len; 2775} 2776 2777 2778int jio_fprintf(FILE* f, const char *fmt, ...) { 2779 int len; 2780 va_list args; 2781 va_start(args, fmt); 2782 len = jio_vfprintf(f, fmt, args); 2783 va_end(args); 2784 return len; 2785} 2786 2787 2788int jio_vfprintf(FILE* f, const char *fmt, va_list args) { 2789 if (Arguments::vfprintf_hook() != NULL) { 2790 return Arguments::vfprintf_hook()(f, fmt, args); 2791 } else { 2792 return vfprintf(f, fmt, args); 2793 } 2794} 2795 2796 2797JNIEXPORT int jio_printf(const char *fmt, ...) { 2798 int len; 2799 va_list args; 2800 va_start(args, fmt); 2801 len = jio_vfprintf(defaultStream::output_stream(), fmt, args); 2802 va_end(args); 2803 return len; 2804} 2805 2806 2807// HotSpot specific jio method 2808void jio_print(const char* s) { 2809 // Try to make this function as atomic as possible. 2810 if (Arguments::vfprintf_hook() != NULL) { 2811 jio_fprintf(defaultStream::output_stream(), "%s", s); 2812 } else { 2813 // Make an unused local variable to avoid warning from gcc 4.x compiler. 2814 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s)); 2815 } 2816} 2817 2818} // Extern C 2819 2820// java.lang.Thread ////////////////////////////////////////////////////////////////////////////// 2821 2822// In most of the JVM Thread support functions we need to be sure to lock the Threads_lock 2823// to prevent the target thread from exiting after we have a pointer to the C++ Thread or 2824// OSThread objects. The exception to this rule is when the target object is the thread 2825// doing the operation, in which case we know that the thread won't exit until the 2826// operation is done (all exits being voluntary). There are a few cases where it is 2827// rather silly to do operations on yourself, like resuming yourself or asking whether 2828// you are alive. While these can still happen, they are not subject to deadlocks if 2829// the lock is held while the operation occurs (this is not the case for suspend, for 2830// instance), and are very unlikely. Because IsAlive needs to be fast and its 2831// implementation is local to this file, we always lock Threads_lock for that one. 2832 2833static void thread_entry(JavaThread* thread, TRAPS) { 2834 HandleMark hm(THREAD); 2835 Handle obj(THREAD, thread->threadObj()); 2836 JavaValue result(T_VOID); 2837 JavaCalls::call_virtual(&result, 2838 obj, 2839 KlassHandle(THREAD, SystemDictionary::Thread_klass()), 2840 vmSymbols::run_method_name(), 2841 vmSymbols::void_method_signature(), 2842 THREAD); 2843} 2844 2845 2846JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread)) 2847 JVMWrapper("JVM_StartThread"); 2848 JavaThread *native_thread = NULL; 2849 2850 // We cannot hold the Threads_lock when we throw an exception, 2851 // due to rank ordering issues. Example: we might need to grab the 2852 // Heap_lock while we construct the exception. 2853 bool throw_illegal_thread_state = false; 2854 2855 // We must release the Threads_lock before we can post a jvmti event 2856 // in Thread::start. 2857 { 2858 // Ensure that the C++ Thread and OSThread structures aren't freed before 2859 // we operate. 2860 MutexLocker mu(Threads_lock); 2861 2862 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent 2863 // re-starting an already started thread, so we should usually find 2864 // that the JavaThread is null. However for a JNI attached thread 2865 // there is a small window between the Thread object being created 2866 // (with its JavaThread set) and the update to its threadStatus, so we 2867 // have to check for this 2868 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) { 2869 throw_illegal_thread_state = true; 2870 } else { 2871 // We could also check the stillborn flag to see if this thread was already stopped, but 2872 // for historical reasons we let the thread detect that itself when it starts running 2873 2874 jlong size = 2875 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread)); 2876 // Allocate the C++ Thread structure and create the native thread. The 2877 // stack size retrieved from java is signed, but the constructor takes 2878 // size_t (an unsigned type), so avoid passing negative values which would 2879 // result in really large stacks. 2880 size_t sz = size > 0 ? (size_t) size : 0; 2881 native_thread = new JavaThread(&thread_entry, sz); 2882 2883 // At this point it may be possible that no osthread was created for the 2884 // JavaThread due to lack of memory. Check for this situation and throw 2885 // an exception if necessary. Eventually we may want to change this so 2886 // that we only grab the lock if the thread was created successfully - 2887 // then we can also do this check and throw the exception in the 2888 // JavaThread constructor. 2889 if (native_thread->osthread() != NULL) { 2890 // Note: the current thread is not being used within "prepare". 2891 native_thread->prepare(jthread); 2892 } 2893 } 2894 } 2895 2896 if (throw_illegal_thread_state) { 2897 THROW(vmSymbols::java_lang_IllegalThreadStateException()); 2898 } 2899 2900 assert(native_thread != NULL, "Starting null thread?"); 2901 2902 if (native_thread->osthread() == NULL) { 2903 // No one should hold a reference to the 'native_thread'. 2904 delete native_thread; 2905 if (JvmtiExport::should_post_resource_exhausted()) { 2906 JvmtiExport::post_resource_exhausted( 2907 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS, 2908 os::native_thread_creation_failed_msg()); 2909 } 2910 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), 2911 os::native_thread_creation_failed_msg()); 2912 } 2913 2914 Thread::start(native_thread); 2915 2916JVM_END 2917 2918// JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints 2919// before the quasi-asynchronous exception is delivered. This is a little obtrusive, 2920// but is thought to be reliable and simple. In the case, where the receiver is the 2921// same thread as the sender, no safepoint is needed. 2922JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable)) 2923 JVMWrapper("JVM_StopThread"); 2924 2925 oop java_throwable = JNIHandles::resolve(throwable); 2926 if (java_throwable == NULL) { 2927 THROW(vmSymbols::java_lang_NullPointerException()); 2928 } 2929 oop java_thread = JNIHandles::resolve_non_null(jthread); 2930 JavaThread* receiver = java_lang_Thread::thread(java_thread); 2931 Events::log_exception(JavaThread::current(), 2932 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", 2933 receiver, (address)java_thread, throwable); 2934 // First check if thread is alive 2935 if (receiver != NULL) { 2936 // Check if exception is getting thrown at self (use oop equality, since the 2937 // target object might exit) 2938 if (java_thread == thread->threadObj()) { 2939 THROW_OOP(java_throwable); 2940 } else { 2941 // Enques a VM_Operation to stop all threads and then deliver the exception... 2942 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable)); 2943 } 2944 } 2945 else { 2946 // Either: 2947 // - target thread has not been started before being stopped, or 2948 // - target thread already terminated 2949 // We could read the threadStatus to determine which case it is 2950 // but that is overkill as it doesn't matter. We must set the 2951 // stillborn flag for the first case, and if the thread has already 2952 // exited setting this flag has no affect 2953 java_lang_Thread::set_stillborn(java_thread); 2954 } 2955JVM_END 2956 2957 2958JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread)) 2959 JVMWrapper("JVM_IsThreadAlive"); 2960 2961 oop thread_oop = JNIHandles::resolve_non_null(jthread); 2962 return java_lang_Thread::is_alive(thread_oop); 2963JVM_END 2964 2965 2966JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread)) 2967 JVMWrapper("JVM_SuspendThread"); 2968 oop java_thread = JNIHandles::resolve_non_null(jthread); 2969 JavaThread* receiver = java_lang_Thread::thread(java_thread); 2970 2971 if (receiver != NULL) { 2972 // thread has run and has not exited (still on threads list) 2973 2974 { 2975 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag); 2976 if (receiver->is_external_suspend()) { 2977 // Don't allow nested external suspend requests. We can't return 2978 // an error from this interface so just ignore the problem. 2979 return; 2980 } 2981 if (receiver->is_exiting()) { // thread is in the process of exiting 2982 return; 2983 } 2984 receiver->set_external_suspend(); 2985 } 2986 2987 // java_suspend() will catch threads in the process of exiting 2988 // and will ignore them. 2989 receiver->java_suspend(); 2990 2991 // It would be nice to have the following assertion in all the 2992 // time, but it is possible for a racing resume request to have 2993 // resumed this thread right after we suspended it. Temporarily 2994 // enable this assertion if you are chasing a different kind of 2995 // bug. 2996 // 2997 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL || 2998 // receiver->is_being_ext_suspended(), "thread is not suspended"); 2999 } 3000JVM_END 3001 3002 3003JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread)) 3004 JVMWrapper("JVM_ResumeThread"); 3005 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate. 3006 // We need to *always* get the threads lock here, since this operation cannot be allowed during 3007 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other 3008 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code 3009 // looks at it. 3010 MutexLocker ml(Threads_lock); 3011 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 3012 if (thr != NULL) { 3013 // the thread has run and is not in the process of exiting 3014 thr->java_resume(); 3015 } 3016JVM_END 3017 3018 3019JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio)) 3020 JVMWrapper("JVM_SetThreadPriority"); 3021 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 3022 MutexLocker ml(Threads_lock); 3023 oop java_thread = JNIHandles::resolve_non_null(jthread); 3024 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio); 3025 JavaThread* thr = java_lang_Thread::thread(java_thread); 3026 if (thr != NULL) { // Thread not yet started; priority pushed down when it is 3027 Thread::set_priority(thr, (ThreadPriority)prio); 3028 } 3029JVM_END 3030 3031 3032JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass)) 3033 JVMWrapper("JVM_Yield"); 3034 if (os::dont_yield()) return; 3035 HOTSPOT_THREAD_YIELD(); 3036 3037 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield. 3038 // Critical for similar threading behaviour 3039 if (ConvertYieldToSleep) { 3040 os::sleep(thread, MinSleepInterval, false); 3041 } else { 3042 os::yield(); 3043 } 3044JVM_END 3045 3046 3047JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis)) 3048 JVMWrapper("JVM_Sleep"); 3049 3050 if (millis < 0) { 3051 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative"); 3052 } 3053 3054 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) { 3055 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); 3056 } 3057 3058 // Save current thread state and restore it at the end of this block. 3059 // And set new thread state to SLEEPING. 3060 JavaThreadSleepState jtss(thread); 3061 3062 HOTSPOT_THREAD_SLEEP_BEGIN(millis); 3063 3064 EventThreadSleep event; 3065 3066 if (millis == 0) { 3067 // When ConvertSleepToYield is on, this matches the classic VM implementation of 3068 // JVM_Sleep. Critical for similar threading behaviour (Win32) 3069 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep 3070 // for SOLARIS 3071 if (ConvertSleepToYield) { 3072 os::yield(); 3073 } else { 3074 ThreadState old_state = thread->osthread()->get_state(); 3075 thread->osthread()->set_state(SLEEPING); 3076 os::sleep(thread, MinSleepInterval, false); 3077 thread->osthread()->set_state(old_state); 3078 } 3079 } else { 3080 ThreadState old_state = thread->osthread()->get_state(); 3081 thread->osthread()->set_state(SLEEPING); 3082 if (os::sleep(thread, millis, true) == OS_INTRPT) { 3083 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on 3084 // us while we were sleeping. We do not overwrite those. 3085 if (!HAS_PENDING_EXCEPTION) { 3086 if (event.should_commit()) { 3087 event.set_time(millis); 3088 event.commit(); 3089 } 3090 HOTSPOT_THREAD_SLEEP_END(1); 3091 3092 // TODO-FIXME: THROW_MSG returns which means we will not call set_state() 3093 // to properly restore the thread state. That's likely wrong. 3094 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); 3095 } 3096 } 3097 thread->osthread()->set_state(old_state); 3098 } 3099 if (event.should_commit()) { 3100 event.set_time(millis); 3101 event.commit(); 3102 } 3103 HOTSPOT_THREAD_SLEEP_END(0); 3104JVM_END 3105 3106JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass)) 3107 JVMWrapper("JVM_CurrentThread"); 3108 oop jthread = thread->threadObj(); 3109 assert (thread != NULL, "no current thread!"); 3110 return JNIHandles::make_local(env, jthread); 3111JVM_END 3112 3113 3114JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread)) 3115 JVMWrapper("JVM_CountStackFrames"); 3116 3117 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 3118 oop java_thread = JNIHandles::resolve_non_null(jthread); 3119 bool throw_illegal_thread_state = false; 3120 int count = 0; 3121 3122 { 3123 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 3124 // We need to re-resolve the java_thread, since a GC might have happened during the 3125 // acquire of the lock 3126 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 3127 3128 if (thr == NULL) { 3129 // do nothing 3130 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) { 3131 // Check whether this java thread has been suspended already. If not, throws 3132 // IllegalThreadStateException. We defer to throw that exception until 3133 // Threads_lock is released since loading exception class has to leave VM. 3134 // The correct way to test a thread is actually suspended is 3135 // wait_for_ext_suspend_completion(), but we can't call that while holding 3136 // the Threads_lock. The above tests are sufficient for our purposes 3137 // provided the walkability of the stack is stable - which it isn't 3138 // 100% but close enough for most practical purposes. 3139 throw_illegal_thread_state = true; 3140 } else { 3141 // Count all java activation, i.e., number of vframes 3142 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) { 3143 // Native frames are not counted 3144 if (!vfst.method()->is_native()) count++; 3145 } 3146 } 3147 } 3148 3149 if (throw_illegal_thread_state) { 3150 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(), 3151 "this thread is not suspended"); 3152 } 3153 return count; 3154JVM_END 3155 3156// Consider: A better way to implement JVM_Interrupt() is to acquire 3157// Threads_lock to resolve the jthread into a Thread pointer, fetch 3158// Thread->platformevent, Thread->native_thr, Thread->parker, etc., 3159// drop Threads_lock, and the perform the unpark() and thr_kill() operations 3160// outside the critical section. Threads_lock is hot so we want to minimize 3161// the hold-time. A cleaner interface would be to decompose interrupt into 3162// two steps. The 1st phase, performed under Threads_lock, would return 3163// a closure that'd be invoked after Threads_lock was dropped. 3164// This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and 3165// admit spurious wakeups. 3166 3167JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread)) 3168 JVMWrapper("JVM_Interrupt"); 3169 3170 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 3171 oop java_thread = JNIHandles::resolve_non_null(jthread); 3172 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 3173 // We need to re-resolve the java_thread, since a GC might have happened during the 3174 // acquire of the lock 3175 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 3176 if (thr != NULL) { 3177 Thread::interrupt(thr); 3178 } 3179JVM_END 3180 3181 3182JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted)) 3183 JVMWrapper("JVM_IsInterrupted"); 3184 3185 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 3186 oop java_thread = JNIHandles::resolve_non_null(jthread); 3187 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 3188 // We need to re-resolve the java_thread, since a GC might have happened during the 3189 // acquire of the lock 3190 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 3191 if (thr == NULL) { 3192 return JNI_FALSE; 3193 } else { 3194 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0); 3195 } 3196JVM_END 3197 3198 3199// Return true iff the current thread has locked the object passed in 3200 3201JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj)) 3202 JVMWrapper("JVM_HoldsLock"); 3203 assert(THREAD->is_Java_thread(), "sanity check"); 3204 if (obj == NULL) { 3205 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); 3206 } 3207 Handle h_obj(THREAD, JNIHandles::resolve(obj)); 3208 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj); 3209JVM_END 3210 3211 3212JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass)) 3213 JVMWrapper("JVM_DumpAllStacks"); 3214 VM_PrintThreads op; 3215 VMThread::execute(&op); 3216 if (JvmtiExport::should_post_data_dump()) { 3217 JvmtiExport::post_data_dump(); 3218 } 3219JVM_END 3220 3221JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name)) 3222 JVMWrapper("JVM_SetNativeThreadName"); 3223 ResourceMark rm(THREAD); 3224 oop java_thread = JNIHandles::resolve_non_null(jthread); 3225 JavaThread* thr = java_lang_Thread::thread(java_thread); 3226 // Thread naming only supported for the current thread, doesn't work for 3227 // target threads. 3228 if (Thread::current() == thr && !thr->has_attached_via_jni()) { 3229 // we don't set the name of an attached thread to avoid stepping 3230 // on other programs 3231 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); 3232 os::set_native_thread_name(thread_name); 3233 } 3234JVM_END 3235 3236// java.lang.SecurityManager /////////////////////////////////////////////////////////////////////// 3237 3238static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) { 3239 assert(jthread->is_Java_thread(), "must be a Java thread"); 3240 if (jthread->privileged_stack_top() == NULL) return false; 3241 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) { 3242 oop loader = jthread->privileged_stack_top()->class_loader(); 3243 if (loader == NULL) return true; 3244 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); 3245 if (trusted) return true; 3246 } 3247 return false; 3248} 3249 3250JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env)) 3251 JVMWrapper("JVM_CurrentLoadedClass"); 3252 ResourceMark rm(THREAD); 3253 3254 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3255 // if a method in a class in a trusted loader is in a doPrivileged, return NULL 3256 bool trusted = is_trusted_frame(thread, &vfst); 3257 if (trusted) return NULL; 3258 3259 Method* m = vfst.method(); 3260 if (!m->is_native()) { 3261 InstanceKlass* holder = m->method_holder(); 3262 oop loader = holder->class_loader(); 3263 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3264 return (jclass) JNIHandles::make_local(env, holder->java_mirror()); 3265 } 3266 } 3267 } 3268 return NULL; 3269JVM_END 3270 3271 3272JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env)) 3273 JVMWrapper("JVM_CurrentClassLoader"); 3274 ResourceMark rm(THREAD); 3275 3276 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3277 3278 // if a method in a class in a trusted loader is in a doPrivileged, return NULL 3279 bool trusted = is_trusted_frame(thread, &vfst); 3280 if (trusted) return NULL; 3281 3282 Method* m = vfst.method(); 3283 if (!m->is_native()) { 3284 InstanceKlass* holder = m->method_holder(); 3285 assert(holder->is_klass(), "just checking"); 3286 oop loader = holder->class_loader(); 3287 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3288 return JNIHandles::make_local(env, loader); 3289 } 3290 } 3291 } 3292 return NULL; 3293JVM_END 3294 3295 3296JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env)) 3297 JVMWrapper("JVM_GetClassContext"); 3298 ResourceMark rm(THREAD); 3299 JvmtiVMObjectAllocEventCollector oam; 3300 vframeStream vfst(thread); 3301 3302 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) { 3303 // This must only be called from SecurityManager.getClassContext 3304 Method* m = vfst.method(); 3305 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() && 3306 m->name() == vmSymbols::getClassContext_name() && 3307 m->signature() == vmSymbols::void_class_array_signature())) { 3308 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext"); 3309 } 3310 } 3311 3312 // Collect method holders 3313 GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>(); 3314 for (; !vfst.at_end(); vfst.security_next()) { 3315 Method* m = vfst.method(); 3316 // Native frames are not returned 3317 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) { 3318 Klass* holder = m->method_holder(); 3319 assert(holder->is_klass(), "just checking"); 3320 klass_array->append(holder); 3321 } 3322 } 3323 3324 // Create result array of type [Ljava/lang/Class; 3325 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL); 3326 // Fill in mirrors corresponding to method holders 3327 for (int i = 0; i < klass_array->length(); i++) { 3328 result->obj_at_put(i, klass_array->at(i)->java_mirror()); 3329 } 3330 3331 return (jobjectArray) JNIHandles::make_local(env, result); 3332JVM_END 3333 3334 3335JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name)) 3336 JVMWrapper("JVM_ClassDepth"); 3337 ResourceMark rm(THREAD); 3338 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); 3339 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0); 3340 3341 const char* str = java_lang_String::as_utf8_string(class_name_str()); 3342 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str)); 3343 if (class_name_sym == NULL) { 3344 return -1; 3345 } 3346 3347 int depth = 0; 3348 3349 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3350 if (!vfst.method()->is_native()) { 3351 InstanceKlass* holder = vfst.method()->method_holder(); 3352 assert(holder->is_klass(), "just checking"); 3353 if (holder->name() == class_name_sym) { 3354 return depth; 3355 } 3356 depth++; 3357 } 3358 } 3359 return -1; 3360JVM_END 3361 3362 3363JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env)) 3364 JVMWrapper("JVM_ClassLoaderDepth"); 3365 ResourceMark rm(THREAD); 3366 int depth = 0; 3367 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3368 // if a method in a class in a trusted loader is in a doPrivileged, return -1 3369 bool trusted = is_trusted_frame(thread, &vfst); 3370 if (trusted) return -1; 3371 3372 Method* m = vfst.method(); 3373 if (!m->is_native()) { 3374 InstanceKlass* holder = m->method_holder(); 3375 assert(holder->is_klass(), "just checking"); 3376 oop loader = holder->class_loader(); 3377 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3378 return depth; 3379 } 3380 depth++; 3381 } 3382 } 3383 return -1; 3384JVM_END 3385 3386 3387// java.lang.Package //////////////////////////////////////////////////////////////// 3388 3389 3390JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name)) 3391 JVMWrapper("JVM_GetSystemPackage"); 3392 ResourceMark rm(THREAD); 3393 JvmtiVMObjectAllocEventCollector oam; 3394 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); 3395 oop result = ClassLoader::get_system_package(str, CHECK_NULL); 3396 return (jstring) JNIHandles::make_local(result); 3397JVM_END 3398 3399 3400JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env)) 3401 JVMWrapper("JVM_GetSystemPackages"); 3402 JvmtiVMObjectAllocEventCollector oam; 3403 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL); 3404 return (jobjectArray) JNIHandles::make_local(result); 3405JVM_END 3406 3407 3408// ObjectInputStream /////////////////////////////////////////////////////////////// 3409 3410bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) { 3411 if (current_class == NULL) { 3412 return true; 3413 } 3414 if ((current_class == field_class) || access.is_public()) { 3415 return true; 3416 } 3417 3418 if (access.is_protected()) { 3419 // See if current_class is a subclass of field_class 3420 if (current_class->is_subclass_of(field_class)) { 3421 return true; 3422 } 3423 } 3424 3425 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class)); 3426} 3427 3428 3429// JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4 3430JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass)) 3431 JVMWrapper("JVM_AllocateNewObject"); 3432 JvmtiVMObjectAllocEventCollector oam; 3433 // Receiver is not used 3434 oop curr_mirror = JNIHandles::resolve_non_null(currClass); 3435 oop init_mirror = JNIHandles::resolve_non_null(initClass); 3436 3437 // Cannot instantiate primitive types 3438 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) { 3439 ResourceMark rm(THREAD); 3440 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3441 } 3442 3443 // Arrays not allowed here, must use JVM_AllocateNewArray 3444 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() || 3445 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) { 3446 ResourceMark rm(THREAD); 3447 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3448 } 3449 3450 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror)); 3451 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror)); 3452 3453 assert(curr_klass->is_subclass_of(init_klass()), "just checking"); 3454 3455 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly. 3456 curr_klass->check_valid_for_instantiation(false, CHECK_NULL); 3457 3458 // Make sure klass is initialized, since we are about to instantiate one of them. 3459 curr_klass->initialize(CHECK_NULL); 3460 3461 methodHandle m (THREAD, 3462 init_klass->find_method(vmSymbols::object_initializer_name(), 3463 vmSymbols::void_method_signature())); 3464 if (m.is_null()) { 3465 ResourceMark rm(THREAD); 3466 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), 3467 Method::name_and_sig_as_C_string(init_klass(), 3468 vmSymbols::object_initializer_name(), 3469 vmSymbols::void_method_signature())); 3470 } 3471 3472 if (curr_klass == init_klass && !m->is_public()) { 3473 // Calling the constructor for class 'curr_klass'. 3474 // Only allow calls to a public no-arg constructor. 3475 // This path corresponds to creating an Externalizable object. 3476 THROW_0(vmSymbols::java_lang_IllegalAccessException()); 3477 } 3478 3479 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) { 3480 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb' 3481 THROW_0(vmSymbols::java_lang_IllegalAccessException()); 3482 } 3483 3484 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL); 3485 // Call constructor m. This might call a constructor higher up in the hierachy 3486 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL); 3487 3488 return JNIHandles::make_local(obj()); 3489JVM_END 3490 3491 3492JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length)) 3493 JVMWrapper("JVM_AllocateNewArray"); 3494 JvmtiVMObjectAllocEventCollector oam; 3495 oop mirror = JNIHandles::resolve_non_null(currClass); 3496 3497 if (java_lang_Class::is_primitive(mirror)) { 3498 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3499 } 3500 Klass* k = java_lang_Class::as_Klass(mirror); 3501 oop result; 3502 3503 if (k->oop_is_typeArray()) { 3504 // typeArray 3505 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL); 3506 } else if (k->oop_is_objArray()) { 3507 // objArray 3508 ObjArrayKlass* oak = ObjArrayKlass::cast(k); 3509 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior) 3510 result = oak->allocate(length, CHECK_NULL); 3511 } else { 3512 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3513 } 3514 return JNIHandles::make_local(env, result); 3515JVM_END 3516 3517 3518// Return the first non-null class loader up the execution stack, or null 3519// if only code from the null class loader is on the stack. 3520 3521JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env)) 3522 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3523 // UseNewReflection 3524 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection 3525 oop loader = vfst.method()->method_holder()->class_loader(); 3526 if (loader != NULL) { 3527 return JNIHandles::make_local(env, loader); 3528 } 3529 } 3530 return NULL; 3531JVM_END 3532 3533 3534// Load a class relative to the most recent class on the stack with a non-null 3535// classloader. 3536// This function has been deprecated and should not be considered part of the 3537// specified JVM interface. 3538 3539JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver, 3540 jclass currClass, jstring currClassName)) 3541 JVMWrapper("JVM_LoadClass0"); 3542 // Receiver is not used 3543 ResourceMark rm(THREAD); 3544 3545 // Class name argument is not guaranteed to be in internal format 3546 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName)); 3547 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL); 3548 3549 const char* str = java_lang_String::as_utf8_string(string()); 3550 3551 if (str == NULL || (int)strlen(str) > Symbol::max_length()) { 3552 // It's impossible to create this class; the name cannot fit 3553 // into the constant pool. 3554 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str); 3555 } 3556 3557 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL); 3558 Handle curr_klass (THREAD, JNIHandles::resolve(currClass)); 3559 // Find the most recent class on the stack with a non-null classloader 3560 oop loader = NULL; 3561 oop protection_domain = NULL; 3562 if (curr_klass.is_null()) { 3563 for (vframeStream vfst(thread); 3564 !vfst.at_end() && loader == NULL; 3565 vfst.next()) { 3566 if (!vfst.method()->is_native()) { 3567 InstanceKlass* holder = vfst.method()->method_holder(); 3568 loader = holder->class_loader(); 3569 protection_domain = holder->protection_domain(); 3570 } 3571 } 3572 } else { 3573 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass()); 3574 loader = InstanceKlass::cast(curr_klass_oop)->class_loader(); 3575 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain(); 3576 } 3577 Handle h_loader(THREAD, loader); 3578 Handle h_prot (THREAD, protection_domain); 3579 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot, 3580 false, thread); 3581 if (TraceClassResolution && result != NULL) { 3582 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3583 } 3584 return result; 3585JVM_END 3586 3587 3588// Array /////////////////////////////////////////////////////////////////////////////////////////// 3589 3590 3591// resolve array handle and check arguments 3592static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) { 3593 if (arr == NULL) { 3594 THROW_0(vmSymbols::java_lang_NullPointerException()); 3595 } 3596 oop a = JNIHandles::resolve_non_null(arr); 3597 if (!a->is_array() || (type_array_only && !a->is_typeArray())) { 3598 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array"); 3599 } 3600 return arrayOop(a); 3601} 3602 3603 3604JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr)) 3605 JVMWrapper("JVM_GetArrayLength"); 3606 arrayOop a = check_array(env, arr, false, CHECK_0); 3607 return a->length(); 3608JVM_END 3609 3610 3611JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index)) 3612 JVMWrapper("JVM_Array_Get"); 3613 JvmtiVMObjectAllocEventCollector oam; 3614 arrayOop a = check_array(env, arr, false, CHECK_NULL); 3615 jvalue value; 3616 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL); 3617 oop box = Reflection::box(&value, type, CHECK_NULL); 3618 return JNIHandles::make_local(env, box); 3619JVM_END 3620 3621 3622JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode)) 3623 JVMWrapper("JVM_GetPrimitiveArrayElement"); 3624 jvalue value; 3625 value.i = 0; // to initialize value before getting used in CHECK 3626 arrayOop a = check_array(env, arr, true, CHECK_(value)); 3627 assert(a->is_typeArray(), "just checking"); 3628 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value)); 3629 BasicType wide_type = (BasicType) wCode; 3630 if (type != wide_type) { 3631 Reflection::widen(&value, type, wide_type, CHECK_(value)); 3632 } 3633 return value; 3634JVM_END 3635 3636 3637JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val)) 3638 JVMWrapper("JVM_SetArrayElement"); 3639 arrayOop a = check_array(env, arr, false, CHECK); 3640 oop box = JNIHandles::resolve(val); 3641 jvalue value; 3642 value.i = 0; // to initialize value before getting used in CHECK 3643 BasicType value_type; 3644 if (a->is_objArray()) { 3645 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array 3646 value_type = Reflection::unbox_for_regular_object(box, &value); 3647 } else { 3648 value_type = Reflection::unbox_for_primitive(box, &value, CHECK); 3649 } 3650 Reflection::array_set(&value, a, index, value_type, CHECK); 3651JVM_END 3652 3653 3654JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode)) 3655 JVMWrapper("JVM_SetPrimitiveArrayElement"); 3656 arrayOop a = check_array(env, arr, true, CHECK); 3657 assert(a->is_typeArray(), "just checking"); 3658 BasicType value_type = (BasicType) vCode; 3659 Reflection::array_set(&v, a, index, value_type, CHECK); 3660JVM_END 3661 3662 3663JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length)) 3664 JVMWrapper("JVM_NewArray"); 3665 JvmtiVMObjectAllocEventCollector oam; 3666 oop element_mirror = JNIHandles::resolve(eltClass); 3667 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL); 3668 return JNIHandles::make_local(env, result); 3669JVM_END 3670 3671 3672JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim)) 3673 JVMWrapper("JVM_NewMultiArray"); 3674 JvmtiVMObjectAllocEventCollector oam; 3675 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL); 3676 oop element_mirror = JNIHandles::resolve(eltClass); 3677 assert(dim_array->is_typeArray(), "just checking"); 3678 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL); 3679 return JNIHandles::make_local(env, result); 3680JVM_END 3681 3682 3683// Networking library support //////////////////////////////////////////////////////////////////// 3684 3685JVM_LEAF(jint, JVM_InitializeSocketLibrary()) 3686 JVMWrapper("JVM_InitializeSocketLibrary"); 3687 return 0; 3688JVM_END 3689 3690 3691JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol)) 3692 JVMWrapper("JVM_Socket"); 3693 return os::socket(domain, type, protocol); 3694JVM_END 3695 3696 3697JVM_LEAF(jint, JVM_SocketClose(jint fd)) 3698 JVMWrapper2("JVM_SocketClose (0x%x)", fd); 3699 //%note jvm_r6 3700 return os::socket_close(fd); 3701JVM_END 3702 3703 3704JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto)) 3705 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd); 3706 //%note jvm_r6 3707 return os::socket_shutdown(fd, howto); 3708JVM_END 3709 3710 3711JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags)) 3712 JVMWrapper2("JVM_Recv (0x%x)", fd); 3713 //%note jvm_r6 3714 return os::recv(fd, buf, (size_t)nBytes, (uint)flags); 3715JVM_END 3716 3717 3718JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags)) 3719 JVMWrapper2("JVM_Send (0x%x)", fd); 3720 //%note jvm_r6 3721 return os::send(fd, buf, (size_t)nBytes, (uint)flags); 3722JVM_END 3723 3724 3725JVM_LEAF(jint, JVM_Timeout(int fd, long timeout)) 3726 JVMWrapper2("JVM_Timeout (0x%x)", fd); 3727 //%note jvm_r6 3728 return os::timeout(fd, timeout); 3729JVM_END 3730 3731 3732JVM_LEAF(jint, JVM_Listen(jint fd, jint count)) 3733 JVMWrapper2("JVM_Listen (0x%x)", fd); 3734 //%note jvm_r6 3735 return os::listen(fd, count); 3736JVM_END 3737 3738 3739JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len)) 3740 JVMWrapper2("JVM_Connect (0x%x)", fd); 3741 //%note jvm_r6 3742 return os::connect(fd, him, (socklen_t)len); 3743JVM_END 3744 3745 3746JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len)) 3747 JVMWrapper2("JVM_Bind (0x%x)", fd); 3748 //%note jvm_r6 3749 return os::bind(fd, him, (socklen_t)len); 3750JVM_END 3751 3752 3753JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len)) 3754 JVMWrapper2("JVM_Accept (0x%x)", fd); 3755 //%note jvm_r6 3756 socklen_t socklen = (socklen_t)(*len); 3757 jint result = os::accept(fd, him, &socklen); 3758 *len = (jint)socklen; 3759 return result; 3760JVM_END 3761 3762 3763JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen)) 3764 JVMWrapper2("JVM_RecvFrom (0x%x)", fd); 3765 //%note jvm_r6 3766 socklen_t socklen = (socklen_t)(*fromlen); 3767 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen); 3768 *fromlen = (int)socklen; 3769 return result; 3770JVM_END 3771 3772 3773JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len)) 3774 JVMWrapper2("JVM_GetSockName (0x%x)", fd); 3775 //%note jvm_r6 3776 socklen_t socklen = (socklen_t)(*len); 3777 jint result = os::get_sock_name(fd, him, &socklen); 3778 *len = (int)socklen; 3779 return result; 3780JVM_END 3781 3782 3783JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen)) 3784 JVMWrapper2("JVM_SendTo (0x%x)", fd); 3785 //%note jvm_r6 3786 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen); 3787JVM_END 3788 3789 3790JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes)) 3791 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd); 3792 //%note jvm_r6 3793 return os::socket_available(fd, pbytes); 3794JVM_END 3795 3796 3797JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen)) 3798 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); 3799 //%note jvm_r6 3800 socklen_t socklen = (socklen_t)(*optlen); 3801 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen); 3802 *optlen = (int)socklen; 3803 return result; 3804JVM_END 3805 3806 3807JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen)) 3808 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); 3809 //%note jvm_r6 3810 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen); 3811JVM_END 3812 3813 3814JVM_LEAF(int, JVM_GetHostName(char* name, int namelen)) 3815 JVMWrapper("JVM_GetHostName"); 3816 return os::get_host_name(name, namelen); 3817JVM_END 3818 3819 3820// Library support /////////////////////////////////////////////////////////////////////////// 3821 3822JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name)) 3823 //%note jvm_ct 3824 JVMWrapper2("JVM_LoadLibrary (%s)", name); 3825 char ebuf[1024]; 3826 void *load_result; 3827 { 3828 ThreadToNativeFromVM ttnfvm(thread); 3829 load_result = os::dll_load(name, ebuf, sizeof ebuf); 3830 } 3831 if (load_result == NULL) { 3832 char msg[1024]; 3833 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf); 3834 // Since 'ebuf' may contain a string encoded using 3835 // platform encoding scheme, we need to pass 3836 // Exceptions::unsafe_to_utf8 to the new_exception method 3837 // as the last argument. See bug 6367357. 3838 Handle h_exception = 3839 Exceptions::new_exception(thread, 3840 vmSymbols::java_lang_UnsatisfiedLinkError(), 3841 msg, Exceptions::unsafe_to_utf8); 3842 3843 THROW_HANDLE_0(h_exception); 3844 } 3845 return load_result; 3846JVM_END 3847 3848 3849JVM_LEAF(void, JVM_UnloadLibrary(void* handle)) 3850 JVMWrapper("JVM_UnloadLibrary"); 3851 os::dll_unload(handle); 3852JVM_END 3853 3854 3855JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name)) 3856 JVMWrapper2("JVM_FindLibraryEntry (%s)", name); 3857 return os::dll_lookup(handle, name); 3858JVM_END 3859 3860 3861// Floating point support //////////////////////////////////////////////////////////////////// 3862 3863JVM_LEAF(jboolean, JVM_IsNaN(jdouble a)) 3864 JVMWrapper("JVM_IsNaN"); 3865 return g_isnan(a); 3866JVM_END 3867 3868 3869// JNI version /////////////////////////////////////////////////////////////////////////////// 3870 3871JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version)) 3872 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version); 3873 return Threads::is_supported_jni_version_including_1_1(version); 3874JVM_END 3875 3876 3877// String support /////////////////////////////////////////////////////////////////////////// 3878 3879JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str)) 3880 JVMWrapper("JVM_InternString"); 3881 JvmtiVMObjectAllocEventCollector oam; 3882 if (str == NULL) return NULL; 3883 oop string = JNIHandles::resolve_non_null(str); 3884 oop result = StringTable::intern(string, CHECK_NULL); 3885 return (jstring) JNIHandles::make_local(env, result); 3886JVM_END 3887 3888 3889// Raw monitor support ////////////////////////////////////////////////////////////////////// 3890 3891// The lock routine below calls lock_without_safepoint_check in order to get a raw lock 3892// without interfering with the safepoint mechanism. The routines are not JVM_LEAF because 3893// they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check 3894// that only works with java threads. 3895 3896 3897JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) { 3898 VM_Exit::block_if_vm_exited(); 3899 JVMWrapper("JVM_RawMonitorCreate"); 3900 return new Mutex(Mutex::native, "JVM_RawMonitorCreate"); 3901} 3902 3903 3904JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) { 3905 VM_Exit::block_if_vm_exited(); 3906 JVMWrapper("JVM_RawMonitorDestroy"); 3907 delete ((Mutex*) mon); 3908} 3909 3910 3911JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) { 3912 VM_Exit::block_if_vm_exited(); 3913 JVMWrapper("JVM_RawMonitorEnter"); 3914 ((Mutex*) mon)->jvm_raw_lock(); 3915 return 0; 3916} 3917 3918 3919JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) { 3920 VM_Exit::block_if_vm_exited(); 3921 JVMWrapper("JVM_RawMonitorExit"); 3922 ((Mutex*) mon)->jvm_raw_unlock(); 3923} 3924 3925 3926// Support for Serialization 3927 3928typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value); 3929typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value); 3930typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value); 3931typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value); 3932 3933static IntBitsToFloatFn int_bits_to_float_fn = NULL; 3934static LongBitsToDoubleFn long_bits_to_double_fn = NULL; 3935static FloatToIntBitsFn float_to_int_bits_fn = NULL; 3936static DoubleToLongBitsFn double_to_long_bits_fn = NULL; 3937 3938 3939void initialize_converter_functions() { 3940 if (JDK_Version::is_gte_jdk14x_version()) { 3941 // These functions only exist for compatibility with 1.3.1 and earlier 3942 return; 3943 } 3944 3945 // called from universe_post_init() 3946 assert( 3947 int_bits_to_float_fn == NULL && 3948 long_bits_to_double_fn == NULL && 3949 float_to_int_bits_fn == NULL && 3950 double_to_long_bits_fn == NULL , 3951 "initialization done twice" 3952 ); 3953 // initialize 3954 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F")); 3955 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D")); 3956 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I")); 3957 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J")); 3958 // verify 3959 assert( 3960 int_bits_to_float_fn != NULL && 3961 long_bits_to_double_fn != NULL && 3962 float_to_int_bits_fn != NULL && 3963 double_to_long_bits_fn != NULL , 3964 "initialization failed" 3965 ); 3966} 3967 3968 3969 3970// Shared JNI/JVM entry points ////////////////////////////////////////////////////////////// 3971 3972jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) { 3973 // Security Note: 3974 // The Java level wrapper will perform the necessary security check allowing 3975 // us to pass the NULL as the initiating class loader. 3976 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL); 3977 3978 KlassHandle klass_handle(THREAD, klass); 3979 // Check if we should initialize the class 3980 if (init && klass_handle->oop_is_instance()) { 3981 klass_handle->initialize(CHECK_NULL); 3982 } 3983 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror()); 3984} 3985 3986 3987// Method /////////////////////////////////////////////////////////////////////////////////////////// 3988 3989JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0)) 3990 JVMWrapper("JVM_InvokeMethod"); 3991 Handle method_handle; 3992 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) { 3993 method_handle = Handle(THREAD, JNIHandles::resolve(method)); 3994 Handle receiver(THREAD, JNIHandles::resolve(obj)); 3995 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); 3996 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL); 3997 jobject res = JNIHandles::make_local(env, result); 3998 if (JvmtiExport::should_post_vm_object_alloc()) { 3999 oop ret_type = java_lang_reflect_Method::return_type(method_handle()); 4000 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!"); 4001 if (java_lang_Class::is_primitive(ret_type)) { 4002 // Only for primitive type vm allocates memory for java object. 4003 // See box() method. 4004 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); 4005 } 4006 } 4007 return res; 4008 } else { 4009 THROW_0(vmSymbols::java_lang_StackOverflowError()); 4010 } 4011JVM_END 4012 4013 4014JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0)) 4015 JVMWrapper("JVM_NewInstanceFromConstructor"); 4016 oop constructor_mirror = JNIHandles::resolve(c); 4017 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); 4018 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL); 4019 jobject res = JNIHandles::make_local(env, result); 4020 if (JvmtiExport::should_post_vm_object_alloc()) { 4021 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); 4022 } 4023 return res; 4024JVM_END 4025 4026// Atomic /////////////////////////////////////////////////////////////////////////////////////////// 4027 4028JVM_LEAF(jboolean, JVM_SupportsCX8()) 4029 JVMWrapper("JVM_SupportsCX8"); 4030 return VM_Version::supports_cx8(); 4031JVM_END 4032 4033 4034JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal)) 4035 JVMWrapper("JVM_CX8Field"); 4036 jlong res; 4037 oop o = JNIHandles::resolve(obj); 4038 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); 4039 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs); 4040 4041 assert(VM_Version::supports_cx8(), "cx8 not supported"); 4042 res = Atomic::cmpxchg(newVal, addr, oldVal); 4043 4044 return res == oldVal; 4045JVM_END 4046 4047// DTrace /////////////////////////////////////////////////////////////////// 4048 4049JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env)) 4050 JVMWrapper("JVM_DTraceGetVersion"); 4051 return (jint)JVM_TRACING_DTRACE_VERSION; 4052JVM_END 4053 4054JVM_ENTRY(jlong,JVM_DTraceActivate( 4055 JNIEnv* env, jint version, jstring module_name, jint providers_count, 4056 JVM_DTraceProvider* providers)) 4057 JVMWrapper("JVM_DTraceActivate"); 4058 return DTraceJSDT::activate( 4059 version, module_name, providers_count, providers, CHECK_0); 4060JVM_END 4061 4062JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method)) 4063 JVMWrapper("JVM_DTraceIsProbeEnabled"); 4064 return DTraceJSDT::is_probe_enabled(method); 4065JVM_END 4066 4067JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle)) 4068 JVMWrapper("JVM_DTraceDispose"); 4069 DTraceJSDT::dispose(handle); 4070JVM_END 4071 4072JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env)) 4073 JVMWrapper("JVM_DTraceIsSupported"); 4074 return DTraceJSDT::is_supported(); 4075JVM_END 4076 4077// Returns an array of all live Thread objects (VM internal JavaThreads, 4078// jvmti agent threads, and JNI attaching threads are skipped) 4079// See CR 6404306 regarding JNI attaching threads 4080JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy)) 4081 ResourceMark rm(THREAD); 4082 ThreadsListEnumerator tle(THREAD, false, false); 4083 JvmtiVMObjectAllocEventCollector oam; 4084 4085 int num_threads = tle.num_threads(); 4086 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL); 4087 objArrayHandle threads_ah(THREAD, r); 4088 4089 for (int i = 0; i < num_threads; i++) { 4090 Handle h = tle.get_threadObj(i); 4091 threads_ah->obj_at_put(i, h()); 4092 } 4093 4094 return (jobjectArray) JNIHandles::make_local(env, threads_ah()); 4095JVM_END 4096 4097 4098// Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods 4099// Return StackTraceElement[][], each element is the stack trace of a thread in 4100// the corresponding entry in the given threads array 4101JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads)) 4102 JVMWrapper("JVM_DumpThreads"); 4103 JvmtiVMObjectAllocEventCollector oam; 4104 4105 // Check if threads is null 4106 if (threads == NULL) { 4107 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 4108 } 4109 4110 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads)); 4111 objArrayHandle ah(THREAD, a); 4112 int num_threads = ah->length(); 4113 // check if threads is non-empty array 4114 if (num_threads == 0) { 4115 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); 4116 } 4117 4118 // check if threads is not an array of objects of Thread class 4119 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass(); 4120 if (k != SystemDictionary::Thread_klass()) { 4121 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); 4122 } 4123 4124 ResourceMark rm(THREAD); 4125 4126 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); 4127 for (int i = 0; i < num_threads; i++) { 4128 oop thread_obj = ah->obj_at(i); 4129 instanceHandle h(THREAD, (instanceOop) thread_obj); 4130 thread_handle_array->append(h); 4131 } 4132 4133 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL); 4134 return (jobjectArray)JNIHandles::make_local(env, stacktraces()); 4135 4136JVM_END 4137 4138// JVM monitoring and management support 4139JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version)) 4140 return Management::get_jmm_interface(version); 4141JVM_END 4142 4143// com.sun.tools.attach.VirtualMachine agent properties support 4144// 4145// Initialize the agent properties with the properties maintained in the VM 4146JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties)) 4147 JVMWrapper("JVM_InitAgentProperties"); 4148 ResourceMark rm; 4149 4150 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); 4151 4152 PUTPROP(props, "sun.java.command", Arguments::java_command()); 4153 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags()); 4154 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args()); 4155 return properties; 4156JVM_END 4157 4158JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass)) 4159{ 4160 JVMWrapper("JVM_GetEnclosingMethodInfo"); 4161 JvmtiVMObjectAllocEventCollector oam; 4162 4163 if (ofClass == NULL) { 4164 return NULL; 4165 } 4166 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass)); 4167 // Special handling for primitive objects 4168 if (java_lang_Class::is_primitive(mirror())) { 4169 return NULL; 4170 } 4171 Klass* k = java_lang_Class::as_Klass(mirror()); 4172 if (!k->oop_is_instance()) { 4173 return NULL; 4174 } 4175 instanceKlassHandle ik_h(THREAD, k); 4176 int encl_method_class_idx = ik_h->enclosing_method_class_index(); 4177 if (encl_method_class_idx == 0) { 4178 return NULL; 4179 } 4180 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL); 4181 objArrayHandle dest(THREAD, dest_o); 4182 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL); 4183 dest->obj_at_put(0, enc_k->java_mirror()); 4184 int encl_method_method_idx = ik_h->enclosing_method_method_index(); 4185 if (encl_method_method_idx != 0) { 4186 Symbol* sym = ik_h->constants()->symbol_at( 4187 extract_low_short_from_int( 4188 ik_h->constants()->name_and_type_at(encl_method_method_idx))); 4189 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 4190 dest->obj_at_put(1, str()); 4191 sym = ik_h->constants()->symbol_at( 4192 extract_high_short_from_int( 4193 ik_h->constants()->name_and_type_at(encl_method_method_idx))); 4194 str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 4195 dest->obj_at_put(2, str()); 4196 } 4197 return (jobjectArray) JNIHandles::make_local(dest()); 4198} 4199JVM_END 4200 4201JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env, 4202 jint javaThreadState)) 4203{ 4204 // If new thread states are added in future JDK and VM versions, 4205 // this should check if the JDK version is compatible with thread 4206 // states supported by the VM. Return NULL if not compatible. 4207 // 4208 // This function must map the VM java_lang_Thread::ThreadStatus 4209 // to the Java thread state that the JDK supports. 4210 // 4211 4212 typeArrayHandle values_h; 4213 switch (javaThreadState) { 4214 case JAVA_THREAD_STATE_NEW : { 4215 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4216 values_h = typeArrayHandle(THREAD, r); 4217 values_h->int_at_put(0, java_lang_Thread::NEW); 4218 break; 4219 } 4220 case JAVA_THREAD_STATE_RUNNABLE : { 4221 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4222 values_h = typeArrayHandle(THREAD, r); 4223 values_h->int_at_put(0, java_lang_Thread::RUNNABLE); 4224 break; 4225 } 4226 case JAVA_THREAD_STATE_BLOCKED : { 4227 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4228 values_h = typeArrayHandle(THREAD, r); 4229 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER); 4230 break; 4231 } 4232 case JAVA_THREAD_STATE_WAITING : { 4233 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL); 4234 values_h = typeArrayHandle(THREAD, r); 4235 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT); 4236 values_h->int_at_put(1, java_lang_Thread::PARKED); 4237 break; 4238 } 4239 case JAVA_THREAD_STATE_TIMED_WAITING : { 4240 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL); 4241 values_h = typeArrayHandle(THREAD, r); 4242 values_h->int_at_put(0, java_lang_Thread::SLEEPING); 4243 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED); 4244 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED); 4245 break; 4246 } 4247 case JAVA_THREAD_STATE_TERMINATED : { 4248 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4249 values_h = typeArrayHandle(THREAD, r); 4250 values_h->int_at_put(0, java_lang_Thread::TERMINATED); 4251 break; 4252 } 4253 default: 4254 // Unknown state - probably incompatible JDK version 4255 return NULL; 4256 } 4257 4258 return (jintArray) JNIHandles::make_local(env, values_h()); 4259} 4260JVM_END 4261 4262 4263JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env, 4264 jint javaThreadState, 4265 jintArray values)) 4266{ 4267 // If new thread states are added in future JDK and VM versions, 4268 // this should check if the JDK version is compatible with thread 4269 // states supported by the VM. Return NULL if not compatible. 4270 // 4271 // This function must map the VM java_lang_Thread::ThreadStatus 4272 // to the Java thread state that the JDK supports. 4273 // 4274 4275 ResourceMark rm; 4276 4277 // Check if threads is null 4278 if (values == NULL) { 4279 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 4280 } 4281 4282 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values)); 4283 typeArrayHandle values_h(THREAD, v); 4284 4285 objArrayHandle names_h; 4286 switch (javaThreadState) { 4287 case JAVA_THREAD_STATE_NEW : { 4288 assert(values_h->length() == 1 && 4289 values_h->int_at(0) == java_lang_Thread::NEW, 4290 "Invalid threadStatus value"); 4291 4292 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4293 1, /* only 1 substate */ 4294 CHECK_NULL); 4295 names_h = objArrayHandle(THREAD, r); 4296 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL); 4297 names_h->obj_at_put(0, name()); 4298 break; 4299 } 4300 case JAVA_THREAD_STATE_RUNNABLE : { 4301 assert(values_h->length() == 1 && 4302 values_h->int_at(0) == java_lang_Thread::RUNNABLE, 4303 "Invalid threadStatus value"); 4304 4305 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4306 1, /* only 1 substate */ 4307 CHECK_NULL); 4308 names_h = objArrayHandle(THREAD, r); 4309 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL); 4310 names_h->obj_at_put(0, name()); 4311 break; 4312 } 4313 case JAVA_THREAD_STATE_BLOCKED : { 4314 assert(values_h->length() == 1 && 4315 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER, 4316 "Invalid threadStatus value"); 4317 4318 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4319 1, /* only 1 substate */ 4320 CHECK_NULL); 4321 names_h = objArrayHandle(THREAD, r); 4322 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL); 4323 names_h->obj_at_put(0, name()); 4324 break; 4325 } 4326 case JAVA_THREAD_STATE_WAITING : { 4327 assert(values_h->length() == 2 && 4328 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT && 4329 values_h->int_at(1) == java_lang_Thread::PARKED, 4330 "Invalid threadStatus value"); 4331 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4332 2, /* number of substates */ 4333 CHECK_NULL); 4334 names_h = objArrayHandle(THREAD, r); 4335 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT", 4336 CHECK_NULL); 4337 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED", 4338 CHECK_NULL); 4339 names_h->obj_at_put(0, name0()); 4340 names_h->obj_at_put(1, name1()); 4341 break; 4342 } 4343 case JAVA_THREAD_STATE_TIMED_WAITING : { 4344 assert(values_h->length() == 3 && 4345 values_h->int_at(0) == java_lang_Thread::SLEEPING && 4346 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED && 4347 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED, 4348 "Invalid threadStatus value"); 4349 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4350 3, /* number of substates */ 4351 CHECK_NULL); 4352 names_h = objArrayHandle(THREAD, r); 4353 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING", 4354 CHECK_NULL); 4355 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT", 4356 CHECK_NULL); 4357 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED", 4358 CHECK_NULL); 4359 names_h->obj_at_put(0, name0()); 4360 names_h->obj_at_put(1, name1()); 4361 names_h->obj_at_put(2, name2()); 4362 break; 4363 } 4364 case JAVA_THREAD_STATE_TERMINATED : { 4365 assert(values_h->length() == 1 && 4366 values_h->int_at(0) == java_lang_Thread::TERMINATED, 4367 "Invalid threadStatus value"); 4368 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4369 1, /* only 1 substate */ 4370 CHECK_NULL); 4371 names_h = objArrayHandle(THREAD, r); 4372 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL); 4373 names_h->obj_at_put(0, name()); 4374 break; 4375 } 4376 default: 4377 // Unknown state - probably incompatible JDK version 4378 return NULL; 4379 } 4380 return (jobjectArray) JNIHandles::make_local(env, names_h()); 4381} 4382JVM_END 4383 4384JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size)) 4385{ 4386 memset(info, 0, info_size); 4387 4388 info->jvm_version = Abstract_VM_Version::jvm_version(); 4389 info->update_version = 0; /* 0 in HotSpot Express VM */ 4390 info->special_update_version = 0; /* 0 in HotSpot Express VM */ 4391 4392 // when we add a new capability in the jvm_version_info struct, we should also 4393 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat 4394 // counter defined in runtimeService.cpp. 4395 info->is_attachable = AttachListener::is_attach_supported(); 4396} 4397JVM_END 4398