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/javaCalls.hpp" 56 #include "runtime/jniHandles.hpp" 57 #include "runtime/os.hpp" 58 #include "runtime/vmOperations.hpp" 59 #include "runtime/vm_version.hpp" 60 #include "services/diagnosticArgument.hpp" 61 #include "services/diagnosticCommand.hpp" 62 #include "services/diagnosticFramework.hpp" 63 #include "services/heapDumper.hpp" 64 #include "services/management.hpp" 65 #include "services/writeableFlags.hpp" 66 #include "utilities/debug.hpp" 67 #include "utilities/events.hpp" 68 #include "utilities/formatBuffer.hpp" 69 #include "utilities/macros.hpp" 70 #include "utilities/parseInteger.hpp" 71 #ifdef LINUX 72 #include "os_posix.hpp" 73 #include "mallocInfoDcmd.hpp" 74 #include "trimCHeapDCmd.hpp" 75 #include <errno.h> 76 #endif 77 78 static void loadAgentModule(TRAPS) { 79 ResourceMark rm(THREAD); 80 HandleMark hm(THREAD); 81 82 JavaValue result(T_OBJECT); 83 Handle h_module_name = java_lang_String::create_from_str("jdk.management.agent", CHECK); 84 JavaCalls::call_static(&result, 85 vmClasses::module_Modules_klass(), 86 vmSymbols::loadModule_name(), 87 vmSymbols::loadModule_signature(), 88 h_module_name, 89 THREAD); 90 } 91 92 void DCmd::register_dcmds(){ 93 // Registration of the diagnostic commands 94 // First argument specifies which interfaces will export the command 95 // Second argument specifies if the command is enabled 96 // Third argument specifies if the command is hidden 97 uint32_t full_export = DCmd_Source_Internal | DCmd_Source_AttachAPI 98 | DCmd_Source_MBean; 99 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<HelpDCmd>(full_export, true, false)); 100 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VersionDCmd>(full_export, true, false)); 101 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CommandLineDCmd>(full_export, true, false)); 102 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<PrintSystemPropertiesDCmd>(full_export, true, false)); 103 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<PrintVMFlagsDCmd>(full_export, true, false)); 104 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SetVMFlagDCmd>(full_export, true, false)); 105 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VMDynamicLibrariesDCmd>(full_export, true, false)); 106 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VMUptimeDCmd>(full_export, true, false)); 107 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VMInfoDCmd>(full_export, true, false)); 108 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SystemGCDCmd>(full_export, true, false)); 109 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<RunFinalizationDCmd>(full_export, true, false)); 110 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<HeapInfoDCmd>(full_export, true, false)); 111 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<FinalizerInfoDCmd>(full_export, true, false)); 112 #if INCLUDE_SERVICES 113 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<HeapDumpDCmd>(DCmd_Source_Internal | DCmd_Source_AttachAPI, true, false)); 114 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassHistogramDCmd>(full_export, true, false)); 115 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SystemDictionaryDCmd>(full_export, true, false)); 116 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassHierarchyDCmd>(full_export, true, false)); 117 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassesDCmd>(full_export, true, false)); 118 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SymboltableDCmd>(full_export, true, false)); 119 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<StringtableDCmd>(full_export, true, false)); 120 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<metaspace::MetaspaceDCmd>(full_export, true, false)); 121 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<EventLogDCmd>(full_export, true, false)); 122 #if INCLUDE_JVMTI // Both JVMTI and SERVICES have to be enabled to have this dcmd 123 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JVMTIAgentLoadDCmd>(full_export, true, false)); 124 #endif // INCLUDE_JVMTI 125 #endif // INCLUDE_SERVICES 126 #if INCLUDE_JVMTI 127 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JVMTIDataDumpDCmd>(full_export, true, false)); 128 #endif // INCLUDE_JVMTI 129 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ThreadDumpDCmd>(full_export, true, false)); 130 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ThreadDumpToFileDCmd>(full_export, true, false)); 131 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassLoaderStatsDCmd>(full_export, true, false)); 132 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassLoaderHierarchyDCmd>(full_export, true, false)); 133 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompileQueueDCmd>(full_export, true, false)); 134 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CodeListDCmd>(full_export, true, false)); 135 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CodeCacheDCmd>(full_export, true, false)); 136 #ifdef LINUX 137 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<PerfMapDCmd>(full_export, true, false)); 138 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<TrimCLibcHeapDCmd>(full_export, true, false)); 139 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<MallocInfoDcmd>(full_export, true, false)); 140 #endif // LINUX 141 #if defined(LINUX) || defined(_WIN64) 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 or WINDOWS 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 #if INCLUDE_CDS 163 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<DumpSharedArchiveDCmd>(full_export, true, false)); 164 #endif // INCLUDE_CDS 165 166 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<NMTDCmd>(full_export, true, false)); 167 } 168 169 HelpDCmd::HelpDCmd(outputStream* output, bool heap) : DCmdWithParser(output, heap), 170 _all("-all", "Show help for all commands", "BOOLEAN", false, "false"), 171 _cmd("command name", "The name of the command for which we want help", 172 "STRING", false) { 173 _dcmdparser.add_dcmd_option(&_all); 174 _dcmdparser.add_dcmd_argument(&_cmd); 175 }; 176 177 178 static int compare_strings(const char** s1, const char** s2) { 179 return ::strcmp(*s1, *s2); 180 } 181 182 void HelpDCmd::execute(DCmdSource source, TRAPS) { 183 if (_all.value()) { 184 GrowableArray<const char*>* cmd_list = DCmdFactory::DCmd_list(source); 185 cmd_list->sort(compare_strings); 186 for (int i = 0; i < cmd_list->length(); i++) { 187 DCmdFactory* factory = DCmdFactory::factory(source, cmd_list->at(i), 188 strlen(cmd_list->at(i))); 189 output()->print_cr("%s%s", factory->name(), 190 factory->is_enabled() ? "" : " [disabled]"); 191 output()->print_cr("\t%s", factory->description()); 192 output()->cr(); 193 factory = factory->next(); 194 } 195 } else if (_cmd.has_value()) { 196 DCmd* cmd = nullptr; 197 DCmdFactory* factory = DCmdFactory::factory(source, _cmd.value(), 198 strlen(_cmd.value())); 199 if (factory != nullptr) { 200 output()->print_cr("%s%s", factory->name(), 201 factory->is_enabled() ? "" : " [disabled]"); 202 output()->print_cr("%s", factory->description()); 203 output()->print_cr("\nImpact: %s", factory->impact()); 204 output()->cr(); 205 cmd = factory->create_resource_instance(output()); 206 if (cmd != nullptr) { 207 DCmdMark mark(cmd); 208 cmd->print_help(factory->name()); 209 } 210 } else { 211 output()->print_cr("Help unavailable : '%s' : No such command", _cmd.value()); 212 } 213 } else { 214 output()->print_cr("The following commands are available:"); 215 GrowableArray<const char *>* cmd_list = DCmdFactory::DCmd_list(source); 216 cmd_list->sort(compare_strings); 217 for (int i = 0; i < cmd_list->length(); i++) { 218 DCmdFactory* factory = DCmdFactory::factory(source, cmd_list->at(i), 219 strlen(cmd_list->at(i))); 220 output()->print_cr("%s%s", factory->name(), 221 factory->is_enabled() ? "" : " [disabled]"); 222 factory = factory->_next; 223 } 224 output()->print_cr("\nFor more information about a specific command use 'help <command>'."); 225 } 226 } 227 228 void VersionDCmd::execute(DCmdSource source, TRAPS) { 229 output()->print_cr("%s version %s", VM_Version::vm_name(), 230 VM_Version::vm_release()); 231 JDK_Version jdk_version = JDK_Version::current(); 232 if (jdk_version.patch_version() > 0) { 233 output()->print_cr("JDK %d.%d.%d.%d", jdk_version.major_version(), 234 jdk_version.minor_version(), jdk_version.security_version(), 235 jdk_version.patch_version()); 236 } else { 237 output()->print_cr("JDK %d.%d.%d", jdk_version.major_version(), 238 jdk_version.minor_version(), jdk_version.security_version()); 239 } 240 } 241 242 PrintVMFlagsDCmd::PrintVMFlagsDCmd(outputStream* output, bool heap) : 243 DCmdWithParser(output, heap), 244 _all("-all", "Print all flags supported by the VM", "BOOLEAN", false, "false") { 245 _dcmdparser.add_dcmd_option(&_all); 246 } 247 248 void PrintVMFlagsDCmd::execute(DCmdSource source, TRAPS) { 249 if (_all.value()) { 250 JVMFlag::printFlags(output(), true); 251 } else { 252 JVMFlag::printSetFlags(output()); 253 } 254 } 255 256 SetVMFlagDCmd::SetVMFlagDCmd(outputStream* output, bool heap) : 257 DCmdWithParser(output, heap), 258 _flag("flag name", "The name of the flag we want to set", 259 "STRING", true), 260 _value("string value", "The value we want to set", "STRING", false) { 261 _dcmdparser.add_dcmd_argument(&_flag); 262 _dcmdparser.add_dcmd_argument(&_value); 263 } 264 265 void SetVMFlagDCmd::execute(DCmdSource source, TRAPS) { 266 const char* val = nullptr; 267 if (_value.value() != nullptr) { 268 val = _value.value(); 269 } 270 271 FormatBuffer<80> err_msg("%s", ""); 272 int ret = WriteableFlags::set_flag(_flag.value(), val, JVMFlagOrigin::MANAGEMENT, err_msg); 273 274 if (ret != JVMFlag::SUCCESS) { 275 output()->print_cr("%s", err_msg.buffer()); 276 } 277 } 278 279 void JVMTIDataDumpDCmd::execute(DCmdSource source, TRAPS) { 280 if (JvmtiExport::should_post_data_dump()) { 281 JvmtiExport::post_data_dump(); 282 } 283 } 284 285 #if INCLUDE_SERVICES 286 #if INCLUDE_JVMTI 287 JVMTIAgentLoadDCmd::JVMTIAgentLoadDCmd(outputStream* output, bool heap) : 288 DCmdWithParser(output, heap), 289 _libpath("library path", "Absolute path of the JVMTI agent to load.", 290 "STRING", true), 291 _option("agent option", "Option string to pass the agent.", "STRING", false) { 292 _dcmdparser.add_dcmd_argument(&_libpath); 293 _dcmdparser.add_dcmd_argument(&_option); 294 } 295 296 void JVMTIAgentLoadDCmd::execute(DCmdSource source, TRAPS) { 297 298 if (_libpath.value() == nullptr) { 299 output()->print_cr("JVMTI.agent_load dcmd needs library path."); 300 return; 301 } 302 303 char *suffix = strrchr(_libpath.value(), '.'); 304 bool is_java_agent = (suffix != nullptr) && (strncmp(".jar", suffix, 4) == 0); 305 306 if (is_java_agent) { 307 if (_option.value() == nullptr) { 308 JvmtiAgentList::load_agent("instrument", false, _libpath.value(), output()); 309 } else { 310 size_t opt_len = strlen(_libpath.value()) + strlen(_option.value()) + 2; 311 if (opt_len > 4096) { 312 output()->print_cr("JVMTI agent attach failed: Options is too long."); 313 return; 314 } 315 316 char *opt = (char *)os::malloc(opt_len, mtInternal); 317 if (opt == nullptr) { 318 output()->print_cr("JVMTI agent attach failed: " 319 "Could not allocate " SIZE_FORMAT " bytes for argument.", 320 opt_len); 321 return; 322 } 323 324 jio_snprintf(opt, opt_len, "%s=%s", _libpath.value(), _option.value()); 325 JvmtiAgentList::load_agent("instrument", false, opt, output()); 326 327 os::free(opt); 328 } 329 } else { 330 JvmtiAgentList::load_agent(_libpath.value(), true, _option.value(), output()); 331 } 332 } 333 334 #endif // INCLUDE_JVMTI 335 #endif // INCLUDE_SERVICES 336 337 void PrintSystemPropertiesDCmd::execute(DCmdSource source, TRAPS) { 338 // load VMSupport 339 Symbol* klass = vmSymbols::jdk_internal_vm_VMSupport(); 340 Klass* k = SystemDictionary::resolve_or_fail(klass, true, CHECK); 341 InstanceKlass* ik = InstanceKlass::cast(k); 342 if (ik->should_be_initialized()) { 343 ik->initialize(THREAD); 344 } 345 if (HAS_PENDING_EXCEPTION) { 346 java_lang_Throwable::print(PENDING_EXCEPTION, output()); 347 output()->cr(); 348 CLEAR_PENDING_EXCEPTION; 349 return; 350 } 351 352 // invoke the serializePropertiesToByteArray method 353 JavaValue result(T_OBJECT); 354 JavaCallArguments args; 355 356 Symbol* signature = vmSymbols::void_byte_array_signature(); 357 JavaCalls::call_static(&result, 358 ik, 359 vmSymbols::serializePropertiesToByteArray_name(), 360 signature, 361 &args, 362 THREAD); 363 if (HAS_PENDING_EXCEPTION) { 364 java_lang_Throwable::print(PENDING_EXCEPTION, output()); 365 output()->cr(); 366 CLEAR_PENDING_EXCEPTION; 367 return; 368 } 369 370 // The result should be a [B 371 oop res = result.get_oop(); 372 assert(res->is_typeArray(), "just checking"); 373 assert(TypeArrayKlass::cast(res->klass())->element_type() == T_BYTE, "just checking"); 374 375 // copy the bytes to the output stream 376 typeArrayOop ba = typeArrayOop(res); 377 jbyte* addr = typeArrayOop(res)->byte_at_addr(0); 378 output()->print_raw((const char*)addr, ba->length()); 379 } 380 381 VMUptimeDCmd::VMUptimeDCmd(outputStream* output, bool heap) : 382 DCmdWithParser(output, heap), 383 _date("-date", "Add a prefix with current date", "BOOLEAN", false, "false") { 384 _dcmdparser.add_dcmd_option(&_date); 385 } 386 387 void VMUptimeDCmd::execute(DCmdSource source, TRAPS) { 388 if (_date.value()) { 389 output()->date_stamp(true, "", ": "); 390 } 391 output()->time_stamp().update_to(tty->time_stamp().ticks()); 392 output()->stamp(); 393 output()->print_cr(" s"); 394 } 395 396 void VMInfoDCmd::execute(DCmdSource source, TRAPS) { 397 VMError::print_vm_info(_output); 398 } 399 400 void SystemGCDCmd::execute(DCmdSource source, TRAPS) { 401 Universe::heap()->collect(GCCause::_dcmd_gc_run); 402 } 403 404 void RunFinalizationDCmd::execute(DCmdSource source, TRAPS) { 405 Klass* k = vmClasses::System_klass(); 406 JavaValue result(T_VOID); 407 JavaCalls::call_static(&result, k, 408 vmSymbols::run_finalization_name(), 409 vmSymbols::void_method_signature(), CHECK); 410 } 411 412 void HeapInfoDCmd::execute(DCmdSource source, TRAPS) { 413 MutexLocker hl(THREAD, Heap_lock); 414 Universe::heap()->print_on(output()); 415 } 416 417 void FinalizerInfoDCmd::execute(DCmdSource source, TRAPS) { 418 ResourceMark rm(THREAD); 419 420 if (!InstanceKlass::is_finalization_enabled()) { 421 output()->print_cr("Finalization is disabled"); 422 return; 423 } 424 425 Klass* k = SystemDictionary::resolve_or_fail( 426 vmSymbols::finalizer_histogram_klass(), true, CHECK); 427 428 JavaValue result(T_ARRAY); 429 430 // We are calling lang.ref.FinalizerHistogram.getFinalizerHistogram() method 431 // and expect it to return array of FinalizerHistogramEntry as Object[] 432 433 JavaCalls::call_static(&result, k, 434 vmSymbols::get_finalizer_histogram_name(), 435 vmSymbols::void_finalizer_histogram_entry_array_signature(), CHECK); 436 437 objArrayOop result_oop = (objArrayOop) result.get_oop(); 438 if (result_oop->length() == 0) { 439 output()->print_cr("No instances waiting for finalization found"); 440 return; 441 } 442 443 oop foop = result_oop->obj_at(0); 444 InstanceKlass* ik = InstanceKlass::cast(foop->klass()); 445 446 fieldDescriptor count_fd, name_fd; 447 448 Klass* count_res = ik->find_field( 449 vmSymbols::finalizer_histogram_entry_count_field(), vmSymbols::int_signature(), &count_fd); 450 451 Klass* name_res = ik->find_field( 452 vmSymbols::finalizer_histogram_entry_name_field(), vmSymbols::string_signature(), &name_fd); 453 454 assert(count_res != nullptr && name_res != nullptr, "Unexpected layout of FinalizerHistogramEntry"); 455 456 output()->print_cr("Unreachable instances waiting for finalization"); 457 output()->print_cr("#instances class name"); 458 output()->print_cr("-----------------------"); 459 460 for (int i = 0; i < result_oop->length(); ++i) { 461 oop element_oop = result_oop->obj_at(i); 462 oop str_oop = element_oop->obj_field(name_fd.offset()); 463 char *name = java_lang_String::as_utf8_string(str_oop); 464 int count = element_oop->int_field(count_fd.offset()); 465 output()->print_cr("%10d %s", count, name); 466 } 467 } 468 469 #if INCLUDE_SERVICES // Heap dumping/inspection supported 470 HeapDumpDCmd::HeapDumpDCmd(outputStream* output, bool heap) : 471 DCmdWithParser(output, heap), 472 _filename("filename","Name of the dump file", "FILE",true), 473 _all("-all", "Dump all objects, including unreachable objects", 474 "BOOLEAN", false, "false"), 475 _gzip("-gz", "If specified, the heap dump is written in gzipped format " 476 "using the given compression level. 1 (recommended) is the fastest, " 477 "9 the strongest compression.", "INT", false, "1"), 478 _overwrite("-overwrite", "If specified, the dump file will be overwritten if it exists", 479 "BOOLEAN", false, "false"), 480 _parallel("-parallel", "Number of parallel threads to use for heap dump. The VM " 481 "will try to use the specified number of threads, but might use fewer.", 482 "INT", false, "1") { 483 _dcmdparser.add_dcmd_option(&_all); 484 _dcmdparser.add_dcmd_argument(&_filename); 485 _dcmdparser.add_dcmd_option(&_gzip); 486 _dcmdparser.add_dcmd_option(&_overwrite); 487 _dcmdparser.add_dcmd_option(&_parallel); 488 } 489 490 void HeapDumpDCmd::execute(DCmdSource source, TRAPS) { 491 jlong level = -1; // -1 means no compression. 492 jlong parallel = HeapDumper::default_num_of_dump_threads(); 493 494 if (_gzip.is_set()) { 495 level = _gzip.value(); 496 497 if (level < 1 || level > 9) { 498 output()->print_cr("Compression level out of range (1-9): " JLONG_FORMAT, level); 499 return; 500 } 501 } 502 503 if (_parallel.is_set()) { 504 parallel = _parallel.value(); 505 506 if (parallel < 0) { 507 output()->print_cr("Invalid number of parallel dump threads."); 508 return; 509 } else if (parallel == 0) { 510 // 0 implies to disable parallel heap dump, in such case, we use serial dump instead 511 parallel = 1; 512 } 513 } 514 515 // Request a full GC before heap dump if _all is false 516 // This helps reduces the amount of unreachable objects in the dump 517 // and makes it easier to browse. 518 HeapDumper dumper(!_all.value() /* request GC if _all is false*/); 519 dumper.dump(_filename.value(), output(), (int) level, _overwrite.value(), (uint)parallel); 520 } 521 522 ClassHistogramDCmd::ClassHistogramDCmd(outputStream* output, bool heap) : 523 DCmdWithParser(output, heap), 524 _all("-all", "Inspect all objects, including unreachable objects", 525 "BOOLEAN", false, "false"), 526 _parallel_thread_num("-parallel", 527 "Number of parallel threads to use for heap inspection. " 528 "0 (the default) means let the VM determine the number of threads to use. " 529 "1 means use one thread (disable parallelism). " 530 "For any other value the VM will try to use the specified number of " 531 "threads, but might use fewer.", 532 "INT", false, "0") { 533 _dcmdparser.add_dcmd_option(&_all); 534 _dcmdparser.add_dcmd_option(&_parallel_thread_num); 535 } 536 537 void ClassHistogramDCmd::execute(DCmdSource source, TRAPS) { 538 jlong num = _parallel_thread_num.value(); 539 if (num < 0) { 540 output()->print_cr("Parallel thread number out of range (>=0): " JLONG_FORMAT, num); 541 return; 542 } 543 uint parallel_thread_num = num == 0 544 ? MAX2<uint>(1, (uint)os::initial_active_processor_count() * 3 / 8) 545 : num; 546 VM_GC_HeapInspection heapop(output(), 547 !_all.value(), /* request full gc if false */ 548 parallel_thread_num); 549 VMThread::execute(&heapop); 550 } 551 552 #endif // INCLUDE_SERVICES 553 554 ThreadDumpDCmd::ThreadDumpDCmd(outputStream* output, bool heap) : 555 DCmdWithParser(output, heap), 556 _locks("-l", "print java.util.concurrent locks", "BOOLEAN", false, "false"), 557 _extended("-e", "print extended thread information", "BOOLEAN", false, "false") { 558 _dcmdparser.add_dcmd_option(&_locks); 559 _dcmdparser.add_dcmd_option(&_extended); 560 } 561 562 void ThreadDumpDCmd::execute(DCmdSource source, TRAPS) { 563 // thread stacks and JNI global handles 564 VM_PrintThreads op1(output(), _locks.value(), _extended.value(), true /* print JNI handle info */); 565 VMThread::execute(&op1); 566 567 // Deadlock detection 568 VM_FindDeadlocks op2(output()); 569 VMThread::execute(&op2); 570 } 571 572 // Enhanced JMX Agent support 573 574 JMXStartRemoteDCmd::JMXStartRemoteDCmd(outputStream *output, bool heap_allocated) : 575 576 DCmdWithParser(output, heap_allocated), 577 578 _config_file 579 ("config.file", 580 "set com.sun.management.config.file", "STRING", false), 581 582 _jmxremote_host 583 ("jmxremote.host", 584 "set com.sun.management.jmxremote.host", "STRING", false), 585 586 _jmxremote_port 587 ("jmxremote.port", 588 "set com.sun.management.jmxremote.port", "STRING", false), 589 590 _jmxremote_rmi_port 591 ("jmxremote.rmi.port", 592 "set com.sun.management.jmxremote.rmi.port", "STRING", false), 593 594 _jmxremote_ssl 595 ("jmxremote.ssl", 596 "set com.sun.management.jmxremote.ssl", "STRING", false), 597 598 _jmxremote_registry_ssl 599 ("jmxremote.registry.ssl", 600 "set com.sun.management.jmxremote.registry.ssl", "STRING", false), 601 602 _jmxremote_authenticate 603 ("jmxremote.authenticate", 604 "set com.sun.management.jmxremote.authenticate", "STRING", false), 605 606 _jmxremote_password_file 607 ("jmxremote.password.file", 608 "set com.sun.management.jmxremote.password.file", "STRING", false), 609 610 _jmxremote_access_file 611 ("jmxremote.access.file", 612 "set com.sun.management.jmxremote.access.file", "STRING", false), 613 614 _jmxremote_login_config 615 ("jmxremote.login.config", 616 "set com.sun.management.jmxremote.login.config", "STRING", false), 617 618 _jmxremote_ssl_enabled_cipher_suites 619 ("jmxremote.ssl.enabled.cipher.suites", 620 "set com.sun.management.jmxremote.ssl.enabled.cipher.suite", "STRING", false), 621 622 _jmxremote_ssl_enabled_protocols 623 ("jmxremote.ssl.enabled.protocols", 624 "set com.sun.management.jmxremote.ssl.enabled.protocols", "STRING", false), 625 626 _jmxremote_ssl_need_client_auth 627 ("jmxremote.ssl.need.client.auth", 628 "set com.sun.management.jmxremote.need.client.auth", "STRING", false), 629 630 _jmxremote_ssl_config_file 631 ("jmxremote.ssl.config.file", 632 "set com.sun.management.jmxremote.ssl.config.file", "STRING", false), 633 634 // JDP Protocol support 635 _jmxremote_autodiscovery 636 ("jmxremote.autodiscovery", 637 "set com.sun.management.jmxremote.autodiscovery", "STRING", false), 638 639 _jdp_port 640 ("jdp.port", 641 "set com.sun.management.jdp.port", "INT", false), 642 643 _jdp_address 644 ("jdp.address", 645 "set com.sun.management.jdp.address", "STRING", false), 646 647 _jdp_source_addr 648 ("jdp.source_addr", 649 "set com.sun.management.jdp.source_addr", "STRING", false), 650 651 _jdp_ttl 652 ("jdp.ttl", 653 "set com.sun.management.jdp.ttl", "INT", false), 654 655 _jdp_pause 656 ("jdp.pause", 657 "set com.sun.management.jdp.pause", "INT", false), 658 659 _jdp_name 660 ("jdp.name", 661 "set com.sun.management.jdp.name", "STRING", false) 662 663 { 664 _dcmdparser.add_dcmd_option(&_config_file); 665 _dcmdparser.add_dcmd_option(&_jmxremote_host); 666 _dcmdparser.add_dcmd_option(&_jmxremote_port); 667 _dcmdparser.add_dcmd_option(&_jmxremote_rmi_port); 668 _dcmdparser.add_dcmd_option(&_jmxremote_ssl); 669 _dcmdparser.add_dcmd_option(&_jmxremote_registry_ssl); 670 _dcmdparser.add_dcmd_option(&_jmxremote_authenticate); 671 _dcmdparser.add_dcmd_option(&_jmxremote_password_file); 672 _dcmdparser.add_dcmd_option(&_jmxremote_access_file); 673 _dcmdparser.add_dcmd_option(&_jmxremote_login_config); 674 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_enabled_cipher_suites); 675 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_enabled_protocols); 676 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_need_client_auth); 677 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_config_file); 678 _dcmdparser.add_dcmd_option(&_jmxremote_autodiscovery); 679 _dcmdparser.add_dcmd_option(&_jdp_port); 680 _dcmdparser.add_dcmd_option(&_jdp_address); 681 _dcmdparser.add_dcmd_option(&_jdp_source_addr); 682 _dcmdparser.add_dcmd_option(&_jdp_ttl); 683 _dcmdparser.add_dcmd_option(&_jdp_pause); 684 _dcmdparser.add_dcmd_option(&_jdp_name); 685 } 686 687 void JMXStartRemoteDCmd::execute(DCmdSource source, TRAPS) { 688 ResourceMark rm(THREAD); 689 HandleMark hm(THREAD); 690 691 // Load and initialize the jdk.internal.agent.Agent class 692 // invoke startRemoteManagementAgent(string) method to start 693 // the remote management server. 694 // throw java.lang.NoSuchMethodError if the method doesn't exist 695 696 loadAgentModule(CHECK); 697 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader()); 698 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::jdk_internal_agent_Agent(), loader, Handle(), true, CHECK); 699 700 JavaValue result(T_VOID); 701 702 // Pass all command line arguments to java as key=value,... 703 // All checks are done on java side 704 705 int len = 0; 706 stringStream options; 707 char comma[2] = {0,0}; 708 709 // Leave default values on Agent.class side and pass only 710 // arguments explicitly set by user. All arguments passed 711 // to jcmd override properties with the same name set by 712 // command line with -D or by managmenent.properties 713 // file. 714 #define PUT_OPTION(a) \ 715 do { \ 716 if ( (a).is_set() ){ \ 717 if ( *((a).type()) == 'I' ) { \ 718 options.print("%scom.sun.management.%s=" JLONG_FORMAT, comma, (a).name(), (jlong)((a).value())); \ 719 } else { \ 720 options.print("%scom.sun.management.%s=%s", comma, (a).name(), (char*)((a).value())); \ 721 } \ 722 comma[0] = ','; \ 723 }\ 724 } while(0); 725 726 727 PUT_OPTION(_config_file); 728 PUT_OPTION(_jmxremote_host); 729 PUT_OPTION(_jmxremote_port); 730 PUT_OPTION(_jmxremote_rmi_port); 731 PUT_OPTION(_jmxremote_ssl); 732 PUT_OPTION(_jmxremote_registry_ssl); 733 PUT_OPTION(_jmxremote_authenticate); 734 PUT_OPTION(_jmxremote_password_file); 735 PUT_OPTION(_jmxremote_access_file); 736 PUT_OPTION(_jmxremote_login_config); 737 PUT_OPTION(_jmxremote_ssl_enabled_cipher_suites); 738 PUT_OPTION(_jmxremote_ssl_enabled_protocols); 739 PUT_OPTION(_jmxremote_ssl_need_client_auth); 740 PUT_OPTION(_jmxremote_ssl_config_file); 741 PUT_OPTION(_jmxremote_autodiscovery); 742 PUT_OPTION(_jdp_port); 743 PUT_OPTION(_jdp_address); 744 PUT_OPTION(_jdp_source_addr); 745 PUT_OPTION(_jdp_ttl); 746 PUT_OPTION(_jdp_pause); 747 PUT_OPTION(_jdp_name); 748 749 #undef PUT_OPTION 750 751 Handle str = java_lang_String::create_from_str(options.as_string(), CHECK); 752 JavaCalls::call_static(&result, k, vmSymbols::startRemoteAgent_name(), vmSymbols::string_void_signature(), str, CHECK); 753 } 754 755 JMXStartLocalDCmd::JMXStartLocalDCmd(outputStream *output, bool heap_allocated) : 756 DCmd(output, heap_allocated) { 757 // do nothing 758 } 759 760 void JMXStartLocalDCmd::execute(DCmdSource source, TRAPS) { 761 ResourceMark rm(THREAD); 762 HandleMark hm(THREAD); 763 764 // Load and initialize the jdk.internal.agent.Agent class 765 // invoke startLocalManagementAgent(void) method to start 766 // the local management server 767 // throw java.lang.NoSuchMethodError if method doesn't exist 768 769 loadAgentModule(CHECK); 770 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader()); 771 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::jdk_internal_agent_Agent(), loader, Handle(), true, CHECK); 772 773 JavaValue result(T_VOID); 774 JavaCalls::call_static(&result, k, vmSymbols::startLocalAgent_name(), vmSymbols::void_method_signature(), CHECK); 775 } 776 777 void JMXStopRemoteDCmd::execute(DCmdSource source, TRAPS) { 778 ResourceMark rm(THREAD); 779 HandleMark hm(THREAD); 780 781 // Load and initialize the jdk.internal.agent.Agent class 782 // invoke stopRemoteManagementAgent method to stop the 783 // management server 784 // throw java.lang.NoSuchMethodError if method doesn't exist 785 786 loadAgentModule(CHECK); 787 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader()); 788 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::jdk_internal_agent_Agent(), loader, Handle(), true, CHECK); 789 790 JavaValue result(T_VOID); 791 JavaCalls::call_static(&result, k, vmSymbols::stopRemoteAgent_name(), vmSymbols::void_method_signature(), CHECK); 792 } 793 794 JMXStatusDCmd::JMXStatusDCmd(outputStream *output, bool heap_allocated) : 795 DCmd(output, heap_allocated) { 796 // do nothing 797 } 798 799 void JMXStatusDCmd::execute(DCmdSource source, TRAPS) { 800 ResourceMark rm(THREAD); 801 HandleMark hm(THREAD); 802 803 // Load and initialize the jdk.internal.agent.Agent class 804 // invoke getManagementAgentStatus() method to generate the status info 805 // throw java.lang.NoSuchMethodError if method doesn't exist 806 807 loadAgentModule(CHECK); 808 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader()); 809 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::jdk_internal_agent_Agent(), loader, Handle(), true, CHECK); 810 811 JavaValue result(T_OBJECT); 812 JavaCalls::call_static(&result, k, vmSymbols::getAgentStatus_name(), vmSymbols::void_string_signature(), CHECK); 813 814 jvalue* jv = (jvalue*) result.get_value_addr(); 815 oop str = cast_to_oop(jv->l); 816 if (str != nullptr) { 817 char* out = java_lang_String::as_utf8_string(str); 818 if (out) { 819 // Avoid using print_cr() because length maybe longer than O_BUFLEN 820 output()->print_raw_cr(out); 821 return; 822 } 823 } 824 output()->print_cr("Error obtaining management agent status"); 825 } 826 827 VMDynamicLibrariesDCmd::VMDynamicLibrariesDCmd(outputStream *output, bool heap_allocated) : 828 DCmd(output, heap_allocated) { 829 // do nothing 830 } 831 832 void VMDynamicLibrariesDCmd::execute(DCmdSource source, TRAPS) { 833 os::print_dll_info(output()); 834 output()->cr(); 835 } 836 837 void CompileQueueDCmd::execute(DCmdSource source, TRAPS) { 838 VM_PrintCompileQueue printCompileQueueOp(output()); 839 VMThread::execute(&printCompileQueueOp); 840 } 841 842 void CodeListDCmd::execute(DCmdSource source, TRAPS) { 843 CodeCache::print_codelist(output()); 844 } 845 846 void CodeCacheDCmd::execute(DCmdSource source, TRAPS) { 847 CodeCache::print_layout(output()); 848 } 849 850 #ifdef LINUX 851 PerfMapDCmd::PerfMapDCmd(outputStream* output, bool heap) : 852 DCmdWithParser(output, heap), 853 _filename("filename", "Name of the map file", "FILE", false, DEFAULT_PERFMAP_FILENAME) 854 { 855 _dcmdparser.add_dcmd_argument(&_filename); 856 } 857 858 void PerfMapDCmd::execute(DCmdSource source, TRAPS) { 859 CodeCache::write_perf_map(_filename.value(), output()); 860 } 861 #endif // LINUX 862 863 //---< BEGIN >--- CodeHeap State Analytics. 864 CodeHeapAnalyticsDCmd::CodeHeapAnalyticsDCmd(outputStream* output, bool heap) : 865 DCmdWithParser(output, heap), 866 _function("function", "Function to be performed (aggregate, UsedSpace, FreeSpace, MethodCount, MethodSpace, MethodAge, MethodNames, discard", "STRING", false, "all"), 867 _granularity("granularity", "Detail level - smaller value -> more detail", "INT", false, "4096") { 868 _dcmdparser.add_dcmd_argument(&_function); 869 _dcmdparser.add_dcmd_argument(&_granularity); 870 } 871 872 void CodeHeapAnalyticsDCmd::execute(DCmdSource source, TRAPS) { 873 jlong granularity = _granularity.value(); 874 if (granularity < 1) { 875 Exceptions::fthrow(THREAD_AND_LOCATION, vmSymbols::java_lang_IllegalArgumentException(), 876 "Invalid granularity value " JLONG_FORMAT ". Should be positive.\n", granularity); 877 return; 878 } 879 880 CompileBroker::print_heapinfo(output(), _function.value(), granularity); 881 } 882 //---< END >--- CodeHeap State Analytics. 883 884 EventLogDCmd::EventLogDCmd(outputStream* output, bool heap) : 885 DCmdWithParser(output, heap), 886 _log("log", "Name of log to be printed. If omitted, all logs are printed.", "STRING", false, nullptr), 887 _max("max", "Maximum number of events to be printed (newest first). If omitted, all events are printed.", "STRING", false, nullptr) 888 { 889 _dcmdparser.add_dcmd_option(&_log); 890 _dcmdparser.add_dcmd_option(&_max); 891 } 892 893 void EventLogDCmd::execute(DCmdSource source, TRAPS) { 894 const char* max_value = _max.value(); 895 int max = -1; 896 if (max_value != nullptr) { 897 char* endptr = nullptr; 898 if (!parse_integer(max_value, &max)) { 899 output()->print_cr("Invalid max option: \"%s\".", max_value); 900 return; 901 } 902 } 903 const char* log_name = _log.value(); 904 if (log_name != nullptr) { 905 Events::print_one(output(), log_name, max); 906 } else { 907 Events::print_all(output(), max); 908 } 909 } 910 911 void CompilerDirectivesPrintDCmd::execute(DCmdSource source, TRAPS) { 912 DirectivesStack::print(output()); 913 } 914 915 CompilerDirectivesAddDCmd::CompilerDirectivesAddDCmd(outputStream* output, bool heap) : 916 DCmdWithParser(output, heap), 917 _filename("filename","Name of the directives file", "STRING",true) { 918 _dcmdparser.add_dcmd_argument(&_filename); 919 } 920 921 void CompilerDirectivesAddDCmd::execute(DCmdSource source, TRAPS) { 922 DirectivesParser::parse_from_file(_filename.value(), output(), true); 923 } 924 925 void CompilerDirectivesRemoveDCmd::execute(DCmdSource source, TRAPS) { 926 DirectivesStack::pop(1); 927 } 928 929 void CompilerDirectivesClearDCmd::execute(DCmdSource source, TRAPS) { 930 DirectivesStack::clear(); 931 } 932 #if INCLUDE_SERVICES 933 ClassHierarchyDCmd::ClassHierarchyDCmd(outputStream* output, bool heap) : 934 DCmdWithParser(output, heap), 935 _print_interfaces("-i", "Inherited interfaces should be printed.", "BOOLEAN", false, "false"), 936 _print_subclasses("-s", "If a classname is specified, print its subclasses " 937 "in addition to its superclasses. Without this option only the " 938 "superclasses will be printed.", "BOOLEAN", false, "false"), 939 _classname("classname", "Name of class whose hierarchy should be printed. " 940 "If not specified, all class hierarchies are printed.", 941 "STRING", false) { 942 _dcmdparser.add_dcmd_option(&_print_interfaces); 943 _dcmdparser.add_dcmd_option(&_print_subclasses); 944 _dcmdparser.add_dcmd_argument(&_classname); 945 } 946 947 void ClassHierarchyDCmd::execute(DCmdSource source, TRAPS) { 948 VM_PrintClassHierarchy printClassHierarchyOp(output(), _print_interfaces.value(), 949 _print_subclasses.value(), _classname.value()); 950 VMThread::execute(&printClassHierarchyOp); 951 } 952 #endif 953 954 ClassesDCmd::ClassesDCmd(outputStream* output, bool heap) : 955 DCmdWithParser(output, heap), 956 _verbose("-verbose", 957 "Dump the detailed content of a Java class. " 958 "Some classes are annotated with flags: " 959 "F = has, or inherits, a non-empty finalize method, " 960 "f = has final method, " 961 "W = methods rewritten, " 962 "C = marked with @Contended annotation, " 963 "R = has been redefined, " 964 "S = is shared class", 965 "BOOLEAN", false, "false") { 966 _dcmdparser.add_dcmd_option(&_verbose); 967 } 968 969 class VM_PrintClasses : public VM_Operation { 970 private: 971 outputStream* _out; 972 bool _verbose; 973 public: 974 VM_PrintClasses(outputStream* out, bool verbose) : _out(out), _verbose(verbose) {} 975 976 virtual VMOp_Type type() const { return VMOp_PrintClasses; } 977 978 virtual void doit() { 979 PrintClassClosure closure(_out, _verbose); 980 ClassLoaderDataGraph::classes_do(&closure); 981 } 982 }; 983 984 void ClassesDCmd::execute(DCmdSource source, TRAPS) { 985 VM_PrintClasses vmop(output(), _verbose.value()); 986 VMThread::execute(&vmop); 987 } 988 989 #if INCLUDE_CDS 990 #define DEFAULT_CDS_ARCHIVE_FILENAME "java_pid%p_<subcmd>.jsa" 991 992 DumpSharedArchiveDCmd::DumpSharedArchiveDCmd(outputStream* output, bool heap) : 993 DCmdWithParser(output, heap), 994 _suboption("subcmd", "static_dump | dynamic_dump", "STRING", true), 995 _filename("filename", "Name of shared archive to be dumped", "FILE", false, 996 DEFAULT_CDS_ARCHIVE_FILENAME) 997 { 998 _dcmdparser.add_dcmd_argument(&_suboption); 999 _dcmdparser.add_dcmd_argument(&_filename); 1000 } 1001 1002 void DumpSharedArchiveDCmd::execute(DCmdSource source, TRAPS) { 1003 jboolean is_static; 1004 const char* scmd = _suboption.value(); 1005 1006 // The check for _filename.is_set() is because we don't want to use 1007 // DEFAULT_CDS_ARCHIVE_FILENAME, since it is meant as a description 1008 // of the default, not the actual default. 1009 const char* file = _filename.is_set() ? _filename.value() : nullptr; 1010 1011 if (strcmp(scmd, "static_dump") == 0) { 1012 is_static = JNI_TRUE; 1013 output()->print("Static dump: "); 1014 } else if (strcmp(scmd, "dynamic_dump") == 0) { 1015 is_static = JNI_FALSE; 1016 output()->print("Dynamic dump: "); 1017 if (!CDSConfig::is_using_archive()) { 1018 output()->print_cr("Dynamic dump is unsupported when base CDS archive is not loaded"); 1019 return; 1020 } 1021 if (!RecordDynamicDumpInfo) { 1022 output()->print_cr("Dump dynamic should run with -XX:+RecordDynamicDumpInfo"); 1023 return; 1024 } 1025 } else { 1026 output()->print_cr("Invalid command for VM.cds, valid input is static_dump or dynamic_dump"); 1027 return; 1028 } 1029 1030 // call CDS.dumpSharedArchive 1031 Handle fileh; 1032 if (file != nullptr) { 1033 fileh = java_lang_String::create_from_str(file, CHECK); 1034 } 1035 Symbol* cds_name = vmSymbols::jdk_internal_misc_CDS(); 1036 Klass* cds_klass = SystemDictionary::resolve_or_fail(cds_name, true /*throw error*/, CHECK); 1037 JavaValue result(T_OBJECT); 1038 JavaCallArguments args; 1039 args.push_int(is_static); 1040 args.push_oop(fileh); 1041 JavaCalls::call_static(&result, 1042 cds_klass, 1043 vmSymbols::dumpSharedArchive(), 1044 vmSymbols::dumpSharedArchive_signature(), 1045 &args, CHECK); 1046 if (!HAS_PENDING_EXCEPTION) { 1047 assert(result.get_type() == T_OBJECT, "Sanity check"); 1048 // result contains the archive name 1049 char* archive_name = java_lang_String::as_utf8_string(result.get_oop()); 1050 output()->print_cr("%s", archive_name); 1051 } 1052 } 1053 #endif // INCLUDE_CDS 1054 1055 ThreadDumpToFileDCmd::ThreadDumpToFileDCmd(outputStream* output, bool heap) : 1056 DCmdWithParser(output, heap), 1057 _overwrite("-overwrite", "May overwrite existing file", "BOOLEAN", false, "false"), 1058 _format("-format", "Output format (\"plain\" or \"json\")", "STRING", false, "plain"), 1059 _filepath("filepath", "The file path to the output file", "FILE", true) { 1060 _dcmdparser.add_dcmd_option(&_overwrite); 1061 _dcmdparser.add_dcmd_option(&_format); 1062 _dcmdparser.add_dcmd_argument(&_filepath); 1063 } 1064 1065 void ThreadDumpToFileDCmd::execute(DCmdSource source, TRAPS) { 1066 bool json = (_format.value() != nullptr) && (strcmp(_format.value(), "json") == 0); 1067 char* path = _filepath.value(); 1068 bool overwrite = _overwrite.value(); 1069 Symbol* name = (json) ? vmSymbols::dumpThreadsToJson_name() : vmSymbols::dumpThreads_name(); 1070 dumpToFile(name, vmSymbols::string_bool_byte_array_signature(), path, overwrite, CHECK); 1071 } 1072 1073 void ThreadDumpToFileDCmd::dumpToFile(Symbol* name, Symbol* signature, const char* path, bool overwrite, TRAPS) { 1074 ResourceMark rm(THREAD); 1075 HandleMark hm(THREAD); 1076 1077 Handle h_path = java_lang_String::create_from_str(path, CHECK); 1078 1079 Symbol* sym = vmSymbols::jdk_internal_vm_ThreadDumper(); 1080 Klass* k = SystemDictionary::resolve_or_fail(sym, true, CHECK); 1081 InstanceKlass* ik = InstanceKlass::cast(k); 1082 if (HAS_PENDING_EXCEPTION) { 1083 java_lang_Throwable::print(PENDING_EXCEPTION, output()); 1084 output()->cr(); 1085 CLEAR_PENDING_EXCEPTION; 1086 return; 1087 } 1088 1089 // invoke the ThreadDump method to dump to file 1090 JavaValue result(T_OBJECT); 1091 JavaCallArguments args; 1092 args.push_oop(h_path); 1093 args.push_int(overwrite ? JNI_TRUE : JNI_FALSE); 1094 JavaCalls::call_static(&result, 1095 k, 1096 name, 1097 signature, 1098 &args, 1099 THREAD); 1100 if (HAS_PENDING_EXCEPTION) { 1101 java_lang_Throwable::print(PENDING_EXCEPTION, output()); 1102 output()->cr(); 1103 CLEAR_PENDING_EXCEPTION; 1104 return; 1105 } 1106 1107 // check that result is byte array 1108 oop res = cast_to_oop(result.get_jobject()); 1109 assert(res->is_typeArray(), "just checking"); 1110 assert(TypeArrayKlass::cast(res->klass())->element_type() == T_BYTE, "just checking"); 1111 1112 // copy the bytes to the output stream 1113 typeArrayOop ba = typeArrayOop(res); 1114 jbyte* addr = typeArrayOop(res)->byte_at_addr(0); 1115 output()->print_raw((const char*)addr, ba->length()); 1116 } 1117 1118 CompilationMemoryStatisticDCmd::CompilationMemoryStatisticDCmd(outputStream* output, bool heap) : 1119 DCmdWithParser(output, heap), 1120 _human_readable("-H", "Human readable format", "BOOLEAN", false, "false"), 1121 _minsize("-s", "Minimum memory size", "MEMORY SIZE", false, "0") { 1122 _dcmdparser.add_dcmd_option(&_human_readable); 1123 _dcmdparser.add_dcmd_option(&_minsize); 1124 } 1125 1126 void CompilationMemoryStatisticDCmd::execute(DCmdSource source, TRAPS) { 1127 const bool human_readable = _human_readable.value(); 1128 const size_t minsize = _minsize.has_value() ? _minsize.value()._size : 0; 1129 CompilationMemoryStatistic::print_all_by_size(output(), human_readable, minsize); 1130 } 1131 1132 #if defined(LINUX) || defined(_WIN64) 1133 1134 SystemMapDCmd::SystemMapDCmd(outputStream* output, bool heap) : DCmd(output, heap) {} 1135 1136 void SystemMapDCmd::execute(DCmdSource source, TRAPS) { 1137 MemMapPrinter::print_all_mappings(output()); 1138 } 1139 1140 static constexpr char default_filename[] = "vm_memory_map_%p.txt"; 1141 1142 SystemDumpMapDCmd::SystemDumpMapDCmd(outputStream* output, bool heap) : 1143 DCmdWithParser(output, heap), 1144 _filename("-F", "file path", "FILE", false, default_filename) { 1145 _dcmdparser.add_dcmd_option(&_filename); 1146 } 1147 1148 void SystemDumpMapDCmd::execute(DCmdSource source, TRAPS) { 1149 const char* name = _filename.value(); 1150 if (name == nullptr || name[0] == 0) { 1151 output()->print_cr("filename is empty or not specified. No file written"); 1152 return; 1153 } 1154 fileStream fs(name); 1155 if (fs.is_open()) { 1156 if (!MemTracker::enabled()) { 1157 output()->print_cr("(NMT is disabled, will not annotate mappings)."); 1158 } 1159 MemMapPrinter::print_all_mappings(&fs); 1160 // For the readers convenience, resolve path name. 1161 char tmp[JVM_MAXPATHLEN]; 1162 const char* absname = os::realpath(name, tmp, sizeof(tmp)); 1163 name = absname != nullptr ? absname : name; 1164 output()->print_cr("Memory map dumped to \"%s\".", name); 1165 } else { 1166 output()->print_cr("Failed to open \"%s\" for writing (%s).", name, os::strerror(errno)); 1167 } 1168 } 1169 1170 #endif // LINUX