1 /* 2 * Copyright (c) 2011, 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/cds_globals.hpp" 27 #include "classfile/classLoaderDataGraph.hpp" 28 #include "classfile/classLoaderHierarchyDCmd.hpp" 29 #include "classfile/classLoaderStats.hpp" 30 #include "classfile/javaClasses.hpp" 31 #include "classfile/systemDictionary.hpp" 32 #include "classfile/vmClasses.hpp" 33 #include "code/codeCache.hpp" 34 #include "compiler/compilationMemoryStatistic.hpp" 35 #include "compiler/compiler_globals.hpp" 36 #include "compiler/compileBroker.hpp" 37 #include "compiler/directivesParser.hpp" 38 #include "gc/shared/gcVMOperations.hpp" 39 #include "jvm.h" 40 #include "memory/metaspace/metaspaceDCmd.hpp" 41 #include "memory/resourceArea.hpp" 42 #include "memory/universe.hpp" 43 #include "nmt/memMapPrinter.hpp" 44 #include "nmt/memTracker.hpp" 45 #include "nmt/nmtDCmd.hpp" 46 #include "oops/instanceKlass.hpp" 47 #include "oops/objArrayOop.inline.hpp" 48 #include "oops/oop.inline.hpp" 49 #include "oops/typeArrayOop.inline.hpp" 50 #include "prims/jvmtiAgentList.hpp" 51 #include "runtime/fieldDescriptor.inline.hpp" 52 #include "runtime/flags/jvmFlag.hpp" 53 #include "runtime/handles.inline.hpp" 54 #include "runtime/interfaceSupport.inline.hpp" 55 #include "runtime/javaCalls.hpp" 56 #include "runtime/jniHandles.hpp" 57 #include "runtime/os.hpp" 58 #include "runtime/vmOperations.hpp" 59 #include "runtime/vm_version.hpp" 60 #include "services/diagnosticArgument.hpp" 61 #include "services/diagnosticCommand.hpp" 62 #include "services/diagnosticFramework.hpp" 63 #include "services/heapDumper.hpp" 64 #include "services/management.hpp" 65 #include "services/writeableFlags.hpp" 66 #include "utilities/debug.hpp" 67 #include "utilities/events.hpp" 68 #include "utilities/formatBuffer.hpp" 69 #include "utilities/macros.hpp" 70 #include "utilities/parseInteger.hpp" 71 #ifdef LINUX 72 #include "os_posix.hpp" 73 #include "mallocInfoDcmd.hpp" 74 #include "trimCHeapDCmd.hpp" 75 #include <errno.h> 76 #endif 77 78 static void loadAgentModule(TRAPS) { 79 ResourceMark rm(THREAD); 80 HandleMark hm(THREAD); 81 82 JavaValue result(T_OBJECT); 83 Handle h_module_name = java_lang_String::create_from_str("jdk.management.agent", CHECK); 84 JavaCalls::call_static(&result, 85 vmClasses::module_Modules_klass(), 86 vmSymbols::loadModule_name(), 87 vmSymbols::loadModule_signature(), 88 h_module_name, 89 THREAD); 90 } 91 92 void DCmd::register_dcmds(){ 93 // Registration of the diagnostic commands 94 // First argument specifies which interfaces will export the command 95 // Second argument specifies if the command is enabled 96 // Third argument specifies if the command is hidden 97 uint32_t full_export = DCmd_Source_Internal | DCmd_Source_AttachAPI 98 | DCmd_Source_MBean; 99 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<HelpDCmd>(full_export, true, false)); 100 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VersionDCmd>(full_export, true, false)); 101 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CommandLineDCmd>(full_export, true, false)); 102 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<PrintSystemPropertiesDCmd>(full_export, true, false)); 103 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<PrintVMFlagsDCmd>(full_export, true, false)); 104 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SetVMFlagDCmd>(full_export, true, false)); 105 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VMDynamicLibrariesDCmd>(full_export, true, false)); 106 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VMUptimeDCmd>(full_export, true, false)); 107 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VMInfoDCmd>(full_export, true, false)); 108 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SystemGCDCmd>(full_export, true, false)); 109 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<RunFinalizationDCmd>(full_export, true, false)); 110 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<HeapInfoDCmd>(full_export, true, false)); 111 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<FinalizerInfoDCmd>(full_export, true, false)); 112 #if INCLUDE_SERVICES 113 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<HeapDumpDCmd>(DCmd_Source_Internal | DCmd_Source_AttachAPI, true, false)); 114 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassHistogramDCmd>(full_export, true, false)); 115 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SystemDictionaryDCmd>(full_export, true, false)); 116 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassHierarchyDCmd>(full_export, true, false)); 117 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassesDCmd>(full_export, true, false)); 118 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SymboltableDCmd>(full_export, true, false)); 119 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<StringtableDCmd>(full_export, true, false)); 120 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<metaspace::MetaspaceDCmd>(full_export, true, false)); 121 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<EventLogDCmd>(full_export, true, false)); 122 #if INCLUDE_JVMTI // Both JVMTI and SERVICES have to be enabled to have this dcmd 123 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JVMTIAgentLoadDCmd>(full_export, true, false)); 124 #endif // INCLUDE_JVMTI 125 #endif // INCLUDE_SERVICES 126 #if INCLUDE_JVMTI 127 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JVMTIDataDumpDCmd>(full_export, true, false)); 128 #endif // INCLUDE_JVMTI 129 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ThreadDumpDCmd>(full_export, true, false)); 130 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ThreadDumpToFileDCmd>(full_export, true, false)); 131 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassLoaderStatsDCmd>(full_export, true, false)); 132 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassLoaderHierarchyDCmd>(full_export, true, false)); 133 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompileQueueDCmd>(full_export, true, false)); 134 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CodeListDCmd>(full_export, true, false)); 135 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CodeCacheDCmd>(full_export, true, false)); 136 #ifdef LINUX 137 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<PerfMapDCmd>(full_export, true, false)); 138 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<TrimCLibcHeapDCmd>(full_export, true, false)); 139 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<MallocInfoDcmd>(full_export, true, false)); 140 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SystemMapDCmd>(full_export, true,false)); 141 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SystemDumpMapDCmd>(full_export, true,false)); 142 #endif // LINUX 143 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CodeHeapAnalyticsDCmd>(full_export, true, false)); 144 145 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesPrintDCmd>(full_export, true, false)); 146 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesAddDCmd>(full_export, true, false)); 147 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesReplaceDCmd>(full_export, true, false)); 148 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesRemoveDCmd>(full_export, true, false)); 149 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesClearDCmd>(full_export, true, false)); 150 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilationMemoryStatisticDCmd>(full_export, true, false)); 151 152 // Enhanced JMX Agent Support 153 // These commands won't be exported via the DiagnosticCommandMBean until an 154 // appropriate permission is created for them 155 uint32_t jmx_agent_export_flags = DCmd_Source_Internal | DCmd_Source_AttachAPI; 156 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStartRemoteDCmd>(jmx_agent_export_flags, true,false)); 157 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStartLocalDCmd>(jmx_agent_export_flags, true,false)); 158 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStopRemoteDCmd>(jmx_agent_export_flags, true,false)); 159 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStatusDCmd>(jmx_agent_export_flags, true,false)); 160 161 // Debug on cmd (only makes sense with JVMTI since the agentlib needs it). 162 #if INCLUDE_JVMTI 163 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<DebugOnCmdStartDCmd>(full_export, true, true)); 164 #endif // INCLUDE_JVMTI 165 166 #if INCLUDE_CDS 167 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<DumpSharedArchiveDCmd>(full_export, true, false)); 168 #endif // INCLUDE_CDS 169 170 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<NMTDCmd>(full_export, true, false)); 171 } 172 173 HelpDCmd::HelpDCmd(outputStream* output, bool heap) : DCmdWithParser(output, heap), 174 _all("-all", "Show help for all commands", "BOOLEAN", false, "false"), 175 _cmd("command name", "The name of the command for which we want help", 176 "STRING", false) { 177 _dcmdparser.add_dcmd_option(&_all); 178 _dcmdparser.add_dcmd_argument(&_cmd); 179 }; 180 181 182 static int compare_strings(const char** s1, const char** s2) { 183 return ::strcmp(*s1, *s2); 184 } 185 186 void HelpDCmd::execute(DCmdSource source, TRAPS) { 187 if (_all.value()) { 188 GrowableArray<const char*>* cmd_list = DCmdFactory::DCmd_list(source); 189 cmd_list->sort(compare_strings); 190 for (int i = 0; i < cmd_list->length(); i++) { 191 DCmdFactory* factory = DCmdFactory::factory(source, cmd_list->at(i), 192 strlen(cmd_list->at(i))); 193 output()->print_cr("%s%s", factory->name(), 194 factory->is_enabled() ? "" : " [disabled]"); 195 output()->print_cr("\t%s", factory->description()); 196 output()->cr(); 197 factory = factory->next(); 198 } 199 } else if (_cmd.has_value()) { 200 DCmd* cmd = nullptr; 201 DCmdFactory* factory = DCmdFactory::factory(source, _cmd.value(), 202 strlen(_cmd.value())); 203 if (factory != nullptr) { 204 output()->print_cr("%s%s", factory->name(), 205 factory->is_enabled() ? "" : " [disabled]"); 206 output()->print_cr("%s", factory->description()); 207 output()->print_cr("\nImpact: %s", factory->impact()); 208 output()->cr(); 209 cmd = factory->create_resource_instance(output()); 210 if (cmd != nullptr) { 211 DCmdMark mark(cmd); 212 cmd->print_help(factory->name()); 213 } 214 } else { 215 output()->print_cr("Help unavailable : '%s' : No such command", _cmd.value()); 216 } 217 } else { 218 output()->print_cr("The following commands are available:"); 219 GrowableArray<const char *>* cmd_list = DCmdFactory::DCmd_list(source); 220 cmd_list->sort(compare_strings); 221 for (int i = 0; i < cmd_list->length(); i++) { 222 DCmdFactory* factory = DCmdFactory::factory(source, cmd_list->at(i), 223 strlen(cmd_list->at(i))); 224 output()->print_cr("%s%s", factory->name(), 225 factory->is_enabled() ? "" : " [disabled]"); 226 factory = factory->_next; 227 } 228 output()->print_cr("\nFor more information about a specific command use 'help <command>'."); 229 } 230 } 231 232 void VersionDCmd::execute(DCmdSource source, TRAPS) { 233 output()->print_cr("%s version %s", VM_Version::vm_name(), 234 VM_Version::vm_release()); 235 JDK_Version jdk_version = JDK_Version::current(); 236 if (jdk_version.patch_version() > 0) { 237 output()->print_cr("JDK %d.%d.%d.%d", jdk_version.major_version(), 238 jdk_version.minor_version(), jdk_version.security_version(), 239 jdk_version.patch_version()); 240 } else { 241 output()->print_cr("JDK %d.%d.%d", jdk_version.major_version(), 242 jdk_version.minor_version(), jdk_version.security_version()); 243 } 244 } 245 246 PrintVMFlagsDCmd::PrintVMFlagsDCmd(outputStream* output, bool heap) : 247 DCmdWithParser(output, heap), 248 _all("-all", "Print all flags supported by the VM", "BOOLEAN", false, "false") { 249 _dcmdparser.add_dcmd_option(&_all); 250 } 251 252 void PrintVMFlagsDCmd::execute(DCmdSource source, TRAPS) { 253 if (_all.value()) { 254 JVMFlag::printFlags(output(), true); 255 } else { 256 JVMFlag::printSetFlags(output()); 257 } 258 } 259 260 SetVMFlagDCmd::SetVMFlagDCmd(outputStream* output, bool heap) : 261 DCmdWithParser(output, heap), 262 _flag("flag name", "The name of the flag we want to set", 263 "STRING", true), 264 _value("string value", "The value we want to set", "STRING", false) { 265 _dcmdparser.add_dcmd_argument(&_flag); 266 _dcmdparser.add_dcmd_argument(&_value); 267 } 268 269 void SetVMFlagDCmd::execute(DCmdSource source, TRAPS) { 270 const char* val = nullptr; 271 if (_value.value() != nullptr) { 272 val = _value.value(); 273 } 274 275 FormatBuffer<80> err_msg("%s", ""); 276 int ret = WriteableFlags::set_flag(_flag.value(), val, JVMFlagOrigin::MANAGEMENT, err_msg); 277 278 if (ret != JVMFlag::SUCCESS) { 279 output()->print_cr("%s", err_msg.buffer()); 280 } 281 } 282 283 void JVMTIDataDumpDCmd::execute(DCmdSource source, TRAPS) { 284 if (JvmtiExport::should_post_data_dump()) { 285 JvmtiExport::post_data_dump(); 286 } 287 } 288 289 #if INCLUDE_SERVICES 290 #if INCLUDE_JVMTI 291 JVMTIAgentLoadDCmd::JVMTIAgentLoadDCmd(outputStream* output, bool heap) : 292 DCmdWithParser(output, heap), 293 _libpath("library path", "Absolute path of the JVMTI agent to load.", 294 "STRING", true), 295 _option("agent option", "Option string to pass the agent.", "STRING", false) { 296 _dcmdparser.add_dcmd_argument(&_libpath); 297 _dcmdparser.add_dcmd_argument(&_option); 298 } 299 300 void JVMTIAgentLoadDCmd::execute(DCmdSource source, TRAPS) { 301 302 if (_libpath.value() == nullptr) { 303 output()->print_cr("JVMTI.agent_load dcmd needs library path."); 304 return; 305 } 306 307 char *suffix = strrchr(_libpath.value(), '.'); 308 bool is_java_agent = (suffix != nullptr) && (strncmp(".jar", suffix, 4) == 0); 309 310 if (is_java_agent) { 311 if (_option.value() == nullptr) { 312 JvmtiAgentList::load_agent("instrument", false, _libpath.value(), output()); 313 } else { 314 size_t opt_len = strlen(_libpath.value()) + strlen(_option.value()) + 2; 315 if (opt_len > 4096) { 316 output()->print_cr("JVMTI agent attach failed: Options is too long."); 317 return; 318 } 319 320 char *opt = (char *)os::malloc(opt_len, mtInternal); 321 if (opt == nullptr) { 322 output()->print_cr("JVMTI agent attach failed: " 323 "Could not allocate " SIZE_FORMAT " bytes for argument.", 324 opt_len); 325 return; 326 } 327 328 jio_snprintf(opt, opt_len, "%s=%s", _libpath.value(), _option.value()); 329 JvmtiAgentList::load_agent("instrument", false, opt, output()); 330 331 os::free(opt); 332 } 333 } else { 334 JvmtiAgentList::load_agent(_libpath.value(), true, _option.value(), output()); 335 } 336 } 337 338 #endif // INCLUDE_JVMTI 339 #endif // INCLUDE_SERVICES 340 341 void PrintSystemPropertiesDCmd::execute(DCmdSource source, TRAPS) { 342 // load VMSupport 343 Symbol* klass = vmSymbols::jdk_internal_vm_VMSupport(); 344 Klass* k = SystemDictionary::resolve_or_fail(klass, true, CHECK); 345 InstanceKlass* ik = InstanceKlass::cast(k); 346 if (ik->should_be_initialized()) { 347 ik->initialize(THREAD); 348 } 349 if (HAS_PENDING_EXCEPTION) { 350 java_lang_Throwable::print(PENDING_EXCEPTION, output()); 351 output()->cr(); 352 CLEAR_PENDING_EXCEPTION; 353 return; 354 } 355 356 // invoke the serializePropertiesToByteArray method 357 JavaValue result(T_OBJECT); 358 JavaCallArguments args; 359 360 Symbol* signature = vmSymbols::void_byte_array_signature(); 361 JavaCalls::call_static(&result, 362 ik, 363 vmSymbols::serializePropertiesToByteArray_name(), 364 signature, 365 &args, 366 THREAD); 367 if (HAS_PENDING_EXCEPTION) { 368 java_lang_Throwable::print(PENDING_EXCEPTION, output()); 369 output()->cr(); 370 CLEAR_PENDING_EXCEPTION; 371 return; 372 } 373 374 // The result should be a [B 375 oop res = result.get_oop(); 376 assert(res->is_typeArray(), "just checking"); 377 assert(TypeArrayKlass::cast(res->klass())->element_type() == T_BYTE, "just checking"); 378 379 // copy the bytes to the output stream 380 typeArrayOop ba = typeArrayOop(res); 381 jbyte* addr = typeArrayOop(res)->byte_at_addr(0); 382 output()->print_raw((const char*)addr, ba->length()); 383 } 384 385 VMUptimeDCmd::VMUptimeDCmd(outputStream* output, bool heap) : 386 DCmdWithParser(output, heap), 387 _date("-date", "Add a prefix with current date", "BOOLEAN", false, "false") { 388 _dcmdparser.add_dcmd_option(&_date); 389 } 390 391 void VMUptimeDCmd::execute(DCmdSource source, TRAPS) { 392 if (_date.value()) { 393 output()->date_stamp(true, "", ": "); 394 } 395 output()->time_stamp().update_to(tty->time_stamp().ticks()); 396 output()->stamp(); 397 output()->print_cr(" s"); 398 } 399 400 void VMInfoDCmd::execute(DCmdSource source, TRAPS) { 401 VMError::print_vm_info(_output); 402 } 403 404 void SystemGCDCmd::execute(DCmdSource source, TRAPS) { 405 Universe::heap()->collect(GCCause::_dcmd_gc_run); 406 } 407 408 void RunFinalizationDCmd::execute(DCmdSource source, TRAPS) { 409 Klass* k = vmClasses::System_klass(); 410 JavaValue result(T_VOID); 411 JavaCalls::call_static(&result, k, 412 vmSymbols::run_finalization_name(), 413 vmSymbols::void_method_signature(), CHECK); 414 } 415 416 void HeapInfoDCmd::execute(DCmdSource source, TRAPS) { 417 MutexLocker hl(THREAD, Heap_lock); 418 Universe::heap()->print_on(output()); 419 } 420 421 void FinalizerInfoDCmd::execute(DCmdSource source, TRAPS) { 422 ResourceMark rm(THREAD); 423 424 if (!InstanceKlass::is_finalization_enabled()) { 425 output()->print_cr("Finalization is disabled"); 426 return; 427 } 428 429 Klass* k = SystemDictionary::resolve_or_fail( 430 vmSymbols::finalizer_histogram_klass(), true, CHECK); 431 432 JavaValue result(T_ARRAY); 433 434 // We are calling lang.ref.FinalizerHistogram.getFinalizerHistogram() method 435 // and expect it to return array of FinalizerHistogramEntry as Object[] 436 437 JavaCalls::call_static(&result, k, 438 vmSymbols::get_finalizer_histogram_name(), 439 vmSymbols::void_finalizer_histogram_entry_array_signature(), CHECK); 440 441 objArrayOop result_oop = (objArrayOop) result.get_oop(); 442 if (result_oop->length() == 0) { 443 output()->print_cr("No instances waiting for finalization found"); 444 return; 445 } 446 447 oop foop = result_oop->obj_at(0); 448 InstanceKlass* ik = InstanceKlass::cast(foop->klass()); 449 450 fieldDescriptor count_fd, name_fd; 451 452 Klass* count_res = ik->find_field( 453 vmSymbols::finalizer_histogram_entry_count_field(), vmSymbols::int_signature(), &count_fd); 454 455 Klass* name_res = ik->find_field( 456 vmSymbols::finalizer_histogram_entry_name_field(), vmSymbols::string_signature(), &name_fd); 457 458 assert(count_res != nullptr && name_res != nullptr, "Unexpected layout of FinalizerHistogramEntry"); 459 460 output()->print_cr("Unreachable instances waiting for finalization"); 461 output()->print_cr("#instances class name"); 462 output()->print_cr("-----------------------"); 463 464 for (int i = 0; i < result_oop->length(); ++i) { 465 oop element_oop = result_oop->obj_at(i); 466 oop str_oop = element_oop->obj_field(name_fd.offset()); 467 char *name = java_lang_String::as_utf8_string(str_oop); 468 int count = element_oop->int_field(count_fd.offset()); 469 output()->print_cr("%10d %s", count, name); 470 } 471 } 472 473 #if INCLUDE_SERVICES // Heap dumping/inspection supported 474 HeapDumpDCmd::HeapDumpDCmd(outputStream* output, bool heap) : 475 DCmdWithParser(output, heap), 476 _filename("filename","Name of the dump file", "STRING",true), 477 _all("-all", "Dump all objects, including unreachable objects", 478 "BOOLEAN", false, "false"), 479 _gzip("-gz", "If specified, the heap dump is written in gzipped format " 480 "using the given compression level. 1 (recommended) is the fastest, " 481 "9 the strongest compression.", "INT", false, "1"), 482 _overwrite("-overwrite", "If specified, the dump file will be overwritten if it exists", 483 "BOOLEAN", false, "false"), 484 _parallel("-parallel", "Number of parallel threads to use for heap dump. The VM " 485 "will try to use the specified number of threads, but might use fewer.", 486 "INT", false, "1") { 487 _dcmdparser.add_dcmd_option(&_all); 488 _dcmdparser.add_dcmd_argument(&_filename); 489 _dcmdparser.add_dcmd_option(&_gzip); 490 _dcmdparser.add_dcmd_option(&_overwrite); 491 _dcmdparser.add_dcmd_option(&_parallel); 492 } 493 494 void HeapDumpDCmd::execute(DCmdSource source, TRAPS) { 495 jlong level = -1; // -1 means no compression. 496 jlong parallel = HeapDumper::default_num_of_dump_threads(); 497 498 if (_gzip.is_set()) { 499 level = _gzip.value(); 500 501 if (level < 1 || level > 9) { 502 output()->print_cr("Compression level out of range (1-9): " JLONG_FORMAT, level); 503 return; 504 } 505 } 506 507 if (_parallel.is_set()) { 508 parallel = _parallel.value(); 509 510 if (parallel < 0) { 511 output()->print_cr("Invalid number of parallel dump threads."); 512 return; 513 } else if (parallel == 0) { 514 // 0 implies to disable parallel heap dump, in such case, we use serial dump instead 515 parallel = 1; 516 } 517 } 518 519 // Request a full GC before heap dump if _all is false 520 // This helps reduces the amount of unreachable objects in the dump 521 // and makes it easier to browse. 522 HeapDumper dumper(!_all.value() /* request GC if _all is false*/); 523 dumper.dump(_filename.value(), output(), (int) level, _overwrite.value(), (uint)parallel); 524 } 525 526 ClassHistogramDCmd::ClassHistogramDCmd(outputStream* output, bool heap) : 527 DCmdWithParser(output, heap), 528 _all("-all", "Inspect all objects, including unreachable objects", 529 "BOOLEAN", false, "false"), 530 _parallel_thread_num("-parallel", 531 "Number of parallel threads to use for heap inspection. " 532 "0 (the default) means let the VM determine the number of threads to use. " 533 "1 means use one thread (disable parallelism). " 534 "For any other value the VM will try to use the specified number of " 535 "threads, but might use fewer.", 536 "INT", false, "0") { 537 _dcmdparser.add_dcmd_option(&_all); 538 _dcmdparser.add_dcmd_option(&_parallel_thread_num); 539 } 540 541 void ClassHistogramDCmd::execute(DCmdSource source, TRAPS) { 542 jlong num = _parallel_thread_num.value(); 543 if (num < 0) { 544 output()->print_cr("Parallel thread number out of range (>=0): " JLONG_FORMAT, num); 545 return; 546 } 547 uint parallel_thread_num = num == 0 548 ? MAX2<uint>(1, (uint)os::initial_active_processor_count() * 3 / 8) 549 : num; 550 VM_GC_HeapInspection heapop(output(), 551 !_all.value(), /* request full gc if false */ 552 parallel_thread_num); 553 VMThread::execute(&heapop); 554 } 555 556 #endif // INCLUDE_SERVICES 557 558 ThreadDumpDCmd::ThreadDumpDCmd(outputStream* output, bool heap) : 559 DCmdWithParser(output, heap), 560 _locks("-l", "print java.util.concurrent locks", "BOOLEAN", false, "false"), 561 _extended("-e", "print extended thread information", "BOOLEAN", false, "false") { 562 _dcmdparser.add_dcmd_option(&_locks); 563 _dcmdparser.add_dcmd_option(&_extended); 564 } 565 566 void ThreadDumpDCmd::execute(DCmdSource source, TRAPS) { 567 // thread stacks and JNI global handles 568 VM_PrintThreads op1(output(), _locks.value(), _extended.value(), true /* print JNI handle info */); 569 VMThread::execute(&op1); 570 571 // Deadlock detection 572 VM_FindDeadlocks op2(output()); 573 VMThread::execute(&op2); 574 } 575 576 // Enhanced JMX Agent support 577 578 JMXStartRemoteDCmd::JMXStartRemoteDCmd(outputStream *output, bool heap_allocated) : 579 580 DCmdWithParser(output, heap_allocated), 581 582 _config_file 583 ("config.file", 584 "set com.sun.management.config.file", "STRING", false), 585 586 _jmxremote_host 587 ("jmxremote.host", 588 "set com.sun.management.jmxremote.host", "STRING", false), 589 590 _jmxremote_port 591 ("jmxremote.port", 592 "set com.sun.management.jmxremote.port", "STRING", false), 593 594 _jmxremote_rmi_port 595 ("jmxremote.rmi.port", 596 "set com.sun.management.jmxremote.rmi.port", "STRING", false), 597 598 _jmxremote_ssl 599 ("jmxremote.ssl", 600 "set com.sun.management.jmxremote.ssl", "STRING", false), 601 602 _jmxremote_registry_ssl 603 ("jmxremote.registry.ssl", 604 "set com.sun.management.jmxremote.registry.ssl", "STRING", false), 605 606 _jmxremote_authenticate 607 ("jmxremote.authenticate", 608 "set com.sun.management.jmxremote.authenticate", "STRING", false), 609 610 _jmxremote_password_file 611 ("jmxremote.password.file", 612 "set com.sun.management.jmxremote.password.file", "STRING", false), 613 614 _jmxremote_access_file 615 ("jmxremote.access.file", 616 "set com.sun.management.jmxremote.access.file", "STRING", false), 617 618 _jmxremote_login_config 619 ("jmxremote.login.config", 620 "set com.sun.management.jmxremote.login.config", "STRING", false), 621 622 _jmxremote_ssl_enabled_cipher_suites 623 ("jmxremote.ssl.enabled.cipher.suites", 624 "set com.sun.management.jmxremote.ssl.enabled.cipher.suite", "STRING", false), 625 626 _jmxremote_ssl_enabled_protocols 627 ("jmxremote.ssl.enabled.protocols", 628 "set com.sun.management.jmxremote.ssl.enabled.protocols", "STRING", false), 629 630 _jmxremote_ssl_need_client_auth 631 ("jmxremote.ssl.need.client.auth", 632 "set com.sun.management.jmxremote.need.client.auth", "STRING", false), 633 634 _jmxremote_ssl_config_file 635 ("jmxremote.ssl.config.file", 636 "set com.sun.management.jmxremote.ssl.config.file", "STRING", false), 637 638 // JDP Protocol support 639 _jmxremote_autodiscovery 640 ("jmxremote.autodiscovery", 641 "set com.sun.management.jmxremote.autodiscovery", "STRING", false), 642 643 _jdp_port 644 ("jdp.port", 645 "set com.sun.management.jdp.port", "INT", false), 646 647 _jdp_address 648 ("jdp.address", 649 "set com.sun.management.jdp.address", "STRING", false), 650 651 _jdp_source_addr 652 ("jdp.source_addr", 653 "set com.sun.management.jdp.source_addr", "STRING", false), 654 655 _jdp_ttl 656 ("jdp.ttl", 657 "set com.sun.management.jdp.ttl", "INT", false), 658 659 _jdp_pause 660 ("jdp.pause", 661 "set com.sun.management.jdp.pause", "INT", false), 662 663 _jdp_name 664 ("jdp.name", 665 "set com.sun.management.jdp.name", "STRING", false) 666 667 { 668 _dcmdparser.add_dcmd_option(&_config_file); 669 _dcmdparser.add_dcmd_option(&_jmxremote_host); 670 _dcmdparser.add_dcmd_option(&_jmxremote_port); 671 _dcmdparser.add_dcmd_option(&_jmxremote_rmi_port); 672 _dcmdparser.add_dcmd_option(&_jmxremote_ssl); 673 _dcmdparser.add_dcmd_option(&_jmxremote_registry_ssl); 674 _dcmdparser.add_dcmd_option(&_jmxremote_authenticate); 675 _dcmdparser.add_dcmd_option(&_jmxremote_password_file); 676 _dcmdparser.add_dcmd_option(&_jmxremote_access_file); 677 _dcmdparser.add_dcmd_option(&_jmxremote_login_config); 678 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_enabled_cipher_suites); 679 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_enabled_protocols); 680 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_need_client_auth); 681 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_config_file); 682 _dcmdparser.add_dcmd_option(&_jmxremote_autodiscovery); 683 _dcmdparser.add_dcmd_option(&_jdp_port); 684 _dcmdparser.add_dcmd_option(&_jdp_address); 685 _dcmdparser.add_dcmd_option(&_jdp_source_addr); 686 _dcmdparser.add_dcmd_option(&_jdp_ttl); 687 _dcmdparser.add_dcmd_option(&_jdp_pause); 688 _dcmdparser.add_dcmd_option(&_jdp_name); 689 } 690 691 void JMXStartRemoteDCmd::execute(DCmdSource source, TRAPS) { 692 ResourceMark rm(THREAD); 693 HandleMark hm(THREAD); 694 695 // Load and initialize the jdk.internal.agent.Agent class 696 // invoke startRemoteManagementAgent(string) method to start 697 // the remote management server. 698 // throw java.lang.NoSuchMethodError if the method doesn't exist 699 700 loadAgentModule(CHECK); 701 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader()); 702 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::jdk_internal_agent_Agent(), loader, Handle(), true, CHECK); 703 704 JavaValue result(T_VOID); 705 706 // Pass all command line arguments to java as key=value,... 707 // All checks are done on java side 708 709 int len = 0; 710 stringStream options; 711 char comma[2] = {0,0}; 712 713 // Leave default values on Agent.class side and pass only 714 // arguments explicitly set by user. All arguments passed 715 // to jcmd override properties with the same name set by 716 // command line with -D or by managmenent.properties 717 // file. 718 #define PUT_OPTION(a) \ 719 do { \ 720 if ( (a).is_set() ){ \ 721 if ( *((a).type()) == 'I' ) { \ 722 options.print("%scom.sun.management.%s=" JLONG_FORMAT, comma, (a).name(), (jlong)((a).value())); \ 723 } else { \ 724 options.print("%scom.sun.management.%s=%s", comma, (a).name(), (char*)((a).value())); \ 725 } \ 726 comma[0] = ','; \ 727 }\ 728 } while(0); 729 730 731 PUT_OPTION(_config_file); 732 PUT_OPTION(_jmxremote_host); 733 PUT_OPTION(_jmxremote_port); 734 PUT_OPTION(_jmxremote_rmi_port); 735 PUT_OPTION(_jmxremote_ssl); 736 PUT_OPTION(_jmxremote_registry_ssl); 737 PUT_OPTION(_jmxremote_authenticate); 738 PUT_OPTION(_jmxremote_password_file); 739 PUT_OPTION(_jmxremote_access_file); 740 PUT_OPTION(_jmxremote_login_config); 741 PUT_OPTION(_jmxremote_ssl_enabled_cipher_suites); 742 PUT_OPTION(_jmxremote_ssl_enabled_protocols); 743 PUT_OPTION(_jmxremote_ssl_need_client_auth); 744 PUT_OPTION(_jmxremote_ssl_config_file); 745 PUT_OPTION(_jmxremote_autodiscovery); 746 PUT_OPTION(_jdp_port); 747 PUT_OPTION(_jdp_address); 748 PUT_OPTION(_jdp_source_addr); 749 PUT_OPTION(_jdp_ttl); 750 PUT_OPTION(_jdp_pause); 751 PUT_OPTION(_jdp_name); 752 753 #undef PUT_OPTION 754 755 Handle str = java_lang_String::create_from_str(options.as_string(), CHECK); 756 JavaCalls::call_static(&result, k, vmSymbols::startRemoteAgent_name(), vmSymbols::string_void_signature(), str, CHECK); 757 } 758 759 JMXStartLocalDCmd::JMXStartLocalDCmd(outputStream *output, bool heap_allocated) : 760 DCmd(output, heap_allocated) { 761 // do nothing 762 } 763 764 void JMXStartLocalDCmd::execute(DCmdSource source, TRAPS) { 765 ResourceMark rm(THREAD); 766 HandleMark hm(THREAD); 767 768 // Load and initialize the jdk.internal.agent.Agent class 769 // invoke startLocalManagementAgent(void) method to start 770 // the local management server 771 // throw java.lang.NoSuchMethodError if method doesn't exist 772 773 loadAgentModule(CHECK); 774 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader()); 775 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::jdk_internal_agent_Agent(), loader, Handle(), true, CHECK); 776 777 JavaValue result(T_VOID); 778 JavaCalls::call_static(&result, k, vmSymbols::startLocalAgent_name(), vmSymbols::void_method_signature(), CHECK); 779 } 780 781 void JMXStopRemoteDCmd::execute(DCmdSource source, TRAPS) { 782 ResourceMark rm(THREAD); 783 HandleMark hm(THREAD); 784 785 // Load and initialize the jdk.internal.agent.Agent class 786 // invoke stopRemoteManagementAgent method to stop the 787 // management server 788 // throw java.lang.NoSuchMethodError if method doesn't exist 789 790 loadAgentModule(CHECK); 791 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader()); 792 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::jdk_internal_agent_Agent(), loader, Handle(), true, CHECK); 793 794 JavaValue result(T_VOID); 795 JavaCalls::call_static(&result, k, vmSymbols::stopRemoteAgent_name(), vmSymbols::void_method_signature(), CHECK); 796 } 797 798 JMXStatusDCmd::JMXStatusDCmd(outputStream *output, bool heap_allocated) : 799 DCmd(output, heap_allocated) { 800 // do nothing 801 } 802 803 void JMXStatusDCmd::execute(DCmdSource source, TRAPS) { 804 ResourceMark rm(THREAD); 805 HandleMark hm(THREAD); 806 807 // Load and initialize the jdk.internal.agent.Agent class 808 // invoke getManagementAgentStatus() method to generate the status info 809 // throw java.lang.NoSuchMethodError if method doesn't exist 810 811 loadAgentModule(CHECK); 812 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader()); 813 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::jdk_internal_agent_Agent(), loader, Handle(), true, CHECK); 814 815 JavaValue result(T_OBJECT); 816 JavaCalls::call_static(&result, k, vmSymbols::getAgentStatus_name(), vmSymbols::void_string_signature(), CHECK); 817 818 jvalue* jv = (jvalue*) result.get_value_addr(); 819 oop str = cast_to_oop(jv->l); 820 if (str != nullptr) { 821 char* out = java_lang_String::as_utf8_string(str); 822 if (out) { 823 // Avoid using print_cr() because length maybe longer than O_BUFLEN 824 output()->print_raw_cr(out); 825 return; 826 } 827 } 828 output()->print_cr("Error obtaining management agent status"); 829 } 830 831 VMDynamicLibrariesDCmd::VMDynamicLibrariesDCmd(outputStream *output, bool heap_allocated) : 832 DCmd(output, heap_allocated) { 833 // do nothing 834 } 835 836 void VMDynamicLibrariesDCmd::execute(DCmdSource source, TRAPS) { 837 os::print_dll_info(output()); 838 output()->cr(); 839 } 840 841 void CompileQueueDCmd::execute(DCmdSource source, TRAPS) { 842 VM_PrintCompileQueue printCompileQueueOp(output()); 843 VMThread::execute(&printCompileQueueOp); 844 } 845 846 void CodeListDCmd::execute(DCmdSource source, TRAPS) { 847 CodeCache::print_codelist(output()); 848 } 849 850 void CodeCacheDCmd::execute(DCmdSource source, TRAPS) { 851 CodeCache::print_layout(output()); 852 } 853 854 #ifdef LINUX 855 #define DEFAULT_PERFMAP_FILENAME "/tmp/perf-<pid>.map" 856 857 PerfMapDCmd::PerfMapDCmd(outputStream* output, bool heap) : 858 DCmdWithParser(output, heap), 859 _filename("filename", "Name of the map file", "STRING", false, DEFAULT_PERFMAP_FILENAME) 860 { 861 _dcmdparser.add_dcmd_argument(&_filename); 862 } 863 864 void PerfMapDCmd::execute(DCmdSource source, TRAPS) { 865 // The check for _filename.is_set() is because we don't want to use 866 // DEFAULT_PERFMAP_FILENAME, since it is meant as a description 867 // of the default, not the actual default. 868 CodeCache::write_perf_map(_filename.is_set() ? _filename.value() : nullptr); 869 } 870 #endif // LINUX 871 872 //---< BEGIN >--- CodeHeap State Analytics. 873 CodeHeapAnalyticsDCmd::CodeHeapAnalyticsDCmd(outputStream* output, bool heap) : 874 DCmdWithParser(output, heap), 875 _function("function", "Function to be performed (aggregate, UsedSpace, FreeSpace, MethodCount, MethodSpace, MethodAge, MethodNames, discard", "STRING", false, "all"), 876 _granularity("granularity", "Detail level - smaller value -> more detail", "INT", false, "4096") { 877 _dcmdparser.add_dcmd_argument(&_function); 878 _dcmdparser.add_dcmd_argument(&_granularity); 879 } 880 881 void CodeHeapAnalyticsDCmd::execute(DCmdSource source, TRAPS) { 882 jlong granularity = _granularity.value(); 883 if (granularity < 1) { 884 Exceptions::fthrow(THREAD_AND_LOCATION, vmSymbols::java_lang_IllegalArgumentException(), 885 "Invalid granularity value " JLONG_FORMAT ". Should be positive.\n", granularity); 886 return; 887 } 888 889 CompileBroker::print_heapinfo(output(), _function.value(), granularity); 890 } 891 //---< END >--- CodeHeap State Analytics. 892 893 EventLogDCmd::EventLogDCmd(outputStream* output, bool heap) : 894 DCmdWithParser(output, heap), 895 _log("log", "Name of log to be printed. If omitted, all logs are printed.", "STRING", false, nullptr), 896 _max("max", "Maximum number of events to be printed (newest first). If omitted, all events are printed.", "STRING", false, nullptr) 897 { 898 _dcmdparser.add_dcmd_option(&_log); 899 _dcmdparser.add_dcmd_option(&_max); 900 } 901 902 void EventLogDCmd::execute(DCmdSource source, TRAPS) { 903 const char* max_value = _max.value(); 904 int max = -1; 905 if (max_value != nullptr) { 906 char* endptr = nullptr; 907 int max; 908 if (!parse_integer(max_value, &max)) { 909 output()->print_cr("Invalid max option: \"%s\".", max_value); 910 return; 911 } 912 } 913 const char* log_name = _log.value(); 914 if (log_name != nullptr) { 915 Events::print_one(output(), log_name, max); 916 } else { 917 Events::print_all(output(), max); 918 } 919 } 920 921 void CompilerDirectivesPrintDCmd::execute(DCmdSource source, TRAPS) { 922 DirectivesStack::print(output()); 923 } 924 925 CompilerDirectivesAddDCmd::CompilerDirectivesAddDCmd(outputStream* output, bool heap) : 926 DCmdWithParser(output, heap), 927 _filename("filename", "Name of the directives file", "STRING", true), 928 _refresh("-r", "Refresh affected methods", "BOOLEAN", false, "false") { 929 930 _dcmdparser.add_dcmd_argument(&_filename); 931 _dcmdparser.add_dcmd_option(&_refresh); 932 } 933 934 void CompilerDirectivesAddDCmd::execute(DCmdSource source, TRAPS) { 935 DirectivesParser::parse_from_file(_filename.value(), output(), true); 936 if (_refresh.value()) { 937 CodeCache::mark_directives_matches(true); 938 CodeCache::recompile_marked_directives_matches(); 939 } 940 } 941 942 CompilerDirectivesReplaceDCmd::CompilerDirectivesReplaceDCmd(outputStream* output, bool heap) : 943 DCmdWithParser(output, heap), 944 _filename("filename", "Name of the directives file", "STRING", true), 945 _refresh("-r", "Refresh affected methods", "BOOLEAN", false, "false") { 946 947 _dcmdparser.add_dcmd_argument(&_filename); 948 _dcmdparser.add_dcmd_option(&_refresh); 949 } 950 951 void CompilerDirectivesReplaceDCmd::execute(DCmdSource source, TRAPS) { 952 // Need to mark the methods twice, to account for the method that doesn't match 953 // the directives anymore 954 if (_refresh.value()) { 955 CodeCache::mark_directives_matches(); 956 957 DirectivesStack::clear(); 958 DirectivesParser::parse_from_file(_filename.value(), output(), true); 959 960 CodeCache::mark_directives_matches(); 961 CodeCache::recompile_marked_directives_matches(); 962 } else { 963 DirectivesStack::clear(); 964 DirectivesParser::parse_from_file(_filename.value(), output(), true); 965 } 966 } 967 968 CompilerDirectivesRemoveDCmd::CompilerDirectivesRemoveDCmd(outputStream* output, bool heap) : 969 DCmdWithParser(output, heap), 970 _refresh("-r", "Refresh affected methods", "BOOLEAN", false, "false") { 971 972 _dcmdparser.add_dcmd_option(&_refresh); 973 } 974 975 void CompilerDirectivesRemoveDCmd::execute(DCmdSource source, TRAPS) { 976 if (_refresh.value()) { 977 CodeCache::mark_directives_matches(true); 978 DirectivesStack::pop(1); 979 CodeCache::recompile_marked_directives_matches(); 980 } else { 981 DirectivesStack::pop(1); 982 } 983 } 984 985 CompilerDirectivesClearDCmd::CompilerDirectivesClearDCmd(outputStream* output, bool heap) : 986 DCmdWithParser(output, heap), 987 _refresh("-r", "Refresh affected methods", "BOOLEAN", false, "false") { 988 989 _dcmdparser.add_dcmd_option(&_refresh); 990 } 991 992 void CompilerDirectivesClearDCmd::execute(DCmdSource source, TRAPS) { 993 if (_refresh.value()) { 994 CodeCache::mark_directives_matches(); 995 DirectivesStack::clear(); 996 CodeCache::recompile_marked_directives_matches(); 997 } else { 998 DirectivesStack::clear(); 999 } 1000 } 1001 1002 #if INCLUDE_SERVICES 1003 ClassHierarchyDCmd::ClassHierarchyDCmd(outputStream* output, bool heap) : 1004 DCmdWithParser(output, heap), 1005 _print_interfaces("-i", "Inherited interfaces should be printed.", "BOOLEAN", false, "false"), 1006 _print_subclasses("-s", "If a classname is specified, print its subclasses " 1007 "in addition to its superclasses. Without this option only the " 1008 "superclasses will be printed.", "BOOLEAN", false, "false"), 1009 _classname("classname", "Name of class whose hierarchy should be printed. " 1010 "If not specified, all class hierarchies are printed.", 1011 "STRING", false) { 1012 _dcmdparser.add_dcmd_option(&_print_interfaces); 1013 _dcmdparser.add_dcmd_option(&_print_subclasses); 1014 _dcmdparser.add_dcmd_argument(&_classname); 1015 } 1016 1017 void ClassHierarchyDCmd::execute(DCmdSource source, TRAPS) { 1018 VM_PrintClassHierarchy printClassHierarchyOp(output(), _print_interfaces.value(), 1019 _print_subclasses.value(), _classname.value()); 1020 VMThread::execute(&printClassHierarchyOp); 1021 } 1022 #endif 1023 1024 ClassesDCmd::ClassesDCmd(outputStream* output, bool heap) : 1025 DCmdWithParser(output, heap), 1026 _verbose("-verbose", 1027 "Dump the detailed content of a Java class. " 1028 "Some classes are annotated with flags: " 1029 "F = has, or inherits, a non-empty finalize method, " 1030 "f = has final method, " 1031 "W = methods rewritten, " 1032 "C = marked with @Contended annotation, " 1033 "R = has been redefined, " 1034 "S = is shared class", 1035 "BOOLEAN", false, "false") { 1036 _dcmdparser.add_dcmd_option(&_verbose); 1037 } 1038 1039 class VM_PrintClasses : public VM_Operation { 1040 private: 1041 outputStream* _out; 1042 bool _verbose; 1043 public: 1044 VM_PrintClasses(outputStream* out, bool verbose) : _out(out), _verbose(verbose) {} 1045 1046 virtual VMOp_Type type() const { return VMOp_PrintClasses; } 1047 1048 virtual void doit() { 1049 PrintClassClosure closure(_out, _verbose); 1050 ClassLoaderDataGraph::classes_do(&closure); 1051 } 1052 }; 1053 1054 void ClassesDCmd::execute(DCmdSource source, TRAPS) { 1055 VM_PrintClasses vmop(output(), _verbose.is_set()); 1056 VMThread::execute(&vmop); 1057 } 1058 1059 #if INCLUDE_CDS 1060 #define DEFAULT_CDS_ARCHIVE_FILENAME "java_pid<pid>_<subcmd>.jsa" 1061 1062 DumpSharedArchiveDCmd::DumpSharedArchiveDCmd(outputStream* output, bool heap) : 1063 DCmdWithParser(output, heap), 1064 _suboption("subcmd", "static_dump | dynamic_dump", "STRING", true), 1065 _filename("filename", "Name of shared archive to be dumped", "STRING", false, 1066 DEFAULT_CDS_ARCHIVE_FILENAME) 1067 { 1068 _dcmdparser.add_dcmd_argument(&_suboption); 1069 _dcmdparser.add_dcmd_argument(&_filename); 1070 } 1071 1072 void DumpSharedArchiveDCmd::execute(DCmdSource source, TRAPS) { 1073 jboolean is_static; 1074 const char* scmd = _suboption.value(); 1075 1076 // The check for _filename.is_set() is because we don't want to use 1077 // DEFAULT_CDS_ARCHIVE_FILENAME, since it is meant as a description 1078 // of the default, not the actual default. 1079 const char* file = _filename.is_set() ? _filename.value() : nullptr; 1080 1081 if (strcmp(scmd, "static_dump") == 0) { 1082 is_static = JNI_TRUE; 1083 output()->print("Static dump: "); 1084 } else if (strcmp(scmd, "dynamic_dump") == 0) { 1085 is_static = JNI_FALSE; 1086 output()->print("Dynamic dump: "); 1087 if (!UseSharedSpaces) { 1088 output()->print_cr("Dynamic dump is unsupported when base CDS archive is not loaded"); 1089 return; 1090 } 1091 if (!RecordDynamicDumpInfo) { 1092 output()->print_cr("Dump dynamic should run with -XX:+RecordDynamicDumpInfo"); 1093 return; 1094 } 1095 } else { 1096 output()->print_cr("Invalid command for VM.cds, valid input is static_dump or dynamic_dump"); 1097 return; 1098 } 1099 1100 // call CDS.dumpSharedArchive 1101 Handle fileh; 1102 if (file != nullptr) { 1103 fileh = java_lang_String::create_from_str(_filename.value(), CHECK); 1104 } 1105 Symbol* cds_name = vmSymbols::jdk_internal_misc_CDS(); 1106 Klass* cds_klass = SystemDictionary::resolve_or_fail(cds_name, true /*throw error*/, CHECK); 1107 JavaValue result(T_OBJECT); 1108 JavaCallArguments args; 1109 args.push_int(is_static); 1110 args.push_oop(fileh); 1111 JavaCalls::call_static(&result, 1112 cds_klass, 1113 vmSymbols::dumpSharedArchive(), 1114 vmSymbols::dumpSharedArchive_signature(), 1115 &args, CHECK); 1116 if (!HAS_PENDING_EXCEPTION) { 1117 assert(result.get_type() == T_OBJECT, "Sanity check"); 1118 // result contains the archive name 1119 char* archive_name = java_lang_String::as_utf8_string(result.get_oop()); 1120 output()->print_cr("%s", archive_name); 1121 } 1122 } 1123 #endif // INCLUDE_CDS 1124 1125 #if INCLUDE_JVMTI 1126 extern "C" typedef char const* (JNICALL *debugInit_startDebuggingViaCommandPtr)(JNIEnv* env, jthread thread, char const** transport_name, 1127 char const** address, jboolean* first_start); 1128 static debugInit_startDebuggingViaCommandPtr dvc_start_ptr = nullptr; 1129 1130 void DebugOnCmdStartDCmd::execute(DCmdSource source, TRAPS) { 1131 char const* transport = nullptr; 1132 char const* addr = nullptr; 1133 jboolean is_first_start = JNI_FALSE; 1134 JavaThread* thread = THREAD; 1135 jthread jt = JNIHandles::make_local(thread->threadObj()); 1136 ThreadToNativeFromVM ttn(thread); 1137 const char *error = "Could not find jdwp agent."; 1138 1139 if (!dvc_start_ptr) { 1140 JvmtiAgentList::Iterator it = JvmtiAgentList::agents(); 1141 while (it.has_next()) { 1142 JvmtiAgent* agent = it.next(); 1143 if ((strcmp("jdwp", agent->name()) == 0) && (dvc_start_ptr == nullptr)) { 1144 char const* func = "debugInit_startDebuggingViaCommand"; 1145 dvc_start_ptr = (debugInit_startDebuggingViaCommandPtr) os::find_agent_function(agent, false, &func, 1); 1146 } 1147 } 1148 } 1149 1150 if (dvc_start_ptr) { 1151 error = dvc_start_ptr(thread->jni_environment(), jt, &transport, &addr, &is_first_start); 1152 } 1153 1154 if (error != nullptr) { 1155 output()->print_cr("Debugging has not been started: %s", error); 1156 } else { 1157 output()->print_cr(is_first_start ? "Debugging has been started." : "Debugging is already active."); 1158 output()->print_cr("Transport : %s", transport ? transport : "#unknown"); 1159 output()->print_cr("Address : %s", addr ? addr : "#unknown"); 1160 } 1161 } 1162 #endif // INCLUDE_JVMTI 1163 1164 ThreadDumpToFileDCmd::ThreadDumpToFileDCmd(outputStream* output, bool heap) : 1165 DCmdWithParser(output, heap), 1166 _overwrite("-overwrite", "May overwrite existing file", "BOOLEAN", false, "false"), 1167 _format("-format", "Output format (\"plain\" or \"json\")", "STRING", false, "plain"), 1168 _filepath("filepath", "The file path to the output file", "STRING", true) { 1169 _dcmdparser.add_dcmd_option(&_overwrite); 1170 _dcmdparser.add_dcmd_option(&_format); 1171 _dcmdparser.add_dcmd_argument(&_filepath); 1172 } 1173 1174 void ThreadDumpToFileDCmd::execute(DCmdSource source, TRAPS) { 1175 bool json = (_format.value() != nullptr) && (strcmp(_format.value(), "json") == 0); 1176 char* path = _filepath.value(); 1177 bool overwrite = _overwrite.value(); 1178 Symbol* name = (json) ? vmSymbols::dumpThreadsToJson_name() : vmSymbols::dumpThreads_name(); 1179 dumpToFile(name, vmSymbols::string_bool_byte_array_signature(), path, overwrite, CHECK); 1180 } 1181 1182 void ThreadDumpToFileDCmd::dumpToFile(Symbol* name, Symbol* signature, const char* path, bool overwrite, TRAPS) { 1183 ResourceMark rm(THREAD); 1184 HandleMark hm(THREAD); 1185 1186 Handle h_path = java_lang_String::create_from_str(path, CHECK); 1187 1188 Symbol* sym = vmSymbols::jdk_internal_vm_ThreadDumper(); 1189 Klass* k = SystemDictionary::resolve_or_fail(sym, true, CHECK); 1190 InstanceKlass* ik = InstanceKlass::cast(k); 1191 if (HAS_PENDING_EXCEPTION) { 1192 java_lang_Throwable::print(PENDING_EXCEPTION, output()); 1193 output()->cr(); 1194 CLEAR_PENDING_EXCEPTION; 1195 return; 1196 } 1197 1198 // invoke the ThreadDump method to dump to file 1199 JavaValue result(T_OBJECT); 1200 JavaCallArguments args; 1201 args.push_oop(h_path); 1202 args.push_int(overwrite ? JNI_TRUE : JNI_FALSE); 1203 JavaCalls::call_static(&result, 1204 k, 1205 name, 1206 signature, 1207 &args, 1208 THREAD); 1209 if (HAS_PENDING_EXCEPTION) { 1210 java_lang_Throwable::print(PENDING_EXCEPTION, output()); 1211 output()->cr(); 1212 CLEAR_PENDING_EXCEPTION; 1213 return; 1214 } 1215 1216 // check that result is byte array 1217 oop res = cast_to_oop(result.get_jobject()); 1218 assert(res->is_typeArray(), "just checking"); 1219 assert(TypeArrayKlass::cast(res->klass())->element_type() == T_BYTE, "just checking"); 1220 1221 // copy the bytes to the output stream 1222 typeArrayOop ba = typeArrayOop(res); 1223 jbyte* addr = typeArrayOop(res)->byte_at_addr(0); 1224 output()->print_raw((const char*)addr, ba->length()); 1225 } 1226 1227 CompilationMemoryStatisticDCmd::CompilationMemoryStatisticDCmd(outputStream* output, bool heap) : 1228 DCmdWithParser(output, heap), 1229 _human_readable("-H", "Human readable format", "BOOLEAN", false, "false"), 1230 _minsize("-s", "Minimum memory size", "MEMORY SIZE", false, "0") { 1231 _dcmdparser.add_dcmd_option(&_human_readable); 1232 _dcmdparser.add_dcmd_option(&_minsize); 1233 } 1234 1235 void CompilationMemoryStatisticDCmd::execute(DCmdSource source, TRAPS) { 1236 const bool human_readable = _human_readable.value(); 1237 const size_t minsize = _minsize.has_value() ? _minsize.value()._size : 0; 1238 CompilationMemoryStatistic::print_all_by_size(output(), human_readable, minsize); 1239 } 1240 1241 #ifdef LINUX 1242 1243 SystemMapDCmd::SystemMapDCmd(outputStream* output, bool heap) : 1244 DCmdWithParser(output, heap), 1245 _human_readable("-H", "Human readable format", "BOOLEAN", false, "false") { 1246 _dcmdparser.add_dcmd_option(&_human_readable); 1247 } 1248 1249 void SystemMapDCmd::execute(DCmdSource source, TRAPS) { 1250 MemMapPrinter::print_all_mappings(output(), _human_readable.value()); 1251 } 1252 1253 SystemDumpMapDCmd::SystemDumpMapDCmd(outputStream* output, bool heap) : 1254 DCmdWithParser(output, heap), 1255 _human_readable("-H", "Human readable format", "BOOLEAN", false, "false"), 1256 _filename("-F", "file path (defaults: \"vm_memory_map_<pid>.txt\")", "STRING", false) { 1257 _dcmdparser.add_dcmd_option(&_human_readable); 1258 _dcmdparser.add_dcmd_option(&_filename); 1259 } 1260 1261 void SystemDumpMapDCmd::execute(DCmdSource source, TRAPS) { 1262 stringStream default_name; 1263 default_name.print("vm_memory_map_%d.txt", os::current_process_id()); 1264 const char* name = _filename.is_set() ? _filename.value() : default_name.base(); 1265 fileStream fs(name); 1266 if (fs.is_open()) { 1267 if (!MemTracker::enabled()) { 1268 output()->print_cr("(NMT is disabled, will not annotate mappings)."); 1269 } 1270 MemMapPrinter::print_all_mappings(&fs, _human_readable.value()); 1271 // For the readers convenience, resolve path name. 1272 char tmp[JVM_MAXPATHLEN]; 1273 const char* absname = os::Posix::realpath(name, tmp, sizeof(tmp)); 1274 name = absname != nullptr ? absname : name; 1275 output()->print_cr("Memory map dumped to \"%s\".", name); 1276 } else { 1277 output()->print_cr("Failed to open \"%s\" for writing (%s).", name, os::strerror(errno)); 1278 } 1279 } 1280 1281 #endif // LINUX