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/cdsConfig.hpp" 27 #include "cds/cds_globals.hpp" 28 #include "classfile/classLoaderDataGraph.hpp" 29 #include "classfile/classLoaderHierarchyDCmd.hpp" 30 #include "classfile/classLoaderStats.hpp" 31 #include "classfile/javaClasses.hpp" 32 #include "classfile/systemDictionary.hpp" 33 #include "classfile/vmClasses.hpp" 34 #include "code/codeCache.hpp" 35 #include "compiler/compilationMemoryStatistic.hpp" 36 #include "compiler/compiler_globals.hpp" 37 #include "compiler/compileBroker.hpp" 38 #include "compiler/directivesParser.hpp" 39 #include "gc/shared/gcVMOperations.hpp" 40 #include "jvm.h" 41 #include "memory/metaspace/metaspaceDCmd.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/interfaceSupport.inline.hpp" 56 #include "runtime/javaCalls.hpp" 57 #include "runtime/jniHandles.hpp" 58 #include "runtime/os.hpp" 59 #include "runtime/vmOperations.hpp" 60 #include "runtime/vm_version.hpp" 61 #include "services/diagnosticArgument.hpp" 62 #include "services/diagnosticCommand.hpp" 63 #include "services/diagnosticFramework.hpp" 64 #include "services/heapDumper.hpp" 65 #include "services/management.hpp" 66 #include "services/writeableFlags.hpp" 67 #include "utilities/debug.hpp" 68 #include "utilities/events.hpp" 69 #include "utilities/formatBuffer.hpp" 70 #include "utilities/macros.hpp" 71 #include "utilities/parseInteger.hpp" 72 #ifdef LINUX 73 #include "os_posix.hpp" 74 #include "mallocInfoDcmd.hpp" 75 #include "trimCHeapDCmd.hpp" 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<EventLogDCmd>(full_export, true, false)); 123 #if INCLUDE_JVMTI // Both JVMTI and SERVICES have to be enabled to have this dcmd 124 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JVMTIAgentLoadDCmd>(full_export, true, false)); 125 #endif // INCLUDE_JVMTI 126 #endif // INCLUDE_SERVICES 127 #if INCLUDE_JVMTI 128 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JVMTIDataDumpDCmd>(full_export, true, false)); 129 #endif // INCLUDE_JVMTI 130 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ThreadDumpDCmd>(full_export, true, false)); 131 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ThreadDumpToFileDCmd>(full_export, true, false)); 132 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VThreadSummaryDCmd>(full_export, true, false)); 133 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassLoaderStatsDCmd>(full_export, true, false)); 134 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassLoaderHierarchyDCmd>(full_export, true, false)); 135 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompileQueueDCmd>(full_export, true, false)); 136 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CodeListDCmd>(full_export, true, false)); 137 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CodeCacheDCmd>(full_export, true, false)); 138 #ifdef LINUX 139 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<PerfMapDCmd>(full_export, true, false)); 140 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<TrimCLibcHeapDCmd>(full_export, true, false)); 141 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<MallocInfoDcmd>(full_export, true, false)); 142 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SystemMapDCmd>(full_export, true,false)); 143 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SystemDumpMapDCmd>(full_export, true,false)); 144 #endif // LINUX 145 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CodeHeapAnalyticsDCmd>(full_export, true, false)); 146 147 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesPrintDCmd>(full_export, true, false)); 148 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesAddDCmd>(full_export, true, false)); 149 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesRemoveDCmd>(full_export, true, false)); 150 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesClearDCmd>(full_export, true, false)); 151 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilationMemoryStatisticDCmd>(full_export, true, false)); 152 153 // Enhanced JMX Agent Support 154 // These commands won't be exported via the DiagnosticCommandMBean until an 155 // appropriate permission is created for them 156 uint32_t jmx_agent_export_flags = DCmd_Source_Internal | DCmd_Source_AttachAPI; 157 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStartRemoteDCmd>(jmx_agent_export_flags, true,false)); 158 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStartLocalDCmd>(jmx_agent_export_flags, true,false)); 159 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStopRemoteDCmd>(jmx_agent_export_flags, true,false)); 160 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStatusDCmd>(jmx_agent_export_flags, true,false)); 161 162 // Debug on cmd (only makes sense with JVMTI since the agentlib needs it). 163 #if INCLUDE_JVMTI 164 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<DebugOnCmdStartDCmd>(full_export, true, true)); 165 #endif // INCLUDE_JVMTI 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 " SIZE_FORMAT " 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_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", "STRING",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, Handle(), 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, Handle(), 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, Handle(), 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, Handle(), 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 #define DEFAULT_PERFMAP_FILENAME "/tmp/perf-<pid>.map" 857 858 PerfMapDCmd::PerfMapDCmd(outputStream* output, bool heap) : 859 DCmdWithParser(output, heap), 860 _filename("filename", "Name of the map file", "STRING", false, DEFAULT_PERFMAP_FILENAME) 861 { 862 _dcmdparser.add_dcmd_argument(&_filename); 863 } 864 865 void PerfMapDCmd::execute(DCmdSource source, TRAPS) { 866 // The check for _filename.is_set() is because we don't want to use 867 // DEFAULT_PERFMAP_FILENAME, since it is meant as a description 868 // of the default, not the actual default. 869 CodeCache::write_perf_map(_filename.is_set() ? _filename.value() : nullptr, output()); 870 } 871 #endif // LINUX 872 873 //---< BEGIN >--- CodeHeap State Analytics. 874 CodeHeapAnalyticsDCmd::CodeHeapAnalyticsDCmd(outputStream* output, bool heap) : 875 DCmdWithParser(output, heap), 876 _function("function", "Function to be performed (aggregate, UsedSpace, FreeSpace, MethodCount, MethodSpace, MethodAge, MethodNames, discard", "STRING", false, "all"), 877 _granularity("granularity", "Detail level - smaller value -> more detail", "INT", false, "4096") { 878 _dcmdparser.add_dcmd_argument(&_function); 879 _dcmdparser.add_dcmd_argument(&_granularity); 880 } 881 882 void CodeHeapAnalyticsDCmd::execute(DCmdSource source, TRAPS) { 883 jlong granularity = _granularity.value(); 884 if (granularity < 1) { 885 Exceptions::fthrow(THREAD_AND_LOCATION, vmSymbols::java_lang_IllegalArgumentException(), 886 "Invalid granularity value " JLONG_FORMAT ". Should be positive.\n", granularity); 887 return; 888 } 889 890 CompileBroker::print_heapinfo(output(), _function.value(), granularity); 891 } 892 //---< END >--- CodeHeap State Analytics. 893 894 EventLogDCmd::EventLogDCmd(outputStream* output, bool heap) : 895 DCmdWithParser(output, heap), 896 _log("log", "Name of log to be printed. If omitted, all logs are printed.", "STRING", false, nullptr), 897 _max("max", "Maximum number of events to be printed (newest first). If omitted, all events are printed.", "STRING", false, nullptr) 898 { 899 _dcmdparser.add_dcmd_option(&_log); 900 _dcmdparser.add_dcmd_option(&_max); 901 } 902 903 void EventLogDCmd::execute(DCmdSource source, TRAPS) { 904 const char* max_value = _max.value(); 905 int max = -1; 906 if (max_value != nullptr) { 907 char* endptr = nullptr; 908 int max; 909 if (!parse_integer(max_value, &max)) { 910 output()->print_cr("Invalid max option: \"%s\".", max_value); 911 return; 912 } 913 } 914 const char* log_name = _log.value(); 915 if (log_name != nullptr) { 916 Events::print_one(output(), log_name, max); 917 } else { 918 Events::print_all(output(), max); 919 } 920 } 921 922 void CompilerDirectivesPrintDCmd::execute(DCmdSource source, TRAPS) { 923 DirectivesStack::print(output()); 924 } 925 926 CompilerDirectivesAddDCmd::CompilerDirectivesAddDCmd(outputStream* output, bool heap) : 927 DCmdWithParser(output, heap), 928 _filename("filename","Name of the directives file", "STRING",true) { 929 _dcmdparser.add_dcmd_argument(&_filename); 930 } 931 932 void CompilerDirectivesAddDCmd::execute(DCmdSource source, TRAPS) { 933 DirectivesParser::parse_from_file(_filename.value(), output(), true); 934 } 935 936 void CompilerDirectivesRemoveDCmd::execute(DCmdSource source, TRAPS) { 937 DirectivesStack::pop(1); 938 } 939 940 void CompilerDirectivesClearDCmd::execute(DCmdSource source, TRAPS) { 941 DirectivesStack::clear(); 942 } 943 #if INCLUDE_SERVICES 944 ClassHierarchyDCmd::ClassHierarchyDCmd(outputStream* output, bool heap) : 945 DCmdWithParser(output, heap), 946 _print_interfaces("-i", "Inherited interfaces should be printed.", "BOOLEAN", false, "false"), 947 _print_subclasses("-s", "If a classname is specified, print its subclasses " 948 "in addition to its superclasses. Without this option only the " 949 "superclasses will be printed.", "BOOLEAN", false, "false"), 950 _classname("classname", "Name of class whose hierarchy should be printed. " 951 "If not specified, all class hierarchies are printed.", 952 "STRING", false) { 953 _dcmdparser.add_dcmd_option(&_print_interfaces); 954 _dcmdparser.add_dcmd_option(&_print_subclasses); 955 _dcmdparser.add_dcmd_argument(&_classname); 956 } 957 958 void ClassHierarchyDCmd::execute(DCmdSource source, TRAPS) { 959 VM_PrintClassHierarchy printClassHierarchyOp(output(), _print_interfaces.value(), 960 _print_subclasses.value(), _classname.value()); 961 VMThread::execute(&printClassHierarchyOp); 962 } 963 #endif 964 965 ClassesDCmd::ClassesDCmd(outputStream* output, bool heap) : 966 DCmdWithParser(output, heap), 967 _verbose("-verbose", 968 "Dump the detailed content of a Java class. " 969 "Some classes are annotated with flags: " 970 "F = has, or inherits, a non-empty finalize method, " 971 "f = has final method, " 972 "W = methods rewritten, " 973 "C = marked with @Contended annotation, " 974 "R = has been redefined, " 975 "S = is shared class", 976 "BOOLEAN", false, "false") { 977 _dcmdparser.add_dcmd_option(&_verbose); 978 } 979 980 class VM_PrintClasses : public VM_Operation { 981 private: 982 outputStream* _out; 983 bool _verbose; 984 public: 985 VM_PrintClasses(outputStream* out, bool verbose) : _out(out), _verbose(verbose) {} 986 987 virtual VMOp_Type type() const { return VMOp_PrintClasses; } 988 989 virtual void doit() { 990 PrintClassClosure closure(_out, _verbose); 991 ClassLoaderDataGraph::classes_do(&closure); 992 } 993 }; 994 995 void ClassesDCmd::execute(DCmdSource source, TRAPS) { 996 VM_PrintClasses vmop(output(), _verbose.value()); 997 VMThread::execute(&vmop); 998 } 999 1000 #if INCLUDE_CDS 1001 #define DEFAULT_CDS_ARCHIVE_FILENAME "java_pid<pid>_<subcmd>.jsa" 1002 1003 DumpSharedArchiveDCmd::DumpSharedArchiveDCmd(outputStream* output, bool heap) : 1004 DCmdWithParser(output, heap), 1005 _suboption("subcmd", "static_dump | dynamic_dump", "STRING", true), 1006 _filename("filename", "Name of shared archive to be dumped", "STRING", false, 1007 DEFAULT_CDS_ARCHIVE_FILENAME) 1008 { 1009 _dcmdparser.add_dcmd_argument(&_suboption); 1010 _dcmdparser.add_dcmd_argument(&_filename); 1011 } 1012 1013 void DumpSharedArchiveDCmd::execute(DCmdSource source, TRAPS) { 1014 jboolean is_static; 1015 const char* scmd = _suboption.value(); 1016 1017 // The check for _filename.is_set() is because we don't want to use 1018 // DEFAULT_CDS_ARCHIVE_FILENAME, since it is meant as a description 1019 // of the default, not the actual default. 1020 const char* file = _filename.is_set() ? _filename.value() : nullptr; 1021 1022 if (strcmp(scmd, "static_dump") == 0) { 1023 is_static = JNI_TRUE; 1024 output()->print("Static dump: "); 1025 } else if (strcmp(scmd, "dynamic_dump") == 0) { 1026 is_static = JNI_FALSE; 1027 output()->print("Dynamic dump: "); 1028 if (!CDSConfig::is_using_archive()) { 1029 output()->print_cr("Dynamic dump is unsupported when base CDS archive is not loaded"); 1030 return; 1031 } 1032 if (!RecordDynamicDumpInfo) { 1033 output()->print_cr("Dump dynamic should run with -XX:+RecordDynamicDumpInfo"); 1034 return; 1035 } 1036 } else { 1037 output()->print_cr("Invalid command for VM.cds, valid input is static_dump or dynamic_dump"); 1038 return; 1039 } 1040 1041 // call CDS.dumpSharedArchive 1042 Handle fileh; 1043 if (file != nullptr) { 1044 fileh = java_lang_String::create_from_str(_filename.value(), CHECK); 1045 } 1046 Symbol* cds_name = vmSymbols::jdk_internal_misc_CDS(); 1047 Klass* cds_klass = SystemDictionary::resolve_or_fail(cds_name, true /*throw error*/, CHECK); 1048 JavaValue result(T_OBJECT); 1049 JavaCallArguments args; 1050 args.push_int(is_static); 1051 args.push_oop(fileh); 1052 JavaCalls::call_static(&result, 1053 cds_klass, 1054 vmSymbols::dumpSharedArchive(), 1055 vmSymbols::dumpSharedArchive_signature(), 1056 &args, CHECK); 1057 if (!HAS_PENDING_EXCEPTION) { 1058 assert(result.get_type() == T_OBJECT, "Sanity check"); 1059 // result contains the archive name 1060 char* archive_name = java_lang_String::as_utf8_string(result.get_oop()); 1061 output()->print_cr("%s", archive_name); 1062 } 1063 } 1064 #endif // INCLUDE_CDS 1065 1066 #if INCLUDE_JVMTI 1067 extern "C" typedef char const* (JNICALL *debugInit_startDebuggingViaCommandPtr)(JNIEnv* env, jthread thread, char const** transport_name, 1068 char const** address, jboolean* first_start); 1069 static debugInit_startDebuggingViaCommandPtr dvc_start_ptr = nullptr; 1070 1071 void DebugOnCmdStartDCmd::execute(DCmdSource source, TRAPS) { 1072 char const* transport = nullptr; 1073 char const* addr = nullptr; 1074 jboolean is_first_start = JNI_FALSE; 1075 JavaThread* thread = THREAD; 1076 jthread jt = JNIHandles::make_local(thread->threadObj()); 1077 ThreadToNativeFromVM ttn(thread); 1078 const char *error = "Could not find jdwp agent."; 1079 1080 if (!dvc_start_ptr) { 1081 JvmtiAgentList::Iterator it = JvmtiAgentList::agents(); 1082 while (it.has_next()) { 1083 JvmtiAgent* agent = it.next(); 1084 if ((strcmp("jdwp", agent->name()) == 0) && (dvc_start_ptr == nullptr)) { 1085 char const* func = "debugInit_startDebuggingViaCommand"; 1086 dvc_start_ptr = (debugInit_startDebuggingViaCommandPtr) os::find_agent_function(agent, false, &func, 1); 1087 } 1088 } 1089 } 1090 1091 if (dvc_start_ptr) { 1092 error = dvc_start_ptr(thread->jni_environment(), jt, &transport, &addr, &is_first_start); 1093 } 1094 1095 if (error != nullptr) { 1096 output()->print_cr("Debugging has not been started: %s", error); 1097 } else { 1098 output()->print_cr(is_first_start ? "Debugging has been started." : "Debugging is already active."); 1099 output()->print_cr("Transport : %s", transport ? transport : "#unknown"); 1100 output()->print_cr("Address : %s", addr ? addr : "#unknown"); 1101 } 1102 } 1103 #endif // INCLUDE_JVMTI 1104 1105 ThreadDumpToFileDCmd::ThreadDumpToFileDCmd(outputStream* output, bool heap) : 1106 DCmdWithParser(output, heap), 1107 _overwrite("-overwrite", "May overwrite existing file", "BOOLEAN", false, "false"), 1108 _format("-format", "Output format (\"plain\" or \"json\")", "STRING", false, "plain"), 1109 _filepath("filepath", "The file path to the output file", "STRING", true) { 1110 _dcmdparser.add_dcmd_option(&_overwrite); 1111 _dcmdparser.add_dcmd_option(&_format); 1112 _dcmdparser.add_dcmd_argument(&_filepath); 1113 } 1114 1115 void ThreadDumpToFileDCmd::execute(DCmdSource source, TRAPS) { 1116 bool json = (_format.value() != nullptr) && (strcmp(_format.value(), "json") == 0); 1117 char* path = _filepath.value(); 1118 bool overwrite = _overwrite.value(); 1119 Symbol* name = (json) ? vmSymbols::dumpThreadsToJson_name() : vmSymbols::dumpThreads_name(); 1120 dumpToFile(name, vmSymbols::string_bool_byte_array_signature(), path, overwrite, CHECK); 1121 } 1122 1123 void ThreadDumpToFileDCmd::dumpToFile(Symbol* name, Symbol* signature, const char* path, bool overwrite, TRAPS) { 1124 ResourceMark rm(THREAD); 1125 HandleMark hm(THREAD); 1126 1127 Handle h_path = java_lang_String::create_from_str(path, CHECK); 1128 1129 Symbol* sym = vmSymbols::jdk_internal_vm_ThreadDumper(); 1130 Klass* k = SystemDictionary::resolve_or_fail(sym, true, CHECK); 1131 if (HAS_PENDING_EXCEPTION) { 1132 java_lang_Throwable::print(PENDING_EXCEPTION, output()); 1133 output()->cr(); 1134 CLEAR_PENDING_EXCEPTION; 1135 return; 1136 } 1137 1138 // invoke the ThreadDump method to dump to file 1139 JavaValue result(T_OBJECT); 1140 JavaCallArguments args; 1141 args.push_oop(h_path); 1142 args.push_int(overwrite ? JNI_TRUE : JNI_FALSE); 1143 JavaCalls::call_static(&result, 1144 k, 1145 name, 1146 signature, 1147 &args, 1148 THREAD); 1149 if (HAS_PENDING_EXCEPTION) { 1150 java_lang_Throwable::print(PENDING_EXCEPTION, output()); 1151 output()->cr(); 1152 CLEAR_PENDING_EXCEPTION; 1153 return; 1154 } 1155 1156 // check that result is byte array 1157 oop res = cast_to_oop(result.get_jobject()); 1158 assert(res->is_typeArray(), "just checking"); 1159 assert(TypeArrayKlass::cast(res->klass())->element_type() == T_BYTE, "just checking"); 1160 1161 // copy the bytes to the output stream 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 VThreadSummaryDCmd::execute(DCmdSource source, TRAPS) { 1168 ResourceMark rm(THREAD); 1169 HandleMark hm(THREAD); 1170 1171 Symbol* sym = vmSymbols::jdk_internal_vm_VThreadSummary(); 1172 Klass* k = SystemDictionary::resolve_or_fail(sym, true, CHECK); 1173 if (HAS_PENDING_EXCEPTION) { 1174 java_lang_Throwable::print(PENDING_EXCEPTION, output()); 1175 output()->cr(); 1176 CLEAR_PENDING_EXCEPTION; 1177 return; 1178 } 1179 1180 // invoke VThreadSummary.print method 1181 JavaValue result(T_OBJECT); 1182 JavaCallArguments args; 1183 JavaCalls::call_static(&result, 1184 k, 1185 vmSymbols::print_name(), 1186 vmSymbols::void_byte_array_signature(), 1187 &args, 1188 THREAD); 1189 if (HAS_PENDING_EXCEPTION) { 1190 java_lang_Throwable::print(PENDING_EXCEPTION, output()); 1191 output()->cr(); 1192 CLEAR_PENDING_EXCEPTION; 1193 return; 1194 } 1195 1196 // check that result is byte array 1197 oop res = cast_to_oop(result.get_jobject()); 1198 assert(res->is_typeArray(), "just checking"); 1199 assert(TypeArrayKlass::cast(res->klass())->element_type() == T_BYTE, "just checking"); 1200 1201 // copy the bytes to the output stream 1202 typeArrayOop ba = typeArrayOop(res); 1203 jbyte* addr = typeArrayOop(res)->byte_at_addr(0); 1204 output()->print_raw((const char*)addr, ba->length()); 1205 } 1206 1207 CompilationMemoryStatisticDCmd::CompilationMemoryStatisticDCmd(outputStream* output, bool heap) : 1208 DCmdWithParser(output, heap), 1209 _human_readable("-H", "Human readable format", "BOOLEAN", false, "false"), 1210 _minsize("-s", "Minimum memory size", "MEMORY SIZE", false, "0") { 1211 _dcmdparser.add_dcmd_option(&_human_readable); 1212 _dcmdparser.add_dcmd_option(&_minsize); 1213 } 1214 1215 void CompilationMemoryStatisticDCmd::execute(DCmdSource source, TRAPS) { 1216 const bool human_readable = _human_readable.value(); 1217 const size_t minsize = _minsize.has_value() ? _minsize.value()._size : 0; 1218 CompilationMemoryStatistic::print_all_by_size(output(), human_readable, minsize); 1219 } 1220 1221 #ifdef LINUX 1222 1223 SystemMapDCmd::SystemMapDCmd(outputStream* output, bool heap) : DCmd(output, heap) {} 1224 1225 void SystemMapDCmd::execute(DCmdSource source, TRAPS) { 1226 MemMapPrinter::print_all_mappings(output()); 1227 } 1228 1229 static constexpr char default_filename[] = "vm_memory_map_<pid>.txt"; 1230 1231 SystemDumpMapDCmd::SystemDumpMapDCmd(outputStream* output, bool heap) : 1232 DCmdWithParser(output, heap), 1233 _filename("-F", "file path", "STRING", false, default_filename) { 1234 _dcmdparser.add_dcmd_option(&_filename); 1235 } 1236 1237 void SystemDumpMapDCmd::execute(DCmdSource source, TRAPS) { 1238 stringStream defaultname; 1239 const char* name = nullptr; 1240 if (_filename.is_set()) { 1241 name = _filename.value(); 1242 } else { 1243 defaultname.print("vm_memory_map_%d.txt", os::current_process_id()); 1244 name = defaultname.base(); 1245 } 1246 fileStream fs(name); 1247 if (fs.is_open()) { 1248 if (!MemTracker::enabled()) { 1249 output()->print_cr("(NMT is disabled, will not annotate mappings)."); 1250 } 1251 MemMapPrinter::print_all_mappings(&fs); 1252 // For the readers convenience, resolve path name. 1253 char tmp[JVM_MAXPATHLEN]; 1254 const char* absname = os::Posix::realpath(name, tmp, sizeof(tmp)); 1255 name = absname != nullptr ? absname : name; 1256 output()->print_cr("Memory map dumped to \"%s\".", name); 1257 } else { 1258 output()->print_cr("Failed to open \"%s\" for writing (%s).", name, os::strerror(errno)); 1259 } 1260 } 1261 1262 #endif // LINUX