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/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<VThreadSchedulerDCmd>(full_export, true, false));
132 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassLoaderStatsDCmd>(full_export, true, false));
133 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassLoaderHierarchyDCmd>(full_export, true, false));
134 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompileQueueDCmd>(full_export, true, false));
135 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CodeListDCmd>(full_export, true, false));
136 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CodeCacheDCmd>(full_export, true, false));
137 #ifdef LINUX
138 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<PerfMapDCmd>(full_export, true, false));
139 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<TrimCLibcHeapDCmd>(full_export, true, false));
140 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<MallocInfoDcmd>(full_export, true, false));
141 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SystemMapDCmd>(full_export, true,false));
142 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SystemDumpMapDCmd>(full_export, true,false));
143 #endif // LINUX
144 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CodeHeapAnalyticsDCmd>(full_export, true, false));
145
146 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesPrintDCmd>(full_export, true, false));
147 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesAddDCmd>(full_export, true, false));
148 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesReplaceDCmd>(full_export, true, false));
149 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesRemoveDCmd>(full_export, true, false));
150 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesClearDCmd>(full_export, true, false));
151 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilationMemoryStatisticDCmd>(full_export, true, false));
152
153 // Enhanced JMX Agent Support
154 // These commands won't be exported via the DiagnosticCommandMBean until an
155 // appropriate permission is created for them
156 uint32_t jmx_agent_export_flags = DCmd_Source_Internal | DCmd_Source_AttachAPI;
157 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStartRemoteDCmd>(jmx_agent_export_flags, true,false));
158 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStartLocalDCmd>(jmx_agent_export_flags, true,false));
159 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStopRemoteDCmd>(jmx_agent_export_flags, true,false));
160 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStatusDCmd>(jmx_agent_export_flags, true,false));
161
162 // Debug on cmd (only makes sense with JVMTI since the agentlib needs it).
163 #if INCLUDE_JVMTI
164 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<DebugOnCmdStartDCmd>(full_export, true, true));
165 #endif // INCLUDE_JVMTI
166
167 #if INCLUDE_CDS
168 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<DumpSharedArchiveDCmd>(full_export, true, false));
169 #endif // INCLUDE_CDS
170
171 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<NMTDCmd>(full_export, true, false));
172 }
173
174 HelpDCmd::HelpDCmd(outputStream* output, bool heap) : DCmdWithParser(output, heap),
175 _all("-all", "Show help for all commands", "BOOLEAN", false, "false"),
176 _cmd("command name", "The name of the command for which we want help",
177 "STRING", false) {
178 _dcmdparser.add_dcmd_option(&_all);
179 _dcmdparser.add_dcmd_argument(&_cmd);
180 };
181
182
183 static int compare_strings(const char** s1, const char** s2) {
184 return ::strcmp(*s1, *s2);
185 }
186
187 void HelpDCmd::execute(DCmdSource source, TRAPS) {
188 if (_all.value()) {
189 GrowableArray<const char*>* cmd_list = DCmdFactory::DCmd_list(source);
190 cmd_list->sort(compare_strings);
191 for (int i = 0; i < cmd_list->length(); i++) {
192 DCmdFactory* factory = DCmdFactory::factory(source, cmd_list->at(i),
193 strlen(cmd_list->at(i)));
194 output()->print_cr("%s%s", factory->name(),
195 factory->is_enabled() ? "" : " [disabled]");
196 output()->print_cr("\t%s", factory->description());
197 output()->cr();
198 factory = factory->next();
199 }
200 } else if (_cmd.has_value()) {
201 DCmd* cmd = nullptr;
202 DCmdFactory* factory = DCmdFactory::factory(source, _cmd.value(),
203 strlen(_cmd.value()));
204 if (factory != nullptr) {
205 output()->print_cr("%s%s", factory->name(),
206 factory->is_enabled() ? "" : " [disabled]");
207 output()->print_cr("%s", factory->description());
208 output()->print_cr("\nImpact: %s", factory->impact());
209 output()->cr();
210 cmd = factory->create_resource_instance(output());
211 if (cmd != nullptr) {
212 DCmdMark mark(cmd);
213 cmd->print_help(factory->name());
214 }
215 } else {
216 output()->print_cr("Help unavailable : '%s' : No such command", _cmd.value());
217 }
218 } else {
219 output()->print_cr("The following commands are available:");
220 GrowableArray<const char *>* cmd_list = DCmdFactory::DCmd_list(source);
221 cmd_list->sort(compare_strings);
222 for (int i = 0; i < cmd_list->length(); i++) {
223 DCmdFactory* factory = DCmdFactory::factory(source, cmd_list->at(i),
224 strlen(cmd_list->at(i)));
225 output()->print_cr("%s%s", factory->name(),
226 factory->is_enabled() ? "" : " [disabled]");
227 factory = factory->_next;
228 }
229 output()->print_cr("\nFor more information about a specific command use 'help <command>'.");
230 }
231 }
232
233 void VersionDCmd::execute(DCmdSource source, TRAPS) {
234 output()->print_cr("%s version %s", VM_Version::vm_name(),
235 VM_Version::vm_release());
236 JDK_Version jdk_version = JDK_Version::current();
237 if (jdk_version.patch_version() > 0) {
238 output()->print_cr("JDK %d.%d.%d.%d", jdk_version.major_version(),
239 jdk_version.minor_version(), jdk_version.security_version(),
240 jdk_version.patch_version());
241 } else {
242 output()->print_cr("JDK %d.%d.%d", jdk_version.major_version(),
243 jdk_version.minor_version(), jdk_version.security_version());
244 }
245 }
246
247 PrintVMFlagsDCmd::PrintVMFlagsDCmd(outputStream* output, bool heap) :
248 DCmdWithParser(output, heap),
249 _all("-all", "Print all flags supported by the VM", "BOOLEAN", false, "false") {
250 _dcmdparser.add_dcmd_option(&_all);
251 }
252
253 void PrintVMFlagsDCmd::execute(DCmdSource source, TRAPS) {
254 if (_all.value()) {
255 JVMFlag::printFlags(output(), true);
256 } else {
257 JVMFlag::printSetFlags(output());
258 }
259 }
260
261 SetVMFlagDCmd::SetVMFlagDCmd(outputStream* output, bool heap) :
262 DCmdWithParser(output, heap),
263 _flag("flag name", "The name of the flag we want to set",
264 "STRING", true),
265 _value("string value", "The value we want to set", "STRING", false) {
266 _dcmdparser.add_dcmd_argument(&_flag);
267 _dcmdparser.add_dcmd_argument(&_value);
268 }
269
270 void SetVMFlagDCmd::execute(DCmdSource source, TRAPS) {
271 const char* val = nullptr;
272 if (_value.value() != nullptr) {
273 val = _value.value();
274 }
275
276 FormatBuffer<80> err_msg("%s", "");
277 int ret = WriteableFlags::set_flag(_flag.value(), val, JVMFlagOrigin::MANAGEMENT, err_msg);
278
279 if (ret != JVMFlag::SUCCESS) {
280 output()->print_cr("%s", err_msg.buffer());
281 }
282 }
283
284 void JVMTIDataDumpDCmd::execute(DCmdSource source, TRAPS) {
285 if (JvmtiExport::should_post_data_dump()) {
286 JvmtiExport::post_data_dump();
287 }
288 }
289
290 #if INCLUDE_SERVICES
291 #if INCLUDE_JVMTI
292 JVMTIAgentLoadDCmd::JVMTIAgentLoadDCmd(outputStream* output, bool heap) :
293 DCmdWithParser(output, heap),
294 _libpath("library path", "Absolute path of the JVMTI agent to load.",
295 "STRING", true),
296 _option("agent option", "Option string to pass the agent.", "STRING", false) {
297 _dcmdparser.add_dcmd_argument(&_libpath);
298 _dcmdparser.add_dcmd_argument(&_option);
299 }
300
301 void JVMTIAgentLoadDCmd::execute(DCmdSource source, TRAPS) {
302
303 if (_libpath.value() == nullptr) {
304 output()->print_cr("JVMTI.agent_load dcmd needs library path.");
305 return;
306 }
307
308 char *suffix = strrchr(_libpath.value(), '.');
309 bool is_java_agent = (suffix != nullptr) && (strncmp(".jar", suffix, 4) == 0);
310
311 if (is_java_agent) {
312 if (_option.value() == nullptr) {
313 JvmtiAgentList::load_agent("instrument", false, _libpath.value(), output());
314 } else {
315 size_t opt_len = strlen(_libpath.value()) + strlen(_option.value()) + 2;
316 if (opt_len > 4096) {
317 output()->print_cr("JVMTI agent attach failed: Options is too long.");
318 return;
319 }
320
321 char *opt = (char *)os::malloc(opt_len, mtInternal);
322 if (opt == nullptr) {
323 output()->print_cr("JVMTI agent attach failed: "
324 "Could not allocate " SIZE_FORMAT " bytes for argument.",
325 opt_len);
326 return;
327 }
328
329 jio_snprintf(opt, opt_len, "%s=%s", _libpath.value(), _option.value());
330 JvmtiAgentList::load_agent("instrument", false, opt, output());
331
332 os::free(opt);
333 }
334 } else {
335 JvmtiAgentList::load_agent(_libpath.value(), true, _option.value(), output());
336 }
337 }
338
339 #endif // INCLUDE_JVMTI
340 #endif // INCLUDE_SERVICES
341
342 void PrintSystemPropertiesDCmd::execute(DCmdSource source, TRAPS) {
343 // load VMSupport
344 Symbol* klass = vmSymbols::jdk_internal_vm_VMSupport();
345 Klass* k = SystemDictionary::resolve_or_fail(klass, true, CHECK);
346 InstanceKlass* ik = InstanceKlass::cast(k);
347 if (ik->should_be_initialized()) {
348 ik->initialize(THREAD);
349 }
350 if (HAS_PENDING_EXCEPTION) {
351 java_lang_Throwable::print(PENDING_EXCEPTION, output());
352 output()->cr();
353 CLEAR_PENDING_EXCEPTION;
354 return;
355 }
356
357 // invoke the serializePropertiesToByteArray method
358 JavaValue result(T_OBJECT);
359 JavaCallArguments args;
360
361 Symbol* signature = vmSymbols::void_byte_array_signature();
362 JavaCalls::call_static(&result,
363 ik,
364 vmSymbols::serializePropertiesToByteArray_name(),
365 signature,
366 &args,
367 THREAD);
368 if (HAS_PENDING_EXCEPTION) {
369 java_lang_Throwable::print(PENDING_EXCEPTION, output());
370 output()->cr();
371 CLEAR_PENDING_EXCEPTION;
372 return;
373 }
374
375 // The result should be a [B
376 oop res = result.get_oop();
377 assert(res->is_typeArray(), "just checking");
378 assert(TypeArrayKlass::cast(res->klass())->element_type() == T_BYTE, "just checking");
379
380 // copy the bytes to the output stream
381 typeArrayOop ba = typeArrayOop(res);
382 jbyte* addr = typeArrayOop(res)->byte_at_addr(0);
383 output()->print_raw((const char*)addr, ba->length());
384 }
385
386 VMUptimeDCmd::VMUptimeDCmd(outputStream* output, bool heap) :
387 DCmdWithParser(output, heap),
388 _date("-date", "Add a prefix with current date", "BOOLEAN", false, "false") {
389 _dcmdparser.add_dcmd_option(&_date);
390 }
391
392 void VMUptimeDCmd::execute(DCmdSource source, TRAPS) {
393 if (_date.value()) {
394 output()->date_stamp(true, "", ": ");
395 }
396 output()->time_stamp().update_to(tty->time_stamp().ticks());
397 output()->stamp();
398 output()->print_cr(" s");
399 }
400
401 void VMInfoDCmd::execute(DCmdSource source, TRAPS) {
402 VMError::print_vm_info(_output);
403 }
404
405 void SystemGCDCmd::execute(DCmdSource source, TRAPS) {
406 Universe::heap()->collect(GCCause::_dcmd_gc_run);
407 }
408
409 void RunFinalizationDCmd::execute(DCmdSource source, TRAPS) {
410 Klass* k = vmClasses::System_klass();
411 JavaValue result(T_VOID);
412 JavaCalls::call_static(&result, k,
413 vmSymbols::run_finalization_name(),
414 vmSymbols::void_method_signature(), CHECK);
415 }
416
417 void HeapInfoDCmd::execute(DCmdSource source, TRAPS) {
418 MutexLocker hl(THREAD, Heap_lock);
419 Universe::heap()->print_on(output());
420 }
421
422 void FinalizerInfoDCmd::execute(DCmdSource source, TRAPS) {
423 ResourceMark rm(THREAD);
424
425 if (!InstanceKlass::is_finalization_enabled()) {
426 output()->print_cr("Finalization is disabled");
427 return;
428 }
429
430 Klass* k = SystemDictionary::resolve_or_fail(
431 vmSymbols::finalizer_histogram_klass(), true, CHECK);
432
433 JavaValue result(T_ARRAY);
434
435 // We are calling lang.ref.FinalizerHistogram.getFinalizerHistogram() method
436 // and expect it to return array of FinalizerHistogramEntry as Object[]
437
438 JavaCalls::call_static(&result, k,
439 vmSymbols::get_finalizer_histogram_name(),
440 vmSymbols::void_finalizer_histogram_entry_array_signature(), CHECK);
441
442 objArrayOop result_oop = (objArrayOop) result.get_oop();
443 if (result_oop->length() == 0) {
444 output()->print_cr("No instances waiting for finalization found");
445 return;
446 }
447
448 oop foop = result_oop->obj_at(0);
449 InstanceKlass* ik = InstanceKlass::cast(foop->klass());
450
451 fieldDescriptor count_fd, name_fd;
452
453 Klass* count_res = ik->find_field(
454 vmSymbols::finalizer_histogram_entry_count_field(), vmSymbols::int_signature(), &count_fd);
455
456 Klass* name_res = ik->find_field(
457 vmSymbols::finalizer_histogram_entry_name_field(), vmSymbols::string_signature(), &name_fd);
458
459 assert(count_res != nullptr && name_res != nullptr, "Unexpected layout of FinalizerHistogramEntry");
460
461 output()->print_cr("Unreachable instances waiting for finalization");
462 output()->print_cr("#instances class name");
463 output()->print_cr("-----------------------");
464
465 for (int i = 0; i < result_oop->length(); ++i) {
466 oop element_oop = result_oop->obj_at(i);
467 oop str_oop = element_oop->obj_field(name_fd.offset());
468 char *name = java_lang_String::as_utf8_string(str_oop);
469 int count = element_oop->int_field(count_fd.offset());
470 output()->print_cr("%10d %s", count, name);
471 }
472 }
473
474 #if INCLUDE_SERVICES // Heap dumping/inspection supported
475 HeapDumpDCmd::HeapDumpDCmd(outputStream* output, bool heap) :
476 DCmdWithParser(output, heap),
477 _filename("filename","Name of the dump file", "STRING",true),
478 _all("-all", "Dump all objects, including unreachable objects",
479 "BOOLEAN", false, "false"),
480 _gzip("-gz", "If specified, the heap dump is written in gzipped format "
481 "using the given compression level. 1 (recommended) is the fastest, "
482 "9 the strongest compression.", "INT", false, "1"),
483 _overwrite("-overwrite", "If specified, the dump file will be overwritten if it exists",
484 "BOOLEAN", false, "false"),
485 _parallel("-parallel", "Number of parallel threads to use for heap dump. The VM "
486 "will try to use the specified number of threads, but might use fewer.",
487 "INT", false, "1") {
488 _dcmdparser.add_dcmd_option(&_all);
489 _dcmdparser.add_dcmd_argument(&_filename);
490 _dcmdparser.add_dcmd_option(&_gzip);
491 _dcmdparser.add_dcmd_option(&_overwrite);
492 _dcmdparser.add_dcmd_option(&_parallel);
493 }
494
495 void HeapDumpDCmd::execute(DCmdSource source, TRAPS) {
496 jlong level = -1; // -1 means no compression.
497 jlong parallel = HeapDumper::default_num_of_dump_threads();
498
499 if (_gzip.is_set()) {
500 level = _gzip.value();
501
502 if (level < 1 || level > 9) {
503 output()->print_cr("Compression level out of range (1-9): " JLONG_FORMAT, level);
504 return;
505 }
506 }
507
508 if (_parallel.is_set()) {
509 parallel = _parallel.value();
510
511 if (parallel < 0) {
512 output()->print_cr("Invalid number of parallel dump threads.");
513 return;
514 } else if (parallel == 0) {
515 // 0 implies to disable parallel heap dump, in such case, we use serial dump instead
516 parallel = 1;
517 }
518 }
519
520 // Request a full GC before heap dump if _all is false
521 // This helps reduces the amount of unreachable objects in the dump
522 // and makes it easier to browse.
523 HeapDumper dumper(!_all.value() /* request GC if _all is false*/);
524 dumper.dump(_filename.value(), output(), (int) level, _overwrite.value(), (uint)parallel);
525 }
526
527 ClassHistogramDCmd::ClassHistogramDCmd(outputStream* output, bool heap) :
528 DCmdWithParser(output, heap),
529 _all("-all", "Inspect all objects, including unreachable objects",
530 "BOOLEAN", false, "false"),
531 _parallel_thread_num("-parallel",
532 "Number of parallel threads to use for heap inspection. "
533 "0 (the default) means let the VM determine the number of threads to use. "
534 "1 means use one thread (disable parallelism). "
535 "For any other value the VM will try to use the specified number of "
536 "threads, but might use fewer.",
537 "INT", false, "0") {
538 _dcmdparser.add_dcmd_option(&_all);
539 _dcmdparser.add_dcmd_option(&_parallel_thread_num);
540 }
541
542 void ClassHistogramDCmd::execute(DCmdSource source, TRAPS) {
543 jlong num = _parallel_thread_num.value();
544 if (num < 0) {
545 output()->print_cr("Parallel thread number out of range (>=0): " JLONG_FORMAT, num);
546 return;
547 }
548 uint parallel_thread_num = num == 0
549 ? MAX2<uint>(1, (uint)os::initial_active_processor_count() * 3 / 8)
550 : num;
551 VM_GC_HeapInspection heapop(output(),
552 !_all.value(), /* request full gc if false */
553 parallel_thread_num);
554 VMThread::execute(&heapop);
555 }
556
557 #endif // INCLUDE_SERVICES
558
559 ThreadDumpDCmd::ThreadDumpDCmd(outputStream* output, bool heap) :
560 DCmdWithParser(output, heap),
561 _locks("-l", "print java.util.concurrent locks", "BOOLEAN", false, "false"),
562 _extended("-e", "print extended thread information", "BOOLEAN", false, "false") {
563 _dcmdparser.add_dcmd_option(&_locks);
564 _dcmdparser.add_dcmd_option(&_extended);
565 }
566
567 void ThreadDumpDCmd::execute(DCmdSource source, TRAPS) {
568 // thread stacks and JNI global handles
569 VM_PrintThreads op1(output(), _locks.value(), _extended.value(), true /* print JNI handle info */);
570 VMThread::execute(&op1);
571
572 // Deadlock detection
573 VM_FindDeadlocks op2(output());
574 VMThread::execute(&op2);
575 }
576
577 // Enhanced JMX Agent support
578
579 JMXStartRemoteDCmd::JMXStartRemoteDCmd(outputStream *output, bool heap_allocated) :
580
581 DCmdWithParser(output, heap_allocated),
582
583 _config_file
584 ("config.file",
585 "set com.sun.management.config.file", "STRING", false),
586
587 _jmxremote_host
588 ("jmxremote.host",
589 "set com.sun.management.jmxremote.host", "STRING", false),
590
591 _jmxremote_port
592 ("jmxremote.port",
593 "set com.sun.management.jmxremote.port", "STRING", false),
594
595 _jmxremote_rmi_port
596 ("jmxremote.rmi.port",
597 "set com.sun.management.jmxremote.rmi.port", "STRING", false),
598
599 _jmxremote_ssl
600 ("jmxremote.ssl",
601 "set com.sun.management.jmxremote.ssl", "STRING", false),
602
603 _jmxremote_registry_ssl
604 ("jmxremote.registry.ssl",
605 "set com.sun.management.jmxremote.registry.ssl", "STRING", false),
606
607 _jmxremote_authenticate
608 ("jmxremote.authenticate",
609 "set com.sun.management.jmxremote.authenticate", "STRING", false),
610
611 _jmxremote_password_file
612 ("jmxremote.password.file",
613 "set com.sun.management.jmxremote.password.file", "STRING", false),
614
615 _jmxremote_access_file
616 ("jmxremote.access.file",
617 "set com.sun.management.jmxremote.access.file", "STRING", false),
618
619 _jmxremote_login_config
620 ("jmxremote.login.config",
621 "set com.sun.management.jmxremote.login.config", "STRING", false),
622
623 _jmxremote_ssl_enabled_cipher_suites
624 ("jmxremote.ssl.enabled.cipher.suites",
625 "set com.sun.management.jmxremote.ssl.enabled.cipher.suite", "STRING", false),
626
627 _jmxremote_ssl_enabled_protocols
628 ("jmxremote.ssl.enabled.protocols",
629 "set com.sun.management.jmxremote.ssl.enabled.protocols", "STRING", false),
630
631 _jmxremote_ssl_need_client_auth
632 ("jmxremote.ssl.need.client.auth",
633 "set com.sun.management.jmxremote.need.client.auth", "STRING", false),
634
635 _jmxremote_ssl_config_file
636 ("jmxremote.ssl.config.file",
637 "set com.sun.management.jmxremote.ssl.config.file", "STRING", false),
638
639 // JDP Protocol support
640 _jmxremote_autodiscovery
641 ("jmxremote.autodiscovery",
642 "set com.sun.management.jmxremote.autodiscovery", "STRING", false),
643
644 _jdp_port
645 ("jdp.port",
646 "set com.sun.management.jdp.port", "INT", false),
647
648 _jdp_address
649 ("jdp.address",
650 "set com.sun.management.jdp.address", "STRING", false),
651
652 _jdp_source_addr
653 ("jdp.source_addr",
654 "set com.sun.management.jdp.source_addr", "STRING", false),
655
656 _jdp_ttl
657 ("jdp.ttl",
658 "set com.sun.management.jdp.ttl", "INT", false),
659
660 _jdp_pause
661 ("jdp.pause",
662 "set com.sun.management.jdp.pause", "INT", false),
663
664 _jdp_name
665 ("jdp.name",
666 "set com.sun.management.jdp.name", "STRING", false)
667
668 {
669 _dcmdparser.add_dcmd_option(&_config_file);
670 _dcmdparser.add_dcmd_option(&_jmxremote_host);
671 _dcmdparser.add_dcmd_option(&_jmxremote_port);
672 _dcmdparser.add_dcmd_option(&_jmxremote_rmi_port);
673 _dcmdparser.add_dcmd_option(&_jmxremote_ssl);
674 _dcmdparser.add_dcmd_option(&_jmxremote_registry_ssl);
675 _dcmdparser.add_dcmd_option(&_jmxremote_authenticate);
676 _dcmdparser.add_dcmd_option(&_jmxremote_password_file);
677 _dcmdparser.add_dcmd_option(&_jmxremote_access_file);
678 _dcmdparser.add_dcmd_option(&_jmxremote_login_config);
679 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_enabled_cipher_suites);
680 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_enabled_protocols);
681 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_need_client_auth);
682 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_config_file);
683 _dcmdparser.add_dcmd_option(&_jmxremote_autodiscovery);
684 _dcmdparser.add_dcmd_option(&_jdp_port);
685 _dcmdparser.add_dcmd_option(&_jdp_address);
686 _dcmdparser.add_dcmd_option(&_jdp_source_addr);
687 _dcmdparser.add_dcmd_option(&_jdp_ttl);
688 _dcmdparser.add_dcmd_option(&_jdp_pause);
689 _dcmdparser.add_dcmd_option(&_jdp_name);
690 }
691
692 void JMXStartRemoteDCmd::execute(DCmdSource source, TRAPS) {
693 ResourceMark rm(THREAD);
694 HandleMark hm(THREAD);
695
696 // Load and initialize the jdk.internal.agent.Agent class
697 // invoke startRemoteManagementAgent(string) method to start
698 // the remote management server.
699 // throw java.lang.NoSuchMethodError if the method doesn't exist
700
701 loadAgentModule(CHECK);
702 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
703 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::jdk_internal_agent_Agent(), loader, Handle(), true, CHECK);
704
705 JavaValue result(T_VOID);
706
707 // Pass all command line arguments to java as key=value,...
708 // All checks are done on java side
709
710 int len = 0;
711 stringStream options;
712 char comma[2] = {0,0};
713
714 // Leave default values on Agent.class side and pass only
715 // arguments explicitly set by user. All arguments passed
716 // to jcmd override properties with the same name set by
717 // command line with -D or by managmenent.properties
718 // file.
719 #define PUT_OPTION(a) \
720 do { \
721 if ( (a).is_set() ){ \
722 if ( *((a).type()) == 'I' ) { \
723 options.print("%scom.sun.management.%s=" JLONG_FORMAT, comma, (a).name(), (jlong)((a).value())); \
724 } else { \
725 options.print("%scom.sun.management.%s=%s", comma, (a).name(), (char*)((a).value())); \
726 } \
727 comma[0] = ','; \
728 }\
729 } while(0);
730
731
732 PUT_OPTION(_config_file);
733 PUT_OPTION(_jmxremote_host);
734 PUT_OPTION(_jmxremote_port);
735 PUT_OPTION(_jmxremote_rmi_port);
736 PUT_OPTION(_jmxremote_ssl);
737 PUT_OPTION(_jmxremote_registry_ssl);
738 PUT_OPTION(_jmxremote_authenticate);
739 PUT_OPTION(_jmxremote_password_file);
740 PUT_OPTION(_jmxremote_access_file);
741 PUT_OPTION(_jmxremote_login_config);
742 PUT_OPTION(_jmxremote_ssl_enabled_cipher_suites);
743 PUT_OPTION(_jmxremote_ssl_enabled_protocols);
744 PUT_OPTION(_jmxremote_ssl_need_client_auth);
745 PUT_OPTION(_jmxremote_ssl_config_file);
746 PUT_OPTION(_jmxremote_autodiscovery);
747 PUT_OPTION(_jdp_port);
748 PUT_OPTION(_jdp_address);
749 PUT_OPTION(_jdp_source_addr);
750 PUT_OPTION(_jdp_ttl);
751 PUT_OPTION(_jdp_pause);
752 PUT_OPTION(_jdp_name);
753
754 #undef PUT_OPTION
755
756 Handle str = java_lang_String::create_from_str(options.as_string(), CHECK);
757 JavaCalls::call_static(&result, k, vmSymbols::startRemoteAgent_name(), vmSymbols::string_void_signature(), str, CHECK);
758 }
759
760 JMXStartLocalDCmd::JMXStartLocalDCmd(outputStream *output, bool heap_allocated) :
761 DCmd(output, heap_allocated) {
762 // do nothing
763 }
764
765 void JMXStartLocalDCmd::execute(DCmdSource source, TRAPS) {
766 ResourceMark rm(THREAD);
767 HandleMark hm(THREAD);
768
769 // Load and initialize the jdk.internal.agent.Agent class
770 // invoke startLocalManagementAgent(void) method to start
771 // the local management server
772 // throw java.lang.NoSuchMethodError if method doesn't exist
773
774 loadAgentModule(CHECK);
775 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
776 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::jdk_internal_agent_Agent(), loader, Handle(), true, CHECK);
777
778 JavaValue result(T_VOID);
779 JavaCalls::call_static(&result, k, vmSymbols::startLocalAgent_name(), vmSymbols::void_method_signature(), CHECK);
780 }
781
782 void JMXStopRemoteDCmd::execute(DCmdSource source, TRAPS) {
783 ResourceMark rm(THREAD);
784 HandleMark hm(THREAD);
785
786 // Load and initialize the jdk.internal.agent.Agent class
787 // invoke stopRemoteManagementAgent method to stop the
788 // management server
789 // throw java.lang.NoSuchMethodError if method doesn't exist
790
791 loadAgentModule(CHECK);
792 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
793 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::jdk_internal_agent_Agent(), loader, Handle(), true, CHECK);
794
795 JavaValue result(T_VOID);
796 JavaCalls::call_static(&result, k, vmSymbols::stopRemoteAgent_name(), vmSymbols::void_method_signature(), CHECK);
797 }
798
799 JMXStatusDCmd::JMXStatusDCmd(outputStream *output, bool heap_allocated) :
800 DCmd(output, heap_allocated) {
801 // do nothing
802 }
803
804 void JMXStatusDCmd::execute(DCmdSource source, TRAPS) {
805 ResourceMark rm(THREAD);
806 HandleMark hm(THREAD);
807
808 // Load and initialize the jdk.internal.agent.Agent class
809 // invoke getManagementAgentStatus() method to generate the status info
810 // throw java.lang.NoSuchMethodError if method doesn't exist
811
812 loadAgentModule(CHECK);
813 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
814 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::jdk_internal_agent_Agent(), loader, Handle(), true, CHECK);
815
816 JavaValue result(T_OBJECT);
817 JavaCalls::call_static(&result, k, vmSymbols::getAgentStatus_name(), vmSymbols::void_string_signature(), CHECK);
818
819 jvalue* jv = (jvalue*) result.get_value_addr();
820 oop str = cast_to_oop(jv->l);
821 if (str != nullptr) {
822 char* out = java_lang_String::as_utf8_string(str);
823 if (out) {
824 // Avoid using print_cr() because length maybe longer than O_BUFLEN
825 output()->print_raw_cr(out);
826 return;
827 }
828 }
829 output()->print_cr("Error obtaining management agent status");
830 }
831
832 VMDynamicLibrariesDCmd::VMDynamicLibrariesDCmd(outputStream *output, bool heap_allocated) :
833 DCmd(output, heap_allocated) {
834 // do nothing
835 }
836
837 void VMDynamicLibrariesDCmd::execute(DCmdSource source, TRAPS) {
838 os::print_dll_info(output());
839 output()->cr();
840 }
841
842 void CompileQueueDCmd::execute(DCmdSource source, TRAPS) {
843 VM_PrintCompileQueue printCompileQueueOp(output());
844 VMThread::execute(&printCompileQueueOp);
845 }
846
847 void CodeListDCmd::execute(DCmdSource source, TRAPS) {
848 CodeCache::print_codelist(output());
849 }
850
851 void CodeCacheDCmd::execute(DCmdSource source, TRAPS) {
852 CodeCache::print_layout(output());
853 }
854
855 #ifdef LINUX
856 #define DEFAULT_PERFMAP_FILENAME "/tmp/perf-<pid>.map"
857
858 PerfMapDCmd::PerfMapDCmd(outputStream* output, bool heap) :
859 DCmdWithParser(output, heap),
860 _filename("filename", "Name of the map file", "STRING", false, DEFAULT_PERFMAP_FILENAME)
861 {
862 _dcmdparser.add_dcmd_argument(&_filename);
863 }
864
865 void PerfMapDCmd::execute(DCmdSource source, TRAPS) {
866 // The check for _filename.is_set() is because we don't want to use
867 // DEFAULT_PERFMAP_FILENAME, since it is meant as a description
868 // of the default, not the actual default.
869 CodeCache::write_perf_map(_filename.is_set() ? _filename.value() : nullptr);
870 }
871 #endif // LINUX
872
873 //---< BEGIN >--- CodeHeap State Analytics.
874 CodeHeapAnalyticsDCmd::CodeHeapAnalyticsDCmd(outputStream* output, bool heap) :
875 DCmdWithParser(output, heap),
876 _function("function", "Function to be performed (aggregate, UsedSpace, FreeSpace, MethodCount, MethodSpace, MethodAge, MethodNames, discard", "STRING", false, "all"),
877 _granularity("granularity", "Detail level - smaller value -> more detail", "INT", false, "4096") {
878 _dcmdparser.add_dcmd_argument(&_function);
879 _dcmdparser.add_dcmd_argument(&_granularity);
880 }
881
882 void CodeHeapAnalyticsDCmd::execute(DCmdSource source, TRAPS) {
883 jlong granularity = _granularity.value();
884 if (granularity < 1) {
885 Exceptions::fthrow(THREAD_AND_LOCATION, vmSymbols::java_lang_IllegalArgumentException(),
886 "Invalid granularity value " JLONG_FORMAT ". Should be positive.\n", granularity);
887 return;
888 }
889
890 CompileBroker::print_heapinfo(output(), _function.value(), granularity);
891 }
892 //---< END >--- CodeHeap State Analytics.
893
894 EventLogDCmd::EventLogDCmd(outputStream* output, bool heap) :
895 DCmdWithParser(output, heap),
896 _log("log", "Name of log to be printed. If omitted, all logs are printed.", "STRING", false, nullptr),
897 _max("max", "Maximum number of events to be printed (newest first). If omitted, all events are printed.", "STRING", false, nullptr)
898 {
899 _dcmdparser.add_dcmd_option(&_log);
900 _dcmdparser.add_dcmd_option(&_max);
901 }
902
903 void EventLogDCmd::execute(DCmdSource source, TRAPS) {
904 const char* max_value = _max.value();
905 int max = -1;
906 if (max_value != nullptr) {
907 char* endptr = nullptr;
908 int max;
909 if (!parse_integer(max_value, &max)) {
910 output()->print_cr("Invalid max option: \"%s\".", max_value);
911 return;
912 }
913 }
914 const char* log_name = _log.value();
915 if (log_name != nullptr) {
916 Events::print_one(output(), log_name, max);
917 } else {
918 Events::print_all(output(), max);
919 }
920 }
921
922 void CompilerDirectivesPrintDCmd::execute(DCmdSource source, TRAPS) {
923 DirectivesStack::print(output());
924 }
925
926 CompilerDirectivesAddDCmd::CompilerDirectivesAddDCmd(outputStream* output, bool heap) :
927 DCmdWithParser(output, heap),
928 _filename("filename", "Name of the directives file", "STRING", true),
929 _refresh("-r", "Refresh affected methods", "BOOLEAN", false, "false") {
930
931 _dcmdparser.add_dcmd_argument(&_filename);
932 _dcmdparser.add_dcmd_option(&_refresh);
933 }
934
935 void CompilerDirectivesAddDCmd::execute(DCmdSource source, TRAPS) {
936 DirectivesParser::parse_from_file(_filename.value(), output(), true);
937 if (_refresh.value()) {
938 CodeCache::mark_directives_matches(true);
939 CodeCache::recompile_marked_directives_matches();
940 }
941 }
942
943 CompilerDirectivesReplaceDCmd::CompilerDirectivesReplaceDCmd(outputStream* output, bool heap) :
944 DCmdWithParser(output, heap),
945 _filename("filename", "Name of the directives file", "STRING", true),
946 _refresh("-r", "Refresh affected methods", "BOOLEAN", false, "false") {
947
948 _dcmdparser.add_dcmd_argument(&_filename);
949 _dcmdparser.add_dcmd_option(&_refresh);
950 }
951
952 void CompilerDirectivesReplaceDCmd::execute(DCmdSource source, TRAPS) {
953 // Need to mark the methods twice, to account for the method that doesn't match
954 // the directives anymore
955 if (_refresh.value()) {
956 CodeCache::mark_directives_matches();
957
958 DirectivesStack::clear();
959 DirectivesParser::parse_from_file(_filename.value(), output(), true);
960
961 CodeCache::mark_directives_matches();
962 CodeCache::recompile_marked_directives_matches();
963 } else {
964 DirectivesStack::clear();
965 DirectivesParser::parse_from_file(_filename.value(), output(), true);
966 }
967 }
968
969 CompilerDirectivesRemoveDCmd::CompilerDirectivesRemoveDCmd(outputStream* output, bool heap) :
970 DCmdWithParser(output, heap),
971 _refresh("-r", "Refresh affected methods", "BOOLEAN", false, "false") {
972
973 _dcmdparser.add_dcmd_option(&_refresh);
974 }
975
976 void CompilerDirectivesRemoveDCmd::execute(DCmdSource source, TRAPS) {
977 if (_refresh.value()) {
978 CodeCache::mark_directives_matches(true);
979 DirectivesStack::pop(1);
980 CodeCache::recompile_marked_directives_matches();
981 } else {
982 DirectivesStack::pop(1);
983 }
984 }
985
986 CompilerDirectivesClearDCmd::CompilerDirectivesClearDCmd(outputStream* output, bool heap) :
987 DCmdWithParser(output, heap),
988 _refresh("-r", "Refresh affected methods", "BOOLEAN", false, "false") {
989
990 _dcmdparser.add_dcmd_option(&_refresh);
991 }
992
993 void CompilerDirectivesClearDCmd::execute(DCmdSource source, TRAPS) {
994 if (_refresh.value()) {
995 CodeCache::mark_directives_matches();
996 DirectivesStack::clear();
997 CodeCache::recompile_marked_directives_matches();
998 } else {
999 DirectivesStack::clear();
1000 }
1001 }
1002
1003 #if INCLUDE_SERVICES
1004 ClassHierarchyDCmd::ClassHierarchyDCmd(outputStream* output, bool heap) :
1005 DCmdWithParser(output, heap),
1006 _print_interfaces("-i", "Inherited interfaces should be printed.", "BOOLEAN", false, "false"),
1007 _print_subclasses("-s", "If a classname is specified, print its subclasses "
1008 "in addition to its superclasses. Without this option only the "
1009 "superclasses will be printed.", "BOOLEAN", false, "false"),
1010 _classname("classname", "Name of class whose hierarchy should be printed. "
1011 "If not specified, all class hierarchies are printed.",
1012 "STRING", false) {
1013 _dcmdparser.add_dcmd_option(&_print_interfaces);
1014 _dcmdparser.add_dcmd_option(&_print_subclasses);
1015 _dcmdparser.add_dcmd_argument(&_classname);
1016 }
1017
1018 void ClassHierarchyDCmd::execute(DCmdSource source, TRAPS) {
1019 VM_PrintClassHierarchy printClassHierarchyOp(output(), _print_interfaces.value(),
1020 _print_subclasses.value(), _classname.value());
1021 VMThread::execute(&printClassHierarchyOp);
1022 }
1023 #endif
1024
1025 ClassesDCmd::ClassesDCmd(outputStream* output, bool heap) :
1026 DCmdWithParser(output, heap),
1027 _verbose("-verbose",
1028 "Dump the detailed content of a Java class. "
1029 "Some classes are annotated with flags: "
1030 "F = has, or inherits, a non-empty finalize method, "
1031 "f = has final method, "
1032 "W = methods rewritten, "
1033 "C = marked with @Contended annotation, "
1034 "R = has been redefined, "
1035 "S = is shared class",
1036 "BOOLEAN", false, "false") {
1037 _dcmdparser.add_dcmd_option(&_verbose);
1038 }
1039
1040 class VM_PrintClasses : public VM_Operation {
1041 private:
1042 outputStream* _out;
1043 bool _verbose;
1044 public:
1045 VM_PrintClasses(outputStream* out, bool verbose) : _out(out), _verbose(verbose) {}
1046
1047 virtual VMOp_Type type() const { return VMOp_PrintClasses; }
1048
1049 virtual void doit() {
1050 PrintClassClosure closure(_out, _verbose);
1051 ClassLoaderDataGraph::classes_do(&closure);
1052 }
1053 };
1054
1055 void ClassesDCmd::execute(DCmdSource source, TRAPS) {
1056 VM_PrintClasses vmop(output(), _verbose.is_set());
1057 VMThread::execute(&vmop);
1058 }
1059
1060 #if INCLUDE_CDS
1061 #define DEFAULT_CDS_ARCHIVE_FILENAME "java_pid<pid>_<subcmd>.jsa"
1062
1063 DumpSharedArchiveDCmd::DumpSharedArchiveDCmd(outputStream* output, bool heap) :
1064 DCmdWithParser(output, heap),
1065 _suboption("subcmd", "static_dump | dynamic_dump", "STRING", true),
1066 _filename("filename", "Name of shared archive to be dumped", "STRING", false,
1067 DEFAULT_CDS_ARCHIVE_FILENAME)
1068 {
1069 _dcmdparser.add_dcmd_argument(&_suboption);
1070 _dcmdparser.add_dcmd_argument(&_filename);
1071 }
1072
1073 void DumpSharedArchiveDCmd::execute(DCmdSource source, TRAPS) {
1074 jboolean is_static;
1075 const char* scmd = _suboption.value();
1076
1077 // The check for _filename.is_set() is because we don't want to use
1078 // DEFAULT_CDS_ARCHIVE_FILENAME, since it is meant as a description
1079 // of the default, not the actual default.
1080 const char* file = _filename.is_set() ? _filename.value() : nullptr;
1081
1082 if (strcmp(scmd, "static_dump") == 0) {
1083 is_static = JNI_TRUE;
1084 output()->print("Static dump: ");
1085 } else if (strcmp(scmd, "dynamic_dump") == 0) {
1086 is_static = JNI_FALSE;
1087 output()->print("Dynamic dump: ");
1088 if (!UseSharedSpaces) {
1089 output()->print_cr("Dynamic dump is unsupported when base CDS archive is not loaded");
1090 return;
1091 }
1092 if (!RecordDynamicDumpInfo) {
1093 output()->print_cr("Dump dynamic should run with -XX:+RecordDynamicDumpInfo");
1094 return;
1095 }
1096 } else {
1097 output()->print_cr("Invalid command for VM.cds, valid input is static_dump or dynamic_dump");
1098 return;
1099 }
1100
1101 // call CDS.dumpSharedArchive
1102 Handle fileh;
1103 if (file != nullptr) {
1104 fileh = java_lang_String::create_from_str(_filename.value(), CHECK);
1105 }
1106 Symbol* cds_name = vmSymbols::jdk_internal_misc_CDS();
1107 Klass* cds_klass = SystemDictionary::resolve_or_fail(cds_name, true /*throw error*/, CHECK);
1108 JavaValue result(T_OBJECT);
1109 JavaCallArguments args;
1110 args.push_int(is_static);
1111 args.push_oop(fileh);
1112 JavaCalls::call_static(&result,
1113 cds_klass,
1114 vmSymbols::dumpSharedArchive(),
1115 vmSymbols::dumpSharedArchive_signature(),
1116 &args, CHECK);
1117 if (!HAS_PENDING_EXCEPTION) {
1118 assert(result.get_type() == T_OBJECT, "Sanity check");
1119 // result contains the archive name
1120 char* archive_name = java_lang_String::as_utf8_string(result.get_oop());
1121 output()->print_cr("%s", archive_name);
1122 }
1123 }
1124 #endif // INCLUDE_CDS
1125
1126 #if INCLUDE_JVMTI
1127 extern "C" typedef char const* (JNICALL *debugInit_startDebuggingViaCommandPtr)(JNIEnv* env, jthread thread, char const** transport_name,
1128 char const** address, jboolean* first_start);
1129 static debugInit_startDebuggingViaCommandPtr dvc_start_ptr = nullptr;
1130
1131 void DebugOnCmdStartDCmd::execute(DCmdSource source, TRAPS) {
1132 char const* transport = nullptr;
1133 char const* addr = nullptr;
1134 jboolean is_first_start = JNI_FALSE;
1135 JavaThread* thread = THREAD;
1136 jthread jt = JNIHandles::make_local(thread->threadObj());
1137 ThreadToNativeFromVM ttn(thread);
1138 const char *error = "Could not find jdwp agent.";
1139
1140 if (!dvc_start_ptr) {
1141 JvmtiAgentList::Iterator it = JvmtiAgentList::agents();
1142 while (it.has_next()) {
1143 JvmtiAgent* agent = it.next();
1144 if ((strcmp("jdwp", agent->name()) == 0) && (dvc_start_ptr == nullptr)) {
1145 char const* func = "debugInit_startDebuggingViaCommand";
1146 dvc_start_ptr = (debugInit_startDebuggingViaCommandPtr) os::find_agent_function(agent, false, &func, 1);
1147 }
1148 }
1149 }
1150
1151 if (dvc_start_ptr) {
1152 error = dvc_start_ptr(thread->jni_environment(), jt, &transport, &addr, &is_first_start);
1153 }
1154
1155 if (error != nullptr) {
1156 output()->print_cr("Debugging has not been started: %s", error);
1157 } else {
1158 output()->print_cr(is_first_start ? "Debugging has been started." : "Debugging is already active.");
1159 output()->print_cr("Transport : %s", transport ? transport : "#unknown");
1160 output()->print_cr("Address : %s", addr ? addr : "#unknown");
1161 }
1162 }
1163 #endif // INCLUDE_JVMTI
1164
1165 ThreadDumpToFileDCmd::ThreadDumpToFileDCmd(outputStream* output, bool heap) :
1166 DCmdWithParser(output, heap),
1167 _overwrite("-overwrite", "May overwrite existing file", "BOOLEAN", false, "false"),
1168 _format("-format", "Output format (\"plain\" or \"json\")", "STRING", false, "plain"),
1169 _filepath("filepath", "The file path to the output file", "STRING", true) {
1170 _dcmdparser.add_dcmd_option(&_overwrite);
1171 _dcmdparser.add_dcmd_option(&_format);
1172 _dcmdparser.add_dcmd_argument(&_filepath);
1173 }
1174
1175 void ThreadDumpToFileDCmd::execute(DCmdSource source, TRAPS) {
1176 bool json = (_format.value() != nullptr) && (strcmp(_format.value(), "json") == 0);
1177 char* path = _filepath.value();
1178 bool overwrite = _overwrite.value();
1179 Symbol* name = (json) ? vmSymbols::dumpThreadsToJson_name() : vmSymbols::dumpThreads_name();
1180 dumpToFile(name, vmSymbols::string_bool_byte_array_signature(), path, overwrite, CHECK);
1181 }
1182
1183 void ThreadDumpToFileDCmd::dumpToFile(Symbol* name, Symbol* signature, const char* path, bool overwrite, TRAPS) {
1184 ResourceMark rm(THREAD);
1185 HandleMark hm(THREAD);
1186
1187 Handle h_path = java_lang_String::create_from_str(path, CHECK);
1188
1189 Symbol* sym = vmSymbols::jdk_internal_vm_ThreadDumper();
1190 Klass* k = SystemDictionary::resolve_or_fail(sym, true, CHECK);
1191 if (HAS_PENDING_EXCEPTION) {
1192 java_lang_Throwable::print(PENDING_EXCEPTION, output());
1193 output()->cr();
1194 CLEAR_PENDING_EXCEPTION;
1195 return;
1196 }
1197
1198 // invoke the ThreadDump method to dump to file
1199 JavaValue result(T_OBJECT);
1200 JavaCallArguments args;
1201 args.push_oop(h_path);
1202 args.push_int(overwrite ? JNI_TRUE : JNI_FALSE);
1203 JavaCalls::call_static(&result,
1204 k,
1205 name,
1206 signature,
1207 &args,
1208 THREAD);
1209 if (HAS_PENDING_EXCEPTION) {
1210 java_lang_Throwable::print(PENDING_EXCEPTION, output());
1211 output()->cr();
1212 CLEAR_PENDING_EXCEPTION;
1213 return;
1214 }
1215
1216 // check that result is byte array
1217 oop res = cast_to_oop(result.get_jobject());
1218 assert(res->is_typeArray(), "just checking");
1219 assert(TypeArrayKlass::cast(res->klass())->element_type() == T_BYTE, "just checking");
1220
1221 // copy the bytes to the output stream
1222 typeArrayOop ba = typeArrayOop(res);
1223 jbyte* addr = typeArrayOop(res)->byte_at_addr(0);
1224 output()->print_raw((const char*)addr, ba->length());
1225 }
1226
1227 void VThreadSchedulerDCmd::execute(DCmdSource source, TRAPS) {
1228 ResourceMark rm(THREAD);
1229 HandleMark hm(THREAD);
1230
1231 Symbol* sym = vmSymbols::java_lang_VirtualThread();
1232 Klass* k = SystemDictionary::resolve_or_fail(sym, true, CHECK);
1233 if (HAS_PENDING_EXCEPTION) {
1234 java_lang_Throwable::print(PENDING_EXCEPTION, output());
1235 output()->cr();
1236 CLEAR_PENDING_EXCEPTION;
1237 return;
1238 }
1239
1240 // invoke printDefaultScheduler method
1241 JavaValue result(T_OBJECT);
1242 JavaCallArguments args;
1243 JavaCalls::call_static(&result,
1244 k,
1245 vmSymbols::printDefaultScheduler_name(),
1246 vmSymbols::void_byte_array_signature(),
1247 &args,
1248 THREAD);
1249 if (HAS_PENDING_EXCEPTION) {
1250 java_lang_Throwable::print(PENDING_EXCEPTION, output());
1251 output()->cr();
1252 CLEAR_PENDING_EXCEPTION;
1253 return;
1254 }
1255
1256 // check that result is byte array
1257 oop res = cast_to_oop(result.get_jobject());
1258 assert(res->is_typeArray(), "just checking");
1259 assert(TypeArrayKlass::cast(res->klass())->element_type() == T_BYTE, "just checking");
1260
1261 // copy the bytes to the output stream
1262 typeArrayOop ba = typeArrayOop(res);
1263 jbyte* addr = typeArrayOop(res)->byte_at_addr(0);
1264 output()->print_raw((const char*)addr, ba->length());
1265 }
1266
1267 CompilationMemoryStatisticDCmd::CompilationMemoryStatisticDCmd(outputStream* output, bool heap) :
1268 DCmdWithParser(output, heap),
1269 _human_readable("-H", "Human readable format", "BOOLEAN", false, "false"),
1270 _minsize("-s", "Minimum memory size", "MEMORY SIZE", false, "0") {
1271 _dcmdparser.add_dcmd_option(&_human_readable);
1272 _dcmdparser.add_dcmd_option(&_minsize);
1273 }
1274
1275 void CompilationMemoryStatisticDCmd::execute(DCmdSource source, TRAPS) {
1276 const bool human_readable = _human_readable.value();
1277 const size_t minsize = _minsize.has_value() ? _minsize.value()._size : 0;
1278 CompilationMemoryStatistic::print_all_by_size(output(), human_readable, minsize);
1279 }
1280
1281 #ifdef LINUX
1282
1283 SystemMapDCmd::SystemMapDCmd(outputStream* output, bool heap) :
1284 DCmdWithParser(output, heap),
1285 _human_readable("-H", "Human readable format", "BOOLEAN", false, "false") {
1286 _dcmdparser.add_dcmd_option(&_human_readable);
1287 }
1288
1289 void SystemMapDCmd::execute(DCmdSource source, TRAPS) {
1290 MemMapPrinter::print_all_mappings(output(), _human_readable.value());
1291 }
1292
1293 SystemDumpMapDCmd::SystemDumpMapDCmd(outputStream* output, bool heap) :
1294 DCmdWithParser(output, heap),
1295 _human_readable("-H", "Human readable format", "BOOLEAN", false, "false"),
1296 _filename("-F", "file path (defaults: \"vm_memory_map_<pid>.txt\")", "STRING", false) {
1297 _dcmdparser.add_dcmd_option(&_human_readable);
1298 _dcmdparser.add_dcmd_option(&_filename);
1299 }
1300
1301 void SystemDumpMapDCmd::execute(DCmdSource source, TRAPS) {
1302 stringStream default_name;
1303 default_name.print("vm_memory_map_%d.txt", os::current_process_id());
1304 const char* name = _filename.is_set() ? _filename.value() : default_name.base();
1305 fileStream fs(name);
1306 if (fs.is_open()) {
1307 if (!MemTracker::enabled()) {
1308 output()->print_cr("(NMT is disabled, will not annotate mappings).");
1309 }
1310 MemMapPrinter::print_all_mappings(&fs, _human_readable.value());
1311 // For the readers convenience, resolve path name.
1312 char tmp[JVM_MAXPATHLEN];
1313 const char* absname = os::Posix::realpath(name, tmp, sizeof(tmp));
1314 name = absname != nullptr ? absname : name;
1315 output()->print_cr("Memory map dumped to \"%s\".", name);
1316 } else {
1317 output()->print_cr("Failed to open \"%s\" for writing (%s).", name, os::strerror(errno));
1318 }
1319 }
1320
1321 #endif // LINUX