jvm.cpp revision 4802:f2110083203d
1/* 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25#include "precompiled.hpp" 26#include "classfile/classLoader.hpp" 27#include "classfile/javaAssertions.hpp" 28#include "classfile/javaClasses.hpp" 29#include "classfile/symbolTable.hpp" 30#include "classfile/systemDictionary.hpp" 31#include "classfile/vmSymbols.hpp" 32#include "gc_interface/collectedHeap.inline.hpp" 33#include "interpreter/bytecode.hpp" 34#include "memory/oopFactory.hpp" 35#include "memory/universe.inline.hpp" 36#include "oops/fieldStreams.hpp" 37#include "oops/instanceKlass.hpp" 38#include "oops/objArrayKlass.hpp" 39#include "oops/method.hpp" 40#include "prims/jvm.h" 41#include "prims/jvm_misc.hpp" 42#include "prims/jvmtiExport.hpp" 43#include "prims/jvmtiThreadState.hpp" 44#include "prims/nativeLookup.hpp" 45#include "prims/privilegedStack.hpp" 46#include "runtime/arguments.hpp" 47#include "runtime/dtraceJSDT.hpp" 48#include "runtime/handles.inline.hpp" 49#include "runtime/init.hpp" 50#include "runtime/interfaceSupport.hpp" 51#include "runtime/java.hpp" 52#include "runtime/javaCalls.hpp" 53#include "runtime/jfieldIDWorkaround.hpp" 54#include "runtime/os.hpp" 55#include "runtime/perfData.hpp" 56#include "runtime/reflection.hpp" 57#include "runtime/vframe.hpp" 58#include "runtime/vm_operations.hpp" 59#include "services/attachListener.hpp" 60#include "services/management.hpp" 61#include "services/threadService.hpp" 62#include "trace/tracing.hpp" 63#include "utilities/copy.hpp" 64#include "utilities/defaultStream.hpp" 65#include "utilities/dtrace.hpp" 66#include "utilities/events.hpp" 67#include "utilities/histogram.hpp" 68#include "utilities/top.hpp" 69#include "utilities/utf8.hpp" 70#ifdef TARGET_OS_FAMILY_linux 71# include "jvm_linux.h" 72#endif 73#ifdef TARGET_OS_FAMILY_solaris 74# include "jvm_solaris.h" 75#endif 76#ifdef TARGET_OS_FAMILY_windows 77# include "jvm_windows.h" 78#endif 79#ifdef TARGET_OS_FAMILY_bsd 80# include "jvm_bsd.h" 81#endif 82 83#include <errno.h> 84 85#ifndef USDT2 86HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long); 87HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int); 88HS_DTRACE_PROBE_DECL0(hotspot, thread__yield); 89#endif /* !USDT2 */ 90 91/* 92 NOTE about use of any ctor or function call that can trigger a safepoint/GC: 93 such ctors and calls MUST NOT come between an oop declaration/init and its 94 usage because if objects are move this may cause various memory stomps, bus 95 errors and segfaults. Here is a cookbook for causing so called "naked oop 96 failures": 97 98 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> { 99 JVMWrapper("JVM_GetClassDeclaredFields"); 100 101 // Object address to be held directly in mirror & not visible to GC 102 oop mirror = JNIHandles::resolve_non_null(ofClass); 103 104 // If this ctor can hit a safepoint, moving objects around, then 105 ComplexConstructor foo; 106 107 // Boom! mirror may point to JUNK instead of the intended object 108 (some dereference of mirror) 109 110 // Here's another call that may block for GC, making mirror stale 111 MutexLocker ml(some_lock); 112 113 // And here's an initializer that can result in a stale oop 114 // all in one step. 115 oop o = call_that_can_throw_exception(TRAPS); 116 117 118 The solution is to keep the oop declaration BELOW the ctor or function 119 call that might cause a GC, do another resolve to reassign the oop, or 120 consider use of a Handle instead of an oop so there is immunity from object 121 motion. But note that the "QUICK" entries below do not have a handlemark 122 and thus can only support use of handles passed in. 123*/ 124 125static void trace_class_resolution_impl(Klass* to_class, TRAPS) { 126 ResourceMark rm; 127 int line_number = -1; 128 const char * source_file = NULL; 129 const char * trace = "explicit"; 130 InstanceKlass* caller = NULL; 131 JavaThread* jthread = JavaThread::current(); 132 if (jthread->has_last_Java_frame()) { 133 vframeStream vfst(jthread); 134 135 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames 136 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK); 137 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK); 138 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK); 139 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK); 140 141 Method* last_caller = NULL; 142 143 while (!vfst.at_end()) { 144 Method* m = vfst.method(); 145 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&& 146 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) && 147 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) { 148 break; 149 } 150 last_caller = m; 151 vfst.next(); 152 } 153 // if this is called from Class.forName0 and that is called from Class.forName, 154 // then print the caller of Class.forName. If this is Class.loadClass, then print 155 // that caller, otherwise keep quiet since this should be picked up elsewhere. 156 bool found_it = false; 157 if (!vfst.at_end() && 158 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() && 159 vfst.method()->name() == vmSymbols::forName0_name()) { 160 vfst.next(); 161 if (!vfst.at_end() && 162 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() && 163 vfst.method()->name() == vmSymbols::forName_name()) { 164 vfst.next(); 165 found_it = true; 166 } 167 } else if (last_caller != NULL && 168 last_caller->method_holder()->name() == 169 vmSymbols::java_lang_ClassLoader() && 170 (last_caller->name() == vmSymbols::loadClassInternal_name() || 171 last_caller->name() == vmSymbols::loadClass_name())) { 172 found_it = true; 173 } else if (!vfst.at_end()) { 174 if (vfst.method()->is_native()) { 175 // JNI call 176 found_it = true; 177 } 178 } 179 if (found_it && !vfst.at_end()) { 180 // found the caller 181 caller = vfst.method()->method_holder(); 182 line_number = vfst.method()->line_number_from_bci(vfst.bci()); 183 if (line_number == -1) { 184 // show method name if it's a native method 185 trace = vfst.method()->name_and_sig_as_C_string(); 186 } 187 Symbol* s = caller->source_file_name(); 188 if (s != NULL) { 189 source_file = s->as_C_string(); 190 } 191 } 192 } 193 if (caller != NULL) { 194 if (to_class != caller) { 195 const char * from = caller->external_name(); 196 const char * to = to_class->external_name(); 197 // print in a single call to reduce interleaving between threads 198 if (source_file != NULL) { 199 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace); 200 } else { 201 tty->print("RESOLVE %s %s (%s)\n", from, to, trace); 202 } 203 } 204 } 205} 206 207void trace_class_resolution(Klass* to_class) { 208 EXCEPTION_MARK; 209 trace_class_resolution_impl(to_class, THREAD); 210 if (HAS_PENDING_EXCEPTION) { 211 CLEAR_PENDING_EXCEPTION; 212 } 213} 214 215// Wrapper to trace JVM functions 216 217#ifdef ASSERT 218 class JVMTraceWrapper : public StackObj { 219 public: 220 JVMTraceWrapper(const char* format, ...) { 221 if (TraceJVMCalls) { 222 va_list ap; 223 va_start(ap, format); 224 tty->print("JVM "); 225 tty->vprint_cr(format, ap); 226 va_end(ap); 227 } 228 } 229 }; 230 231 Histogram* JVMHistogram; 232 volatile jint JVMHistogram_lock = 0; 233 234 class JVMHistogramElement : public HistogramElement { 235 public: 236 JVMHistogramElement(const char* name); 237 }; 238 239 JVMHistogramElement::JVMHistogramElement(const char* elementName) { 240 _name = elementName; 241 uintx count = 0; 242 243 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) { 244 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) { 245 count +=1; 246 if ( (WarnOnStalledSpinLock > 0) 247 && (count % WarnOnStalledSpinLock == 0)) { 248 warning("JVMHistogram_lock seems to be stalled"); 249 } 250 } 251 } 252 253 if(JVMHistogram == NULL) 254 JVMHistogram = new Histogram("JVM Call Counts",100); 255 256 JVMHistogram->add_element(this); 257 Atomic::dec(&JVMHistogram_lock); 258 } 259 260 #define JVMCountWrapper(arg) \ 261 static JVMHistogramElement* e = new JVMHistogramElement(arg); \ 262 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen! 263 264 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1) 265 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2) 266 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3) 267 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4) 268#else 269 #define JVMWrapper(arg1) 270 #define JVMWrapper2(arg1, arg2) 271 #define JVMWrapper3(arg1, arg2, arg3) 272 #define JVMWrapper4(arg1, arg2, arg3, arg4) 273#endif 274 275 276// Interface version ///////////////////////////////////////////////////////////////////// 277 278 279JVM_LEAF(jint, JVM_GetInterfaceVersion()) 280 return JVM_INTERFACE_VERSION; 281JVM_END 282 283 284// java.lang.System ////////////////////////////////////////////////////////////////////// 285 286 287JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored)) 288 JVMWrapper("JVM_CurrentTimeMillis"); 289 return os::javaTimeMillis(); 290JVM_END 291 292JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored)) 293 JVMWrapper("JVM_NanoTime"); 294 return os::javaTimeNanos(); 295JVM_END 296 297 298JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos, 299 jobject dst, jint dst_pos, jint length)) 300 JVMWrapper("JVM_ArrayCopy"); 301 // Check if we have null pointers 302 if (src == NULL || dst == NULL) { 303 THROW(vmSymbols::java_lang_NullPointerException()); 304 } 305 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src)); 306 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst)); 307 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop"); 308 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop"); 309 // Do copy 310 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread); 311JVM_END 312 313 314static void set_property(Handle props, const char* key, const char* value, TRAPS) { 315 JavaValue r(T_OBJECT); 316 // public synchronized Object put(Object key, Object value); 317 HandleMark hm(THREAD); 318 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK); 319 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK); 320 JavaCalls::call_virtual(&r, 321 props, 322 KlassHandle(THREAD, SystemDictionary::Properties_klass()), 323 vmSymbols::put_name(), 324 vmSymbols::object_object_object_signature(), 325 key_str, 326 value_str, 327 THREAD); 328} 329 330 331#define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties)); 332 333 334JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties)) 335 JVMWrapper("JVM_InitProperties"); 336 ResourceMark rm; 337 338 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); 339 340 // System property list includes both user set via -D option and 341 // jvm system specific properties. 342 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { 343 PUTPROP(props, p->key(), p->value()); 344 } 345 346 // Convert the -XX:MaxDirectMemorySize= command line flag 347 // to the sun.nio.MaxDirectMemorySize property. 348 // Do this after setting user properties to prevent people 349 // from setting the value with a -D option, as requested. 350 { 351 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) { 352 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1"); 353 } else { 354 char as_chars[256]; 355 jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize); 356 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars); 357 } 358 } 359 360 // JVM monitoring and management support 361 // Add the sun.management.compiler property for the compiler's name 362 { 363#undef CSIZE 364#if defined(_LP64) || defined(_WIN64) 365 #define CSIZE "64-Bit " 366#else 367 #define CSIZE 368#endif // 64bit 369 370#ifdef TIERED 371 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers"; 372#else 373#if defined(COMPILER1) 374 const char* compiler_name = "HotSpot " CSIZE "Client Compiler"; 375#elif defined(COMPILER2) 376 const char* compiler_name = "HotSpot " CSIZE "Server Compiler"; 377#else 378 const char* compiler_name = ""; 379#endif // compilers 380#endif // TIERED 381 382 if (*compiler_name != '\0' && 383 (Arguments::mode() != Arguments::_int)) { 384 PUTPROP(props, "sun.management.compiler", compiler_name); 385 } 386 } 387 388 return properties; 389JVM_END 390 391 392// java.lang.Runtime ///////////////////////////////////////////////////////////////////////// 393 394extern volatile jint vm_created; 395 396JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code)) 397 if (vm_created != 0 && (code == 0)) { 398 // The VM is about to exit. We call back into Java to check whether finalizers should be run 399 Universe::run_finalizers_on_exit(); 400 } 401 before_exit(thread); 402 vm_exit(code); 403JVM_END 404 405 406JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code)) 407 before_exit(thread); 408 vm_exit(code); 409JVM_END 410 411 412JVM_LEAF(void, JVM_OnExit(void (*func)(void))) 413 register_on_exit_function(func); 414JVM_END 415 416 417JVM_ENTRY_NO_ENV(void, JVM_GC(void)) 418 JVMWrapper("JVM_GC"); 419 if (!DisableExplicitGC) { 420 Universe::heap()->collect(GCCause::_java_lang_system_gc); 421 } 422JVM_END 423 424 425JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void)) 426 JVMWrapper("JVM_MaxObjectInspectionAge"); 427 return Universe::heap()->millis_since_last_gc(); 428JVM_END 429 430 431JVM_LEAF(void, JVM_TraceInstructions(jboolean on)) 432 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported"); 433JVM_END 434 435 436JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on)) 437 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported"); 438JVM_END 439 440static inline jlong convert_size_t_to_jlong(size_t val) { 441 // In the 64-bit vm, a size_t can overflow a jlong (which is signed). 442 NOT_LP64 (return (jlong)val;) 443 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);) 444} 445 446JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void)) 447 JVMWrapper("JVM_TotalMemory"); 448 size_t n = Universe::heap()->capacity(); 449 return convert_size_t_to_jlong(n); 450JVM_END 451 452 453JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void)) 454 JVMWrapper("JVM_FreeMemory"); 455 CollectedHeap* ch = Universe::heap(); 456 size_t n; 457 { 458 MutexLocker x(Heap_lock); 459 n = ch->capacity() - ch->used(); 460 } 461 return convert_size_t_to_jlong(n); 462JVM_END 463 464 465JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void)) 466 JVMWrapper("JVM_MaxMemory"); 467 size_t n = Universe::heap()->max_capacity(); 468 return convert_size_t_to_jlong(n); 469JVM_END 470 471 472JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void)) 473 JVMWrapper("JVM_ActiveProcessorCount"); 474 return os::active_processor_count(); 475JVM_END 476 477 478 479// java.lang.Throwable ////////////////////////////////////////////////////// 480 481 482JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver)) 483 JVMWrapper("JVM_FillInStackTrace"); 484 Handle exception(thread, JNIHandles::resolve_non_null(receiver)); 485 java_lang_Throwable::fill_in_stack_trace(exception); 486JVM_END 487 488 489JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable)) 490 JVMWrapper("JVM_GetStackTraceDepth"); 491 oop exception = JNIHandles::resolve(throwable); 492 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD); 493JVM_END 494 495 496JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index)) 497 JVMWrapper("JVM_GetStackTraceElement"); 498 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC 499 oop exception = JNIHandles::resolve(throwable); 500 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL); 501 return JNIHandles::make_local(env, element); 502JVM_END 503 504 505// java.lang.Object /////////////////////////////////////////////// 506 507 508JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle)) 509 JVMWrapper("JVM_IHashCode"); 510 // as implemented in the classic virtual machine; return 0 if object is NULL 511 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ; 512JVM_END 513 514 515JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms)) 516 JVMWrapper("JVM_MonitorWait"); 517 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 518 JavaThreadInObjectWaitState jtiows(thread, ms != 0); 519 if (JvmtiExport::should_post_monitor_wait()) { 520 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms); 521 } 522 ObjectSynchronizer::wait(obj, ms, CHECK); 523JVM_END 524 525 526JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle)) 527 JVMWrapper("JVM_MonitorNotify"); 528 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 529 ObjectSynchronizer::notify(obj, CHECK); 530JVM_END 531 532 533JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle)) 534 JVMWrapper("JVM_MonitorNotifyAll"); 535 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 536 ObjectSynchronizer::notifyall(obj, CHECK); 537JVM_END 538 539 540JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle)) 541 JVMWrapper("JVM_Clone"); 542 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 543 const KlassHandle klass (THREAD, obj->klass()); 544 JvmtiVMObjectAllocEventCollector oam; 545 546#ifdef ASSERT 547 // Just checking that the cloneable flag is set correct 548 if (obj->is_array()) { 549 guarantee(klass->is_cloneable(), "all arrays are cloneable"); 550 } else { 551 guarantee(obj->is_instance(), "should be instanceOop"); 552 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass()); 553 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag"); 554 } 555#endif 556 557 // Check if class of obj supports the Cloneable interface. 558 // All arrays are considered to be cloneable (See JLS 20.1.5) 559 if (!klass->is_cloneable()) { 560 ResourceMark rm(THREAD); 561 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name()); 562 } 563 564 // Make shallow object copy 565 const int size = obj->size(); 566 oop new_obj = NULL; 567 if (obj->is_array()) { 568 const int length = ((arrayOop)obj())->length(); 569 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL); 570 } else { 571 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL); 572 } 573 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread 574 // is modifying a reference field in the clonee, a non-oop-atomic copy might 575 // be suspended in the middle of copying the pointer and end up with parts 576 // of two different pointers in the field. Subsequent dereferences will crash. 577 // 4846409: an oop-copy of objects with long or double fields or arrays of same 578 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead 579 // of oops. We know objects are aligned on a minimum of an jlong boundary. 580 // The same is true of StubRoutines::object_copy and the various oop_copy 581 // variants, and of the code generated by the inline_native_clone intrinsic. 582 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned"); 583 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj, 584 (size_t)align_object_size(size) / HeapWordsPerLong); 585 // Clear the header 586 new_obj->init_mark(); 587 588 // Store check (mark entire object and let gc sort it out) 589 BarrierSet* bs = Universe::heap()->barrier_set(); 590 assert(bs->has_write_region_opt(), "Barrier set does not have write_region"); 591 bs->write_region(MemRegion((HeapWord*)new_obj, size)); 592 593 // Caution: this involves a java upcall, so the clone should be 594 // "gc-robust" by this stage. 595 if (klass->has_finalizer()) { 596 assert(obj->is_instance(), "should be instanceOop"); 597 new_obj = InstanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL); 598 } 599 600 return JNIHandles::make_local(env, oop(new_obj)); 601JVM_END 602 603// java.lang.Compiler //////////////////////////////////////////////////// 604 605// The initial cuts of the HotSpot VM will not support JITs, and all existing 606// JITs would need extensive changes to work with HotSpot. The JIT-related JVM 607// functions are all silently ignored unless JVM warnings are printed. 608 609JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls)) 610 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported"); 611JVM_END 612 613 614JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls)) 615 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported"); 616 return JNI_FALSE; 617JVM_END 618 619 620JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls)) 621 if (PrintJVMWarnings) warning("JVM_CompileClass not supported"); 622 return JNI_FALSE; 623JVM_END 624 625 626JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname)) 627 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported"); 628 return JNI_FALSE; 629JVM_END 630 631 632JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg)) 633 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported"); 634 return NULL; 635JVM_END 636 637 638JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls)) 639 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported"); 640JVM_END 641 642 643JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls)) 644 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported"); 645JVM_END 646 647 648 649// Error message support ////////////////////////////////////////////////////// 650 651JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len)) 652 JVMWrapper("JVM_GetLastErrorString"); 653 return (jint)os::lasterror(buf, len); 654JVM_END 655 656 657// java.io.File /////////////////////////////////////////////////////////////// 658 659JVM_LEAF(char*, JVM_NativePath(char* path)) 660 JVMWrapper2("JVM_NativePath (%s)", path); 661 return os::native_path(path); 662JVM_END 663 664 665// Misc. class handling /////////////////////////////////////////////////////////// 666 667 668JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth)) 669 JVMWrapper("JVM_GetCallerClass"); 670 671 // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation. 672 if (SystemDictionary::reflect_CallerSensitive_klass() == NULL) { 673 Klass* k = thread->security_get_caller_class(depth); 674 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror()); 675 } else { 676 // Basic handshaking with Java_sun_reflect_Reflection_getCallerClass 677 assert(depth == -1, "wrong handshake depth"); 678 } 679 680 // Getting the class of the caller frame. 681 // 682 // The call stack at this point looks something like this: 683 // 684 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ] 685 // [1] [ @CallerSensitive API.method ] 686 // [.] [ (skipped intermediate frames) ] 687 // [n] [ caller ] 688 vframeStream vfst(thread); 689 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass 690 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) { 691 Method* m = vfst.method(); 692 assert(m != NULL, "sanity"); 693 switch (n) { 694 case 0: 695 // This must only be called from Reflection.getCallerClass 696 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) { 697 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass"); 698 } 699 // fall-through 700 case 1: 701 // Frame 0 and 1 must be caller sensitive. 702 if (!m->caller_sensitive()) { 703 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n)); 704 } 705 break; 706 default: 707 if (!m->is_ignored_by_security_stack_walk()) { 708 // We have reached the desired frame; return the holder class. 709 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror()); 710 } 711 break; 712 } 713 } 714 return NULL; 715JVM_END 716 717 718JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf)) 719 JVMWrapper("JVM_FindPrimitiveClass"); 720 oop mirror = NULL; 721 BasicType t = name2type(utf); 722 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) { 723 mirror = Universe::java_mirror(t); 724 } 725 if (mirror == NULL) { 726 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf); 727 } else { 728 return (jclass) JNIHandles::make_local(env, mirror); 729 } 730JVM_END 731 732 733JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls)) 734 JVMWrapper("JVM_ResolveClass"); 735 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented"); 736JVM_END 737 738 739// Returns a class loaded by the bootstrap class loader; or null 740// if not found. ClassNotFoundException is not thrown. 741// 742// Rationale behind JVM_FindClassFromBootLoader 743// a> JVM_FindClassFromClassLoader was never exported in the export tables. 744// b> because of (a) java.dll has a direct dependecy on the unexported 745// private symbol "_JVM_FindClassFromClassLoader@20". 746// c> the launcher cannot use the private symbol as it dynamically opens 747// the entry point, so if something changes, the launcher will fail 748// unexpectedly at runtime, it is safest for the launcher to dlopen a 749// stable exported interface. 750// d> re-exporting JVM_FindClassFromClassLoader as public, will cause its 751// signature to change from _JVM_FindClassFromClassLoader@20 to 752// JVM_FindClassFromClassLoader and will not be backward compatible 753// with older JDKs. 754// Thus a public/stable exported entry point is the right solution, 755// public here means public in linker semantics, and is exported only 756// to the JDK, and is not intended to be a public API. 757 758JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env, 759 const char* name)) 760 JVMWrapper2("JVM_FindClassFromBootLoader %s", name); 761 762 // Java libraries should ensure that name is never null... 763 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 764 // It's impossible to create this class; the name cannot fit 765 // into the constant pool. 766 return NULL; 767 } 768 769 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); 770 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL); 771 if (k == NULL) { 772 return NULL; 773 } 774 775 if (TraceClassResolution) { 776 trace_class_resolution(k); 777 } 778 return (jclass) JNIHandles::make_local(env, k->java_mirror()); 779JVM_END 780 781JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name, 782 jboolean init, jobject loader, 783 jboolean throwError)) 784 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name, 785 throwError ? "error" : "exception"); 786 // Java libraries should ensure that name is never null... 787 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 788 // It's impossible to create this class; the name cannot fit 789 // into the constant pool. 790 if (throwError) { 791 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 792 } else { 793 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name); 794 } 795 } 796 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); 797 Handle h_loader(THREAD, JNIHandles::resolve(loader)); 798 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, 799 Handle(), throwError, THREAD); 800 801 if (TraceClassResolution && result != NULL) { 802 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 803 } 804 return result; 805JVM_END 806 807 808JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name, 809 jboolean init, jclass from)) 810 JVMWrapper2("JVM_FindClassFromClass %s", name); 811 if (name == NULL || (int)strlen(name) > Symbol::max_length()) { 812 // It's impossible to create this class; the name cannot fit 813 // into the constant pool. 814 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 815 } 816 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL); 817 oop from_class_oop = JNIHandles::resolve(from); 818 Klass* from_class = (from_class_oop == NULL) 819 ? (Klass*)NULL 820 : java_lang_Class::as_Klass(from_class_oop); 821 oop class_loader = NULL; 822 oop protection_domain = NULL; 823 if (from_class != NULL) { 824 class_loader = from_class->class_loader(); 825 protection_domain = from_class->protection_domain(); 826 } 827 Handle h_loader(THREAD, class_loader); 828 Handle h_prot (THREAD, protection_domain); 829 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, 830 h_prot, true, thread); 831 832 if (TraceClassResolution && result != NULL) { 833 // this function is generally only used for class loading during verification. 834 ResourceMark rm; 835 oop from_mirror = JNIHandles::resolve_non_null(from); 836 Klass* from_class = java_lang_Class::as_Klass(from_mirror); 837 const char * from_name = from_class->external_name(); 838 839 oop mirror = JNIHandles::resolve_non_null(result); 840 Klass* to_class = java_lang_Class::as_Klass(mirror); 841 const char * to = to_class->external_name(); 842 tty->print("RESOLVE %s %s (verification)\n", from_name, to); 843 } 844 845 return result; 846JVM_END 847 848static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) { 849 if (loader.is_null()) { 850 return; 851 } 852 853 // check whether the current caller thread holds the lock or not. 854 // If not, increment the corresponding counter 855 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) != 856 ObjectSynchronizer::owner_self) { 857 counter->inc(); 858 } 859} 860 861// common code for JVM_DefineClass() and JVM_DefineClassWithSource() 862// and JVM_DefineClassWithSourceCond() 863static jclass jvm_define_class_common(JNIEnv *env, const char *name, 864 jobject loader, const jbyte *buf, 865 jsize len, jobject pd, const char *source, 866 jboolean verify, TRAPS) { 867 if (source == NULL) source = "__JVM_DefineClass__"; 868 869 assert(THREAD->is_Java_thread(), "must be a JavaThread"); 870 JavaThread* jt = (JavaThread*) THREAD; 871 872 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(), 873 ClassLoader::perf_define_appclass_selftime(), 874 ClassLoader::perf_define_appclasses(), 875 jt->get_thread_stat()->perf_recursion_counts_addr(), 876 jt->get_thread_stat()->perf_timers_addr(), 877 PerfClassTraceTime::DEFINE_CLASS); 878 879 if (UsePerfData) { 880 ClassLoader::perf_app_classfile_bytes_read()->inc(len); 881 } 882 883 // Since exceptions can be thrown, class initialization can take place 884 // if name is NULL no check for class name in .class stream has to be made. 885 TempNewSymbol class_name = NULL; 886 if (name != NULL) { 887 const int str_len = (int)strlen(name); 888 if (str_len > Symbol::max_length()) { 889 // It's impossible to create this class; the name cannot fit 890 // into the constant pool. 891 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name); 892 } 893 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL); 894 } 895 896 ResourceMark rm(THREAD); 897 ClassFileStream st((u1*) buf, len, (char *)source); 898 Handle class_loader (THREAD, JNIHandles::resolve(loader)); 899 if (UsePerfData) { 900 is_lock_held_by_thread(class_loader, 901 ClassLoader::sync_JVMDefineClassLockFreeCounter(), 902 THREAD); 903 } 904 Handle protection_domain (THREAD, JNIHandles::resolve(pd)); 905 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader, 906 protection_domain, &st, 907 verify != 0, 908 CHECK_NULL); 909 910 if (TraceClassResolution && k != NULL) { 911 trace_class_resolution(k); 912 } 913 914 return (jclass) JNIHandles::make_local(env, k->java_mirror()); 915} 916 917 918JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd)) 919 JVMWrapper2("JVM_DefineClass %s", name); 920 921 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD); 922JVM_END 923 924 925JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source)) 926 JVMWrapper2("JVM_DefineClassWithSource %s", name); 927 928 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD); 929JVM_END 930 931JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name, 932 jobject loader, const jbyte *buf, 933 jsize len, jobject pd, 934 const char *source, jboolean verify)) 935 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name); 936 937 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD); 938JVM_END 939 940JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name)) 941 JVMWrapper("JVM_FindLoadedClass"); 942 ResourceMark rm(THREAD); 943 944 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); 945 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL); 946 947 const char* str = java_lang_String::as_utf8_string(string()); 948 // Sanity check, don't expect null 949 if (str == NULL) return NULL; 950 951 const int str_len = (int)strlen(str); 952 if (str_len > Symbol::max_length()) { 953 // It's impossible to create this class; the name cannot fit 954 // into the constant pool. 955 return NULL; 956 } 957 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL); 958 959 // Security Note: 960 // The Java level wrapper will perform the necessary security check allowing 961 // us to pass the NULL as the initiating class loader. 962 Handle h_loader(THREAD, JNIHandles::resolve(loader)); 963 if (UsePerfData) { 964 is_lock_held_by_thread(h_loader, 965 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(), 966 THREAD); 967 } 968 969 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name, 970 h_loader, 971 Handle(), 972 CHECK_NULL); 973 974 return (k == NULL) ? NULL : 975 (jclass) JNIHandles::make_local(env, k->java_mirror()); 976JVM_END 977 978 979// Reflection support ////////////////////////////////////////////////////////////////////////////// 980 981JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls)) 982 assert (cls != NULL, "illegal class"); 983 JVMWrapper("JVM_GetClassName"); 984 JvmtiVMObjectAllocEventCollector oam; 985 ResourceMark rm(THREAD); 986 const char* name; 987 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 988 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls))); 989 } else { 990 // Consider caching interned string in Klass 991 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 992 assert(k->is_klass(), "just checking"); 993 name = k->external_name(); 994 } 995 oop result = StringTable::intern((char*) name, CHECK_NULL); 996 return (jstring) JNIHandles::make_local(env, result); 997JVM_END 998 999 1000JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls)) 1001 JVMWrapper("JVM_GetClassInterfaces"); 1002 JvmtiVMObjectAllocEventCollector oam; 1003 oop mirror = JNIHandles::resolve_non_null(cls); 1004 1005 // Special handling for primitive objects 1006 if (java_lang_Class::is_primitive(mirror)) { 1007 // Primitive objects does not have any interfaces 1008 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1009 return (jobjectArray) JNIHandles::make_local(env, r); 1010 } 1011 1012 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror)); 1013 // Figure size of result array 1014 int size; 1015 if (klass->oop_is_instance()) { 1016 size = InstanceKlass::cast(klass())->local_interfaces()->length(); 1017 } else { 1018 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass"); 1019 size = 2; 1020 } 1021 1022 // Allocate result array 1023 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL); 1024 objArrayHandle result (THREAD, r); 1025 // Fill in result 1026 if (klass->oop_is_instance()) { 1027 // Regular instance klass, fill in all local interfaces 1028 for (int index = 0; index < size; index++) { 1029 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index); 1030 result->obj_at_put(index, k->java_mirror()); 1031 } 1032 } else { 1033 // All arrays implement java.lang.Cloneable and java.io.Serializable 1034 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror()); 1035 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror()); 1036 } 1037 return (jobjectArray) JNIHandles::make_local(env, result()); 1038JVM_END 1039 1040 1041JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls)) 1042 JVMWrapper("JVM_GetClassLoader"); 1043 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1044 return NULL; 1045 } 1046 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1047 oop loader = k->class_loader(); 1048 return JNIHandles::make_local(env, loader); 1049JVM_END 1050 1051 1052JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls)) 1053 JVMWrapper("JVM_IsInterface"); 1054 oop mirror = JNIHandles::resolve_non_null(cls); 1055 if (java_lang_Class::is_primitive(mirror)) { 1056 return JNI_FALSE; 1057 } 1058 Klass* k = java_lang_Class::as_Klass(mirror); 1059 jboolean result = k->is_interface(); 1060 assert(!result || k->oop_is_instance(), 1061 "all interfaces are instance types"); 1062 // The compiler intrinsic for isInterface tests the 1063 // Klass::_access_flags bits in the same way. 1064 return result; 1065JVM_END 1066 1067 1068JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls)) 1069 JVMWrapper("JVM_GetClassSigners"); 1070 JvmtiVMObjectAllocEventCollector oam; 1071 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1072 // There are no signers for primitive types 1073 return NULL; 1074 } 1075 1076 objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls)); 1077 1078 // If there are no signers set in the class, or if the class 1079 // is an array, return NULL. 1080 if (signers == NULL) return NULL; 1081 1082 // copy of the signers array 1083 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass(); 1084 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL); 1085 for (int index = 0; index < signers->length(); index++) { 1086 signers_copy->obj_at_put(index, signers->obj_at(index)); 1087 } 1088 1089 // return the copy 1090 return (jobjectArray) JNIHandles::make_local(env, signers_copy); 1091JVM_END 1092 1093 1094JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers)) 1095 JVMWrapper("JVM_SetClassSigners"); 1096 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1097 // This call is ignored for primitive types and arrays. 1098 // Signers are only set once, ClassLoader.java, and thus shouldn't 1099 // be called with an array. Only the bootstrap loader creates arrays. 1100 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1101 if (k->oop_is_instance()) { 1102 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers))); 1103 } 1104 } 1105JVM_END 1106 1107 1108JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls)) 1109 JVMWrapper("JVM_GetProtectionDomain"); 1110 if (JNIHandles::resolve(cls) == NULL) { 1111 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); 1112 } 1113 1114 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1115 // Primitive types does not have a protection domain. 1116 return NULL; 1117 } 1118 1119 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls)); 1120 return (jobject) JNIHandles::make_local(env, pd); 1121JVM_END 1122 1123 1124// Obsolete since 1.2 (Class.setProtectionDomain removed), although 1125// still defined in core libraries as of 1.5. 1126JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain)) 1127 JVMWrapper("JVM_SetProtectionDomain"); 1128 if (JNIHandles::resolve(cls) == NULL) { 1129 THROW(vmSymbols::java_lang_NullPointerException()); 1130 } 1131 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1132 // Call is ignored for primitive types 1133 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1134 1135 // cls won't be an array, as this called only from ClassLoader.defineClass 1136 if (k->oop_is_instance()) { 1137 oop pd = JNIHandles::resolve(protection_domain); 1138 assert(pd == NULL || pd->is_oop(), "just checking"); 1139 java_lang_Class::set_protection_domain(k->java_mirror(), pd); 1140 } 1141 } 1142JVM_END 1143 1144 1145JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException)) 1146 JVMWrapper("JVM_DoPrivileged"); 1147 1148 if (action == NULL) { 1149 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action"); 1150 } 1151 1152 // Stack allocated list of privileged stack elements 1153 PrivilegedElement pi; 1154 1155 // Check that action object understands "Object run()" 1156 Handle object (THREAD, JNIHandles::resolve(action)); 1157 1158 // get run() method 1159 Method* m_oop = object->klass()->uncached_lookup_method( 1160 vmSymbols::run_method_name(), 1161 vmSymbols::void_object_signature()); 1162 methodHandle m (THREAD, m_oop); 1163 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) { 1164 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method"); 1165 } 1166 1167 // Compute the frame initiating the do privileged operation and setup the privileged stack 1168 vframeStream vfst(thread); 1169 vfst.security_get_caller_frame(1); 1170 1171 if (!vfst.at_end()) { 1172 pi.initialize(&vfst, JNIHandles::resolve(context), thread->privileged_stack_top(), CHECK_NULL); 1173 thread->set_privileged_stack_top(&pi); 1174 } 1175 1176 1177 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type 1178 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction 1179 Handle pending_exception; 1180 JavaValue result(T_OBJECT); 1181 JavaCallArguments args(object); 1182 JavaCalls::call(&result, m, &args, THREAD); 1183 1184 // done with action, remove ourselves from the list 1185 if (!vfst.at_end()) { 1186 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element"); 1187 thread->set_privileged_stack_top(thread->privileged_stack_top()->next()); 1188 } 1189 1190 if (HAS_PENDING_EXCEPTION) { 1191 pending_exception = Handle(THREAD, PENDING_EXCEPTION); 1192 CLEAR_PENDING_EXCEPTION; 1193 1194 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) && 1195 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) { 1196 // Throw a java.security.PrivilegedActionException(Exception e) exception 1197 JavaCallArguments args(pending_exception); 1198 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(), 1199 vmSymbols::exception_void_signature(), 1200 &args); 1201 } 1202 } 1203 1204 if (pending_exception.not_null()) THROW_OOP_0(pending_exception()); 1205 return JNIHandles::make_local(env, (oop) result.get_jobject()); 1206JVM_END 1207 1208 1209// Returns the inherited_access_control_context field of the running thread. 1210JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls)) 1211 JVMWrapper("JVM_GetInheritedAccessControlContext"); 1212 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj()); 1213 return JNIHandles::make_local(env, result); 1214JVM_END 1215 1216class RegisterArrayForGC { 1217 private: 1218 JavaThread *_thread; 1219 public: 1220 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) { 1221 _thread = thread; 1222 _thread->register_array_for_gc(array); 1223 } 1224 1225 ~RegisterArrayForGC() { 1226 _thread->register_array_for_gc(NULL); 1227 } 1228}; 1229 1230 1231JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls)) 1232 JVMWrapper("JVM_GetStackAccessControlContext"); 1233 if (!UsePrivilegedStack) return NULL; 1234 1235 ResourceMark rm(THREAD); 1236 GrowableArray<oop>* local_array = new GrowableArray<oop>(12); 1237 JvmtiVMObjectAllocEventCollector oam; 1238 1239 // count the protection domains on the execution stack. We collapse 1240 // duplicate consecutive protection domains into a single one, as 1241 // well as stopping when we hit a privileged frame. 1242 1243 // Use vframeStream to iterate through Java frames 1244 vframeStream vfst(thread); 1245 1246 oop previous_protection_domain = NULL; 1247 Handle privileged_context(thread, NULL); 1248 bool is_privileged = false; 1249 oop protection_domain = NULL; 1250 1251 for(; !vfst.at_end(); vfst.next()) { 1252 // get method of frame 1253 Method* method = vfst.method(); 1254 intptr_t* frame_id = vfst.frame_id(); 1255 1256 // check the privileged frames to see if we have a match 1257 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) { 1258 // this frame is privileged 1259 is_privileged = true; 1260 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context()); 1261 protection_domain = thread->privileged_stack_top()->protection_domain(); 1262 } else { 1263 protection_domain = method->method_holder()->protection_domain(); 1264 } 1265 1266 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) { 1267 local_array->push(protection_domain); 1268 previous_protection_domain = protection_domain; 1269 } 1270 1271 if (is_privileged) break; 1272 } 1273 1274 1275 // either all the domains on the stack were system domains, or 1276 // we had a privileged system domain 1277 if (local_array->is_empty()) { 1278 if (is_privileged && privileged_context.is_null()) return NULL; 1279 1280 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL); 1281 return JNIHandles::make_local(env, result); 1282 } 1283 1284 // the resource area must be registered in case of a gc 1285 RegisterArrayForGC ragc(thread, local_array); 1286 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(), 1287 local_array->length(), CHECK_NULL); 1288 objArrayHandle h_context(thread, context); 1289 for (int index = 0; index < local_array->length(); index++) { 1290 h_context->obj_at_put(index, local_array->at(index)); 1291 } 1292 1293 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL); 1294 1295 return JNIHandles::make_local(env, result); 1296JVM_END 1297 1298 1299JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls)) 1300 JVMWrapper("JVM_IsArrayClass"); 1301 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1302 return (k != NULL) && k->oop_is_array() ? true : false; 1303JVM_END 1304 1305 1306JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls)) 1307 JVMWrapper("JVM_IsPrimitiveClass"); 1308 oop mirror = JNIHandles::resolve_non_null(cls); 1309 return (jboolean) java_lang_Class::is_primitive(mirror); 1310JVM_END 1311 1312 1313JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls)) 1314 JVMWrapper("JVM_GetComponentType"); 1315 oop mirror = JNIHandles::resolve_non_null(cls); 1316 oop result = Reflection::array_component_type(mirror, CHECK_NULL); 1317 return (jclass) JNIHandles::make_local(env, result); 1318JVM_END 1319 1320 1321JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls)) 1322 JVMWrapper("JVM_GetClassModifiers"); 1323 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1324 // Primitive type 1325 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 1326 } 1327 1328 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1329 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0)); 1330 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK"); 1331 return k->modifier_flags(); 1332JVM_END 1333 1334 1335// Inner class reflection /////////////////////////////////////////////////////////////////////////////// 1336 1337JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass)) 1338 JvmtiVMObjectAllocEventCollector oam; 1339 // ofClass is a reference to a java_lang_Class object. The mirror object 1340 // of an InstanceKlass 1341 1342 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1343 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) { 1344 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1345 return (jobjectArray)JNIHandles::make_local(env, result); 1346 } 1347 1348 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1349 InnerClassesIterator iter(k); 1350 1351 if (iter.length() == 0) { 1352 // Neither an inner nor outer class 1353 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL); 1354 return (jobjectArray)JNIHandles::make_local(env, result); 1355 } 1356 1357 // find inner class info 1358 constantPoolHandle cp(thread, k->constants()); 1359 int length = iter.length(); 1360 1361 // Allocate temp. result array 1362 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL); 1363 objArrayHandle result (THREAD, r); 1364 int members = 0; 1365 1366 for (; !iter.done(); iter.next()) { 1367 int ioff = iter.inner_class_info_index(); 1368 int ooff = iter.outer_class_info_index(); 1369 1370 if (ioff != 0 && ooff != 0) { 1371 // Check to see if the name matches the class we're looking for 1372 // before attempting to find the class. 1373 if (cp->klass_name_at_matches(k, ooff)) { 1374 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL); 1375 if (outer_klass == k()) { 1376 Klass* ik = cp->klass_at(ioff, CHECK_NULL); 1377 instanceKlassHandle inner_klass (THREAD, ik); 1378 1379 // Throws an exception if outer klass has not declared k as 1380 // an inner klass 1381 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL); 1382 1383 result->obj_at_put(members, inner_klass->java_mirror()); 1384 members++; 1385 } 1386 } 1387 } 1388 } 1389 1390 if (members != length) { 1391 // Return array of right length 1392 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL); 1393 for(int i = 0; i < members; i++) { 1394 res->obj_at_put(i, result->obj_at(i)); 1395 } 1396 return (jobjectArray)JNIHandles::make_local(env, res); 1397 } 1398 1399 return (jobjectArray)JNIHandles::make_local(env, result()); 1400JVM_END 1401 1402 1403JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass)) 1404{ 1405 // ofClass is a reference to a java_lang_Class object. 1406 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1407 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) { 1408 return NULL; 1409 } 1410 1411 bool inner_is_member = false; 1412 Klass* outer_klass 1413 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)) 1414 )->compute_enclosing_class(&inner_is_member, CHECK_NULL); 1415 if (outer_klass == NULL) return NULL; // already a top-level class 1416 if (!inner_is_member) return NULL; // an anonymous class (inside a method) 1417 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror()); 1418} 1419JVM_END 1420 1421// should be in InstanceKlass.cpp, but is here for historical reasons 1422Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k, 1423 bool* inner_is_member, 1424 TRAPS) { 1425 Thread* thread = THREAD; 1426 InnerClassesIterator iter(k); 1427 if (iter.length() == 0) { 1428 // No inner class info => no declaring class 1429 return NULL; 1430 } 1431 1432 constantPoolHandle i_cp(thread, k->constants()); 1433 1434 bool found = false; 1435 Klass* ok; 1436 instanceKlassHandle outer_klass; 1437 *inner_is_member = false; 1438 1439 // Find inner_klass attribute 1440 for (; !iter.done() && !found; iter.next()) { 1441 int ioff = iter.inner_class_info_index(); 1442 int ooff = iter.outer_class_info_index(); 1443 int noff = iter.inner_name_index(); 1444 if (ioff != 0) { 1445 // Check to see if the name matches the class we're looking for 1446 // before attempting to find the class. 1447 if (i_cp->klass_name_at_matches(k, ioff)) { 1448 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL); 1449 found = (k() == inner_klass); 1450 if (found && ooff != 0) { 1451 ok = i_cp->klass_at(ooff, CHECK_NULL); 1452 outer_klass = instanceKlassHandle(thread, ok); 1453 *inner_is_member = true; 1454 } 1455 } 1456 } 1457 } 1458 1459 if (found && outer_klass.is_null()) { 1460 // It may be anonymous; try for that. 1461 int encl_method_class_idx = k->enclosing_method_class_index(); 1462 if (encl_method_class_idx != 0) { 1463 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL); 1464 outer_klass = instanceKlassHandle(thread, ok); 1465 *inner_is_member = false; 1466 } 1467 } 1468 1469 // If no inner class attribute found for this class. 1470 if (outer_klass.is_null()) return NULL; 1471 1472 // Throws an exception if outer klass has not declared k as an inner klass 1473 // We need evidence that each klass knows about the other, or else 1474 // the system could allow a spoof of an inner class to gain access rights. 1475 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL); 1476 return outer_klass(); 1477} 1478 1479JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls)) 1480 assert (cls != NULL, "illegal class"); 1481 JVMWrapper("JVM_GetClassSignature"); 1482 JvmtiVMObjectAllocEventCollector oam; 1483 ResourceMark rm(THREAD); 1484 // Return null for arrays and primatives 1485 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1486 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1487 if (k->oop_is_instance()) { 1488 Symbol* sym = InstanceKlass::cast(k)->generic_signature(); 1489 if (sym == NULL) return NULL; 1490 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 1491 return (jstring) JNIHandles::make_local(env, str()); 1492 } 1493 } 1494 return NULL; 1495JVM_END 1496 1497 1498JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls)) 1499 assert (cls != NULL, "illegal class"); 1500 JVMWrapper("JVM_GetClassAnnotations"); 1501 1502 // Return null for arrays and primitives 1503 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1504 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1505 if (k->oop_is_instance()) { 1506 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL); 1507 return (jbyteArray) JNIHandles::make_local(env, a); 1508 } 1509 } 1510 return NULL; 1511JVM_END 1512 1513 1514static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) { 1515 // some of this code was adapted from from jni_FromReflectedField 1516 1517 oop reflected = JNIHandles::resolve_non_null(field); 1518 oop mirror = java_lang_reflect_Field::clazz(reflected); 1519 Klass* k = java_lang_Class::as_Klass(mirror); 1520 int slot = java_lang_reflect_Field::slot(reflected); 1521 int modifiers = java_lang_reflect_Field::modifiers(reflected); 1522 1523 KlassHandle kh(THREAD, k); 1524 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot); 1525 1526 if (modifiers & JVM_ACC_STATIC) { 1527 // for static fields we only look in the current class 1528 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) { 1529 assert(false, "cannot find static field"); 1530 return false; 1531 } 1532 } else { 1533 // for instance fields we start with the current class and work 1534 // our way up through the superclass chain 1535 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) { 1536 assert(false, "cannot find instance field"); 1537 return false; 1538 } 1539 } 1540 return true; 1541} 1542 1543JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field)) 1544 // field is a handle to a java.lang.reflect.Field object 1545 assert(field != NULL, "illegal field"); 1546 JVMWrapper("JVM_GetFieldAnnotations"); 1547 1548 fieldDescriptor fd; 1549 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL); 1550 if (!gotFd) { 1551 return NULL; 1552 } 1553 1554 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD)); 1555JVM_END 1556 1557 1558static Method* jvm_get_method_common(jobject method) { 1559 // some of this code was adapted from from jni_FromReflectedMethod 1560 1561 oop reflected = JNIHandles::resolve_non_null(method); 1562 oop mirror = NULL; 1563 int slot = 0; 1564 1565 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) { 1566 mirror = java_lang_reflect_Constructor::clazz(reflected); 1567 slot = java_lang_reflect_Constructor::slot(reflected); 1568 } else { 1569 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(), 1570 "wrong type"); 1571 mirror = java_lang_reflect_Method::clazz(reflected); 1572 slot = java_lang_reflect_Method::slot(reflected); 1573 } 1574 Klass* k = java_lang_Class::as_Klass(mirror); 1575 1576 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot); 1577 assert(m != NULL, "cannot find method"); 1578 return m; // caller has to deal with NULL in product mode 1579} 1580 1581 1582JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method)) 1583 JVMWrapper("JVM_GetMethodAnnotations"); 1584 1585 // method is a handle to a java.lang.reflect.Method object 1586 Method* m = jvm_get_method_common(method); 1587 if (m == NULL) { 1588 return NULL; 1589 } 1590 1591 return (jbyteArray) JNIHandles::make_local(env, 1592 Annotations::make_java_array(m->annotations(), THREAD)); 1593JVM_END 1594 1595 1596JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method)) 1597 JVMWrapper("JVM_GetMethodDefaultAnnotationValue"); 1598 1599 // method is a handle to a java.lang.reflect.Method object 1600 Method* m = jvm_get_method_common(method); 1601 if (m == NULL) { 1602 return NULL; 1603 } 1604 1605 return (jbyteArray) JNIHandles::make_local(env, 1606 Annotations::make_java_array(m->annotation_default(), THREAD)); 1607JVM_END 1608 1609 1610JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method)) 1611 JVMWrapper("JVM_GetMethodParameterAnnotations"); 1612 1613 // method is a handle to a java.lang.reflect.Method object 1614 Method* m = jvm_get_method_common(method); 1615 if (m == NULL) { 1616 return NULL; 1617 } 1618 1619 return (jbyteArray) JNIHandles::make_local(env, 1620 Annotations::make_java_array(m->parameter_annotations(), THREAD)); 1621JVM_END 1622 1623/* Type use annotations support (JDK 1.8) */ 1624 1625JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls)) 1626 assert (cls != NULL, "illegal class"); 1627 JVMWrapper("JVM_GetClassTypeAnnotations"); 1628 ResourceMark rm(THREAD); 1629 // Return null for arrays and primitives 1630 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) { 1631 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 1632 if (k->oop_is_instance()) { 1633 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations(); 1634 if (type_annotations != NULL) { 1635 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL); 1636 return (jbyteArray) JNIHandles::make_local(env, a); 1637 } 1638 } 1639 } 1640 return NULL; 1641JVM_END 1642 1643JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method)) 1644 assert (method != NULL, "illegal method"); 1645 JVMWrapper("JVM_GetMethodTypeAnnotations"); 1646 1647 // method is a handle to a java.lang.reflect.Method object 1648 Method* m = jvm_get_method_common(method); 1649 if (m == NULL) { 1650 return NULL; 1651 } 1652 1653 AnnotationArray* type_annotations = m->type_annotations(); 1654 if (type_annotations != NULL) { 1655 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL); 1656 return (jbyteArray) JNIHandles::make_local(env, a); 1657 } 1658 1659 return NULL; 1660JVM_END 1661 1662JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field)) 1663 assert (field != NULL, "illegal field"); 1664 JVMWrapper("JVM_GetFieldTypeAnnotations"); 1665 1666 fieldDescriptor fd; 1667 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL); 1668 if (!gotFd) { 1669 return NULL; 1670 } 1671 1672 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD)); 1673JVM_END 1674 1675static void bounds_check(constantPoolHandle cp, jint index, TRAPS) { 1676 if (!cp->is_within_bounds(index)) { 1677 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds"); 1678 } 1679} 1680 1681JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method)) 1682{ 1683 JVMWrapper("JVM_GetMethodParameters"); 1684 // method is a handle to a java.lang.reflect.Method object 1685 Method* method_ptr = jvm_get_method_common(method); 1686 methodHandle mh (THREAD, method_ptr); 1687 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method)); 1688 const int num_params = mh->method_parameters_length(); 1689 1690 if (0 != num_params) { 1691 // make sure all the symbols are properly formatted 1692 for (int i = 0; i < num_params; i++) { 1693 MethodParametersElement* params = mh->method_parameters_start(); 1694 int index = params[i].name_cp_index; 1695 bounds_check(mh->constants(), index, CHECK_NULL); 1696 1697 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) { 1698 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), 1699 "Wrong type at constant pool index"); 1700 } 1701 1702 } 1703 1704 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL); 1705 objArrayHandle result (THREAD, result_oop); 1706 1707 for (int i = 0; i < num_params; i++) { 1708 MethodParametersElement* params = mh->method_parameters_start(); 1709 // For a 0 index, give a NULL symbol 1710 Symbol* sym = 0 != params[i].name_cp_index ? 1711 mh->constants()->symbol_at(params[i].name_cp_index) : NULL; 1712 int flags = params[i].flags; 1713 oop param = Reflection::new_parameter(reflected_method, i, sym, 1714 flags, CHECK_NULL); 1715 result->obj_at_put(i, param); 1716 } 1717 return (jobjectArray)JNIHandles::make_local(env, result()); 1718 } else { 1719 return (jobjectArray)NULL; 1720 } 1721} 1722JVM_END 1723 1724// New (JDK 1.4) reflection implementation ///////////////////////////////////// 1725 1726JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1727{ 1728 JVMWrapper("JVM_GetClassDeclaredFields"); 1729 JvmtiVMObjectAllocEventCollector oam; 1730 1731 // Exclude primitive types and array types 1732 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) || 1733 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) { 1734 // Return empty array 1735 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL); 1736 return (jobjectArray) JNIHandles::make_local(env, res); 1737 } 1738 1739 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1740 constantPoolHandle cp(THREAD, k->constants()); 1741 1742 // Ensure class is linked 1743 k->link_class(CHECK_NULL); 1744 1745 // 4496456 We need to filter out java.lang.Throwable.backtrace 1746 bool skip_backtrace = false; 1747 1748 // Allocate result 1749 int num_fields; 1750 1751 if (publicOnly) { 1752 num_fields = 0; 1753 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) { 1754 if (fs.access_flags().is_public()) ++num_fields; 1755 } 1756 } else { 1757 num_fields = k->java_fields_count(); 1758 1759 if (k() == SystemDictionary::Throwable_klass()) { 1760 num_fields--; 1761 skip_backtrace = true; 1762 } 1763 } 1764 1765 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL); 1766 objArrayHandle result (THREAD, r); 1767 1768 int out_idx = 0; 1769 fieldDescriptor fd; 1770 for (JavaFieldStream fs(k); !fs.done(); fs.next()) { 1771 if (skip_backtrace) { 1772 // 4496456 skip java.lang.Throwable.backtrace 1773 int offset = fs.offset(); 1774 if (offset == java_lang_Throwable::get_backtrace_offset()) continue; 1775 } 1776 1777 if (!publicOnly || fs.access_flags().is_public()) { 1778 fd.initialize(k(), fs.index()); 1779 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL); 1780 result->obj_at_put(out_idx, field); 1781 ++out_idx; 1782 } 1783 } 1784 assert(out_idx == num_fields, "just checking"); 1785 return (jobjectArray) JNIHandles::make_local(env, result()); 1786} 1787JVM_END 1788 1789JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1790{ 1791 JVMWrapper("JVM_GetClassDeclaredMethods"); 1792 JvmtiVMObjectAllocEventCollector oam; 1793 1794 // Exclude primitive types and array types 1795 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) 1796 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) { 1797 // Return empty array 1798 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), 0, CHECK_NULL); 1799 return (jobjectArray) JNIHandles::make_local(env, res); 1800 } 1801 1802 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1803 1804 // Ensure class is linked 1805 k->link_class(CHECK_NULL); 1806 1807 Array<Method*>* methods = k->methods(); 1808 int methods_length = methods->length(); 1809 int num_methods = 0; 1810 1811 int i; 1812 for (i = 0; i < methods_length; i++) { 1813 methodHandle method(THREAD, methods->at(i)); 1814 if (!method->is_initializer() && !method->is_overpass()) { 1815 if (!publicOnly || method->is_public()) { 1816 ++num_methods; 1817 } 1818 } 1819 } 1820 1821 // Allocate result 1822 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), num_methods, CHECK_NULL); 1823 objArrayHandle result (THREAD, r); 1824 1825 int out_idx = 0; 1826 for (i = 0; i < methods_length; i++) { 1827 methodHandle method(THREAD, methods->at(i)); 1828 if (!method->is_initializer() && !method->is_overpass()) { 1829 if (!publicOnly || method->is_public()) { 1830 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL); 1831 result->obj_at_put(out_idx, m); 1832 ++out_idx; 1833 } 1834 } 1835 } 1836 assert(out_idx == num_methods, "just checking"); 1837 return (jobjectArray) JNIHandles::make_local(env, result()); 1838} 1839JVM_END 1840 1841JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1842{ 1843 JVMWrapper("JVM_GetClassDeclaredConstructors"); 1844 JvmtiVMObjectAllocEventCollector oam; 1845 1846 // Exclude primitive types and array types 1847 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) 1848 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) { 1849 // Return empty array 1850 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0 , CHECK_NULL); 1851 return (jobjectArray) JNIHandles::make_local(env, res); 1852 } 1853 1854 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))); 1855 1856 // Ensure class is linked 1857 k->link_class(CHECK_NULL); 1858 1859 Array<Method*>* methods = k->methods(); 1860 int methods_length = methods->length(); 1861 int num_constructors = 0; 1862 1863 int i; 1864 for (i = 0; i < methods_length; i++) { 1865 methodHandle method(THREAD, methods->at(i)); 1866 if (method->is_initializer() && !method->is_static()) { 1867 if (!publicOnly || method->is_public()) { 1868 ++num_constructors; 1869 } 1870 } 1871 } 1872 1873 // Allocate result 1874 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), num_constructors, CHECK_NULL); 1875 objArrayHandle result(THREAD, r); 1876 1877 int out_idx = 0; 1878 for (i = 0; i < methods_length; i++) { 1879 methodHandle method(THREAD, methods->at(i)); 1880 if (method->is_initializer() && !method->is_static()) { 1881 if (!publicOnly || method->is_public()) { 1882 oop m = Reflection::new_constructor(method, CHECK_NULL); 1883 result->obj_at_put(out_idx, m); 1884 ++out_idx; 1885 } 1886 } 1887 } 1888 assert(out_idx == num_constructors, "just checking"); 1889 return (jobjectArray) JNIHandles::make_local(env, result()); 1890} 1891JVM_END 1892 1893JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls)) 1894{ 1895 JVMWrapper("JVM_GetClassAccessFlags"); 1896 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1897 // Primitive type 1898 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 1899 } 1900 1901 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1902 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS; 1903} 1904JVM_END 1905 1906 1907// Constant pool access ////////////////////////////////////////////////////////// 1908 1909JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls)) 1910{ 1911 JVMWrapper("JVM_GetClassConstantPool"); 1912 JvmtiVMObjectAllocEventCollector oam; 1913 1914 // Return null for primitives and arrays 1915 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { 1916 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1917 if (k->oop_is_instance()) { 1918 instanceKlassHandle k_h(THREAD, k); 1919 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL); 1920 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants()); 1921 return JNIHandles::make_local(jcp()); 1922 } 1923 } 1924 return NULL; 1925} 1926JVM_END 1927 1928 1929JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused)) 1930{ 1931 JVMWrapper("JVM_ConstantPoolGetSize"); 1932 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 1933 return cp->length(); 1934} 1935JVM_END 1936 1937 1938JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 1939{ 1940 JVMWrapper("JVM_ConstantPoolGetClassAt"); 1941 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 1942 bounds_check(cp, index, CHECK_NULL); 1943 constantTag tag = cp->tag_at(index); 1944 if (!tag.is_klass() && !tag.is_unresolved_klass()) { 1945 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1946 } 1947 Klass* k = cp->klass_at(index, CHECK_NULL); 1948 return (jclass) JNIHandles::make_local(k->java_mirror()); 1949} 1950JVM_END 1951 1952JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) 1953{ 1954 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded"); 1955 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 1956 bounds_check(cp, index, CHECK_NULL); 1957 constantTag tag = cp->tag_at(index); 1958 if (!tag.is_klass() && !tag.is_unresolved_klass()) { 1959 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1960 } 1961 Klass* k = ConstantPool::klass_at_if_loaded(cp, index); 1962 if (k == NULL) return NULL; 1963 return (jclass) JNIHandles::make_local(k->java_mirror()); 1964} 1965JVM_END 1966 1967static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { 1968 constantTag tag = cp->tag_at(index); 1969 if (!tag.is_method() && !tag.is_interface_method()) { 1970 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 1971 } 1972 int klass_ref = cp->uncached_klass_ref_index_at(index); 1973 Klass* k_o; 1974 if (force_resolution) { 1975 k_o = cp->klass_at(klass_ref, CHECK_NULL); 1976 } else { 1977 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref); 1978 if (k_o == NULL) return NULL; 1979 } 1980 instanceKlassHandle k(THREAD, k_o); 1981 Symbol* name = cp->uncached_name_ref_at(index); 1982 Symbol* sig = cp->uncached_signature_ref_at(index); 1983 methodHandle m (THREAD, k->find_method(name, sig)); 1984 if (m.is_null()) { 1985 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class"); 1986 } 1987 oop method; 1988 if (!m->is_initializer() || m->is_static()) { 1989 method = Reflection::new_method(m, true, true, CHECK_NULL); 1990 } else { 1991 method = Reflection::new_constructor(m, CHECK_NULL); 1992 } 1993 return JNIHandles::make_local(method); 1994} 1995 1996JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 1997{ 1998 JVMWrapper("JVM_ConstantPoolGetMethodAt"); 1999 JvmtiVMObjectAllocEventCollector oam; 2000 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2001 bounds_check(cp, index, CHECK_NULL); 2002 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL); 2003 return res; 2004} 2005JVM_END 2006 2007JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) 2008{ 2009 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded"); 2010 JvmtiVMObjectAllocEventCollector oam; 2011 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2012 bounds_check(cp, index, CHECK_NULL); 2013 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL); 2014 return res; 2015} 2016JVM_END 2017 2018static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { 2019 constantTag tag = cp->tag_at(index); 2020 if (!tag.is_field()) { 2021 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2022 } 2023 int klass_ref = cp->uncached_klass_ref_index_at(index); 2024 Klass* k_o; 2025 if (force_resolution) { 2026 k_o = cp->klass_at(klass_ref, CHECK_NULL); 2027 } else { 2028 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref); 2029 if (k_o == NULL) return NULL; 2030 } 2031 instanceKlassHandle k(THREAD, k_o); 2032 Symbol* name = cp->uncached_name_ref_at(index); 2033 Symbol* sig = cp->uncached_signature_ref_at(index); 2034 fieldDescriptor fd; 2035 Klass* target_klass = k->find_field(name, sig, &fd); 2036 if (target_klass == NULL) { 2037 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class"); 2038 } 2039 oop field = Reflection::new_field(&fd, true, CHECK_NULL); 2040 return JNIHandles::make_local(field); 2041} 2042 2043JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index)) 2044{ 2045 JVMWrapper("JVM_ConstantPoolGetFieldAt"); 2046 JvmtiVMObjectAllocEventCollector oam; 2047 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2048 bounds_check(cp, index, CHECK_NULL); 2049 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL); 2050 return res; 2051} 2052JVM_END 2053 2054JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) 2055{ 2056 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded"); 2057 JvmtiVMObjectAllocEventCollector oam; 2058 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2059 bounds_check(cp, index, CHECK_NULL); 2060 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL); 2061 return res; 2062} 2063JVM_END 2064 2065JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2066{ 2067 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt"); 2068 JvmtiVMObjectAllocEventCollector oam; 2069 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2070 bounds_check(cp, index, CHECK_NULL); 2071 constantTag tag = cp->tag_at(index); 2072 if (!tag.is_field_or_method()) { 2073 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2074 } 2075 int klass_ref = cp->uncached_klass_ref_index_at(index); 2076 Symbol* klass_name = cp->klass_name_at(klass_ref); 2077 Symbol* member_name = cp->uncached_name_ref_at(index); 2078 Symbol* member_sig = cp->uncached_signature_ref_at(index); 2079 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL); 2080 objArrayHandle dest(THREAD, dest_o); 2081 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL); 2082 dest->obj_at_put(0, str()); 2083 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL); 2084 dest->obj_at_put(1, str()); 2085 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL); 2086 dest->obj_at_put(2, str()); 2087 return (jobjectArray) JNIHandles::make_local(dest()); 2088} 2089JVM_END 2090 2091JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2092{ 2093 JVMWrapper("JVM_ConstantPoolGetIntAt"); 2094 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2095 bounds_check(cp, index, CHECK_0); 2096 constantTag tag = cp->tag_at(index); 2097 if (!tag.is_int()) { 2098 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2099 } 2100 return cp->int_at(index); 2101} 2102JVM_END 2103 2104JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2105{ 2106 JVMWrapper("JVM_ConstantPoolGetLongAt"); 2107 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2108 bounds_check(cp, index, CHECK_(0L)); 2109 constantTag tag = cp->tag_at(index); 2110 if (!tag.is_long()) { 2111 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2112 } 2113 return cp->long_at(index); 2114} 2115JVM_END 2116 2117JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2118{ 2119 JVMWrapper("JVM_ConstantPoolGetFloatAt"); 2120 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2121 bounds_check(cp, index, CHECK_(0.0f)); 2122 constantTag tag = cp->tag_at(index); 2123 if (!tag.is_float()) { 2124 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2125 } 2126 return cp->float_at(index); 2127} 2128JVM_END 2129 2130JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2131{ 2132 JVMWrapper("JVM_ConstantPoolGetDoubleAt"); 2133 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2134 bounds_check(cp, index, CHECK_(0.0)); 2135 constantTag tag = cp->tag_at(index); 2136 if (!tag.is_double()) { 2137 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2138 } 2139 return cp->double_at(index); 2140} 2141JVM_END 2142 2143JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2144{ 2145 JVMWrapper("JVM_ConstantPoolGetStringAt"); 2146 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2147 bounds_check(cp, index, CHECK_NULL); 2148 constantTag tag = cp->tag_at(index); 2149 if (!tag.is_string()) { 2150 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2151 } 2152 oop str = cp->string_at(index, CHECK_NULL); 2153 return (jstring) JNIHandles::make_local(str); 2154} 2155JVM_END 2156 2157JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index)) 2158{ 2159 JVMWrapper("JVM_ConstantPoolGetUTF8At"); 2160 JvmtiVMObjectAllocEventCollector oam; 2161 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2162 bounds_check(cp, index, CHECK_NULL); 2163 constantTag tag = cp->tag_at(index); 2164 if (!tag.is_symbol()) { 2165 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2166 } 2167 Symbol* sym = cp->symbol_at(index); 2168 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 2169 return (jstring) JNIHandles::make_local(str()); 2170} 2171JVM_END 2172 2173 2174// Assertion support. ////////////////////////////////////////////////////////// 2175 2176JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls)) 2177 JVMWrapper("JVM_DesiredAssertionStatus"); 2178 assert(cls != NULL, "bad class"); 2179 2180 oop r = JNIHandles::resolve(cls); 2181 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed"); 2182 if (java_lang_Class::is_primitive(r)) return false; 2183 2184 Klass* k = java_lang_Class::as_Klass(r); 2185 assert(k->oop_is_instance(), "must be an instance klass"); 2186 if (! k->oop_is_instance()) return false; 2187 2188 ResourceMark rm(THREAD); 2189 const char* name = k->name()->as_C_string(); 2190 bool system_class = k->class_loader() == NULL; 2191 return JavaAssertions::enabled(name, system_class); 2192 2193JVM_END 2194 2195 2196// Return a new AssertionStatusDirectives object with the fields filled in with 2197// command-line assertion arguments (i.e., -ea, -da). 2198JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused)) 2199 JVMWrapper("JVM_AssertionStatusDirectives"); 2200 JvmtiVMObjectAllocEventCollector oam; 2201 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL); 2202 return JNIHandles::make_local(env, asd); 2203JVM_END 2204 2205// Verification //////////////////////////////////////////////////////////////////////////////// 2206 2207// Reflection for the verifier ///////////////////////////////////////////////////////////////// 2208 2209// RedefineClasses support: bug 6214132 caused verification to fail. 2210// All functions from this section should call the jvmtiThreadSate function: 2211// Klass* class_to_verify_considering_redefinition(Klass* klass). 2212// The function returns a Klass* of the _scratch_class if the verifier 2213// was invoked in the middle of the class redefinition. 2214// Otherwise it returns its argument value which is the _the_class Klass*. 2215// Please, refer to the description in the jvmtiThreadSate.hpp. 2216 2217JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls)) 2218 JVMWrapper("JVM_GetClassNameUTF"); 2219 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2220 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2221 return k->name()->as_utf8(); 2222JVM_END 2223 2224 2225JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types)) 2226 JVMWrapper("JVM_GetClassCPTypes"); 2227 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2228 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2229 // types will have length zero if this is not an InstanceKlass 2230 // (length is determined by call to JVM_GetClassCPEntriesCount) 2231 if (k->oop_is_instance()) { 2232 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2233 for (int index = cp->length() - 1; index >= 0; index--) { 2234 constantTag tag = cp->tag_at(index); 2235 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value(); 2236 } 2237 } 2238JVM_END 2239 2240 2241JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls)) 2242 JVMWrapper("JVM_GetClassCPEntriesCount"); 2243 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2244 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2245 if (!k->oop_is_instance()) 2246 return 0; 2247 return InstanceKlass::cast(k)->constants()->length(); 2248JVM_END 2249 2250 2251JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls)) 2252 JVMWrapper("JVM_GetClassFieldsCount"); 2253 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2254 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2255 if (!k->oop_is_instance()) 2256 return 0; 2257 return InstanceKlass::cast(k)->java_fields_count(); 2258JVM_END 2259 2260 2261JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls)) 2262 JVMWrapper("JVM_GetClassMethodsCount"); 2263 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2264 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2265 if (!k->oop_is_instance()) 2266 return 0; 2267 return InstanceKlass::cast(k)->methods()->length(); 2268JVM_END 2269 2270 2271// The following methods, used for the verifier, are never called with 2272// array klasses, so a direct cast to InstanceKlass is safe. 2273// Typically, these methods are called in a loop with bounds determined 2274// by the results of JVM_GetClass{Fields,Methods}Count, which return 2275// zero for arrays. 2276JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions)) 2277 JVMWrapper("JVM_GetMethodIxExceptionIndexes"); 2278 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2279 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2280 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2281 int length = method->checked_exceptions_length(); 2282 if (length > 0) { 2283 CheckedExceptionElement* table= method->checked_exceptions_start(); 2284 for (int i = 0; i < length; i++) { 2285 exceptions[i] = table[i].class_cp_index; 2286 } 2287 } 2288JVM_END 2289 2290 2291JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index)) 2292 JVMWrapper("JVM_GetMethodIxExceptionsCount"); 2293 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2294 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2295 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2296 return method->checked_exceptions_length(); 2297JVM_END 2298 2299 2300JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code)) 2301 JVMWrapper("JVM_GetMethodIxByteCode"); 2302 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2303 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2304 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2305 memcpy(code, method->code_base(), method->code_size()); 2306JVM_END 2307 2308 2309JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index)) 2310 JVMWrapper("JVM_GetMethodIxByteCodeLength"); 2311 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2312 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2313 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2314 return method->code_size(); 2315JVM_END 2316 2317 2318JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry)) 2319 JVMWrapper("JVM_GetMethodIxExceptionTableEntry"); 2320 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2321 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2322 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2323 ExceptionTable extable(method); 2324 entry->start_pc = extable.start_pc(entry_index); 2325 entry->end_pc = extable.end_pc(entry_index); 2326 entry->handler_pc = extable.handler_pc(entry_index); 2327 entry->catchType = extable.catch_type_index(entry_index); 2328JVM_END 2329 2330 2331JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index)) 2332 JVMWrapper("JVM_GetMethodIxExceptionTableLength"); 2333 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2334 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2335 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2336 return method->exception_table_length(); 2337JVM_END 2338 2339 2340JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index)) 2341 JVMWrapper("JVM_GetMethodIxModifiers"); 2342 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2343 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2344 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2345 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2346JVM_END 2347 2348 2349JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index)) 2350 JVMWrapper("JVM_GetFieldIxModifiers"); 2351 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2352 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2353 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS; 2354JVM_END 2355 2356 2357JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index)) 2358 JVMWrapper("JVM_GetMethodIxLocalsCount"); 2359 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2360 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2361 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2362 return method->max_locals(); 2363JVM_END 2364 2365 2366JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index)) 2367 JVMWrapper("JVM_GetMethodIxArgsSize"); 2368 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2369 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2370 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2371 return method->size_of_parameters(); 2372JVM_END 2373 2374 2375JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index)) 2376 JVMWrapper("JVM_GetMethodIxMaxStack"); 2377 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2378 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2379 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2380 return method->verifier_max_stack(); 2381JVM_END 2382 2383 2384JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index)) 2385 JVMWrapper("JVM_IsConstructorIx"); 2386 ResourceMark rm(THREAD); 2387 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2388 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2389 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2390 return method->name() == vmSymbols::object_initializer_name(); 2391JVM_END 2392 2393 2394JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index)) 2395 JVMWrapper("JVM_IsVMGeneratedMethodIx"); 2396 ResourceMark rm(THREAD); 2397 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2398 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2399 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2400 return method->is_overpass(); 2401JVM_END 2402 2403JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index)) 2404 JVMWrapper("JVM_GetMethodIxIxUTF"); 2405 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2406 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2407 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2408 return method->name()->as_utf8(); 2409JVM_END 2410 2411 2412JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index)) 2413 JVMWrapper("JVM_GetMethodIxSignatureUTF"); 2414 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2415 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2416 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2417 return method->signature()->as_utf8(); 2418JVM_END 2419 2420/** 2421 * All of these JVM_GetCP-xxx methods are used by the old verifier to 2422 * read entries in the constant pool. Since the old verifier always 2423 * works on a copy of the code, it will not see any rewriting that 2424 * may possibly occur in the middle of verification. So it is important 2425 * that nothing it calls tries to use the cpCache instead of the raw 2426 * constant pool, so we must use cp->uncached_x methods when appropriate. 2427 */ 2428JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2429 JVMWrapper("JVM_GetCPFieldNameUTF"); 2430 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2431 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2432 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2433 switch (cp->tag_at(cp_index).value()) { 2434 case JVM_CONSTANT_Fieldref: 2435 return cp->uncached_name_ref_at(cp_index)->as_utf8(); 2436 default: 2437 fatal("JVM_GetCPFieldNameUTF: illegal constant"); 2438 } 2439 ShouldNotReachHere(); 2440 return NULL; 2441JVM_END 2442 2443 2444JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2445 JVMWrapper("JVM_GetCPMethodNameUTF"); 2446 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2447 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2448 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2449 switch (cp->tag_at(cp_index).value()) { 2450 case JVM_CONSTANT_InterfaceMethodref: 2451 case JVM_CONSTANT_Methodref: 2452 case JVM_CONSTANT_NameAndType: // for invokedynamic 2453 return cp->uncached_name_ref_at(cp_index)->as_utf8(); 2454 default: 2455 fatal("JVM_GetCPMethodNameUTF: illegal constant"); 2456 } 2457 ShouldNotReachHere(); 2458 return NULL; 2459JVM_END 2460 2461 2462JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) 2463 JVMWrapper("JVM_GetCPMethodSignatureUTF"); 2464 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2465 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2466 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2467 switch (cp->tag_at(cp_index).value()) { 2468 case JVM_CONSTANT_InterfaceMethodref: 2469 case JVM_CONSTANT_Methodref: 2470 case JVM_CONSTANT_NameAndType: // for invokedynamic 2471 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); 2472 default: 2473 fatal("JVM_GetCPMethodSignatureUTF: illegal constant"); 2474 } 2475 ShouldNotReachHere(); 2476 return NULL; 2477JVM_END 2478 2479 2480JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) 2481 JVMWrapper("JVM_GetCPFieldSignatureUTF"); 2482 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2483 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2484 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2485 switch (cp->tag_at(cp_index).value()) { 2486 case JVM_CONSTANT_Fieldref: 2487 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); 2488 default: 2489 fatal("JVM_GetCPFieldSignatureUTF: illegal constant"); 2490 } 2491 ShouldNotReachHere(); 2492 return NULL; 2493JVM_END 2494 2495 2496JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2497 JVMWrapper("JVM_GetCPClassNameUTF"); 2498 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2499 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2500 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2501 Symbol* classname = cp->klass_name_at(cp_index); 2502 return classname->as_utf8(); 2503JVM_END 2504 2505 2506JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2507 JVMWrapper("JVM_GetCPFieldClassNameUTF"); 2508 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2509 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2510 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2511 switch (cp->tag_at(cp_index).value()) { 2512 case JVM_CONSTANT_Fieldref: { 2513 int class_index = cp->uncached_klass_ref_index_at(cp_index); 2514 Symbol* classname = cp->klass_name_at(class_index); 2515 return classname->as_utf8(); 2516 } 2517 default: 2518 fatal("JVM_GetCPFieldClassNameUTF: illegal constant"); 2519 } 2520 ShouldNotReachHere(); 2521 return NULL; 2522JVM_END 2523 2524 2525JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2526 JVMWrapper("JVM_GetCPMethodClassNameUTF"); 2527 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2528 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2529 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2530 switch (cp->tag_at(cp_index).value()) { 2531 case JVM_CONSTANT_Methodref: 2532 case JVM_CONSTANT_InterfaceMethodref: { 2533 int class_index = cp->uncached_klass_ref_index_at(cp_index); 2534 Symbol* classname = cp->klass_name_at(class_index); 2535 return classname->as_utf8(); 2536 } 2537 default: 2538 fatal("JVM_GetCPMethodClassNameUTF: illegal constant"); 2539 } 2540 ShouldNotReachHere(); 2541 return NULL; 2542JVM_END 2543 2544 2545JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) 2546 JVMWrapper("JVM_GetCPFieldModifiers"); 2547 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2548 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls)); 2549 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2550 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); 2551 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2552 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants(); 2553 switch (cp->tag_at(cp_index).value()) { 2554 case JVM_CONSTANT_Fieldref: { 2555 Symbol* name = cp->uncached_name_ref_at(cp_index); 2556 Symbol* signature = cp->uncached_signature_ref_at(cp_index); 2557 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) { 2558 if (fs.name() == name && fs.signature() == signature) { 2559 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS; 2560 } 2561 } 2562 return -1; 2563 } 2564 default: 2565 fatal("JVM_GetCPFieldModifiers: illegal constant"); 2566 } 2567 ShouldNotReachHere(); 2568 return 0; 2569JVM_END 2570 2571 2572JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) 2573 JVMWrapper("JVM_GetCPMethodModifiers"); 2574 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2575 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls)); 2576 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2577 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); 2578 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2579 switch (cp->tag_at(cp_index).value()) { 2580 case JVM_CONSTANT_Methodref: 2581 case JVM_CONSTANT_InterfaceMethodref: { 2582 Symbol* name = cp->uncached_name_ref_at(cp_index); 2583 Symbol* signature = cp->uncached_signature_ref_at(cp_index); 2584 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods(); 2585 int methods_count = methods->length(); 2586 for (int i = 0; i < methods_count; i++) { 2587 Method* method = methods->at(i); 2588 if (method->name() == name && method->signature() == signature) { 2589 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2590 } 2591 } 2592 return -1; 2593 } 2594 default: 2595 fatal("JVM_GetCPMethodModifiers: illegal constant"); 2596 } 2597 ShouldNotReachHere(); 2598 return 0; 2599JVM_END 2600 2601 2602// Misc ////////////////////////////////////////////////////////////////////////////////////////////// 2603 2604JVM_LEAF(void, JVM_ReleaseUTF(const char *utf)) 2605 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything 2606JVM_END 2607 2608 2609JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2)) 2610 JVMWrapper("JVM_IsSameClassPackage"); 2611 oop class1_mirror = JNIHandles::resolve_non_null(class1); 2612 oop class2_mirror = JNIHandles::resolve_non_null(class2); 2613 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror); 2614 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror); 2615 return (jboolean) Reflection::is_same_class_package(klass1, klass2); 2616JVM_END 2617 2618 2619// IO functions //////////////////////////////////////////////////////////////////////////////////////// 2620 2621JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode)) 2622 JVMWrapper2("JVM_Open (%s)", fname); 2623 2624 //%note jvm_r6 2625 int result = os::open(fname, flags, mode); 2626 if (result >= 0) { 2627 return result; 2628 } else { 2629 switch(errno) { 2630 case EEXIST: 2631 return JVM_EEXIST; 2632 default: 2633 return -1; 2634 } 2635 } 2636JVM_END 2637 2638 2639JVM_LEAF(jint, JVM_Close(jint fd)) 2640 JVMWrapper2("JVM_Close (0x%x)", fd); 2641 //%note jvm_r6 2642 return os::close(fd); 2643JVM_END 2644 2645 2646JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes)) 2647 JVMWrapper2("JVM_Read (0x%x)", fd); 2648 2649 //%note jvm_r6 2650 return (jint)os::restartable_read(fd, buf, nbytes); 2651JVM_END 2652 2653 2654JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes)) 2655 JVMWrapper2("JVM_Write (0x%x)", fd); 2656 2657 //%note jvm_r6 2658 return (jint)os::write(fd, buf, nbytes); 2659JVM_END 2660 2661 2662JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes)) 2663 JVMWrapper2("JVM_Available (0x%x)", fd); 2664 //%note jvm_r6 2665 return os::available(fd, pbytes); 2666JVM_END 2667 2668 2669JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence)) 2670 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence); 2671 //%note jvm_r6 2672 return os::lseek(fd, offset, whence); 2673JVM_END 2674 2675 2676JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length)) 2677 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length); 2678 return os::ftruncate(fd, length); 2679JVM_END 2680 2681 2682JVM_LEAF(jint, JVM_Sync(jint fd)) 2683 JVMWrapper2("JVM_Sync (0x%x)", fd); 2684 //%note jvm_r6 2685 return os::fsync(fd); 2686JVM_END 2687 2688 2689// Printing support ////////////////////////////////////////////////// 2690extern "C" { 2691 2692int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) { 2693 // see bug 4399518, 4417214 2694 if ((intptr_t)count <= 0) return -1; 2695 return vsnprintf(str, count, fmt, args); 2696} 2697 2698 2699int jio_snprintf(char *str, size_t count, const char *fmt, ...) { 2700 va_list args; 2701 int len; 2702 va_start(args, fmt); 2703 len = jio_vsnprintf(str, count, fmt, args); 2704 va_end(args); 2705 return len; 2706} 2707 2708 2709int jio_fprintf(FILE* f, const char *fmt, ...) { 2710 int len; 2711 va_list args; 2712 va_start(args, fmt); 2713 len = jio_vfprintf(f, fmt, args); 2714 va_end(args); 2715 return len; 2716} 2717 2718 2719int jio_vfprintf(FILE* f, const char *fmt, va_list args) { 2720 if (Arguments::vfprintf_hook() != NULL) { 2721 return Arguments::vfprintf_hook()(f, fmt, args); 2722 } else { 2723 return vfprintf(f, fmt, args); 2724 } 2725} 2726 2727 2728JNIEXPORT int jio_printf(const char *fmt, ...) { 2729 int len; 2730 va_list args; 2731 va_start(args, fmt); 2732 len = jio_vfprintf(defaultStream::output_stream(), fmt, args); 2733 va_end(args); 2734 return len; 2735} 2736 2737 2738// HotSpot specific jio method 2739void jio_print(const char* s) { 2740 // Try to make this function as atomic as possible. 2741 if (Arguments::vfprintf_hook() != NULL) { 2742 jio_fprintf(defaultStream::output_stream(), "%s", s); 2743 } else { 2744 // Make an unused local variable to avoid warning from gcc 4.x compiler. 2745 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s)); 2746 } 2747} 2748 2749} // Extern C 2750 2751// java.lang.Thread ////////////////////////////////////////////////////////////////////////////// 2752 2753// In most of the JVM Thread support functions we need to be sure to lock the Threads_lock 2754// to prevent the target thread from exiting after we have a pointer to the C++ Thread or 2755// OSThread objects. The exception to this rule is when the target object is the thread 2756// doing the operation, in which case we know that the thread won't exit until the 2757// operation is done (all exits being voluntary). There are a few cases where it is 2758// rather silly to do operations on yourself, like resuming yourself or asking whether 2759// you are alive. While these can still happen, they are not subject to deadlocks if 2760// the lock is held while the operation occurs (this is not the case for suspend, for 2761// instance), and are very unlikely. Because IsAlive needs to be fast and its 2762// implementation is local to this file, we always lock Threads_lock for that one. 2763 2764static void thread_entry(JavaThread* thread, TRAPS) { 2765 HandleMark hm(THREAD); 2766 Handle obj(THREAD, thread->threadObj()); 2767 JavaValue result(T_VOID); 2768 JavaCalls::call_virtual(&result, 2769 obj, 2770 KlassHandle(THREAD, SystemDictionary::Thread_klass()), 2771 vmSymbols::run_method_name(), 2772 vmSymbols::void_method_signature(), 2773 THREAD); 2774} 2775 2776 2777JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread)) 2778 JVMWrapper("JVM_StartThread"); 2779 JavaThread *native_thread = NULL; 2780 2781 // We cannot hold the Threads_lock when we throw an exception, 2782 // due to rank ordering issues. Example: we might need to grab the 2783 // Heap_lock while we construct the exception. 2784 bool throw_illegal_thread_state = false; 2785 2786 // We must release the Threads_lock before we can post a jvmti event 2787 // in Thread::start. 2788 { 2789 // Ensure that the C++ Thread and OSThread structures aren't freed before 2790 // we operate. 2791 MutexLocker mu(Threads_lock); 2792 2793 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent 2794 // re-starting an already started thread, so we should usually find 2795 // that the JavaThread is null. However for a JNI attached thread 2796 // there is a small window between the Thread object being created 2797 // (with its JavaThread set) and the update to its threadStatus, so we 2798 // have to check for this 2799 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) { 2800 throw_illegal_thread_state = true; 2801 } else { 2802 // We could also check the stillborn flag to see if this thread was already stopped, but 2803 // for historical reasons we let the thread detect that itself when it starts running 2804 2805 jlong size = 2806 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread)); 2807 // Allocate the C++ Thread structure and create the native thread. The 2808 // stack size retrieved from java is signed, but the constructor takes 2809 // size_t (an unsigned type), so avoid passing negative values which would 2810 // result in really large stacks. 2811 size_t sz = size > 0 ? (size_t) size : 0; 2812 native_thread = new JavaThread(&thread_entry, sz); 2813 2814 // At this point it may be possible that no osthread was created for the 2815 // JavaThread due to lack of memory. Check for this situation and throw 2816 // an exception if necessary. Eventually we may want to change this so 2817 // that we only grab the lock if the thread was created successfully - 2818 // then we can also do this check and throw the exception in the 2819 // JavaThread constructor. 2820 if (native_thread->osthread() != NULL) { 2821 // Note: the current thread is not being used within "prepare". 2822 native_thread->prepare(jthread); 2823 } 2824 } 2825 } 2826 2827 if (throw_illegal_thread_state) { 2828 THROW(vmSymbols::java_lang_IllegalThreadStateException()); 2829 } 2830 2831 assert(native_thread != NULL, "Starting null thread?"); 2832 2833 if (native_thread->osthread() == NULL) { 2834 // No one should hold a reference to the 'native_thread'. 2835 delete native_thread; 2836 if (JvmtiExport::should_post_resource_exhausted()) { 2837 JvmtiExport::post_resource_exhausted( 2838 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS, 2839 "unable to create new native thread"); 2840 } 2841 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), 2842 "unable to create new native thread"); 2843 } 2844 2845 Thread::start(native_thread); 2846 2847JVM_END 2848 2849// JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints 2850// before the quasi-asynchronous exception is delivered. This is a little obtrusive, 2851// but is thought to be reliable and simple. In the case, where the receiver is the 2852// same thread as the sender, no safepoint is needed. 2853JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable)) 2854 JVMWrapper("JVM_StopThread"); 2855 2856 oop java_throwable = JNIHandles::resolve(throwable); 2857 if (java_throwable == NULL) { 2858 THROW(vmSymbols::java_lang_NullPointerException()); 2859 } 2860 oop java_thread = JNIHandles::resolve_non_null(jthread); 2861 JavaThread* receiver = java_lang_Thread::thread(java_thread); 2862 Events::log_exception(JavaThread::current(), 2863 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", 2864 receiver, (address)java_thread, throwable); 2865 // First check if thread is alive 2866 if (receiver != NULL) { 2867 // Check if exception is getting thrown at self (use oop equality, since the 2868 // target object might exit) 2869 if (java_thread == thread->threadObj()) { 2870 THROW_OOP(java_throwable); 2871 } else { 2872 // Enques a VM_Operation to stop all threads and then deliver the exception... 2873 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable)); 2874 } 2875 } 2876 else { 2877 // Either: 2878 // - target thread has not been started before being stopped, or 2879 // - target thread already terminated 2880 // We could read the threadStatus to determine which case it is 2881 // but that is overkill as it doesn't matter. We must set the 2882 // stillborn flag for the first case, and if the thread has already 2883 // exited setting this flag has no affect 2884 java_lang_Thread::set_stillborn(java_thread); 2885 } 2886JVM_END 2887 2888 2889JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread)) 2890 JVMWrapper("JVM_IsThreadAlive"); 2891 2892 oop thread_oop = JNIHandles::resolve_non_null(jthread); 2893 return java_lang_Thread::is_alive(thread_oop); 2894JVM_END 2895 2896 2897JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread)) 2898 JVMWrapper("JVM_SuspendThread"); 2899 oop java_thread = JNIHandles::resolve_non_null(jthread); 2900 JavaThread* receiver = java_lang_Thread::thread(java_thread); 2901 2902 if (receiver != NULL) { 2903 // thread has run and has not exited (still on threads list) 2904 2905 { 2906 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag); 2907 if (receiver->is_external_suspend()) { 2908 // Don't allow nested external suspend requests. We can't return 2909 // an error from this interface so just ignore the problem. 2910 return; 2911 } 2912 if (receiver->is_exiting()) { // thread is in the process of exiting 2913 return; 2914 } 2915 receiver->set_external_suspend(); 2916 } 2917 2918 // java_suspend() will catch threads in the process of exiting 2919 // and will ignore them. 2920 receiver->java_suspend(); 2921 2922 // It would be nice to have the following assertion in all the 2923 // time, but it is possible for a racing resume request to have 2924 // resumed this thread right after we suspended it. Temporarily 2925 // enable this assertion if you are chasing a different kind of 2926 // bug. 2927 // 2928 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL || 2929 // receiver->is_being_ext_suspended(), "thread is not suspended"); 2930 } 2931JVM_END 2932 2933 2934JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread)) 2935 JVMWrapper("JVM_ResumeThread"); 2936 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate. 2937 // We need to *always* get the threads lock here, since this operation cannot be allowed during 2938 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other 2939 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code 2940 // looks at it. 2941 MutexLocker ml(Threads_lock); 2942 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 2943 if (thr != NULL) { 2944 // the thread has run and is not in the process of exiting 2945 thr->java_resume(); 2946 } 2947JVM_END 2948 2949 2950JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio)) 2951 JVMWrapper("JVM_SetThreadPriority"); 2952 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 2953 MutexLocker ml(Threads_lock); 2954 oop java_thread = JNIHandles::resolve_non_null(jthread); 2955 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio); 2956 JavaThread* thr = java_lang_Thread::thread(java_thread); 2957 if (thr != NULL) { // Thread not yet started; priority pushed down when it is 2958 Thread::set_priority(thr, (ThreadPriority)prio); 2959 } 2960JVM_END 2961 2962 2963JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass)) 2964 JVMWrapper("JVM_Yield"); 2965 if (os::dont_yield()) return; 2966#ifndef USDT2 2967 HS_DTRACE_PROBE0(hotspot, thread__yield); 2968#else /* USDT2 */ 2969 HOTSPOT_THREAD_YIELD(); 2970#endif /* USDT2 */ 2971 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield. 2972 // Critical for similar threading behaviour 2973 if (ConvertYieldToSleep) { 2974 os::sleep(thread, MinSleepInterval, false); 2975 } else { 2976 os::yield(); 2977 } 2978JVM_END 2979 2980 2981JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis)) 2982 JVMWrapper("JVM_Sleep"); 2983 2984 if (millis < 0) { 2985 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative"); 2986 } 2987 2988 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) { 2989 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); 2990 } 2991 2992 // Save current thread state and restore it at the end of this block. 2993 // And set new thread state to SLEEPING. 2994 JavaThreadSleepState jtss(thread); 2995 2996#ifndef USDT2 2997 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis); 2998#else /* USDT2 */ 2999 HOTSPOT_THREAD_SLEEP_BEGIN( 3000 millis); 3001#endif /* USDT2 */ 3002 3003 EventThreadSleep event; 3004 3005 if (millis == 0) { 3006 // When ConvertSleepToYield is on, this matches the classic VM implementation of 3007 // JVM_Sleep. Critical for similar threading behaviour (Win32) 3008 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep 3009 // for SOLARIS 3010 if (ConvertSleepToYield) { 3011 os::yield(); 3012 } else { 3013 ThreadState old_state = thread->osthread()->get_state(); 3014 thread->osthread()->set_state(SLEEPING); 3015 os::sleep(thread, MinSleepInterval, false); 3016 thread->osthread()->set_state(old_state); 3017 } 3018 } else { 3019 ThreadState old_state = thread->osthread()->get_state(); 3020 thread->osthread()->set_state(SLEEPING); 3021 if (os::sleep(thread, millis, true) == OS_INTRPT) { 3022 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on 3023 // us while we were sleeping. We do not overwrite those. 3024 if (!HAS_PENDING_EXCEPTION) { 3025 if (event.should_commit()) { 3026 event.set_time(millis); 3027 event.commit(); 3028 } 3029#ifndef USDT2 3030 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1); 3031#else /* USDT2 */ 3032 HOTSPOT_THREAD_SLEEP_END( 3033 1); 3034#endif /* USDT2 */ 3035 // TODO-FIXME: THROW_MSG returns which means we will not call set_state() 3036 // to properly restore the thread state. That's likely wrong. 3037 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); 3038 } 3039 } 3040 thread->osthread()->set_state(old_state); 3041 } 3042 if (event.should_commit()) { 3043 event.set_time(millis); 3044 event.commit(); 3045 } 3046#ifndef USDT2 3047 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0); 3048#else /* USDT2 */ 3049 HOTSPOT_THREAD_SLEEP_END( 3050 0); 3051#endif /* USDT2 */ 3052JVM_END 3053 3054JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass)) 3055 JVMWrapper("JVM_CurrentThread"); 3056 oop jthread = thread->threadObj(); 3057 assert (thread != NULL, "no current thread!"); 3058 return JNIHandles::make_local(env, jthread); 3059JVM_END 3060 3061 3062JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread)) 3063 JVMWrapper("JVM_CountStackFrames"); 3064 3065 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 3066 oop java_thread = JNIHandles::resolve_non_null(jthread); 3067 bool throw_illegal_thread_state = false; 3068 int count = 0; 3069 3070 { 3071 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 3072 // We need to re-resolve the java_thread, since a GC might have happened during the 3073 // acquire of the lock 3074 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 3075 3076 if (thr == NULL) { 3077 // do nothing 3078 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) { 3079 // Check whether this java thread has been suspended already. If not, throws 3080 // IllegalThreadStateException. We defer to throw that exception until 3081 // Threads_lock is released since loading exception class has to leave VM. 3082 // The correct way to test a thread is actually suspended is 3083 // wait_for_ext_suspend_completion(), but we can't call that while holding 3084 // the Threads_lock. The above tests are sufficient for our purposes 3085 // provided the walkability of the stack is stable - which it isn't 3086 // 100% but close enough for most practical purposes. 3087 throw_illegal_thread_state = true; 3088 } else { 3089 // Count all java activation, i.e., number of vframes 3090 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) { 3091 // Native frames are not counted 3092 if (!vfst.method()->is_native()) count++; 3093 } 3094 } 3095 } 3096 3097 if (throw_illegal_thread_state) { 3098 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(), 3099 "this thread is not suspended"); 3100 } 3101 return count; 3102JVM_END 3103 3104// Consider: A better way to implement JVM_Interrupt() is to acquire 3105// Threads_lock to resolve the jthread into a Thread pointer, fetch 3106// Thread->platformevent, Thread->native_thr, Thread->parker, etc., 3107// drop Threads_lock, and the perform the unpark() and thr_kill() operations 3108// outside the critical section. Threads_lock is hot so we want to minimize 3109// the hold-time. A cleaner interface would be to decompose interrupt into 3110// two steps. The 1st phase, performed under Threads_lock, would return 3111// a closure that'd be invoked after Threads_lock was dropped. 3112// This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and 3113// admit spurious wakeups. 3114 3115JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread)) 3116 JVMWrapper("JVM_Interrupt"); 3117 3118 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 3119 oop java_thread = JNIHandles::resolve_non_null(jthread); 3120 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 3121 // We need to re-resolve the java_thread, since a GC might have happened during the 3122 // acquire of the lock 3123 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 3124 if (thr != NULL) { 3125 Thread::interrupt(thr); 3126 } 3127JVM_END 3128 3129 3130JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted)) 3131 JVMWrapper("JVM_IsInterrupted"); 3132 3133 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate 3134 oop java_thread = JNIHandles::resolve_non_null(jthread); 3135 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock); 3136 // We need to re-resolve the java_thread, since a GC might have happened during the 3137 // acquire of the lock 3138 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)); 3139 if (thr == NULL) { 3140 return JNI_FALSE; 3141 } else { 3142 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0); 3143 } 3144JVM_END 3145 3146 3147// Return true iff the current thread has locked the object passed in 3148 3149JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj)) 3150 JVMWrapper("JVM_HoldsLock"); 3151 assert(THREAD->is_Java_thread(), "sanity check"); 3152 if (obj == NULL) { 3153 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); 3154 } 3155 Handle h_obj(THREAD, JNIHandles::resolve(obj)); 3156 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj); 3157JVM_END 3158 3159 3160JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass)) 3161 JVMWrapper("JVM_DumpAllStacks"); 3162 VM_PrintThreads op; 3163 VMThread::execute(&op); 3164 if (JvmtiExport::should_post_data_dump()) { 3165 JvmtiExport::post_data_dump(); 3166 } 3167JVM_END 3168 3169JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name)) 3170 JVMWrapper("JVM_SetNativeThreadName"); 3171 ResourceMark rm(THREAD); 3172 oop java_thread = JNIHandles::resolve_non_null(jthread); 3173 JavaThread* thr = java_lang_Thread::thread(java_thread); 3174 // Thread naming only supported for the current thread, doesn't work for 3175 // target threads. 3176 if (Thread::current() == thr && !thr->has_attached_via_jni()) { 3177 // we don't set the name of an attached thread to avoid stepping 3178 // on other programs 3179 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); 3180 os::set_native_thread_name(thread_name); 3181 } 3182JVM_END 3183 3184// java.lang.SecurityManager /////////////////////////////////////////////////////////////////////// 3185 3186static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) { 3187 assert(jthread->is_Java_thread(), "must be a Java thread"); 3188 if (jthread->privileged_stack_top() == NULL) return false; 3189 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) { 3190 oop loader = jthread->privileged_stack_top()->class_loader(); 3191 if (loader == NULL) return true; 3192 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); 3193 if (trusted) return true; 3194 } 3195 return false; 3196} 3197 3198JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env)) 3199 JVMWrapper("JVM_CurrentLoadedClass"); 3200 ResourceMark rm(THREAD); 3201 3202 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3203 // if a method in a class in a trusted loader is in a doPrivileged, return NULL 3204 bool trusted = is_trusted_frame(thread, &vfst); 3205 if (trusted) return NULL; 3206 3207 Method* m = vfst.method(); 3208 if (!m->is_native()) { 3209 InstanceKlass* holder = m->method_holder(); 3210 oop loader = holder->class_loader(); 3211 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3212 return (jclass) JNIHandles::make_local(env, holder->java_mirror()); 3213 } 3214 } 3215 } 3216 return NULL; 3217JVM_END 3218 3219 3220JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env)) 3221 JVMWrapper("JVM_CurrentClassLoader"); 3222 ResourceMark rm(THREAD); 3223 3224 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3225 3226 // if a method in a class in a trusted loader is in a doPrivileged, return NULL 3227 bool trusted = is_trusted_frame(thread, &vfst); 3228 if (trusted) return NULL; 3229 3230 Method* m = vfst.method(); 3231 if (!m->is_native()) { 3232 InstanceKlass* holder = m->method_holder(); 3233 assert(holder->is_klass(), "just checking"); 3234 oop loader = holder->class_loader(); 3235 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3236 return JNIHandles::make_local(env, loader); 3237 } 3238 } 3239 } 3240 return NULL; 3241JVM_END 3242 3243 3244// Utility object for collecting method holders walking down the stack 3245class KlassLink: public ResourceObj { 3246 public: 3247 KlassHandle klass; 3248 KlassLink* next; 3249 3250 KlassLink(KlassHandle k) { klass = k; next = NULL; } 3251}; 3252 3253 3254JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env)) 3255 JVMWrapper("JVM_GetClassContext"); 3256 ResourceMark rm(THREAD); 3257 JvmtiVMObjectAllocEventCollector oam; 3258 // Collect linked list of (handles to) method holders 3259 KlassLink* first = NULL; 3260 KlassLink* last = NULL; 3261 int depth = 0; 3262 vframeStream vfst(thread); 3263 3264 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) { 3265 // This must only be called from SecurityManager.getClassContext 3266 Method* m = vfst.method(); 3267 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() && 3268 m->name() == vmSymbols::getClassContext_name() && 3269 m->signature() == vmSymbols::void_class_array_signature())) { 3270 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext"); 3271 } 3272 } 3273 3274 // Collect method holders 3275 for (; !vfst.at_end(); vfst.security_next()) { 3276 Method* m = vfst.method(); 3277 // Native frames are not returned 3278 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) { 3279 Klass* holder = m->method_holder(); 3280 assert(holder->is_klass(), "just checking"); 3281 depth++; 3282 KlassLink* l = new KlassLink(KlassHandle(thread, holder)); 3283 if (first == NULL) { 3284 first = last = l; 3285 } else { 3286 last->next = l; 3287 last = l; 3288 } 3289 } 3290 } 3291 3292 // Create result array of type [Ljava/lang/Class; 3293 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), depth, CHECK_NULL); 3294 // Fill in mirrors corresponding to method holders 3295 int index = 0; 3296 while (first != NULL) { 3297 result->obj_at_put(index++, first->klass()->java_mirror()); 3298 first = first->next; 3299 } 3300 assert(index == depth, "just checking"); 3301 3302 return (jobjectArray) JNIHandles::make_local(env, result); 3303JVM_END 3304 3305 3306JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name)) 3307 JVMWrapper("JVM_ClassDepth"); 3308 ResourceMark rm(THREAD); 3309 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); 3310 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0); 3311 3312 const char* str = java_lang_String::as_utf8_string(class_name_str()); 3313 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str)); 3314 if (class_name_sym == NULL) { 3315 return -1; 3316 } 3317 3318 int depth = 0; 3319 3320 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3321 if (!vfst.method()->is_native()) { 3322 InstanceKlass* holder = vfst.method()->method_holder(); 3323 assert(holder->is_klass(), "just checking"); 3324 if (holder->name() == class_name_sym) { 3325 return depth; 3326 } 3327 depth++; 3328 } 3329 } 3330 return -1; 3331JVM_END 3332 3333 3334JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env)) 3335 JVMWrapper("JVM_ClassLoaderDepth"); 3336 ResourceMark rm(THREAD); 3337 int depth = 0; 3338 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3339 // if a method in a class in a trusted loader is in a doPrivileged, return -1 3340 bool trusted = is_trusted_frame(thread, &vfst); 3341 if (trusted) return -1; 3342 3343 Method* m = vfst.method(); 3344 if (!m->is_native()) { 3345 InstanceKlass* holder = m->method_holder(); 3346 assert(holder->is_klass(), "just checking"); 3347 oop loader = holder->class_loader(); 3348 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) { 3349 return depth; 3350 } 3351 depth++; 3352 } 3353 } 3354 return -1; 3355JVM_END 3356 3357 3358// java.lang.Package //////////////////////////////////////////////////////////////// 3359 3360 3361JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name)) 3362 JVMWrapper("JVM_GetSystemPackage"); 3363 ResourceMark rm(THREAD); 3364 JvmtiVMObjectAllocEventCollector oam; 3365 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); 3366 oop result = ClassLoader::get_system_package(str, CHECK_NULL); 3367 return (jstring) JNIHandles::make_local(result); 3368JVM_END 3369 3370 3371JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env)) 3372 JVMWrapper("JVM_GetSystemPackages"); 3373 JvmtiVMObjectAllocEventCollector oam; 3374 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL); 3375 return (jobjectArray) JNIHandles::make_local(result); 3376JVM_END 3377 3378 3379// ObjectInputStream /////////////////////////////////////////////////////////////// 3380 3381bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) { 3382 if (current_class == NULL) { 3383 return true; 3384 } 3385 if ((current_class == field_class) || access.is_public()) { 3386 return true; 3387 } 3388 3389 if (access.is_protected()) { 3390 // See if current_class is a subclass of field_class 3391 if (current_class->is_subclass_of(field_class)) { 3392 return true; 3393 } 3394 } 3395 3396 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class)); 3397} 3398 3399 3400// JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4 3401JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass)) 3402 JVMWrapper("JVM_AllocateNewObject"); 3403 JvmtiVMObjectAllocEventCollector oam; 3404 // Receiver is not used 3405 oop curr_mirror = JNIHandles::resolve_non_null(currClass); 3406 oop init_mirror = JNIHandles::resolve_non_null(initClass); 3407 3408 // Cannot instantiate primitive types 3409 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) { 3410 ResourceMark rm(THREAD); 3411 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3412 } 3413 3414 // Arrays not allowed here, must use JVM_AllocateNewArray 3415 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() || 3416 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) { 3417 ResourceMark rm(THREAD); 3418 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3419 } 3420 3421 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror)); 3422 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror)); 3423 3424 assert(curr_klass->is_subclass_of(init_klass()), "just checking"); 3425 3426 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly. 3427 curr_klass->check_valid_for_instantiation(false, CHECK_NULL); 3428 3429 // Make sure klass is initialized, since we are about to instantiate one of them. 3430 curr_klass->initialize(CHECK_NULL); 3431 3432 methodHandle m (THREAD, 3433 init_klass->find_method(vmSymbols::object_initializer_name(), 3434 vmSymbols::void_method_signature())); 3435 if (m.is_null()) { 3436 ResourceMark rm(THREAD); 3437 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(), 3438 Method::name_and_sig_as_C_string(init_klass(), 3439 vmSymbols::object_initializer_name(), 3440 vmSymbols::void_method_signature())); 3441 } 3442 3443 if (curr_klass == init_klass && !m->is_public()) { 3444 // Calling the constructor for class 'curr_klass'. 3445 // Only allow calls to a public no-arg constructor. 3446 // This path corresponds to creating an Externalizable object. 3447 THROW_0(vmSymbols::java_lang_IllegalAccessException()); 3448 } 3449 3450 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) { 3451 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb' 3452 THROW_0(vmSymbols::java_lang_IllegalAccessException()); 3453 } 3454 3455 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL); 3456 // Call constructor m. This might call a constructor higher up in the hierachy 3457 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL); 3458 3459 return JNIHandles::make_local(obj()); 3460JVM_END 3461 3462 3463JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length)) 3464 JVMWrapper("JVM_AllocateNewArray"); 3465 JvmtiVMObjectAllocEventCollector oam; 3466 oop mirror = JNIHandles::resolve_non_null(currClass); 3467 3468 if (java_lang_Class::is_primitive(mirror)) { 3469 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3470 } 3471 Klass* k = java_lang_Class::as_Klass(mirror); 3472 oop result; 3473 3474 if (k->oop_is_typeArray()) { 3475 // typeArray 3476 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL); 3477 } else if (k->oop_is_objArray()) { 3478 // objArray 3479 ObjArrayKlass* oak = ObjArrayKlass::cast(k); 3480 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior) 3481 result = oak->allocate(length, CHECK_NULL); 3482 } else { 3483 THROW_0(vmSymbols::java_lang_InvalidClassException()); 3484 } 3485 return JNIHandles::make_local(env, result); 3486JVM_END 3487 3488 3489// Return the first non-null class loader up the execution stack, or null 3490// if only code from the null class loader is on the stack. 3491 3492JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env)) 3493 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3494 // UseNewReflection 3495 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection 3496 oop loader = vfst.method()->method_holder()->class_loader(); 3497 if (loader != NULL) { 3498 return JNIHandles::make_local(env, loader); 3499 } 3500 } 3501 return NULL; 3502JVM_END 3503 3504 3505// Load a class relative to the most recent class on the stack with a non-null 3506// classloader. 3507// This function has been deprecated and should not be considered part of the 3508// specified JVM interface. 3509 3510JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver, 3511 jclass currClass, jstring currClassName)) 3512 JVMWrapper("JVM_LoadClass0"); 3513 // Receiver is not used 3514 ResourceMark rm(THREAD); 3515 3516 // Class name argument is not guaranteed to be in internal format 3517 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName)); 3518 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL); 3519 3520 const char* str = java_lang_String::as_utf8_string(string()); 3521 3522 if (str == NULL || (int)strlen(str) > Symbol::max_length()) { 3523 // It's impossible to create this class; the name cannot fit 3524 // into the constant pool. 3525 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str); 3526 } 3527 3528 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL); 3529 Handle curr_klass (THREAD, JNIHandles::resolve(currClass)); 3530 // Find the most recent class on the stack with a non-null classloader 3531 oop loader = NULL; 3532 oop protection_domain = NULL; 3533 if (curr_klass.is_null()) { 3534 for (vframeStream vfst(thread); 3535 !vfst.at_end() && loader == NULL; 3536 vfst.next()) { 3537 if (!vfst.method()->is_native()) { 3538 InstanceKlass* holder = vfst.method()->method_holder(); 3539 loader = holder->class_loader(); 3540 protection_domain = holder->protection_domain(); 3541 } 3542 } 3543 } else { 3544 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass()); 3545 loader = InstanceKlass::cast(curr_klass_oop)->class_loader(); 3546 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain(); 3547 } 3548 Handle h_loader(THREAD, loader); 3549 Handle h_prot (THREAD, protection_domain); 3550 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot, 3551 false, thread); 3552 if (TraceClassResolution && result != NULL) { 3553 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 3554 } 3555 return result; 3556JVM_END 3557 3558 3559// Array /////////////////////////////////////////////////////////////////////////////////////////// 3560 3561 3562// resolve array handle and check arguments 3563static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) { 3564 if (arr == NULL) { 3565 THROW_0(vmSymbols::java_lang_NullPointerException()); 3566 } 3567 oop a = JNIHandles::resolve_non_null(arr); 3568 if (!a->is_array() || (type_array_only && !a->is_typeArray())) { 3569 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array"); 3570 } 3571 return arrayOop(a); 3572} 3573 3574 3575JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr)) 3576 JVMWrapper("JVM_GetArrayLength"); 3577 arrayOop a = check_array(env, arr, false, CHECK_0); 3578 return a->length(); 3579JVM_END 3580 3581 3582JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index)) 3583 JVMWrapper("JVM_Array_Get"); 3584 JvmtiVMObjectAllocEventCollector oam; 3585 arrayOop a = check_array(env, arr, false, CHECK_NULL); 3586 jvalue value; 3587 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL); 3588 oop box = Reflection::box(&value, type, CHECK_NULL); 3589 return JNIHandles::make_local(env, box); 3590JVM_END 3591 3592 3593JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode)) 3594 JVMWrapper("JVM_GetPrimitiveArrayElement"); 3595 jvalue value; 3596 value.i = 0; // to initialize value before getting used in CHECK 3597 arrayOop a = check_array(env, arr, true, CHECK_(value)); 3598 assert(a->is_typeArray(), "just checking"); 3599 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value)); 3600 BasicType wide_type = (BasicType) wCode; 3601 if (type != wide_type) { 3602 Reflection::widen(&value, type, wide_type, CHECK_(value)); 3603 } 3604 return value; 3605JVM_END 3606 3607 3608JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val)) 3609 JVMWrapper("JVM_SetArrayElement"); 3610 arrayOop a = check_array(env, arr, false, CHECK); 3611 oop box = JNIHandles::resolve(val); 3612 jvalue value; 3613 value.i = 0; // to initialize value before getting used in CHECK 3614 BasicType value_type; 3615 if (a->is_objArray()) { 3616 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array 3617 value_type = Reflection::unbox_for_regular_object(box, &value); 3618 } else { 3619 value_type = Reflection::unbox_for_primitive(box, &value, CHECK); 3620 } 3621 Reflection::array_set(&value, a, index, value_type, CHECK); 3622JVM_END 3623 3624 3625JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode)) 3626 JVMWrapper("JVM_SetPrimitiveArrayElement"); 3627 arrayOop a = check_array(env, arr, true, CHECK); 3628 assert(a->is_typeArray(), "just checking"); 3629 BasicType value_type = (BasicType) vCode; 3630 Reflection::array_set(&v, a, index, value_type, CHECK); 3631JVM_END 3632 3633 3634JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length)) 3635 JVMWrapper("JVM_NewArray"); 3636 JvmtiVMObjectAllocEventCollector oam; 3637 oop element_mirror = JNIHandles::resolve(eltClass); 3638 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL); 3639 return JNIHandles::make_local(env, result); 3640JVM_END 3641 3642 3643JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim)) 3644 JVMWrapper("JVM_NewMultiArray"); 3645 JvmtiVMObjectAllocEventCollector oam; 3646 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL); 3647 oop element_mirror = JNIHandles::resolve(eltClass); 3648 assert(dim_array->is_typeArray(), "just checking"); 3649 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL); 3650 return JNIHandles::make_local(env, result); 3651JVM_END 3652 3653 3654// Networking library support //////////////////////////////////////////////////////////////////// 3655 3656JVM_LEAF(jint, JVM_InitializeSocketLibrary()) 3657 JVMWrapper("JVM_InitializeSocketLibrary"); 3658 return 0; 3659JVM_END 3660 3661 3662JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol)) 3663 JVMWrapper("JVM_Socket"); 3664 return os::socket(domain, type, protocol); 3665JVM_END 3666 3667 3668JVM_LEAF(jint, JVM_SocketClose(jint fd)) 3669 JVMWrapper2("JVM_SocketClose (0x%x)", fd); 3670 //%note jvm_r6 3671 return os::socket_close(fd); 3672JVM_END 3673 3674 3675JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto)) 3676 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd); 3677 //%note jvm_r6 3678 return os::socket_shutdown(fd, howto); 3679JVM_END 3680 3681 3682JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags)) 3683 JVMWrapper2("JVM_Recv (0x%x)", fd); 3684 //%note jvm_r6 3685 return os::recv(fd, buf, (size_t)nBytes, (uint)flags); 3686JVM_END 3687 3688 3689JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags)) 3690 JVMWrapper2("JVM_Send (0x%x)", fd); 3691 //%note jvm_r6 3692 return os::send(fd, buf, (size_t)nBytes, (uint)flags); 3693JVM_END 3694 3695 3696JVM_LEAF(jint, JVM_Timeout(int fd, long timeout)) 3697 JVMWrapper2("JVM_Timeout (0x%x)", fd); 3698 //%note jvm_r6 3699 return os::timeout(fd, timeout); 3700JVM_END 3701 3702 3703JVM_LEAF(jint, JVM_Listen(jint fd, jint count)) 3704 JVMWrapper2("JVM_Listen (0x%x)", fd); 3705 //%note jvm_r6 3706 return os::listen(fd, count); 3707JVM_END 3708 3709 3710JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len)) 3711 JVMWrapper2("JVM_Connect (0x%x)", fd); 3712 //%note jvm_r6 3713 return os::connect(fd, him, (socklen_t)len); 3714JVM_END 3715 3716 3717JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len)) 3718 JVMWrapper2("JVM_Bind (0x%x)", fd); 3719 //%note jvm_r6 3720 return os::bind(fd, him, (socklen_t)len); 3721JVM_END 3722 3723 3724JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len)) 3725 JVMWrapper2("JVM_Accept (0x%x)", fd); 3726 //%note jvm_r6 3727 socklen_t socklen = (socklen_t)(*len); 3728 jint result = os::accept(fd, him, &socklen); 3729 *len = (jint)socklen; 3730 return result; 3731JVM_END 3732 3733 3734JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen)) 3735 JVMWrapper2("JVM_RecvFrom (0x%x)", fd); 3736 //%note jvm_r6 3737 socklen_t socklen = (socklen_t)(*fromlen); 3738 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen); 3739 *fromlen = (int)socklen; 3740 return result; 3741JVM_END 3742 3743 3744JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len)) 3745 JVMWrapper2("JVM_GetSockName (0x%x)", fd); 3746 //%note jvm_r6 3747 socklen_t socklen = (socklen_t)(*len); 3748 jint result = os::get_sock_name(fd, him, &socklen); 3749 *len = (int)socklen; 3750 return result; 3751JVM_END 3752 3753 3754JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen)) 3755 JVMWrapper2("JVM_SendTo (0x%x)", fd); 3756 //%note jvm_r6 3757 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen); 3758JVM_END 3759 3760 3761JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes)) 3762 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd); 3763 //%note jvm_r6 3764 return os::socket_available(fd, pbytes); 3765JVM_END 3766 3767 3768JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen)) 3769 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); 3770 //%note jvm_r6 3771 socklen_t socklen = (socklen_t)(*optlen); 3772 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen); 3773 *optlen = (int)socklen; 3774 return result; 3775JVM_END 3776 3777 3778JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen)) 3779 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd); 3780 //%note jvm_r6 3781 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen); 3782JVM_END 3783 3784 3785JVM_LEAF(int, JVM_GetHostName(char* name, int namelen)) 3786 JVMWrapper("JVM_GetHostName"); 3787 return os::get_host_name(name, namelen); 3788JVM_END 3789 3790 3791// Library support /////////////////////////////////////////////////////////////////////////// 3792 3793JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name)) 3794 //%note jvm_ct 3795 JVMWrapper2("JVM_LoadLibrary (%s)", name); 3796 char ebuf[1024]; 3797 void *load_result; 3798 { 3799 ThreadToNativeFromVM ttnfvm(thread); 3800 load_result = os::dll_load(name, ebuf, sizeof ebuf); 3801 } 3802 if (load_result == NULL) { 3803 char msg[1024]; 3804 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf); 3805 // Since 'ebuf' may contain a string encoded using 3806 // platform encoding scheme, we need to pass 3807 // Exceptions::unsafe_to_utf8 to the new_exception method 3808 // as the last argument. See bug 6367357. 3809 Handle h_exception = 3810 Exceptions::new_exception(thread, 3811 vmSymbols::java_lang_UnsatisfiedLinkError(), 3812 msg, Exceptions::unsafe_to_utf8); 3813 3814 THROW_HANDLE_0(h_exception); 3815 } 3816 return load_result; 3817JVM_END 3818 3819 3820JVM_LEAF(void, JVM_UnloadLibrary(void* handle)) 3821 JVMWrapper("JVM_UnloadLibrary"); 3822 os::dll_unload(handle); 3823JVM_END 3824 3825 3826JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name)) 3827 JVMWrapper2("JVM_FindLibraryEntry (%s)", name); 3828 return os::dll_lookup(handle, name); 3829JVM_END 3830 3831 3832// Floating point support //////////////////////////////////////////////////////////////////// 3833 3834JVM_LEAF(jboolean, JVM_IsNaN(jdouble a)) 3835 JVMWrapper("JVM_IsNaN"); 3836 return g_isnan(a); 3837JVM_END 3838 3839 3840// JNI version /////////////////////////////////////////////////////////////////////////////// 3841 3842JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version)) 3843 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version); 3844 return Threads::is_supported_jni_version_including_1_1(version); 3845JVM_END 3846 3847 3848// String support /////////////////////////////////////////////////////////////////////////// 3849 3850JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str)) 3851 JVMWrapper("JVM_InternString"); 3852 JvmtiVMObjectAllocEventCollector oam; 3853 if (str == NULL) return NULL; 3854 oop string = JNIHandles::resolve_non_null(str); 3855 oop result = StringTable::intern(string, CHECK_NULL); 3856 return (jstring) JNIHandles::make_local(env, result); 3857JVM_END 3858 3859 3860// Raw monitor support ////////////////////////////////////////////////////////////////////// 3861 3862// The lock routine below calls lock_without_safepoint_check in order to get a raw lock 3863// without interfering with the safepoint mechanism. The routines are not JVM_LEAF because 3864// they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check 3865// that only works with java threads. 3866 3867 3868JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) { 3869 VM_Exit::block_if_vm_exited(); 3870 JVMWrapper("JVM_RawMonitorCreate"); 3871 return new Mutex(Mutex::native, "JVM_RawMonitorCreate"); 3872} 3873 3874 3875JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) { 3876 VM_Exit::block_if_vm_exited(); 3877 JVMWrapper("JVM_RawMonitorDestroy"); 3878 delete ((Mutex*) mon); 3879} 3880 3881 3882JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) { 3883 VM_Exit::block_if_vm_exited(); 3884 JVMWrapper("JVM_RawMonitorEnter"); 3885 ((Mutex*) mon)->jvm_raw_lock(); 3886 return 0; 3887} 3888 3889 3890JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) { 3891 VM_Exit::block_if_vm_exited(); 3892 JVMWrapper("JVM_RawMonitorExit"); 3893 ((Mutex*) mon)->jvm_raw_unlock(); 3894} 3895 3896 3897// Support for Serialization 3898 3899typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value); 3900typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value); 3901typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value); 3902typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value); 3903 3904static IntBitsToFloatFn int_bits_to_float_fn = NULL; 3905static LongBitsToDoubleFn long_bits_to_double_fn = NULL; 3906static FloatToIntBitsFn float_to_int_bits_fn = NULL; 3907static DoubleToLongBitsFn double_to_long_bits_fn = NULL; 3908 3909 3910void initialize_converter_functions() { 3911 if (JDK_Version::is_gte_jdk14x_version()) { 3912 // These functions only exist for compatibility with 1.3.1 and earlier 3913 return; 3914 } 3915 3916 // called from universe_post_init() 3917 assert( 3918 int_bits_to_float_fn == NULL && 3919 long_bits_to_double_fn == NULL && 3920 float_to_int_bits_fn == NULL && 3921 double_to_long_bits_fn == NULL , 3922 "initialization done twice" 3923 ); 3924 // initialize 3925 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F")); 3926 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D")); 3927 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I")); 3928 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J")); 3929 // verify 3930 assert( 3931 int_bits_to_float_fn != NULL && 3932 long_bits_to_double_fn != NULL && 3933 float_to_int_bits_fn != NULL && 3934 double_to_long_bits_fn != NULL , 3935 "initialization failed" 3936 ); 3937} 3938 3939 3940// Serialization 3941JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj, 3942 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data)) 3943 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier"); 3944 3945 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes)); 3946 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data)); 3947 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs)); 3948 oop o = JNIHandles::resolve(obj); 3949 3950 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) { 3951 THROW(vmSymbols::java_lang_NullPointerException()); 3952 } 3953 3954 jsize nfids = fids->length(); 3955 if (nfids == 0) return; 3956 3957 if (tcodes->length() < nfids) { 3958 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); 3959 } 3960 3961 jsize off = 0; 3962 /* loop through fields, setting values */ 3963 for (jsize i = 0; i < nfids; i++) { 3964 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i); 3965 int field_offset; 3966 if (fid != NULL) { 3967 // NULL is a legal value for fid, but retrieving the field offset 3968 // trigger assertion in that case 3969 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); 3970 } 3971 3972 switch (tcodes->char_at(i)) { 3973 case 'Z': 3974 if (fid != NULL) { 3975 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE; 3976 o->bool_field_put(field_offset, val); 3977 } 3978 off++; 3979 break; 3980 3981 case 'B': 3982 if (fid != NULL) { 3983 o->byte_field_put(field_offset, dbuf->byte_at(off)); 3984 } 3985 off++; 3986 break; 3987 3988 case 'C': 3989 if (fid != NULL) { 3990 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8) 3991 + ((dbuf->byte_at(off + 1) & 0xFF) << 0); 3992 o->char_field_put(field_offset, val); 3993 } 3994 off += 2; 3995 break; 3996 3997 case 'S': 3998 if (fid != NULL) { 3999 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8) 4000 + ((dbuf->byte_at(off + 1) & 0xFF) << 0); 4001 o->short_field_put(field_offset, val); 4002 } 4003 off += 2; 4004 break; 4005 4006 case 'I': 4007 if (fid != NULL) { 4008 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24) 4009 + ((dbuf->byte_at(off + 1) & 0xFF) << 16) 4010 + ((dbuf->byte_at(off + 2) & 0xFF) << 8) 4011 + ((dbuf->byte_at(off + 3) & 0xFF) << 0); 4012 o->int_field_put(field_offset, ival); 4013 } 4014 off += 4; 4015 break; 4016 4017 case 'F': 4018 if (fid != NULL) { 4019 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24) 4020 + ((dbuf->byte_at(off + 1) & 0xFF) << 16) 4021 + ((dbuf->byte_at(off + 2) & 0xFF) << 8) 4022 + ((dbuf->byte_at(off + 3) & 0xFF) << 0); 4023 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival); 4024 o->float_field_put(field_offset, fval); 4025 } 4026 off += 4; 4027 break; 4028 4029 case 'J': 4030 if (fid != NULL) { 4031 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56) 4032 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48) 4033 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40) 4034 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32) 4035 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24) 4036 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16) 4037 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8) 4038 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0); 4039 o->long_field_put(field_offset, lval); 4040 } 4041 off += 8; 4042 break; 4043 4044 case 'D': 4045 if (fid != NULL) { 4046 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56) 4047 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48) 4048 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40) 4049 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32) 4050 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24) 4051 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16) 4052 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8) 4053 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0); 4054 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval); 4055 o->double_field_put(field_offset, dval); 4056 } 4057 off += 8; 4058 break; 4059 4060 default: 4061 // Illegal typecode 4062 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode"); 4063 } 4064 } 4065JVM_END 4066 4067 4068JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj, 4069 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data)) 4070 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier"); 4071 4072 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes)); 4073 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data)); 4074 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs)); 4075 oop o = JNIHandles::resolve(obj); 4076 4077 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) { 4078 THROW(vmSymbols::java_lang_NullPointerException()); 4079 } 4080 4081 jsize nfids = fids->length(); 4082 if (nfids == 0) return; 4083 4084 if (tcodes->length() < nfids) { 4085 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException()); 4086 } 4087 4088 /* loop through fields, fetching values */ 4089 jsize off = 0; 4090 for (jsize i = 0; i < nfids; i++) { 4091 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i); 4092 if (fid == NULL) { 4093 THROW(vmSymbols::java_lang_NullPointerException()); 4094 } 4095 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); 4096 4097 switch (tcodes->char_at(i)) { 4098 case 'Z': 4099 { 4100 jboolean val = o->bool_field(field_offset); 4101 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0); 4102 } 4103 break; 4104 4105 case 'B': 4106 dbuf->byte_at_put(off++, o->byte_field(field_offset)); 4107 break; 4108 4109 case 'C': 4110 { 4111 jchar val = o->char_field(field_offset); 4112 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 4113 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 4114 } 4115 break; 4116 4117 case 'S': 4118 { 4119 jshort val = o->short_field(field_offset); 4120 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 4121 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 4122 } 4123 break; 4124 4125 case 'I': 4126 { 4127 jint val = o->int_field(field_offset); 4128 dbuf->byte_at_put(off++, (val >> 24) & 0xFF); 4129 dbuf->byte_at_put(off++, (val >> 16) & 0xFF); 4130 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 4131 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 4132 } 4133 break; 4134 4135 case 'F': 4136 { 4137 jfloat fval = o->float_field(field_offset); 4138 jint ival = (*float_to_int_bits_fn)(env, NULL, fval); 4139 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF); 4140 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF); 4141 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF); 4142 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF); 4143 } 4144 break; 4145 4146 case 'J': 4147 { 4148 jlong val = o->long_field(field_offset); 4149 dbuf->byte_at_put(off++, (val >> 56) & 0xFF); 4150 dbuf->byte_at_put(off++, (val >> 48) & 0xFF); 4151 dbuf->byte_at_put(off++, (val >> 40) & 0xFF); 4152 dbuf->byte_at_put(off++, (val >> 32) & 0xFF); 4153 dbuf->byte_at_put(off++, (val >> 24) & 0xFF); 4154 dbuf->byte_at_put(off++, (val >> 16) & 0xFF); 4155 dbuf->byte_at_put(off++, (val >> 8) & 0xFF); 4156 dbuf->byte_at_put(off++, (val >> 0) & 0xFF); 4157 } 4158 break; 4159 4160 case 'D': 4161 { 4162 jdouble dval = o->double_field(field_offset); 4163 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval); 4164 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF); 4165 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF); 4166 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF); 4167 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF); 4168 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF); 4169 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF); 4170 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF); 4171 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF); 4172 } 4173 break; 4174 4175 default: 4176 // Illegal typecode 4177 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode"); 4178 } 4179 } 4180JVM_END 4181 4182 4183// Shared JNI/JVM entry points ////////////////////////////////////////////////////////////// 4184 4185jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) { 4186 // Security Note: 4187 // The Java level wrapper will perform the necessary security check allowing 4188 // us to pass the NULL as the initiating class loader. 4189 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL); 4190 4191 KlassHandle klass_handle(THREAD, klass); 4192 // Check if we should initialize the class 4193 if (init && klass_handle->oop_is_instance()) { 4194 klass_handle->initialize(CHECK_NULL); 4195 } 4196 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror()); 4197} 4198 4199 4200// Internal SQE debugging support /////////////////////////////////////////////////////////// 4201 4202#ifndef PRODUCT 4203 4204extern "C" { 4205 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get); 4206 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get); 4207 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj); 4208} 4209 4210JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get)) 4211 JVMWrapper("JVM_AccessBoolVMFlag"); 4212 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL); 4213JVM_END 4214 4215JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get)) 4216 JVMWrapper("JVM_AccessVMIntFlag"); 4217 intx v; 4218 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL); 4219 *value = (jint)v; 4220 return result; 4221JVM_END 4222 4223 4224JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj)) 4225 JVMWrapper("JVM_VMBreakPoint"); 4226 oop the_obj = JNIHandles::resolve(obj); 4227 BREAKPOINT; 4228JVM_END 4229 4230 4231#endif 4232 4233 4234// Method /////////////////////////////////////////////////////////////////////////////////////////// 4235 4236JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0)) 4237 JVMWrapper("JVM_InvokeMethod"); 4238 Handle method_handle; 4239 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) { 4240 method_handle = Handle(THREAD, JNIHandles::resolve(method)); 4241 Handle receiver(THREAD, JNIHandles::resolve(obj)); 4242 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); 4243 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL); 4244 jobject res = JNIHandles::make_local(env, result); 4245 if (JvmtiExport::should_post_vm_object_alloc()) { 4246 oop ret_type = java_lang_reflect_Method::return_type(method_handle()); 4247 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!"); 4248 if (java_lang_Class::is_primitive(ret_type)) { 4249 // Only for primitive type vm allocates memory for java object. 4250 // See box() method. 4251 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); 4252 } 4253 } 4254 return res; 4255 } else { 4256 THROW_0(vmSymbols::java_lang_StackOverflowError()); 4257 } 4258JVM_END 4259 4260 4261JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0)) 4262 JVMWrapper("JVM_NewInstanceFromConstructor"); 4263 oop constructor_mirror = JNIHandles::resolve(c); 4264 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); 4265 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL); 4266 jobject res = JNIHandles::make_local(env, result); 4267 if (JvmtiExport::should_post_vm_object_alloc()) { 4268 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result); 4269 } 4270 return res; 4271JVM_END 4272 4273// Atomic /////////////////////////////////////////////////////////////////////////////////////////// 4274 4275JVM_LEAF(jboolean, JVM_SupportsCX8()) 4276 JVMWrapper("JVM_SupportsCX8"); 4277 return VM_Version::supports_cx8(); 4278JVM_END 4279 4280 4281JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal)) 4282 JVMWrapper("JVM_CX8Field"); 4283 jlong res; 4284 oop o = JNIHandles::resolve(obj); 4285 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid); 4286 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs); 4287 4288 assert(VM_Version::supports_cx8(), "cx8 not supported"); 4289 res = Atomic::cmpxchg(newVal, addr, oldVal); 4290 4291 return res == oldVal; 4292JVM_END 4293 4294// DTrace /////////////////////////////////////////////////////////////////// 4295 4296JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env)) 4297 JVMWrapper("JVM_DTraceGetVersion"); 4298 return (jint)JVM_TRACING_DTRACE_VERSION; 4299JVM_END 4300 4301JVM_ENTRY(jlong,JVM_DTraceActivate( 4302 JNIEnv* env, jint version, jstring module_name, jint providers_count, 4303 JVM_DTraceProvider* providers)) 4304 JVMWrapper("JVM_DTraceActivate"); 4305 return DTraceJSDT::activate( 4306 version, module_name, providers_count, providers, CHECK_0); 4307JVM_END 4308 4309JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method)) 4310 JVMWrapper("JVM_DTraceIsProbeEnabled"); 4311 return DTraceJSDT::is_probe_enabled(method); 4312JVM_END 4313 4314JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle)) 4315 JVMWrapper("JVM_DTraceDispose"); 4316 DTraceJSDT::dispose(handle); 4317JVM_END 4318 4319JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env)) 4320 JVMWrapper("JVM_DTraceIsSupported"); 4321 return DTraceJSDT::is_supported(); 4322JVM_END 4323 4324// Returns an array of all live Thread objects (VM internal JavaThreads, 4325// jvmti agent threads, and JNI attaching threads are skipped) 4326// See CR 6404306 regarding JNI attaching threads 4327JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy)) 4328 ResourceMark rm(THREAD); 4329 ThreadsListEnumerator tle(THREAD, false, false); 4330 JvmtiVMObjectAllocEventCollector oam; 4331 4332 int num_threads = tle.num_threads(); 4333 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL); 4334 objArrayHandle threads_ah(THREAD, r); 4335 4336 for (int i = 0; i < num_threads; i++) { 4337 Handle h = tle.get_threadObj(i); 4338 threads_ah->obj_at_put(i, h()); 4339 } 4340 4341 return (jobjectArray) JNIHandles::make_local(env, threads_ah()); 4342JVM_END 4343 4344 4345// Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods 4346// Return StackTraceElement[][], each element is the stack trace of a thread in 4347// the corresponding entry in the given threads array 4348JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads)) 4349 JVMWrapper("JVM_DumpThreads"); 4350 JvmtiVMObjectAllocEventCollector oam; 4351 4352 // Check if threads is null 4353 if (threads == NULL) { 4354 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 4355 } 4356 4357 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads)); 4358 objArrayHandle ah(THREAD, a); 4359 int num_threads = ah->length(); 4360 // check if threads is non-empty array 4361 if (num_threads == 0) { 4362 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); 4363 } 4364 4365 // check if threads is not an array of objects of Thread class 4366 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass(); 4367 if (k != SystemDictionary::Thread_klass()) { 4368 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0); 4369 } 4370 4371 ResourceMark rm(THREAD); 4372 4373 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); 4374 for (int i = 0; i < num_threads; i++) { 4375 oop thread_obj = ah->obj_at(i); 4376 instanceHandle h(THREAD, (instanceOop) thread_obj); 4377 thread_handle_array->append(h); 4378 } 4379 4380 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL); 4381 return (jobjectArray)JNIHandles::make_local(env, stacktraces()); 4382 4383JVM_END 4384 4385// JVM monitoring and management support 4386JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version)) 4387 return Management::get_jmm_interface(version); 4388JVM_END 4389 4390// com.sun.tools.attach.VirtualMachine agent properties support 4391// 4392// Initialize the agent properties with the properties maintained in the VM 4393JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties)) 4394 JVMWrapper("JVM_InitAgentProperties"); 4395 ResourceMark rm; 4396 4397 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); 4398 4399 PUTPROP(props, "sun.java.command", Arguments::java_command()); 4400 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags()); 4401 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args()); 4402 return properties; 4403JVM_END 4404 4405JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass)) 4406{ 4407 JVMWrapper("JVM_GetEnclosingMethodInfo"); 4408 JvmtiVMObjectAllocEventCollector oam; 4409 4410 if (ofClass == NULL) { 4411 return NULL; 4412 } 4413 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass)); 4414 // Special handling for primitive objects 4415 if (java_lang_Class::is_primitive(mirror())) { 4416 return NULL; 4417 } 4418 Klass* k = java_lang_Class::as_Klass(mirror()); 4419 if (!k->oop_is_instance()) { 4420 return NULL; 4421 } 4422 instanceKlassHandle ik_h(THREAD, k); 4423 int encl_method_class_idx = ik_h->enclosing_method_class_index(); 4424 if (encl_method_class_idx == 0) { 4425 return NULL; 4426 } 4427 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL); 4428 objArrayHandle dest(THREAD, dest_o); 4429 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL); 4430 dest->obj_at_put(0, enc_k->java_mirror()); 4431 int encl_method_method_idx = ik_h->enclosing_method_method_index(); 4432 if (encl_method_method_idx != 0) { 4433 Symbol* sym = ik_h->constants()->symbol_at( 4434 extract_low_short_from_int( 4435 ik_h->constants()->name_and_type_at(encl_method_method_idx))); 4436 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 4437 dest->obj_at_put(1, str()); 4438 sym = ik_h->constants()->symbol_at( 4439 extract_high_short_from_int( 4440 ik_h->constants()->name_and_type_at(encl_method_method_idx))); 4441 str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 4442 dest->obj_at_put(2, str()); 4443 } 4444 return (jobjectArray) JNIHandles::make_local(dest()); 4445} 4446JVM_END 4447 4448JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env, 4449 jint javaThreadState)) 4450{ 4451 // If new thread states are added in future JDK and VM versions, 4452 // this should check if the JDK version is compatible with thread 4453 // states supported by the VM. Return NULL if not compatible. 4454 // 4455 // This function must map the VM java_lang_Thread::ThreadStatus 4456 // to the Java thread state that the JDK supports. 4457 // 4458 4459 typeArrayHandle values_h; 4460 switch (javaThreadState) { 4461 case JAVA_THREAD_STATE_NEW : { 4462 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4463 values_h = typeArrayHandle(THREAD, r); 4464 values_h->int_at_put(0, java_lang_Thread::NEW); 4465 break; 4466 } 4467 case JAVA_THREAD_STATE_RUNNABLE : { 4468 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4469 values_h = typeArrayHandle(THREAD, r); 4470 values_h->int_at_put(0, java_lang_Thread::RUNNABLE); 4471 break; 4472 } 4473 case JAVA_THREAD_STATE_BLOCKED : { 4474 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4475 values_h = typeArrayHandle(THREAD, r); 4476 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER); 4477 break; 4478 } 4479 case JAVA_THREAD_STATE_WAITING : { 4480 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL); 4481 values_h = typeArrayHandle(THREAD, r); 4482 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT); 4483 values_h->int_at_put(1, java_lang_Thread::PARKED); 4484 break; 4485 } 4486 case JAVA_THREAD_STATE_TIMED_WAITING : { 4487 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL); 4488 values_h = typeArrayHandle(THREAD, r); 4489 values_h->int_at_put(0, java_lang_Thread::SLEEPING); 4490 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED); 4491 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED); 4492 break; 4493 } 4494 case JAVA_THREAD_STATE_TERMINATED : { 4495 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL); 4496 values_h = typeArrayHandle(THREAD, r); 4497 values_h->int_at_put(0, java_lang_Thread::TERMINATED); 4498 break; 4499 } 4500 default: 4501 // Unknown state - probably incompatible JDK version 4502 return NULL; 4503 } 4504 4505 return (jintArray) JNIHandles::make_local(env, values_h()); 4506} 4507JVM_END 4508 4509 4510JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env, 4511 jint javaThreadState, 4512 jintArray values)) 4513{ 4514 // If new thread states are added in future JDK and VM versions, 4515 // this should check if the JDK version is compatible with thread 4516 // states supported by the VM. Return NULL if not compatible. 4517 // 4518 // This function must map the VM java_lang_Thread::ThreadStatus 4519 // to the Java thread state that the JDK supports. 4520 // 4521 4522 ResourceMark rm; 4523 4524 // Check if threads is null 4525 if (values == NULL) { 4526 THROW_(vmSymbols::java_lang_NullPointerException(), 0); 4527 } 4528 4529 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values)); 4530 typeArrayHandle values_h(THREAD, v); 4531 4532 objArrayHandle names_h; 4533 switch (javaThreadState) { 4534 case JAVA_THREAD_STATE_NEW : { 4535 assert(values_h->length() == 1 && 4536 values_h->int_at(0) == java_lang_Thread::NEW, 4537 "Invalid threadStatus value"); 4538 4539 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4540 1, /* only 1 substate */ 4541 CHECK_NULL); 4542 names_h = objArrayHandle(THREAD, r); 4543 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL); 4544 names_h->obj_at_put(0, name()); 4545 break; 4546 } 4547 case JAVA_THREAD_STATE_RUNNABLE : { 4548 assert(values_h->length() == 1 && 4549 values_h->int_at(0) == java_lang_Thread::RUNNABLE, 4550 "Invalid threadStatus value"); 4551 4552 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4553 1, /* only 1 substate */ 4554 CHECK_NULL); 4555 names_h = objArrayHandle(THREAD, r); 4556 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL); 4557 names_h->obj_at_put(0, name()); 4558 break; 4559 } 4560 case JAVA_THREAD_STATE_BLOCKED : { 4561 assert(values_h->length() == 1 && 4562 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER, 4563 "Invalid threadStatus value"); 4564 4565 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4566 1, /* only 1 substate */ 4567 CHECK_NULL); 4568 names_h = objArrayHandle(THREAD, r); 4569 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL); 4570 names_h->obj_at_put(0, name()); 4571 break; 4572 } 4573 case JAVA_THREAD_STATE_WAITING : { 4574 assert(values_h->length() == 2 && 4575 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT && 4576 values_h->int_at(1) == java_lang_Thread::PARKED, 4577 "Invalid threadStatus value"); 4578 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4579 2, /* number of substates */ 4580 CHECK_NULL); 4581 names_h = objArrayHandle(THREAD, r); 4582 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT", 4583 CHECK_NULL); 4584 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED", 4585 CHECK_NULL); 4586 names_h->obj_at_put(0, name0()); 4587 names_h->obj_at_put(1, name1()); 4588 break; 4589 } 4590 case JAVA_THREAD_STATE_TIMED_WAITING : { 4591 assert(values_h->length() == 3 && 4592 values_h->int_at(0) == java_lang_Thread::SLEEPING && 4593 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED && 4594 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED, 4595 "Invalid threadStatus value"); 4596 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4597 3, /* number of substates */ 4598 CHECK_NULL); 4599 names_h = objArrayHandle(THREAD, r); 4600 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING", 4601 CHECK_NULL); 4602 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT", 4603 CHECK_NULL); 4604 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED", 4605 CHECK_NULL); 4606 names_h->obj_at_put(0, name0()); 4607 names_h->obj_at_put(1, name1()); 4608 names_h->obj_at_put(2, name2()); 4609 break; 4610 } 4611 case JAVA_THREAD_STATE_TERMINATED : { 4612 assert(values_h->length() == 1 && 4613 values_h->int_at(0) == java_lang_Thread::TERMINATED, 4614 "Invalid threadStatus value"); 4615 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 4616 1, /* only 1 substate */ 4617 CHECK_NULL); 4618 names_h = objArrayHandle(THREAD, r); 4619 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL); 4620 names_h->obj_at_put(0, name()); 4621 break; 4622 } 4623 default: 4624 // Unknown state - probably incompatible JDK version 4625 return NULL; 4626 } 4627 return (jobjectArray) JNIHandles::make_local(env, names_h()); 4628} 4629JVM_END 4630 4631JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size)) 4632{ 4633 memset(info, 0, sizeof(info_size)); 4634 4635 info->jvm_version = Abstract_VM_Version::jvm_version(); 4636 info->update_version = 0; /* 0 in HotSpot Express VM */ 4637 info->special_update_version = 0; /* 0 in HotSpot Express VM */ 4638 4639 // when we add a new capability in the jvm_version_info struct, we should also 4640 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat 4641 // counter defined in runtimeService.cpp. 4642 info->is_attachable = AttachListener::is_attach_supported(); 4643} 4644JVM_END 4645