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