1 /* 2 * Copyright (c) 1997, 2024, 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 "cds/aotConstantPoolResolver.hpp" 27 #include "cds/cdsConfig.hpp" 28 #include "cds/classListParser.hpp" 29 #include "cds/classListWriter.hpp" 30 #include "cds/dynamicArchive.hpp" 31 #include "cds/heapShared.hpp" 32 #include "cds/lambdaFormInvokers.hpp" 33 #include "classfile/classFileStream.hpp" 34 #include "classfile/classLoader.inline.hpp" 35 #include "classfile/classLoaderData.hpp" 36 #include "classfile/classLoaderData.inline.hpp" 37 #include "classfile/classLoadInfo.hpp" 38 #include "classfile/javaAssertions.hpp" 39 #include "classfile/javaClasses.inline.hpp" 40 #include "classfile/moduleEntry.hpp" 41 #include "classfile/modules.hpp" 42 #include "classfile/packageEntry.hpp" 43 #include "classfile/stringTable.hpp" 44 #include "classfile/symbolTable.hpp" 45 #include "classfile/systemDictionary.hpp" 46 #include "classfile/vmClasses.hpp" 47 #include "classfile/vmSymbols.hpp" 48 #include "gc/shared/collectedHeap.inline.hpp" 49 #include "interpreter/bytecode.hpp" 50 #include "interpreter/bytecodeUtils.hpp" 51 #include "jfr/jfrEvents.hpp" 52 #include "jvm.h" 53 #include "logging/log.hpp" 54 #include "memory/oopFactory.hpp" 55 #include "memory/referenceType.hpp" 56 #include "memory/resourceArea.hpp" 57 #include "memory/universe.hpp" 58 #include "oops/access.inline.hpp" 59 #include "oops/constantPool.hpp" 60 #include "oops/fieldStreams.inline.hpp" 61 #include "oops/instanceKlass.hpp" 62 #include "oops/klass.inline.hpp" 63 #include "oops/method.hpp" 64 #include "oops/recordComponent.hpp" 65 #include "oops/objArrayKlass.hpp" 66 #include "oops/objArrayOop.inline.hpp" 67 #include "oops/oop.inline.hpp" 68 #include "prims/foreignGlobals.hpp" 69 #include "prims/jvm_misc.hpp" 70 #include "prims/jvmtiExport.hpp" 71 #include "prims/jvmtiThreadState.inline.hpp" 72 #include "prims/stackwalk.hpp" 73 #include "runtime/arguments.hpp" 74 #include "runtime/atomic.hpp" 75 #include "runtime/continuation.hpp" 76 #include "runtime/globals_extension.hpp" 77 #include "runtime/handles.inline.hpp" 78 #include "runtime/init.hpp" 79 #include "runtime/interfaceSupport.inline.hpp" 80 #include "runtime/deoptimization.hpp" 81 #include "runtime/handshake.hpp" 82 #include "runtime/java.hpp" 83 #include "runtime/javaCalls.hpp" 84 #include "runtime/javaThread.hpp" 85 #include "runtime/jfieldIDWorkaround.hpp" 86 #include "runtime/jniHandles.inline.hpp" 87 #include "runtime/os.inline.hpp" 88 #include "runtime/osThread.hpp" 89 #include "runtime/perfData.inline.hpp" 90 #include "runtime/reflection.hpp" 91 #include "runtime/synchronizer.hpp" 92 #include "runtime/threadIdentifier.hpp" 93 #include "runtime/threadSMR.hpp" 94 #include "runtime/vframe.inline.hpp" 95 #include "runtime/vmOperations.hpp" 96 #include "runtime/vm_version.hpp" 97 #include "services/attachListener.hpp" 98 #include "services/management.hpp" 99 #include "services/threadService.hpp" 100 #include "utilities/checkedCast.hpp" 101 #include "utilities/copy.hpp" 102 #include "utilities/defaultStream.hpp" 103 #include "utilities/dtrace.hpp" 104 #include "utilities/events.hpp" 105 #include "utilities/macros.hpp" 106 #include "utilities/utf8.hpp" 107 #include "utilities/zipLibrary.hpp" 108 #if INCLUDE_CDS 109 #include "classfile/systemDictionaryShared.hpp" 110 #endif 111 #if INCLUDE_JFR 112 #include "jfr/jfr.hpp" 113 #endif 114 #if INCLUDE_MANAGEMENT 115 #include "services/finalizerService.hpp" 116 #endif 117 #ifdef LINUX 118 #include "osContainer_linux.hpp" 119 #endif 120 121 #include <errno.h> 122 123 /* 124 NOTE about use of any ctor or function call that can trigger a safepoint/GC: 125 such ctors and calls MUST NOT come between an oop declaration/init and its 126 usage because if objects are move this may cause various memory stomps, bus 127 errors and segfaults. Here is a cookbook for causing so called "naked oop 128 failures": 129 130 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> { 131 // Object address to be held directly in mirror & not visible to GC 132 oop mirror = JNIHandles::resolve_non_null(ofClass); 133 134 // If this ctor can hit a safepoint, moving objects around, then 135 ComplexConstructor foo; 136 137 // Boom! mirror may point to JUNK instead of the intended object 138 (some dereference of mirror) 139 140 // Here's another call that may block for GC, making mirror stale 141 MutexLocker ml(some_lock); 142 143 // And here's an initializer that can result in a stale oop 144 // all in one step. 145 oop o = call_that_can_throw_exception(TRAPS); 146 147 148 The solution is to keep the oop declaration BELOW the ctor or function 149 call that might cause a GC, do another resolve to reassign the oop, or 150 consider use of a Handle instead of an oop so there is immunity from object 151 motion. But note that the "QUICK" entries below do not have a handlemark 152 and thus can only support use of handles passed in. 153 */ 154 155 static void trace_class_resolution_impl(Klass* to_class, TRAPS) { 156 ResourceMark rm; 157 int line_number = -1; 158 const char * source_file = nullptr; 159 const char * trace = "explicit"; 160 InstanceKlass* caller = nullptr; 161 JavaThread* jthread = THREAD; 162 if (jthread->has_last_Java_frame()) { 163 vframeStream vfst(jthread); 164 165 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames 166 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController"); 167 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK); 168 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction"); 169 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK); 170 171 Method* last_caller = nullptr; 172 173 while (!vfst.at_end()) { 174 Method* m = vfst.method(); 175 if (!vfst.method()->method_holder()->is_subclass_of(vmClasses::ClassLoader_klass())&& 176 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) && 177 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) { 178 break; 179 } 180 last_caller = m; 181 vfst.next(); 182 } 183 // if this is called from Class.forName0 and that is called from Class.forName, 184 // then print the caller of Class.forName. If this is Class.loadClass, then print 185 // that caller, otherwise keep quiet since this should be picked up elsewhere. 186 bool found_it = false; 187 if (!vfst.at_end() && 188 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() && 189 vfst.method()->name() == vmSymbols::forName0_name()) { 190 vfst.next(); 191 if (!vfst.at_end() && 192 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() && 193 vfst.method()->name() == vmSymbols::forName_name()) { 194 vfst.next(); 195 found_it = true; 196 } 197 } else if (last_caller != nullptr && 198 last_caller->method_holder()->name() == 199 vmSymbols::java_lang_ClassLoader() && 200 last_caller->name() == vmSymbols::loadClass_name()) { 201 found_it = true; 202 } else if (!vfst.at_end()) { 203 if (vfst.method()->is_native()) { 204 // JNI call 205 found_it = true; 206 } 207 } 208 if (found_it && !vfst.at_end()) { 209 // found the caller 210 caller = vfst.method()->method_holder(); 211 line_number = vfst.method()->line_number_from_bci(vfst.bci()); 212 if (line_number == -1) { 213 // show method name if it's a native method 214 trace = vfst.method()->name_and_sig_as_C_string(); 215 } 216 Symbol* s = caller->source_file_name(); 217 if (s != nullptr) { 218 source_file = s->as_C_string(); 219 } 220 } 221 } 222 if (caller != nullptr) { 223 if (to_class != caller) { 224 const char * from = caller->external_name(); 225 const char * to = to_class->external_name(); 226 // print in a single call to reduce interleaving between threads 227 if (source_file != nullptr) { 228 log_debug(class, resolve)("%s %s %s:%d (%s)", from, to, source_file, line_number, trace); 229 } else { 230 log_debug(class, resolve)("%s %s (%s)", from, to, trace); 231 } 232 } 233 } 234 } 235 236 void trace_class_resolution(Klass* to_class) { 237 EXCEPTION_MARK; 238 trace_class_resolution_impl(to_class, THREAD); 239 if (HAS_PENDING_EXCEPTION) { 240 CLEAR_PENDING_EXCEPTION; 241 } 242 } 243 244 // java.lang.System ////////////////////////////////////////////////////////////////////// 245 246 247 JVM_LEAF_PROF(jlong, JVM_CurrentTimeMillis, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored)) 248 return os::javaTimeMillis(); 249 JVM_END 250 251 JVM_LEAF_PROF(jlong, JVM_NanoTime, JVM_NanoTime(JNIEnv *env, jclass ignored)) 252 return os::javaTimeNanos(); 253 JVM_END 254 255 // The function below is actually exposed by jdk.internal.misc.VM and not 256 // java.lang.System, but we choose to keep it here so that it stays next 257 // to JVM_CurrentTimeMillis and JVM_NanoTime 258 259 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); // 2^32 260 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32 261 262 JVM_LEAF_PROF(jlong, JVM_GetNanoTimeAdjustment, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs)) 263 jlong seconds; 264 jlong nanos; 265 266 os::javaTimeSystemUTC(seconds, nanos); 267 268 // We're going to verify that the result can fit in a long. 269 // For that we need the difference in seconds between 'seconds' 270 // and 'offset_secs' to be such that: 271 // |seconds - offset_secs| < (2^63/10^9) 272 // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3) 273 // which makes |seconds - offset_secs| < 2^33 274 // and we will prefer +/- 2^32 as the maximum acceptable diff 275 // as 2^32 has a more natural feel than 2^33... 276 // 277 // So if |seconds - offset_secs| >= 2^32 - we return a special 278 // sentinel value (-1) which the caller should take as an 279 // exception value indicating that the offset given to us is 280 // too far from range of the current time - leading to too big 281 // a nano adjustment. The caller is expected to recover by 282 // computing a more accurate offset and calling this method 283 // again. (For the record 2^32 secs is ~136 years, so that 284 // should rarely happen) 285 // 286 jlong diff = seconds - offset_secs; 287 if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) { 288 return -1; // sentinel value: the offset is too far off the target 289 } 290 291 // return the adjustment. If you compute a time by adding 292 // this number of nanoseconds along with the number of seconds 293 // in the offset you should get the current UTC time. 294 return (diff * (jlong)1000000000) + nanos; 295 JVM_END 296 297 JVM_ENTRY_PROF(void, JVM_ArrayCopy, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos, 298 jobject dst, jint dst_pos, jint length)) 299 // Check if we have null pointers 300 if (src == nullptr || dst == nullptr) { 301 THROW(vmSymbols::java_lang_NullPointerException()); 302 } 303 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src)); 304 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst)); 305 assert(oopDesc::is_oop(s), "JVM_ArrayCopy: src not an oop"); 306 assert(oopDesc::is_oop(d), "JVM_ArrayCopy: dst not an oop"); 307 // Do copy 308 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread); 309 JVM_END 310 311 312 static void set_property(Handle props, const char* key, const char* value, TRAPS) { 313 JavaValue r(T_OBJECT); 314 // public synchronized Object put(Object key, Object value); 315 HandleMark hm(THREAD); 316 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK); 317 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != nullptr ? value : ""), CHECK); 318 JavaCalls::call_virtual(&r, 319 props, 320 vmClasses::Properties_klass(), 321 vmSymbols::put_name(), 322 vmSymbols::object_object_object_signature(), 323 key_str, 324 value_str, 325 THREAD); 326 } 327 328 329 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties)); 330 331 /* 332 * Return all of the system properties in a Java String array with alternating 333 * names and values from the jvm SystemProperty. 334 * Which includes some internal and all commandline -D defined properties. 335 */ 336 JVM_ENTRY_PROF(jobjectArray, JVM_GetProperties, JVM_GetProperties(JNIEnv *env)) 337 ResourceMark rm(THREAD); 338 HandleMark hm(THREAD); 339 int ndx = 0; 340 int fixedCount = 2; 341 342 SystemProperty* p = Arguments::system_properties(); 343 int count = Arguments::PropertyList_count(p); 344 345 // Allocate result String array 346 InstanceKlass* ik = vmClasses::String_klass(); 347 objArrayOop r = oopFactory::new_objArray(ik, (count + fixedCount) * 2, CHECK_NULL); 348 objArrayHandle result_h(THREAD, r); 349 350 while (p != nullptr) { 351 const char * key = p->key(); 352 if (strcmp(key, "sun.nio.MaxDirectMemorySize") != 0) { 353 const char * value = p->value(); 354 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK_NULL); 355 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != nullptr ? value : ""), CHECK_NULL); 356 result_h->obj_at_put(ndx * 2, key_str()); 357 result_h->obj_at_put(ndx * 2 + 1, value_str()); 358 ndx++; 359 } 360 p = p->next(); 361 } 362 363 // Convert the -XX:MaxDirectMemorySize= command line flag 364 // to the sun.nio.MaxDirectMemorySize property. 365 // Do this after setting user properties to prevent people 366 // from setting the value with a -D option, as requested. 367 // Leave empty if not supplied 368 if (!FLAG_IS_DEFAULT(MaxDirectMemorySize)) { 369 char as_chars[256]; 370 jio_snprintf(as_chars, sizeof(as_chars), JULONG_FORMAT, MaxDirectMemorySize); 371 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.nio.MaxDirectMemorySize", CHECK_NULL); 372 Handle value_str = java_lang_String::create_from_platform_dependent_str(as_chars, CHECK_NULL); 373 result_h->obj_at_put(ndx * 2, key_str()); 374 result_h->obj_at_put(ndx * 2 + 1, value_str()); 375 ndx++; 376 } 377 378 // JVM monitoring and management support 379 // Add the sun.management.compiler property for the compiler's name 380 { 381 #undef CSIZE 382 #if defined(_LP64) || defined(_WIN64) 383 #define CSIZE "64-Bit " 384 #else 385 #define CSIZE 386 #endif // 64bit 387 388 #if COMPILER1_AND_COMPILER2 389 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers"; 390 #else 391 #if defined(COMPILER1) 392 const char* compiler_name = "HotSpot " CSIZE "Client Compiler"; 393 #elif defined(COMPILER2) 394 const char* compiler_name = "HotSpot " CSIZE "Server Compiler"; 395 #elif INCLUDE_JVMCI 396 #error "INCLUDE_JVMCI should imply COMPILER1_OR_COMPILER2" 397 #else 398 const char* compiler_name = ""; 399 #endif // compilers 400 #endif // COMPILER1_AND_COMPILER2 401 402 if (*compiler_name != '\0' && 403 (Arguments::mode() != Arguments::_int)) { 404 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.management.compiler", CHECK_NULL); 405 Handle value_str = java_lang_String::create_from_platform_dependent_str(compiler_name, CHECK_NULL); 406 result_h->obj_at_put(ndx * 2, key_str()); 407 result_h->obj_at_put(ndx * 2 + 1, value_str()); 408 ndx++; 409 } 410 } 411 412 return (jobjectArray) JNIHandles::make_local(THREAD, result_h()); 413 JVM_END 414 415 416 /* 417 * Return the temporary directory that the VM uses for the attach 418 * and perf data files. 419 * 420 * It is important that this directory is well-known and the 421 * same for all VM instances. It cannot be affected by configuration 422 * variables such as java.io.tmpdir. 423 */ 424 JVM_ENTRY_PROF(jstring, JVM_GetTemporaryDirectory, JVM_GetTemporaryDirectory(JNIEnv *env)) 425 HandleMark hm(THREAD); 426 const char* temp_dir = os::get_temp_directory(); 427 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL); 428 return (jstring) JNIHandles::make_local(THREAD, h()); 429 JVM_END 430 431 432 // java.lang.Runtime ///////////////////////////////////////////////////////////////////////// 433 434 extern volatile jint vm_created; 435 436 JVM_ENTRY_NO_ENV_PROF(void, JVM_BeforeHalt, JVM_BeforeHalt()) 437 EventShutdown event; 438 if (event.should_commit()) { 439 event.set_reason("Shutdown requested from Java"); 440 event.commit(); 441 } 442 JVM_END 443 444 445 JVM_ENTRY_NO_ENV_PROF(void, JVM_Halt, JVM_Halt(jint code)) 446 before_exit(thread, true); 447 vm_exit(code); 448 JVM_END 449 450 451 JVM_ENTRY_NO_ENV_PROF(void, JVM_GC, JVM_GC(void)) 452 if (!DisableExplicitGC) { 453 EventSystemGC event; 454 event.set_invokedConcurrent(ExplicitGCInvokesConcurrent); 455 Universe::heap()->collect(GCCause::_java_lang_system_gc); 456 event.commit(); 457 } 458 JVM_END 459 460 461 JVM_LEAF_PROF(jlong, JVM_MaxObjectInspectionAge, JVM_MaxObjectInspectionAge(void)) 462 return Universe::heap()->millis_since_last_whole_heap_examined(); 463 JVM_END 464 465 466 static inline jlong convert_size_t_to_jlong(size_t val) { 467 // In the 64-bit vm, a size_t can overflow a jlong (which is signed). 468 NOT_LP64 (return (jlong)val;) 469 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);) 470 } 471 472 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_TotalMemory, JVM_TotalMemory(void)) 473 size_t n = Universe::heap()->capacity(); 474 return convert_size_t_to_jlong(n); 475 JVM_END 476 477 478 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_FreeMemory, JVM_FreeMemory(void)) 479 size_t n = Universe::heap()->unused(); 480 return convert_size_t_to_jlong(n); 481 JVM_END 482 483 484 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_MaxMemory, JVM_MaxMemory(void)) 485 size_t n = Universe::heap()->max_capacity(); 486 return convert_size_t_to_jlong(n); 487 JVM_END 488 489 490 JVM_ENTRY_NO_ENV_PROF(jint, JVM_ActiveProcessorCount, JVM_ActiveProcessorCount(void)) 491 return os::active_processor_count(); 492 JVM_END 493 494 JVM_LEAF_PROF(jboolean, JVM_IsUseContainerSupport, JVM_IsUseContainerSupport(void)) 495 #ifdef LINUX 496 if (UseContainerSupport) { 497 return JNI_TRUE; 498 } 499 #endif 500 return JNI_FALSE; 501 JVM_END 502 503 JVM_LEAF(jboolean, JVM_IsContainerized(void)) 504 #ifdef LINUX 505 if (OSContainer::is_containerized()) { 506 return JNI_TRUE; 507 } 508 #endif 509 return JNI_FALSE; 510 JVM_END 511 512 // java.lang.Throwable ////////////////////////////////////////////////////// 513 514 JVM_ENTRY_PROF(void, JVM_FillInStackTrace, JVM_FillInStackTrace(JNIEnv *env, jobject receiver)) 515 Handle exception(thread, JNIHandles::resolve_non_null(receiver)); 516 java_lang_Throwable::fill_in_stack_trace(exception); 517 JVM_END 518 519 // java.lang.NullPointerException /////////////////////////////////////////// 520 521 JVM_ENTRY_PROF(jstring, JVM_GetExtendedNPEMessage, JVM_GetExtendedNPEMessage(JNIEnv *env, jthrowable throwable)) 522 if (!ShowCodeDetailsInExceptionMessages) return nullptr; 523 524 oop exc = JNIHandles::resolve_non_null(throwable); 525 526 Method* method; 527 int bci; 528 if (!java_lang_Throwable::get_top_method_and_bci(exc, &method, &bci)) { 529 return nullptr; 530 } 531 if (method->is_native()) { 532 return nullptr; 533 } 534 535 stringStream ss; 536 bool ok = BytecodeUtils::get_NPE_message_at(&ss, method, bci); 537 if (ok) { 538 oop result = java_lang_String::create_oop_from_str(ss.base(), CHECK_NULL); 539 return (jstring) JNIHandles::make_local(THREAD, result); 540 } else { 541 return nullptr; 542 } 543 JVM_END 544 545 // java.lang.StackTraceElement ////////////////////////////////////////////// 546 547 548 JVM_ENTRY_PROF(void, JVM_InitStackTraceElementArray, JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject backtrace, jint depth)) 549 Handle backtraceh(THREAD, JNIHandles::resolve(backtrace)); 550 objArrayOop st = objArrayOop(JNIHandles::resolve(elements)); 551 objArrayHandle stack_trace(THREAD, st); 552 // Fill in the allocated stack trace 553 java_lang_Throwable::get_stack_trace_elements(depth, backtraceh, stack_trace, CHECK); 554 JVM_END 555 556 557 JVM_ENTRY_PROF(void, JVM_InitStackTraceElement, JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo)) 558 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(stackFrameInfo)); 559 Handle stack_trace_element(THREAD, JNIHandles::resolve_non_null(element)); 560 java_lang_StackFrameInfo::to_stack_trace_element(stack_frame_info, stack_trace_element, CHECK); 561 JVM_END 562 563 564 // java.lang.StackWalker ////////////////////////////////////////////////////// 565 JVM_ENTRY_PROF(void, JVM_ExpandStackFrameInfo, JVM_ExpandStackFrameInfo(JNIEnv *env, jobject obj)) 566 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(obj)); 567 568 bool have_name = (java_lang_StackFrameInfo::name(stack_frame_info()) != nullptr); 569 bool have_type = (java_lang_StackFrameInfo::type(stack_frame_info()) != nullptr); 570 Method* method = java_lang_StackFrameInfo::get_method(stack_frame_info()); 571 if (!have_name) { 572 oop name = StringTable::intern(method->name(), CHECK); 573 java_lang_StackFrameInfo::set_name(stack_frame_info(), name); 574 } 575 if (!have_type) { 576 Handle type = java_lang_String::create_from_symbol(method->signature(), CHECK); 577 java_lang_StackFrameInfo::set_type(stack_frame_info(), type()); 578 } 579 JVM_END 580 581 JVM_ENTRY_PROF(jobject, JVM_CallStackWalk, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jint mode, 582 jint skip_frames, jobject contScope, jobject cont, 583 jint buffer_size, jint start_index, jobjectArray frames)) 584 if (!thread->has_last_Java_frame()) { 585 THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", nullptr); 586 } 587 588 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream)); 589 Handle contScope_h(THREAD, JNIHandles::resolve(contScope)); 590 Handle cont_h(THREAD, JNIHandles::resolve(cont)); 591 // frames array is a ClassFrameInfo[] array when only getting caller reference, 592 // and a StackFrameInfo[] array (or derivative) otherwise. It should never 593 // be null. 594 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames)); 595 objArrayHandle frames_array_h(THREAD, fa); 596 597 if (frames_array_h->length() < buffer_size) { 598 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", nullptr); 599 } 600 601 oop result = StackWalk::walk(stackStream_h, mode, skip_frames, contScope_h, cont_h, 602 buffer_size, start_index, frames_array_h, CHECK_NULL); 603 return JNIHandles::make_local(THREAD, result); 604 JVM_END 605 606 607 JVM_ENTRY_PROF(jint, JVM_MoreStackWalk, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jint mode, jlong anchor, 608 jint last_batch_count, jint buffer_size, jint start_index, 609 jobjectArray frames)) 610 // frames array is a ClassFrameInfo[] array when only getting caller reference, 611 // and a StackFrameInfo[] array (or derivative) otherwise. It should never 612 // be null. 613 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames)); 614 objArrayHandle frames_array_h(THREAD, fa); 615 616 if (frames_array_h->length() < buffer_size) { 617 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers"); 618 } 619 620 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream)); 621 return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, last_batch_count, buffer_size, 622 start_index, frames_array_h, THREAD); 623 JVM_END 624 625 JVM_ENTRY_PROF(void, JVM_SetStackWalkContinuation, JVM_SetStackWalkContinuation(JNIEnv *env, jobject stackStream, jlong anchor, jobjectArray frames, jobject cont)) 626 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames)); 627 objArrayHandle frames_array_h(THREAD, fa); 628 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream)); 629 Handle cont_h(THREAD, JNIHandles::resolve_non_null(cont)); 630 631 StackWalk::setContinuation(stackStream_h, anchor, frames_array_h, cont_h, THREAD); 632 JVM_END 633 634 // java.lang.Object /////////////////////////////////////////////// 635 636 637 JVM_ENTRY_PROF(jint, JVM_IHashCode, JVM_IHashCode(JNIEnv* env, jobject handle)) 638 // as implemented in the classic virtual machine; return 0 if object is null 639 return handle == nullptr ? 0 : 640 checked_cast<jint>(ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle))); 641 JVM_END 642 643 644 JVM_ENTRY_PROF(void, JVM_MonitorWait, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms)) 645 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 646 JavaThreadInObjectWaitState jtiows(thread, ms != 0); 647 if (JvmtiExport::should_post_monitor_wait()) { 648 JvmtiExport::post_monitor_wait(thread, obj(), ms); 649 650 // The current thread already owns the monitor and it has not yet 651 // been added to the wait queue so the current thread cannot be 652 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT 653 // event handler cannot accidentally consume an unpark() meant for 654 // the ParkEvent associated with this ObjectMonitor. 655 } 656 ObjectSynchronizer::wait(obj, ms, CHECK); 657 JVM_END 658 659 660 JVM_ENTRY_PROF(void, JVM_MonitorNotify, JVM_MonitorNotify(JNIEnv* env, jobject handle)) 661 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 662 ObjectSynchronizer::notify(obj, CHECK); 663 JVM_END 664 665 666 JVM_ENTRY_PROF(void, JVM_MonitorNotifyAll, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle)) 667 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 668 ObjectSynchronizer::notifyall(obj, CHECK); 669 JVM_END 670 671 672 JVM_ENTRY_PROF(jobject, JVM_Clone, JVM_Clone(JNIEnv* env, jobject handle)) 673 Handle obj(THREAD, JNIHandles::resolve_non_null(handle)); 674 Klass* klass = obj->klass(); 675 JvmtiVMObjectAllocEventCollector oam; 676 677 #ifdef ASSERT 678 // Just checking that the cloneable flag is set correct 679 if (obj->is_array()) { 680 guarantee(klass->is_cloneable(), "all arrays are cloneable"); 681 } else { 682 guarantee(obj->is_instance(), "should be instanceOop"); 683 bool cloneable = klass->is_subtype_of(vmClasses::Cloneable_klass()); 684 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag"); 685 } 686 #endif 687 688 // Check if class of obj supports the Cloneable interface. 689 // All arrays are considered to be cloneable (See JLS 20.1.5). 690 // All j.l.r.Reference classes are considered non-cloneable. 691 if (!klass->is_cloneable() || 692 (klass->is_instance_klass() && 693 InstanceKlass::cast(klass)->reference_type() != REF_NONE)) { 694 ResourceMark rm(THREAD); 695 THROW_MSG_NULL(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name()); 696 } 697 698 // Make shallow object copy 699 const size_t size = obj->size(); 700 oop new_obj_oop = nullptr; 701 if (obj->is_array()) { 702 const int length = ((arrayOop)obj())->length(); 703 new_obj_oop = Universe::heap()->array_allocate(klass, size, length, 704 /* do_zero */ true, CHECK_NULL); 705 } else { 706 new_obj_oop = Universe::heap()->obj_allocate(klass, size, CHECK_NULL); 707 } 708 709 HeapAccess<>::clone(obj(), new_obj_oop, size); 710 711 Handle new_obj(THREAD, new_obj_oop); 712 // Caution: this involves a java upcall, so the clone should be 713 // "gc-robust" by this stage. 714 if (klass->has_finalizer()) { 715 assert(obj->is_instance(), "should be instanceOop"); 716 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL); 717 new_obj = Handle(THREAD, new_obj_oop); 718 } 719 720 return JNIHandles::make_local(THREAD, new_obj()); 721 JVM_END 722 723 // java.lang.ref.Finalizer //////////////////////////////////////////////////// 724 725 JVM_ENTRY_PROF(void, JVM_ReportFinalizationComplete, JVM_ReportFinalizationComplete(JNIEnv * env, jobject finalizee)) 726 MANAGEMENT_ONLY(FinalizerService::on_complete(JNIHandles::resolve_non_null(finalizee), THREAD);) 727 JVM_END 728 729 JVM_LEAF_PROF(jboolean, JVM_IsFinalizationEnabled, JVM_IsFinalizationEnabled(JNIEnv * env)) 730 return InstanceKlass::is_finalization_enabled(); 731 JVM_END 732 733 // jdk.internal.vm.Continuation ///////////////////////////////////////////////////// 734 735 JVM_ENTRY_PROF(void, JVM_RegisterContinuationMethods, JVM_RegisterContinuationMethods(JNIEnv *env, jclass cls)) 736 CONT_RegisterNativeMethods(env, cls); 737 JVM_END 738 739 // java.io.File /////////////////////////////////////////////////////////////// 740 741 JVM_LEAF_PROF(char*, JVM_NativePath, JVM_NativePath(char* path)) 742 return os::native_path(path); 743 JVM_END 744 745 746 // Misc. class handling /////////////////////////////////////////////////////////// 747 748 749 JVM_ENTRY_PROF(jclass, JVM_GetCallerClass, JVM_GetCallerClass(JNIEnv* env)) 750 // Getting the class of the caller frame. 751 // 752 // The call stack at this point looks something like this: 753 // 754 // [0] [ @CallerSensitive public jdk.internal.reflect.Reflection.getCallerClass ] 755 // [1] [ @CallerSensitive API.method ] 756 // [.] [ (skipped intermediate frames) ] 757 // [n] [ caller ] 758 vframeStream vfst(thread); 759 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass 760 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) { 761 Method* m = vfst.method(); 762 assert(m != nullptr, "sanity"); 763 switch (n) { 764 case 0: 765 // This must only be called from Reflection.getCallerClass 766 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) { 767 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass"); 768 } 769 // fall-through 770 case 1: 771 // Frame 0 and 1 must be caller sensitive. 772 if (!m->caller_sensitive()) { 773 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n)); 774 } 775 break; 776 default: 777 if (!m->is_ignored_by_security_stack_walk()) { 778 // We have reached the desired frame; return the holder class. 779 return (jclass) JNIHandles::make_local(THREAD, m->method_holder()->java_mirror()); 780 } 781 break; 782 } 783 } 784 return nullptr; 785 JVM_END 786 787 788 JVM_ENTRY_PROF(jclass, JVM_FindPrimitiveClass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf)) 789 oop mirror = nullptr; 790 BasicType t = name2type(utf); 791 if (t != T_ILLEGAL && !is_reference_type(t)) { 792 mirror = Universe::java_mirror(t); 793 } 794 if (mirror == nullptr) { 795 THROW_MSG_NULL(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf); 796 } else { 797 return (jclass) JNIHandles::make_local(THREAD, mirror); 798 } 799 JVM_END 800 801 802 // Returns a class loaded by the bootstrap class loader; or null 803 // if not found. ClassNotFoundException is not thrown. 804 // FindClassFromBootLoader is exported to the launcher for windows. 805 JVM_ENTRY_PROF(jclass, JVM_FindClassFromBootLoader, JVM_FindClassFromBootLoader(JNIEnv* env, const char* name)) 806 // Java libraries should ensure that name is never null or illegal. 807 if (name == nullptr || (int)strlen(name) > Symbol::max_length()) { 808 // It's impossible to create this class; the name cannot fit 809 // into the constant pool. 810 return nullptr; 811 } 812 assert(UTF8::is_legal_utf8((const unsigned char*)name, strlen(name), false), "illegal UTF name"); 813 814 TempNewSymbol h_name = SymbolTable::new_symbol(name); 815 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL); 816 if (k == nullptr) { 817 return nullptr; 818 } 819 820 if (log_is_enabled(Debug, class, resolve)) { 821 trace_class_resolution(k); 822 } 823 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror()); 824 JVM_END 825 826 // Find a class with this name in this loader, using the caller's protection domain. 827 JVM_ENTRY_PROF(jclass, JVM_FindClassFromCaller, JVM_FindClassFromCaller(JNIEnv* env, const char* name, 828 jboolean init, jobject loader, 829 jclass caller)) 830 TempNewSymbol h_name = 831 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(), 832 CHECK_NULL); 833 834 oop loader_oop = JNIHandles::resolve(loader); 835 oop from_class = JNIHandles::resolve(caller); 836 oop protection_domain = nullptr; 837 // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get 838 // NPE. Put it in another way, the bootstrap class loader has all permission and 839 // thus no checkPackageAccess equivalence in the VM class loader. 840 // The caller is also passed as null by the java code if there is no security 841 // manager to avoid the performance cost of getting the calling class. 842 if (from_class != nullptr && loader_oop != nullptr) { 843 protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain(); 844 } 845 846 Handle h_loader(THREAD, loader_oop); 847 Handle h_prot(THREAD, protection_domain); 848 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, 849 h_prot, false, THREAD); 850 851 if (log_is_enabled(Debug, class, resolve) && result != nullptr) { 852 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))); 853 } 854 return result; 855 JVM_END 856 857 // Currently only called from the old verifier. 858 JVM_ENTRY_PROF(jclass, JVM_FindClassFromClass, JVM_FindClassFromClass(JNIEnv *env, const char *name, 859 jboolean init, jclass from)) 860 TempNewSymbol h_name = 861 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(), 862 CHECK_NULL); 863 oop from_class_oop = JNIHandles::resolve(from); 864 Klass* from_class = (from_class_oop == nullptr) 865 ? (Klass*)nullptr 866 : java_lang_Class::as_Klass(from_class_oop); 867 oop class_loader = nullptr; 868 oop protection_domain = nullptr; 869 if (from_class != nullptr) { 870 class_loader = from_class->class_loader(); 871 protection_domain = from_class->protection_domain(); 872 } 873 Handle h_loader(THREAD, class_loader); 874 Handle h_prot (THREAD, protection_domain); 875 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, 876 h_prot, true, thread); 877 878 if (log_is_enabled(Debug, class, resolve) && result != nullptr) { 879 // this function is generally only used for class loading during verification. 880 ResourceMark rm; 881 oop from_mirror = JNIHandles::resolve_non_null(from); 882 Klass* from_class = java_lang_Class::as_Klass(from_mirror); 883 const char * from_name = from_class->external_name(); 884 885 oop mirror = JNIHandles::resolve_non_null(result); 886 Klass* to_class = java_lang_Class::as_Klass(mirror); 887 const char * to = to_class->external_name(); 888 log_debug(class, resolve)("%s %s (verification)", from_name, to); 889 } 890 891 return result; 892 JVM_END 893 894 // common code for JVM_DefineClass() and JVM_DefineClassWithSource() 895 static jclass jvm_define_class_common(const char *name, 896 jobject loader, const jbyte *buf, 897 jsize len, jobject pd, const char *source, 898 TRAPS) { 899 if (source == nullptr) source = "__JVM_DefineClass__"; 900 901 JavaThread* jt = THREAD; 902 903 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(), 904 ClassLoader::perf_define_appclass_selftime(), 905 ClassLoader::perf_define_appclasses(), 906 jt->get_thread_stat()->perf_recursion_counts_addr(), 907 jt->get_thread_stat()->perf_timers_addr(), 908 PerfClassTraceTime::DEFINE_CLASS); 909 910 if (UsePerfData) { 911 ClassLoader::perf_app_classfile_bytes_read()->inc(len); 912 } 913 914 // Class resolution will get the class name from the .class stream if the name is null. 915 TempNewSymbol class_name = name == nullptr ? nullptr : 916 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(), 917 CHECK_NULL); 918 919 ResourceMark rm(THREAD); 920 ClassFileStream st((u1*)buf, len, source, ClassFileStream::verify); 921 Handle class_loader (THREAD, JNIHandles::resolve(loader)); 922 Handle protection_domain (THREAD, JNIHandles::resolve(pd)); 923 ClassLoadInfo cl_info(protection_domain); 924 Klass* k = SystemDictionary::resolve_from_stream(&st, class_name, 925 class_loader, 926 cl_info, 927 CHECK_NULL); 928 929 if (log_is_enabled(Debug, class, resolve)) { 930 trace_class_resolution(k); 931 } 932 933 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror()); 934 } 935 936 enum { 937 NESTMATE = java_lang_invoke_MemberName::MN_NESTMATE_CLASS, 938 HIDDEN_CLASS = java_lang_invoke_MemberName::MN_HIDDEN_CLASS, 939 STRONG_LOADER_LINK = java_lang_invoke_MemberName::MN_STRONG_LOADER_LINK, 940 ACCESS_VM_ANNOTATIONS = java_lang_invoke_MemberName::MN_ACCESS_VM_ANNOTATIONS 941 }; 942 943 /* 944 * Define a class with the specified flags that indicates if it's a nestmate, 945 * hidden, or strongly referenced from class loader. 946 */ 947 static jclass jvm_lookup_define_class(jclass lookup, const char *name, 948 const jbyte *buf, jsize len, jobject pd, 949 jboolean init, int flags, jobject classData, TRAPS) { 950 ResourceMark rm(THREAD); 951 952 Klass* lookup_k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(lookup)); 953 // Lookup class must be a non-null instance 954 if (lookup_k == nullptr) { 955 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class is null"); 956 } 957 assert(lookup_k->is_instance_klass(), "Lookup class must be an instance klass"); 958 959 Handle class_loader (THREAD, lookup_k->class_loader()); 960 961 bool is_nestmate = (flags & NESTMATE) == NESTMATE; 962 bool is_hidden = (flags & HIDDEN_CLASS) == HIDDEN_CLASS; 963 bool is_strong = (flags & STRONG_LOADER_LINK) == STRONG_LOADER_LINK; 964 bool vm_annotations = (flags & ACCESS_VM_ANNOTATIONS) == ACCESS_VM_ANNOTATIONS; 965 966 InstanceKlass* host_class = nullptr; 967 if (is_nestmate) { 968 host_class = InstanceKlass::cast(lookup_k)->nest_host(CHECK_NULL); 969 } 970 971 log_info(class, nestmates)("LookupDefineClass: %s - %s%s, %s, %s, %s", 972 name, 973 is_nestmate ? "with dynamic nest-host " : "non-nestmate", 974 is_nestmate ? host_class->external_name() : "", 975 is_hidden ? "hidden" : "not hidden", 976 is_strong ? "strong" : "weak", 977 vm_annotations ? "with vm annotations" : "without vm annotation"); 978 979 if (!is_hidden) { 980 // classData is only applicable for hidden classes 981 if (classData != nullptr) { 982 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "classData is only applicable for hidden classes"); 983 } 984 if (is_nestmate) { 985 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "dynamic nestmate is only applicable for hidden classes"); 986 } 987 if (!is_strong) { 988 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "an ordinary class must be strongly referenced by its defining loader"); 989 } 990 if (vm_annotations) { 991 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "vm annotations only allowed for hidden classes"); 992 } 993 if (flags != STRONG_LOADER_LINK) { 994 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), 995 err_msg("invalid flag 0x%x", flags)); 996 } 997 } 998 999 // Class resolution will get the class name from the .class stream if the name is null. 1000 TempNewSymbol class_name = name == nullptr ? nullptr : 1001 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(), 1002 CHECK_NULL); 1003 1004 Handle protection_domain (THREAD, JNIHandles::resolve(pd)); 1005 const char* source = is_nestmate ? host_class->external_name() : "__JVM_LookupDefineClass__"; 1006 ClassFileStream st((u1*)buf, len, source, ClassFileStream::verify); 1007 1008 InstanceKlass* ik = nullptr; 1009 if (!is_hidden) { 1010 ClassLoadInfo cl_info(protection_domain); 1011 ik = SystemDictionary::resolve_from_stream(&st, class_name, 1012 class_loader, 1013 cl_info, 1014 CHECK_NULL); 1015 1016 if (log_is_enabled(Debug, class, resolve)) { 1017 trace_class_resolution(ik); 1018 } 1019 } else { // hidden 1020 Handle classData_h(THREAD, JNIHandles::resolve(classData)); 1021 ClassLoadInfo cl_info(protection_domain, 1022 host_class, 1023 classData_h, 1024 is_hidden, 1025 is_strong, 1026 vm_annotations); 1027 ik = SystemDictionary::resolve_from_stream(&st, class_name, 1028 class_loader, 1029 cl_info, 1030 CHECK_NULL); 1031 1032 // The hidden class loader data has been artificially been kept alive to 1033 // this point. The mirror and any instances of this class have to keep 1034 // it alive afterwards. 1035 ik->class_loader_data()->dec_keep_alive_ref_count(); 1036 1037 if (is_nestmate && log_is_enabled(Debug, class, nestmates)) { 1038 ModuleEntry* module = ik->module(); 1039 const char * module_name = module->is_named() ? module->name()->as_C_string() : UNNAMED_MODULE; 1040 log_debug(class, nestmates)("Dynamic nestmate: %s/%s, nest_host %s, %s", 1041 module_name, 1042 ik->external_name(), 1043 host_class->external_name(), 1044 ik->is_hidden() ? "is hidden" : "is not hidden"); 1045 } 1046 } 1047 1048 if ((!is_hidden || is_nestmate) && !Reflection::is_same_class_package(lookup_k, ik)) { 1049 // non-hidden class or nestmate class must be in the same package as the Lookup class 1050 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class and defined class are in different packages"); 1051 } 1052 1053 if (init) { 1054 ik->initialize(CHECK_NULL); 1055 } else { 1056 ik->link_class(CHECK_NULL); 1057 } 1058 1059 return (jclass) JNIHandles::make_local(THREAD, ik->java_mirror()); 1060 } 1061 1062 JVM_ENTRY_PROF(jclass, JVM_DefineClass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd)) 1063 return jvm_define_class_common(name, loader, buf, len, pd, nullptr, THREAD); 1064 JVM_END 1065 1066 /* 1067 * Define a class with the specified lookup class. 1068 * lookup: Lookup class 1069 * name: the name of the class 1070 * buf: class bytes 1071 * len: length of class bytes 1072 * pd: protection domain 1073 * init: initialize the class 1074 * flags: properties of the class 1075 * classData: private static pre-initialized field 1076 */ 1077 JVM_ENTRY_PROF(jclass, JVM_LookupDefineClass, JVM_LookupDefineClass(JNIEnv *env, jclass lookup, const char *name, const jbyte *buf, 1078 jsize len, jobject pd, jboolean initialize, int flags, jobject classData)) 1079 1080 if (lookup == nullptr) { 1081 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class is null"); 1082 } 1083 1084 assert(buf != nullptr, "buf must not be null"); 1085 1086 return jvm_lookup_define_class(lookup, name, buf, len, pd, initialize, flags, classData, THREAD); 1087 JVM_END 1088 1089 JVM_ENTRY_PROF(jclass, JVM_DefineClassWithSource, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source)) 1090 return jvm_define_class_common(name, loader, buf, len, pd, source, THREAD); 1091 JVM_END 1092 1093 JVM_ENTRY_PROF(jclass, JVM_FindLoadedClass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name)) 1094 ResourceMark rm(THREAD); 1095 1096 Handle h_name (THREAD, JNIHandles::resolve_non_null(name)); 1097 char* str = java_lang_String::as_utf8_string(h_name()); 1098 1099 // Sanity check, don't expect null 1100 if (str == nullptr) return nullptr; 1101 1102 // Internalize the string, converting '.' to '/' in string. 1103 char* p = (char*)str; 1104 while (*p != '\0') { 1105 if (*p == '.') { 1106 *p = '/'; 1107 } 1108 p++; 1109 } 1110 1111 const int str_len = (int)(p - str); 1112 if (str_len > Symbol::max_length()) { 1113 // It's impossible to create this class; the name cannot fit 1114 // into the constant pool. 1115 return nullptr; 1116 } 1117 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len); 1118 1119 // Security Note: 1120 // The Java level wrapper will perform the necessary security check allowing 1121 // us to pass the null as the initiating class loader. 1122 Handle h_loader(THREAD, JNIHandles::resolve(loader)); 1123 Klass* k = SystemDictionary::find_instance_or_array_klass(THREAD, klass_name, 1124 h_loader, 1125 Handle()); 1126 #if INCLUDE_CDS 1127 if (k == nullptr) { 1128 // If the class is not already loaded, try to see if it's in the shared 1129 // archive for the current classloader (h_loader). 1130 k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL); 1131 } 1132 #endif 1133 return (k == nullptr) ? nullptr : 1134 (jclass) JNIHandles::make_local(THREAD, k->java_mirror()); 1135 JVM_END 1136 1137 // Module support ////////////////////////////////////////////////////////////////////////////// 1138 1139 JVM_ENTRY_PROF(void, JVM_DefineModule, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version, 1140 jstring location, jobjectArray packages)) 1141 Handle h_module (THREAD, JNIHandles::resolve(module)); 1142 Modules::define_module(h_module, is_open, version, location, packages, CHECK); 1143 JVM_END 1144 1145 JVM_ENTRY_PROF(void, JVM_SetBootLoaderUnnamedModule, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module)) 1146 Handle h_module (THREAD, JNIHandles::resolve(module)); 1147 Modules::set_bootloader_unnamed_module(h_module, CHECK); 1148 JVM_END 1149 1150 JVM_ENTRY_PROF(void, JVM_AddModuleExports, JVM_AddModuleExports(JNIEnv *env, jobject from_module, jstring package, jobject to_module)) 1151 Handle h_from_module (THREAD, JNIHandles::resolve(from_module)); 1152 Handle h_to_module (THREAD, JNIHandles::resolve(to_module)); 1153 Modules::add_module_exports_qualified(h_from_module, package, h_to_module, CHECK); 1154 JVM_END 1155 1156 JVM_ENTRY_PROF(void, JVM_AddModuleExportsToAllUnnamed, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, jstring package)) 1157 Handle h_from_module (THREAD, JNIHandles::resolve(from_module)); 1158 Modules::add_module_exports_to_all_unnamed(h_from_module, package, CHECK); 1159 JVM_END 1160 1161 JVM_ENTRY_PROF(void, JVM_AddModuleExportsToAll, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, jstring package)) 1162 Handle h_from_module (THREAD, JNIHandles::resolve(from_module)); 1163 Modules::add_module_exports(h_from_module, package, Handle(), CHECK); 1164 JVM_END 1165 1166 JVM_ENTRY_PROF(void, JVM_AddReadsModule, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module)) 1167 Handle h_from_module (THREAD, JNIHandles::resolve(from_module)); 1168 Handle h_source_module (THREAD, JNIHandles::resolve(source_module)); 1169 Modules::add_reads_module(h_from_module, h_source_module, CHECK); 1170 JVM_END 1171 1172 JVM_ENTRY_PROF(void, JVM_DefineArchivedModules, JVM_DefineArchivedModules(JNIEnv *env, jobject platform_loader, jobject system_loader)) 1173 Handle h_platform_loader (THREAD, JNIHandles::resolve(platform_loader)); 1174 Handle h_system_loader (THREAD, JNIHandles::resolve(system_loader)); 1175 Modules::define_archived_modules(h_platform_loader, h_system_loader, CHECK); 1176 JVM_END 1177 1178 // Reflection support ////////////////////////////////////////////////////////////////////////////// 1179 1180 JVM_ENTRY_PROF(jstring, JVM_InitClassName, JVM_InitClassName(JNIEnv *env, jclass cls)) 1181 assert (cls != nullptr, "illegal class"); 1182 JvmtiVMObjectAllocEventCollector oam; 1183 ResourceMark rm(THREAD); 1184 HandleMark hm(THREAD); 1185 Handle java_class(THREAD, JNIHandles::resolve(cls)); 1186 oop result = java_lang_Class::name(java_class, CHECK_NULL); 1187 return (jstring) JNIHandles::make_local(THREAD, result); 1188 JVM_END 1189 1190 1191 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassInterfaces, JVM_GetClassInterfaces(JNIEnv *env, jclass cls)) 1192 JvmtiVMObjectAllocEventCollector oam; 1193 oop mirror = JNIHandles::resolve_non_null(cls); 1194 1195 // Special handling for primitive objects 1196 if (java_lang_Class::is_primitive(mirror)) { 1197 // Primitive objects does not have any interfaces 1198 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL); 1199 return (jobjectArray) JNIHandles::make_local(THREAD, r); 1200 } 1201 1202 Klass* klass = java_lang_Class::as_Klass(mirror); 1203 // Figure size of result array 1204 int size; 1205 if (klass->is_instance_klass()) { 1206 size = InstanceKlass::cast(klass)->local_interfaces()->length(); 1207 } else { 1208 assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass"); 1209 size = 2; 1210 } 1211 1212 // Allocate result array 1213 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), size, CHECK_NULL); 1214 objArrayHandle result (THREAD, r); 1215 // Fill in result 1216 if (klass->is_instance_klass()) { 1217 // Regular instance klass, fill in all local interfaces 1218 for (int index = 0; index < size; index++) { 1219 Klass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index); 1220 result->obj_at_put(index, k->java_mirror()); 1221 } 1222 } else { 1223 // All arrays implement java.lang.Cloneable and java.io.Serializable 1224 result->obj_at_put(0, vmClasses::Cloneable_klass()->java_mirror()); 1225 result->obj_at_put(1, vmClasses::Serializable_klass()->java_mirror()); 1226 } 1227 return (jobjectArray) JNIHandles::make_local(THREAD, result()); 1228 JVM_END 1229 1230 1231 JVM_ENTRY_PROF(jboolean, JVM_IsInterface, JVM_IsInterface(JNIEnv *env, jclass cls)) 1232 oop mirror = JNIHandles::resolve_non_null(cls); 1233 if (java_lang_Class::is_primitive(mirror)) { 1234 return JNI_FALSE; 1235 } 1236 Klass* k = java_lang_Class::as_Klass(mirror); 1237 jboolean result = k->is_interface(); 1238 assert(!result || k->is_instance_klass(), 1239 "all interfaces are instance types"); 1240 // The compiler intrinsic for isInterface tests the 1241 // Klass::_access_flags bits in the same way. 1242 return result; 1243 JVM_END 1244 1245 JVM_ENTRY_PROF(jboolean, JVM_IsHiddenClass, JVM_IsHiddenClass(JNIEnv *env, jclass cls)) 1246 oop mirror = JNIHandles::resolve_non_null(cls); 1247 if (java_lang_Class::is_primitive(mirror)) { 1248 return JNI_FALSE; 1249 } 1250 Klass* k = java_lang_Class::as_Klass(mirror); 1251 return k->is_hidden(); 1252 JVM_END 1253 1254 JVM_ENTRY_PROF(jobject, JVM_GetProtectionDomain, JVM_GetProtectionDomain(JNIEnv *env, jclass cls)) 1255 oop mirror = JNIHandles::resolve_non_null(cls); 1256 if (mirror == nullptr) { 1257 THROW_(vmSymbols::java_lang_NullPointerException(), nullptr); 1258 } 1259 1260 if (java_lang_Class::is_primitive(mirror)) { 1261 // Primitive types does not have a protection domain. 1262 return nullptr; 1263 } 1264 1265 oop pd = java_lang_Class::protection_domain(mirror); 1266 return (jobject) JNIHandles::make_local(THREAD, pd); 1267 JVM_END 1268 1269 1270 // Returns the inherited_access_control_context field of the running thread. 1271 JVM_ENTRY_PROF(jobject, JVM_GetInheritedAccessControlContext, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls)) 1272 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj()); 1273 return JNIHandles::make_local(THREAD, result); 1274 JVM_END 1275 1276 JVM_ENTRY_PROF(jobject, JVM_GetStackAccessControlContext, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls)) 1277 if (!UsePrivilegedStack) return nullptr; 1278 1279 ResourceMark rm(THREAD); 1280 GrowableArray<Handle>* local_array = new GrowableArray<Handle>(12); 1281 JvmtiVMObjectAllocEventCollector oam; 1282 1283 // count the protection domains on the execution stack. We collapse 1284 // duplicate consecutive protection domains into a single one, as 1285 // well as stopping when we hit a privileged frame. 1286 1287 oop previous_protection_domain = nullptr; 1288 Handle privileged_context(thread, nullptr); 1289 bool is_privileged = false; 1290 oop protection_domain = nullptr; 1291 1292 // Iterate through Java frames 1293 vframeStream vfst(thread); 1294 for(; !vfst.at_end(); vfst.next()) { 1295 // get method of frame 1296 Method* method = vfst.method(); 1297 1298 // stop at the first privileged frame 1299 if (method->method_holder() == vmClasses::AccessController_klass() && 1300 method->name() == vmSymbols::executePrivileged_name()) 1301 { 1302 // this frame is privileged 1303 is_privileged = true; 1304 1305 javaVFrame *priv = vfst.asJavaVFrame(); // executePrivileged 1306 1307 StackValueCollection* locals = priv->locals(); 1308 StackValue* ctx_sv = locals->at(1); // AccessControlContext context 1309 StackValue* clr_sv = locals->at(2); // Class<?> caller 1310 assert(!ctx_sv->obj_is_scalar_replaced(), "found scalar-replaced object"); 1311 assert(!clr_sv->obj_is_scalar_replaced(), "found scalar-replaced object"); 1312 privileged_context = ctx_sv->get_obj(); 1313 Handle caller = clr_sv->get_obj(); 1314 1315 Klass *caller_klass = java_lang_Class::as_Klass(caller()); 1316 protection_domain = caller_klass->protection_domain(); 1317 } else { 1318 protection_domain = method->method_holder()->protection_domain(); 1319 } 1320 1321 if ((previous_protection_domain != protection_domain) && (protection_domain != nullptr)) { 1322 local_array->push(Handle(thread, protection_domain)); 1323 previous_protection_domain = protection_domain; 1324 } 1325 1326 if (is_privileged) break; 1327 } 1328 1329 1330 // either all the domains on the stack were system domains, or 1331 // we had a privileged system domain 1332 if (local_array->is_empty()) { 1333 if (is_privileged && privileged_context.is_null()) return nullptr; 1334 1335 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL); 1336 return JNIHandles::make_local(THREAD, result); 1337 } 1338 1339 objArrayOop context = oopFactory::new_objArray(vmClasses::ProtectionDomain_klass(), 1340 local_array->length(), CHECK_NULL); 1341 objArrayHandle h_context(thread, context); 1342 for (int index = 0; index < local_array->length(); index++) { 1343 h_context->obj_at_put(index, local_array->at(index)()); 1344 } 1345 1346 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL); 1347 1348 return JNIHandles::make_local(THREAD, result); 1349 JVM_END 1350 1351 class ScopedValueBindingsResolver { 1352 public: 1353 InstanceKlass* Carrier_klass; 1354 ScopedValueBindingsResolver(JavaThread* THREAD) { 1355 Klass *k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_ScopedValue_Carrier(), true, THREAD); 1356 Carrier_klass = InstanceKlass::cast(k); 1357 } 1358 }; 1359 1360 JVM_ENTRY_PROF(jobject, JVM_FindScopedValueBindings, JVM_FindScopedValueBindings(JNIEnv *env, jclass cls)) 1361 ResourceMark rm(THREAD); 1362 GrowableArray<Handle>* local_array = new GrowableArray<Handle>(12); 1363 JvmtiVMObjectAllocEventCollector oam; 1364 1365 static ScopedValueBindingsResolver resolver(THREAD); 1366 1367 // Iterate through Java frames 1368 vframeStream vfst(thread); 1369 for(; !vfst.at_end(); vfst.next()) { 1370 int loc = -1; 1371 // get method of frame 1372 Method* method = vfst.method(); 1373 1374 Symbol *name = method->name(); 1375 1376 InstanceKlass* holder = method->method_holder(); 1377 if (name == vmSymbols::runWith_method_name()) { 1378 if (holder == vmClasses::Thread_klass() 1379 || holder == resolver.Carrier_klass) { 1380 loc = 1; 1381 } 1382 } 1383 1384 if (loc != -1) { 1385 javaVFrame *frame = vfst.asJavaVFrame(); 1386 StackValueCollection* locals = frame->locals(); 1387 StackValue* head_sv = locals->at(loc); // java/lang/ScopedValue$Snapshot 1388 Handle result = head_sv->get_obj(); 1389 assert(!head_sv->obj_is_scalar_replaced(), "found scalar-replaced object"); 1390 if (result() != nullptr) { 1391 return JNIHandles::make_local(THREAD, result()); 1392 } 1393 } 1394 } 1395 1396 return nullptr; 1397 JVM_END 1398 1399 JVM_ENTRY_PROF(jboolean, JVM_IsArrayClass, JVM_IsArrayClass(JNIEnv *env, jclass cls)) 1400 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1401 return (k != nullptr) && k->is_array_klass() ? true : false; 1402 JVM_END 1403 1404 1405 JVM_ENTRY_PROF(jboolean, JVM_IsPrimitiveClass, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls)) 1406 oop mirror = JNIHandles::resolve_non_null(cls); 1407 return (jboolean) java_lang_Class::is_primitive(mirror); 1408 JVM_END 1409 1410 1411 JVM_ENTRY_PROF(jint, JVM_GetClassModifiers, JVM_GetClassModifiers(JNIEnv *env, jclass cls)) 1412 oop mirror = JNIHandles::resolve_non_null(cls); 1413 if (java_lang_Class::is_primitive(mirror)) { 1414 // Primitive type 1415 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 1416 } 1417 1418 Klass* k = java_lang_Class::as_Klass(mirror); 1419 debug_only(int computed_modifiers = k->compute_modifier_flags()); 1420 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK"); 1421 return k->modifier_flags(); 1422 JVM_END 1423 1424 1425 // Inner class reflection /////////////////////////////////////////////////////////////////////////////// 1426 1427 JVM_ENTRY_PROF(jobjectArray, JVM_GetDeclaredClasses, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass)) 1428 JvmtiVMObjectAllocEventCollector oam; 1429 // ofClass is a reference to a java_lang_Class object. The mirror object 1430 // of an InstanceKlass 1431 oop ofMirror = JNIHandles::resolve_non_null(ofClass); 1432 if (java_lang_Class::is_primitive(ofMirror) || 1433 ! java_lang_Class::as_Klass(ofMirror)->is_instance_klass()) { 1434 oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL); 1435 return (jobjectArray)JNIHandles::make_local(THREAD, result); 1436 } 1437 1438 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(ofMirror)); 1439 InnerClassesIterator iter(k); 1440 1441 if (iter.length() == 0) { 1442 // Neither an inner nor outer class 1443 oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL); 1444 return (jobjectArray)JNIHandles::make_local(THREAD, result); 1445 } 1446 1447 // find inner class info 1448 constantPoolHandle cp(thread, k->constants()); 1449 int length = iter.length(); 1450 1451 // Allocate temp. result array 1452 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), length/4, CHECK_NULL); 1453 objArrayHandle result (THREAD, r); 1454 int members = 0; 1455 1456 for (; !iter.done(); iter.next()) { 1457 int ioff = iter.inner_class_info_index(); 1458 int ooff = iter.outer_class_info_index(); 1459 1460 if (ioff != 0 && ooff != 0) { 1461 // Check to see if the name matches the class we're looking for 1462 // before attempting to find the class. 1463 if (cp->klass_name_at_matches(k, ooff)) { 1464 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL); 1465 if (outer_klass == k) { 1466 Klass* ik = cp->klass_at(ioff, CHECK_NULL); 1467 InstanceKlass* inner_klass = InstanceKlass::cast(ik); 1468 1469 // Throws an exception if outer klass has not declared k as 1470 // an inner klass 1471 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL); 1472 1473 result->obj_at_put(members, inner_klass->java_mirror()); 1474 members++; 1475 } 1476 } 1477 } 1478 } 1479 1480 if (members != length) { 1481 // Return array of right length 1482 objArrayOop res = oopFactory::new_objArray(vmClasses::Class_klass(), members, CHECK_NULL); 1483 for(int i = 0; i < members; i++) { 1484 res->obj_at_put(i, result->obj_at(i)); 1485 } 1486 return (jobjectArray)JNIHandles::make_local(THREAD, res); 1487 } 1488 1489 return (jobjectArray)JNIHandles::make_local(THREAD, result()); 1490 JVM_END 1491 1492 1493 JVM_ENTRY_PROF(jclass, JVM_GetDeclaringClass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass)) 1494 { 1495 // ofClass is a reference to a java_lang_Class object. 1496 oop ofMirror = JNIHandles::resolve_non_null(ofClass); 1497 if (java_lang_Class::is_primitive(ofMirror)) { 1498 return nullptr; 1499 } 1500 Klass* klass = java_lang_Class::as_Klass(ofMirror); 1501 if (!klass->is_instance_klass()) { 1502 return nullptr; 1503 } 1504 1505 bool inner_is_member = false; 1506 Klass* outer_klass 1507 = InstanceKlass::cast(klass)->compute_enclosing_class(&inner_is_member, CHECK_NULL); 1508 if (outer_klass == nullptr) return nullptr; // already a top-level class 1509 if (!inner_is_member) return nullptr; // a hidden class (inside a method) 1510 return (jclass) JNIHandles::make_local(THREAD, outer_klass->java_mirror()); 1511 } 1512 JVM_END 1513 1514 JVM_ENTRY_PROF(jstring, JVM_GetSimpleBinaryName, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls)) 1515 { 1516 oop mirror = JNIHandles::resolve_non_null(cls); 1517 if (java_lang_Class::is_primitive(mirror)) { 1518 return nullptr; 1519 } 1520 Klass* klass = java_lang_Class::as_Klass(mirror); 1521 if (!klass->is_instance_klass()) { 1522 return nullptr; 1523 } 1524 InstanceKlass* k = InstanceKlass::cast(klass); 1525 int ooff = 0, noff = 0; 1526 if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) { 1527 if (noff != 0) { 1528 constantPoolHandle i_cp(thread, k->constants()); 1529 Symbol* name = i_cp->symbol_at(noff); 1530 Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL); 1531 return (jstring) JNIHandles::make_local(THREAD, str()); 1532 } 1533 } 1534 return nullptr; 1535 } 1536 JVM_END 1537 1538 JVM_ENTRY_PROF(jstring, JVM_GetClassSignature, JVM_GetClassSignature(JNIEnv *env, jclass cls)) 1539 assert (cls != nullptr, "illegal class"); 1540 JvmtiVMObjectAllocEventCollector oam; 1541 ResourceMark rm(THREAD); 1542 oop mirror = JNIHandles::resolve_non_null(cls); 1543 // Return null for arrays and primitives 1544 if (!java_lang_Class::is_primitive(mirror)) { 1545 Klass* k = java_lang_Class::as_Klass(mirror); 1546 if (k->is_instance_klass()) { 1547 Symbol* sym = InstanceKlass::cast(k)->generic_signature(); 1548 if (sym == nullptr) return nullptr; 1549 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 1550 return (jstring) JNIHandles::make_local(THREAD, str()); 1551 } 1552 } 1553 return nullptr; 1554 JVM_END 1555 1556 1557 JVM_ENTRY_PROF(jbyteArray, JVM_GetClassAnnotations, JVM_GetClassAnnotations(JNIEnv *env, jclass cls)) 1558 assert (cls != nullptr, "illegal class"); 1559 oop mirror = JNIHandles::resolve_non_null(cls); 1560 // Return null for arrays and primitives 1561 if (!java_lang_Class::is_primitive(mirror)) { 1562 Klass* k = java_lang_Class::as_Klass(mirror); 1563 if (k->is_instance_klass()) { 1564 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL); 1565 return (jbyteArray) JNIHandles::make_local(THREAD, a); 1566 } 1567 } 1568 return nullptr; 1569 JVM_END 1570 1571 1572 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd) { 1573 // some of this code was adapted from from jni_FromReflectedField 1574 1575 oop reflected = JNIHandles::resolve_non_null(field); 1576 oop mirror = java_lang_reflect_Field::clazz(reflected); 1577 Klass* k = java_lang_Class::as_Klass(mirror); 1578 int slot = java_lang_reflect_Field::slot(reflected); 1579 int modifiers = java_lang_reflect_Field::modifiers(reflected); 1580 1581 InstanceKlass* ik = InstanceKlass::cast(k); 1582 int offset = ik->field_offset(slot); 1583 1584 if (modifiers & JVM_ACC_STATIC) { 1585 // for static fields we only look in the current class 1586 if (!ik->find_local_field_from_offset(offset, true, &fd)) { 1587 assert(false, "cannot find static field"); 1588 return false; 1589 } 1590 } else { 1591 // for instance fields we start with the current class and work 1592 // our way up through the superclass chain 1593 if (!ik->find_field_from_offset(offset, false, &fd)) { 1594 assert(false, "cannot find instance field"); 1595 return false; 1596 } 1597 } 1598 return true; 1599 } 1600 1601 static Method* jvm_get_method_common(jobject method) { 1602 // some of this code was adapted from from jni_FromReflectedMethod 1603 1604 oop reflected = JNIHandles::resolve_non_null(method); 1605 oop mirror = nullptr; 1606 int slot = 0; 1607 1608 if (reflected->klass() == vmClasses::reflect_Constructor_klass()) { 1609 mirror = java_lang_reflect_Constructor::clazz(reflected); 1610 slot = java_lang_reflect_Constructor::slot(reflected); 1611 } else { 1612 assert(reflected->klass() == vmClasses::reflect_Method_klass(), 1613 "wrong type"); 1614 mirror = java_lang_reflect_Method::clazz(reflected); 1615 slot = java_lang_reflect_Method::slot(reflected); 1616 } 1617 Klass* k = java_lang_Class::as_Klass(mirror); 1618 1619 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot); 1620 assert(m != nullptr, "cannot find method"); 1621 return m; // caller has to deal with null in product mode 1622 } 1623 1624 /* Type use annotations support (JDK 1.8) */ 1625 1626 JVM_ENTRY_PROF(jbyteArray, JVM_GetClassTypeAnnotations, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls)) 1627 assert (cls != nullptr, "illegal class"); 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->is_instance_klass()) { 1633 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations(); 1634 if (type_annotations != nullptr) { 1635 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL); 1636 return (jbyteArray) JNIHandles::make_local(THREAD, a); 1637 } 1638 } 1639 } 1640 return nullptr; 1641 JVM_END 1642 1643 JVM_ENTRY_PROF(jbyteArray, JVM_GetMethodTypeAnnotations, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method)) 1644 assert (method != nullptr, "illegal method"); 1645 // method is a handle to a java.lang.reflect.Method object 1646 Method* m = jvm_get_method_common(method); 1647 if (m == nullptr) { 1648 return nullptr; 1649 } 1650 1651 AnnotationArray* type_annotations = m->type_annotations(); 1652 if (type_annotations != nullptr) { 1653 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL); 1654 return (jbyteArray) JNIHandles::make_local(THREAD, a); 1655 } 1656 1657 return nullptr; 1658 JVM_END 1659 1660 JVM_ENTRY_PROF(jbyteArray, JVM_GetFieldTypeAnnotations, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field)) 1661 assert (field != nullptr, "illegal field"); 1662 fieldDescriptor fd; 1663 bool gotFd = jvm_get_field_common(field, fd); 1664 if (!gotFd) { 1665 return nullptr; 1666 } 1667 1668 return (jbyteArray) JNIHandles::make_local(THREAD, Annotations::make_java_array(fd.type_annotations(), THREAD)); 1669 JVM_END 1670 1671 static void bounds_check(const constantPoolHandle& cp, jint index, TRAPS) { 1672 if (!cp->is_within_bounds(index)) { 1673 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds"); 1674 } 1675 } 1676 1677 JVM_ENTRY_PROF(jobjectArray, JVM_GetMethodParameters, JVM_GetMethodParameters(JNIEnv *env, jobject method)) 1678 { 1679 // method is a handle to a java.lang.reflect.Method object 1680 Method* method_ptr = jvm_get_method_common(method); 1681 methodHandle mh (THREAD, method_ptr); 1682 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method)); 1683 const int num_params = mh->method_parameters_length(); 1684 1685 if (num_params < 0) { 1686 // A -1 return value from method_parameters_length means there is no 1687 // parameter data. Return null to indicate this to the reflection 1688 // API. 1689 assert(num_params == -1, "num_params should be -1 if it is less than zero"); 1690 return (jobjectArray)nullptr; 1691 } else { 1692 // Otherwise, we return something up to reflection, even if it is 1693 // a zero-length array. Why? Because in some cases this can 1694 // trigger a MalformedParametersException. 1695 1696 // make sure all the symbols are properly formatted 1697 for (int i = 0; i < num_params; i++) { 1698 MethodParametersElement* params = mh->method_parameters_start(); 1699 int index = params[i].name_cp_index; 1700 constantPoolHandle cp(THREAD, mh->constants()); 1701 bounds_check(cp, index, CHECK_NULL); 1702 1703 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) { 1704 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), 1705 "Wrong type at constant pool index"); 1706 } 1707 1708 } 1709 1710 objArrayOop result_oop = oopFactory::new_objArray(vmClasses::reflect_Parameter_klass(), num_params, CHECK_NULL); 1711 objArrayHandle result (THREAD, result_oop); 1712 1713 for (int i = 0; i < num_params; i++) { 1714 MethodParametersElement* params = mh->method_parameters_start(); 1715 // For a 0 index, give a null symbol 1716 Symbol* sym = 0 != params[i].name_cp_index ? 1717 mh->constants()->symbol_at(params[i].name_cp_index) : nullptr; 1718 int flags = params[i].flags; 1719 oop param = Reflection::new_parameter(reflected_method, i, sym, 1720 flags, CHECK_NULL); 1721 result->obj_at_put(i, param); 1722 } 1723 return (jobjectArray)JNIHandles::make_local(THREAD, result()); 1724 } 1725 } 1726 JVM_END 1727 1728 // New (JDK 1.4) reflection implementation ///////////////////////////////////// 1729 1730 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassDeclaredFields, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1731 { 1732 JvmtiVMObjectAllocEventCollector oam; 1733 1734 oop ofMirror = JNIHandles::resolve_non_null(ofClass); 1735 // Exclude primitive types and array types 1736 if (java_lang_Class::is_primitive(ofMirror) || 1737 java_lang_Class::as_Klass(ofMirror)->is_array_klass()) { 1738 // Return empty array 1739 oop res = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), 0, CHECK_NULL); 1740 return (jobjectArray) JNIHandles::make_local(THREAD, res); 1741 } 1742 1743 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(ofMirror)); 1744 constantPoolHandle cp(THREAD, k->constants()); 1745 1746 // Ensure class is linked 1747 k->link_class(CHECK_NULL); 1748 1749 // Allocate result 1750 int num_fields; 1751 1752 if (publicOnly) { 1753 num_fields = 0; 1754 for (JavaFieldStream fs(k); !fs.done(); fs.next()) { 1755 if (fs.access_flags().is_public()) ++num_fields; 1756 } 1757 } else { 1758 num_fields = k->java_fields_count(); 1759 } 1760 1761 objArrayOop r = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), num_fields, CHECK_NULL); 1762 objArrayHandle result (THREAD, r); 1763 1764 int out_idx = 0; 1765 fieldDescriptor fd; 1766 for (JavaFieldStream fs(k); !fs.done(); fs.next()) { 1767 if (!publicOnly || fs.access_flags().is_public()) { 1768 fd.reinitialize(k, fs.index()); 1769 oop field = Reflection::new_field(&fd, CHECK_NULL); 1770 result->obj_at_put(out_idx, field); 1771 ++out_idx; 1772 } 1773 } 1774 assert(out_idx == num_fields, "just checking"); 1775 return (jobjectArray) JNIHandles::make_local(THREAD, result()); 1776 } 1777 JVM_END 1778 1779 // A class is a record if and only if it is final and a direct subclass of 1780 // java.lang.Record and has a Record attribute; otherwise, it is not a record. 1781 JVM_ENTRY_PROF(jboolean, JVM_IsRecord, JVM_IsRecord(JNIEnv *env, jclass cls)) 1782 { 1783 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 1784 if (k != nullptr && k->is_instance_klass()) { 1785 InstanceKlass* ik = InstanceKlass::cast(k); 1786 return ik->is_record(); 1787 } else { 1788 return false; 1789 } 1790 } 1791 JVM_END 1792 1793 // Returns an array containing the components of the Record attribute, 1794 // or null if the attribute is not present. 1795 // 1796 // Note that this function returns the components of the Record attribute 1797 // even if the class is not a record. 1798 JVM_ENTRY_PROF(jobjectArray, JVM_GetRecordComponents, JVM_GetRecordComponents(JNIEnv* env, jclass ofClass)) 1799 { 1800 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)); 1801 assert(c->is_instance_klass(), "must be"); 1802 InstanceKlass* ik = InstanceKlass::cast(c); 1803 1804 Array<RecordComponent*>* components = ik->record_components(); 1805 if (components != nullptr) { 1806 JvmtiVMObjectAllocEventCollector oam; 1807 constantPoolHandle cp(THREAD, ik->constants()); 1808 int length = components->length(); 1809 assert(length >= 0, "unexpected record_components length"); 1810 objArrayOop record_components = 1811 oopFactory::new_objArray(vmClasses::RecordComponent_klass(), length, CHECK_NULL); 1812 objArrayHandle components_h (THREAD, record_components); 1813 1814 for (int x = 0; x < length; x++) { 1815 RecordComponent* component = components->at(x); 1816 assert(component != nullptr, "unexpected null record component"); 1817 oop component_oop = java_lang_reflect_RecordComponent::create(ik, component, CHECK_NULL); 1818 components_h->obj_at_put(x, component_oop); 1819 } 1820 return (jobjectArray)JNIHandles::make_local(THREAD, components_h()); 1821 } 1822 1823 return nullptr; 1824 } 1825 JVM_END 1826 1827 static bool select_method(const methodHandle& method, bool want_constructor) { 1828 if (want_constructor) { 1829 return (method->is_initializer() && !method->is_static()); 1830 } else { 1831 return (!method->is_initializer() && !method->is_overpass()); 1832 } 1833 } 1834 1835 static jobjectArray get_class_declared_methods_helper( 1836 JNIEnv *env, 1837 jclass ofClass, jboolean publicOnly, 1838 bool want_constructor, 1839 Klass* klass, TRAPS) { 1840 1841 JvmtiVMObjectAllocEventCollector oam; 1842 1843 oop ofMirror = JNIHandles::resolve_non_null(ofClass); 1844 // Exclude primitive types and array types 1845 if (java_lang_Class::is_primitive(ofMirror) 1846 || java_lang_Class::as_Klass(ofMirror)->is_array_klass()) { 1847 // Return empty array 1848 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL); 1849 return (jobjectArray) JNIHandles::make_local(THREAD, res); 1850 } 1851 1852 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(ofMirror)); 1853 1854 // Ensure class is linked 1855 k->link_class(CHECK_NULL); 1856 1857 Array<Method*>* methods = k->methods(); 1858 int methods_length = methods->length(); 1859 1860 // Save original method_idnum in case of redefinition, which can change 1861 // the idnum of obsolete methods. The new method will have the same idnum 1862 // but if we refresh the methods array, the counts will be wrong. 1863 ResourceMark rm(THREAD); 1864 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length); 1865 int num_methods = 0; 1866 1867 for (int i = 0; i < methods_length; i++) { 1868 methodHandle method(THREAD, methods->at(i)); 1869 if (select_method(method, want_constructor)) { 1870 if (!publicOnly || method->is_public()) { 1871 idnums->push(method->method_idnum()); 1872 ++num_methods; 1873 } 1874 } 1875 } 1876 1877 // Allocate result 1878 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL); 1879 objArrayHandle result (THREAD, r); 1880 1881 // Now just put the methods that we selected above, but go by their idnum 1882 // in case of redefinition. The methods can be redefined at any safepoint, 1883 // so above when allocating the oop array and below when creating reflect 1884 // objects. 1885 for (int i = 0; i < num_methods; i++) { 1886 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i))); 1887 if (method.is_null()) { 1888 // Method may have been deleted and seems this API can handle null 1889 // Otherwise should probably put a method that throws NSME 1890 result->obj_at_put(i, nullptr); 1891 } else { 1892 oop m; 1893 if (want_constructor) { 1894 m = Reflection::new_constructor(method, CHECK_NULL); 1895 } else { 1896 m = Reflection::new_method(method, false, CHECK_NULL); 1897 } 1898 result->obj_at_put(i, m); 1899 } 1900 } 1901 1902 return (jobjectArray) JNIHandles::make_local(THREAD, result()); 1903 } 1904 1905 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassDeclaredMethods, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1906 { 1907 return get_class_declared_methods_helper(env, ofClass, publicOnly, 1908 /*want_constructor*/ false, 1909 vmClasses::reflect_Method_klass(), THREAD); 1910 } 1911 JVM_END 1912 1913 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassDeclaredConstructors, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly)) 1914 { 1915 return get_class_declared_methods_helper(env, ofClass, publicOnly, 1916 /*want_constructor*/ true, 1917 vmClasses::reflect_Constructor_klass(), THREAD); 1918 } 1919 JVM_END 1920 1921 JVM_ENTRY_PROF(jint, JVM_GetClassAccessFlags, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls)) 1922 { 1923 oop mirror = JNIHandles::resolve_non_null(cls); 1924 if (java_lang_Class::is_primitive(mirror)) { 1925 // Primitive type 1926 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; 1927 } 1928 1929 Klass* k = java_lang_Class::as_Klass(mirror); 1930 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS; 1931 } 1932 JVM_END 1933 1934 JVM_ENTRY_PROF(jboolean, JVM_AreNestMates, JVM_AreNestMates(JNIEnv *env, jclass current, jclass member)) 1935 { 1936 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current)); 1937 assert(c->is_instance_klass(), "must be"); 1938 InstanceKlass* ck = InstanceKlass::cast(c); 1939 Klass* m = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(member)); 1940 assert(m->is_instance_klass(), "must be"); 1941 InstanceKlass* mk = InstanceKlass::cast(m); 1942 return ck->has_nestmate_access_to(mk, THREAD); 1943 } 1944 JVM_END 1945 1946 JVM_ENTRY_PROF(jclass, JVM_GetNestHost, JVM_GetNestHost(JNIEnv* env, jclass current)) 1947 { 1948 // current is not a primitive or array class 1949 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current)); 1950 assert(c->is_instance_klass(), "must be"); 1951 InstanceKlass* ck = InstanceKlass::cast(c); 1952 InstanceKlass* host = ck->nest_host(THREAD); 1953 return (jclass) (host == nullptr ? nullptr : 1954 JNIHandles::make_local(THREAD, host->java_mirror())); 1955 } 1956 JVM_END 1957 1958 JVM_ENTRY_PROF(jobjectArray, JVM_GetNestMembers, JVM_GetNestMembers(JNIEnv* env, jclass current)) 1959 { 1960 // current is not a primitive or array class 1961 ResourceMark rm(THREAD); 1962 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current)); 1963 assert(c->is_instance_klass(), "must be"); 1964 InstanceKlass* ck = InstanceKlass::cast(c); 1965 InstanceKlass* host = ck->nest_host(THREAD); 1966 1967 log_trace(class, nestmates)("Calling GetNestMembers for type %s with nest-host %s", 1968 ck->external_name(), host->external_name()); 1969 { 1970 JvmtiVMObjectAllocEventCollector oam; 1971 Array<u2>* members = host->nest_members(); 1972 int length = members == nullptr ? 0 : members->length(); 1973 1974 log_trace(class, nestmates)(" - host has %d listed nest members", length); 1975 1976 // nest host is first in the array so make it one bigger 1977 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), 1978 length + 1, CHECK_NULL); 1979 objArrayHandle result(THREAD, r); 1980 result->obj_at_put(0, host->java_mirror()); 1981 if (length != 0) { 1982 int count = 0; 1983 for (int i = 0; i < length; i++) { 1984 int cp_index = members->at(i); 1985 Klass* k = host->constants()->klass_at(cp_index, THREAD); 1986 if (HAS_PENDING_EXCEPTION) { 1987 if (PENDING_EXCEPTION->is_a(vmClasses::VirtualMachineError_klass())) { 1988 return nullptr; // propagate VMEs 1989 } 1990 if (log_is_enabled(Trace, class, nestmates)) { 1991 stringStream ss; 1992 char* target_member_class = host->constants()->klass_name_at(cp_index)->as_C_string(); 1993 ss.print(" - resolution of nest member %s failed: ", target_member_class); 1994 java_lang_Throwable::print(PENDING_EXCEPTION, &ss); 1995 log_trace(class, nestmates)("%s", ss.as_string()); 1996 } 1997 CLEAR_PENDING_EXCEPTION; 1998 continue; 1999 } 2000 if (k->is_instance_klass()) { 2001 InstanceKlass* ik = InstanceKlass::cast(k); 2002 InstanceKlass* nest_host_k = ik->nest_host(CHECK_NULL); 2003 if (nest_host_k == host) { 2004 result->obj_at_put(count+1, k->java_mirror()); 2005 count++; 2006 log_trace(class, nestmates)(" - [%d] = %s", count, ik->external_name()); 2007 } else { 2008 log_trace(class, nestmates)(" - skipping member %s with different host %s", 2009 ik->external_name(), nest_host_k->external_name()); 2010 } 2011 } else { 2012 log_trace(class, nestmates)(" - skipping member %s that is not an instance class", 2013 k->external_name()); 2014 } 2015 } 2016 if (count < length) { 2017 // we had invalid entries so we need to compact the array 2018 log_trace(class, nestmates)(" - compacting array from length %d to %d", 2019 length + 1, count + 1); 2020 2021 objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(), 2022 count + 1, CHECK_NULL); 2023 objArrayHandle result2(THREAD, r2); 2024 for (int i = 0; i < count + 1; i++) { 2025 result2->obj_at_put(i, result->obj_at(i)); 2026 } 2027 return (jobjectArray)JNIHandles::make_local(THREAD, result2()); 2028 } 2029 } 2030 else { 2031 assert(host == ck || ck->is_hidden(), "must be singleton nest or dynamic nestmate"); 2032 } 2033 return (jobjectArray)JNIHandles::make_local(THREAD, result()); 2034 } 2035 } 2036 JVM_END 2037 2038 JVM_ENTRY_PROF(jobjectArray, JVM_GetPermittedSubclasses, JVM_GetPermittedSubclasses(JNIEnv* env, jclass current)) 2039 { 2040 oop mirror = JNIHandles::resolve_non_null(current); 2041 assert(!java_lang_Class::is_primitive(mirror), "should not be"); 2042 Klass* c = java_lang_Class::as_Klass(mirror); 2043 assert(c->is_instance_klass(), "must be"); 2044 InstanceKlass* ik = InstanceKlass::cast(c); 2045 ResourceMark rm(THREAD); 2046 log_trace(class, sealed)("Calling GetPermittedSubclasses for %s type %s", 2047 ik->is_sealed() ? "sealed" : "non-sealed", ik->external_name()); 2048 if (ik->is_sealed()) { 2049 JvmtiVMObjectAllocEventCollector oam; 2050 Array<u2>* subclasses = ik->permitted_subclasses(); 2051 int length = subclasses->length(); 2052 2053 log_trace(class, sealed)(" - sealed class has %d permitted subclasses", length); 2054 2055 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), 2056 length, CHECK_NULL); 2057 objArrayHandle result(THREAD, r); 2058 int count = 0; 2059 for (int i = 0; i < length; i++) { 2060 int cp_index = subclasses->at(i); 2061 Klass* k = ik->constants()->klass_at(cp_index, THREAD); 2062 if (HAS_PENDING_EXCEPTION) { 2063 if (PENDING_EXCEPTION->is_a(vmClasses::VirtualMachineError_klass())) { 2064 return nullptr; // propagate VMEs 2065 } 2066 if (log_is_enabled(Trace, class, sealed)) { 2067 stringStream ss; 2068 char* permitted_subclass = ik->constants()->klass_name_at(cp_index)->as_C_string(); 2069 ss.print(" - resolution of permitted subclass %s failed: ", permitted_subclass); 2070 java_lang_Throwable::print(PENDING_EXCEPTION, &ss); 2071 log_trace(class, sealed)("%s", ss.as_string()); 2072 } 2073 2074 CLEAR_PENDING_EXCEPTION; 2075 continue; 2076 } 2077 if (k->is_instance_klass()) { 2078 result->obj_at_put(count++, k->java_mirror()); 2079 log_trace(class, sealed)(" - [%d] = %s", count, k->external_name()); 2080 } 2081 } 2082 if (count < length) { 2083 // we had invalid entries so we need to compact the array 2084 objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(), 2085 count, CHECK_NULL); 2086 objArrayHandle result2(THREAD, r2); 2087 for (int i = 0; i < count; i++) { 2088 result2->obj_at_put(i, result->obj_at(i)); 2089 } 2090 return (jobjectArray)JNIHandles::make_local(THREAD, result2()); 2091 } 2092 return (jobjectArray)JNIHandles::make_local(THREAD, result()); 2093 } else { 2094 return nullptr; 2095 } 2096 } 2097 JVM_END 2098 2099 // Constant pool access ////////////////////////////////////////////////////////// 2100 2101 JVM_ENTRY_PROF(jobject, JVM_GetClassConstantPool, JVM_GetClassConstantPool(JNIEnv *env, jclass cls)) 2102 { 2103 JvmtiVMObjectAllocEventCollector oam; 2104 oop mirror = JNIHandles::resolve_non_null(cls); 2105 // Return null for primitives and arrays 2106 if (!java_lang_Class::is_primitive(mirror)) { 2107 Klass* k = java_lang_Class::as_Klass(mirror); 2108 if (k->is_instance_klass()) { 2109 InstanceKlass* k_h = InstanceKlass::cast(k); 2110 Handle jcp = reflect_ConstantPool::create(CHECK_NULL); 2111 reflect_ConstantPool::set_cp(jcp(), k_h->constants()); 2112 return JNIHandles::make_local(THREAD, jcp()); 2113 } 2114 } 2115 return nullptr; 2116 } 2117 JVM_END 2118 2119 2120 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetSize, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused)) 2121 { 2122 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2123 return cp->length(); 2124 } 2125 JVM_END 2126 2127 2128 JVM_ENTRY_PROF(jclass, JVM_ConstantPoolGetClassAt, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2129 { 2130 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2131 bounds_check(cp, index, CHECK_NULL); 2132 constantTag tag = cp->tag_at(index); 2133 if (!tag.is_klass() && !tag.is_unresolved_klass()) { 2134 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2135 } 2136 Klass* k = cp->klass_at(index, CHECK_NULL); 2137 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror()); 2138 } 2139 JVM_END 2140 2141 JVM_ENTRY_PROF(jclass, JVM_ConstantPoolGetClassAtIfLoaded, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) 2142 { 2143 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2144 bounds_check(cp, index, CHECK_NULL); 2145 constantTag tag = cp->tag_at(index); 2146 if (!tag.is_klass() && !tag.is_unresolved_klass()) { 2147 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2148 } 2149 Klass* k = ConstantPool::klass_at_if_loaded(cp, index); 2150 if (k == nullptr) return nullptr; 2151 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror()); 2152 } 2153 JVM_END 2154 2155 static jobject get_method_at_helper(const constantPoolHandle& cp, jint index, bool force_resolution, TRAPS) { 2156 constantTag tag = cp->tag_at(index); 2157 if (!tag.is_method() && !tag.is_interface_method()) { 2158 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2159 } 2160 int klass_ref = cp->uncached_klass_ref_index_at(index); 2161 Klass* k_o; 2162 if (force_resolution) { 2163 k_o = cp->klass_at(klass_ref, CHECK_NULL); 2164 } else { 2165 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref); 2166 if (k_o == nullptr) return nullptr; 2167 } 2168 InstanceKlass* k = InstanceKlass::cast(k_o); 2169 Symbol* name = cp->uncached_name_ref_at(index); 2170 Symbol* sig = cp->uncached_signature_ref_at(index); 2171 methodHandle m (THREAD, k->find_method(name, sig)); 2172 if (m.is_null()) { 2173 THROW_MSG_NULL(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class"); 2174 } 2175 oop method; 2176 if (!m->is_initializer() || m->is_static()) { 2177 method = Reflection::new_method(m, true, CHECK_NULL); 2178 } else { 2179 method = Reflection::new_constructor(m, CHECK_NULL); 2180 } 2181 return JNIHandles::make_local(THREAD, method); 2182 } 2183 2184 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetMethodAt, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2185 { 2186 JvmtiVMObjectAllocEventCollector oam; 2187 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2188 bounds_check(cp, index, CHECK_NULL); 2189 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL); 2190 return res; 2191 } 2192 JVM_END 2193 2194 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetMethodAtIfLoaded, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) 2195 { 2196 JvmtiVMObjectAllocEventCollector oam; 2197 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2198 bounds_check(cp, index, CHECK_NULL); 2199 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL); 2200 return res; 2201 } 2202 JVM_END 2203 2204 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) { 2205 constantTag tag = cp->tag_at(index); 2206 if (!tag.is_field()) { 2207 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2208 } 2209 int klass_ref = cp->uncached_klass_ref_index_at(index); 2210 Klass* k_o; 2211 if (force_resolution) { 2212 k_o = cp->klass_at(klass_ref, CHECK_NULL); 2213 } else { 2214 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref); 2215 if (k_o == nullptr) return nullptr; 2216 } 2217 InstanceKlass* k = InstanceKlass::cast(k_o); 2218 Symbol* name = cp->uncached_name_ref_at(index); 2219 Symbol* sig = cp->uncached_signature_ref_at(index); 2220 fieldDescriptor fd; 2221 Klass* target_klass = k->find_field(name, sig, &fd); 2222 if (target_klass == nullptr) { 2223 THROW_MSG_NULL(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class"); 2224 } 2225 oop field = Reflection::new_field(&fd, CHECK_NULL); 2226 return JNIHandles::make_local(THREAD, field); 2227 } 2228 2229 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetFieldAt, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index)) 2230 { 2231 JvmtiVMObjectAllocEventCollector oam; 2232 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2233 bounds_check(cp, index, CHECK_NULL); 2234 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL); 2235 return res; 2236 } 2237 JVM_END 2238 2239 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetFieldAtIfLoaded, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index)) 2240 { 2241 JvmtiVMObjectAllocEventCollector oam; 2242 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2243 bounds_check(cp, index, CHECK_NULL); 2244 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL); 2245 return res; 2246 } 2247 JVM_END 2248 2249 JVM_ENTRY_PROF(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2250 { 2251 JvmtiVMObjectAllocEventCollector oam; 2252 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2253 bounds_check(cp, index, CHECK_NULL); 2254 constantTag tag = cp->tag_at(index); 2255 if (!tag.is_field_or_method()) { 2256 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2257 } 2258 int klass_ref = cp->uncached_klass_ref_index_at(index); 2259 Symbol* klass_name = cp->klass_name_at(klass_ref); 2260 Symbol* member_name = cp->uncached_name_ref_at(index); 2261 Symbol* member_sig = cp->uncached_signature_ref_at(index); 2262 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 3, CHECK_NULL); 2263 objArrayHandle dest(THREAD, dest_o); 2264 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL); 2265 dest->obj_at_put(0, str()); 2266 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL); 2267 dest->obj_at_put(1, str()); 2268 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL); 2269 dest->obj_at_put(2, str()); 2270 return (jobjectArray) JNIHandles::make_local(THREAD, dest()); 2271 } 2272 JVM_END 2273 2274 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetClassRefIndexAt, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2275 { 2276 JvmtiVMObjectAllocEventCollector oam; 2277 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2278 bounds_check(cp, index, CHECK_0); 2279 constantTag tag = cp->tag_at(index); 2280 if (!tag.is_field_or_method()) { 2281 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2282 } 2283 return (jint) cp->uncached_klass_ref_index_at(index); 2284 } 2285 JVM_END 2286 2287 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt, JVM_ConstantPoolGetNameAndTypeRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2288 { 2289 JvmtiVMObjectAllocEventCollector oam; 2290 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2291 bounds_check(cp, index, CHECK_0); 2292 constantTag tag = cp->tag_at(index); 2293 if (!tag.is_invoke_dynamic() && !tag.is_field_or_method()) { 2294 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2295 } 2296 return (jint) cp->uncached_name_and_type_ref_index_at(index); 2297 } 2298 JVM_END 2299 2300 JVM_ENTRY_PROF(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt, JVM_ConstantPoolGetNameAndTypeRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2301 { 2302 JvmtiVMObjectAllocEventCollector oam; 2303 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2304 bounds_check(cp, index, CHECK_NULL); 2305 constantTag tag = cp->tag_at(index); 2306 if (!tag.is_name_and_type()) { 2307 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2308 } 2309 Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index)); 2310 Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index)); 2311 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 2, CHECK_NULL); 2312 objArrayHandle dest(THREAD, dest_o); 2313 Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL); 2314 dest->obj_at_put(0, str()); 2315 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL); 2316 dest->obj_at_put(1, str()); 2317 return (jobjectArray) JNIHandles::make_local(THREAD, dest()); 2318 } 2319 JVM_END 2320 2321 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetIntAt, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2322 { 2323 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2324 bounds_check(cp, index, CHECK_0); 2325 constantTag tag = cp->tag_at(index); 2326 if (!tag.is_int()) { 2327 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2328 } 2329 return cp->int_at(index); 2330 } 2331 JVM_END 2332 2333 JVM_ENTRY_PROF(jlong, JVM_ConstantPoolGetLongAt, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2334 { 2335 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2336 bounds_check(cp, index, CHECK_(0L)); 2337 constantTag tag = cp->tag_at(index); 2338 if (!tag.is_long()) { 2339 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2340 } 2341 return cp->long_at(index); 2342 } 2343 JVM_END 2344 2345 JVM_ENTRY_PROF(jfloat, JVM_ConstantPoolGetFloatAt, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2346 { 2347 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2348 bounds_check(cp, index, CHECK_(0.0f)); 2349 constantTag tag = cp->tag_at(index); 2350 if (!tag.is_float()) { 2351 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2352 } 2353 return cp->float_at(index); 2354 } 2355 JVM_END 2356 2357 JVM_ENTRY_PROF(jdouble, JVM_ConstantPoolGetDoubleAt, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2358 { 2359 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2360 bounds_check(cp, index, CHECK_(0.0)); 2361 constantTag tag = cp->tag_at(index); 2362 if (!tag.is_double()) { 2363 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2364 } 2365 return cp->double_at(index); 2366 } 2367 JVM_END 2368 2369 JVM_ENTRY_PROF(jstring, JVM_ConstantPoolGetStringAt, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2370 { 2371 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2372 bounds_check(cp, index, CHECK_NULL); 2373 constantTag tag = cp->tag_at(index); 2374 if (!tag.is_string()) { 2375 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2376 } 2377 oop str = cp->string_at(index, CHECK_NULL); 2378 return (jstring) JNIHandles::make_local(THREAD, str); 2379 } 2380 JVM_END 2381 2382 JVM_ENTRY_PROF(jstring, JVM_ConstantPoolGetUTF8At, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index)) 2383 { 2384 JvmtiVMObjectAllocEventCollector oam; 2385 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2386 bounds_check(cp, index, CHECK_NULL); 2387 constantTag tag = cp->tag_at(index); 2388 if (!tag.is_symbol()) { 2389 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index"); 2390 } 2391 Symbol* sym = cp->symbol_at(index); 2392 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 2393 return (jstring) JNIHandles::make_local(THREAD, str()); 2394 } 2395 JVM_END 2396 2397 JVM_ENTRY_PROF(jbyte, JVM_ConstantPoolGetTagAt, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jobject unused, jint index)) 2398 { 2399 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj))); 2400 bounds_check(cp, index, CHECK_0); 2401 constantTag tag = cp->tag_at(index); 2402 jbyte result = tag.value(); 2403 // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105, 2404 // they are changed to the corresponding tags from the JVM spec, so that java code in 2405 // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones. 2406 if (tag.is_klass_or_reference()) { 2407 result = JVM_CONSTANT_Class; 2408 } else if (tag.is_string_index()) { 2409 result = JVM_CONSTANT_String; 2410 } else if (tag.is_method_type_in_error()) { 2411 result = JVM_CONSTANT_MethodType; 2412 } else if (tag.is_method_handle_in_error()) { 2413 result = JVM_CONSTANT_MethodHandle; 2414 } else if (tag.is_dynamic_constant_in_error()) { 2415 result = JVM_CONSTANT_Dynamic; 2416 } 2417 return result; 2418 } 2419 JVM_END 2420 2421 // Assertion support. ////////////////////////////////////////////////////////// 2422 2423 JVM_ENTRY_PROF(jboolean, JVM_DesiredAssertionStatus, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls)) 2424 assert(cls != nullptr, "bad class"); 2425 2426 oop r = JNIHandles::resolve(cls); 2427 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed"); 2428 if (java_lang_Class::is_primitive(r)) return false; 2429 2430 Klass* k = java_lang_Class::as_Klass(r); 2431 assert(k->is_instance_klass(), "must be an instance klass"); 2432 if (!k->is_instance_klass()) return false; 2433 2434 ResourceMark rm(THREAD); 2435 const char* name = k->name()->as_C_string(); 2436 bool system_class = k->class_loader() == nullptr; 2437 return JavaAssertions::enabled(name, system_class); 2438 2439 JVM_END 2440 2441 2442 // Return a new AssertionStatusDirectives object with the fields filled in with 2443 // command-line assertion arguments (i.e., -ea, -da). 2444 JVM_ENTRY_PROF(jobject, JVM_AssertionStatusDirectives, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused)) 2445 JvmtiVMObjectAllocEventCollector oam; 2446 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL); 2447 return JNIHandles::make_local(THREAD, asd); 2448 JVM_END 2449 2450 // Verification //////////////////////////////////////////////////////////////////////////////// 2451 2452 // Reflection for the verifier ///////////////////////////////////////////////////////////////// 2453 2454 // RedefineClasses support: bug 6214132 caused verification to fail. 2455 // All functions from this section should call the jvmtiThreadSate function: 2456 // Klass* class_to_verify_considering_redefinition(Klass* klass). 2457 // The function returns a Klass* of the _scratch_class if the verifier 2458 // was invoked in the middle of the class redefinition. 2459 // Otherwise it returns its argument value which is the _the_class Klass*. 2460 // Please, refer to the description in the jvmtiThreadSate.hpp. 2461 2462 JVM_ENTRY_PROF(const char*, JVM_GetClassNameUTF, JVM_GetClassNameUTF(JNIEnv *env, jclass cls)) 2463 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2464 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2465 return k->name()->as_utf8(); 2466 JVM_END 2467 2468 2469 JVM_ENTRY_PROF(void, JVM_GetClassCPTypes, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types)) 2470 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2471 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2472 // types will have length zero if this is not an InstanceKlass 2473 // (length is determined by call to JVM_GetClassCPEntriesCount) 2474 if (k->is_instance_klass()) { 2475 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2476 for (int index = cp->length() - 1; index >= 0; index--) { 2477 constantTag tag = cp->tag_at(index); 2478 types[index] = (tag.is_unresolved_klass()) ? (unsigned char) JVM_CONSTANT_Class : tag.value(); 2479 } 2480 } 2481 JVM_END 2482 2483 2484 JVM_ENTRY_PROF(jint, JVM_GetClassCPEntriesCount, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls)) 2485 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2486 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2487 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length(); 2488 JVM_END 2489 2490 2491 JVM_ENTRY_PROF(jint, JVM_GetClassFieldsCount, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls)) 2492 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2493 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2494 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count(); 2495 JVM_END 2496 2497 2498 JVM_ENTRY_PROF(jint, JVM_GetClassMethodsCount, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls)) 2499 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2500 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2501 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length(); 2502 JVM_END 2503 2504 2505 // The following methods, used for the verifier, are never called with 2506 // array klasses, so a direct cast to InstanceKlass is safe. 2507 // Typically, these methods are called in a loop with bounds determined 2508 // by the results of JVM_GetClass{Fields,Methods}Count, which return 2509 // zero for arrays. 2510 JVM_ENTRY_PROF(void, JVM_GetMethodIxExceptionIndexes, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions)) 2511 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2512 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2513 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2514 int length = method->checked_exceptions_length(); 2515 if (length > 0) { 2516 CheckedExceptionElement* table= method->checked_exceptions_start(); 2517 for (int i = 0; i < length; i++) { 2518 exceptions[i] = table[i].class_cp_index; 2519 } 2520 } 2521 JVM_END 2522 2523 2524 JVM_ENTRY_PROF(jint, JVM_GetMethodIxExceptionsCount, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index)) 2525 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2526 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2527 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2528 return method->checked_exceptions_length(); 2529 JVM_END 2530 2531 2532 JVM_ENTRY_PROF(void, JVM_GetMethodIxByteCode, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code)) 2533 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2534 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2535 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2536 memcpy(code, method->code_base(), method->code_size()); 2537 JVM_END 2538 2539 2540 JVM_ENTRY_PROF(jint, JVM_GetMethodIxByteCodeLength, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index)) 2541 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2542 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2543 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2544 return method->code_size(); 2545 JVM_END 2546 2547 2548 JVM_ENTRY_PROF(void, JVM_GetMethodIxExceptionTableEntry, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry)) 2549 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2550 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2551 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2552 ExceptionTable extable(method); 2553 entry->start_pc = extable.start_pc(entry_index); 2554 entry->end_pc = extable.end_pc(entry_index); 2555 entry->handler_pc = extable.handler_pc(entry_index); 2556 entry->catchType = extable.catch_type_index(entry_index); 2557 JVM_END 2558 2559 2560 JVM_ENTRY_PROF(jint, JVM_GetMethodIxExceptionTableLength, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index)) 2561 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2562 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2563 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2564 return method->exception_table_length(); 2565 JVM_END 2566 2567 2568 JVM_ENTRY_PROF(jint, JVM_GetMethodIxModifiers, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index)) 2569 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2570 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2571 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2572 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2573 JVM_END 2574 2575 2576 JVM_ENTRY_PROF(jint, JVM_GetFieldIxModifiers, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index)) 2577 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2578 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2579 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS; 2580 JVM_END 2581 2582 2583 JVM_ENTRY_PROF(jint, JVM_GetMethodIxLocalsCount, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index)) 2584 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2585 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2586 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2587 return method->max_locals(); 2588 JVM_END 2589 2590 2591 JVM_ENTRY_PROF(jint, JVM_GetMethodIxArgsSize, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index)) 2592 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2593 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2594 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2595 return method->size_of_parameters(); 2596 JVM_END 2597 2598 2599 JVM_ENTRY_PROF(jint, JVM_GetMethodIxMaxStack, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index)) 2600 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2601 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2602 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2603 return method->verifier_max_stack(); 2604 JVM_END 2605 2606 2607 JVM_ENTRY_PROF(jboolean, JVM_IsConstructorIx, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index)) 2608 ResourceMark rm(THREAD); 2609 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2610 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2611 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2612 return method->name() == vmSymbols::object_initializer_name(); 2613 JVM_END 2614 2615 2616 JVM_ENTRY_PROF(jboolean, JVM_IsVMGeneratedMethodIx, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index)) 2617 ResourceMark rm(THREAD); 2618 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2619 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2620 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2621 return method->is_overpass(); 2622 JVM_END 2623 2624 JVM_ENTRY_PROF(const char*, JVM_GetMethodIxNameUTF, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index)) 2625 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2626 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2627 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2628 return method->name()->as_utf8(); 2629 JVM_END 2630 2631 2632 JVM_ENTRY_PROF(const char*, JVM_GetMethodIxSignatureUTF, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index)) 2633 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2634 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2635 Method* method = InstanceKlass::cast(k)->methods()->at(method_index); 2636 return method->signature()->as_utf8(); 2637 JVM_END 2638 2639 /** 2640 * All of these JVM_GetCP-xxx methods are used by the old verifier to 2641 * read entries in the constant pool. Since the old verifier always 2642 * works on a copy of the code, it will not see any rewriting that 2643 * may possibly occur in the middle of verification. So it is important 2644 * that nothing it calls tries to use the cpCache instead of the raw 2645 * constant pool, so we must use cp->uncached_x methods when appropriate. 2646 */ 2647 JVM_ENTRY_PROF(const char*, JVM_GetCPFieldNameUTF, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2648 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2649 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2650 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2651 switch (cp->tag_at(cp_index).value()) { 2652 case JVM_CONSTANT_Fieldref: 2653 return cp->uncached_name_ref_at(cp_index)->as_utf8(); 2654 default: 2655 fatal("JVM_GetCPFieldNameUTF: illegal constant"); 2656 } 2657 ShouldNotReachHere(); 2658 return nullptr; 2659 JVM_END 2660 2661 2662 JVM_ENTRY_PROF(const char*, JVM_GetCPMethodNameUTF, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2663 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2664 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2665 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2666 switch (cp->tag_at(cp_index).value()) { 2667 case JVM_CONSTANT_InterfaceMethodref: 2668 case JVM_CONSTANT_Methodref: 2669 return cp->uncached_name_ref_at(cp_index)->as_utf8(); 2670 default: 2671 fatal("JVM_GetCPMethodNameUTF: illegal constant"); 2672 } 2673 ShouldNotReachHere(); 2674 return nullptr; 2675 JVM_END 2676 2677 2678 JVM_ENTRY_PROF(const char*, JVM_GetCPMethodSignatureUTF, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) 2679 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2680 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2681 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2682 switch (cp->tag_at(cp_index).value()) { 2683 case JVM_CONSTANT_InterfaceMethodref: 2684 case JVM_CONSTANT_Methodref: 2685 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); 2686 default: 2687 fatal("JVM_GetCPMethodSignatureUTF: illegal constant"); 2688 } 2689 ShouldNotReachHere(); 2690 return nullptr; 2691 JVM_END 2692 2693 2694 JVM_ENTRY_PROF(const char*, JVM_GetCPFieldSignatureUTF, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index)) 2695 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2696 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2697 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2698 switch (cp->tag_at(cp_index).value()) { 2699 case JVM_CONSTANT_Fieldref: 2700 return cp->uncached_signature_ref_at(cp_index)->as_utf8(); 2701 default: 2702 fatal("JVM_GetCPFieldSignatureUTF: illegal constant"); 2703 } 2704 ShouldNotReachHere(); 2705 return nullptr; 2706 JVM_END 2707 2708 2709 JVM_ENTRY_PROF(const char*, JVM_GetCPClassNameUTF, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2710 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2711 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2712 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2713 Symbol* classname = cp->klass_name_at(cp_index); 2714 return classname->as_utf8(); 2715 JVM_END 2716 2717 2718 JVM_ENTRY_PROF(const char*, JVM_GetCPFieldClassNameUTF, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2719 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2720 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2721 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2722 switch (cp->tag_at(cp_index).value()) { 2723 case JVM_CONSTANT_Fieldref: { 2724 int class_index = cp->uncached_klass_ref_index_at(cp_index); 2725 Symbol* classname = cp->klass_name_at(class_index); 2726 return classname->as_utf8(); 2727 } 2728 default: 2729 fatal("JVM_GetCPFieldClassNameUTF: illegal constant"); 2730 } 2731 ShouldNotReachHere(); 2732 return nullptr; 2733 JVM_END 2734 2735 2736 JVM_ENTRY_PROF(const char*, JVM_GetCPMethodClassNameUTF, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index)) 2737 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2738 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2739 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2740 switch (cp->tag_at(cp_index).value()) { 2741 case JVM_CONSTANT_Methodref: 2742 case JVM_CONSTANT_InterfaceMethodref: { 2743 int class_index = cp->uncached_klass_ref_index_at(cp_index); 2744 Symbol* classname = cp->klass_name_at(class_index); 2745 return classname->as_utf8(); 2746 } 2747 default: 2748 fatal("JVM_GetCPMethodClassNameUTF: illegal constant"); 2749 } 2750 ShouldNotReachHere(); 2751 return nullptr; 2752 JVM_END 2753 2754 2755 JVM_ENTRY_PROF(jint, JVM_GetCPFieldModifiers, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) 2756 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2757 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls)); 2758 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2759 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); 2760 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2761 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants(); 2762 switch (cp->tag_at(cp_index).value()) { 2763 case JVM_CONSTANT_Fieldref: { 2764 Symbol* name = cp->uncached_name_ref_at(cp_index); 2765 Symbol* signature = cp->uncached_signature_ref_at(cp_index); 2766 InstanceKlass* ik = InstanceKlass::cast(k_called); 2767 for (JavaFieldStream fs(ik); !fs.done(); fs.next()) { 2768 if (fs.name() == name && fs.signature() == signature) { 2769 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS; 2770 } 2771 } 2772 return -1; 2773 } 2774 default: 2775 fatal("JVM_GetCPFieldModifiers: illegal constant"); 2776 } 2777 ShouldNotReachHere(); 2778 return 0; 2779 JVM_END 2780 2781 2782 JVM_ENTRY_PROF(jint, JVM_GetCPMethodModifiers, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls)) 2783 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); 2784 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls)); 2785 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread); 2786 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread); 2787 ConstantPool* cp = InstanceKlass::cast(k)->constants(); 2788 switch (cp->tag_at(cp_index).value()) { 2789 case JVM_CONSTANT_Methodref: 2790 case JVM_CONSTANT_InterfaceMethodref: { 2791 Symbol* name = cp->uncached_name_ref_at(cp_index); 2792 Symbol* signature = cp->uncached_signature_ref_at(cp_index); 2793 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods(); 2794 int methods_count = methods->length(); 2795 for (int i = 0; i < methods_count; i++) { 2796 Method* method = methods->at(i); 2797 if (method->name() == name && method->signature() == signature) { 2798 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; 2799 } 2800 } 2801 return -1; 2802 } 2803 default: 2804 fatal("JVM_GetCPMethodModifiers: illegal constant"); 2805 } 2806 ShouldNotReachHere(); 2807 return 0; 2808 JVM_END 2809 2810 2811 // Misc ////////////////////////////////////////////////////////////////////////////////////////////// 2812 2813 JVM_LEAF_PROF(void, JVM_ReleaseUTF, JVM_ReleaseUTF(const char *utf)) 2814 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything 2815 JVM_END 2816 2817 2818 JVM_ENTRY_PROF(jboolean, JVM_IsSameClassPackage, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2)) 2819 oop class1_mirror = JNIHandles::resolve_non_null(class1); 2820 oop class2_mirror = JNIHandles::resolve_non_null(class2); 2821 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror); 2822 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror); 2823 return (jboolean) Reflection::is_same_class_package(klass1, klass2); 2824 JVM_END 2825 2826 // Printing support ////////////////////////////////////////////////// 2827 extern "C" { 2828 2829 ATTRIBUTE_PRINTF(3, 0) 2830 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) { 2831 // Reject count values that are negative signed values converted to 2832 // unsigned; see bug 4399518, 4417214 2833 if ((intptr_t)count <= 0) return -1; 2834 2835 int result = os::vsnprintf(str, count, fmt, args); 2836 if (result > 0 && (size_t)result >= count) { 2837 result = -1; 2838 } 2839 2840 return result; 2841 } 2842 2843 ATTRIBUTE_PRINTF(3, 4) 2844 int jio_snprintf(char *str, size_t count, const char *fmt, ...) { 2845 va_list args; 2846 int len; 2847 va_start(args, fmt); 2848 len = jio_vsnprintf(str, count, fmt, args); 2849 va_end(args); 2850 return len; 2851 } 2852 2853 ATTRIBUTE_PRINTF(2, 3) 2854 int jio_fprintf(FILE* f, const char *fmt, ...) { 2855 int len; 2856 va_list args; 2857 va_start(args, fmt); 2858 len = jio_vfprintf(f, fmt, args); 2859 va_end(args); 2860 return len; 2861 } 2862 2863 ATTRIBUTE_PRINTF(2, 0) 2864 int jio_vfprintf(FILE* f, const char *fmt, va_list args) { 2865 if (Arguments::vfprintf_hook() != nullptr) { 2866 return Arguments::vfprintf_hook()(f, fmt, args); 2867 } else { 2868 return vfprintf(f, fmt, args); 2869 } 2870 } 2871 2872 ATTRIBUTE_PRINTF(1, 2) 2873 JNIEXPORT int jio_printf(const char *fmt, ...) { 2874 int len; 2875 va_list args; 2876 va_start(args, fmt); 2877 len = jio_vfprintf(defaultStream::output_stream(), fmt, args); 2878 va_end(args); 2879 return len; 2880 } 2881 2882 // HotSpot specific jio method 2883 void jio_print(const char* s, size_t len) { 2884 // Try to make this function as atomic as possible. 2885 if (Arguments::vfprintf_hook() != nullptr) { 2886 jio_fprintf(defaultStream::output_stream(), "%.*s", (int)len, s); 2887 } else { 2888 // Make an unused local variable to avoid warning from gcc compiler. 2889 bool dummy = os::write(defaultStream::output_fd(), s, len); 2890 } 2891 } 2892 2893 } // Extern C 2894 2895 // java.lang.Thread ////////////////////////////////////////////////////////////////////////////// 2896 2897 // In most of the JVM thread support functions we need to access the 2898 // thread through a ThreadsListHandle to prevent it from exiting and 2899 // being reclaimed while we try to operate on it. The exceptions to this 2900 // rule are when operating on the current thread, or if the monitor of 2901 // the target java.lang.Thread is locked at the Java level - in both 2902 // cases the target cannot exit. 2903 2904 static void thread_entry(JavaThread* thread, TRAPS) { 2905 HandleMark hm(THREAD); 2906 Handle obj(THREAD, thread->threadObj()); 2907 JavaValue result(T_VOID); 2908 JavaCalls::call_virtual(&result, 2909 obj, 2910 vmClasses::Thread_klass(), 2911 vmSymbols::run_method_name(), 2912 vmSymbols::void_method_signature(), 2913 THREAD); 2914 } 2915 2916 2917 JVM_ENTRY_PROF(void, JVM_StartThread, JVM_StartThread(JNIEnv* env, jobject jthread)) 2918 #if INCLUDE_CDS 2919 if (CDSConfig::allow_only_single_java_thread()) { 2920 // During java -Xshare:dump, if we allow multiple Java threads to 2921 // execute in parallel, symbols and classes may be loaded in 2922 // random orders which will make the resulting CDS archive 2923 // non-deterministic. 2924 // 2925 // Lucikly, during java -Xshare:dump, it's important to run only 2926 // the code in the main Java thread (which is NOT started here) that 2927 // creates the module graph, etc. It's safe to not start the other 2928 // threads which are launched by class static initializers 2929 // (ReferenceHandler, FinalizerThread and CleanerImpl). 2930 if (log_is_enabled(Info, cds)) { 2931 ResourceMark rm; 2932 oop t = JNIHandles::resolve_non_null(jthread); 2933 log_info(cds)("JVM_StartThread() ignored: %s", t->klass()->external_name()); 2934 } 2935 return; 2936 } 2937 #endif 2938 JavaThread *native_thread = nullptr; 2939 2940 // We cannot hold the Threads_lock when we throw an exception, 2941 // due to rank ordering issues. Example: we might need to grab the 2942 // Heap_lock while we construct the exception. 2943 bool throw_illegal_thread_state = false; 2944 2945 // We must release the Threads_lock before we can post a jvmti event 2946 // in Thread::start. 2947 { 2948 // Ensure that the C++ Thread and OSThread structures aren't freed before 2949 // we operate. 2950 MutexLocker mu(Threads_lock); 2951 2952 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent 2953 // re-starting an already started thread, so we should usually find 2954 // that the JavaThread is null. However for a JNI attached thread 2955 // there is a small window between the Thread object being created 2956 // (with its JavaThread set) and the update to its threadStatus, so we 2957 // have to check for this 2958 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != nullptr) { 2959 throw_illegal_thread_state = true; 2960 } else { 2961 jlong size = 2962 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread)); 2963 // Allocate the C++ Thread structure and create the native thread. The 2964 // stack size retrieved from java is 64-bit signed, but the constructor takes 2965 // size_t (an unsigned type), which may be 32 or 64-bit depending on the platform. 2966 // - Avoid truncating on 32-bit platforms if size is greater than UINT_MAX. 2967 // - Avoid passing negative values which would result in really large stacks. 2968 NOT_LP64(if (size > SIZE_MAX) size = SIZE_MAX;) 2969 size_t sz = size > 0 ? (size_t) size : 0; 2970 native_thread = new JavaThread(&thread_entry, sz); 2971 2972 // At this point it may be possible that no osthread was created for the 2973 // JavaThread due to lack of memory. Check for this situation and throw 2974 // an exception if necessary. Eventually we may want to change this so 2975 // that we only grab the lock if the thread was created successfully - 2976 // then we can also do this check and throw the exception in the 2977 // JavaThread constructor. 2978 if (native_thread->osthread() != nullptr) { 2979 // Note: the current thread is not being used within "prepare". 2980 native_thread->prepare(jthread); 2981 } 2982 } 2983 } 2984 2985 if (throw_illegal_thread_state) { 2986 THROW(vmSymbols::java_lang_IllegalThreadStateException()); 2987 } 2988 2989 assert(native_thread != nullptr, "Starting null thread?"); 2990 2991 if (native_thread->osthread() == nullptr) { 2992 ResourceMark rm(thread); 2993 log_warning(os, thread)("Failed to start the native thread for java.lang.Thread \"%s\"", 2994 JavaThread::name_for(JNIHandles::resolve_non_null(jthread))); 2995 // No one should hold a reference to the 'native_thread'. 2996 native_thread->smr_delete(); 2997 if (JvmtiExport::should_post_resource_exhausted()) { 2998 JvmtiExport::post_resource_exhausted( 2999 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS, 3000 os::native_thread_creation_failed_msg()); 3001 } 3002 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(), 3003 os::native_thread_creation_failed_msg()); 3004 } 3005 3006 JFR_ONLY(Jfr::on_java_thread_start(thread, native_thread);) 3007 3008 Thread::start(native_thread); 3009 3010 JVM_END 3011 3012 3013 JVM_ENTRY_PROF(void, JVM_SetThreadPriority, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio)) 3014 ThreadsListHandle tlh(thread); 3015 oop java_thread = nullptr; 3016 JavaThread* receiver = nullptr; 3017 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread); 3018 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio); 3019 3020 if (is_alive) { 3021 // jthread refers to a live JavaThread. 3022 Thread::set_priority(receiver, (ThreadPriority)prio); 3023 } 3024 // Implied else: If the JavaThread hasn't started yet, then the 3025 // priority set in the java.lang.Thread object above will be pushed 3026 // down when it does start. 3027 JVM_END 3028 3029 3030 JVM_LEAF_PROF(void, JVM_Yield, JVM_Yield(JNIEnv *env, jclass threadClass)) 3031 if (os::dont_yield()) return; 3032 HOTSPOT_THREAD_YIELD(); 3033 os::naked_yield(); 3034 JVM_END 3035 3036 JVM_ENTRY_PROF(void, JVM_SleepNanos, JVM_SleepNanos(JNIEnv* env, jclass threadClass, jlong nanos)) 3037 if (nanos < 0) { 3038 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nanosecond timeout value out of range"); 3039 } 3040 3041 if (thread->is_interrupted(true) && !HAS_PENDING_EXCEPTION) { 3042 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); 3043 } 3044 3045 // Save current thread state and restore it at the end of this block. 3046 // And set new thread state to SLEEPING. 3047 JavaThreadSleepState jtss(thread); 3048 3049 HOTSPOT_THREAD_SLEEP_BEGIN(nanos / NANOSECS_PER_MILLISEC); 3050 3051 if (nanos == 0) { 3052 os::naked_yield(); 3053 } else { 3054 ThreadState old_state = thread->osthread()->get_state(); 3055 thread->osthread()->set_state(SLEEPING); 3056 if (!thread->sleep_nanos(nanos)) { // interrupted 3057 // An asynchronous exception could have been thrown on 3058 // us while we were sleeping. We do not overwrite those. 3059 if (!HAS_PENDING_EXCEPTION) { 3060 HOTSPOT_THREAD_SLEEP_END(1); 3061 3062 // TODO-FIXME: THROW_MSG returns which means we will not call set_state() 3063 // to properly restore the thread state. That's likely wrong. 3064 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted"); 3065 } 3066 } 3067 thread->osthread()->set_state(old_state); 3068 } 3069 HOTSPOT_THREAD_SLEEP_END(0); 3070 JVM_END 3071 3072 JVM_ENTRY_PROF(jobject, JVM_CurrentCarrierThread, JVM_CurrentCarrierThread(JNIEnv* env, jclass threadClass)) 3073 oop jthread = thread->threadObj(); 3074 assert(jthread != nullptr, "no current carrier thread!"); 3075 return JNIHandles::make_local(THREAD, jthread); 3076 JVM_END 3077 3078 JVM_ENTRY_PROF(jobject, JVM_CurrentThread, JVM_CurrentThread(JNIEnv* env, jclass threadClass)) 3079 oop theThread = thread->vthread(); 3080 assert(theThread != (oop)nullptr, "no current thread!"); 3081 return JNIHandles::make_local(THREAD, theThread); 3082 JVM_END 3083 3084 JVM_ENTRY_PROF(void, JVM_SetCurrentThread, JVM_SetCurrentThread(JNIEnv* env, jobject thisThread, 3085 jobject theThread)) 3086 oop threadObj = JNIHandles::resolve(theThread); 3087 thread->set_vthread(threadObj); 3088 JFR_ONLY(Jfr::on_set_current_thread(thread, threadObj);) 3089 JVM_END 3090 3091 JVM_ENTRY_PROF(jlong, JVM_GetNextThreadIdOffset, JVM_GetNextThreadIdOffset(JNIEnv* env, jclass threadClass)) 3092 return ThreadIdentifier::unsafe_offset(); 3093 JVM_END 3094 3095 JVM_ENTRY_PROF(void, JVM_Interrupt, JVM_Interrupt(JNIEnv* env, jobject jthread)) 3096 ThreadsListHandle tlh(thread); 3097 JavaThread* receiver = nullptr; 3098 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, nullptr); 3099 if (is_alive) { 3100 // jthread refers to a live JavaThread. 3101 receiver->interrupt(); 3102 } 3103 JVM_END 3104 3105 // Return true iff the current thread has locked the object passed in 3106 3107 JVM_ENTRY_PROF(jboolean, JVM_HoldsLock, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj)) 3108 if (obj == nullptr) { 3109 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); 3110 } 3111 Handle h_obj(THREAD, JNIHandles::resolve(obj)); 3112 return ObjectSynchronizer::current_thread_holds_lock(thread, h_obj); 3113 JVM_END 3114 3115 JVM_ENTRY_PROF(jobject, JVM_GetStackTrace, JVM_GetStackTrace(JNIEnv *env, jobject jthread)) 3116 oop trace = java_lang_Thread::async_get_stack_trace(JNIHandles::resolve(jthread), THREAD); 3117 return JNIHandles::make_local(THREAD, trace); 3118 JVM_END 3119 3120 3121 JVM_ENTRY_PROF(void, JVM_SetNativeThreadName, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name)) 3122 // We don't use a ThreadsListHandle here because the current thread 3123 // must be alive. 3124 oop java_thread = JNIHandles::resolve_non_null(jthread); 3125 JavaThread* thr = java_lang_Thread::thread(java_thread); 3126 if (thread == thr && !thr->has_attached_via_jni()) { 3127 // Thread naming is only supported for the current thread and 3128 // we don't set the name of an attached thread to avoid stepping 3129 // on other programs. 3130 ResourceMark rm(thread); 3131 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); 3132 os::set_native_thread_name(thread_name); 3133 } 3134 JVM_END 3135 3136 JVM_ENTRY_PROF(jobject, JVM_ScopedValueCache, JVM_ScopedValueCache(JNIEnv* env, jclass threadClass)) 3137 oop theCache = thread->scopedValueCache(); 3138 return JNIHandles::make_local(THREAD, theCache); 3139 JVM_END 3140 3141 JVM_ENTRY_PROF(void, JVM_SetScopedValueCache, JVM_SetScopedValueCache(JNIEnv* env, jclass threadClass, 3142 jobject theCache)) 3143 arrayOop objs = arrayOop(JNIHandles::resolve(theCache)); 3144 thread->set_scopedValueCache(objs); 3145 JVM_END 3146 3147 // java.lang.SecurityManager /////////////////////////////////////////////////////////////////////// 3148 3149 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassContext, JVM_GetClassContext(JNIEnv *env)) 3150 ResourceMark rm(THREAD); 3151 JvmtiVMObjectAllocEventCollector oam; 3152 vframeStream vfst(thread); 3153 3154 if (vmClasses::reflect_CallerSensitive_klass() != nullptr) { 3155 // This must only be called from SecurityManager.getClassContext 3156 Method* m = vfst.method(); 3157 if (!(m->method_holder() == vmClasses::SecurityManager_klass() && 3158 m->name() == vmSymbols::getClassContext_name() && 3159 m->signature() == vmSymbols::void_class_array_signature())) { 3160 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext"); 3161 } 3162 } 3163 3164 // Collect method holders 3165 GrowableArray<Klass*>* klass_array = new GrowableArray<Klass*>(); 3166 for (; !vfst.at_end(); vfst.security_next()) { 3167 Method* m = vfst.method(); 3168 // Native frames are not returned 3169 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) { 3170 Klass* holder = m->method_holder(); 3171 assert(holder->is_klass(), "just checking"); 3172 klass_array->append(holder); 3173 } 3174 } 3175 3176 // Create result array of type [Ljava/lang/Class; 3177 objArrayOop result = oopFactory::new_objArray(vmClasses::Class_klass(), klass_array->length(), CHECK_NULL); 3178 // Fill in mirrors corresponding to method holders 3179 for (int i = 0; i < klass_array->length(); i++) { 3180 result->obj_at_put(i, klass_array->at(i)->java_mirror()); 3181 } 3182 3183 return (jobjectArray) JNIHandles::make_local(THREAD, result); 3184 JVM_END 3185 3186 3187 // java.lang.Package //////////////////////////////////////////////////////////////// 3188 3189 3190 JVM_ENTRY_PROF(jstring, JVM_GetSystemPackage, JVM_GetSystemPackage(JNIEnv *env, jstring name)) 3191 ResourceMark rm(THREAD); 3192 JvmtiVMObjectAllocEventCollector oam; 3193 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); 3194 oop result = ClassLoader::get_system_package(str, CHECK_NULL); 3195 return (jstring) JNIHandles::make_local(THREAD, result); 3196 JVM_END 3197 3198 3199 JVM_ENTRY_PROF(jobjectArray, JVM_GetSystemPackages, JVM_GetSystemPackages(JNIEnv *env)) 3200 JvmtiVMObjectAllocEventCollector oam; 3201 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL); 3202 return (jobjectArray) JNIHandles::make_local(THREAD, result); 3203 JVM_END 3204 3205 3206 // java.lang.ref.Reference /////////////////////////////////////////////////////////////// 3207 3208 3209 JVM_ENTRY_PROF(jobject, JVM_GetAndClearReferencePendingList, JVM_GetAndClearReferencePendingList(JNIEnv* env)) 3210 MonitorLocker ml(Heap_lock); 3211 oop ref = Universe::reference_pending_list(); 3212 if (ref != nullptr) { 3213 Universe::clear_reference_pending_list(); 3214 } 3215 return JNIHandles::make_local(THREAD, ref); 3216 JVM_END 3217 3218 JVM_ENTRY_PROF(jboolean, JVM_HasReferencePendingList, JVM_HasReferencePendingList(JNIEnv* env)) 3219 MonitorLocker ml(Heap_lock); 3220 return Universe::has_reference_pending_list(); 3221 JVM_END 3222 3223 JVM_ENTRY_PROF(void, JVM_WaitForReferencePendingList, JVM_WaitForReferencePendingList(JNIEnv* env)) 3224 MonitorLocker ml(Heap_lock); 3225 while (!Universe::has_reference_pending_list()) { 3226 ml.wait(); 3227 } 3228 JVM_END 3229 3230 JVM_ENTRY_PROF(jboolean, JVM_ReferenceRefersTo, JVM_ReferenceRefersTo(JNIEnv* env, jobject ref, jobject o)) 3231 oop ref_oop = JNIHandles::resolve_non_null(ref); 3232 // PhantomReference has it's own implementation of refersTo(). 3233 // See: JVM_PhantomReferenceRefersTo 3234 assert(!java_lang_ref_Reference::is_phantom(ref_oop), "precondition"); 3235 oop referent = java_lang_ref_Reference::weak_referent_no_keepalive(ref_oop); 3236 return referent == JNIHandles::resolve(o); 3237 JVM_END 3238 3239 JVM_ENTRY_PROF(void, JVM_ReferenceClear, JVM_ReferenceClear(JNIEnv* env, jobject ref)) 3240 oop ref_oop = JNIHandles::resolve_non_null(ref); 3241 // FinalReference has it's own implementation of clear(). 3242 assert(!java_lang_ref_Reference::is_final(ref_oop), "precondition"); 3243 if (java_lang_ref_Reference::unknown_referent_no_keepalive(ref_oop) == nullptr) { 3244 // If the referent has already been cleared then done. 3245 // However, if the referent is dead but has not yet been cleared by 3246 // concurrent reference processing, it should NOT be cleared here. 3247 // Instead, clearing should be left to the GC. Clearing it here could 3248 // detectably lose an expected notification, which is impossible with 3249 // STW reference processing. The clearing in enqueue() doesn't have 3250 // this problem, since the enqueue covers the notification, but it's not 3251 // worth the effort to handle that case specially. 3252 return; 3253 } 3254 java_lang_ref_Reference::clear_referent(ref_oop); 3255 JVM_END 3256 3257 3258 // java.lang.ref.PhantomReference ////////////////////////////////////////////////// 3259 3260 3261 JVM_ENTRY_PROF(jboolean, JVM_PhantomReferenceRefersTo, JVM_PhantomReferenceRefersTo(JNIEnv* env, jobject ref, jobject o)) 3262 oop ref_oop = JNIHandles::resolve_non_null(ref); 3263 oop referent = java_lang_ref_Reference::phantom_referent_no_keepalive(ref_oop); 3264 return referent == JNIHandles::resolve(o); 3265 JVM_END 3266 3267 3268 // ObjectInputStream /////////////////////////////////////////////////////////////// 3269 3270 // Return the first user-defined class loader up the execution stack, or null 3271 // if only code from the bootstrap or platform class loader is on the stack. 3272 3273 JVM_ENTRY_PROF(jobject, JVM_LatestUserDefinedLoader, JVM_LatestUserDefinedLoader(JNIEnv *env)) 3274 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) { 3275 InstanceKlass* ik = vfst.method()->method_holder(); 3276 oop loader = ik->class_loader(); 3277 if (loader != nullptr && !SystemDictionary::is_platform_class_loader(loader)) { 3278 // Skip reflection related frames 3279 if (!ik->is_subclass_of(vmClasses::reflect_SerializationConstructorAccessorImpl_klass())) { 3280 return JNIHandles::make_local(THREAD, loader); 3281 } 3282 } 3283 } 3284 return nullptr; 3285 JVM_END 3286 3287 3288 // Array /////////////////////////////////////////////////////////////////////////////////////////// 3289 3290 3291 // resolve array handle and check arguments 3292 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) { 3293 if (arr == nullptr) { 3294 THROW_NULL(vmSymbols::java_lang_NullPointerException()); 3295 } 3296 oop a = JNIHandles::resolve_non_null(arr); 3297 if (!a->is_array()) { 3298 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array"); 3299 } else if (type_array_only && !a->is_typeArray()) { 3300 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type"); 3301 } 3302 return arrayOop(a); 3303 } 3304 3305 3306 JVM_ENTRY_PROF(jint, JVM_GetArrayLength, JVM_GetArrayLength(JNIEnv *env, jobject arr)) 3307 arrayOop a = check_array(env, arr, false, CHECK_0); 3308 return a->length(); 3309 JVM_END 3310 3311 3312 JVM_ENTRY_PROF(jobject, JVM_GetArrayElement, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index)) 3313 JvmtiVMObjectAllocEventCollector oam; 3314 arrayOop a = check_array(env, arr, false, CHECK_NULL); 3315 jvalue value; 3316 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL); 3317 oop box = Reflection::box(&value, type, CHECK_NULL); 3318 return JNIHandles::make_local(THREAD, box); 3319 JVM_END 3320 3321 3322 JVM_ENTRY_PROF(jvalue, JVM_GetPrimitiveArrayElement, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode)) 3323 jvalue value; 3324 value.i = 0; // to initialize value before getting used in CHECK 3325 arrayOop a = check_array(env, arr, true, CHECK_(value)); 3326 assert(a->is_typeArray(), "just checking"); 3327 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value)); 3328 BasicType wide_type = (BasicType) wCode; 3329 if (type != wide_type) { 3330 Reflection::widen(&value, type, wide_type, CHECK_(value)); 3331 } 3332 return value; 3333 JVM_END 3334 3335 3336 JVM_ENTRY_PROF(void, JVM_SetArrayElement, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val)) 3337 arrayOop a = check_array(env, arr, false, CHECK); 3338 oop box = JNIHandles::resolve(val); 3339 jvalue value; 3340 value.i = 0; // to initialize value before getting used in CHECK 3341 BasicType value_type; 3342 if (a->is_objArray()) { 3343 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array 3344 value_type = Reflection::unbox_for_regular_object(box, &value); 3345 } else { 3346 value_type = Reflection::unbox_for_primitive(box, &value, CHECK); 3347 } 3348 Reflection::array_set(&value, a, index, value_type, CHECK); 3349 JVM_END 3350 3351 3352 JVM_ENTRY_PROF(void, JVM_SetPrimitiveArrayElement, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode)) 3353 arrayOop a = check_array(env, arr, true, CHECK); 3354 assert(a->is_typeArray(), "just checking"); 3355 BasicType value_type = (BasicType) vCode; 3356 Reflection::array_set(&v, a, index, value_type, CHECK); 3357 JVM_END 3358 3359 3360 JVM_ENTRY_PROF(jobject, JVM_NewArray, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length)) 3361 JvmtiVMObjectAllocEventCollector oam; 3362 oop element_mirror = JNIHandles::resolve(eltClass); 3363 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL); 3364 return JNIHandles::make_local(THREAD, result); 3365 JVM_END 3366 3367 3368 JVM_ENTRY_PROF(jobject, JVM_NewMultiArray, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim)) 3369 JvmtiVMObjectAllocEventCollector oam; 3370 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL); 3371 oop element_mirror = JNIHandles::resolve(eltClass); 3372 assert(dim_array->is_typeArray(), "just checking"); 3373 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL); 3374 return JNIHandles::make_local(THREAD, result); 3375 JVM_END 3376 3377 3378 // Library support /////////////////////////////////////////////////////////////////////////// 3379 3380 JVM_LEAF_PROF(void*, JVM_LoadZipLibrary, JVM_LoadZipLibrary()) 3381 return ZipLibrary::handle(); 3382 JVM_END 3383 3384 JVM_ENTRY_NO_ENV_PROF(void*, JVM_LoadLibrary, JVM_LoadLibrary(const char* name, jboolean throwException)) 3385 //%note jvm_ct 3386 char ebuf[1024]; 3387 void *load_result; 3388 { 3389 ThreadToNativeFromVM ttnfvm(thread); 3390 load_result = os::dll_load(name, ebuf, sizeof ebuf); 3391 } 3392 if (load_result == nullptr) { 3393 if (throwException) { 3394 char msg[1024]; 3395 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf); 3396 // Since 'ebuf' may contain a string encoded using 3397 // platform encoding scheme, we need to pass 3398 // Exceptions::unsafe_to_utf8 to the new_exception method 3399 // as the last argument. See bug 6367357. 3400 Handle h_exception = 3401 Exceptions::new_exception(thread, 3402 vmSymbols::java_lang_UnsatisfiedLinkError(), 3403 msg, Exceptions::unsafe_to_utf8); 3404 3405 THROW_HANDLE_NULL(h_exception); 3406 } else { 3407 log_info(library)("Failed to load library %s", name); 3408 return load_result; 3409 } 3410 } 3411 log_info(library)("Loaded library %s, handle " INTPTR_FORMAT, name, p2i(load_result)); 3412 return load_result; 3413 JVM_END 3414 3415 3416 JVM_LEAF_PROF(void, JVM_UnloadLibrary, JVM_UnloadLibrary(void* handle)) 3417 os::dll_unload(handle); 3418 log_info(library)("Unloaded library with handle " INTPTR_FORMAT, p2i(handle)); 3419 JVM_END 3420 3421 3422 JVM_LEAF_PROF(void*, JVM_FindLibraryEntry, JVM_FindLibraryEntry(void* handle, const char* name)) 3423 void* find_result = os::dll_lookup(handle, name); 3424 log_info(library)("%s %s in library with handle " INTPTR_FORMAT, 3425 find_result != nullptr ? "Found" : "Failed to find", 3426 name, p2i(handle)); 3427 return find_result; 3428 JVM_END 3429 3430 3431 // JNI version /////////////////////////////////////////////////////////////////////////////// 3432 3433 JVM_LEAF_PROF(jboolean, JVM_IsSupportedJNIVersion, JVM_IsSupportedJNIVersion(jint version)) 3434 return Threads::is_supported_jni_version_including_1_1(version); 3435 JVM_END 3436 3437 3438 JVM_LEAF_PROF(jboolean, JVM_IsPreviewEnabled, JVM_IsPreviewEnabled(void)) 3439 return Arguments::enable_preview() ? JNI_TRUE : JNI_FALSE; 3440 JVM_END 3441 3442 JVM_LEAF_PROF(jboolean, JVM_IsContinuationsSupported, JVM_IsContinuationsSupported(void)) 3443 return VMContinuations ? JNI_TRUE : JNI_FALSE; 3444 JVM_END 3445 3446 JVM_LEAF_PROF(jboolean, JVM_IsForeignLinkerSupported, JVM_IsForeignLinkerSupported(void)) 3447 return ForeignGlobals::is_foreign_linker_supported() ? JNI_TRUE : JNI_FALSE; 3448 JVM_END 3449 3450 JVM_ENTRY_NO_ENV(jboolean, JVM_IsStaticallyLinked(void)) 3451 return is_vm_statically_linked() ? JNI_TRUE : JNI_FALSE; 3452 JVM_END 3453 3454 // String support /////////////////////////////////////////////////////////////////////////// 3455 3456 JVM_ENTRY_PROF(jstring, JVM_InternString, JVM_InternString(JNIEnv *env, jstring str)) 3457 JvmtiVMObjectAllocEventCollector oam; 3458 if (str == nullptr) return nullptr; 3459 oop string = JNIHandles::resolve_non_null(str); 3460 oop result = StringTable::intern(string, CHECK_NULL); 3461 return (jstring) JNIHandles::make_local(THREAD, result); 3462 JVM_END 3463 3464 3465 // VM Raw monitor support ////////////////////////////////////////////////////////////////////// 3466 3467 // VM Raw monitors (not to be confused with JvmtiRawMonitors) are a simple mutual exclusion 3468 // lock (not actually monitors: no wait/notify) that is exported by the VM for use by JDK 3469 // library code. They may be used by JavaThreads and non-JavaThreads and do not participate 3470 // in the safepoint protocol, thread suspension, thread interruption, or anything of that 3471 // nature. JavaThreads will be "in native" when using this API from JDK code. 3472 3473 3474 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) { 3475 VM_Exit::block_if_vm_exited(); 3476 return new PlatformMutex(); 3477 } 3478 3479 3480 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) { 3481 VM_Exit::block_if_vm_exited(); 3482 delete ((PlatformMutex*) mon); 3483 } 3484 3485 3486 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) { 3487 VM_Exit::block_if_vm_exited(); 3488 ((PlatformMutex*) mon)->lock(); 3489 return 0; 3490 } 3491 3492 3493 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) { 3494 VM_Exit::block_if_vm_exited(); 3495 ((PlatformMutex*) mon)->unlock(); 3496 } 3497 3498 3499 // Shared JNI/JVM entry points ////////////////////////////////////////////////////////////// 3500 3501 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, 3502 Handle loader, Handle protection_domain, 3503 jboolean throwError, TRAPS) { 3504 // Security Note: 3505 // The Java level wrapper will perform the necessary security check allowing 3506 // us to pass the null as the initiating class loader. The VM is responsible for 3507 // the checkPackageAccess relative to the initiating class loader via the 3508 // protection_domain. The protection_domain is passed as null by the java code 3509 // if there is no security manager in 3-arg Class.forName(). 3510 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL); 3511 3512 // Check if we should initialize the class 3513 if (init && klass->is_instance_klass()) { 3514 klass->initialize(CHECK_NULL); 3515 } 3516 return (jclass) JNIHandles::make_local(THREAD, klass->java_mirror()); 3517 } 3518 3519 3520 // Method /////////////////////////////////////////////////////////////////////////////////////////// 3521 3522 JVM_ENTRY_PROF(jobject, JVM_InvokeMethod, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0)) 3523 Handle method_handle; 3524 if (thread->stack_overflow_state()->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) { 3525 method_handle = Handle(THREAD, JNIHandles::resolve(method)); 3526 Handle receiver(THREAD, JNIHandles::resolve(obj)); 3527 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); 3528 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL); 3529 jobject res = JNIHandles::make_local(THREAD, result); 3530 if (JvmtiExport::should_post_vm_object_alloc()) { 3531 oop ret_type = java_lang_reflect_Method::return_type(method_handle()); 3532 assert(ret_type != nullptr, "sanity check: ret_type oop must not be null!"); 3533 if (java_lang_Class::is_primitive(ret_type)) { 3534 // Only for primitive type vm allocates memory for java object. 3535 // See box() method. 3536 JvmtiExport::post_vm_object_alloc(thread, result); 3537 } 3538 } 3539 return res; 3540 } else { 3541 THROW_NULL(vmSymbols::java_lang_StackOverflowError()); 3542 } 3543 JVM_END 3544 3545 3546 JVM_ENTRY_PROF(jobject, JVM_NewInstanceFromConstructor, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0)) 3547 oop constructor_mirror = JNIHandles::resolve(c); 3548 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0))); 3549 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL); 3550 jobject res = JNIHandles::make_local(THREAD, result); 3551 if (JvmtiExport::should_post_vm_object_alloc()) { 3552 JvmtiExport::post_vm_object_alloc(thread, result); 3553 } 3554 return res; 3555 JVM_END 3556 3557 JVM_ENTRY_PROF(void, JVM_InitializeFromArchive, JVM_InitializeFromArchive(JNIEnv* env, jclass cls)) 3558 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls)); 3559 assert(k->is_klass(), "just checking"); 3560 HeapShared::initialize_from_archived_subgraph(THREAD, k); 3561 JVM_END 3562 3563 JVM_ENTRY_PROF(void, JVM_RegisterLambdaProxyClassForArchiving, JVM_RegisterLambdaProxyClassForArchiving(JNIEnv* env, 3564 jclass caller, 3565 jstring interfaceMethodName, 3566 jobject factoryType, 3567 jobject interfaceMethodType, 3568 jobject implementationMember, 3569 jobject dynamicMethodType, 3570 jclass lambdaProxyClass)) 3571 #if INCLUDE_CDS 3572 if (!CDSConfig::is_dumping_archive()) { 3573 return; 3574 } 3575 3576 Klass* caller_k = java_lang_Class::as_Klass(JNIHandles::resolve(caller)); 3577 InstanceKlass* caller_ik = InstanceKlass::cast(caller_k); 3578 if (caller_ik->is_hidden()) { 3579 // Hidden classes not of type lambda proxy classes are currently not being archived. 3580 // If the caller_ik is of one of the above types, the corresponding lambda proxy class won't be 3581 // registered for archiving. 3582 return; 3583 } 3584 Klass* lambda_k = java_lang_Class::as_Klass(JNIHandles::resolve(lambdaProxyClass)); 3585 InstanceKlass* lambda_ik = InstanceKlass::cast(lambda_k); 3586 assert(lambda_ik->is_hidden(), "must be a hidden class"); 3587 assert(!lambda_ik->is_non_strong_hidden(), "expected a strong hidden class"); 3588 3589 Symbol* interface_method_name = nullptr; 3590 if (interfaceMethodName != nullptr) { 3591 interface_method_name = java_lang_String::as_symbol(JNIHandles::resolve_non_null(interfaceMethodName)); 3592 } 3593 Handle factory_type_oop(THREAD, JNIHandles::resolve_non_null(factoryType)); 3594 Symbol* factory_type = java_lang_invoke_MethodType::as_signature(factory_type_oop(), true); 3595 3596 Handle interface_method_type_oop(THREAD, JNIHandles::resolve_non_null(interfaceMethodType)); 3597 Symbol* interface_method_type = java_lang_invoke_MethodType::as_signature(interface_method_type_oop(), true); 3598 3599 Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember)); 3600 assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be"); 3601 Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop()); 3602 3603 Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType)); 3604 Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true); 3605 3606 SystemDictionaryShared::add_lambda_proxy_class(caller_ik, lambda_ik, interface_method_name, factory_type, 3607 interface_method_type, m, dynamic_method_type, THREAD); 3608 #endif // INCLUDE_CDS 3609 JVM_END 3610 3611 JVM_ENTRY_PROF(jclass, JVM_LookupLambdaProxyClassFromArchive, JVM_LookupLambdaProxyClassFromArchive(JNIEnv* env, 3612 jclass caller, 3613 jstring interfaceMethodName, 3614 jobject factoryType, 3615 jobject interfaceMethodType, 3616 jobject implementationMember, 3617 jobject dynamicMethodType)) 3618 #if INCLUDE_CDS 3619 3620 if (interfaceMethodName == nullptr || factoryType == nullptr || interfaceMethodType == nullptr || 3621 implementationMember == nullptr || dynamicMethodType == nullptr) { 3622 THROW_(vmSymbols::java_lang_NullPointerException(), nullptr); 3623 } 3624 3625 Klass* caller_k = java_lang_Class::as_Klass(JNIHandles::resolve(caller)); 3626 InstanceKlass* caller_ik = InstanceKlass::cast(caller_k); 3627 if (!caller_ik->is_shared()) { 3628 // there won't be a shared lambda class if the caller_ik is not in the shared archive. 3629 return nullptr; 3630 } 3631 3632 Symbol* interface_method_name = java_lang_String::as_symbol(JNIHandles::resolve_non_null(interfaceMethodName)); 3633 Handle factory_type_oop(THREAD, JNIHandles::resolve_non_null(factoryType)); 3634 Symbol* factory_type = java_lang_invoke_MethodType::as_signature(factory_type_oop(), true); 3635 3636 Handle interface_method_type_oop(THREAD, JNIHandles::resolve_non_null(interfaceMethodType)); 3637 Symbol* interface_method_type = java_lang_invoke_MethodType::as_signature(interface_method_type_oop(), true); 3638 3639 Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember)); 3640 assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be"); 3641 Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop()); 3642 3643 Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType)); 3644 Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true); 3645 3646 InstanceKlass* lambda_ik = SystemDictionaryShared::get_shared_lambda_proxy_class(caller_ik, interface_method_name, factory_type, 3647 interface_method_type, m, dynamic_method_type); 3648 jclass jcls = nullptr; 3649 if (lambda_ik != nullptr) { 3650 InstanceKlass* loaded_lambda = SystemDictionaryShared::prepare_shared_lambda_proxy_class(lambda_ik, caller_ik, THREAD); 3651 jcls = loaded_lambda == nullptr ? nullptr : (jclass) JNIHandles::make_local(THREAD, loaded_lambda->java_mirror()); 3652 } 3653 return jcls; 3654 #else 3655 return nullptr; 3656 #endif // INCLUDE_CDS 3657 JVM_END 3658 3659 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_GetRandomSeedForDumping, JVM_GetRandomSeedForDumping()) 3660 if (CDSConfig::is_dumping_static_archive()) { 3661 // We do this so that the default CDS archive can be deterministic. 3662 const char* release = VM_Version::vm_release(); 3663 const char* dbg_level = VM_Version::jdk_debug_level(); 3664 const char* version = VM_Version::internal_vm_info_string(); 3665 jlong seed = (jlong)(java_lang_String::hash_code((const jbyte*)release, (int)strlen(release)) ^ 3666 java_lang_String::hash_code((const jbyte*)dbg_level, (int)strlen(dbg_level)) ^ 3667 java_lang_String::hash_code((const jbyte*)version, (int)strlen(version))); 3668 seed += (jlong)VM_Version::vm_major_version(); 3669 seed += (jlong)VM_Version::vm_minor_version(); 3670 seed += (jlong)VM_Version::vm_security_version(); 3671 seed += (jlong)VM_Version::vm_patch_version(); 3672 if (seed == 0) { // don't let this ever be zero. 3673 seed = 0x87654321; 3674 } 3675 log_debug(cds)("JVM_GetRandomSeedForDumping() = " JLONG_FORMAT, seed); 3676 return seed; 3677 } else { 3678 return 0; 3679 } 3680 JVM_END 3681 3682 JVM_ENTRY_NO_ENV_PROF(jint, JVM_GetCDSConfigStatus, JVM_GetCDSConfigStatus()) 3683 return CDSConfig::get_status(); 3684 JVM_END 3685 3686 JVM_ENTRY_PROF(void, JVM_LogLambdaFormInvoker, JVM_LogLambdaFormInvoker(JNIEnv *env, jstring line)) 3687 #if INCLUDE_CDS 3688 assert(CDSConfig::is_logging_lambda_form_invokers(), "sanity"); 3689 if (line != nullptr) { 3690 ResourceMark rm(THREAD); 3691 Handle h_line (THREAD, JNIHandles::resolve_non_null(line)); 3692 char* c_line = java_lang_String::as_utf8_string(h_line()); 3693 if (CDSConfig::is_dumping_dynamic_archive() || CDSConfig::is_dumping_preimage_static_archive()) { 3694 // Note: LambdaFormInvokers::append take same format which is not 3695 // same as below the print format. The line does not include LAMBDA_FORM_TAG. 3696 LambdaFormInvokers::append(os::strdup((const char*)c_line, mtInternal)); 3697 } 3698 if (ClassListWriter::is_enabled()) { 3699 ClassListWriter w; 3700 w.stream()->print_cr("%s %s", ClassListParser::lambda_form_tag(), c_line); 3701 } 3702 } 3703 #endif // INCLUDE_CDS 3704 JVM_END 3705 3706 JVM_ENTRY_PROF(void, JVM_LogDynamicProxy, JVM_LogDynamicProxy(JNIEnv *env, jobject loader, jstring proxy_name, jobjectArray interfaces, jint access_flags)) 3707 #if INCLUDE_CDS 3708 assert(CDSConfig::is_logging_dynamic_proxies(), "sanity"); 3709 3710 ResourceMark rm(THREAD); 3711 oop proxy_name_oop = JNIHandles::resolve_non_null(proxy_name); 3712 char* proxy_name_str = java_lang_String::as_utf8_string(proxy_name_oop); 3713 oop loader_oop = JNIHandles::resolve(loader); 3714 objArrayOop interfaces_oop = objArrayOop(JNIHandles::resolve_non_null(interfaces)); 3715 3716 AOTConstantPoolResolver::trace_dynamic_proxy_class(loader_oop, proxy_name_str, interfaces_oop, access_flags); 3717 #endif // INCLUDE_CDS 3718 JVM_END 3719 3720 JVM_ENTRY_PROF(void, JVM_DumpClassListToFile, JVM_DumpClassListToFile(JNIEnv *env, jstring listFileName)) 3721 #if INCLUDE_CDS 3722 ResourceMark rm(THREAD); 3723 Handle file_handle(THREAD, JNIHandles::resolve_non_null(listFileName)); 3724 char* file_name = java_lang_String::as_utf8_string(file_handle()); 3725 MetaspaceShared::dump_loaded_classes(file_name, THREAD); 3726 #endif // INCLUDE_CDS 3727 JVM_END 3728 3729 JVM_ENTRY_PROF(void, JVM_DumpDynamicArchive, JVM_DumpDynamicArchive(JNIEnv *env, jstring archiveName)) 3730 #if INCLUDE_CDS 3731 ResourceMark rm(THREAD); 3732 Handle file_handle(THREAD, JNIHandles::resolve_non_null(archiveName)); 3733 char* archive_name = java_lang_String::as_utf8_string(file_handle()); 3734 DynamicArchive::dump_for_jcmd(archive_name, CHECK); 3735 #endif // INCLUDE_CDS 3736 JVM_END 3737 3738 // Returns an array of all live Thread objects (VM internal JavaThreads, 3739 // jvmti agent threads, and JNI attaching threads are skipped) 3740 // See CR 6404306 regarding JNI attaching threads 3741 JVM_ENTRY_PROF(jobjectArray, JVM_GetAllThreads, JVM_GetAllThreads(JNIEnv *env, jclass dummy)) 3742 ResourceMark rm(THREAD); 3743 ThreadsListEnumerator tle(THREAD, false, false); 3744 JvmtiVMObjectAllocEventCollector oam; 3745 3746 int num_threads = tle.num_threads(); 3747 objArrayOop r = oopFactory::new_objArray(vmClasses::Thread_klass(), num_threads, CHECK_NULL); 3748 objArrayHandle threads_ah(THREAD, r); 3749 3750 for (int i = 0; i < num_threads; i++) { 3751 Handle h = tle.get_threadObj(i); 3752 threads_ah->obj_at_put(i, h()); 3753 } 3754 3755 return (jobjectArray) JNIHandles::make_local(THREAD, threads_ah()); 3756 JVM_END 3757 3758 3759 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods 3760 // Return StackTraceElement[][], each element is the stack trace of a thread in 3761 // the corresponding entry in the given threads array 3762 JVM_ENTRY_PROF(jobjectArray, JVM_DumpThreads, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads)) 3763 JvmtiVMObjectAllocEventCollector oam; 3764 3765 // Check if threads is null 3766 if (threads == nullptr) { 3767 THROW_NULL(vmSymbols::java_lang_NullPointerException()); 3768 } 3769 3770 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads)); 3771 objArrayHandle ah(THREAD, a); 3772 int num_threads = ah->length(); 3773 // check if threads is non-empty array 3774 if (num_threads == 0) { 3775 THROW_NULL(vmSymbols::java_lang_IllegalArgumentException()); 3776 } 3777 3778 // check if threads is not an array of objects of Thread class 3779 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass(); 3780 if (k != vmClasses::Thread_klass()) { 3781 THROW_NULL(vmSymbols::java_lang_IllegalArgumentException()); 3782 } 3783 3784 ResourceMark rm(THREAD); 3785 3786 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); 3787 for (int i = 0; i < num_threads; i++) { 3788 oop thread_obj = ah->obj_at(i); 3789 instanceHandle h(THREAD, (instanceOop) thread_obj); 3790 thread_handle_array->append(h); 3791 } 3792 3793 // The JavaThread references in thread_handle_array are validated 3794 // in VM_ThreadDump::doit(). 3795 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL); 3796 return (jobjectArray)JNIHandles::make_local(THREAD, stacktraces()); 3797 3798 JVM_END 3799 3800 // JVM monitoring and management support 3801 JVM_LEAF_PROF(void*, JVM_GetManagement, JVM_GetManagement(jint version)) 3802 return Management::get_jmm_interface(version); 3803 JVM_END 3804 3805 // com.sun.tools.attach.VirtualMachine agent properties support 3806 // 3807 // Initialize the agent properties with the properties maintained in the VM 3808 JVM_ENTRY_PROF(jobject, JVM_InitAgentProperties, JVM_InitAgentProperties(JNIEnv *env, jobject properties)) 3809 ResourceMark rm; 3810 3811 Handle props(THREAD, JNIHandles::resolve_non_null(properties)); 3812 3813 PUTPROP(props, "sun.java.command", Arguments::java_command()); 3814 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags()); 3815 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args()); 3816 return properties; 3817 JVM_END 3818 3819 JVM_ENTRY_PROF(jobjectArray, JVM_GetEnclosingMethodInfo, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass)) 3820 { 3821 JvmtiVMObjectAllocEventCollector oam; 3822 3823 if (ofClass == nullptr) { 3824 return nullptr; 3825 } 3826 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass)); 3827 // Special handling for primitive objects 3828 if (java_lang_Class::is_primitive(mirror())) { 3829 return nullptr; 3830 } 3831 Klass* k = java_lang_Class::as_Klass(mirror()); 3832 if (!k->is_instance_klass()) { 3833 return nullptr; 3834 } 3835 InstanceKlass* ik = InstanceKlass::cast(k); 3836 int encl_method_class_idx = ik->enclosing_method_class_index(); 3837 if (encl_method_class_idx == 0) { 3838 return nullptr; 3839 } 3840 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::Object_klass(), 3, CHECK_NULL); 3841 objArrayHandle dest(THREAD, dest_o); 3842 Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL); 3843 dest->obj_at_put(0, enc_k->java_mirror()); 3844 int encl_method_method_idx = ik->enclosing_method_method_index(); 3845 if (encl_method_method_idx != 0) { 3846 Symbol* sym = ik->constants()->symbol_at( 3847 extract_low_short_from_int( 3848 ik->constants()->name_and_type_at(encl_method_method_idx))); 3849 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 3850 dest->obj_at_put(1, str()); 3851 sym = ik->constants()->symbol_at( 3852 extract_high_short_from_int( 3853 ik->constants()->name_and_type_at(encl_method_method_idx))); 3854 str = java_lang_String::create_from_symbol(sym, CHECK_NULL); 3855 dest->obj_at_put(2, str()); 3856 } 3857 return (jobjectArray) JNIHandles::make_local(THREAD, dest()); 3858 } 3859 JVM_END 3860 3861 // Returns an array of java.lang.String objects containing the input arguments to the VM. 3862 JVM_ENTRY_PROF(jobjectArray, JVM_GetVmArguments, JVM_GetVmArguments(JNIEnv *env)) 3863 ResourceMark rm(THREAD); 3864 3865 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) { 3866 return nullptr; 3867 } 3868 3869 char** vm_flags = Arguments::jvm_flags_array(); 3870 char** vm_args = Arguments::jvm_args_array(); 3871 int num_flags = Arguments::num_jvm_flags(); 3872 int num_args = Arguments::num_jvm_args(); 3873 3874 InstanceKlass* ik = vmClasses::String_klass(); 3875 objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL); 3876 objArrayHandle result_h(THREAD, r); 3877 3878 int index = 0; 3879 for (int j = 0; j < num_flags; j++, index++) { 3880 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL); 3881 result_h->obj_at_put(index, h()); 3882 } 3883 for (int i = 0; i < num_args; i++, index++) { 3884 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL); 3885 result_h->obj_at_put(index, h()); 3886 } 3887 return (jobjectArray) JNIHandles::make_local(THREAD, result_h()); 3888 JVM_END 3889 3890 JVM_LEAF_PROF(jint, JVM_FindSignal, JVM_FindSignal(const char *name)) 3891 return os::get_signal_number(name); 3892 JVM_END 3893 3894 JVM_ENTRY_PROF(void, JVM_VirtualThreadStart, JVM_VirtualThreadStart(JNIEnv* env, jobject vthread)) 3895 #if INCLUDE_JVMTI 3896 if (!DoJVMTIVirtualThreadTransitions) { 3897 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check"); 3898 return; 3899 } 3900 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) { 3901 JvmtiVTMSTransitionDisabler::VTMS_vthread_start(vthread); 3902 } else { 3903 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object 3904 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, false); 3905 } 3906 #endif 3907 JVM_END 3908 3909 JVM_ENTRY_PROF(void, JVM_VirtualThreadEnd, JVM_VirtualThreadEnd(JNIEnv* env, jobject vthread)) 3910 #if INCLUDE_JVMTI 3911 if (!DoJVMTIVirtualThreadTransitions) { 3912 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check"); 3913 return; 3914 } 3915 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) { 3916 JvmtiVTMSTransitionDisabler::VTMS_vthread_end(vthread); 3917 } else { 3918 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object 3919 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, true); 3920 } 3921 #endif 3922 JVM_END 3923 3924 // If notifications are disabled then just update the VTMS transition bit and return. 3925 // Otherwise, the bit is updated in the given jvmtiVTMSTransitionDisabler function call. 3926 JVM_ENTRY_PROF(void, JVM_VirtualThreadMount, JVM_VirtualThreadMount(JNIEnv* env, jobject vthread, jboolean hide)) 3927 #if INCLUDE_JVMTI 3928 if (!DoJVMTIVirtualThreadTransitions) { 3929 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check"); 3930 return; 3931 } 3932 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) { 3933 JvmtiVTMSTransitionDisabler::VTMS_vthread_mount(vthread, hide); 3934 } else { 3935 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object 3936 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, hide); 3937 } 3938 #endif 3939 JVM_END 3940 3941 // If notifications are disabled then just update the VTMS transition bit and return. 3942 // Otherwise, the bit is updated in the given jvmtiVTMSTransitionDisabler function call below. 3943 JVM_ENTRY_PROF(void, JVM_VirtualThreadUnmount, JVM_VirtualThreadUnmount(JNIEnv* env, jobject vthread, jboolean hide)) 3944 #if INCLUDE_JVMTI 3945 if (!DoJVMTIVirtualThreadTransitions) { 3946 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check"); 3947 return; 3948 } 3949 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) { 3950 JvmtiVTMSTransitionDisabler::VTMS_vthread_unmount(vthread, hide); 3951 } else { 3952 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object 3953 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, hide); 3954 } 3955 #endif 3956 JVM_END 3957 3958 // Always update the temporary VTMS transition bit. 3959 JVM_ENTRY_PROF(void, JVM_VirtualThreadHideFrames, JVM_VirtualThreadHideFrames(JNIEnv* env, jclass clazz, jboolean hide)) 3960 #if INCLUDE_JVMTI 3961 if (!DoJVMTIVirtualThreadTransitions) { 3962 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check"); 3963 return; 3964 } 3965 assert(!thread->is_in_VTMS_transition(), "sanity check"); 3966 assert(thread->is_in_tmp_VTMS_transition() != (bool)hide, "sanity check"); 3967 thread->toggle_is_in_tmp_VTMS_transition(); 3968 #endif 3969 JVM_END 3970 3971 // Notification from VirtualThread about disabling JVMTI Suspend in a sync critical section. 3972 // Needed to avoid deadlocks with JVMTI suspend mechanism. 3973 JVM_ENTRY(void, JVM_VirtualThreadDisableSuspend(JNIEnv* env, jclass clazz, jboolean enter)) 3974 #if INCLUDE_JVMTI 3975 if (!DoJVMTIVirtualThreadTransitions) { 3976 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check"); 3977 return; 3978 } 3979 assert(thread->is_disable_suspend() != (bool)enter, 3980 "nested or unbalanced monitor enter/exit is not allowed"); 3981 thread->toggle_is_disable_suspend(); 3982 #endif 3983 JVM_END 3984 3985 /* 3986 * Return the current class's class file version. The low order 16 bits of the 3987 * returned jint contain the class's major version. The high order 16 bits 3988 * contain the class's minor version. 3989 */ 3990 JVM_ENTRY_PROF(jint, JVM_GetClassFileVersion, JVM_GetClassFileVersion(JNIEnv* env, jclass current)) 3991 oop mirror = JNIHandles::resolve_non_null(current); 3992 if (java_lang_Class::is_primitive(mirror)) { 3993 // return latest major version and minor version of 0. 3994 return JVM_CLASSFILE_MAJOR_VERSION; 3995 } 3996 assert(!java_lang_Class::as_Klass(mirror)->is_array_klass(), "unexpected array class"); 3997 3998 Klass* c = java_lang_Class::as_Klass(mirror); 3999 assert(c->is_instance_klass(), "must be"); 4000 InstanceKlass* ik = InstanceKlass::cast(c); 4001 return (ik->minor_version() << 16) | ik->major_version(); 4002 JVM_END 4003 4004 /* 4005 * Ensure that code doing a stackwalk and using javaVFrame::locals() to 4006 * get the value will see a materialized value and not a scalar-replaced 4007 * null value. 4008 */ 4009 JVM_ENTRY_PROF(void, JVM_EnsureMaterializedForStackWalk_func, JVM_EnsureMaterializedForStackWalk_func(JNIEnv* env, jobject vthread, jobject value)) 4010 JVM_EnsureMaterializedForStackWalk(env, value); 4011 JVM_END 4012 4013 /* 4014 * Return JNI_TRUE if warnings are printed when agents are dynamically loaded. 4015 */ 4016 JVM_LEAF_PROF(jboolean, JVM_PrintWarningAtDynamicAgentLoad, JVM_PrintWarningAtDynamicAgentLoad(void)) 4017 return (EnableDynamicAgentLoading && !FLAG_IS_CMDLINE(EnableDynamicAgentLoading)) ? JNI_TRUE : JNI_FALSE; 4018 JVM_END 4019 4020 #define DO_COUNTERS(macro) \ 4021 macro(JVM_CurrentTimeMillis) \ 4022 macro(JVM_NanoTime) \ 4023 macro(JVM_GetNanoTimeAdjustment) \ 4024 macro(JVM_ArrayCopy) \ 4025 macro(JVM_GetProperties) \ 4026 macro(JVM_GetTemporaryDirectory) \ 4027 macro(JVM_BeforeHalt) \ 4028 macro(JVM_Halt) \ 4029 macro(JVM_GC) \ 4030 macro(JVM_MaxObjectInspectionAge) \ 4031 macro(JVM_TotalMemory) \ 4032 macro(JVM_FreeMemory) \ 4033 macro(JVM_MaxMemory) \ 4034 macro(JVM_ActiveProcessorCount) \ 4035 macro(JVM_IsUseContainerSupport) \ 4036 macro(JVM_FillInStackTrace) \ 4037 macro(JVM_GetExtendedNPEMessage) \ 4038 macro(JVM_InitStackTraceElementArray) \ 4039 macro(JVM_InitStackTraceElement) \ 4040 macro(JVM_ExpandStackFrameInfo) \ 4041 macro(JVM_CallStackWalk) \ 4042 macro(JVM_MoreStackWalk) \ 4043 macro(JVM_SetStackWalkContinuation) \ 4044 macro(JVM_IHashCode) \ 4045 macro(JVM_MonitorWait) \ 4046 macro(JVM_MonitorNotify) \ 4047 macro(JVM_MonitorNotifyAll) \ 4048 macro(JVM_Clone) \ 4049 macro(JVM_ReportFinalizationComplete) \ 4050 macro(JVM_IsFinalizationEnabled) \ 4051 macro(JVM_RegisterContinuationMethods) \ 4052 macro(JVM_NativePath) \ 4053 macro(JVM_GetCallerClass) \ 4054 macro(JVM_FindPrimitiveClass) \ 4055 macro(JVM_FindClassFromBootLoader) \ 4056 macro(JVM_FindClassFromCaller) \ 4057 macro(JVM_FindClassFromClass) \ 4058 macro(JVM_DefineClass) \ 4059 macro(JVM_LookupDefineClass) \ 4060 macro(JVM_DefineClassWithSource) \ 4061 macro(JVM_FindLoadedClass) \ 4062 macro(JVM_DefineModule) \ 4063 macro(JVM_SetBootLoaderUnnamedModule) \ 4064 macro(JVM_AddModuleExports) \ 4065 macro(JVM_AddModuleExportsToAllUnnamed) \ 4066 macro(JVM_AddModuleExportsToAll) \ 4067 macro(JVM_AddReadsModule) \ 4068 macro(JVM_DefineArchivedModules) \ 4069 macro(JVM_InitClassName) \ 4070 macro(JVM_GetClassInterfaces) \ 4071 macro(JVM_IsInterface) \ 4072 macro(JVM_IsHiddenClass) \ 4073 macro(JVM_GetProtectionDomain) \ 4074 macro(JVM_GetInheritedAccessControlContext) \ 4075 macro(JVM_GetStackAccessControlContext) \ 4076 macro(JVM_FindScopedValueBindings) \ 4077 macro(JVM_IsArrayClass) \ 4078 macro(JVM_IsPrimitiveClass) \ 4079 macro(JVM_GetClassModifiers) \ 4080 macro(JVM_GetDeclaredClasses) \ 4081 macro(JVM_GetDeclaringClass) \ 4082 macro(JVM_GetSimpleBinaryName) \ 4083 macro(JVM_GetClassSignature) \ 4084 macro(JVM_GetClassAnnotations) \ 4085 macro(JVM_GetClassTypeAnnotations) \ 4086 macro(JVM_GetMethodTypeAnnotations) \ 4087 macro(JVM_GetFieldTypeAnnotations) \ 4088 macro(JVM_GetMethodParameters) \ 4089 macro(JVM_GetClassDeclaredFields) \ 4090 macro(JVM_IsRecord) \ 4091 macro(JVM_GetRecordComponents) \ 4092 macro(JVM_GetClassDeclaredMethods) \ 4093 macro(JVM_GetClassDeclaredConstructors) \ 4094 macro(JVM_GetClassAccessFlags) \ 4095 macro(JVM_AreNestMates) \ 4096 macro(JVM_GetNestHost) \ 4097 macro(JVM_GetNestMembers) \ 4098 macro(JVM_GetPermittedSubclasses) \ 4099 macro(JVM_GetClassConstantPool) \ 4100 macro(JVM_ConstantPoolGetSize) \ 4101 macro(JVM_ConstantPoolGetClassAt) \ 4102 macro(JVM_ConstantPoolGetClassAtIfLoaded) \ 4103 macro(JVM_ConstantPoolGetMethodAt) \ 4104 macro(JVM_ConstantPoolGetMethodAtIfLoaded) \ 4105 macro(JVM_ConstantPoolGetFieldAt) \ 4106 macro(JVM_ConstantPoolGetFieldAtIfLoaded) \ 4107 macro(JVM_ConstantPoolGetMemberRefInfoAt) \ 4108 macro(JVM_ConstantPoolGetClassRefIndexAt) \ 4109 macro(JVM_ConstantPoolGetNameAndTypeRefIndexAt) \ 4110 macro(JVM_ConstantPoolGetNameAndTypeRefInfoAt) \ 4111 macro(JVM_ConstantPoolGetIntAt) \ 4112 macro(JVM_ConstantPoolGetLongAt) \ 4113 macro(JVM_ConstantPoolGetFloatAt) \ 4114 macro(JVM_ConstantPoolGetDoubleAt) \ 4115 macro(JVM_ConstantPoolGetStringAt) \ 4116 macro(JVM_ConstantPoolGetUTF8At) \ 4117 macro(JVM_ConstantPoolGetTagAt) \ 4118 macro(JVM_DesiredAssertionStatus) \ 4119 macro(JVM_AssertionStatusDirectives) \ 4120 macro(JVM_GetClassNameUTF) \ 4121 macro(JVM_GetClassCPTypes) \ 4122 macro(JVM_GetClassCPEntriesCount) \ 4123 macro(JVM_GetClassFieldsCount) \ 4124 macro(JVM_GetClassMethodsCount) \ 4125 macro(JVM_GetMethodIxExceptionIndexes) \ 4126 macro(JVM_GetMethodIxExceptionsCount) \ 4127 macro(JVM_GetMethodIxByteCode) \ 4128 macro(JVM_GetMethodIxByteCodeLength) \ 4129 macro(JVM_GetMethodIxExceptionTableEntry) \ 4130 macro(JVM_GetMethodIxExceptionTableLength) \ 4131 macro(JVM_GetMethodIxModifiers) \ 4132 macro(JVM_GetFieldIxModifiers) \ 4133 macro(JVM_GetMethodIxLocalsCount) \ 4134 macro(JVM_GetMethodIxArgsSize) \ 4135 macro(JVM_GetMethodIxMaxStack) \ 4136 macro(JVM_IsConstructorIx) \ 4137 macro(JVM_IsVMGeneratedMethodIx) \ 4138 macro(JVM_GetMethodIxNameUTF) \ 4139 macro(JVM_GetMethodIxSignatureUTF) \ 4140 macro(JVM_GetCPFieldNameUTF) \ 4141 macro(JVM_GetCPMethodNameUTF) \ 4142 macro(JVM_GetCPMethodSignatureUTF) \ 4143 macro(JVM_GetCPFieldSignatureUTF) \ 4144 macro(JVM_GetCPClassNameUTF) \ 4145 macro(JVM_GetCPFieldClassNameUTF) \ 4146 macro(JVM_GetCPMethodClassNameUTF) \ 4147 macro(JVM_GetCPFieldModifiers) \ 4148 macro(JVM_GetCPMethodModifiers) \ 4149 macro(JVM_ReleaseUTF) \ 4150 macro(JVM_IsSameClassPackage) \ 4151 macro(JVM_StartThread) \ 4152 macro(JVM_SetThreadPriority) \ 4153 macro(JVM_Yield) \ 4154 macro(JVM_SleepNanos) \ 4155 macro(JVM_CurrentCarrierThread) \ 4156 macro(JVM_CurrentThread) \ 4157 macro(JVM_SetCurrentThread) \ 4158 macro(JVM_GetNextThreadIdOffset) \ 4159 macro(JVM_Interrupt) \ 4160 macro(JVM_HoldsLock) \ 4161 macro(JVM_GetStackTrace) \ 4162 macro(JVM_SetNativeThreadName) \ 4163 macro(JVM_ScopedValueCache) \ 4164 macro(JVM_SetScopedValueCache) \ 4165 macro(JVM_GetClassContext) \ 4166 macro(JVM_GetSystemPackage) \ 4167 macro(JVM_GetSystemPackages) \ 4168 macro(JVM_GetAndClearReferencePendingList) \ 4169 macro(JVM_HasReferencePendingList) \ 4170 macro(JVM_WaitForReferencePendingList) \ 4171 macro(JVM_ReferenceRefersTo) \ 4172 macro(JVM_ReferenceClear) \ 4173 macro(JVM_PhantomReferenceRefersTo) \ 4174 macro(JVM_LatestUserDefinedLoader) \ 4175 macro(JVM_GetArrayLength) \ 4176 macro(JVM_GetArrayElement) \ 4177 macro(JVM_GetPrimitiveArrayElement) \ 4178 macro(JVM_SetArrayElement) \ 4179 macro(JVM_SetPrimitiveArrayElement) \ 4180 macro(JVM_NewArray) \ 4181 macro(JVM_NewMultiArray) \ 4182 macro(JVM_LoadZipLibrary) \ 4183 macro(JVM_LoadLibrary) \ 4184 macro(JVM_UnloadLibrary) \ 4185 macro(JVM_FindLibraryEntry) \ 4186 macro(JVM_IsSupportedJNIVersion) \ 4187 macro(JVM_IsPreviewEnabled) \ 4188 macro(JVM_IsContinuationsSupported) \ 4189 macro(JVM_IsForeignLinkerSupported) \ 4190 macro(JVM_InternString) \ 4191 macro(JVM_InvokeMethod) \ 4192 macro(JVM_NewInstanceFromConstructor) \ 4193 macro(JVM_InitializeFromArchive) \ 4194 macro(JVM_RegisterLambdaProxyClassForArchiving) \ 4195 macro(JVM_LookupLambdaProxyClassFromArchive) \ 4196 macro(JVM_GetRandomSeedForDumping) \ 4197 macro(JVM_LogLambdaFormInvoker) \ 4198 macro(JVM_LogDynamicProxy) \ 4199 macro(JVM_DumpClassListToFile) \ 4200 macro(JVM_DumpDynamicArchive) \ 4201 macro(JVM_GetAllThreads) \ 4202 macro(JVM_DumpThreads) \ 4203 macro(JVM_GetManagement) \ 4204 macro(JVM_InitAgentProperties) \ 4205 macro(JVM_GetEnclosingMethodInfo) \ 4206 macro(JVM_GetVmArguments) \ 4207 macro(JVM_FindSignal) \ 4208 macro(JVM_VirtualThreadStart) \ 4209 macro(JVM_VirtualThreadEnd) \ 4210 macro(JVM_VirtualThreadMount) \ 4211 macro(JVM_VirtualThreadUnmount) \ 4212 macro(JVM_VirtualThreadHideFrames) \ 4213 macro(JVM_GetClassFileVersion) \ 4214 macro(JVM_EnsureMaterializedForStackWalk_func) \ 4215 macro(JVM_PrintWarningAtDynamicAgentLoad) 4216 4217 #define INIT_COUNTER(name) \ 4218 NEWPERFTICKCOUNTERS(_perf_##name##_timer, SUN_RT, #name); \ 4219 NEWPERFEVENTCOUNTER(_perf_##name##_count, SUN_RT, #name "_count"); \ 4220 4221 void perf_jvm_init() { 4222 if (ProfileVMCalls && UsePerfData) { 4223 EXCEPTION_MARK; 4224 4225 DO_COUNTERS(INIT_COUNTER) 4226 4227 if (HAS_PENDING_EXCEPTION) { 4228 vm_exit_during_initialization("jvm_perf_init failed unexpectedly"); 4229 } 4230 } 4231 } 4232 4233 #undef INIT_COUNTER 4234 4235 #define PRINT_COUNTER(name) {\ 4236 jlong count = _perf_##name##_count->get_value(); \ 4237 if (count > 0) { \ 4238 st->print_cr(" %-40s = " JLONG_FORMAT_W(6) "us (elapsed) " JLONG_FORMAT_W(6) "us (thread) (" JLONG_FORMAT_W(5) " events)", \ 4239 #name, \ 4240 _perf_##name##_timer->elapsed_counter_value_us(), \ 4241 _perf_##name##_timer->thread_counter_value_us(), count); \ 4242 }} 4243 4244 void perf_jvm_print_on(outputStream* st) { 4245 if (ProfileVMCalls && UsePerfData) { 4246 DO_COUNTERS(PRINT_COUNTER) 4247 } else { 4248 st->print_cr(" JVM: no info (%s is disabled)", (UsePerfData ? "ProfileVMCalls" : "UsePerfData")); 4249 } 4250 } 4251 4252 #undef PRINT_COUNTER