jvm.cpp revision 3602:da91efe96a93
1/* 2 * Copyright (c) 1997, 2012, 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 "memory/oopFactory.hpp" 34#include "memory/universe.inline.hpp" 35#include "oops/fieldStreams.hpp" 36#include "oops/instanceKlass.hpp" 37#include "oops/objArrayKlass.hpp" 38#include "oops/method.hpp" 39#include "prims/jvm.h" 40#include "prims/jvm_misc.hpp" 41#include "prims/jvmtiExport.hpp" 42#include "prims/jvmtiThreadState.hpp" 43#include "prims/nativeLookup.hpp" 44#include "prims/privilegedStack.hpp" 45#include "runtime/arguments.hpp" 46#include "runtime/dtraceJSDT.hpp" 47#include "runtime/handles.inline.hpp" 48#include "runtime/init.hpp" 49#include "runtime/interfaceSupport.hpp" 50#include "runtime/java.hpp" 51#include "runtime/javaCalls.hpp" 52#include "runtime/jfieldIDWorkaround.hpp" 53#include "runtime/os.hpp" 54#include "runtime/perfData.hpp" 55#include "runtime/reflection.hpp" 56#include "runtime/vframe.hpp" 57#include "runtime/vm_operations.hpp" 58#include "services/attachListener.hpp" 59#include "services/management.hpp" 60#include "services/threadService.hpp" 61#include "utilities/copy.hpp" 62#include "utilities/defaultStream.hpp" 63#include "utilities/dtrace.hpp" 64#include "utilities/events.hpp" 65#include "utilities/histogram.hpp" 66#include "utilities/top.hpp" 67#include "utilities/utf8.hpp" 68#ifdef TARGET_OS_FAMILY_linux 69# include "jvm_linux.h" 70#endif 71#ifdef TARGET_OS_FAMILY_solaris 72# include "jvm_solaris.h" 73#endif 74#ifdef TARGET_OS_FAMILY_windows 75# include "jvm_windows.h" 76#endif 77#ifdef TARGET_OS_FAMILY_bsd 78# include "jvm_bsd.h" 79#endif 80 81#include <errno.h> 82 83#ifndef USDT2 84HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long); 85HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int); 86HS_DTRACE_PROBE_DECL0(hotspot, thread__yield); 87#endif /* !USDT2 */ 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 Klass* 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 InstanceKlass::cast(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 InstanceKlass::cast(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 InstanceKlass::cast(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 = InstanceKlass::cast(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 = Klass::cast(caller)->external_name(); 194 const char * to = Klass::cast(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 Klass::cast(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// java.lang.Runtime ///////////////////////////////////////////////////////////////////////// 391 392extern volatile jint vm_created; 393 394JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code)) 395 if (vm_created != 0 && (code == 0)) { 396 // The VM is about to exit. We call back into Java to check whether finalizers should be run 397 Universe::run_finalizers_on_exit(); 398 } 399 before_exit(thread); 400 vm_exit(code); 401JVM_END 402 403 404JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code)) 405 before_exit(thread); 406 vm_exit(code); 407JVM_END 408 409 410JVM_LEAF(void, JVM_OnExit(void (*func)(void))) 411 register_on_exit_function(func); 412JVM_END 413 414 415JVM_ENTRY_NO_ENV(void, JVM_GC(void)) 416 JVMWrapper("JVM_GC"); 417 if (!DisableExplicitGC) { 418 Universe::heap()->collect(GCCause::_java_lang_system_gc); 419 } 420JVM_END 421 422 423JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void)) 424 JVMWrapper("JVM_MaxObjectInspectionAge"); 425 return Universe::heap()->millis_since_last_gc(); 426JVM_END 427 428 429JVM_LEAF(void, JVM_TraceInstructions(jboolean on)) 430 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported"); 431JVM_END 432 433 434JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on)) 435 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported"); 436JVM_END 437 438static inline jlong convert_size_t_to_jlong(size_t val) { 439 // In the 64-bit vm, a size_t can overflow a jlong (which is signed). 440 NOT_LP64 (return (jlong)val;) 441 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);) 442} 443 444JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void)) 445 JVMWrapper("JVM_TotalMemory"); 446 size_t n = Universe::heap()->capacity(); 447 return convert_size_t_to_jlong(n); 448JVM_END 449 450 451JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void)) 452 JVMWrapper("JVM_FreeMemory"); 453 CollectedHeap* ch = Universe::heap(); 454 size_t n; 455 { 456 MutexLocker x(Heap_lock); 457 n = ch->capacity() - ch->used(); 458 } 459 return convert_size_t_to_jlong(n); 460JVM_END 461 462 463JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void)) 464 JVMWrapper("JVM_MaxMemory"); 465 size_t n = Universe::heap()->max_capacity(); 466 return convert_size_t_to_jlong(n); 467JVM_END 468 469 470JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void)) 471 JVMWrapper("JVM_ActiveProcessorCount"); 472 return os::active_processor_count(); 473JVM_END 474 475 476 477// java.lang.Throwable ////////////////////////////////////////////////////// 478 479 480JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver)) 481 JVMWrapper("JVM_FillInStackTrace"); 482 Handle exception(thread, JNIHandles::resolve_non_null(receiver)); 483 java_lang_Throwable::fill_in_stack_trace(exception); 484JVM_END 485 486 487JVM_ENTRY(void, JVM_PrintStackTrace(JNIEnv *env, jobject receiver, jobject printable)) 488 JVMWrapper("JVM_PrintStackTrace"); 489 // Note: This is no longer used in Merlin, but we still support it for compatibility. 490 oop exception = JNIHandles::resolve_non_null(receiver); 491 oop stream = JNIHandles::resolve_non_null(printable); 492 java_lang_Throwable::print_stack_trace(exception, stream); 493JVM_END 494 495 496JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable)) 497 JVMWrapper("JVM_GetStackTraceDepth"); 498 oop exception = JNIHandles::resolve(throwable); 499 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD); 500JVM_END 501 502 503JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index)) 504 JVMWrapper("JVM_GetStackTraceElement"); 505 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC 506 oop exception = JNIHandles::resolve(throwable); 507 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL); 508 return JNIHandles::make_local(env, element); 509JVM_END 510 511 512// java.lang.Object /////////////////////////////////////////////// 513 514 515JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle)) 516 JVMWrapper("JVM_IHashCode"); 517 // as implemented in the classic virtual machine; return 0 if object is NULL 518 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ; 519JVM_END 520 521 522JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms)) 523 JVMWrapper("JVM_MonitorWait"); 524 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 525 JavaThreadInObjectWaitState jtiows(thread, ms != 0); 526 if (JvmtiExport::should_post_monitor_wait()) { 527 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms); 528 } 529 ObjectSynchronizer::wait(obj, ms, CHECK); 530JVM_END 531 532 533JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle)) 534 JVMWrapper("JVM_MonitorNotify"); 535 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 536 ObjectSynchronizer::notify(obj, CHECK); 537JVM_END 538 539 540JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle)) 541 JVMWrapper("JVM_MonitorNotifyAll"); 542 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 543 ObjectSynchronizer::notifyall(obj, CHECK); 544JVM_END 545 546 547JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle)) 548 JVMWrapper("JVM_Clone"); 549 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 550 const KlassHandle klass (THREAD, obj->klass()); 551 JvmtiVMObjectAllocEventCollector oam; 552 553#ifdef ASSERT 554 // Just checking that the cloneable flag is set correct 555 if (obj->is_array()) { 556 guarantee(klass->is_cloneable(), "all arrays are cloneable"); 557 } else { 558 guarantee(obj->is_instance(), "should be instanceOop"); 559 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass()); 560 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag"); 561 } 562#endif 563 564 // Check if class of obj supports the Cloneable interface. 565 // All arrays are considered to be cloneable (See JLS 20.1.5) 566 if (!klass->is_cloneable()) { 567 ResourceMark rm(THREAD); 568 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name()); 569 } 570 571 // Make shallow object copy 572 const int size = obj->size(); 573 oop new_obj = NULL; 574 if (obj->is_array()) { 575 const int length = ((arrayOop)obj())->length(); 576 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL); 577 } else { 578 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL); 579 } 580 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread 581 // is modifying a reference field in the clonee, a non-oop-atomic copy might 582 // be suspended in the middle of copying the pointer and end up with parts 583 // of two different pointers in the field. Subsequent dereferences will crash. 584 // 4846409: an oop-copy of objects with long or double fields or arrays of same 585 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead 586 // of oops. We know objects are aligned on a minimum of an jlong boundary. 587 // The same is true of StubRoutines::object_copy and the various oop_copy 588 // variants, and of the code generated by the inline_native_clone intrinsic. 589 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned"); 590 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj, 591 (size_t)align_object_size(size) / HeapWordsPerLong); 592 // Clear the header 593 new_obj->init_mark(); 594 595 // Store check (mark entire object and let gc sort it out) 596 BarrierSet* bs = Universe::heap()->barrier_set(); 597 assert(bs->has_write_region_opt(), "Barrier set does not have write_region"); 598 bs->write_region(MemRegion((HeapWord*)new_obj, size)); 599 600 // Caution: this involves a java upcall, so the clone should be 601 // "gc-robust" by this stage. 602 if (klass->has_finalizer()) { 603 assert(obj->is_instance(), "should be instanceOop"); 604 new_obj = InstanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL); 605 } 606 607 return JNIHandles::make_local(env, oop(new_obj)); 608JVM_END 609 610// java.lang.Compiler //////////////////////////////////////////////////// 611 612// The initial cuts of the HotSpot VM will not support JITs, and all existing 613// JITs would need extensive changes to work with HotSpot. The JIT-related JVM 614// functions are all silently ignored unless JVM warnings are printed. 615 616JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls)) 617 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported"); 618JVM_END 619 620 621JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls)) 622 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported"); 623 return JNI_FALSE; 624JVM_END 625 626 627JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls)) 628 if (PrintJVMWarnings) warning("JVM_CompileClass not supported"); 629 return JNI_FALSE; 630JVM_END 631 632 633JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname)) 634 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported"); 635 return JNI_FALSE; 636JVM_END 637 638 639JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg)) 640 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported"); 641 return NULL; 642JVM_END 643 644 645JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls)) 646 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported"); 647JVM_END 648 649 650JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls)) 651 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported"); 652JVM_END 653 654 655 656// Error message support ////////////////////////////////////////////////////// 657 658JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len)) 659 JVMWrapper("JVM_GetLastErrorString"); 660 return (jint)os::lasterror(buf, len); 661JVM_END 662 663 664// java.io.File /////////////////////////////////////////////////////////////// 665 666JVM_LEAF(char*, JVM_NativePath(char* path)) 667 JVMWrapper2("JVM_NativePath (%s)", path); 668 return os::native_path(path); 669JVM_END 670 671 672// Misc. class handling /////////////////////////////////////////////////////////// 673 674 675JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth)) 676 JVMWrapper("JVM_GetCallerClass"); 677 Klass* k = thread->security_get_caller_class(depth); 678 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); 679JVM_END 680 681 682JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf)) 683 JVMWrapper("JVM_FindPrimitiveClass"); 684 oop mirror = NULL; 685 BasicType t = name2type(utf); 686 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) { 687 mirror = Universe::java_mirror(t); 688 } 689 if (mirror == NULL) { 690 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf); 691 } else { 692 return (jclass) JNIHandles::make_local(env, mirror); 693 } 694JVM_END 695 696 697JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls)) 698 JVMWrapper("JVM_ResolveClass"); 699 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented"); 700JVM_END 701 702 703// Returns a class loaded by the bootstrap class loader; or null 704// if not found. ClassNotFoundException is not thrown. 705// 706// Rationale behind JVM_FindClassFromBootLoader 707// a> JVM_FindClassFromClassLoader was never exported in the export tables. 708// b> because of (a) java.dll has a direct dependecy on the unexported 709// private symbol "_JVM_FindClassFromClassLoader@20". 710// c> the launcher cannot use the private symbol as it dynamically opens 711// the entry point, so if something changes, the launcher will fail 712// unexpectedly at runtime, it is safest for the launcher to dlopen a 713// stable exported interface. 714// d> re-exporting JVM_FindClassFromClassLoader as public, will cause its 715// signature to change from _JVM_FindClassFromClassLoader@20 to 716// JVM_FindClassFromClassLoader and will not be backward compatible 717// with older JDKs. 718// Thus a public/stable exported entry point is the right solution, 719// public here means public in linker semantics, and is exported only 720// to the JDK, and is not intended to be a public API. 721 722JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env, 723 const char* name)) 724 JVMWrapper2("JVM_FindClassFromBootLoader %s", name); 725 726 // Java libraries should ensure that name is never null... 727 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 728 // It's impossible to create this class; the name cannot fit 729 // into the constant pool. 730 return NULL; 731 } 732 733 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); 734 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL); 735 if (k == NULL) { 736 return NULL; 737 } 738 739 if (TraceClassResolution) { 740 trace_class_resolution(k); 741 } 742 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); 743JVM_END 744 745JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name, 746 jboolean init, jobject loader, 747 jboolean throwError)) 748 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name, 749 throwError ? "error" : "exception"); 750 // Java libraries should ensure that name is never null... 751 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 752 // It's impossible to create this class; the name cannot fit 753 // into the constant pool. 754 if (throwError) { 755 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 756 } else { 757 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name); 758 } 759 } 760 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); 761 Handle h_loader(THREAD, JNIHandles::resolve(loader)); 762 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, 763 Handle(), throwError, THREAD); 764 765 if (TraceClassResolution && result != NULL) { 766 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 767 } 768 return result; 769JVM_END 770 771 772JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name, 773 jboolean init, jclass from)) 774 JVMWrapper2("JVM_FindClassFromClass %s", name); 775 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 776 // It's impossible to create this class; the name cannot fit 777 // into the constant pool. 778 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 779 } 780 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); 781 oop from_class_oop = JNIHandles::resolve(from); 782 Klass* from_class = (from_class_oop == NULL) 783 ? (Klass*)NULL 784 : java_lang_Class::as_Klass(from_class_oop); 785 oop class_loader = NULL; 786 oop protection_domain = NULL; 787 if (from_class != NULL) { 788 class_loader = Klass::cast(from_class)->class_loader(); 789 protection_domain = Klass::cast(from_class)->protection_domain(); 790 } 791 Handle h_loader(THREAD, class_loader); 792 Handle h_prot (THREAD, protection_domain); 793 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, 794 h_prot, true, thread); 795 796 if (TraceClassResolution && result != NULL) { 797 // this function is generally only used for class loading during verification. 798 ResourceMark rm; 799 oop from_mirror = JNIHandles::resolve_non_null(from); 800 Klass* from_class = java_lang_Class::as_Klass(from_mirror); 801 const char * from_name = Klass::cast(from_class)->external_name(); 802 803 oop mirror = JNIHandles::resolve_non_null(result); 804 Klass* to_class = java_lang_Class::as_Klass(mirror); 805 const char * to = Klass::cast(to_class)->external_name(); 806 tty->print("RESOLVE %s %s (verification)\n", from_name, to); 807 } 808 809 return result; 810JVM_END 811 812static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) { 813 if (loader.is_null()) { 814 return; 815 } 816 817 // check whether the current caller thread holds the lock or not. 818 // If not, increment the corresponding counter 819 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) != 820 ObjectSynchronizer::owner_self) { 821 counter->inc(); 822 } 823} 824 825// common code for JVM_DefineClass() and JVM_DefineClassWithSource() 826// and JVM_DefineClassWithSourceCond() 827static jclass jvm_define_class_common(JNIEnv *env, const char *name, 828 jobject loader, const jbyte *buf, 829 jsize len, jobject pd, const char *source, 830 jboolean verify, TRAPS) { 831 if (source == NULL) source = "__JVM_DefineClass__"; 832 833 assert(THREAD->is_Java_thread(), "must be a JavaThread"); 834 JavaThread* jt = (JavaThread*) THREAD; 835 836 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(), 837 ClassLoader::perf_define_appclass_selftime(), 838 ClassLoader::perf_define_appclasses(), 839 jt->get_thread_stat()->perf_recursion_counts_addr(), 840 jt->get_thread_stat()->perf_timers_addr(), 841 PerfClassTraceTime::DEFINE_CLASS); 842 843 if (UsePerfData) { 844 ClassLoader::perf_app_classfile_bytes_read()->inc(len); 845 } 846 847 // Since exceptions can be thrown, class initialization can take place 848 // if name is NULL no check for class name in .class stream has to be made. 849 TempNewSymbol class_name = NULL; 850 if (name != NULL) { 851 const int str_len = (int)strlen(name); 852 if (str_len > Symbol::max_length()) { 853 // It's impossible to create this class; the name cannot fit 854 // into the constant pool. 855 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 856 } 857 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL); 858 } 859 860 ResourceMark rm(THREAD); 861 ClassFileStream st((u1*) buf, len, (char *)source); 862 Handle class_loader (THREAD, JNIHandles::resolve(loader)); 863 if (UsePerfData) { 864 is_lock_held_by_thread(class_loader, 865 ClassLoader::sync_JVMDefineClassLockFreeCounter(), 866 THREAD); 867 } 868 Handle protection_domain (THREAD, JNIHandles::resolve(pd)); 869 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader, 870 protection_domain, &st, 871 verify != 0, 872 CHECK_NULL); 873 874 if (TraceClassResolution && k != NULL) { 875 trace_class_resolution(k); 876 } 877 878 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); 879} 880 881 882JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd)) 883 JVMWrapper2("JVM_DefineClass %s", name); 884 885 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD); 886JVM_END 887 888 889JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source)) 890 JVMWrapper2("JVM_DefineClassWithSource %s", name); 891 892 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD); 893JVM_END 894 895JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name, 896 jobject loader, const jbyte *buf, 897 jsize len, jobject pd, 898 const char *source, jboolean verify)) 899 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name); 900 901 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD); 902JVM_END 903 904JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name)) 905 JVMWrapper("JVM_FindLoadedClass"); 906 ResourceMark rm(THREAD); 907 908 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); 909 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL); 910 911 const char* str = java_lang_String::as_utf8_string(string()); 912 // Sanity check, don't expect null 913 if (str == NULL) return NULL; 914 915 const int str_len = (int)strlen(str); 916 if (str_len > Symbol::max_length()) { 917 // It's impossible to create this class; the name cannot fit 918 // into the constant pool. 919 return NULL; 920 } 921 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL); 922 923 // Security Note: 924 // The Java level wrapper will perform the necessary security check allowing 925 // us to pass the NULL as the initiating class loader. 926 Handle h_loader(THREAD, JNIHandles::resolve(loader)); 927 if (UsePerfData) { 928 is_lock_held_by_thread(h_loader, 929 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(), 930 THREAD); 931 } 932 933 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name, 934 h_loader, 935 Handle(), 936 CHECK_NULL); 937 938 return (k == NULL) ? NULL : 939 (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror()); 940JVM_END 941 942 943// Reflection support ////////////////////////////////////////////////////////////////////////////// 944 945JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls)) 946 assert (cls != NULL, "illegal class"); 947 JVMWrapper("JVM_GetClassName"); 948 JvmtiVMObjectAllocEventCollector oam; 949 ResourceMark rm(THREAD); 950 const char* name; 951 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 952 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls))); 953 } else { 954 // Consider caching interned string in Klass 955 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 956 assert(k->is_klass(), "just checking"); 957 name = Klass::cast(k)->external_name(); 958 } 959 oop result = StringTable::intern((char*) name, CHECK_NULL); 960 return (jstring) JNIHandles::make_local(env, result); 961JVM_END 962 963 964JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls)) 965 JVMWrapper("JVM_GetClassInterfaces"); 966 JvmtiVMObjectAllocEventCollector oam; 967 oop mirror = JNIHandles::resolve_non_null(cls); 968 969 // Special handling for primitive objects 970 if (java_lang_Class::is_primitive(mirror)) { 971 // Primitive objects does not have any interfaces 972 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 973 return (jobjectArray) JNIHandles::make_local(env, r); 974 } 975 976 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror)); 977 // Figure size of result array 978 int size; 979 if (klass->oop_is_instance()) { 980 size = InstanceKlass::cast(klass())->local_interfaces()->length(); 981 } else { 982 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass"); 983 size = 2; 984 } 985 986 // Allocate result array 987 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL); 988 objArrayHandle result (THREAD, r); 989 // Fill in result 990 if (klass->oop_is_instance()) { 991 // Regular instance klass, fill in all local interfaces 992 for (int index = 0; index < size; index++) { 993 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index); 994 result->obj_at_put(index, Klass::cast(k)->java_mirror()); 995 } 996 } else { 997 // All arrays implement java.lang.Cloneable and java.io.Serializable 998 result->obj_at_put(0, Klass::cast(SystemDictionary::Cloneable_klass())->java_mirror()); 999 result->obj_at_put(1, Klass::cast(SystemDictionary::Serializable_klass())->java_mirror()); 1000 } 1001 return (jobjectArray) JNIHandles::make_local(env, result()); 1002JVM_END 1003 1004 1005JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls)) 1006 JVMWrapper("JVM_GetClassLoader"); 1007 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1008 return NULL; 1009 } 1010 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1011 oop loader = Klass::cast(k)->class_loader(); 1012 return JNIHandles::make_local(env, loader); 1013JVM_END 1014 1015 1016JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls)) 1017 JVMWrapper("JVM_IsInterface"); 1018 oop mirror = JNIHandles::resolve_non_null(cls); 1019 if (java_lang_Class::is_primitive(mirror)) { 1020 return JNI_FALSE; 1021 } 1022 Klass* k = java_lang_Class::as_Klass(mirror); 1023 jboolean result = Klass::cast(k)->is_interface(); 1024 assert(!result || Klass::cast(k)->oop_is_instance(), 1025 "all interfaces are instance types"); 1026 // The compiler intrinsic for isInterface tests the 1027 // Klass::_access_flags bits in the same way. 1028 return result; 1029JVM_END 1030 1031 1032JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls)) 1033 JVMWrapper("JVM_GetClassSigners"); 1034 JvmtiVMObjectAllocEventCollector oam; 1035 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1036 // There are no signers for primitive types 1037 return NULL; 1038 } 1039 1040 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1041 objArrayOop signers = NULL; 1042 if (Klass::cast(k)->oop_is_instance()) { 1043 signers = InstanceKlass::cast(k)->signers(); 1044 } 1045 1046 // If there are no signers set in the class, or if the class 1047 // is an array, return NULL. 1048 if (signers == NULL) return NULL; 1049 1050 // copy of the signers array 1051 Klass* element = objArrayKlass::cast(signers->klass())->element_klass(); 1052 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL); 1053 for (int index = 0; index < signers->length(); index++) { 1054 signers_copy->obj_at_put(index, signers->obj_at(index)); 1055 } 1056 1057 // return the copy 1058 return (jobjectArray) JNIHandles::make_local(env, signers_copy); 1059JVM_END 1060 1061 1062JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers)) 1063 JVMWrapper("JVM_SetClassSigners"); 1064 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1065 // This call is ignored for primitive types and arrays. 1066 // Signers are only set once, ClassLoader.java, and thus shouldn't 1067 // be called with an array. Only the bootstrap loader creates arrays. 1068 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1069 if (Klass::cast(k)->oop_is_instance()) { 1070 InstanceKlass::cast(k)->set_signers(objArrayOop(JNIHandles::resolve(signers))); 1071 } 1072 } 1073JVM_END 1074 1075 1076JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls)) 1077 JVMWrapper("JVM_GetProtectionDomain"); 1078 if (JNIHandles::resolve(cls) == NULL) { 1079 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); 1080 } 1081 1082 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1083 // Primitive types does not have a protection domain. 1084 return NULL; 1085 } 1086 1087 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1088 return (jobject) JNIHandles::make_local(env, Klass::cast(k)->protection_domain()); 1089JVM_END 1090 1091 1092// Obsolete since 1.2 (Class.setProtectionDomain removed), although 1093// still defined in core libraries as of 1.5. 1094JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain)) 1095 JVMWrapper("JVM_SetProtectionDomain"); 1096 if (JNIHandles::resolve(cls) == NULL) { 1097 THROW(vmSymbols::java_lang_NullPointerException()); 1098 } 1099 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1100 // Call is ignored for primitive types 1101 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1102 1103 // cls won't be an array, as this called only from ClassLoader.defineClass 1104 if (Klass::cast(k)->oop_is_instance()) { 1105 oop pd = JNIHandles::resolve(protection_domain); 1106 assert(pd == NULL || pd->is_oop(), "just checking"); 1107 InstanceKlass::cast(k)->set_protection_domain(pd); 1108 } 1109 } 1110JVM_END 1111 1112 1113JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException)) 1114 JVMWrapper("JVM_DoPrivileged"); 1115 1116 if (action == NULL) { 1117 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action"); 1118 } 1119 1120 // Stack allocated list of privileged stack elements 1121 PrivilegedElement pi; 1122 1123 // Check that action object understands "Object run()" 1124 Handle object (THREAD, JNIHandles::resolve(action)); 1125 1126 // get run() method 1127 Method* m_oop = Klass::cast(object->klass())->uncached_lookup_method( 1128 vmSymbols::run_method_name(), 1129 vmSymbols::void_object_signature()); 1130 methodHandle m (THREAD, m_oop); 1131 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) { 1132 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method"); 1133 } 1134 1135 // Compute the frame initiating the do privileged operation and setup the privileged stack 1136 vframeStream vfst(thread); 1137 vfst.security_get_caller_frame(1); 1138 1139 if (!vfst.at_end()) { 1140 pi.initialize(&vfst, JNIHandles::resolve(context), thread->privileged_stack_top(), CHECK_NULL); 1141 thread->set_privileged_stack_top(&pi); 1142 } 1143 1144 1145 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type 1146 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction 1147 Handle pending_exception; 1148 JavaValue result(T_OBJECT); 1149 JavaCallArguments args(object); 1150 JavaCalls::call(&result, m, &args, THREAD); 1151 1152 // done with action, remove ourselves from the list 1153 if (!vfst.at_end()) { 1154 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element"); 1155 thread->set_privileged_stack_top(thread->privileged_stack_top()->next()); 1156 } 1157 1158 if (HAS_PENDING_EXCEPTION) { 1159 pending_exception = Handle(THREAD, PENDING_EXCEPTION); 1160 CLEAR_PENDING_EXCEPTION; 1161 1162 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) && 1163 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) { 1164 // Throw a java.security.PrivilegedActionException(Exception e) exception 1165 JavaCallArguments args(pending_exception); 1166 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(), 1167 vmSymbols::exception_void_signature(), 1168 &args); 1169 } 1170 } 1171 1172 if (pending_exception.not_null()) THROW_OOP_0(pending_exception()); 1173 return JNIHandles::make_local(env, (oop) result.get_jobject()); 1174JVM_END 1175 1176 1177// Returns the inherited_access_control_context field of the running thread. 1178JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls)) 1179 JVMWrapper("JVM_GetInheritedAccessControlContext"); 1180 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj()); 1181 return JNIHandles::make_local(env, result); 1182JVM_END 1183 1184class RegisterArrayForGC { 1185 private: 1186 JavaThread *_thread; 1187 public: 1188 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) { 1189 _thread = thread; 1190 _thread->register_array_for_gc(array); 1191 } 1192 1193 ~RegisterArrayForGC() { 1194 _thread->register_array_for_gc(NULL); 1195 } 1196}; 1197 1198 1199JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls)) 1200 JVMWrapper("JVM_GetStackAccessControlContext"); 1201 if (!UsePrivilegedStack) return NULL; 1202 1203 ResourceMark rm(THREAD); 1204 GrowableArray<oop>* local_array = new GrowableArray<oop>(12); 1205 JvmtiVMObjectAllocEventCollector oam; 1206 1207 // count the protection domains on the execution stack. We collapse 1208 // duplicate consecutive protection domains into a single one, as 1209 // well as stopping when we hit a privileged frame. 1210 1211 // Use vframeStream to iterate through Java frames 1212 vframeStream vfst(thread); 1213 1214 oop previous_protection_domain = NULL; 1215 Handle privileged_context(thread, NULL); 1216 bool is_privileged = false; 1217 oop protection_domain = NULL; 1218 1219 for(; !vfst.at_end(); vfst.next()) { 1220 // get method of frame 1221 Method* method = vfst.method(); 1222 intptr_t* frame_id = vfst.frame_id(); 1223 1224 // check the privileged frames to see if we have a match 1225 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) { 1226 // this frame is privileged 1227 is_privileged = true; 1228 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context()); 1229 protection_domain = thread->privileged_stack_top()->protection_domain(); 1230 } else { 1231 protection_domain = InstanceKlass::cast(method->method_holder())->protection_domain(); 1232 } 1233 1234 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) { 1235 local_array->push(protection_domain); 1236 previous_protection_domain = protection_domain; 1237 } 1238 1239 if (is_privileged) break; 1240 } 1241 1242 1243 // either all the domains on the stack were system domains, or 1244 // we had a privileged system domain 1245 if (local_array->is_empty()) { 1246 if (is_privileged && privileged_context.is_null()) return NULL; 1247 1248 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL); 1249 return JNIHandles::make_local(env, result); 1250 } 1251 1252 // the resource area must be registered in case of a gc 1253 RegisterArrayForGC ragc(thread, local_array); 1254 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(), 1255 local_array->length(), CHECK_NULL); 1256 objArrayHandle h_context(thread, context); 1257 for (int index = 0; index < local_array->length(); index++) { 1258 h_context->obj_at_put(index, local_array->at(index)); 1259 } 1260 1261 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL); 1262 1263 return JNIHandles::make_local(env, result); 1264JVM_END 1265 1266 1267JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls)) 1268 JVMWrapper("JVM_IsArrayClass"); 1269 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1270 return (k != NULL) && Klass::cast(k)->oop_is_array() ? true : false; 1271JVM_END 1272 1273 1274JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls)) 1275 JVMWrapper("JVM_IsPrimitiveClass"); 1276 oop mirror = JNIHandles::resolve_non_null(cls); 1277 return (jboolean) java_lang_Class::is_primitive(mirror); 1278JVM_END 1279 1280 1281JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls)) 1282 JVMWrapper("JVM_GetComponentType"); 1283 oop mirror = JNIHandles::resolve_non_null(cls); 1284 oop result = Reflection::array_component_type(mirror, CHECK_NULL); 1285 return (jclass) JNIHandles::make_local(env, result); 1286JVM_END 1287 1288 1289JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls)) 1290 JVMWrapper("JVM_GetClassModifiers"); 1291 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1292 // Primitive type 1293 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 1294 } 1295 1296 Klass* k = Klass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls))); 1297 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0)); 1298 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK"); 1299 return k->modifier_flags(); 1300JVM_END 1301 1302 1303// Inner class reflection /////////////////////////////////////////////////////////////////////////////// 1304 1305JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass)) 1306 JvmtiVMObjectAllocEventCollector oam; 1307 // ofClass is a reference to a java_lang_Class object. The mirror object 1308 // of an InstanceKlass 1309 1310 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1311 ! Klass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) { 1312 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1313 return (jobjectArray)JNIHandles::make_local(env, result); 1314 } 1315 1316 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1317 InnerClassesIterator iter(k); 1318 1319 if (iter.length() == 0) { 1320 // Neither an inner nor outer class 1321 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1322 return (jobjectArray)JNIHandles::make_local(env, result); 1323 } 1324 1325 // find inner class info 1326 constantPoolHandle cp(thread, k->constants()); 1327 int length = iter.length(); 1328 1329 // Allocate temp. result array 1330 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL); 1331 objArrayHandle result (THREAD, r); 1332 int members = 0; 1333 1334 for (; !iter.done(); iter.next()) { 1335 int ioff = iter.inner_class_info_index(); 1336 int ooff = iter.outer_class_info_index(); 1337 1338 if (ioff != 0 && ooff != 0) { 1339 // Check to see if the name matches the class we're looking for 1340 // before attempting to find the class. 1341 if (cp->klass_name_at_matches(k, ooff)) { 1342 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL); 1343 if (outer_klass == k()) { 1344 Klass* ik = cp->klass_at(ioff, CHECK_NULL); 1345 instanceKlassHandle inner_klass (THREAD, ik); 1346 1347 // Throws an exception if outer klass has not declared k as 1348 // an inner klass 1349 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL); 1350 1351 result->obj_at_put(members, inner_klass->java_mirror()); 1352 members++; 1353 } 1354 } 1355 } 1356 } 1357 1358 if (members != length) { 1359 // Return array of right length 1360 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL); 1361 for(int i = 0; i < members; i++) { 1362 res->obj_at_put(i, result->obj_at(i)); 1363 } 1364 return (jobjectArray)JNIHandles::make_local(env, res); 1365 } 1366 1367 return (jobjectArray)JNIHandles::make_local(env, result()); 1368JVM_END 1369 1370 1371JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass)) 1372{ 1373 // ofClass is a reference to a java_lang_Class object. 1374 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1375 ! Klass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) { 1376 return NULL; 1377 } 1378 1379 bool inner_is_member = false; 1380 Klass* outer_klass 1381 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)) 1382 )->compute_enclosing_class(&inner_is_member, CHECK_NULL); 1383 if (outer_klass == NULL) return NULL; // already a top-level class 1384 if (!inner_is_member) return NULL; // an anonymous class (inside a method) 1385 return (jclass) JNIHandles::make_local(env, Klass::cast(outer_klass)->java_mirror()); 1386} 1387JVM_END 1388 1389// should be in InstanceKlass.cpp, but is here for historical reasons 1390Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k, 1391 bool* inner_is_member, 1392 TRAPS) { 1393 Thread* thread = THREAD; 1394 InnerClassesIterator iter(k); 1395 if (iter.length() == 0) { 1396 // No inner class info => no declaring class 1397 return NULL; 1398 } 1399 1400 constantPoolHandle i_cp(thread, k->constants()); 1401 1402 bool found = false; 1403 Klass* ok; 1404 instanceKlassHandle outer_klass; 1405 *inner_is_member = false; 1406 1407 // Find inner_klass attribute 1408 for (; !iter.done() && !found; iter.next()) { 1409 int ioff = iter.inner_class_info_index(); 1410 int ooff = iter.outer_class_info_index(); 1411 int noff = iter.inner_name_index(); 1412 if (ioff != 0) { 1413 // Check to see if the name matches the class we're looking for 1414 // before attempting to find the class. 1415 if (i_cp->klass_name_at_matches(k, ioff)) { 1416 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL); 1417 found = (k() == inner_klass); 1418 if (found && ooff != 0) { 1419 ok = i_cp->klass_at(ooff, CHECK_NULL); 1420 outer_klass = instanceKlassHandle(thread, ok); 1421 *inner_is_member = true; 1422 } 1423 } 1424 } 1425 } 1426 1427 if (found && outer_klass.is_null()) { 1428 // It may be anonymous; try for that. 1429 int encl_method_class_idx = k->enclosing_method_class_index(); 1430 if (encl_method_class_idx != 0) { 1431 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL); 1432 outer_klass = instanceKlassHandle(thread, ok); 1433 *inner_is_member = false; 1434 } 1435 } 1436 1437 // If no inner class attribute found for this class. 1438 if (outer_klass.is_null()) return NULL; 1439 1440 // Throws an exception if outer klass has not declared k as an inner klass 1441 // We need evidence that each klass knows about the other, or else 1442 // the system could allow a spoof of an inner class to gain access rights. 1443 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL); 1444 return outer_klass(); 1445} 1446 1447JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls)) 1448 assert (cls != NULL, "illegal class"); 1449 JVMWrapper("JVM_GetClassSignature"); 1450 JvmtiVMObjectAllocEventCollector oam; 1451 ResourceMark rm(THREAD); 1452 // Return null for arrays and primatives 1453 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1454 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1455 if (Klass::cast(k)->oop_is_instance()) { 1456 Symbol* sym = InstanceKlass::cast(k)->generic_signature(); 1457 if (sym == NULL) return NULL; 1458 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 1459 return (jstring) JNIHandles::make_local(env, str()); 1460 } 1461 } 1462 return NULL; 1463JVM_END 1464 1465 1466JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls)) 1467 assert (cls != NULL, "illegal class"); 1468 JVMWrapper("JVM_GetClassAnnotations"); 1469 ResourceMark rm(THREAD); 1470 // Return null for arrays and primitives 1471 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1472 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1473 if (Klass::cast(k)->oop_is_instance()) { 1474 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL); 1475 return (jbyteArray) JNIHandles::make_local(env, a); 1476 } 1477 } 1478 return NULL; 1479JVM_END 1480 1481 1482JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field)) 1483 assert(field != NULL, "illegal field"); 1484 JVMWrapper("JVM_GetFieldAnnotations"); 1485 1486 // some of this code was adapted from from jni_FromReflectedField 1487 1488 // field is a handle to a java.lang.reflect.Field object 1489 oop reflected = JNIHandles::resolve_non_null(field); 1490 oop mirror = java_lang_reflect_Field::clazz(reflected); 1491 Klass* k = java_lang_Class::as_Klass(mirror); 1492 int slot = java_lang_reflect_Field::slot(reflected); 1493 int modifiers = java_lang_reflect_Field::modifiers(reflected); 1494 1495 fieldDescriptor fd; 1496 KlassHandle kh(THREAD, k); 1497 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot); 1498 1499 if (modifiers & JVM_ACC_STATIC) { 1500 // for static fields we only look in the current class 1501 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) { 1502 assert(false, "cannot find static field"); 1503 return NULL; // robustness 1504 } 1505 } else { 1506 // for instance fields we start with the current class and work 1507 // our way up through the superclass chain 1508 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) { 1509 assert(false, "cannot find instance field"); 1510 return NULL; // robustness 1511 } 1512 } 1513 1514 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD)); 1515JVM_END 1516 1517 1518static Method* jvm_get_method_common(jobject method, TRAPS) { 1519 // some of this code was adapted from from jni_FromReflectedMethod 1520 1521 oop reflected = JNIHandles::resolve_non_null(method); 1522 oop mirror = NULL; 1523 int slot = 0; 1524 1525 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 1526 mirror = java_lang_reflect_Constructor::clazz(reflected); 1527 slot = java_lang_reflect_Constructor::slot(reflected); 1528 } else { 1529 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), 1530 "wrong type"); 1531 mirror = java_lang_reflect_Method::clazz(reflected); 1532 slot = java_lang_reflect_Method::slot(reflected); 1533 } 1534 Klass* k = java_lang_Class::as_Klass(mirror); 1535 1536 KlassHandle kh(THREAD, k); 1537 Method* m = InstanceKlass::cast(kh())->method_with_idnum(slot); 1538 if (m == NULL) { 1539 assert(false, "cannot find method"); 1540 return NULL; // robustness 1541 } 1542 1543 return m; 1544} 1545 1546 1547JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method)) 1548 JVMWrapper("JVM_GetMethodAnnotations"); 1549 1550 // method is a handle to a java.lang.reflect.Method object 1551 Method* m = jvm_get_method_common(method, CHECK_NULL); 1552 return (jbyteArray) JNIHandles::make_local(env, 1553 Annotations::make_java_array(m->annotations(), THREAD)); 1554JVM_END 1555 1556 1557JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method)) 1558 JVMWrapper("JVM_GetMethodDefaultAnnotationValue"); 1559 1560 // method is a handle to a java.lang.reflect.Method object 1561 Method* m = jvm_get_method_common(method, CHECK_NULL); 1562 return (jbyteArray) JNIHandles::make_local(env, 1563 Annotations::make_java_array(m->annotation_default(), THREAD)); 1564JVM_END 1565 1566 1567JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method)) 1568 JVMWrapper("JVM_GetMethodParameterAnnotations"); 1569 1570 // method is a handle to a java.lang.reflect.Method object 1571 Method* m = jvm_get_method_common(method, CHECK_NULL); 1572 return (jbyteArray) JNIHandles::make_local(env, 1573 Annotations::make_java_array(m->parameter_annotations(), THREAD)); 1574JVM_END 1575 1576 1577// New (JDK 1.4) reflection implementation ///////////////////////////////////// 1578 1579JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1580{ 1581 JVMWrapper("JVM_GetClassDeclaredFields"); 1582 JvmtiVMObjectAllocEventCollector oam; 1583 1584 // Exclude primitive types and array types 1585 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1586 Klass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)))->oop_is_array()) { 1587 // Return empty array 1588 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL); 1589 return (jobjectArray) JNIHandles::make_local(env, res); 1590 } 1591 1592 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1593 constantPoolHandle cp(THREAD, k->constants()); 1594 1595 // Ensure class is linked 1596 k->link_class(CHECK_NULL); 1597 1598 // 4496456 We need to filter out java.lang.Throwable.backtrace 1599 bool skip_backtrace = false; 1600 1601 // Allocate result 1602 int num_fields; 1603 1604 if (publicOnly) { 1605 num_fields = 0; 1606 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) { 1607 if (fs.access_flags().is_public()) ++num_fields; 1608 } 1609 } else { 1610 num_fields = k->java_fields_count(); 1611 1612 if (k() == SystemDictionary::Throwable_klass()) { 1613 num_fields--; 1614 skip_backtrace = true; 1615 } 1616 } 1617 1618 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL); 1619 objArrayHandle result (THREAD, r); 1620 1621 int out_idx = 0; 1622 fieldDescriptor fd; 1623 for (JavaFieldStream fs(k); !fs.done(); fs.next()) { 1624 if (skip_backtrace) { 1625 // 4496456 skip java.lang.Throwable.backtrace 1626 int offset = fs.offset(); 1627 if (offset == java_lang_Throwable::get_backtrace_offset()) continue; 1628 } 1629 1630 if (!publicOnly || fs.access_flags().is_public()) { 1631 fd.initialize(k(), fs.index()); 1632 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL); 1633 result->obj_at_put(out_idx, field); 1634 ++out_idx; 1635 } 1636 } 1637 assert(out_idx == num_fields, "just checking"); 1638 return (jobjectArray) JNIHandles::make_local(env, result()); 1639} 1640JVM_END 1641 1642JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1643{ 1644 JVMWrapper("JVM_GetClassDeclaredMethods"); 1645 JvmtiVMObjectAllocEventCollector oam; 1646 1647 // Exclude primitive types and array types 1648 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) 1649 || Klass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)))->oop_is_array()) { 1650 // Return empty array 1651 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), 0, CHECK_NULL); 1652 return (jobjectArray) JNIHandles::make_local(env, res); 1653 } 1654 1655 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1656 1657 // Ensure class is linked 1658 k->link_class(CHECK_NULL); 1659 1660 Array<Method*>* methods = k->methods(); 1661 int methods_length = methods->length(); 1662 int num_methods = 0; 1663 1664 int i; 1665 for (i = 0; i < methods_length; i++) { 1666 methodHandle method(THREAD, methods->at(i)); 1667 if (!method->is_initializer()) { 1668 if (!publicOnly || method->is_public()) { 1669 ++num_methods; 1670 } 1671 } 1672 } 1673 1674 // Allocate result 1675 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), num_methods, CHECK_NULL); 1676 objArrayHandle result (THREAD, r); 1677 1678 int out_idx = 0; 1679 for (i = 0; i < methods_length; i++) { 1680 methodHandle method(THREAD, methods->at(i)); 1681 if (!method->is_initializer()) { 1682 if (!publicOnly || method->is_public()) { 1683 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL); 1684 result->obj_at_put(out_idx, m); 1685 ++out_idx; 1686 } 1687 } 1688 } 1689 assert(out_idx == num_methods, "just checking"); 1690 return (jobjectArray) JNIHandles::make_local(env, result()); 1691} 1692JVM_END 1693 1694JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1695{ 1696 JVMWrapper("JVM_GetClassDeclaredConstructors"); 1697 JvmtiVMObjectAllocEventCollector oam; 1698 1699 // Exclude primitive types and array types 1700 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) 1701 || Klass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)))->oop_is_array()) { 1702 // Return empty array 1703 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0 , CHECK_NULL); 1704 return (jobjectArray) JNIHandles::make_local(env, res); 1705 } 1706 1707 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1708 1709 // Ensure class is linked 1710 k->link_class(CHECK_NULL); 1711 1712 Array<Method*>* methods = k->methods(); 1713 int methods_length = methods->length(); 1714 int num_constructors = 0; 1715 1716 int i; 1717 for (i = 0; i < methods_length; i++) { 1718 methodHandle method(THREAD, methods->at(i)); 1719 if (method->is_initializer() && !method->is_static()) { 1720 if (!publicOnly || method->is_public()) { 1721 ++num_constructors; 1722 } 1723 } 1724 } 1725 1726 // Allocate result 1727 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), num_constructors, CHECK_NULL); 1728 objArrayHandle result(THREAD, r); 1729 1730 int out_idx = 0; 1731 for (i = 0; i < methods_length; i++) { 1732 methodHandle method(THREAD, methods->at(i)); 1733 if (method->is_initializer() && !method->is_static()) { 1734 if (!publicOnly || method->is_public()) { 1735 oop m = Reflection::new_constructor(method, CHECK_NULL); 1736 result->obj_at_put(out_idx, m); 1737 ++out_idx; 1738 } 1739 } 1740 } 1741 assert(out_idx == num_constructors, "just checking"); 1742 return (jobjectArray) JNIHandles::make_local(env, result()); 1743} 1744JVM_END 1745 1746JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls)) 1747{ 1748 JVMWrapper("JVM_GetClassAccessFlags"); 1749 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1750 // Primitive type 1751 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 1752 } 1753 1754 Klass* k = Klass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls))); 1755 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS; 1756} 1757JVM_END 1758 1759 1760// Constant pool access ////////////////////////////////////////////////////////// 1761 1762JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls)) 1763{ 1764 JVMWrapper("JVM_GetClassConstantPool"); 1765 JvmtiVMObjectAllocEventCollector oam; 1766 1767 // Return null for primitives and arrays 1768 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1769 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1770 if (Klass::cast(k)->oop_is_instance()) { 1771 instanceKlassHandle k_h(THREAD, k); 1772 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL); 1773 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants()); 1774 return JNIHandles::make_local(jcp()); 1775 } 1776 } 1777 return NULL; 1778} 1779JVM_END 1780 1781 1782JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused)) 1783{ 1784 JVMWrapper("JVM_ConstantPoolGetSize"); 1785 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 1786 return cp->length(); 1787} 1788JVM_END 1789 1790 1791static void bounds_check(constantPoolHandle cp, jint index, TRAPS) { 1792 if (!cp->is_within_bounds(index)) { 1793 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds"); 1794 } 1795} 1796 1797 1798JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 1799{ 1800 JVMWrapper("JVM_ConstantPoolGetClassAt"); 1801 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 1802 bounds_check(cp, index, CHECK_NULL); 1803 constantTag tag = cp->tag_at(index); 1804 if (!tag.is_klass() && !tag.is_unresolved_klass()) { 1805 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1806 } 1807 Klass* k = cp->klass_at(index, CHECK_NULL); 1808 return (jclass) JNIHandles::make_local(k->java_mirror()); 1809} 1810JVM_END 1811 1812 1813JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) 1814{ 1815 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded"); 1816 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 1817 bounds_check(cp, index, CHECK_NULL); 1818 constantTag tag = cp->tag_at(index); 1819 if (!tag.is_klass() && !tag.is_unresolved_klass()) { 1820 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1821 } 1822 Klass* k = ConstantPool::klass_at_if_loaded(cp, index); 1823 if (k == NULL) return NULL; 1824 return (jclass) JNIHandles::make_local(k->java_mirror()); 1825} 1826JVM_END 1827 1828static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { 1829 constantTag tag = cp->tag_at(index); 1830 if (!tag.is_method() && !tag.is_interface_method()) { 1831 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1832 } 1833 int klass_ref = cp->uncached_klass_ref_index_at(index); 1834 Klass* k_o; 1835 if (force_resolution) { 1836 k_o = cp->klass_at(klass_ref, CHECK_NULL); 1837 } else { 1838 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref); 1839 if (k_o == NULL) return NULL; 1840 } 1841 instanceKlassHandle k(THREAD, k_o); 1842 Symbol* name = cp->uncached_name_ref_at(index); 1843 Symbol* sig = cp->uncached_signature_ref_at(index); 1844 methodHandle m (THREAD, k->find_method(name, sig)); 1845 if (m.is_null()) { 1846 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class"); 1847 } 1848 oop method; 1849 if (!m->is_initializer() || m->is_static()) { 1850 method = Reflection::new_method(m, true, true, CHECK_NULL); 1851 } else { 1852 method = Reflection::new_constructor(m, CHECK_NULL); 1853 } 1854 return JNIHandles::make_local(method); 1855} 1856 1857JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 1858{ 1859 JVMWrapper("JVM_ConstantPoolGetMethodAt"); 1860 JvmtiVMObjectAllocEventCollector oam; 1861 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 1862 bounds_check(cp, index, CHECK_NULL); 1863 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL); 1864 return res; 1865} 1866JVM_END 1867 1868JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) 1869{ 1870 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded"); 1871 JvmtiVMObjectAllocEventCollector oam; 1872 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 1873 bounds_check(cp, index, CHECK_NULL); 1874 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL); 1875 return res; 1876} 1877JVM_END 1878 1879static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { 1880 constantTag tag = cp->tag_at(index); 1881 if (!tag.is_field()) { 1882 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1883 } 1884 int klass_ref = cp->uncached_klass_ref_index_at(index); 1885 Klass* k_o; 1886 if (force_resolution) { 1887 k_o = cp->klass_at(klass_ref, CHECK_NULL); 1888 } else { 1889 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref); 1890 if (k_o == NULL) return NULL; 1891 } 1892 instanceKlassHandle k(THREAD, k_o); 1893 Symbol* name = cp->uncached_name_ref_at(index); 1894 Symbol* sig = cp->uncached_signature_ref_at(index); 1895 fieldDescriptor fd; 1896 Klass* target_klass = k->find_field(name, sig, &fd); 1897 if (target_klass == NULL) { 1898 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class"); 1899 } 1900 oop field = Reflection::new_field(&fd, true, CHECK_NULL); 1901 return JNIHandles::make_local(field); 1902} 1903 1904JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index)) 1905{ 1906 JVMWrapper("JVM_ConstantPoolGetFieldAt"); 1907 JvmtiVMObjectAllocEventCollector oam; 1908 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 1909 bounds_check(cp, index, CHECK_NULL); 1910 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL); 1911 return res; 1912} 1913JVM_END 1914 1915JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) 1916{ 1917 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded"); 1918 JvmtiVMObjectAllocEventCollector oam; 1919 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 1920 bounds_check(cp, index, CHECK_NULL); 1921 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL); 1922 return res; 1923} 1924JVM_END 1925 1926JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 1927{ 1928 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt"); 1929 JvmtiVMObjectAllocEventCollector oam; 1930 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 1931 bounds_check(cp, index, CHECK_NULL); 1932 constantTag tag = cp->tag_at(index); 1933 if (!tag.is_field_or_method()) { 1934 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1935 } 1936 int klass_ref = cp->uncached_klass_ref_index_at(index); 1937 Symbol* klass_name = cp->klass_name_at(klass_ref); 1938 Symbol* member_name = cp->uncached_name_ref_at(index); 1939 Symbol* member_sig = cp->uncached_signature_ref_at(index); 1940 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL); 1941 objArrayHandle dest(THREAD, dest_o); 1942 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL); 1943 dest->obj_at_put(0, str()); 1944 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL); 1945 dest->obj_at_put(1, str()); 1946 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL); 1947 dest->obj_at_put(2, str()); 1948 return (jobjectArray) JNIHandles::make_local(dest()); 1949} 1950JVM_END 1951 1952JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 1953{ 1954 JVMWrapper("JVM_ConstantPoolGetIntAt"); 1955 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 1956 bounds_check(cp, index, CHECK_0); 1957 constantTag tag = cp->tag_at(index); 1958 if (!tag.is_int()) { 1959 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1960 } 1961 return cp->int_at(index); 1962} 1963JVM_END 1964 1965JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 1966{ 1967 JVMWrapper("JVM_ConstantPoolGetLongAt"); 1968 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 1969 bounds_check(cp, index, CHECK_(0L)); 1970 constantTag tag = cp->tag_at(index); 1971 if (!tag.is_long()) { 1972 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1973 } 1974 return cp->long_at(index); 1975} 1976JVM_END 1977 1978JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 1979{ 1980 JVMWrapper("JVM_ConstantPoolGetFloatAt"); 1981 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 1982 bounds_check(cp, index, CHECK_(0.0f)); 1983 constantTag tag = cp->tag_at(index); 1984 if (!tag.is_float()) { 1985 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1986 } 1987 return cp->float_at(index); 1988} 1989JVM_END 1990 1991JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 1992{ 1993 JVMWrapper("JVM_ConstantPoolGetDoubleAt"); 1994 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 1995 bounds_check(cp, index, CHECK_(0.0)); 1996 constantTag tag = cp->tag_at(index); 1997 if (!tag.is_double()) { 1998 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1999 } 2000 return cp->double_at(index); 2001} 2002JVM_END 2003 2004JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2005{ 2006 JVMWrapper("JVM_ConstantPoolGetStringAt"); 2007 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2008 bounds_check(cp, index, CHECK_NULL); 2009 constantTag tag = cp->tag_at(index); 2010 if (!tag.is_string()) { 2011 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2012 } 2013 oop str = cp->string_at(index, CHECK_NULL); 2014 return (jstring) JNIHandles::make_local(str); 2015} 2016JVM_END 2017 2018JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index)) 2019{ 2020 JVMWrapper("JVM_ConstantPoolGetUTF8At"); 2021 JvmtiVMObjectAllocEventCollector oam; 2022 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2023 bounds_check(cp, index, CHECK_NULL); 2024 constantTag tag = cp->tag_at(index); 2025 if (!tag.is_symbol()) { 2026 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2027 } 2028 Symbol* sym = cp->symbol_at(index); 2029 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 2030 return (jstring) JNIHandles::make_local(str()); 2031} 2032JVM_END 2033 2034 2035// Assertion support. ////////////////////////////////////////////////////////// 2036 2037JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls)) 2038 JVMWrapper("JVM_DesiredAssertionStatus"); 2039 assert(cls != NULL, "bad class"); 2040 2041 oop r = JNIHandles::resolve(cls); 2042 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed"); 2043 if (java_lang_Class::is_primitive(r)) return false; 2044 2045 Klass* k = java_lang_Class::as_Klass(r); 2046 assert(Klass::cast(k)->oop_is_instance(), "must be an instance klass"); 2047 if (! Klass::cast(k)->oop_is_instance()) return false; 2048 2049 ResourceMark rm(THREAD); 2050 const char* name = Klass::cast(k)->name()->as_C_string(); 2051 bool system_class = Klass::cast(k)->class_loader() == NULL; 2052 return JavaAssertions::enabled(name, system_class); 2053 2054JVM_END 2055 2056 2057// Return a new AssertionStatusDirectives object with the fields filled in with 2058// command-line assertion arguments (i.e., -ea, -da). 2059JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused)) 2060 JVMWrapper("JVM_AssertionStatusDirectives"); 2061 JvmtiVMObjectAllocEventCollector oam; 2062 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL); 2063 return JNIHandles::make_local(env, asd); 2064JVM_END 2065 2066// Verification //////////////////////////////////////////////////////////////////////////////// 2067 2068// Reflection for the verifier ///////////////////////////////////////////////////////////////// 2069 2070// RedefineClasses support: bug 6214132 caused verification to fail. 2071// All functions from this section should call the jvmtiThreadSate function: 2072// Klass* class_to_verify_considering_redefinition(Klass* klass). 2073// The function returns a Klass* of the _scratch_class if the verifier 2074// was invoked in the middle of the class redefinition. 2075// Otherwise it returns its argument value which is the _the_class Klass*. 2076// Please, refer to the description in the jvmtiThreadSate.hpp. 2077 2078JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls)) 2079 JVMWrapper("JVM_GetClassNameUTF"); 2080 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2081 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2082 return Klass::cast(k)->name()->as_utf8(); 2083JVM_END 2084 2085 2086JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types)) 2087 JVMWrapper("JVM_GetClassCPTypes"); 2088 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2089 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2090 // types will have length zero if this is not an InstanceKlass 2091 // (length is determined by call to JVM_GetClassCPEntriesCount) 2092 if (Klass::cast(k)->oop_is_instance()) { 2093 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2094 for (int index = cp->length() - 1; index >= 0; index--) { 2095 constantTag tag = cp->tag_at(index); 2096 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value(); 2097 } 2098 } 2099JVM_END 2100 2101 2102JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls)) 2103 JVMWrapper("JVM_GetClassCPEntriesCount"); 2104 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2105 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2106 if (!Klass::cast(k)->oop_is_instance()) 2107 return 0; 2108 return InstanceKlass::cast(k)->constants()->length(); 2109JVM_END 2110 2111 2112JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls)) 2113 JVMWrapper("JVM_GetClassFieldsCount"); 2114 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2115 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2116 if (!Klass::cast(k)->oop_is_instance()) 2117 return 0; 2118 return InstanceKlass::cast(k)->java_fields_count(); 2119JVM_END 2120 2121 2122JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls)) 2123 JVMWrapper("JVM_GetClassMethodsCount"); 2124 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2125 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2126 if (!Klass::cast(k)->oop_is_instance()) 2127 return 0; 2128 return InstanceKlass::cast(k)->methods()->length(); 2129JVM_END 2130 2131 2132// The following methods, used for the verifier, are never called with 2133// array klasses, so a direct cast to InstanceKlass is safe. 2134// Typically, these methods are called in a loop with bounds determined 2135// by the results of JVM_GetClass{Fields,Methods}Count, which return 2136// zero for arrays. 2137JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions)) 2138 JVMWrapper("JVM_GetMethodIxExceptionIndexes"); 2139 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2140 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2141 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2142 int length = method->checked_exceptions_length(); 2143 if (length > 0) { 2144 CheckedExceptionElement* table= method->checked_exceptions_start(); 2145 for (int i = 0; i < length; i++) { 2146 exceptions[i] = table[i].class_cp_index; 2147 } 2148 } 2149JVM_END 2150 2151 2152JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index)) 2153 JVMWrapper("JVM_GetMethodIxExceptionsCount"); 2154 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2155 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2156 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2157 return method->checked_exceptions_length(); 2158JVM_END 2159 2160 2161JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code)) 2162 JVMWrapper("JVM_GetMethodIxByteCode"); 2163 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2164 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2165 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2166 memcpy(code, method->code_base(), method->code_size()); 2167JVM_END 2168 2169 2170JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index)) 2171 JVMWrapper("JVM_GetMethodIxByteCodeLength"); 2172 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2173 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2174 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2175 return method->code_size(); 2176JVM_END 2177 2178 2179JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry)) 2180 JVMWrapper("JVM_GetMethodIxExceptionTableEntry"); 2181 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2182 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2183 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2184 ExceptionTable extable(method); 2185 entry->start_pc = extable.start_pc(entry_index); 2186 entry->end_pc = extable.end_pc(entry_index); 2187 entry->handler_pc = extable.handler_pc(entry_index); 2188 entry->catchType = extable.catch_type_index(entry_index); 2189JVM_END 2190 2191 2192JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index)) 2193 JVMWrapper("JVM_GetMethodIxExceptionTableLength"); 2194 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2195 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2196 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2197 return method->exception_table_length(); 2198JVM_END 2199 2200 2201JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index)) 2202 JVMWrapper("JVM_GetMethodIxModifiers"); 2203 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2204 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2205 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2206 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2207JVM_END 2208 2209 2210JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index)) 2211 JVMWrapper("JVM_GetFieldIxModifiers"); 2212 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2213 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2214 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS; 2215JVM_END 2216 2217 2218JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index)) 2219 JVMWrapper("JVM_GetMethodIxLocalsCount"); 2220 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2221 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2222 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2223 return method->max_locals(); 2224JVM_END 2225 2226 2227JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index)) 2228 JVMWrapper("JVM_GetMethodIxArgsSize"); 2229 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2230 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2231 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2232 return method->size_of_parameters(); 2233JVM_END 2234 2235 2236JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index)) 2237 JVMWrapper("JVM_GetMethodIxMaxStack"); 2238 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2239 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2240 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2241 return method->verifier_max_stack(); 2242JVM_END 2243 2244 2245JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index)) 2246 JVMWrapper("JVM_IsConstructorIx"); 2247 ResourceMark rm(THREAD); 2248 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2249 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2250 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2251 return method->name() == vmSymbols::object_initializer_name(); 2252JVM_END 2253 2254 2255JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index)) 2256 JVMWrapper("JVM_GetMethodIxIxUTF"); 2257 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2258 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2259 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2260 return method->name()->as_utf8(); 2261JVM_END 2262 2263 2264JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index)) 2265 JVMWrapper("JVM_GetMethodIxSignatureUTF"); 2266 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2267 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2268 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2269 return method->signature()->as_utf8(); 2270JVM_END 2271 2272/** 2273 * All of these JVM_GetCP-xxx methods are used by the old verifier to 2274 * read entries in the constant pool. Since the old verifier always 2275 * works on a copy of the code, it will not see any rewriting that 2276 * may possibly occur in the middle of verification. So it is important 2277 * that nothing it calls tries to use the cpCache instead of the raw 2278 * constant pool, so we must use cp->uncached_x methods when appropriate. 2279 */ 2280JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2281 JVMWrapper("JVM_GetCPFieldNameUTF"); 2282 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2283 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2284 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2285 switch (cp->tag_at(cp_index).value()) { 2286 case JVM_CONSTANT_Fieldref: 2287 return cp->uncached_name_ref_at(cp_index)->as_utf8(); 2288 default: 2289 fatal("JVM_GetCPFieldNameUTF: illegal constant"); 2290 } 2291 ShouldNotReachHere(); 2292 return NULL; 2293JVM_END 2294 2295 2296JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2297 JVMWrapper("JVM_GetCPMethodNameUTF"); 2298 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2299 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2300 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2301 switch (cp->tag_at(cp_index).value()) { 2302 case JVM_CONSTANT_InterfaceMethodref: 2303 case JVM_CONSTANT_Methodref: 2304 case JVM_CONSTANT_NameAndType: // for invokedynamic 2305 return cp->uncached_name_ref_at(cp_index)->as_utf8(); 2306 default: 2307 fatal("JVM_GetCPMethodNameUTF: illegal constant"); 2308 } 2309 ShouldNotReachHere(); 2310 return NULL; 2311JVM_END 2312 2313 2314JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) 2315 JVMWrapper("JVM_GetCPMethodSignatureUTF"); 2316 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2317 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2318 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2319 switch (cp->tag_at(cp_index).value()) { 2320 case JVM_CONSTANT_InterfaceMethodref: 2321 case JVM_CONSTANT_Methodref: 2322 case JVM_CONSTANT_NameAndType: // for invokedynamic 2323 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); 2324 default: 2325 fatal("JVM_GetCPMethodSignatureUTF: illegal constant"); 2326 } 2327 ShouldNotReachHere(); 2328 return NULL; 2329JVM_END 2330 2331 2332JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) 2333 JVMWrapper("JVM_GetCPFieldSignatureUTF"); 2334 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2335 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2336 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2337 switch (cp->tag_at(cp_index).value()) { 2338 case JVM_CONSTANT_Fieldref: 2339 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); 2340 default: 2341 fatal("JVM_GetCPFieldSignatureUTF: illegal constant"); 2342 } 2343 ShouldNotReachHere(); 2344 return NULL; 2345JVM_END 2346 2347 2348JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2349 JVMWrapper("JVM_GetCPClassNameUTF"); 2350 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2351 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2352 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2353 Symbol* classname = cp->klass_name_at(cp_index); 2354 return classname->as_utf8(); 2355JVM_END 2356 2357 2358JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2359 JVMWrapper("JVM_GetCPFieldClassNameUTF"); 2360 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2361 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2362 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2363 switch (cp->tag_at(cp_index).value()) { 2364 case JVM_CONSTANT_Fieldref: { 2365 int class_index = cp->uncached_klass_ref_index_at(cp_index); 2366 Symbol* classname = cp->klass_name_at(class_index); 2367 return classname->as_utf8(); 2368 } 2369 default: 2370 fatal("JVM_GetCPFieldClassNameUTF: illegal constant"); 2371 } 2372 ShouldNotReachHere(); 2373 return NULL; 2374JVM_END 2375 2376 2377JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2378 JVMWrapper("JVM_GetCPMethodClassNameUTF"); 2379 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2380 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2381 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2382 switch (cp->tag_at(cp_index).value()) { 2383 case JVM_CONSTANT_Methodref: 2384 case JVM_CONSTANT_InterfaceMethodref: { 2385 int class_index = cp->uncached_klass_ref_index_at(cp_index); 2386 Symbol* classname = cp->klass_name_at(class_index); 2387 return classname->as_utf8(); 2388 } 2389 default: 2390 fatal("JVM_GetCPMethodClassNameUTF: illegal constant"); 2391 } 2392 ShouldNotReachHere(); 2393 return NULL; 2394JVM_END 2395 2396 2397JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) 2398 JVMWrapper("JVM_GetCPFieldModifiers"); 2399 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2400 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls)); 2401 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2402 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); 2403 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2404 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants(); 2405 switch (cp->tag_at(cp_index).value()) { 2406 case JVM_CONSTANT_Fieldref: { 2407 Symbol* name = cp->uncached_name_ref_at(cp_index); 2408 Symbol* signature = cp->uncached_signature_ref_at(cp_index); 2409 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) { 2410 if (fs.name() == name && fs.signature() == signature) { 2411 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS; 2412 } 2413 } 2414 return -1; 2415 } 2416 default: 2417 fatal("JVM_GetCPFieldModifiers: illegal constant"); 2418 } 2419 ShouldNotReachHere(); 2420 return 0; 2421JVM_END 2422 2423 2424JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) 2425 JVMWrapper("JVM_GetCPMethodModifiers"); 2426 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2427 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls)); 2428 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2429 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); 2430 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2431 switch (cp->tag_at(cp_index).value()) { 2432 case JVM_CONSTANT_Methodref: 2433 case JVM_CONSTANT_InterfaceMethodref: { 2434 Symbol* name = cp->uncached_name_ref_at(cp_index); 2435 Symbol* signature = cp->uncached_signature_ref_at(cp_index); 2436 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods(); 2437 int methods_count = methods->length(); 2438 for (int i = 0; i < methods_count; i++) { 2439 Method* method = methods->at(i); 2440 if (method->name() == name && method->signature() == signature) { 2441 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2442 } 2443 } 2444 return -1; 2445 } 2446 default: 2447 fatal("JVM_GetCPMethodModifiers: illegal constant"); 2448 } 2449 ShouldNotReachHere(); 2450 return 0; 2451JVM_END 2452 2453 2454// Misc ////////////////////////////////////////////////////////////////////////////////////////////// 2455 2456JVM_LEAF(void, JVM_ReleaseUTF(const char *utf)) 2457 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything 2458JVM_END 2459 2460 2461JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2)) 2462 JVMWrapper("JVM_IsSameClassPackage"); 2463 oop class1_mirror = JNIHandles::resolve_non_null(class1); 2464 oop class2_mirror = JNIHandles::resolve_non_null(class2); 2465 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror); 2466 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror); 2467 return (jboolean) Reflection::is_same_class_package(klass1, klass2); 2468JVM_END 2469 2470 2471// IO functions //////////////////////////////////////////////////////////////////////////////////////// 2472 2473JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode)) 2474 JVMWrapper2("JVM_Open (%s)", fname); 2475 2476 //%note jvm_r6 2477 int result = os::open(fname, flags, mode); 2478 if (result >= 0) { 2479 return result; 2480 } else { 2481 switch(errno) { 2482 case EEXIST: 2483 return JVM_EEXIST; 2484 default: 2485 return -1; 2486 } 2487 } 2488JVM_END 2489 2490 2491JVM_LEAF(jint, JVM_Close(jint fd)) 2492 JVMWrapper2("JVM_Close (0x%x)", fd); 2493 //%note jvm_r6 2494 return os::close(fd); 2495JVM_END 2496 2497 2498JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes)) 2499 JVMWrapper2("JVM_Read (0x%x)", fd); 2500 2501 //%note jvm_r6 2502 return (jint)os::restartable_read(fd, buf, nbytes); 2503JVM_END 2504 2505 2506JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes)) 2507 JVMWrapper2("JVM_Write (0x%x)", fd); 2508 2509 //%note jvm_r6 2510 return (jint)os::write(fd, buf, nbytes); 2511JVM_END 2512 2513 2514JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes)) 2515 JVMWrapper2("JVM_Available (0x%x)", fd); 2516 //%note jvm_r6 2517 return os::available(fd, pbytes); 2518JVM_END 2519 2520 2521JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence)) 2522 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence); 2523 //%note jvm_r6 2524 return os::lseek(fd, offset, whence); 2525JVM_END 2526 2527 2528JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length)) 2529 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length); 2530 return os::ftruncate(fd, length); 2531JVM_END 2532 2533 2534JVM_LEAF(jint, JVM_Sync(jint fd)) 2535 JVMWrapper2("JVM_Sync (0x%x)", fd); 2536 //%note jvm_r6 2537 return os::fsync(fd); 2538JVM_END 2539 2540 2541// Printing support ////////////////////////////////////////////////// 2542extern "C" { 2543 2544int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) { 2545 // see bug 4399518, 4417214 2546 if ((intptr_t)count <= 0) return -1; 2547 return vsnprintf(str, count, fmt, args); 2548} 2549 2550 2551int jio_snprintf(char *str, size_t count, const char *fmt, ...) { 2552 va_list args; 2553 int len; 2554 va_start(args, fmt); 2555 len = jio_vsnprintf(str, count, fmt, args); 2556 va_end(args); 2557 return len; 2558} 2559 2560 2561int jio_fprintf(FILE* f, const char *fmt, ...) { 2562 int len; 2563 va_list args; 2564 va_start(args, fmt); 2565 len = jio_vfprintf(f, fmt, args); 2566 va_end(args); 2567 return len; 2568} 2569 2570 2571int jio_vfprintf(FILE* f, const char *fmt, va_list args) { 2572 if (Arguments::vfprintf_hook() != NULL) { 2573 return Arguments::vfprintf_hook()(f, fmt, args); 2574 } else { 2575 return vfprintf(f, fmt, args); 2576 } 2577} 2578 2579 2580JNIEXPORT int jio_printf(const char *fmt, ...) { 2581 int len; 2582 va_list args; 2583 va_start(args, fmt); 2584 len = jio_vfprintf(defaultStream::output_stream(), fmt, args); 2585 va_end(args); 2586 return len; 2587} 2588 2589 2590// HotSpot specific jio method 2591void jio_print(const char* s) { 2592 // Try to make this function as atomic as possible. 2593 if (Arguments::vfprintf_hook() != NULL) { 2594 jio_fprintf(defaultStream::output_stream(), "%s", s); 2595 } else { 2596 // Make an unused local variable to avoid warning from gcc 4.x compiler. 2597 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s)); 2598 } 2599} 2600 2601} // Extern C 2602 2603// java.lang.Thread ////////////////////////////////////////////////////////////////////////////// 2604 2605// In most of the JVM Thread support functions we need to be sure to lock the Threads_lock 2606// to prevent the target thread from exiting after we have a pointer to the C++ Thread or 2607// OSThread objects. The exception to this rule is when the target object is the thread 2608// doing the operation, in which case we know that the thread won't exit until the 2609// operation is done (all exits being voluntary). There are a few cases where it is 2610// rather silly to do operations on yourself, like resuming yourself or asking whether 2611// you are alive. While these can still happen, they are not subject to deadlocks if 2612// the lock is held while the operation occurs (this is not the case for suspend, for 2613// instance), and are very unlikely. Because IsAlive needs to be fast and its 2614// implementation is local to this file, we always lock Threads_lock for that one. 2615 2616static void thread_entry(JavaThread* thread, TRAPS) { 2617 HandleMark hm(THREAD); 2618 Handle obj(THREAD, thread->threadObj()); 2619 JavaValue result(T_VOID); 2620 JavaCalls::call_virtual(&result, 2621 obj, 2622 KlassHandle(THREAD, SystemDictionary::Thread_klass()), 2623 vmSymbols::run_method_name(), 2624 vmSymbols::void_method_signature(), 2625 THREAD); 2626} 2627 2628 2629JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread)) 2630 JVMWrapper("JVM_StartThread"); 2631 JavaThread *native_thread = NULL; 2632 2633 // We cannot hold the Threads_lock when we throw an exception, 2634 // due to rank ordering issues. Example: we might need to grab the 2635 // Heap_lock while we construct the exception. 2636 bool throw_illegal_thread_state = false; 2637 2638 // We must release the Threads_lock before we can post a jvmti event 2639 // in Thread::start. 2640 { 2641 // Ensure that the C++ Thread and OSThread structures aren't freed before 2642 // we operate. 2643 MutexLocker mu(Threads_lock); 2644 2645 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent 2646 // re-starting an already started thread, so we should usually find 2647 // that the JavaThread is null. However for a JNI attached thread 2648 // there is a small window between the Thread object being created 2649 // (with its JavaThread set) and the update to its threadStatus, so we 2650 // have to check for this 2651 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) { 2652 throw_illegal_thread_state = true; 2653 } else { 2654 // We could also check the stillborn flag to see if this thread was already stopped, but 2655 // for historical reasons we let the thread detect that itself when it starts running 2656 2657 jlong size = 2658 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread)); 2659 // Allocate the C++ Thread structure and create the native thread. The 2660 // stack size retrieved from java is signed, but the constructor takes 2661 // size_t (an unsigned type), so avoid passing negative values which would 2662 // result in really large stacks. 2663 size_t sz = size > 0 ? (size_t) size : 0; 2664 native_thread = new JavaThread(&thread_entry, sz); 2665 2666 // At this point it may be possible that no osthread was created for the 2667 // JavaThread due to lack of memory. Check for this situation and throw 2668 // an exception if necessary. Eventually we may want to change this so 2669 // that we only grab the lock if the thread was created successfully - 2670 // then we can also do this check and throw the exception in the 2671 // JavaThread constructor. 2672 if (native_thread->osthread() != NULL) { 2673 // Note: the current thread is not being used within "prepare". 2674 native_thread->prepare(jthread); 2675 } 2676 } 2677 } 2678 2679 if (throw_illegal_thread_state) { 2680 THROW(vmSymbols::java_lang_IllegalThreadStateException()); 2681 } 2682 2683 assert(native_thread != NULL, "Starting null thread?"); 2684 2685 if (native_thread->osthread() == NULL) { 2686 // No one should hold a reference to the 'native_thread'. 2687 delete native_thread; 2688 if (JvmtiExport::should_post_resource_exhausted()) { 2689 JvmtiExport::post_resource_exhausted( 2690 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS, 2691 "unable to create new native thread"); 2692 } 2693 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), 2694 "unable to create new native thread"); 2695 } 2696 2697 Thread::start(native_thread); 2698 2699JVM_END 2700 2701// JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints 2702// before the quasi-asynchronous exception is delivered. This is a little obtrusive, 2703// but is thought to be reliable and simple. In the case, where the receiver is the 2704// same thread as the sender, no safepoint is needed. 2705JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable)) 2706 JVMWrapper("JVM_StopThread"); 2707 2708 oop java_throwable = JNIHandles::resolve(throwable); 2709 if (java_throwable == NULL) { 2710 THROW(vmSymbols::java_lang_NullPointerException()); 2711 } 2712 oop java_thread = JNIHandles::resolve_non_null(jthread); 2713 JavaThread* receiver = java_lang_Thread::thread(java_thread); 2714 Events::log_exception(JavaThread::current(), 2715 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", 2716 receiver, (address)java_thread, throwable); 2717 // First check if thread is alive 2718 if (receiver != NULL) { 2719 // Check if exception is getting thrown at self (use oop equality, since the 2720 // target object might exit) 2721 if (java_thread == thread->threadObj()) { 2722 THROW_OOP(java_throwable); 2723 } else { 2724 // Enques a VM_Operation to stop all threads and then deliver the exception... 2725 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable)); 2726 } 2727 } 2728 else { 2729 // Either: 2730 // - target thread has not been started before being stopped, or 2731 // - target thread already terminated 2732 // We could read the threadStatus to determine which case it is 2733 // but that is overkill as it doesn't matter. We must set the 2734 // stillborn flag for the first case, and if the thread has already 2735 // exited setting this flag has no affect 2736 java_lang_Thread::set_stillborn(java_thread); 2737 } 2738JVM_END 2739 2740 2741JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread)) 2742 JVMWrapper("JVM_IsThreadAlive"); 2743 2744 oop thread_oop = JNIHandles::resolve_non_null(jthread); 2745 return java_lang_Thread::is_alive(thread_oop); 2746JVM_END 2747 2748 2749JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread)) 2750 JVMWrapper("JVM_SuspendThread"); 2751 oop java_thread = JNIHandles::resolve_non_null(jthread); 2752 JavaThread* receiver = java_lang_Thread::thread(java_thread); 2753 2754 if (receiver != NULL) { 2755 // thread has run and has not exited (still on threads list) 2756 2757 { 2758 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag); 2759 if (receiver->is_external_suspend()) { 2760 // Don't allow nested external suspend requests. We can't return 2761 // an error from this interface so just ignore the problem. 2762 return; 2763 } 2764 if (receiver->is_exiting()) { // thread is in the process of exiting 2765 return; 2766 } 2767 receiver->set_external_suspend(); 2768 } 2769 2770 // java_suspend() will catch threads in the process of exiting 2771 // and will ignore them. 2772 receiver->java_suspend(); 2773 2774 // It would be nice to have the following assertion in all the 2775 // time, but it is possible for a racing resume request to have 2776 // resumed this thread right after we suspended it. Temporarily 2777 // enable this assertion if you are chasing a different kind of 2778 // bug. 2779 // 2780 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL || 2781 // receiver->is_being_ext_suspended(), "thread is not suspended"); 2782 } 2783JVM_END 2784 2785 2786JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread)) 2787 JVMWrapper("JVM_ResumeThread"); 2788 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate. 2789 // We need to *always* get the threads lock here, since this operation cannot be allowed during 2790 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other 2791 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code 2792 // looks at it. 2793 MutexLocker ml(Threads_lock); 2794 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 2795 if (thr != NULL) { 2796 // the thread has run and is not in the process of exiting 2797 thr->java_resume(); 2798 } 2799JVM_END 2800 2801 2802JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio)) 2803 JVMWrapper("JVM_SetThreadPriority"); 2804 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 2805 MutexLocker ml(Threads_lock); 2806 oop java_thread = JNIHandles::resolve_non_null(jthread); 2807 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio); 2808 JavaThread* thr = java_lang_Thread::thread(java_thread); 2809 if (thr != NULL) { // Thread not yet started; priority pushed down when it is 2810 Thread::set_priority(thr, (ThreadPriority)prio); 2811 } 2812JVM_END 2813 2814 2815JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass)) 2816 JVMWrapper("JVM_Yield"); 2817 if (os::dont_yield()) return; 2818#ifndef USDT2 2819 HS_DTRACE_PROBE0(hotspot, thread__yield); 2820#else /* USDT2 */ 2821 HOTSPOT_THREAD_YIELD(); 2822#endif /* USDT2 */ 2823 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield. 2824 // Critical for similar threading behaviour 2825 if (ConvertYieldToSleep) { 2826 os::sleep(thread, MinSleepInterval, false); 2827 } else { 2828 os::yield(); 2829 } 2830JVM_END 2831 2832 2833JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis)) 2834 JVMWrapper("JVM_Sleep"); 2835 2836 if (millis < 0) { 2837 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative"); 2838 } 2839 2840 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) { 2841 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); 2842 } 2843 2844 // Save current thread state and restore it at the end of this block. 2845 // And set new thread state to SLEEPING. 2846 JavaThreadSleepState jtss(thread); 2847 2848#ifndef USDT2 2849 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis); 2850#else /* USDT2 */ 2851 HOTSPOT_THREAD_SLEEP_BEGIN( 2852 millis); 2853#endif /* USDT2 */ 2854 2855 if (millis == 0) { 2856 // When ConvertSleepToYield is on, this matches the classic VM implementation of 2857 // JVM_Sleep. Critical for similar threading behaviour (Win32) 2858 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep 2859 // for SOLARIS 2860 if (ConvertSleepToYield) { 2861 os::yield(); 2862 } else { 2863 ThreadState old_state = thread->osthread()->get_state(); 2864 thread->osthread()->set_state(SLEEPING); 2865 os::sleep(thread, MinSleepInterval, false); 2866 thread->osthread()->set_state(old_state); 2867 } 2868 } else { 2869 ThreadState old_state = thread->osthread()->get_state(); 2870 thread->osthread()->set_state(SLEEPING); 2871 if (os::sleep(thread, millis, true) == OS_INTRPT) { 2872 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on 2873 // us while we were sleeping. We do not overwrite those. 2874 if (!HAS_PENDING_EXCEPTION) { 2875#ifndef USDT2 2876 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1); 2877#else /* USDT2 */ 2878 HOTSPOT_THREAD_SLEEP_END( 2879 1); 2880#endif /* USDT2 */ 2881 // TODO-FIXME: THROW_MSG returns which means we will not call set_state() 2882 // to properly restore the thread state. That's likely wrong. 2883 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); 2884 } 2885 } 2886 thread->osthread()->set_state(old_state); 2887 } 2888#ifndef USDT2 2889 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0); 2890#else /* USDT2 */ 2891 HOTSPOT_THREAD_SLEEP_END( 2892 0); 2893#endif /* USDT2 */ 2894JVM_END 2895 2896JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass)) 2897 JVMWrapper("JVM_CurrentThread"); 2898 oop jthread = thread->threadObj(); 2899 assert (thread != NULL, "no current thread!"); 2900 return JNIHandles::make_local(env, jthread); 2901JVM_END 2902 2903 2904JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread)) 2905 JVMWrapper("JVM_CountStackFrames"); 2906 2907 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 2908 oop java_thread = JNIHandles::resolve_non_null(jthread); 2909 bool throw_illegal_thread_state = false; 2910 int count = 0; 2911 2912 { 2913 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 2914 // We need to re-resolve the java_thread, since a GC might have happened during the 2915 // acquire of the lock 2916 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 2917 2918 if (thr == NULL) { 2919 // do nothing 2920 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) { 2921 // Check whether this java thread has been suspended already. If not, throws 2922 // IllegalThreadStateException. We defer to throw that exception until 2923 // Threads_lock is released since loading exception class has to leave VM. 2924 // The correct way to test a thread is actually suspended is 2925 // wait_for_ext_suspend_completion(), but we can't call that while holding 2926 // the Threads_lock. The above tests are sufficient for our purposes 2927 // provided the walkability of the stack is stable - which it isn't 2928 // 100% but close enough for most practical purposes. 2929 throw_illegal_thread_state = true; 2930 } else { 2931 // Count all java activation, i.e., number of vframes 2932 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) { 2933 // Native frames are not counted 2934 if (!vfst.method()->is_native()) count++; 2935 } 2936 } 2937 } 2938 2939 if (throw_illegal_thread_state) { 2940 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(), 2941 "this thread is not suspended"); 2942 } 2943 return count; 2944JVM_END 2945 2946// Consider: A better way to implement JVM_Interrupt() is to acquire 2947// Threads_lock to resolve the jthread into a Thread pointer, fetch 2948// Thread->platformevent, Thread->native_thr, Thread->parker, etc., 2949// drop Threads_lock, and the perform the unpark() and thr_kill() operations 2950// outside the critical section. Threads_lock is hot so we want to minimize 2951// the hold-time. A cleaner interface would be to decompose interrupt into 2952// two steps. The 1st phase, performed under Threads_lock, would return 2953// a closure that'd be invoked after Threads_lock was dropped. 2954// This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and 2955// admit spurious wakeups. 2956 2957JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread)) 2958 JVMWrapper("JVM_Interrupt"); 2959 2960 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 2961 oop java_thread = JNIHandles::resolve_non_null(jthread); 2962 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 2963 // We need to re-resolve the java_thread, since a GC might have happened during the 2964 // acquire of the lock 2965 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 2966 if (thr != NULL) { 2967 Thread::interrupt(thr); 2968 } 2969JVM_END 2970 2971 2972JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted)) 2973 JVMWrapper("JVM_IsInterrupted"); 2974 2975 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 2976 oop java_thread = JNIHandles::resolve_non_null(jthread); 2977 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 2978 // We need to re-resolve the java_thread, since a GC might have happened during the 2979 // acquire of the lock 2980 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 2981 if (thr == NULL) { 2982 return JNI_FALSE; 2983 } else { 2984 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0); 2985 } 2986JVM_END 2987 2988 2989// Return true iff the current thread has locked the object passed in 2990 2991JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj)) 2992 JVMWrapper("JVM_HoldsLock"); 2993 assert(THREAD->is_Java_thread(), "sanity check"); 2994 if (obj == NULL) { 2995 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); 2996 } 2997 Handle h_obj(THREAD, JNIHandles::resolve(obj)); 2998 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj); 2999JVM_END 3000 3001 3002JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass)) 3003 JVMWrapper("JVM_DumpAllStacks"); 3004 VM_PrintThreads op; 3005 VMThread::execute(&op); 3006 if (JvmtiExport::should_post_data_dump()) { 3007 JvmtiExport::post_data_dump(); 3008 } 3009JVM_END 3010 3011JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name)) 3012 JVMWrapper("JVM_SetNativeThreadName"); 3013 ResourceMark rm(THREAD); 3014 oop java_thread = JNIHandles::resolve_non_null(jthread); 3015 JavaThread* thr = java_lang_Thread::thread(java_thread); 3016 // Thread naming only supported for the current thread, doesn't work for 3017 // target threads. 3018 if (Thread::current() == thr && !thr->has_attached_via_jni()) { 3019 // we don't set the name of an attached thread to avoid stepping 3020 // on other programs 3021 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); 3022 os::set_native_thread_name(thread_name); 3023 } 3024JVM_END 3025 3026// java.lang.SecurityManager /////////////////////////////////////////////////////////////////////// 3027 3028static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) { 3029 assert(jthread->is_Java_thread(), "must be a Java thread"); 3030 if (jthread->privileged_stack_top() == NULL) return false; 3031 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) { 3032 oop loader = jthread->privileged_stack_top()->class_loader(); 3033 if (loader == NULL) return true; 3034 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); 3035 if (trusted) return true; 3036 } 3037 return false; 3038} 3039 3040JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env)) 3041 JVMWrapper("JVM_CurrentLoadedClass"); 3042 ResourceMark rm(THREAD); 3043 3044 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3045 // if a method in a class in a trusted loader is in a doPrivileged, return NULL 3046 bool trusted = is_trusted_frame(thread, &vfst); 3047 if (trusted) return NULL; 3048 3049 Method* m = vfst.method(); 3050 if (!m->is_native()) { 3051 Klass* holder = m->method_holder(); 3052 oop loader = InstanceKlass::cast(holder)->class_loader(); 3053 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3054 return (jclass) JNIHandles::make_local(env, Klass::cast(holder)->java_mirror()); 3055 } 3056 } 3057 } 3058 return NULL; 3059JVM_END 3060 3061 3062JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env)) 3063 JVMWrapper("JVM_CurrentClassLoader"); 3064 ResourceMark rm(THREAD); 3065 3066 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3067 3068 // if a method in a class in a trusted loader is in a doPrivileged, return NULL 3069 bool trusted = is_trusted_frame(thread, &vfst); 3070 if (trusted) return NULL; 3071 3072 Method* m = vfst.method(); 3073 if (!m->is_native()) { 3074 Klass* holder = m->method_holder(); 3075 assert(holder->is_klass(), "just checking"); 3076 oop loader = InstanceKlass::cast(holder)->class_loader(); 3077 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3078 return JNIHandles::make_local(env, loader); 3079 } 3080 } 3081 } 3082 return NULL; 3083JVM_END 3084 3085 3086// Utility object for collecting method holders walking down the stack 3087class KlassLink: public ResourceObj { 3088 public: 3089 KlassHandle klass; 3090 KlassLink* next; 3091 3092 KlassLink(KlassHandle k) { klass = k; next = NULL; } 3093}; 3094 3095 3096JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env)) 3097 JVMWrapper("JVM_GetClassContext"); 3098 ResourceMark rm(THREAD); 3099 JvmtiVMObjectAllocEventCollector oam; 3100 // Collect linked list of (handles to) method holders 3101 KlassLink* first = NULL; 3102 KlassLink* last = NULL; 3103 int depth = 0; 3104 3105 for(vframeStream vfst(thread); !vfst.at_end(); vfst.security_get_caller_frame(1)) { 3106 // Native frames are not returned 3107 if (!vfst.method()->is_native()) { 3108 Klass* holder = vfst.method()->method_holder(); 3109 assert(holder->is_klass(), "just checking"); 3110 depth++; 3111 KlassLink* l = new KlassLink(KlassHandle(thread, holder)); 3112 if (first == NULL) { 3113 first = last = l; 3114 } else { 3115 last->next = l; 3116 last = l; 3117 } 3118 } 3119 } 3120 3121 // Create result array of type [Ljava/lang/Class; 3122 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), depth, CHECK_NULL); 3123 // Fill in mirrors corresponding to method holders 3124 int index = 0; 3125 while (first != NULL) { 3126 result->obj_at_put(index++, Klass::cast(first->klass())->java_mirror()); 3127 first = first->next; 3128 } 3129 assert(index == depth, "just checking"); 3130 3131 return (jobjectArray) JNIHandles::make_local(env, result); 3132JVM_END 3133 3134 3135JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name)) 3136 JVMWrapper("JVM_ClassDepth"); 3137 ResourceMark rm(THREAD); 3138 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); 3139 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0); 3140 3141 const char* str = java_lang_String::as_utf8_string(class_name_str()); 3142 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str)); 3143 if (class_name_sym == NULL) { 3144 return -1; 3145 } 3146 3147 int depth = 0; 3148 3149 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3150 if (!vfst.method()->is_native()) { 3151 Klass* holder = vfst.method()->method_holder(); 3152 assert(holder->is_klass(), "just checking"); 3153 if (InstanceKlass::cast(holder)->name() == class_name_sym) { 3154 return depth; 3155 } 3156 depth++; 3157 } 3158 } 3159 return -1; 3160JVM_END 3161 3162 3163JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env)) 3164 JVMWrapper("JVM_ClassLoaderDepth"); 3165 ResourceMark rm(THREAD); 3166 int depth = 0; 3167 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3168 // if a method in a class in a trusted loader is in a doPrivileged, return -1 3169 bool trusted = is_trusted_frame(thread, &vfst); 3170 if (trusted) return -1; 3171 3172 Method* m = vfst.method(); 3173 if (!m->is_native()) { 3174 Klass* holder = m->method_holder(); 3175 assert(holder->is_klass(), "just checking"); 3176 oop loader = InstanceKlass::cast(holder)->class_loader(); 3177 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3178 return depth; 3179 } 3180 depth++; 3181 } 3182 } 3183 return -1; 3184JVM_END 3185 3186 3187// java.lang.Package //////////////////////////////////////////////////////////////// 3188 3189 3190JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name)) 3191 JVMWrapper("JVM_GetSystemPackage"); 3192 ResourceMark rm(THREAD); 3193 JvmtiVMObjectAllocEventCollector oam; 3194 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); 3195 oop result = ClassLoader::get_system_package(str, CHECK_NULL); 3196 return (jstring) JNIHandles::make_local(result); 3197JVM_END 3198 3199 3200JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env)) 3201 JVMWrapper("JVM_GetSystemPackages"); 3202 JvmtiVMObjectAllocEventCollector oam; 3203 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL); 3204 return (jobjectArray) JNIHandles::make_local(result); 3205JVM_END 3206 3207 3208// ObjectInputStream /////////////////////////////////////////////////////////////// 3209 3210bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) { 3211 if (current_class == NULL) { 3212 return true; 3213 } 3214 if ((current_class == field_class) || access.is_public()) { 3215 return true; 3216 } 3217 3218 if (access.is_protected()) { 3219 // See if current_class is a subclass of field_class 3220 if (Klass::cast(current_class)->is_subclass_of(field_class)) { 3221 return true; 3222 } 3223 } 3224 3225 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class)); 3226} 3227 3228 3229// JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4 3230JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass)) 3231 JVMWrapper("JVM_AllocateNewObject"); 3232 JvmtiVMObjectAllocEventCollector oam; 3233 // Receiver is not used 3234 oop curr_mirror = JNIHandles::resolve_non_null(currClass); 3235 oop init_mirror = JNIHandles::resolve_non_null(initClass); 3236 3237 // Cannot instantiate primitive types 3238 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) { 3239 ResourceMark rm(THREAD); 3240 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3241 } 3242 3243 // Arrays not allowed here, must use JVM_AllocateNewArray 3244 if (Klass::cast(java_lang_Class::as_Klass(curr_mirror))->oop_is_array() || 3245 Klass::cast(java_lang_Class::as_Klass(init_mirror))->oop_is_array()) { 3246 ResourceMark rm(THREAD); 3247 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3248 } 3249 3250 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror)); 3251 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror)); 3252 3253 assert(curr_klass->is_subclass_of(init_klass()), "just checking"); 3254 3255 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly. 3256 curr_klass->check_valid_for_instantiation(false, CHECK_NULL); 3257 3258 // Make sure klass is initialized, since we are about to instantiate one of them. 3259 curr_klass->initialize(CHECK_NULL); 3260 3261 methodHandle m (THREAD, 3262 init_klass->find_method(vmSymbols::object_initializer_name(), 3263 vmSymbols::void_method_signature())); 3264 if (m.is_null()) { 3265 ResourceMark rm(THREAD); 3266 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), 3267 Method::name_and_sig_as_C_string(Klass::cast(init_klass()), 3268 vmSymbols::object_initializer_name(), 3269 vmSymbols::void_method_signature())); 3270 } 3271 3272 if (curr_klass == init_klass && !m->is_public()) { 3273 // Calling the constructor for class 'curr_klass'. 3274 // Only allow calls to a public no-arg constructor. 3275 // This path corresponds to creating an Externalizable object. 3276 THROW_0(vmSymbols::java_lang_IllegalAccessException()); 3277 } 3278 3279 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) { 3280 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb' 3281 THROW_0(vmSymbols::java_lang_IllegalAccessException()); 3282 } 3283 3284 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL); 3285 // Call constructor m. This might call a constructor higher up in the hierachy 3286 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL); 3287 3288 return JNIHandles::make_local(obj()); 3289JVM_END 3290 3291 3292JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length)) 3293 JVMWrapper("JVM_AllocateNewArray"); 3294 JvmtiVMObjectAllocEventCollector oam; 3295 oop mirror = JNIHandles::resolve_non_null(currClass); 3296 3297 if (java_lang_Class::is_primitive(mirror)) { 3298 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3299 } 3300 Klass* k = java_lang_Class::as_Klass(mirror); 3301 oop result; 3302 3303 if (k->oop_is_typeArray()) { 3304 // typeArray 3305 result = typeArrayKlass::cast(k)->allocate(length, CHECK_NULL); 3306 } else if (k->oop_is_objArray()) { 3307 // objArray 3308 objArrayKlass* oak = objArrayKlass::cast(k); 3309 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior) 3310 result = oak->allocate(length, CHECK_NULL); 3311 } else { 3312 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3313 } 3314 return JNIHandles::make_local(env, result); 3315JVM_END 3316 3317 3318// Return the first non-null class loader up the execution stack, or null 3319// if only code from the null class loader is on the stack. 3320 3321JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env)) 3322 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3323 // UseNewReflection 3324 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection 3325 Klass* holder = vfst.method()->method_holder(); 3326 oop loader = InstanceKlass::cast(holder)->class_loader(); 3327 if (loader != NULL) { 3328 return JNIHandles::make_local(env, loader); 3329 } 3330 } 3331 return NULL; 3332JVM_END 3333 3334 3335// Load a class relative to the most recent class on the stack with a non-null 3336// classloader. 3337// This function has been deprecated and should not be considered part of the 3338// specified JVM interface. 3339 3340JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver, 3341 jclass currClass, jstring currClassName)) 3342 JVMWrapper("JVM_LoadClass0"); 3343 // Receiver is not used 3344 ResourceMark rm(THREAD); 3345 3346 // Class name argument is not guaranteed to be in internal format 3347 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName)); 3348 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL); 3349 3350 const char* str = java_lang_String::as_utf8_string(string()); 3351 3352 if (str == NULL || (int)strlen(str) > Symbol::max_length()) { 3353 // It's impossible to create this class; the name cannot fit 3354 // into the constant pool. 3355 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str); 3356 } 3357 3358 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL); 3359 Handle curr_klass (THREAD, JNIHandles::resolve(currClass)); 3360 // Find the most recent class on the stack with a non-null classloader 3361 oop loader = NULL; 3362 oop protection_domain = NULL; 3363 if (curr_klass.is_null()) { 3364 for (vframeStream vfst(thread); 3365 !vfst.at_end() && loader == NULL; 3366 vfst.next()) { 3367 if (!vfst.method()->is_native()) { 3368 Klass* holder = vfst.method()->method_holder(); 3369 loader = InstanceKlass::cast(holder)->class_loader(); 3370 protection_domain = InstanceKlass::cast(holder)->protection_domain(); 3371 } 3372 } 3373 } else { 3374 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass()); 3375 loader = InstanceKlass::cast(curr_klass_oop)->class_loader(); 3376 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain(); 3377 } 3378 Handle h_loader(THREAD, loader); 3379 Handle h_prot (THREAD, protection_domain); 3380 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot, 3381 false, thread); 3382 if (TraceClassResolution && result != NULL) { 3383 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3384 } 3385 return result; 3386JVM_END 3387 3388 3389// Array /////////////////////////////////////////////////////////////////////////////////////////// 3390 3391 3392// resolve array handle and check arguments 3393static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) { 3394 if (arr == NULL) { 3395 THROW_0(vmSymbols::java_lang_NullPointerException()); 3396 } 3397 oop a = JNIHandles::resolve_non_null(arr); 3398 if (!a->is_array() || (type_array_only && !a->is_typeArray())) { 3399 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array"); 3400 } 3401 return arrayOop(a); 3402} 3403 3404 3405JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr)) 3406 JVMWrapper("JVM_GetArrayLength"); 3407 arrayOop a = check_array(env, arr, false, CHECK_0); 3408 return a->length(); 3409JVM_END 3410 3411 3412JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index)) 3413 JVMWrapper("JVM_Array_Get"); 3414 JvmtiVMObjectAllocEventCollector oam; 3415 arrayOop a = check_array(env, arr, false, CHECK_NULL); 3416 jvalue value; 3417 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL); 3418 oop box = Reflection::box(&value, type, CHECK_NULL); 3419 return JNIHandles::make_local(env, box); 3420JVM_END 3421 3422 3423JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode)) 3424 JVMWrapper("JVM_GetPrimitiveArrayElement"); 3425 jvalue value; 3426 value.i = 0; // to initialize value before getting used in CHECK 3427 arrayOop a = check_array(env, arr, true, CHECK_(value)); 3428 assert(a->is_typeArray(), "just checking"); 3429 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value)); 3430 BasicType wide_type = (BasicType) wCode; 3431 if (type != wide_type) { 3432 Reflection::widen(&value, type, wide_type, CHECK_(value)); 3433 } 3434 return value; 3435JVM_END 3436 3437 3438JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val)) 3439 JVMWrapper("JVM_SetArrayElement"); 3440 arrayOop a = check_array(env, arr, false, CHECK); 3441 oop box = JNIHandles::resolve(val); 3442 jvalue value; 3443 value.i = 0; // to initialize value before getting used in CHECK 3444 BasicType value_type; 3445 if (a->is_objArray()) { 3446 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array 3447 value_type = Reflection::unbox_for_regular_object(box, &value); 3448 } else { 3449 value_type = Reflection::unbox_for_primitive(box, &value, CHECK); 3450 } 3451 Reflection::array_set(&value, a, index, value_type, CHECK); 3452JVM_END 3453 3454 3455JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode)) 3456 JVMWrapper("JVM_SetPrimitiveArrayElement"); 3457 arrayOop a = check_array(env, arr, true, CHECK); 3458 assert(a->is_typeArray(), "just checking"); 3459 BasicType value_type = (BasicType) vCode; 3460 Reflection::array_set(&v, a, index, value_type, CHECK); 3461JVM_END 3462 3463 3464JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length)) 3465 JVMWrapper("JVM_NewArray"); 3466 JvmtiVMObjectAllocEventCollector oam; 3467 oop element_mirror = JNIHandles::resolve(eltClass); 3468 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL); 3469 return JNIHandles::make_local(env, result); 3470JVM_END 3471 3472 3473JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim)) 3474 JVMWrapper("JVM_NewMultiArray"); 3475 JvmtiVMObjectAllocEventCollector oam; 3476 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL); 3477 oop element_mirror = JNIHandles::resolve(eltClass); 3478 assert(dim_array->is_typeArray(), "just checking"); 3479 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL); 3480 return JNIHandles::make_local(env, result); 3481JVM_END 3482 3483 3484// Networking library support //////////////////////////////////////////////////////////////////// 3485 3486JVM_LEAF(jint, JVM_InitializeSocketLibrary()) 3487 JVMWrapper("JVM_InitializeSocketLibrary"); 3488 return 0; 3489JVM_END 3490 3491 3492JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol)) 3493 JVMWrapper("JVM_Socket"); 3494 return os::socket(domain, type, protocol); 3495JVM_END 3496 3497 3498JVM_LEAF(jint, JVM_SocketClose(jint fd)) 3499 JVMWrapper2("JVM_SocketClose (0x%x)", fd); 3500 //%note jvm_r6 3501 return os::socket_close(fd); 3502JVM_END 3503 3504 3505JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto)) 3506 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd); 3507 //%note jvm_r6 3508 return os::socket_shutdown(fd, howto); 3509JVM_END 3510 3511 3512JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags)) 3513 JVMWrapper2("JVM_Recv (0x%x)", fd); 3514 //%note jvm_r6 3515 return os::recv(fd, buf, (size_t)nBytes, (uint)flags); 3516JVM_END 3517 3518 3519JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags)) 3520 JVMWrapper2("JVM_Send (0x%x)", fd); 3521 //%note jvm_r6 3522 return os::send(fd, buf, (size_t)nBytes, (uint)flags); 3523JVM_END 3524 3525 3526JVM_LEAF(jint, JVM_Timeout(int fd, long timeout)) 3527 JVMWrapper2("JVM_Timeout (0x%x)", fd); 3528 //%note jvm_r6 3529 return os::timeout(fd, timeout); 3530JVM_END 3531 3532 3533JVM_LEAF(jint, JVM_Listen(jint fd, jint count)) 3534 JVMWrapper2("JVM_Listen (0x%x)", fd); 3535 //%note jvm_r6 3536 return os::listen(fd, count); 3537JVM_END 3538 3539 3540JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len)) 3541 JVMWrapper2("JVM_Connect (0x%x)", fd); 3542 //%note jvm_r6 3543 return os::connect(fd, him, (socklen_t)len); 3544JVM_END 3545 3546 3547JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len)) 3548 JVMWrapper2("JVM_Bind (0x%x)", fd); 3549 //%note jvm_r6 3550 return os::bind(fd, him, (socklen_t)len); 3551JVM_END 3552 3553 3554JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len)) 3555 JVMWrapper2("JVM_Accept (0x%x)", fd); 3556 //%note jvm_r6 3557 socklen_t socklen = (socklen_t)(*len); 3558 jint result = os::accept(fd, him, &socklen); 3559 *len = (jint)socklen; 3560 return result; 3561JVM_END 3562 3563 3564JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen)) 3565 JVMWrapper2("JVM_RecvFrom (0x%x)", fd); 3566 //%note jvm_r6 3567 socklen_t socklen = (socklen_t)(*fromlen); 3568 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen); 3569 *fromlen = (int)socklen; 3570 return result; 3571JVM_END 3572 3573 3574JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len)) 3575 JVMWrapper2("JVM_GetSockName (0x%x)", fd); 3576 //%note jvm_r6 3577 socklen_t socklen = (socklen_t)(*len); 3578 jint result = os::get_sock_name(fd, him, &socklen); 3579 *len = (int)socklen; 3580 return result; 3581JVM_END 3582 3583 3584JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen)) 3585 JVMWrapper2("JVM_SendTo (0x%x)", fd); 3586 //%note jvm_r6 3587 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen); 3588JVM_END 3589 3590 3591JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes)) 3592 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd); 3593 //%note jvm_r6 3594 return os::socket_available(fd, pbytes); 3595JVM_END 3596 3597 3598JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen)) 3599 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); 3600 //%note jvm_r6 3601 socklen_t socklen = (socklen_t)(*optlen); 3602 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen); 3603 *optlen = (int)socklen; 3604 return result; 3605JVM_END 3606 3607 3608JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen)) 3609 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); 3610 //%note jvm_r6 3611 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen); 3612JVM_END 3613 3614 3615JVM_LEAF(int, JVM_GetHostName(char* name, int namelen)) 3616 JVMWrapper("JVM_GetHostName"); 3617 return os::get_host_name(name, namelen); 3618JVM_END 3619 3620 3621// Library support /////////////////////////////////////////////////////////////////////////// 3622 3623JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name)) 3624 //%note jvm_ct 3625 JVMWrapper2("JVM_LoadLibrary (%s)", name); 3626 char ebuf[1024]; 3627 void *load_result; 3628 { 3629 ThreadToNativeFromVM ttnfvm(thread); 3630 load_result = os::dll_load(name, ebuf, sizeof ebuf); 3631 } 3632 if (load_result == NULL) { 3633 char msg[1024]; 3634 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf); 3635 // Since 'ebuf' may contain a string encoded using 3636 // platform encoding scheme, we need to pass 3637 // Exceptions::unsafe_to_utf8 to the new_exception method 3638 // as the last argument. See bug 6367357. 3639 Handle h_exception = 3640 Exceptions::new_exception(thread, 3641 vmSymbols::java_lang_UnsatisfiedLinkError(), 3642 msg, Exceptions::unsafe_to_utf8); 3643 3644 THROW_HANDLE_0(h_exception); 3645 } 3646 return load_result; 3647JVM_END 3648 3649 3650JVM_LEAF(void, JVM_UnloadLibrary(void* handle)) 3651 JVMWrapper("JVM_UnloadLibrary"); 3652 os::dll_unload(handle); 3653JVM_END 3654 3655 3656JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name)) 3657 JVMWrapper2("JVM_FindLibraryEntry (%s)", name); 3658 return os::dll_lookup(handle, name); 3659JVM_END 3660 3661 3662// Floating point support //////////////////////////////////////////////////////////////////// 3663 3664JVM_LEAF(jboolean, JVM_IsNaN(jdouble a)) 3665 JVMWrapper("JVM_IsNaN"); 3666 return g_isnan(a); 3667JVM_END 3668 3669 3670// JNI version /////////////////////////////////////////////////////////////////////////////// 3671 3672JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version)) 3673 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version); 3674 return Threads::is_supported_jni_version_including_1_1(version); 3675JVM_END 3676 3677 3678// String support /////////////////////////////////////////////////////////////////////////// 3679 3680JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str)) 3681 JVMWrapper("JVM_InternString"); 3682 JvmtiVMObjectAllocEventCollector oam; 3683 if (str == NULL) return NULL; 3684 oop string = JNIHandles::resolve_non_null(str); 3685 oop result = StringTable::intern(string, CHECK_NULL); 3686 return (jstring) JNIHandles::make_local(env, result); 3687JVM_END 3688 3689 3690// Raw monitor support ////////////////////////////////////////////////////////////////////// 3691 3692// The lock routine below calls lock_without_safepoint_check in order to get a raw lock 3693// without interfering with the safepoint mechanism. The routines are not JVM_LEAF because 3694// they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check 3695// that only works with java threads. 3696 3697 3698JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) { 3699 VM_Exit::block_if_vm_exited(); 3700 JVMWrapper("JVM_RawMonitorCreate"); 3701 return new Mutex(Mutex::native, "JVM_RawMonitorCreate"); 3702} 3703 3704 3705JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) { 3706 VM_Exit::block_if_vm_exited(); 3707 JVMWrapper("JVM_RawMonitorDestroy"); 3708 delete ((Mutex*) mon); 3709} 3710 3711 3712JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) { 3713 VM_Exit::block_if_vm_exited(); 3714 JVMWrapper("JVM_RawMonitorEnter"); 3715 ((Mutex*) mon)->jvm_raw_lock(); 3716 return 0; 3717} 3718 3719 3720JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) { 3721 VM_Exit::block_if_vm_exited(); 3722 JVMWrapper("JVM_RawMonitorExit"); 3723 ((Mutex*) mon)->jvm_raw_unlock(); 3724} 3725 3726 3727// Support for Serialization 3728 3729typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value); 3730typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value); 3731typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value); 3732typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value); 3733 3734static IntBitsToFloatFn int_bits_to_float_fn = NULL; 3735static LongBitsToDoubleFn long_bits_to_double_fn = NULL; 3736static FloatToIntBitsFn float_to_int_bits_fn = NULL; 3737static DoubleToLongBitsFn double_to_long_bits_fn = NULL; 3738 3739 3740void initialize_converter_functions() { 3741 if (JDK_Version::is_gte_jdk14x_version()) { 3742 // These functions only exist for compatibility with 1.3.1 and earlier 3743 return; 3744 } 3745 3746 // called from universe_post_init() 3747 assert( 3748 int_bits_to_float_fn == NULL && 3749 long_bits_to_double_fn == NULL && 3750 float_to_int_bits_fn == NULL && 3751 double_to_long_bits_fn == NULL , 3752 "initialization done twice" 3753 ); 3754 // initialize 3755 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F")); 3756 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D")); 3757 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I")); 3758 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J")); 3759 // verify 3760 assert( 3761 int_bits_to_float_fn != NULL && 3762 long_bits_to_double_fn != NULL && 3763 float_to_int_bits_fn != NULL && 3764 double_to_long_bits_fn != NULL , 3765 "initialization failed" 3766 ); 3767} 3768 3769 3770// Serialization 3771JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj, 3772 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data)) 3773 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier"); 3774 3775 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes)); 3776 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data)); 3777 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs)); 3778 oop o = JNIHandles::resolve(obj); 3779 3780 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) { 3781 THROW(vmSymbols::java_lang_NullPointerException()); 3782 } 3783 3784 jsize nfids = fids->length(); 3785 if (nfids == 0) return; 3786 3787 if (tcodes->length() < nfids) { 3788 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); 3789 } 3790 3791 jsize off = 0; 3792 /* loop through fields, setting values */ 3793 for (jsize i = 0; i < nfids; i++) { 3794 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i); 3795 int field_offset; 3796 if (fid != NULL) { 3797 // NULL is a legal value for fid, but retrieving the field offset 3798 // trigger assertion in that case 3799 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); 3800 } 3801 3802 switch (tcodes->char_at(i)) { 3803 case 'Z': 3804 if (fid != NULL) { 3805 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE; 3806 o->bool_field_put(field_offset, val); 3807 } 3808 off++; 3809 break; 3810 3811 case 'B': 3812 if (fid != NULL) { 3813 o->byte_field_put(field_offset, dbuf->byte_at(off)); 3814 } 3815 off++; 3816 break; 3817 3818 case 'C': 3819 if (fid != NULL) { 3820 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8) 3821 + ((dbuf->byte_at(off + 1) & 0xFF) << 0); 3822 o->char_field_put(field_offset, val); 3823 } 3824 off += 2; 3825 break; 3826 3827 case 'S': 3828 if (fid != NULL) { 3829 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8) 3830 + ((dbuf->byte_at(off + 1) & 0xFF) << 0); 3831 o->short_field_put(field_offset, val); 3832 } 3833 off += 2; 3834 break; 3835 3836 case 'I': 3837 if (fid != NULL) { 3838 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24) 3839 + ((dbuf->byte_at(off + 1) & 0xFF) << 16) 3840 + ((dbuf->byte_at(off + 2) & 0xFF) << 8) 3841 + ((dbuf->byte_at(off + 3) & 0xFF) << 0); 3842 o->int_field_put(field_offset, ival); 3843 } 3844 off += 4; 3845 break; 3846 3847 case 'F': 3848 if (fid != NULL) { 3849 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24) 3850 + ((dbuf->byte_at(off + 1) & 0xFF) << 16) 3851 + ((dbuf->byte_at(off + 2) & 0xFF) << 8) 3852 + ((dbuf->byte_at(off + 3) & 0xFF) << 0); 3853 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival); 3854 o->float_field_put(field_offset, fval); 3855 } 3856 off += 4; 3857 break; 3858 3859 case 'J': 3860 if (fid != NULL) { 3861 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56) 3862 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48) 3863 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40) 3864 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32) 3865 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24) 3866 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16) 3867 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8) 3868 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0); 3869 o->long_field_put(field_offset, lval); 3870 } 3871 off += 8; 3872 break; 3873 3874 case 'D': 3875 if (fid != NULL) { 3876 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56) 3877 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48) 3878 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40) 3879 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32) 3880 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24) 3881 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16) 3882 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8) 3883 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0); 3884 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval); 3885 o->double_field_put(field_offset, dval); 3886 } 3887 off += 8; 3888 break; 3889 3890 default: 3891 // Illegal typecode 3892 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode"); 3893 } 3894 } 3895JVM_END 3896 3897 3898JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj, 3899 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data)) 3900 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier"); 3901 3902 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes)); 3903 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data)); 3904 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs)); 3905 oop o = JNIHandles::resolve(obj); 3906 3907 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) { 3908 THROW(vmSymbols::java_lang_NullPointerException()); 3909 } 3910 3911 jsize nfids = fids->length(); 3912 if (nfids == 0) return; 3913 3914 if (tcodes->length() < nfids) { 3915 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); 3916 } 3917 3918 /* loop through fields, fetching values */ 3919 jsize off = 0; 3920 for (jsize i = 0; i < nfids; i++) { 3921 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i); 3922 if (fid == NULL) { 3923 THROW(vmSymbols::java_lang_NullPointerException()); 3924 } 3925 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); 3926 3927 switch (tcodes->char_at(i)) { 3928 case 'Z': 3929 { 3930 jboolean val = o->bool_field(field_offset); 3931 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0); 3932 } 3933 break; 3934 3935 case 'B': 3936 dbuf->byte_at_put(off++, o->byte_field(field_offset)); 3937 break; 3938 3939 case 'C': 3940 { 3941 jchar val = o->char_field(field_offset); 3942 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 3943 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 3944 } 3945 break; 3946 3947 case 'S': 3948 { 3949 jshort val = o->short_field(field_offset); 3950 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 3951 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 3952 } 3953 break; 3954 3955 case 'I': 3956 { 3957 jint val = o->int_field(field_offset); 3958 dbuf->byte_at_put(off++, (val >> 24) & 0xFF); 3959 dbuf->byte_at_put(off++, (val >> 16) & 0xFF); 3960 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 3961 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 3962 } 3963 break; 3964 3965 case 'F': 3966 { 3967 jfloat fval = o->float_field(field_offset); 3968 jint ival = (*float_to_int_bits_fn)(env, NULL, fval); 3969 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF); 3970 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF); 3971 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF); 3972 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF); 3973 } 3974 break; 3975 3976 case 'J': 3977 { 3978 jlong val = o->long_field(field_offset); 3979 dbuf->byte_at_put(off++, (val >> 56) & 0xFF); 3980 dbuf->byte_at_put(off++, (val >> 48) & 0xFF); 3981 dbuf->byte_at_put(off++, (val >> 40) & 0xFF); 3982 dbuf->byte_at_put(off++, (val >> 32) & 0xFF); 3983 dbuf->byte_at_put(off++, (val >> 24) & 0xFF); 3984 dbuf->byte_at_put(off++, (val >> 16) & 0xFF); 3985 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 3986 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 3987 } 3988 break; 3989 3990 case 'D': 3991 { 3992 jdouble dval = o->double_field(field_offset); 3993 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval); 3994 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF); 3995 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF); 3996 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF); 3997 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF); 3998 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF); 3999 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF); 4000 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF); 4001 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF); 4002 } 4003 break; 4004 4005 default: 4006 // Illegal typecode 4007 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode"); 4008 } 4009 } 4010JVM_END 4011 4012 4013// Shared JNI/JVM entry points ////////////////////////////////////////////////////////////// 4014 4015jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) { 4016 // Security Note: 4017 // The Java level wrapper will perform the necessary security check allowing 4018 // us to pass the NULL as the initiating class loader. 4019 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL); 4020 4021 KlassHandle klass_handle(THREAD, klass); 4022 // Check if we should initialize the class 4023 if (init && klass_handle->oop_is_instance()) { 4024 klass_handle->initialize(CHECK_NULL); 4025 } 4026 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror()); 4027} 4028 4029 4030// Internal SQE debugging support /////////////////////////////////////////////////////////// 4031 4032#ifndef PRODUCT 4033 4034extern "C" { 4035 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get); 4036 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get); 4037 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj); 4038} 4039 4040JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get)) 4041 JVMWrapper("JVM_AccessBoolVMFlag"); 4042 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL); 4043JVM_END 4044 4045JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get)) 4046 JVMWrapper("JVM_AccessVMIntFlag"); 4047 intx v; 4048 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL); 4049 *value = (jint)v; 4050 return result; 4051JVM_END 4052 4053 4054JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj)) 4055 JVMWrapper("JVM_VMBreakPoint"); 4056 oop the_obj = JNIHandles::resolve(obj); 4057 BREAKPOINT; 4058JVM_END 4059 4060 4061#endif 4062 4063 4064// Method /////////////////////////////////////////////////////////////////////////////////////////// 4065 4066JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0)) 4067 JVMWrapper("JVM_InvokeMethod"); 4068 Handle method_handle; 4069 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) { 4070 method_handle = Handle(THREAD, JNIHandles::resolve(method)); 4071 Handle receiver(THREAD, JNIHandles::resolve(obj)); 4072 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); 4073 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL); 4074 jobject res = JNIHandles::make_local(env, result); 4075 if (JvmtiExport::should_post_vm_object_alloc()) { 4076 oop ret_type = java_lang_reflect_Method::return_type(method_handle()); 4077 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!"); 4078 if (java_lang_Class::is_primitive(ret_type)) { 4079 // Only for primitive type vm allocates memory for java object. 4080 // See box() method. 4081 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); 4082 } 4083 } 4084 return res; 4085 } else { 4086 THROW_0(vmSymbols::java_lang_StackOverflowError()); 4087 } 4088JVM_END 4089 4090 4091JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0)) 4092 JVMWrapper("JVM_NewInstanceFromConstructor"); 4093 oop constructor_mirror = JNIHandles::resolve(c); 4094 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); 4095 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL); 4096 jobject res = JNIHandles::make_local(env, result); 4097 if (JvmtiExport::should_post_vm_object_alloc()) { 4098 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); 4099 } 4100 return res; 4101JVM_END 4102 4103// Atomic /////////////////////////////////////////////////////////////////////////////////////////// 4104 4105JVM_LEAF(jboolean, JVM_SupportsCX8()) 4106 JVMWrapper("JVM_SupportsCX8"); 4107 return VM_Version::supports_cx8(); 4108JVM_END 4109 4110 4111JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal)) 4112 JVMWrapper("JVM_CX8Field"); 4113 jlong res; 4114 oop o = JNIHandles::resolve(obj); 4115 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); 4116 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs); 4117 4118 assert(VM_Version::supports_cx8(), "cx8 not supported"); 4119 res = Atomic::cmpxchg(newVal, addr, oldVal); 4120 4121 return res == oldVal; 4122JVM_END 4123 4124// DTrace /////////////////////////////////////////////////////////////////// 4125 4126JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env)) 4127 JVMWrapper("JVM_DTraceGetVersion"); 4128 return (jint)JVM_TRACING_DTRACE_VERSION; 4129JVM_END 4130 4131JVM_ENTRY(jlong,JVM_DTraceActivate( 4132 JNIEnv* env, jint version, jstring module_name, jint providers_count, 4133 JVM_DTraceProvider* providers)) 4134 JVMWrapper("JVM_DTraceActivate"); 4135 return DTraceJSDT::activate( 4136 version, module_name, providers_count, providers, CHECK_0); 4137JVM_END 4138 4139JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method)) 4140 JVMWrapper("JVM_DTraceIsProbeEnabled"); 4141 return DTraceJSDT::is_probe_enabled(method); 4142JVM_END 4143 4144JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle)) 4145 JVMWrapper("JVM_DTraceDispose"); 4146 DTraceJSDT::dispose(handle); 4147JVM_END 4148 4149JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env)) 4150 JVMWrapper("JVM_DTraceIsSupported"); 4151 return DTraceJSDT::is_supported(); 4152JVM_END 4153 4154// Returns an array of all live Thread objects (VM internal JavaThreads, 4155// jvmti agent threads, and JNI attaching threads are skipped) 4156// See CR 6404306 regarding JNI attaching threads 4157JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy)) 4158 ResourceMark rm(THREAD); 4159 ThreadsListEnumerator tle(THREAD, false, false); 4160 JvmtiVMObjectAllocEventCollector oam; 4161 4162 int num_threads = tle.num_threads(); 4163 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL); 4164 objArrayHandle threads_ah(THREAD, r); 4165 4166 for (int i = 0; i < num_threads; i++) { 4167 Handle h = tle.get_threadObj(i); 4168 threads_ah->obj_at_put(i, h()); 4169 } 4170 4171 return (jobjectArray) JNIHandles::make_local(env, threads_ah()); 4172JVM_END 4173 4174 4175// Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods 4176// Return StackTraceElement[][], each element is the stack trace of a thread in 4177// the corresponding entry in the given threads array 4178JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads)) 4179 JVMWrapper("JVM_DumpThreads"); 4180 JvmtiVMObjectAllocEventCollector oam; 4181 4182 // Check if threads is null 4183 if (threads == NULL) { 4184 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 4185 } 4186 4187 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads)); 4188 objArrayHandle ah(THREAD, a); 4189 int num_threads = ah->length(); 4190 // check if threads is non-empty array 4191 if (num_threads == 0) { 4192 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); 4193 } 4194 4195 // check if threads is not an array of objects of Thread class 4196 Klass* k = objArrayKlass::cast(ah->klass())->element_klass(); 4197 if (k != SystemDictionary::Thread_klass()) { 4198 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); 4199 } 4200 4201 ResourceMark rm(THREAD); 4202 4203 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); 4204 for (int i = 0; i < num_threads; i++) { 4205 oop thread_obj = ah->obj_at(i); 4206 instanceHandle h(THREAD, (instanceOop) thread_obj); 4207 thread_handle_array->append(h); 4208 } 4209 4210 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL); 4211 return (jobjectArray)JNIHandles::make_local(env, stacktraces()); 4212 4213JVM_END 4214 4215// JVM monitoring and management support 4216JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version)) 4217 return Management::get_jmm_interface(version); 4218JVM_END 4219 4220// com.sun.tools.attach.VirtualMachine agent properties support 4221// 4222// Initialize the agent properties with the properties maintained in the VM 4223JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties)) 4224 JVMWrapper("JVM_InitAgentProperties"); 4225 ResourceMark rm; 4226 4227 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); 4228 4229 PUTPROP(props, "sun.java.command", Arguments::java_command()); 4230 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags()); 4231 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args()); 4232 return properties; 4233JVM_END 4234 4235JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass)) 4236{ 4237 JVMWrapper("JVM_GetEnclosingMethodInfo"); 4238 JvmtiVMObjectAllocEventCollector oam; 4239 4240 if (ofClass == NULL) { 4241 return NULL; 4242 } 4243 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass)); 4244 // Special handling for primitive objects 4245 if (java_lang_Class::is_primitive(mirror())) { 4246 return NULL; 4247 } 4248 Klass* k = java_lang_Class::as_Klass(mirror()); 4249 if (!Klass::cast(k)->oop_is_instance()) { 4250 return NULL; 4251 } 4252 instanceKlassHandle ik_h(THREAD, k); 4253 int encl_method_class_idx = ik_h->enclosing_method_class_index(); 4254 if (encl_method_class_idx == 0) { 4255 return NULL; 4256 } 4257 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL); 4258 objArrayHandle dest(THREAD, dest_o); 4259 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL); 4260 dest->obj_at_put(0, Klass::cast(enc_k)->java_mirror()); 4261 int encl_method_method_idx = ik_h->enclosing_method_method_index(); 4262 if (encl_method_method_idx != 0) { 4263 Symbol* sym = ik_h->constants()->symbol_at( 4264 extract_low_short_from_int( 4265 ik_h->constants()->name_and_type_at(encl_method_method_idx))); 4266 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 4267 dest->obj_at_put(1, str()); 4268 sym = ik_h->constants()->symbol_at( 4269 extract_high_short_from_int( 4270 ik_h->constants()->name_and_type_at(encl_method_method_idx))); 4271 str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 4272 dest->obj_at_put(2, str()); 4273 } 4274 return (jobjectArray) JNIHandles::make_local(dest()); 4275} 4276JVM_END 4277 4278JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env, 4279 jint javaThreadState)) 4280{ 4281 // If new thread states are added in future JDK and VM versions, 4282 // this should check if the JDK version is compatible with thread 4283 // states supported by the VM. Return NULL if not compatible. 4284 // 4285 // This function must map the VM java_lang_Thread::ThreadStatus 4286 // to the Java thread state that the JDK supports. 4287 // 4288 4289 typeArrayHandle values_h; 4290 switch (javaThreadState) { 4291 case JAVA_THREAD_STATE_NEW : { 4292 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4293 values_h = typeArrayHandle(THREAD, r); 4294 values_h->int_at_put(0, java_lang_Thread::NEW); 4295 break; 4296 } 4297 case JAVA_THREAD_STATE_RUNNABLE : { 4298 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4299 values_h = typeArrayHandle(THREAD, r); 4300 values_h->int_at_put(0, java_lang_Thread::RUNNABLE); 4301 break; 4302 } 4303 case JAVA_THREAD_STATE_BLOCKED : { 4304 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4305 values_h = typeArrayHandle(THREAD, r); 4306 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER); 4307 break; 4308 } 4309 case JAVA_THREAD_STATE_WAITING : { 4310 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL); 4311 values_h = typeArrayHandle(THREAD, r); 4312 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT); 4313 values_h->int_at_put(1, java_lang_Thread::PARKED); 4314 break; 4315 } 4316 case JAVA_THREAD_STATE_TIMED_WAITING : { 4317 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL); 4318 values_h = typeArrayHandle(THREAD, r); 4319 values_h->int_at_put(0, java_lang_Thread::SLEEPING); 4320 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED); 4321 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED); 4322 break; 4323 } 4324 case JAVA_THREAD_STATE_TERMINATED : { 4325 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4326 values_h = typeArrayHandle(THREAD, r); 4327 values_h->int_at_put(0, java_lang_Thread::TERMINATED); 4328 break; 4329 } 4330 default: 4331 // Unknown state - probably incompatible JDK version 4332 return NULL; 4333 } 4334 4335 return (jintArray) JNIHandles::make_local(env, values_h()); 4336} 4337JVM_END 4338 4339 4340JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env, 4341 jint javaThreadState, 4342 jintArray values)) 4343{ 4344 // If new thread states are added in future JDK and VM versions, 4345 // this should check if the JDK version is compatible with thread 4346 // states supported by the VM. Return NULL if not compatible. 4347 // 4348 // This function must map the VM java_lang_Thread::ThreadStatus 4349 // to the Java thread state that the JDK supports. 4350 // 4351 4352 ResourceMark rm; 4353 4354 // Check if threads is null 4355 if (values == NULL) { 4356 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 4357 } 4358 4359 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values)); 4360 typeArrayHandle values_h(THREAD, v); 4361 4362 objArrayHandle names_h; 4363 switch (javaThreadState) { 4364 case JAVA_THREAD_STATE_NEW : { 4365 assert(values_h->length() == 1 && 4366 values_h->int_at(0) == java_lang_Thread::NEW, 4367 "Invalid threadStatus value"); 4368 4369 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4370 1, /* only 1 substate */ 4371 CHECK_NULL); 4372 names_h = objArrayHandle(THREAD, r); 4373 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL); 4374 names_h->obj_at_put(0, name()); 4375 break; 4376 } 4377 case JAVA_THREAD_STATE_RUNNABLE : { 4378 assert(values_h->length() == 1 && 4379 values_h->int_at(0) == java_lang_Thread::RUNNABLE, 4380 "Invalid threadStatus value"); 4381 4382 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4383 1, /* only 1 substate */ 4384 CHECK_NULL); 4385 names_h = objArrayHandle(THREAD, r); 4386 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL); 4387 names_h->obj_at_put(0, name()); 4388 break; 4389 } 4390 case JAVA_THREAD_STATE_BLOCKED : { 4391 assert(values_h->length() == 1 && 4392 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER, 4393 "Invalid threadStatus value"); 4394 4395 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4396 1, /* only 1 substate */ 4397 CHECK_NULL); 4398 names_h = objArrayHandle(THREAD, r); 4399 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL); 4400 names_h->obj_at_put(0, name()); 4401 break; 4402 } 4403 case JAVA_THREAD_STATE_WAITING : { 4404 assert(values_h->length() == 2 && 4405 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT && 4406 values_h->int_at(1) == java_lang_Thread::PARKED, 4407 "Invalid threadStatus value"); 4408 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4409 2, /* number of substates */ 4410 CHECK_NULL); 4411 names_h = objArrayHandle(THREAD, r); 4412 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT", 4413 CHECK_NULL); 4414 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED", 4415 CHECK_NULL); 4416 names_h->obj_at_put(0, name0()); 4417 names_h->obj_at_put(1, name1()); 4418 break; 4419 } 4420 case JAVA_THREAD_STATE_TIMED_WAITING : { 4421 assert(values_h->length() == 3 && 4422 values_h->int_at(0) == java_lang_Thread::SLEEPING && 4423 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED && 4424 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED, 4425 "Invalid threadStatus value"); 4426 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4427 3, /* number of substates */ 4428 CHECK_NULL); 4429 names_h = objArrayHandle(THREAD, r); 4430 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING", 4431 CHECK_NULL); 4432 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT", 4433 CHECK_NULL); 4434 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED", 4435 CHECK_NULL); 4436 names_h->obj_at_put(0, name0()); 4437 names_h->obj_at_put(1, name1()); 4438 names_h->obj_at_put(2, name2()); 4439 break; 4440 } 4441 case JAVA_THREAD_STATE_TERMINATED : { 4442 assert(values_h->length() == 1 && 4443 values_h->int_at(0) == java_lang_Thread::TERMINATED, 4444 "Invalid threadStatus value"); 4445 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4446 1, /* only 1 substate */ 4447 CHECK_NULL); 4448 names_h = objArrayHandle(THREAD, r); 4449 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL); 4450 names_h->obj_at_put(0, name()); 4451 break; 4452 } 4453 default: 4454 // Unknown state - probably incompatible JDK version 4455 return NULL; 4456 } 4457 return (jobjectArray) JNIHandles::make_local(env, names_h()); 4458} 4459JVM_END 4460 4461JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size)) 4462{ 4463 memset(info, 0, sizeof(info_size)); 4464 4465 info->jvm_version = Abstract_VM_Version::jvm_version(); 4466 info->update_version = 0; /* 0 in HotSpot Express VM */ 4467 info->special_update_version = 0; /* 0 in HotSpot Express VM */ 4468 4469 // when we add a new capability in the jvm_version_info struct, we should also 4470 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat 4471 // counter defined in runtimeService.cpp. 4472 info->is_attachable = AttachListener::is_attach_supported(); 4473#ifdef KERNEL 4474 info->is_kernel_jvm = 1; // true; 4475#else // KERNEL 4476 info->is_kernel_jvm = 0; // false; 4477#endif // KERNEL 4478} 4479JVM_END 4480