1 /* 2 * Copyright (c) 2011, 2025, 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 "cds/cds_globals.hpp" 26 #include "cds/cdsConfig.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/compileBroker.hpp" 36 #include "compiler/compiler_globals.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/metaspaceUtils.hpp" 42 #include "memory/resourceArea.hpp" 43 #include "memory/universe.hpp" 44 #include "nmt/memMapPrinter.hpp" 45 #include "nmt/memTracker.hpp" 46 #include "nmt/nmtDCmd.hpp" 47 #include "oops/instanceKlass.hpp" 48 #include "oops/objArrayOop.inline.hpp" 49 #include "oops/oop.inline.hpp" 50 #include "oops/typeArrayOop.inline.hpp" 51 #include "prims/jvmtiAgentList.hpp" 52 #include "runtime/fieldDescriptor.inline.hpp" 53 #include "runtime/flags/jvmFlag.hpp" 54 #include "runtime/handles.inline.hpp" 55 #include "runtime/javaCalls.hpp" 56 #include "runtime/jniHandles.hpp" 57 #include "runtime/os.hpp" 58 #include "runtime/vm_version.hpp" 59 #include "runtime/vmOperations.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 "mallocInfoDcmd.hpp" 73 #include "os_posix.hpp" 74 #include "trimCHeapDCmd.hpp" 75 76 #include <errno.h> 77 #endif 78 79 static void loadAgentModule(TRAPS) { 80 ResourceMark rm(THREAD); 81 HandleMark hm(THREAD); 82 83 JavaValue result(T_OBJECT); 84 Handle h_module_name = java_lang_String::create_from_str("jdk.management.agent", CHECK); 85 JavaCalls::call_static(&result, 86 vmClasses::module_Modules_klass(), 87 vmSymbols::loadModule_name(), 88 vmSymbols::loadModule_signature(), 89 h_module_name, 90 THREAD); 91 } 92 93 void DCmd::register_dcmds(){ 94 // Registration of the diagnostic commands 95 // First argument specifies which interfaces will export the command 96 // Second argument specifies if the command is enabled 97 // Third argument specifies if the command is hidden 98 uint32_t full_export = DCmd_Source_Internal | DCmd_Source_AttachAPI 99 | DCmd_Source_MBean; 100 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<HelpDCmd>(full_export, true, false)); 101 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VersionDCmd>(full_export, true, false)); 102 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CommandLineDCmd>(full_export, true, false)); 103 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<PrintSystemPropertiesDCmd>(full_export, true, false)); 104 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<PrintVMFlagsDCmd>(full_export, true, false)); 105 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SetVMFlagDCmd>(full_export, true, false)); 106 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VMDynamicLibrariesDCmd>(full_export, true, false)); 107 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VMUptimeDCmd>(full_export, true, false)); 108 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VMInfoDCmd>(full_export, true, false)); 109 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SystemGCDCmd>(full_export, true, false)); 110 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<RunFinalizationDCmd>(full_export, true, false)); 111 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<HeapInfoDCmd>(full_export, true, false)); 112 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<FinalizerInfoDCmd>(full_export, true, false)); 113 #if INCLUDE_SERVICES 114 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<HeapDumpDCmd>(DCmd_Source_Internal | DCmd_Source_AttachAPI, true, false)); 115 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassHistogramDCmd>(full_export, true, false)); 116 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SystemDictionaryDCmd>(full_export, true, false)); 117 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassHierarchyDCmd>(full_export, true, false)); 118 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassesDCmd>(full_export, true, false)); 119 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SymboltableDCmd>(full_export, true, false)); 120 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<StringtableDCmd>(full_export, true, false)); 121 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<metaspace::MetaspaceDCmd>(full_export, true, false)); 122 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<PrintClassLayoutDCmd>(full_export, true, false)); 123 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<EventLogDCmd>(full_export, true, false)); 124 #if INCLUDE_JVMTI // Both JVMTI and SERVICES have to be enabled to have this dcmd 125 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JVMTIAgentLoadDCmd>(full_export, true, false)); 126 #endif // INCLUDE_JVMTI 127 #endif // INCLUDE_SERVICES 128 #if INCLUDE_JVMTI 129 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JVMTIDataDumpDCmd>(full_export, true, false)); 130 #endif // INCLUDE_JVMTI 131 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ThreadDumpDCmd>(full_export, true, false)); 132 #if INCLUDE_JVMTI 133 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ThreadDumpToFileDCmd>(full_export, true, false)); 134 #endif // INCLUDE_JVMTI 135 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VThreadSchedulerDCmd>(full_export, true, false)); 136 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VThreadPollersDCmd>(full_export, true, false)); 137 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassLoaderStatsDCmd>(full_export, true, false)); 138 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassLoaderHierarchyDCmd>(full_export, true, false)); 139 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompileQueueDCmd>(full_export, true, false)); 140 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CodeListDCmd>(full_export, true, false)); 141 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CodeCacheDCmd>(full_export, true, false)); 142 #ifdef LINUX 143 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<PerfMapDCmd>(full_export, true, false)); 144 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<TrimCLibcHeapDCmd>(full_export, true, false)); 145 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<MallocInfoDcmd>(full_export, true, false)); 146 #endif // LINUX 147 #if defined(LINUX) || defined(_WIN64) || defined(__APPLE__) 148 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SystemMapDCmd>(full_export, true,false)); 149 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SystemDumpMapDCmd>(full_export, true,false)); 150 #endif // LINUX or WINDOWS or MacOS 151 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CodeHeapAnalyticsDCmd>(full_export, true, false)); 152 153 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesPrintDCmd>(full_export, true, false)); 154 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesAddDCmd>(full_export, true, false)); 155 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesRemoveDCmd>(full_export, true, false)); 156 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesClearDCmd>(full_export, true, false)); 157 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilationMemoryStatisticDCmd>(full_export, true, false)); 158 159 // Enhanced JMX Agent Support 160 // These commands not currently exported via the DiagnosticCommandMBean 161 uint32_t jmx_agent_export_flags = DCmd_Source_Internal | DCmd_Source_AttachAPI; 162 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStartRemoteDCmd>(jmx_agent_export_flags, true,false)); 163 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStartLocalDCmd>(jmx_agent_export_flags, true,false)); 164 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStopRemoteDCmd>(jmx_agent_export_flags, true,false)); 165 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStatusDCmd>(jmx_agent_export_flags, true,false)); 166 167 #if INCLUDE_CDS 168 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<DumpSharedArchiveDCmd>(full_export, true, false)); 169 #endif // INCLUDE_CDS 170 171 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<NMTDCmd>(full_export, true, false)); 172 } 173 174 HelpDCmd::HelpDCmd(outputStream* output, bool heap) : DCmdWithParser(output, heap), 175 _all("-all", "Show help for all commands", "BOOLEAN", false, "false"), 176 _cmd("command name", "The name of the command for which we want help", 177 "STRING", false) { 178 _dcmdparser.add_dcmd_option(&_all); 179 _dcmdparser.add_dcmd_argument(&_cmd); 180 }; 181 182 183 static int compare_strings(const char** s1, const char** s2) { 184 return ::strcmp(*s1, *s2); 185 } 186 187 void HelpDCmd::execute(DCmdSource source, TRAPS) { 188 if (_all.value()) { 189 GrowableArray<const char*>* cmd_list = DCmdFactory::DCmd_list(source); 190 cmd_list->sort(compare_strings); 191 for (int i = 0; i < cmd_list->length(); i++) { 192 DCmdFactory* factory = DCmdFactory::factory(source, cmd_list->at(i), 193 strlen(cmd_list->at(i))); 194 output()->print_cr("%s%s", factory->name(), 195 factory->is_enabled() ? "" : " [disabled]"); 196 output()->print_cr("\t%s", factory->description()); 197 output()->cr(); 198 factory = factory->next(); 199 } 200 } else if (_cmd.has_value()) { 201 DCmd* cmd = nullptr; 202 DCmdFactory* factory = DCmdFactory::factory(source, _cmd.value(), 203 strlen(_cmd.value())); 204 if (factory != nullptr) { 205 output()->print_cr("%s%s", factory->name(), 206 factory->is_enabled() ? "" : " [disabled]"); 207 output()->print_cr("%s", factory->description()); 208 output()->print_cr("\nImpact: %s", factory->impact()); 209 output()->cr(); 210 cmd = factory->create_resource_instance(output()); 211 if (cmd != nullptr) { 212 DCmdMark mark(cmd); 213 cmd->print_help(factory->name()); 214 } 215 } else { 216 output()->print_cr("Help unavailable : '%s' : No such command", _cmd.value()); 217 } 218 } else { 219 output()->print_cr("The following commands are available:"); 220 GrowableArray<const char *>* cmd_list = DCmdFactory::DCmd_list(source); 221 cmd_list->sort(compare_strings); 222 for (int i = 0; i < cmd_list->length(); i++) { 223 DCmdFactory* factory = DCmdFactory::factory(source, cmd_list->at(i), 224 strlen(cmd_list->at(i))); 225 output()->print_cr("%s%s", factory->name(), 226 factory->is_enabled() ? "" : " [disabled]"); 227 factory = factory->_next; 228 } 229 output()->print_cr("\nFor more information about a specific command use 'help <command>'."); 230 } 231 } 232 233 void VersionDCmd::execute(DCmdSource source, TRAPS) { 234 output()->print_cr("%s version %s", VM_Version::vm_name(), 235 VM_Version::vm_release()); 236 JDK_Version jdk_version = JDK_Version::current(); 237 if (jdk_version.patch_version() > 0) { 238 output()->print_cr("JDK %d.%d.%d.%d", jdk_version.major_version(), 239 jdk_version.minor_version(), jdk_version.security_version(), 240 jdk_version.patch_version()); 241 } else { 242 output()->print_cr("JDK %d.%d.%d", jdk_version.major_version(), 243 jdk_version.minor_version(), jdk_version.security_version()); 244 } 245 } 246 247 PrintVMFlagsDCmd::PrintVMFlagsDCmd(outputStream* output, bool heap) : 248 DCmdWithParser(output, heap), 249 _all("-all", "Print all flags supported by the VM", "BOOLEAN", false, "false") { 250 _dcmdparser.add_dcmd_option(&_all); 251 } 252 253 void PrintVMFlagsDCmd::execute(DCmdSource source, TRAPS) { 254 if (_all.value()) { 255 JVMFlag::printFlags(output(), true); 256 } else { 257 JVMFlag::printSetFlags(output()); 258 } 259 } 260 261 SetVMFlagDCmd::SetVMFlagDCmd(outputStream* output, bool heap) : 262 DCmdWithParser(output, heap), 263 _flag("flag name", "The name of the flag we want to set", 264 "STRING", true), 265 _value("string value", "The value we want to set", "STRING", false) { 266 _dcmdparser.add_dcmd_argument(&_flag); 267 _dcmdparser.add_dcmd_argument(&_value); 268 } 269 270 void SetVMFlagDCmd::execute(DCmdSource source, TRAPS) { 271 const char* val = nullptr; 272 if (_value.value() != nullptr) { 273 val = _value.value(); 274 } 275 276 FormatBuffer<80> err_msg("%s", ""); 277 int ret = WriteableFlags::set_flag(_flag.value(), val, JVMFlagOrigin::MANAGEMENT, err_msg); 278 279 if (ret != JVMFlag::SUCCESS) { 280 output()->print_cr("%s", err_msg.buffer()); 281 } 282 } 283 284 void JVMTIDataDumpDCmd::execute(DCmdSource source, TRAPS) { 285 if (JvmtiExport::should_post_data_dump()) { 286 JvmtiExport::post_data_dump(); 287 } 288 } 289 290 #if INCLUDE_SERVICES 291 #if INCLUDE_JVMTI 292 JVMTIAgentLoadDCmd::JVMTIAgentLoadDCmd(outputStream* output, bool heap) : 293 DCmdWithParser(output, heap), 294 _libpath("library path", "Absolute path of the JVMTI agent to load.", 295 "STRING", true), 296 _option("agent option", "Option string to pass the agent.", "STRING", false) { 297 _dcmdparser.add_dcmd_argument(&_libpath); 298 _dcmdparser.add_dcmd_argument(&_option); 299 } 300 301 void JVMTIAgentLoadDCmd::execute(DCmdSource source, TRAPS) { 302 303 if (_libpath.value() == nullptr) { 304 output()->print_cr("JVMTI.agent_load dcmd needs library path."); 305 return; 306 } 307 308 char *suffix = strrchr(_libpath.value(), '.'); 309 bool is_java_agent = (suffix != nullptr) && (strncmp(".jar", suffix, 4) == 0); 310 311 if (is_java_agent) { 312 if (_option.value() == nullptr) { 313 JvmtiAgentList::load_agent("instrument", false, _libpath.value(), output()); 314 } else { 315 size_t opt_len = strlen(_libpath.value()) + strlen(_option.value()) + 2; 316 if (opt_len > 4096) { 317 output()->print_cr("JVMTI agent attach failed: Options is too long."); 318 return; 319 } 320 321 char *opt = (char *)os::malloc(opt_len, mtInternal); 322 if (opt == nullptr) { 323 output()->print_cr("JVMTI agent attach failed: " 324 "Could not allocate %zu bytes for argument.", 325 opt_len); 326 return; 327 } 328 329 jio_snprintf(opt, opt_len, "%s=%s", _libpath.value(), _option.value()); 330 JvmtiAgentList::load_agent("instrument", false, opt, output()); 331 332 os::free(opt); 333 } 334 } else { 335 JvmtiAgentList::load_agent(_libpath.value(), true, _option.value(), output()); 336 } 337 } 338 339 #endif // INCLUDE_JVMTI 340 #endif // INCLUDE_SERVICES 341 342 void PrintSystemPropertiesDCmd::execute(DCmdSource source, TRAPS) { 343 // load VMSupport 344 Symbol* klass = vmSymbols::jdk_internal_vm_VMSupport(); 345 Klass* k = SystemDictionary::resolve_or_fail(klass, true, CHECK); 346 InstanceKlass* ik = InstanceKlass::cast(k); 347 if (ik->should_be_initialized()) { 348 ik->initialize(THREAD); 349 } 350 if (HAS_PENDING_EXCEPTION) { 351 java_lang_Throwable::print(PENDING_EXCEPTION, output()); 352 output()->cr(); 353 CLEAR_PENDING_EXCEPTION; 354 return; 355 } 356 357 // invoke the serializePropertiesToByteArray method 358 JavaValue result(T_OBJECT); 359 JavaCallArguments args; 360 361 Symbol* signature = vmSymbols::void_byte_array_signature(); 362 JavaCalls::call_static(&result, 363 ik, 364 vmSymbols::serializePropertiesToByteArray_name(), 365 signature, 366 &args, 367 THREAD); 368 if (HAS_PENDING_EXCEPTION) { 369 java_lang_Throwable::print(PENDING_EXCEPTION, output()); 370 output()->cr(); 371 CLEAR_PENDING_EXCEPTION; 372 return; 373 } 374 375 // The result should be a [B 376 oop res = result.get_oop(); 377 assert(res->is_typeArray(), "just checking"); 378 assert(TypeArrayKlass::cast(res->klass())->element_type() == T_BYTE, "just checking"); 379 380 // copy the bytes to the output stream 381 typeArrayOop ba = typeArrayOop(res); 382 jbyte* addr = typeArrayOop(res)->byte_at_addr(0); 383 output()->print_raw((const char*)addr, ba->length()); 384 } 385 386 VMUptimeDCmd::VMUptimeDCmd(outputStream* output, bool heap) : 387 DCmdWithParser(output, heap), 388 _date("-date", "Add a prefix with current date", "BOOLEAN", false, "false") { 389 _dcmdparser.add_dcmd_option(&_date); 390 } 391 392 void VMUptimeDCmd::execute(DCmdSource source, TRAPS) { 393 if (_date.value()) { 394 output()->date_stamp(true, "", ": "); 395 } 396 output()->time_stamp().update_to(tty->time_stamp().ticks()); 397 output()->stamp(); 398 output()->print_cr(" s"); 399 } 400 401 void VMInfoDCmd::execute(DCmdSource source, TRAPS) { 402 VMError::print_vm_info(_output); 403 } 404 405 void SystemGCDCmd::execute(DCmdSource source, TRAPS) { 406 Universe::heap()->collect(GCCause::_dcmd_gc_run); 407 } 408 409 void RunFinalizationDCmd::execute(DCmdSource source, TRAPS) { 410 Klass* k = vmClasses::System_klass(); 411 JavaValue result(T_VOID); 412 JavaCalls::call_static(&result, k, 413 vmSymbols::run_finalization_name(), 414 vmSymbols::void_method_signature(), CHECK); 415 } 416 417 void HeapInfoDCmd::execute(DCmdSource source, TRAPS) { 418 MutexLocker hl(THREAD, Heap_lock); 419 Universe::heap()->print_heap_on(output()); 420 } 421 422 void FinalizerInfoDCmd::execute(DCmdSource source, TRAPS) { 423 ResourceMark rm(THREAD); 424 425 if (!InstanceKlass::is_finalization_enabled()) { 426 output()->print_cr("Finalization is disabled"); 427 return; 428 } 429 430 Klass* k = SystemDictionary::resolve_or_fail( 431 vmSymbols::finalizer_histogram_klass(), true, CHECK); 432 433 JavaValue result(T_ARRAY); 434 435 // We are calling lang.ref.FinalizerHistogram.getFinalizerHistogram() method 436 // and expect it to return array of FinalizerHistogramEntry as Object[] 437 438 JavaCalls::call_static(&result, k, 439 vmSymbols::get_finalizer_histogram_name(), 440 vmSymbols::void_finalizer_histogram_entry_array_signature(), CHECK); 441 442 objArrayOop result_oop = (objArrayOop) result.get_oop(); 443 if (result_oop->length() == 0) { 444 output()->print_cr("No instances waiting for finalization found"); 445 return; 446 } 447 448 oop foop = result_oop->obj_at(0); 449 InstanceKlass* ik = InstanceKlass::cast(foop->klass()); 450 451 fieldDescriptor count_fd, name_fd; 452 453 Klass* count_res = ik->find_field( 454 vmSymbols::finalizer_histogram_entry_count_field(), vmSymbols::int_signature(), &count_fd); 455 456 Klass* name_res = ik->find_field( 457 vmSymbols::finalizer_histogram_entry_name_field(), vmSymbols::string_signature(), &name_fd); 458 459 assert(count_res != nullptr && name_res != nullptr, "Unexpected layout of FinalizerHistogramEntry"); 460 461 output()->print_cr("Unreachable instances waiting for finalization"); 462 output()->print_cr("#instances class name"); 463 output()->print_cr("-----------------------"); 464 465 for (int i = 0; i < result_oop->length(); ++i) { 466 oop element_oop = result_oop->obj_at(i); 467 oop str_oop = element_oop->obj_field(name_fd.offset()); 468 char *name = java_lang_String::as_utf8_string(str_oop); 469 int count = element_oop->int_field(count_fd.offset()); 470 output()->print_cr("%10d %s", count, name); 471 } 472 } 473 474 #if INCLUDE_SERVICES // Heap dumping/inspection supported 475 HeapDumpDCmd::HeapDumpDCmd(outputStream* output, bool heap) : 476 DCmdWithParser(output, heap), 477 _filename("filename","Name of the dump file", "FILE",true), 478 _all("-all", "Dump all objects, including unreachable objects", 479 "BOOLEAN", false, "false"), 480 _gzip("-gz", "If specified, the heap dump is written in gzipped format " 481 "using the given compression level. 1 (recommended) is the fastest, " 482 "9 the strongest compression.", "INT", false, "1"), 483 _overwrite("-overwrite", "If specified, the dump file will be overwritten if it exists", 484 "BOOLEAN", false, "false"), 485 _parallel("-parallel", "Number of parallel threads to use for heap dump. The VM " 486 "will try to use the specified number of threads, but might use fewer.", 487 "INT", false, "1") { 488 _dcmdparser.add_dcmd_option(&_all); 489 _dcmdparser.add_dcmd_argument(&_filename); 490 _dcmdparser.add_dcmd_option(&_gzip); 491 _dcmdparser.add_dcmd_option(&_overwrite); 492 _dcmdparser.add_dcmd_option(&_parallel); 493 } 494 495 void HeapDumpDCmd::execute(DCmdSource source, TRAPS) { 496 jlong level = -1; // -1 means no compression. 497 jlong parallel = HeapDumper::default_num_of_dump_threads(); 498 499 if (_gzip.is_set()) { 500 level = _gzip.value(); 501 502 if (level < 1 || level > 9) { 503 output()->print_cr("Compression level out of range (1-9): " JLONG_FORMAT, level); 504 return; 505 } 506 } 507 508 if (_parallel.is_set()) { 509 parallel = _parallel.value(); 510 511 if (parallel < 0) { 512 output()->print_cr("Invalid number of parallel dump threads."); 513 return; 514 } else if (parallel == 0) { 515 // 0 implies to disable parallel heap dump, in such case, we use serial dump instead 516 parallel = 1; 517 } 518 } 519 520 // Request a full GC before heap dump if _all is false 521 // This helps reduces the amount of unreachable objects in the dump 522 // and makes it easier to browse. 523 HeapDumper dumper(!_all.value() /* request GC if _all is false*/); 524 dumper.dump(_filename.value(), output(), (int) level, _overwrite.value(), (uint)parallel); 525 } 526 527 ClassHistogramDCmd::ClassHistogramDCmd(outputStream* output, bool heap) : 528 DCmdWithParser(output, heap), 529 _all("-all", "Inspect all objects, including unreachable objects", 530 "BOOLEAN", false, "false"), 531 _parallel_thread_num("-parallel", 532 "Number of parallel threads to use for heap inspection. " 533 "0 (the default) means let the VM determine the number of threads to use. " 534 "1 means use one thread (disable parallelism). " 535 "For any other value the VM will try to use the specified number of " 536 "threads, but might use fewer.", 537 "INT", false, "0") { 538 _dcmdparser.add_dcmd_option(&_all); 539 _dcmdparser.add_dcmd_option(&_parallel_thread_num); 540 } 541 542 void ClassHistogramDCmd::execute(DCmdSource source, TRAPS) { 543 jlong num = _parallel_thread_num.value(); 544 if (num < 0) { 545 output()->print_cr("Parallel thread number out of range (>=0): " JLONG_FORMAT, num); 546 return; 547 } 548 uint parallel_thread_num = num == 0 549 ? MAX2<uint>(1, (uint)os::initial_active_processor_count() * 3 / 8) 550 : num; 551 VM_GC_HeapInspection heapop(output(), 552 !_all.value(), /* request full gc if false */ 553 parallel_thread_num); 554 VMThread::execute(&heapop); 555 } 556 557 #endif // INCLUDE_SERVICES 558 559 ThreadDumpDCmd::ThreadDumpDCmd(outputStream* output, bool heap) : 560 DCmdWithParser(output, heap), 561 _locks("-l", "print java.util.concurrent locks", "BOOLEAN", false, "false"), 562 _extended("-e", "print extended thread information", "BOOLEAN", false, "false") { 563 _dcmdparser.add_dcmd_option(&_locks); 564 _dcmdparser.add_dcmd_option(&_extended); 565 } 566 567 void ThreadDumpDCmd::execute(DCmdSource source, TRAPS) { 568 // thread stacks and JNI global handles 569 VM_PrintThreads op1(output(), _locks.value(), _extended.value(), true /* print JNI handle info */); 570 VMThread::execute(&op1); 571 572 // Deadlock detection 573 VM_FindDeadlocks op2(output()); 574 VMThread::execute(&op2); 575 } 576 577 // Enhanced JMX Agent support 578 579 JMXStartRemoteDCmd::JMXStartRemoteDCmd(outputStream *output, bool heap_allocated) : 580 581 DCmdWithParser(output, heap_allocated), 582 583 _config_file 584 ("config.file", 585 "set com.sun.management.config.file", "STRING", false), 586 587 _jmxremote_host 588 ("jmxremote.host", 589 "set com.sun.management.jmxremote.host", "STRING", false), 590 591 _jmxremote_port 592 ("jmxremote.port", 593 "set com.sun.management.jmxremote.port", "STRING", false), 594 595 _jmxremote_rmi_port 596 ("jmxremote.rmi.port", 597 "set com.sun.management.jmxremote.rmi.port", "STRING", false), 598 599 _jmxremote_ssl 600 ("jmxremote.ssl", 601 "set com.sun.management.jmxremote.ssl", "STRING", false), 602 603 _jmxremote_registry_ssl 604 ("jmxremote.registry.ssl", 605 "set com.sun.management.jmxremote.registry.ssl", "STRING", false), 606 607 _jmxremote_authenticate 608 ("jmxremote.authenticate", 609 "set com.sun.management.jmxremote.authenticate", "STRING", false), 610 611 _jmxremote_password_file 612 ("jmxremote.password.file", 613 "set com.sun.management.jmxremote.password.file", "STRING", false), 614 615 _jmxremote_access_file 616 ("jmxremote.access.file", 617 "set com.sun.management.jmxremote.access.file", "STRING", false), 618 619 _jmxremote_login_config 620 ("jmxremote.login.config", 621 "set com.sun.management.jmxremote.login.config", "STRING", false), 622 623 _jmxremote_ssl_enabled_cipher_suites 624 ("jmxremote.ssl.enabled.cipher.suites", 625 "set com.sun.management.jmxremote.ssl.enabled.cipher.suite", "STRING", false), 626 627 _jmxremote_ssl_enabled_protocols 628 ("jmxremote.ssl.enabled.protocols", 629 "set com.sun.management.jmxremote.ssl.enabled.protocols", "STRING", false), 630 631 _jmxremote_ssl_need_client_auth 632 ("jmxremote.ssl.need.client.auth", 633 "set com.sun.management.jmxremote.need.client.auth", "STRING", false), 634 635 _jmxremote_ssl_config_file 636 ("jmxremote.ssl.config.file", 637 "set com.sun.management.jmxremote.ssl.config.file", "STRING", false), 638 639 // JDP Protocol support 640 _jmxremote_autodiscovery 641 ("jmxremote.autodiscovery", 642 "set com.sun.management.jmxremote.autodiscovery", "STRING", false), 643 644 _jdp_port 645 ("jdp.port", 646 "set com.sun.management.jdp.port", "INT", false), 647 648 _jdp_address 649 ("jdp.address", 650 "set com.sun.management.jdp.address", "STRING", false), 651 652 _jdp_source_addr 653 ("jdp.source_addr", 654 "set com.sun.management.jdp.source_addr", "STRING", false), 655 656 _jdp_ttl 657 ("jdp.ttl", 658 "set com.sun.management.jdp.ttl", "INT", false), 659 660 _jdp_pause 661 ("jdp.pause", 662 "set com.sun.management.jdp.pause", "INT", false), 663 664 _jdp_name 665 ("jdp.name", 666 "set com.sun.management.jdp.name", "STRING", false) 667 668 { 669 _dcmdparser.add_dcmd_option(&_config_file); 670 _dcmdparser.add_dcmd_option(&_jmxremote_host); 671 _dcmdparser.add_dcmd_option(&_jmxremote_port); 672 _dcmdparser.add_dcmd_option(&_jmxremote_rmi_port); 673 _dcmdparser.add_dcmd_option(&_jmxremote_ssl); 674 _dcmdparser.add_dcmd_option(&_jmxremote_registry_ssl); 675 _dcmdparser.add_dcmd_option(&_jmxremote_authenticate); 676 _dcmdparser.add_dcmd_option(&_jmxremote_password_file); 677 _dcmdparser.add_dcmd_option(&_jmxremote_access_file); 678 _dcmdparser.add_dcmd_option(&_jmxremote_login_config); 679 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_enabled_cipher_suites); 680 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_enabled_protocols); 681 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_need_client_auth); 682 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_config_file); 683 _dcmdparser.add_dcmd_option(&_jmxremote_autodiscovery); 684 _dcmdparser.add_dcmd_option(&_jdp_port); 685 _dcmdparser.add_dcmd_option(&_jdp_address); 686 _dcmdparser.add_dcmd_option(&_jdp_source_addr); 687 _dcmdparser.add_dcmd_option(&_jdp_ttl); 688 _dcmdparser.add_dcmd_option(&_jdp_pause); 689 _dcmdparser.add_dcmd_option(&_jdp_name); 690 } 691 692 void JMXStartRemoteDCmd::execute(DCmdSource source, TRAPS) { 693 ResourceMark rm(THREAD); 694 HandleMark hm(THREAD); 695 696 // Load and initialize the jdk.internal.agent.Agent class 697 // invoke startRemoteManagementAgent(string) method to start 698 // the remote management server. 699 // throw java.lang.NoSuchMethodError if the method doesn't exist 700 701 loadAgentModule(CHECK); 702 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader()); 703 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::jdk_internal_agent_Agent(), loader, true, CHECK); 704 705 JavaValue result(T_VOID); 706 707 // Pass all command line arguments to java as key=value,... 708 // All checks are done on java side 709 710 int len = 0; 711 stringStream options; 712 char comma[2] = {0,0}; 713 714 // Leave default values on Agent.class side and pass only 715 // arguments explicitly set by user. All arguments passed 716 // to jcmd override properties with the same name set by 717 // command line with -D or by managmenent.properties 718 // file. 719 #define PUT_OPTION(a) \ 720 do { \ 721 if ( (a).is_set() ){ \ 722 if ( *((a).type()) == 'I' ) { \ 723 options.print("%scom.sun.management.%s=" JLONG_FORMAT, comma, (a).name(), (jlong)((a).value())); \ 724 } else { \ 725 options.print("%scom.sun.management.%s=%s", comma, (a).name(), (char*)((a).value())); \ 726 } \ 727 comma[0] = ','; \ 728 }\ 729 } while(0); 730 731 732 PUT_OPTION(_config_file); 733 PUT_OPTION(_jmxremote_host); 734 PUT_OPTION(_jmxremote_port); 735 PUT_OPTION(_jmxremote_rmi_port); 736 PUT_OPTION(_jmxremote_ssl); 737 PUT_OPTION(_jmxremote_registry_ssl); 738 PUT_OPTION(_jmxremote_authenticate); 739 PUT_OPTION(_jmxremote_password_file); 740 PUT_OPTION(_jmxremote_access_file); 741 PUT_OPTION(_jmxremote_login_config); 742 PUT_OPTION(_jmxremote_ssl_enabled_cipher_suites); 743 PUT_OPTION(_jmxremote_ssl_enabled_protocols); 744 PUT_OPTION(_jmxremote_ssl_need_client_auth); 745 PUT_OPTION(_jmxremote_ssl_config_file); 746 PUT_OPTION(_jmxremote_autodiscovery); 747 PUT_OPTION(_jdp_port); 748 PUT_OPTION(_jdp_address); 749 PUT_OPTION(_jdp_source_addr); 750 PUT_OPTION(_jdp_ttl); 751 PUT_OPTION(_jdp_pause); 752 PUT_OPTION(_jdp_name); 753 754 #undef PUT_OPTION 755 756 Handle str = java_lang_String::create_from_str(options.as_string(), CHECK); 757 JavaCalls::call_static(&result, k, vmSymbols::startRemoteAgent_name(), vmSymbols::string_void_signature(), str, CHECK); 758 } 759 760 JMXStartLocalDCmd::JMXStartLocalDCmd(outputStream *output, bool heap_allocated) : 761 DCmd(output, heap_allocated) { 762 // do nothing 763 } 764 765 void JMXStartLocalDCmd::execute(DCmdSource source, TRAPS) { 766 ResourceMark rm(THREAD); 767 HandleMark hm(THREAD); 768 769 // Load and initialize the jdk.internal.agent.Agent class 770 // invoke startLocalManagementAgent(void) method to start 771 // the local management server 772 // throw java.lang.NoSuchMethodError if method doesn't exist 773 774 loadAgentModule(CHECK); 775 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader()); 776 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::jdk_internal_agent_Agent(), loader, true, CHECK); 777 778 JavaValue result(T_VOID); 779 JavaCalls::call_static(&result, k, vmSymbols::startLocalAgent_name(), vmSymbols::void_method_signature(), CHECK); 780 } 781 782 void JMXStopRemoteDCmd::execute(DCmdSource source, TRAPS) { 783 ResourceMark rm(THREAD); 784 HandleMark hm(THREAD); 785 786 // Load and initialize the jdk.internal.agent.Agent class 787 // invoke stopRemoteManagementAgent method to stop the 788 // management server 789 // throw java.lang.NoSuchMethodError if method doesn't exist 790 791 loadAgentModule(CHECK); 792 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader()); 793 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::jdk_internal_agent_Agent(), loader, true, CHECK); 794 795 JavaValue result(T_VOID); 796 JavaCalls::call_static(&result, k, vmSymbols::stopRemoteAgent_name(), vmSymbols::void_method_signature(), CHECK); 797 } 798 799 JMXStatusDCmd::JMXStatusDCmd(outputStream *output, bool heap_allocated) : 800 DCmd(output, heap_allocated) { 801 // do nothing 802 } 803 804 void JMXStatusDCmd::execute(DCmdSource source, TRAPS) { 805 ResourceMark rm(THREAD); 806 HandleMark hm(THREAD); 807 808 // Load and initialize the jdk.internal.agent.Agent class 809 // invoke getManagementAgentStatus() method to generate the status info 810 // throw java.lang.NoSuchMethodError if method doesn't exist 811 812 loadAgentModule(CHECK); 813 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader()); 814 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::jdk_internal_agent_Agent(), loader, true, CHECK); 815 816 JavaValue result(T_OBJECT); 817 JavaCalls::call_static(&result, k, vmSymbols::getAgentStatus_name(), vmSymbols::void_string_signature(), CHECK); 818 819 jvalue* jv = (jvalue*) result.get_value_addr(); 820 oop str = cast_to_oop(jv->l); 821 if (str != nullptr) { 822 char* out = java_lang_String::as_utf8_string(str); 823 if (out) { 824 // Avoid using print_cr() because length maybe longer than O_BUFLEN 825 output()->print_raw_cr(out); 826 return; 827 } 828 } 829 output()->print_cr("Error obtaining management agent status"); 830 } 831 832 VMDynamicLibrariesDCmd::VMDynamicLibrariesDCmd(outputStream *output, bool heap_allocated) : 833 DCmd(output, heap_allocated) { 834 // do nothing 835 } 836 837 void VMDynamicLibrariesDCmd::execute(DCmdSource source, TRAPS) { 838 os::print_dll_info(output()); 839 output()->cr(); 840 } 841 842 void CompileQueueDCmd::execute(DCmdSource source, TRAPS) { 843 VM_PrintCompileQueue printCompileQueueOp(output()); 844 VMThread::execute(&printCompileQueueOp); 845 } 846 847 void CodeListDCmd::execute(DCmdSource source, TRAPS) { 848 CodeCache::print_codelist(output()); 849 } 850 851 void CodeCacheDCmd::execute(DCmdSource source, TRAPS) { 852 CodeCache::print_layout(output()); 853 } 854 855 #ifdef LINUX 856 PerfMapDCmd::PerfMapDCmd(outputStream* output, bool heap) : 857 DCmdWithParser(output, heap), 858 _filename("filename", "Name of the map file", "FILE", false, DEFAULT_PERFMAP_FILENAME) 859 { 860 _dcmdparser.add_dcmd_argument(&_filename); 861 } 862 863 void PerfMapDCmd::execute(DCmdSource source, TRAPS) { 864 CodeCache::write_perf_map(_filename.value(), output()); 865 } 866 #endif // LINUX 867 868 //---< BEGIN >--- CodeHeap State Analytics. 869 CodeHeapAnalyticsDCmd::CodeHeapAnalyticsDCmd(outputStream* output, bool heap) : 870 DCmdWithParser(output, heap), 871 _function("function", "Function to be performed (aggregate, UsedSpace, FreeSpace, MethodCount, MethodSpace, MethodAge, MethodNames, discard", "STRING", false, "all"), 872 _granularity("granularity", "Detail level - smaller value -> more detail", "INT", false, "4096") { 873 _dcmdparser.add_dcmd_argument(&_function); 874 _dcmdparser.add_dcmd_argument(&_granularity); 875 } 876 877 void CodeHeapAnalyticsDCmd::execute(DCmdSource source, TRAPS) { 878 jlong granularity = _granularity.value(); 879 if (granularity < 1) { 880 Exceptions::fthrow(THREAD_AND_LOCATION, vmSymbols::java_lang_IllegalArgumentException(), 881 "Invalid granularity value " JLONG_FORMAT ". Should be positive.\n", granularity); 882 return; 883 } 884 885 CompileBroker::print_heapinfo(output(), _function.value(), granularity); 886 } 887 //---< END >--- CodeHeap State Analytics. 888 889 EventLogDCmd::EventLogDCmd(outputStream* output, bool heap) : 890 DCmdWithParser(output, heap), 891 _log("log", "Name of log to be printed. If omitted, all logs are printed.", "STRING", false, nullptr), 892 _max("max", "Maximum number of events to be printed (newest first). If omitted or zero, all events are printed.", "INT", false, "0") 893 { 894 _dcmdparser.add_dcmd_option(&_log); 895 _dcmdparser.add_dcmd_option(&_max); 896 } 897 898 void EventLogDCmd::execute(DCmdSource source, TRAPS) { 899 int max = (int)_max.value(); 900 if (max < 0) { 901 output()->print_cr("Invalid max option: \"%d\".", max); 902 return; 903 } 904 const char* log_name = _log.value(); 905 if (log_name != nullptr) { 906 Events::print_one(output(), log_name, max); 907 } else { 908 Events::print_all(output(), max); 909 } 910 } 911 912 void CompilerDirectivesPrintDCmd::execute(DCmdSource source, TRAPS) { 913 DirectivesStack::print(output()); 914 } 915 916 CompilerDirectivesAddDCmd::CompilerDirectivesAddDCmd(outputStream* output, bool heap) : 917 DCmdWithParser(output, heap), 918 _filename("filename","Name of the directives file", "STRING",true) { 919 _dcmdparser.add_dcmd_argument(&_filename); 920 } 921 922 void CompilerDirectivesAddDCmd::execute(DCmdSource source, TRAPS) { 923 DirectivesParser::parse_from_file(_filename.value(), output(), true); 924 } 925 926 void CompilerDirectivesRemoveDCmd::execute(DCmdSource source, TRAPS) { 927 DirectivesStack::pop(1); 928 } 929 930 void CompilerDirectivesClearDCmd::execute(DCmdSource source, TRAPS) { 931 DirectivesStack::clear(); 932 } 933 #if INCLUDE_SERVICES 934 ClassHierarchyDCmd::ClassHierarchyDCmd(outputStream* output, bool heap) : 935 DCmdWithParser(output, heap), 936 _print_interfaces("-i", "Inherited interfaces should be printed.", "BOOLEAN", false, "false"), 937 _print_subclasses("-s", "If a classname is specified, print its subclasses " 938 "in addition to its superclasses. Without this option only the " 939 "superclasses will be printed.", "BOOLEAN", false, "false"), 940 _classname("classname", "Name of class whose hierarchy should be printed. " 941 "If not specified, all class hierarchies are printed.", 942 "STRING", false) { 943 _dcmdparser.add_dcmd_option(&_print_interfaces); 944 _dcmdparser.add_dcmd_option(&_print_subclasses); 945 _dcmdparser.add_dcmd_argument(&_classname); 946 } 947 948 void ClassHierarchyDCmd::execute(DCmdSource source, TRAPS) { 949 VM_PrintClassHierarchy printClassHierarchyOp(output(), _print_interfaces.value(), 950 _print_subclasses.value(), _classname.value()); 951 VMThread::execute(&printClassHierarchyOp); 952 } 953 954 PrintClassLayoutDCmd::PrintClassLayoutDCmd(outputStream* output, bool heap) : 955 DCmdWithParser(output, heap), 956 _classname("classname", "Name of class whose layout should be printed. ", 957 "STRING", true) { 958 _dcmdparser.add_dcmd_argument(&_classname); 959 } 960 961 void PrintClassLayoutDCmd::execute(DCmdSource source, TRAPS) { 962 VM_PrintClassLayout printClassLayoutOp(output(), _classname.value()); 963 VMThread::execute(&printClassLayoutOp); 964 } 965 966 int PrintClassLayoutDCmd::num_arguments() { 967 ResourceMark rm; 968 PrintClassLayoutDCmd* dcmd = new PrintClassLayoutDCmd(nullptr, false); 969 if (dcmd != nullptr) { 970 DCmdMark mark(dcmd); 971 return dcmd->_dcmdparser.num_arguments(); 972 } else { 973 return 0; 974 } 975 } 976 977 #endif // INCLUDE_SERVICES 978 979 ClassesDCmd::ClassesDCmd(outputStream* output, bool heap) : 980 DCmdWithParser(output, heap), 981 _verbose("-verbose", 982 "Dump the detailed content of a Java class. " 983 "Some classes are annotated with flags: " 984 "F = has, or inherits, a non-empty finalize method, " 985 "f = has final method, " 986 "W = methods rewritten, " 987 "C = marked with @Contended annotation, " 988 "R = has been redefined, " 989 "S = is shared class", 990 "BOOLEAN", false, "false") { 991 _dcmdparser.add_dcmd_option(&_verbose); 992 } 993 994 class VM_PrintClasses : public VM_Operation { 995 private: 996 outputStream* _out; 997 bool _verbose; 998 public: 999 VM_PrintClasses(outputStream* out, bool verbose) : _out(out), _verbose(verbose) {} 1000 1001 virtual VMOp_Type type() const { return VMOp_PrintClasses; } 1002 1003 virtual void doit() { 1004 PrintClassClosure closure(_out, _verbose); 1005 ClassLoaderDataGraph::classes_do(&closure); 1006 } 1007 }; 1008 1009 void ClassesDCmd::execute(DCmdSource source, TRAPS) { 1010 VM_PrintClasses vmop(output(), _verbose.value()); 1011 VMThread::execute(&vmop); 1012 } 1013 1014 #if INCLUDE_CDS 1015 #define DEFAULT_CDS_ARCHIVE_FILENAME "java_pid%p_<subcmd>.jsa" 1016 1017 DumpSharedArchiveDCmd::DumpSharedArchiveDCmd(outputStream* output, bool heap) : 1018 DCmdWithParser(output, heap), 1019 _suboption("subcmd", "static_dump | dynamic_dump", "STRING", true), 1020 _filename("filename", "Name of shared archive to be dumped", "FILE", false, 1021 DEFAULT_CDS_ARCHIVE_FILENAME) 1022 { 1023 _dcmdparser.add_dcmd_argument(&_suboption); 1024 _dcmdparser.add_dcmd_argument(&_filename); 1025 } 1026 1027 void DumpSharedArchiveDCmd::execute(DCmdSource source, TRAPS) { 1028 jboolean is_static; 1029 const char* scmd = _suboption.value(); 1030 1031 // The check for _filename.is_set() is because we don't want to use 1032 // DEFAULT_CDS_ARCHIVE_FILENAME, since it is meant as a description 1033 // of the default, not the actual default. 1034 const char* file = _filename.is_set() ? _filename.value() : nullptr; 1035 1036 if (strcmp(scmd, "static_dump") == 0) { 1037 is_static = JNI_TRUE; 1038 output()->print("Static dump: "); 1039 } else if (strcmp(scmd, "dynamic_dump") == 0) { 1040 is_static = JNI_FALSE; 1041 output()->print("Dynamic dump: "); 1042 if (!CDSConfig::is_using_archive()) { 1043 output()->print_cr("Dynamic dump is unsupported when base CDS archive is not loaded"); 1044 return; 1045 } 1046 if (!RecordDynamicDumpInfo) { 1047 output()->print_cr("Dump dynamic should run with -XX:+RecordDynamicDumpInfo"); 1048 return; 1049 } 1050 } else { 1051 output()->print_cr("Invalid command for VM.cds, valid input is static_dump or dynamic_dump"); 1052 return; 1053 } 1054 1055 // call CDS.dumpSharedArchive 1056 Handle fileh; 1057 if (file != nullptr) { 1058 fileh = java_lang_String::create_from_str(file, CHECK); 1059 } 1060 Symbol* cds_name = vmSymbols::jdk_internal_misc_CDS(); 1061 Klass* cds_klass = SystemDictionary::resolve_or_fail(cds_name, true /*throw error*/, CHECK); 1062 JavaValue result(T_OBJECT); 1063 JavaCallArguments args; 1064 args.push_int(is_static); 1065 args.push_oop(fileh); 1066 JavaCalls::call_static(&result, 1067 cds_klass, 1068 vmSymbols::dumpSharedArchive(), 1069 vmSymbols::dumpSharedArchive_signature(), 1070 &args, CHECK); 1071 if (!HAS_PENDING_EXCEPTION) { 1072 assert(result.get_type() == T_OBJECT, "Sanity check"); 1073 // result contains the archive name 1074 char* archive_name = java_lang_String::as_utf8_string(result.get_oop()); 1075 output()->print_cr("%s", archive_name); 1076 } 1077 } 1078 #endif // INCLUDE_CDS 1079 1080 ThreadDumpToFileDCmd::ThreadDumpToFileDCmd(outputStream* output, bool heap) : 1081 DCmdWithParser(output, heap), 1082 _overwrite("-overwrite", "May overwrite existing file", "BOOLEAN", false, "false"), 1083 _format("-format", "Output format (\"plain\" or \"json\")", "STRING", false, "plain"), 1084 _filepath("filepath", "The file path to the output file", "FILE", true) { 1085 _dcmdparser.add_dcmd_option(&_overwrite); 1086 _dcmdparser.add_dcmd_option(&_format); 1087 _dcmdparser.add_dcmd_argument(&_filepath); 1088 } 1089 1090 void ThreadDumpToFileDCmd::execute(DCmdSource source, TRAPS) { 1091 bool json = (_format.value() != nullptr) && (strcmp(_format.value(), "json") == 0); 1092 char* path = _filepath.value(); 1093 bool overwrite = _overwrite.value(); 1094 Symbol* name = (json) ? vmSymbols::dumpThreadsToJson_name() : vmSymbols::dumpThreads_name(); 1095 dumpToFile(name, vmSymbols::string_bool_byte_array_signature(), path, overwrite, CHECK); 1096 } 1097 1098 void ThreadDumpToFileDCmd::dumpToFile(Symbol* name, Symbol* signature, const char* path, bool overwrite, TRAPS) { 1099 ResourceMark rm(THREAD); 1100 HandleMark hm(THREAD); 1101 1102 Handle h_path = java_lang_String::create_from_str(path, CHECK); 1103 1104 Symbol* sym = vmSymbols::jdk_internal_vm_ThreadDumper(); 1105 Klass* k = SystemDictionary::resolve_or_fail(sym, true, CHECK); 1106 1107 // invoke the ThreadDump method to dump to file 1108 JavaValue result(T_OBJECT); 1109 JavaCallArguments args; 1110 args.push_oop(h_path); 1111 args.push_int(overwrite ? JNI_TRUE : JNI_FALSE); 1112 JavaCalls::call_static(&result, 1113 k, 1114 name, 1115 signature, 1116 &args, 1117 THREAD); 1118 if (HAS_PENDING_EXCEPTION) { 1119 java_lang_Throwable::print(PENDING_EXCEPTION, output()); 1120 output()->cr(); 1121 CLEAR_PENDING_EXCEPTION; 1122 return; 1123 } 1124 1125 // check that result is byte array 1126 oop res = cast_to_oop(result.get_jobject()); 1127 assert(res->is_typeArray(), "just checking"); 1128 assert(TypeArrayKlass::cast(res->klass())->element_type() == T_BYTE, "just checking"); 1129 1130 // copy the bytes to the output stream 1131 typeArrayOop ba = typeArrayOop(res); 1132 jbyte* addr = typeArrayOop(res)->byte_at_addr(0); 1133 output()->print_raw((const char*)addr, ba->length()); 1134 } 1135 1136 // Calls a static no-arg method on jdk.internal.vm.JcmdVThreadCommands that returns a byte[] with 1137 // the output. If the method completes successfully then the bytes are copied to the output stream. 1138 // If the method fails then the exception is printed to the output stream. 1139 static void execute_vthread_command(Symbol* method_name, outputStream* output, TRAPS) { 1140 ResourceMark rm(THREAD); 1141 HandleMark hm(THREAD); 1142 1143 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::jdk_internal_vm_JcmdVThreadCommands(), true, CHECK); 1144 1145 JavaValue result(T_OBJECT); 1146 JavaCallArguments args; 1147 JavaCalls::call_static(&result, 1148 k, 1149 method_name, 1150 vmSymbols::void_byte_array_signature(), 1151 &args, 1152 THREAD); 1153 if (HAS_PENDING_EXCEPTION) { 1154 java_lang_Throwable::print(PENDING_EXCEPTION, output); 1155 output->cr(); 1156 CLEAR_PENDING_EXCEPTION; 1157 return; 1158 } 1159 1160 // copy the bytes to the output stream 1161 oop res = cast_to_oop(result.get_jobject()); 1162 typeArrayOop ba = typeArrayOop(res); 1163 jbyte* addr = typeArrayOop(res)->byte_at_addr(0); 1164 output->print_raw((const char*)addr, ba->length()); 1165 } 1166 1167 void VThreadSchedulerDCmd::execute(DCmdSource source, TRAPS) { 1168 execute_vthread_command(vmSymbols::printScheduler_name(), output(), CHECK); 1169 } 1170 1171 void VThreadPollersDCmd::execute(DCmdSource source, TRAPS) { 1172 execute_vthread_command(vmSymbols::printPollers_name(), output(), CHECK); 1173 } 1174 1175 CompilationMemoryStatisticDCmd::CompilationMemoryStatisticDCmd(outputStream* output, bool heap) : 1176 DCmdWithParser(output, heap), 1177 _verbose("verbose", "Print detailed information", "BOOLEAN", false, "false"), 1178 _legend("legend", "Table mode: print legend", "BOOLEAN", false, "false"), 1179 _minsize("minsize", "Minimum memory size", "MEMORY SIZE", false, "0") { 1180 _dcmdparser.add_dcmd_option(&_verbose); 1181 _dcmdparser.add_dcmd_option(&_minsize); 1182 _dcmdparser.add_dcmd_option(&_legend); 1183 } 1184 1185 void CompilationMemoryStatisticDCmd::execute(DCmdSource source, TRAPS) { 1186 const size_t minsize = _minsize.has_value() ? _minsize.value()._size : 0; 1187 CompilationMemoryStatistic::print_jcmd_report(output(), _verbose.value(), _legend.value(), minsize); 1188 } 1189 1190 #if defined(LINUX) || defined(_WIN64) || defined(__APPLE__) 1191 1192 SystemMapDCmd::SystemMapDCmd(outputStream* output, bool heap) : DCmd(output, heap) {} 1193 1194 void SystemMapDCmd::execute(DCmdSource source, TRAPS) { 1195 MemMapPrinter::print_all_mappings(output()); 1196 } 1197 1198 static constexpr char default_filename[] = "vm_memory_map_%p.txt"; 1199 1200 SystemDumpMapDCmd::SystemDumpMapDCmd(outputStream* output, bool heap) : 1201 DCmdWithParser(output, heap), 1202 _filename("-F", "file path", "FILE", false, default_filename) { 1203 _dcmdparser.add_dcmd_option(&_filename); 1204 } 1205 1206 void SystemDumpMapDCmd::execute(DCmdSource source, TRAPS) { 1207 const char* name = _filename.value(); 1208 if (name == nullptr || name[0] == 0) { 1209 output()->print_cr("filename is empty or not specified. No file written"); 1210 return; 1211 } 1212 fileStream fs(name); 1213 if (fs.is_open()) { 1214 if (!MemTracker::enabled()) { 1215 output()->print_cr("(NMT is disabled, will not annotate mappings)."); 1216 } 1217 MemMapPrinter::print_all_mappings(&fs); 1218 // For the readers convenience, resolve path name. 1219 char tmp[JVM_MAXPATHLEN]; 1220 const char* absname = os::realpath(name, tmp, sizeof(tmp)); 1221 name = absname != nullptr ? absname : name; 1222 output()->print_cr("Memory map dumped to \"%s\".", name); 1223 } else { 1224 output()->print_cr("Failed to open \"%s\" for writing (%s).", name, os::strerror(errno)); 1225 } 1226 } 1227 1228 #endif // LINUX