1 /* 2 * Copyright (c) 2011, 2023, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "cds/cds_globals.hpp" 27 #include "classfile/classLoaderDataGraph.hpp" 28 #include "classfile/classLoaderHierarchyDCmd.hpp" 29 #include "classfile/classLoaderStats.hpp" 30 #include "classfile/javaClasses.hpp" 31 #include "classfile/systemDictionary.hpp" 32 #include "classfile/vmClasses.hpp" 33 #include "code/codeCache.hpp" 34 #include "compiler/compilationMemoryStatistic.hpp" 35 #include "compiler/compiler_globals.hpp" 36 #include "compiler/compileBroker.hpp" 37 #include "compiler/directivesParser.hpp" 38 #include "gc/shared/gcVMOperations.hpp" 39 #include "jvm.h" 40 #include "memory/metaspace/metaspaceDCmd.hpp" 41 #include "memory/resourceArea.hpp" 42 #include "memory/universe.hpp" 43 #include "nmt/memMapPrinter.hpp" 44 #include "nmt/memTracker.hpp" 45 #include "nmt/nmtDCmd.hpp" 46 #include "oops/instanceKlass.hpp" 47 #include "oops/objArrayOop.inline.hpp" 48 #include "oops/oop.inline.hpp" 49 #include "oops/typeArrayOop.inline.hpp" 50 #include "prims/jvmtiAgentList.hpp" 51 #include "runtime/fieldDescriptor.inline.hpp" 52 #include "runtime/flags/jvmFlag.hpp" 53 #include "runtime/handles.inline.hpp" 54 #include "runtime/interfaceSupport.inline.hpp" 55 #include "runtime/javaCalls.hpp" 56 #include "runtime/jniHandles.hpp" 57 #include "runtime/os.hpp" 58 #include "runtime/vmOperations.hpp" 59 #include "runtime/vm_version.hpp" 60 #include "services/diagnosticArgument.hpp" 61 #include "services/diagnosticCommand.hpp" 62 #include "services/diagnosticFramework.hpp" 63 #include "services/heapDumper.hpp" 64 #include "services/management.hpp" 65 #include "services/writeableFlags.hpp" 66 #include "utilities/debug.hpp" 67 #include "utilities/events.hpp" 68 #include "utilities/formatBuffer.hpp" 69 #include "utilities/macros.hpp" 70 #include "utilities/parseInteger.hpp" 71 #ifdef LINUX 72 #include "os_posix.hpp" 73 #include "mallocInfoDcmd.hpp" 74 #include "trimCHeapDCmd.hpp" 75 #include <errno.h> 76 #endif 77 78 static void loadAgentModule(TRAPS) { 79 ResourceMark rm(THREAD); 80 HandleMark hm(THREAD); 81 82 JavaValue result(T_OBJECT); 83 Handle h_module_name = java_lang_String::create_from_str("jdk.management.agent", CHECK); 84 JavaCalls::call_static(&result, 85 vmClasses::module_Modules_klass(), 86 vmSymbols::loadModule_name(), 87 vmSymbols::loadModule_signature(), 88 h_module_name, 89 THREAD); 90 } 91 92 void DCmd::register_dcmds(){ 93 // Registration of the diagnostic commands 94 // First argument specifies which interfaces will export the command 95 // Second argument specifies if the command is enabled 96 // Third argument specifies if the command is hidden 97 uint32_t full_export = DCmd_Source_Internal | DCmd_Source_AttachAPI 98 | DCmd_Source_MBean; 99 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<HelpDCmd>(full_export, true, false)); 100 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VersionDCmd>(full_export, true, false)); 101 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CommandLineDCmd>(full_export, true, false)); 102 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<PrintSystemPropertiesDCmd>(full_export, true, false)); 103 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<PrintVMFlagsDCmd>(full_export, true, false)); 104 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SetVMFlagDCmd>(full_export, true, false)); 105 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VMDynamicLibrariesDCmd>(full_export, true, false)); 106 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VMUptimeDCmd>(full_export, true, false)); 107 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VMInfoDCmd>(full_export, true, false)); 108 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SystemGCDCmd>(full_export, true, false)); 109 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<RunFinalizationDCmd>(full_export, true, false)); 110 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<HeapInfoDCmd>(full_export, true, false)); 111 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<FinalizerInfoDCmd>(full_export, true, false)); 112 #if INCLUDE_SERVICES 113 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<HeapDumpDCmd>(DCmd_Source_Internal | DCmd_Source_AttachAPI, true, false)); 114 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassHistogramDCmd>(full_export, true, false)); 115 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SystemDictionaryDCmd>(full_export, true, false)); 116 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassHierarchyDCmd>(full_export, true, false)); 117 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassesDCmd>(full_export, true, false)); 118 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SymboltableDCmd>(full_export, true, false)); 119 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<StringtableDCmd>(full_export, true, false)); 120 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<metaspace::MetaspaceDCmd>(full_export, true, false)); 121 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<EventLogDCmd>(full_export, true, false)); 122 #if INCLUDE_JVMTI // Both JVMTI and SERVICES have to be enabled to have this dcmd 123 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JVMTIAgentLoadDCmd>(full_export, true, false)); 124 #endif // INCLUDE_JVMTI 125 #endif // INCLUDE_SERVICES 126 #if INCLUDE_JVMTI 127 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JVMTIDataDumpDCmd>(full_export, true, false)); 128 #endif // INCLUDE_JVMTI 129 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ThreadDumpDCmd>(full_export, true, false)); 130 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ThreadDumpToFileDCmd>(full_export, true, false)); 131 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassLoaderStatsDCmd>(full_export, true, false)); 132 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassLoaderHierarchyDCmd>(full_export, true, false)); 133 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompileQueueDCmd>(full_export, true, false)); 134 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CodeListDCmd>(full_export, true, false)); 135 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CodeCacheDCmd>(full_export, true, false)); 136 #ifdef LINUX 137 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<PerfMapDCmd>(full_export, true, false)); 138 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<TrimCLibcHeapDCmd>(full_export, true, false)); 139 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<MallocInfoDcmd>(full_export, true, false)); 140 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SystemMapDCmd>(full_export, true,false)); 141 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SystemDumpMapDCmd>(full_export, true,false)); 142 #endif // LINUX 143 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CodeHeapAnalyticsDCmd>(full_export, true, false)); 144 145 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesPrintDCmd>(full_export, true, false)); 146 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesAddDCmd>(full_export, true, false)); 147 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesRemoveDCmd>(full_export, true, false)); 148 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesClearDCmd>(full_export, true, false)); 149 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilationMemoryStatisticDCmd>(full_export, true, false)); 150 151 // Enhanced JMX Agent Support 152 // These commands won't be exported via the DiagnosticCommandMBean until an 153 // appropriate permission is created for them 154 uint32_t jmx_agent_export_flags = DCmd_Source_Internal | DCmd_Source_AttachAPI; 155 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStartRemoteDCmd>(jmx_agent_export_flags, true,false)); 156 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStartLocalDCmd>(jmx_agent_export_flags, true,false)); 157 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStopRemoteDCmd>(jmx_agent_export_flags, true,false)); 158 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStatusDCmd>(jmx_agent_export_flags, true,false)); 159 160 // Debug on cmd (only makes sense with JVMTI since the agentlib needs it). 161 #if INCLUDE_JVMTI 162 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<DebugOnCmdStartDCmd>(full_export, true, true)); 163 #endif // INCLUDE_JVMTI 164 165 #if INCLUDE_CDS 166 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<DumpSharedArchiveDCmd>(full_export, true, false)); 167 #endif // INCLUDE_CDS 168 169 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<NMTDCmd>(full_export, true, false)); 170 } 171 172 HelpDCmd::HelpDCmd(outputStream* output, bool heap) : DCmdWithParser(output, heap), 173 _all("-all", "Show help for all commands", "BOOLEAN", false, "false"), 174 _cmd("command name", "The name of the command for which we want help", 175 "STRING", false) { 176 _dcmdparser.add_dcmd_option(&_all); 177 _dcmdparser.add_dcmd_argument(&_cmd); 178 }; 179 180 181 static int compare_strings(const char** s1, const char** s2) { 182 return ::strcmp(*s1, *s2); 183 } 184 185 void HelpDCmd::execute(DCmdSource source, TRAPS) { 186 if (_all.value()) { 187 GrowableArray<const char*>* cmd_list = DCmdFactory::DCmd_list(source); 188 cmd_list->sort(compare_strings); 189 for (int i = 0; i < cmd_list->length(); i++) { 190 DCmdFactory* factory = DCmdFactory::factory(source, cmd_list->at(i), 191 strlen(cmd_list->at(i))); 192 output()->print_cr("%s%s", factory->name(), 193 factory->is_enabled() ? "" : " [disabled]"); 194 output()->print_cr("\t%s", factory->description()); 195 output()->cr(); 196 factory = factory->next(); 197 } 198 } else if (_cmd.has_value()) { 199 DCmd* cmd = nullptr; 200 DCmdFactory* factory = DCmdFactory::factory(source, _cmd.value(), 201 strlen(_cmd.value())); 202 if (factory != nullptr) { 203 output()->print_cr("%s%s", factory->name(), 204 factory->is_enabled() ? "" : " [disabled]"); 205 output()->print_cr("%s", factory->description()); 206 output()->print_cr("\nImpact: %s", factory->impact()); 207 output()->cr(); 208 cmd = factory->create_resource_instance(output()); 209 if (cmd != nullptr) { 210 DCmdMark mark(cmd); 211 cmd->print_help(factory->name()); 212 } 213 } else { 214 output()->print_cr("Help unavailable : '%s' : No such command", _cmd.value()); 215 } 216 } else { 217 output()->print_cr("The following commands are available:"); 218 GrowableArray<const char *>* cmd_list = DCmdFactory::DCmd_list(source); 219 cmd_list->sort(compare_strings); 220 for (int i = 0; i < cmd_list->length(); i++) { 221 DCmdFactory* factory = DCmdFactory::factory(source, cmd_list->at(i), 222 strlen(cmd_list->at(i))); 223 output()->print_cr("%s%s", factory->name(), 224 factory->is_enabled() ? "" : " [disabled]"); 225 factory = factory->_next; 226 } 227 output()->print_cr("\nFor more information about a specific command use 'help <command>'."); 228 } 229 } 230 231 void VersionDCmd::execute(DCmdSource source, TRAPS) { 232 output()->print_cr("%s version %s", VM_Version::vm_name(), 233 VM_Version::vm_release()); 234 JDK_Version jdk_version = JDK_Version::current(); 235 if (jdk_version.patch_version() > 0) { 236 output()->print_cr("JDK %d.%d.%d.%d", jdk_version.major_version(), 237 jdk_version.minor_version(), jdk_version.security_version(), 238 jdk_version.patch_version()); 239 } else { 240 output()->print_cr("JDK %d.%d.%d", jdk_version.major_version(), 241 jdk_version.minor_version(), jdk_version.security_version()); 242 } 243 } 244 245 PrintVMFlagsDCmd::PrintVMFlagsDCmd(outputStream* output, bool heap) : 246 DCmdWithParser(output, heap), 247 _all("-all", "Print all flags supported by the VM", "BOOLEAN", false, "false") { 248 _dcmdparser.add_dcmd_option(&_all); 249 } 250 251 void PrintVMFlagsDCmd::execute(DCmdSource source, TRAPS) { 252 if (_all.value()) { 253 JVMFlag::printFlags(output(), true); 254 } else { 255 JVMFlag::printSetFlags(output()); 256 } 257 } 258 259 SetVMFlagDCmd::SetVMFlagDCmd(outputStream* output, bool heap) : 260 DCmdWithParser(output, heap), 261 _flag("flag name", "The name of the flag we want to set", 262 "STRING", true), 263 _value("string value", "The value we want to set", "STRING", false) { 264 _dcmdparser.add_dcmd_argument(&_flag); 265 _dcmdparser.add_dcmd_argument(&_value); 266 } 267 268 void SetVMFlagDCmd::execute(DCmdSource source, TRAPS) { 269 const char* val = nullptr; 270 if (_value.value() != nullptr) { 271 val = _value.value(); 272 } 273 274 FormatBuffer<80> err_msg("%s", ""); 275 int ret = WriteableFlags::set_flag(_flag.value(), val, JVMFlagOrigin::MANAGEMENT, err_msg); 276 277 if (ret != JVMFlag::SUCCESS) { 278 output()->print_cr("%s", err_msg.buffer()); 279 } 280 } 281 282 void JVMTIDataDumpDCmd::execute(DCmdSource source, TRAPS) { 283 if (JvmtiExport::should_post_data_dump()) { 284 JvmtiExport::post_data_dump(); 285 } 286 } 287 288 #if INCLUDE_SERVICES 289 #if INCLUDE_JVMTI 290 JVMTIAgentLoadDCmd::JVMTIAgentLoadDCmd(outputStream* output, bool heap) : 291 DCmdWithParser(output, heap), 292 _libpath("library path", "Absolute path of the JVMTI agent to load.", 293 "STRING", true), 294 _option("agent option", "Option string to pass the agent.", "STRING", false) { 295 _dcmdparser.add_dcmd_argument(&_libpath); 296 _dcmdparser.add_dcmd_argument(&_option); 297 } 298 299 void JVMTIAgentLoadDCmd::execute(DCmdSource source, TRAPS) { 300 301 if (_libpath.value() == nullptr) { 302 output()->print_cr("JVMTI.agent_load dcmd needs library path."); 303 return; 304 } 305 306 char *suffix = strrchr(_libpath.value(), '.'); 307 bool is_java_agent = (suffix != nullptr) && (strncmp(".jar", suffix, 4) == 0); 308 309 if (is_java_agent) { 310 if (_option.value() == nullptr) { 311 JvmtiAgentList::load_agent("instrument", "false", _libpath.value(), output()); 312 } else { 313 size_t opt_len = strlen(_libpath.value()) + strlen(_option.value()) + 2; 314 if (opt_len > 4096) { 315 output()->print_cr("JVMTI agent attach failed: Options is too long."); 316 return; 317 } 318 319 char *opt = (char *)os::malloc(opt_len, mtInternal); 320 if (opt == nullptr) { 321 output()->print_cr("JVMTI agent attach failed: " 322 "Could not allocate " SIZE_FORMAT " bytes for argument.", 323 opt_len); 324 return; 325 } 326 327 jio_snprintf(opt, opt_len, "%s=%s", _libpath.value(), _option.value()); 328 JvmtiAgentList::load_agent("instrument", "false", opt, output()); 329 330 os::free(opt); 331 } 332 } else { 333 JvmtiAgentList::load_agent(_libpath.value(), "true", _option.value(), output()); 334 } 335 } 336 337 #endif // INCLUDE_JVMTI 338 #endif // INCLUDE_SERVICES 339 340 void PrintSystemPropertiesDCmd::execute(DCmdSource source, TRAPS) { 341 // load VMSupport 342 Symbol* klass = vmSymbols::jdk_internal_vm_VMSupport(); 343 Klass* k = SystemDictionary::resolve_or_fail(klass, true, CHECK); 344 InstanceKlass* ik = InstanceKlass::cast(k); 345 if (ik->should_be_initialized()) { 346 ik->initialize(THREAD); 347 } 348 if (HAS_PENDING_EXCEPTION) { 349 java_lang_Throwable::print(PENDING_EXCEPTION, output()); 350 output()->cr(); 351 CLEAR_PENDING_EXCEPTION; 352 return; 353 } 354 355 // invoke the serializePropertiesToByteArray method 356 JavaValue result(T_OBJECT); 357 JavaCallArguments args; 358 359 Symbol* signature = vmSymbols::void_byte_array_signature(); 360 JavaCalls::call_static(&result, 361 ik, 362 vmSymbols::serializePropertiesToByteArray_name(), 363 signature, 364 &args, 365 THREAD); 366 if (HAS_PENDING_EXCEPTION) { 367 java_lang_Throwable::print(PENDING_EXCEPTION, output()); 368 output()->cr(); 369 CLEAR_PENDING_EXCEPTION; 370 return; 371 } 372 373 // The result should be a [B 374 oop res = result.get_oop(); 375 assert(res->is_typeArray(), "just checking"); 376 assert(TypeArrayKlass::cast(res->klass())->element_type() == T_BYTE, "just checking"); 377 378 // copy the bytes to the output stream 379 typeArrayOop ba = typeArrayOop(res); 380 jbyte* addr = typeArrayOop(res)->byte_at_addr(0); 381 output()->print_raw((const char*)addr, ba->length()); 382 } 383 384 VMUptimeDCmd::VMUptimeDCmd(outputStream* output, bool heap) : 385 DCmdWithParser(output, heap), 386 _date("-date", "Add a prefix with current date", "BOOLEAN", false, "false") { 387 _dcmdparser.add_dcmd_option(&_date); 388 } 389 390 void VMUptimeDCmd::execute(DCmdSource source, TRAPS) { 391 if (_date.value()) { 392 output()->date_stamp(true, "", ": "); 393 } 394 output()->time_stamp().update_to(tty->time_stamp().ticks()); 395 output()->stamp(); 396 output()->print_cr(" s"); 397 } 398 399 void VMInfoDCmd::execute(DCmdSource source, TRAPS) { 400 VMError::print_vm_info(_output); 401 } 402 403 void SystemGCDCmd::execute(DCmdSource source, TRAPS) { 404 Universe::heap()->collect(GCCause::_dcmd_gc_run); 405 } 406 407 void RunFinalizationDCmd::execute(DCmdSource source, TRAPS) { 408 Klass* k = vmClasses::System_klass(); 409 JavaValue result(T_VOID); 410 JavaCalls::call_static(&result, k, 411 vmSymbols::run_finalization_name(), 412 vmSymbols::void_method_signature(), CHECK); 413 } 414 415 void HeapInfoDCmd::execute(DCmdSource source, TRAPS) { 416 MutexLocker hl(THREAD, Heap_lock); 417 Universe::heap()->print_on(output()); 418 } 419 420 void FinalizerInfoDCmd::execute(DCmdSource source, TRAPS) { 421 ResourceMark rm(THREAD); 422 423 if (!InstanceKlass::is_finalization_enabled()) { 424 output()->print_cr("Finalization is disabled"); 425 return; 426 } 427 428 Klass* k = SystemDictionary::resolve_or_fail( 429 vmSymbols::finalizer_histogram_klass(), true, CHECK); 430 431 JavaValue result(T_ARRAY); 432 433 // We are calling lang.ref.FinalizerHistogram.getFinalizerHistogram() method 434 // and expect it to return array of FinalizerHistogramEntry as Object[] 435 436 JavaCalls::call_static(&result, k, 437 vmSymbols::get_finalizer_histogram_name(), 438 vmSymbols::void_finalizer_histogram_entry_array_signature(), CHECK); 439 440 objArrayOop result_oop = (objArrayOop) result.get_oop(); 441 if (result_oop->length() == 0) { 442 output()->print_cr("No instances waiting for finalization found"); 443 return; 444 } 445 446 oop foop = result_oop->obj_at(0); 447 InstanceKlass* ik = InstanceKlass::cast(foop->klass()); 448 449 fieldDescriptor count_fd, name_fd; 450 451 Klass* count_res = ik->find_field( 452 vmSymbols::finalizer_histogram_entry_count_field(), vmSymbols::int_signature(), &count_fd); 453 454 Klass* name_res = ik->find_field( 455 vmSymbols::finalizer_histogram_entry_name_field(), vmSymbols::string_signature(), &name_fd); 456 457 assert(count_res != nullptr && name_res != nullptr, "Unexpected layout of FinalizerHistogramEntry"); 458 459 output()->print_cr("Unreachable instances waiting for finalization"); 460 output()->print_cr("#instances class name"); 461 output()->print_cr("-----------------------"); 462 463 for (int i = 0; i < result_oop->length(); ++i) { 464 oop element_oop = result_oop->obj_at(i); 465 oop str_oop = element_oop->obj_field(name_fd.offset()); 466 char *name = java_lang_String::as_utf8_string(str_oop); 467 int count = element_oop->int_field(count_fd.offset()); 468 output()->print_cr("%10d %s", count, name); 469 } 470 } 471 472 #if INCLUDE_SERVICES // Heap dumping/inspection supported 473 HeapDumpDCmd::HeapDumpDCmd(outputStream* output, bool heap) : 474 DCmdWithParser(output, heap), 475 _filename("filename","Name of the dump file", "STRING",true), 476 _all("-all", "Dump all objects, including unreachable objects", 477 "BOOLEAN", false, "false"), 478 _gzip("-gz", "If specified, the heap dump is written in gzipped format " 479 "using the given compression level. 1 (recommended) is the fastest, " 480 "9 the strongest compression.", "INT", false, "1"), 481 _overwrite("-overwrite", "If specified, the dump file will be overwritten if it exists", 482 "BOOLEAN", false, "false"), 483 _parallel("-parallel", "Number of parallel threads to use for heap dump. The VM " 484 "will try to use the specified number of threads, but might use fewer.", 485 "INT", false, "1") { 486 _dcmdparser.add_dcmd_option(&_all); 487 _dcmdparser.add_dcmd_argument(&_filename); 488 _dcmdparser.add_dcmd_option(&_gzip); 489 _dcmdparser.add_dcmd_option(&_overwrite); 490 _dcmdparser.add_dcmd_option(&_parallel); 491 } 492 493 void HeapDumpDCmd::execute(DCmdSource source, TRAPS) { 494 jlong level = -1; // -1 means no compression. 495 jlong parallel = HeapDumper::default_num_of_dump_threads(); 496 497 if (_gzip.is_set()) { 498 level = _gzip.value(); 499 500 if (level < 1 || level > 9) { 501 output()->print_cr("Compression level out of range (1-9): " JLONG_FORMAT, level); 502 return; 503 } 504 } 505 506 if (_parallel.is_set()) { 507 parallel = _parallel.value(); 508 509 if (parallel < 0) { 510 output()->print_cr("Invalid number of parallel dump threads."); 511 return; 512 } else if (parallel == 0) { 513 // 0 implies to disable parallel heap dump, in such case, we use serial dump instead 514 parallel = 1; 515 } 516 } 517 518 // Request a full GC before heap dump if _all is false 519 // This helps reduces the amount of unreachable objects in the dump 520 // and makes it easier to browse. 521 HeapDumper dumper(!_all.value() /* request GC if _all is false*/); 522 dumper.dump(_filename.value(), output(), (int) level, _overwrite.value(), (uint)parallel); 523 } 524 525 ClassHistogramDCmd::ClassHistogramDCmd(outputStream* output, bool heap) : 526 DCmdWithParser(output, heap), 527 _all("-all", "Inspect all objects, including unreachable objects", 528 "BOOLEAN", false, "false"), 529 _parallel_thread_num("-parallel", 530 "Number of parallel threads to use for heap inspection. " 531 "0 (the default) means let the VM determine the number of threads to use. " 532 "1 means use one thread (disable parallelism). " 533 "For any other value the VM will try to use the specified number of " 534 "threads, but might use fewer.", 535 "INT", false, "0") { 536 _dcmdparser.add_dcmd_option(&_all); 537 _dcmdparser.add_dcmd_option(&_parallel_thread_num); 538 } 539 540 void ClassHistogramDCmd::execute(DCmdSource source, TRAPS) { 541 jlong num = _parallel_thread_num.value(); 542 if (num < 0) { 543 output()->print_cr("Parallel thread number out of range (>=0): " JLONG_FORMAT, num); 544 return; 545 } 546 uint parallel_thread_num = num == 0 547 ? MAX2<uint>(1, (uint)os::initial_active_processor_count() * 3 / 8) 548 : num; 549 VM_GC_HeapInspection heapop(output(), 550 !_all.value(), /* request full gc if false */ 551 parallel_thread_num); 552 VMThread::execute(&heapop); 553 } 554 555 #endif // INCLUDE_SERVICES 556 557 ThreadDumpDCmd::ThreadDumpDCmd(outputStream* output, bool heap) : 558 DCmdWithParser(output, heap), 559 _locks("-l", "print java.util.concurrent locks", "BOOLEAN", false, "false"), 560 _extended("-e", "print extended thread information", "BOOLEAN", false, "false") { 561 _dcmdparser.add_dcmd_option(&_locks); 562 _dcmdparser.add_dcmd_option(&_extended); 563 } 564 565 void ThreadDumpDCmd::execute(DCmdSource source, TRAPS) { 566 // thread stacks and JNI global handles 567 VM_PrintThreads op1(output(), _locks.value(), _extended.value(), true /* print JNI handle info */); 568 VMThread::execute(&op1); 569 570 // Deadlock detection 571 VM_FindDeadlocks op2(output()); 572 VMThread::execute(&op2); 573 } 574 575 // Enhanced JMX Agent support 576 577 JMXStartRemoteDCmd::JMXStartRemoteDCmd(outputStream *output, bool heap_allocated) : 578 579 DCmdWithParser(output, heap_allocated), 580 581 _config_file 582 ("config.file", 583 "set com.sun.management.config.file", "STRING", false), 584 585 _jmxremote_host 586 ("jmxremote.host", 587 "set com.sun.management.jmxremote.host", "STRING", false), 588 589 _jmxremote_port 590 ("jmxremote.port", 591 "set com.sun.management.jmxremote.port", "STRING", false), 592 593 _jmxremote_rmi_port 594 ("jmxremote.rmi.port", 595 "set com.sun.management.jmxremote.rmi.port", "STRING", false), 596 597 _jmxremote_ssl 598 ("jmxremote.ssl", 599 "set com.sun.management.jmxremote.ssl", "STRING", false), 600 601 _jmxremote_registry_ssl 602 ("jmxremote.registry.ssl", 603 "set com.sun.management.jmxremote.registry.ssl", "STRING", false), 604 605 _jmxremote_authenticate 606 ("jmxremote.authenticate", 607 "set com.sun.management.jmxremote.authenticate", "STRING", false), 608 609 _jmxremote_password_file 610 ("jmxremote.password.file", 611 "set com.sun.management.jmxremote.password.file", "STRING", false), 612 613 _jmxremote_access_file 614 ("jmxremote.access.file", 615 "set com.sun.management.jmxremote.access.file", "STRING", false), 616 617 _jmxremote_login_config 618 ("jmxremote.login.config", 619 "set com.sun.management.jmxremote.login.config", "STRING", false), 620 621 _jmxremote_ssl_enabled_cipher_suites 622 ("jmxremote.ssl.enabled.cipher.suites", 623 "set com.sun.management.jmxremote.ssl.enabled.cipher.suite", "STRING", false), 624 625 _jmxremote_ssl_enabled_protocols 626 ("jmxremote.ssl.enabled.protocols", 627 "set com.sun.management.jmxremote.ssl.enabled.protocols", "STRING", false), 628 629 _jmxremote_ssl_need_client_auth 630 ("jmxremote.ssl.need.client.auth", 631 "set com.sun.management.jmxremote.need.client.auth", "STRING", false), 632 633 _jmxremote_ssl_config_file 634 ("jmxremote.ssl.config.file", 635 "set com.sun.management.jmxremote.ssl.config.file", "STRING", false), 636 637 // JDP Protocol support 638 _jmxremote_autodiscovery 639 ("jmxremote.autodiscovery", 640 "set com.sun.management.jmxremote.autodiscovery", "STRING", false), 641 642 _jdp_port 643 ("jdp.port", 644 "set com.sun.management.jdp.port", "INT", false), 645 646 _jdp_address 647 ("jdp.address", 648 "set com.sun.management.jdp.address", "STRING", false), 649 650 _jdp_source_addr 651 ("jdp.source_addr", 652 "set com.sun.management.jdp.source_addr", "STRING", false), 653 654 _jdp_ttl 655 ("jdp.ttl", 656 "set com.sun.management.jdp.ttl", "INT", false), 657 658 _jdp_pause 659 ("jdp.pause", 660 "set com.sun.management.jdp.pause", "INT", false), 661 662 _jdp_name 663 ("jdp.name", 664 "set com.sun.management.jdp.name", "STRING", false) 665 666 { 667 _dcmdparser.add_dcmd_option(&_config_file); 668 _dcmdparser.add_dcmd_option(&_jmxremote_host); 669 _dcmdparser.add_dcmd_option(&_jmxremote_port); 670 _dcmdparser.add_dcmd_option(&_jmxremote_rmi_port); 671 _dcmdparser.add_dcmd_option(&_jmxremote_ssl); 672 _dcmdparser.add_dcmd_option(&_jmxremote_registry_ssl); 673 _dcmdparser.add_dcmd_option(&_jmxremote_authenticate); 674 _dcmdparser.add_dcmd_option(&_jmxremote_password_file); 675 _dcmdparser.add_dcmd_option(&_jmxremote_access_file); 676 _dcmdparser.add_dcmd_option(&_jmxremote_login_config); 677 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_enabled_cipher_suites); 678 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_enabled_protocols); 679 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_need_client_auth); 680 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_config_file); 681 _dcmdparser.add_dcmd_option(&_jmxremote_autodiscovery); 682 _dcmdparser.add_dcmd_option(&_jdp_port); 683 _dcmdparser.add_dcmd_option(&_jdp_address); 684 _dcmdparser.add_dcmd_option(&_jdp_source_addr); 685 _dcmdparser.add_dcmd_option(&_jdp_ttl); 686 _dcmdparser.add_dcmd_option(&_jdp_pause); 687 _dcmdparser.add_dcmd_option(&_jdp_name); 688 } 689 690 void JMXStartRemoteDCmd::execute(DCmdSource source, TRAPS) { 691 ResourceMark rm(THREAD); 692 HandleMark hm(THREAD); 693 694 // Load and initialize the jdk.internal.agent.Agent class 695 // invoke startRemoteManagementAgent(string) method to start 696 // the remote management server. 697 // throw java.lang.NoSuchMethodError if the method doesn't exist 698 699 loadAgentModule(CHECK); 700 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader()); 701 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::jdk_internal_agent_Agent(), loader, Handle(), true, CHECK); 702 703 JavaValue result(T_VOID); 704 705 // Pass all command line arguments to java as key=value,... 706 // All checks are done on java side 707 708 int len = 0; 709 stringStream options; 710 char comma[2] = {0,0}; 711 712 // Leave default values on Agent.class side and pass only 713 // arguments explicitly set by user. All arguments passed 714 // to jcmd override properties with the same name set by 715 // command line with -D or by managmenent.properties 716 // file. 717 #define PUT_OPTION(a) \ 718 do { \ 719 if ( (a).is_set() ){ \ 720 if ( *((a).type()) == 'I' ) { \ 721 options.print("%scom.sun.management.%s=" JLONG_FORMAT, comma, (a).name(), (jlong)((a).value())); \ 722 } else { \ 723 options.print("%scom.sun.management.%s=%s", comma, (a).name(), (char*)((a).value())); \ 724 } \ 725 comma[0] = ','; \ 726 }\ 727 } while(0); 728 729 730 PUT_OPTION(_config_file); 731 PUT_OPTION(_jmxremote_host); 732 PUT_OPTION(_jmxremote_port); 733 PUT_OPTION(_jmxremote_rmi_port); 734 PUT_OPTION(_jmxremote_ssl); 735 PUT_OPTION(_jmxremote_registry_ssl); 736 PUT_OPTION(_jmxremote_authenticate); 737 PUT_OPTION(_jmxremote_password_file); 738 PUT_OPTION(_jmxremote_access_file); 739 PUT_OPTION(_jmxremote_login_config); 740 PUT_OPTION(_jmxremote_ssl_enabled_cipher_suites); 741 PUT_OPTION(_jmxremote_ssl_enabled_protocols); 742 PUT_OPTION(_jmxremote_ssl_need_client_auth); 743 PUT_OPTION(_jmxremote_ssl_config_file); 744 PUT_OPTION(_jmxremote_autodiscovery); 745 PUT_OPTION(_jdp_port); 746 PUT_OPTION(_jdp_address); 747 PUT_OPTION(_jdp_source_addr); 748 PUT_OPTION(_jdp_ttl); 749 PUT_OPTION(_jdp_pause); 750 PUT_OPTION(_jdp_name); 751 752 #undef PUT_OPTION 753 754 Handle str = java_lang_String::create_from_str(options.as_string(), CHECK); 755 JavaCalls::call_static(&result, k, vmSymbols::startRemoteAgent_name(), vmSymbols::string_void_signature(), str, CHECK); 756 } 757 758 JMXStartLocalDCmd::JMXStartLocalDCmd(outputStream *output, bool heap_allocated) : 759 DCmd(output, heap_allocated) { 760 // do nothing 761 } 762 763 void JMXStartLocalDCmd::execute(DCmdSource source, TRAPS) { 764 ResourceMark rm(THREAD); 765 HandleMark hm(THREAD); 766 767 // Load and initialize the jdk.internal.agent.Agent class 768 // invoke startLocalManagementAgent(void) method to start 769 // the local management server 770 // throw java.lang.NoSuchMethodError if method doesn't exist 771 772 loadAgentModule(CHECK); 773 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader()); 774 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::jdk_internal_agent_Agent(), loader, Handle(), true, CHECK); 775 776 JavaValue result(T_VOID); 777 JavaCalls::call_static(&result, k, vmSymbols::startLocalAgent_name(), vmSymbols::void_method_signature(), CHECK); 778 } 779 780 void JMXStopRemoteDCmd::execute(DCmdSource source, TRAPS) { 781 ResourceMark rm(THREAD); 782 HandleMark hm(THREAD); 783 784 // Load and initialize the jdk.internal.agent.Agent class 785 // invoke stopRemoteManagementAgent method to stop the 786 // management server 787 // throw java.lang.NoSuchMethodError if method doesn't exist 788 789 loadAgentModule(CHECK); 790 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader()); 791 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::jdk_internal_agent_Agent(), loader, Handle(), true, CHECK); 792 793 JavaValue result(T_VOID); 794 JavaCalls::call_static(&result, k, vmSymbols::stopRemoteAgent_name(), vmSymbols::void_method_signature(), CHECK); 795 } 796 797 JMXStatusDCmd::JMXStatusDCmd(outputStream *output, bool heap_allocated) : 798 DCmd(output, heap_allocated) { 799 // do nothing 800 } 801 802 void JMXStatusDCmd::execute(DCmdSource source, TRAPS) { 803 ResourceMark rm(THREAD); 804 HandleMark hm(THREAD); 805 806 // Load and initialize the jdk.internal.agent.Agent class 807 // invoke getManagementAgentStatus() method to generate the status info 808 // throw java.lang.NoSuchMethodError if method doesn't exist 809 810 loadAgentModule(CHECK); 811 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader()); 812 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::jdk_internal_agent_Agent(), loader, Handle(), true, CHECK); 813 814 JavaValue result(T_OBJECT); 815 JavaCalls::call_static(&result, k, vmSymbols::getAgentStatus_name(), vmSymbols::void_string_signature(), CHECK); 816 817 jvalue* jv = (jvalue*) result.get_value_addr(); 818 oop str = cast_to_oop(jv->l); 819 if (str != nullptr) { 820 char* out = java_lang_String::as_utf8_string(str); 821 if (out) { 822 // Avoid using print_cr() because length maybe longer than O_BUFLEN 823 output()->print_raw_cr(out); 824 return; 825 } 826 } 827 output()->print_cr("Error obtaining management agent status"); 828 } 829 830 VMDynamicLibrariesDCmd::VMDynamicLibrariesDCmd(outputStream *output, bool heap_allocated) : 831 DCmd(output, heap_allocated) { 832 // do nothing 833 } 834 835 void VMDynamicLibrariesDCmd::execute(DCmdSource source, TRAPS) { 836 os::print_dll_info(output()); 837 output()->cr(); 838 } 839 840 void CompileQueueDCmd::execute(DCmdSource source, TRAPS) { 841 VM_PrintCompileQueue printCompileQueueOp(output()); 842 VMThread::execute(&printCompileQueueOp); 843 } 844 845 void CodeListDCmd::execute(DCmdSource source, TRAPS) { 846 CodeCache::print_codelist(output()); 847 } 848 849 void CodeCacheDCmd::execute(DCmdSource source, TRAPS) { 850 CodeCache::print_layout(output()); 851 } 852 853 #ifdef LINUX 854 void PerfMapDCmd::execute(DCmdSource source, TRAPS) { 855 CodeCache::write_perf_map(); 856 } 857 #endif // LINUX 858 859 //---< BEGIN >--- CodeHeap State Analytics. 860 CodeHeapAnalyticsDCmd::CodeHeapAnalyticsDCmd(outputStream* output, bool heap) : 861 DCmdWithParser(output, heap), 862 _function("function", "Function to be performed (aggregate, UsedSpace, FreeSpace, MethodCount, MethodSpace, MethodAge, MethodNames, discard", "STRING", false, "all"), 863 _granularity("granularity", "Detail level - smaller value -> more detail", "INT", false, "4096") { 864 _dcmdparser.add_dcmd_argument(&_function); 865 _dcmdparser.add_dcmd_argument(&_granularity); 866 } 867 868 void CodeHeapAnalyticsDCmd::execute(DCmdSource source, TRAPS) { 869 jlong granularity = _granularity.value(); 870 if (granularity < 1) { 871 Exceptions::fthrow(THREAD_AND_LOCATION, vmSymbols::java_lang_IllegalArgumentException(), 872 "Invalid granularity value " JLONG_FORMAT ". Should be positive.\n", granularity); 873 return; 874 } 875 876 CompileBroker::print_heapinfo(output(), _function.value(), granularity); 877 } 878 //---< END >--- CodeHeap State Analytics. 879 880 EventLogDCmd::EventLogDCmd(outputStream* output, bool heap) : 881 DCmdWithParser(output, heap), 882 _log("log", "Name of log to be printed. If omitted, all logs are printed.", "STRING", false, nullptr), 883 _max("max", "Maximum number of events to be printed (newest first). If omitted, all events are printed.", "STRING", false, nullptr) 884 { 885 _dcmdparser.add_dcmd_option(&_log); 886 _dcmdparser.add_dcmd_option(&_max); 887 } 888 889 void EventLogDCmd::execute(DCmdSource source, TRAPS) { 890 const char* max_value = _max.value(); 891 int max = -1; 892 if (max_value != nullptr) { 893 char* endptr = nullptr; 894 int max; 895 if (!parse_integer(max_value, &max)) { 896 output()->print_cr("Invalid max option: \"%s\".", max_value); 897 return; 898 } 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.is_set()); 983 VMThread::execute(&vmop); 984 } 985 986 #if INCLUDE_CDS 987 DumpSharedArchiveDCmd::DumpSharedArchiveDCmd(outputStream* output, bool heap) : 988 DCmdWithParser(output, heap), 989 _suboption("subcmd", "static_dump | dynamic_dump", "STRING", true), 990 _filename("filename", "Name of shared archive to be dumped", "STRING", false) 991 { 992 _dcmdparser.add_dcmd_argument(&_suboption); 993 _dcmdparser.add_dcmd_argument(&_filename); 994 } 995 996 void DumpSharedArchiveDCmd::execute(DCmdSource source, TRAPS) { 997 jboolean is_static; 998 const char* scmd = _suboption.value(); 999 const char* file = _filename.value(); 1000 1001 if (strcmp(scmd, "static_dump") == 0) { 1002 is_static = JNI_TRUE; 1003 output()->print("Static dump: "); 1004 } else if (strcmp(scmd, "dynamic_dump") == 0) { 1005 is_static = JNI_FALSE; 1006 output()->print("Dynamic dump: "); 1007 if (!UseSharedSpaces) { 1008 output()->print_cr("Dynamic dump is unsupported when base CDS archive is not loaded"); 1009 return; 1010 } 1011 if (!RecordDynamicDumpInfo) { 1012 output()->print_cr("Dump dynamic should run with -XX:+RecordDynamicDumpInfo"); 1013 return; 1014 } 1015 } else { 1016 output()->print_cr("Invalid command for VM.cds, valid input is static_dump or dynamic_dump"); 1017 return; 1018 } 1019 1020 // call CDS.dumpSharedArchive 1021 Handle fileh; 1022 if (file != nullptr) { 1023 fileh = java_lang_String::create_from_str(_filename.value(), CHECK); 1024 } 1025 Symbol* cds_name = vmSymbols::jdk_internal_misc_CDS(); 1026 Klass* cds_klass = SystemDictionary::resolve_or_fail(cds_name, true /*throw error*/, CHECK); 1027 JavaValue result(T_OBJECT); 1028 JavaCallArguments args; 1029 args.push_int(is_static); 1030 args.push_oop(fileh); 1031 JavaCalls::call_static(&result, 1032 cds_klass, 1033 vmSymbols::dumpSharedArchive(), 1034 vmSymbols::dumpSharedArchive_signature(), 1035 &args, CHECK); 1036 if (!HAS_PENDING_EXCEPTION) { 1037 assert(result.get_type() == T_OBJECT, "Sanity check"); 1038 // result contains the archive name 1039 char* archive_name = java_lang_String::as_utf8_string(result.get_oop()); 1040 output()->print_cr("%s", archive_name); 1041 } 1042 } 1043 #endif // INCLUDE_CDS 1044 1045 #if INCLUDE_JVMTI 1046 extern "C" typedef char const* (JNICALL *debugInit_startDebuggingViaCommandPtr)(JNIEnv* env, jthread thread, char const** transport_name, 1047 char const** address, jboolean* first_start); 1048 static debugInit_startDebuggingViaCommandPtr dvc_start_ptr = nullptr; 1049 1050 void DebugOnCmdStartDCmd::execute(DCmdSource source, TRAPS) { 1051 char const* transport = nullptr; 1052 char const* addr = nullptr; 1053 jboolean is_first_start = JNI_FALSE; 1054 JavaThread* thread = THREAD; 1055 jthread jt = JNIHandles::make_local(thread->threadObj()); 1056 ThreadToNativeFromVM ttn(thread); 1057 const char *error = "Could not find jdwp agent."; 1058 1059 if (!dvc_start_ptr) { 1060 JvmtiAgentList::Iterator it = JvmtiAgentList::agents(); 1061 while (it.has_next()) { 1062 JvmtiAgent* agent = it.next(); 1063 if ((strcmp("jdwp", agent->name()) == 0) && (dvc_start_ptr == nullptr)) { 1064 char const* func = "debugInit_startDebuggingViaCommand"; 1065 dvc_start_ptr = (debugInit_startDebuggingViaCommandPtr) os::find_agent_function(agent, false, &func, 1); 1066 } 1067 } 1068 } 1069 1070 if (dvc_start_ptr) { 1071 error = dvc_start_ptr(thread->jni_environment(), jt, &transport, &addr, &is_first_start); 1072 } 1073 1074 if (error != nullptr) { 1075 output()->print_cr("Debugging has not been started: %s", error); 1076 } else { 1077 output()->print_cr(is_first_start ? "Debugging has been started." : "Debugging is already active."); 1078 output()->print_cr("Transport : %s", transport ? transport : "#unknown"); 1079 output()->print_cr("Address : %s", addr ? addr : "#unknown"); 1080 } 1081 } 1082 #endif // INCLUDE_JVMTI 1083 1084 ThreadDumpToFileDCmd::ThreadDumpToFileDCmd(outputStream* output, bool heap) : 1085 DCmdWithParser(output, heap), 1086 _overwrite("-overwrite", "May overwrite existing file", "BOOLEAN", false, "false"), 1087 _format("-format", "Output format (\"plain\" or \"json\")", "STRING", false, "plain"), 1088 _filepath("filepath", "The file path to the output file", "STRING", true) { 1089 _dcmdparser.add_dcmd_option(&_overwrite); 1090 _dcmdparser.add_dcmd_option(&_format); 1091 _dcmdparser.add_dcmd_argument(&_filepath); 1092 } 1093 1094 void ThreadDumpToFileDCmd::execute(DCmdSource source, TRAPS) { 1095 bool json = (_format.value() != nullptr) && (strcmp(_format.value(), "json") == 0); 1096 char* path = _filepath.value(); 1097 bool overwrite = _overwrite.value(); 1098 Symbol* name = (json) ? vmSymbols::dumpThreadsToJson_name() : vmSymbols::dumpThreads_name(); 1099 dumpToFile(name, vmSymbols::string_bool_byte_array_signature(), path, overwrite, CHECK); 1100 } 1101 1102 void ThreadDumpToFileDCmd::dumpToFile(Symbol* name, Symbol* signature, const char* path, bool overwrite, TRAPS) { 1103 ResourceMark rm(THREAD); 1104 HandleMark hm(THREAD); 1105 1106 Handle h_path = java_lang_String::create_from_str(path, CHECK); 1107 1108 Symbol* sym = vmSymbols::jdk_internal_vm_ThreadDumper(); 1109 Klass* k = SystemDictionary::resolve_or_fail(sym, true, CHECK); 1110 InstanceKlass* ik = InstanceKlass::cast(k); 1111 if (HAS_PENDING_EXCEPTION) { 1112 java_lang_Throwable::print(PENDING_EXCEPTION, output()); 1113 output()->cr(); 1114 CLEAR_PENDING_EXCEPTION; 1115 return; 1116 } 1117 1118 // invoke the ThreadDump method to dump to file 1119 JavaValue result(T_OBJECT); 1120 JavaCallArguments args; 1121 args.push_oop(h_path); 1122 args.push_int(overwrite ? JNI_TRUE : JNI_FALSE); 1123 JavaCalls::call_static(&result, 1124 k, 1125 name, 1126 signature, 1127 &args, 1128 THREAD); 1129 if (HAS_PENDING_EXCEPTION) { 1130 java_lang_Throwable::print(PENDING_EXCEPTION, output()); 1131 output()->cr(); 1132 CLEAR_PENDING_EXCEPTION; 1133 return; 1134 } 1135 1136 // check that result is byte array 1137 oop res = cast_to_oop(result.get_jobject()); 1138 assert(res->is_typeArray(), "just checking"); 1139 assert(TypeArrayKlass::cast(res->klass())->element_type() == T_BYTE, "just checking"); 1140 1141 // copy the bytes to the output stream 1142 typeArrayOop ba = typeArrayOop(res); 1143 jbyte* addr = typeArrayOop(res)->byte_at_addr(0); 1144 output()->print_raw((const char*)addr, ba->length()); 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 #ifdef LINUX 1162 1163 SystemMapDCmd::SystemMapDCmd(outputStream* output, bool heap) : 1164 DCmdWithParser(output, heap), 1165 _human_readable("-H", "Human readable format", "BOOLEAN", false, "false") { 1166 _dcmdparser.add_dcmd_option(&_human_readable); 1167 } 1168 1169 void SystemMapDCmd::execute(DCmdSource source, TRAPS) { 1170 MemMapPrinter::print_all_mappings(output(), _human_readable.value()); 1171 } 1172 1173 SystemDumpMapDCmd::SystemDumpMapDCmd(outputStream* output, bool heap) : 1174 DCmdWithParser(output, heap), 1175 _human_readable("-H", "Human readable format", "BOOLEAN", false, "false"), 1176 _filename("-F", "file path (defaults: \"vm_memory_map_<pid>.txt\")", "STRING", false) { 1177 _dcmdparser.add_dcmd_option(&_human_readable); 1178 _dcmdparser.add_dcmd_option(&_filename); 1179 } 1180 1181 void SystemDumpMapDCmd::execute(DCmdSource source, TRAPS) { 1182 stringStream default_name; 1183 default_name.print("vm_memory_map_%d.txt", os::current_process_id()); 1184 const char* name = _filename.is_set() ? _filename.value() : default_name.base(); 1185 fileStream fs(name); 1186 if (fs.is_open()) { 1187 if (!MemTracker::enabled()) { 1188 output()->print_cr("(NMT is disabled, will not annotate mappings)."); 1189 } 1190 MemMapPrinter::print_all_mappings(&fs, _human_readable.value()); 1191 // For the readers convenience, resolve path name. 1192 char tmp[JVM_MAXPATHLEN]; 1193 const char* absname = os::Posix::realpath(name, tmp, sizeof(tmp)); 1194 name = absname != nullptr ? absname : name; 1195 output()->print_cr("Memory map dumped to \"%s\".", name); 1196 } else { 1197 output()->print_cr("Failed to open \"%s\" for writing (%s).", name, os::strerror(errno)); 1198 } 1199 } 1200 1201 #endif // LINUX