1 /*
2 * Copyright (c) 2011, 2025, 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 #ifndef SHARE_SERVICES_DIAGNOSTICCOMMAND_HPP
26 #define SHARE_SERVICES_DIAGNOSTICCOMMAND_HPP
27
28 #include "classfile/stringTable.hpp"
29 #include "classfile/symbolTable.hpp"
30 #include "classfile/systemDictionary.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "runtime/arguments.hpp"
33 #include "runtime/os.hpp"
34 #include "runtime/vmThread.hpp"
35 #include "services/diagnosticArgument.hpp"
36 #include "services/diagnosticCommand.hpp"
37 #include "services/diagnosticFramework.hpp"
38 #include "utilities/macros.hpp"
39 #include "utilities/ostream.hpp"
40 #include "oops/method.hpp"
41
42 class HelpDCmd : public DCmdWithParser {
43 protected:
44 DCmdArgument<bool> _all;
45 DCmdArgument<char*> _cmd;
46 public:
47 static int num_arguments() { return 2; }
48 HelpDCmd(outputStream* output, bool heap);
49 static const char* name() { return "help"; }
50 static const char* description() {
51 return "For more information about a specific command use 'help <command>'. "
52 "With no argument this will show a list of available commands. "
53 "'help all' will show help for all commands.";
54 }
55 static const char* impact() { return "Low"; }
56 virtual void execute(DCmdSource source, TRAPS);
57 };
58
59 class VersionDCmd : public DCmd {
60 public:
61 VersionDCmd(outputStream* output, bool heap) : DCmd(output,heap) { }
62 static const char* name() { return "VM.version"; }
63 static const char* description() {
64 return "Print JVM version information.";
65 }
66 static const char* impact() { return "Low"; }
67 virtual void execute(DCmdSource source, TRAPS);
68 };
69
70 class CommandLineDCmd : public DCmd {
71 public:
72 CommandLineDCmd(outputStream* output, bool heap) : DCmd(output, heap) { }
73 static const char* name() { return "VM.command_line"; }
74 static const char* description() {
75 return "Print the command line used to start this VM instance.";
76 }
77 static const char* impact() { return "Low"; }
78 virtual void execute(DCmdSource source, TRAPS) {
79 Arguments::print_on(_output);
80 }
81 };
82
83 // See also: get_system_properties in attachListener.cpp
84 class PrintSystemPropertiesDCmd : public DCmd {
85 public:
86 PrintSystemPropertiesDCmd(outputStream* output, bool heap) : DCmd(output, heap) { }
87 static const char* name() { return "VM.system_properties"; }
88 static const char* description() {
89 return "Print system properties.";
90 }
91 static const char* impact() {
92 return "Low";
93 }
94 virtual void execute(DCmdSource source, TRAPS);
95 };
96
97 // See also: print_flag in attachListener.cpp
98 class PrintVMFlagsDCmd : public DCmdWithParser {
99 protected:
100 DCmdArgument<bool> _all;
101 public:
102 static int num_arguments() { return 1; }
103 PrintVMFlagsDCmd(outputStream* output, bool heap);
104 static const char* name() { return "VM.flags"; }
105 static const char* description() {
106 return "Print VM flag options and their current values.";
107 }
108 static const char* impact() {
109 return "Low";
110 }
111 virtual void execute(DCmdSource source, TRAPS);
112 };
113
114 class SetVMFlagDCmd : public DCmdWithParser {
115 protected:
116 DCmdArgument<char*> _flag;
117 DCmdArgument<char*> _value;
118
119 public:
120 static int num_arguments() { return 2; }
121 SetVMFlagDCmd(outputStream* output, bool heap);
122 static const char* name() { return "VM.set_flag"; }
123 static const char* description() {
124 return "Sets VM flag option using the provided value.";
125 }
126 static const char* impact() {
127 return "Low";
128 }
129 virtual void execute(DCmdSource source, TRAPS);
130 };
131
132 class JVMTIDataDumpDCmd : public DCmd {
133 public:
134 JVMTIDataDumpDCmd(outputStream* output, bool heap) : DCmd(output, heap) { }
135 static const char* name() { return "JVMTI.data_dump"; }
136 static const char* description() {
137 return "Signal the JVM to do a data-dump request for JVMTI.";
138 }
139 static const char* impact() {
140 return "High";
141 }
142 virtual void execute(DCmdSource source, TRAPS);
143 };
144
145 #if INCLUDE_SERVICES
146 #if INCLUDE_JVMTI
147 class JVMTIAgentLoadDCmd : public DCmdWithParser {
148 protected:
149 DCmdArgument<char*> _libpath;
150 DCmdArgument<char*> _option;
151 public:
152 static int num_arguments() { return 2; }
153 JVMTIAgentLoadDCmd(outputStream* output, bool heap);
154 static const char* name() { return "JVMTI.agent_load"; }
155 static const char* description() {
156 return "Load JVMTI native agent.";
157 }
158 static const char* impact() { return "Low"; }
159 virtual void execute(DCmdSource source, TRAPS);
160 };
161 #endif // INCLUDE_JVMTI
162 #endif // INCLUDE_SERVICES
163
164 class VMDynamicLibrariesDCmd : public DCmd {
165 public:
166 VMDynamicLibrariesDCmd(outputStream* output, bool heap);
167 static const char* name() {
168 return "VM.dynlibs";
169 }
170 static const char* description() {
171 return "Print loaded dynamic libraries.";
172 }
173 static const char* impact() {
174 return "Low";
175 }
176 virtual void execute(DCmdSource source, TRAPS);
177 };
178
179 class VMUptimeDCmd : public DCmdWithParser {
180 protected:
181 DCmdArgument<bool> _date;
182 public:
183 static int num_arguments() { return 1; }
184 VMUptimeDCmd(outputStream* output, bool heap);
185 static const char* name() { return "VM.uptime"; }
186 static const char* description() {
187 return "Print VM uptime.";
188 }
189 static const char* impact() {
190 return "Low";
191 }
192 virtual void execute(DCmdSource source, TRAPS);
193 };
194
195 class VMInfoDCmd : public DCmd {
196 public:
197 VMInfoDCmd(outputStream* output, bool heap) : DCmd(output, heap) { }
198 static const char* name() { return "VM.info"; }
199 static const char* description() {
200 return "Print information about JVM environment and status.";
201 }
202 static const char* impact() { return "Low"; }
203 virtual void execute(DCmdSource source, TRAPS);
204 };
205
206 class SystemGCDCmd : public DCmd {
207 public:
208 SystemGCDCmd(outputStream* output, bool heap) : DCmd(output, heap) { }
209 static const char* name() { return "GC.run"; }
210 static const char* description() {
211 return "Call java.lang.System.gc().";
212 }
213 static const char* impact() {
214 return "Medium: Depends on Java heap size and content.";
215 }
216 virtual void execute(DCmdSource source, TRAPS);
217 };
218
219 class RunFinalizationDCmd : public DCmd {
220 public:
221 RunFinalizationDCmd(outputStream* output, bool heap) : DCmd(output, heap) { }
222 static const char* name() { return "GC.run_finalization"; }
223 static const char* description() {
224 return "Call java.lang.System.runFinalization().";
225 }
226 static const char* impact() {
227 return "Medium: Depends on Java content.";
228 }
229 virtual void execute(DCmdSource source, TRAPS);
230 };
231
232 class HeapInfoDCmd : public DCmd {
233 public:
234 HeapInfoDCmd(outputStream* output, bool heap) : DCmd(output, heap) { }
235 static const char* name() { return "GC.heap_info"; }
236 static const char* description() {
237 return "Provide generic Java heap information.";
238 }
239 static const char* impact() {
240 return "Medium";
241 }
242
243 virtual void execute(DCmdSource source, TRAPS);
244 };
245
246 class FinalizerInfoDCmd : public DCmd {
247 public:
248 FinalizerInfoDCmd(outputStream* output, bool heap) : DCmd(output, heap) { }
249 static const char* name() { return "GC.finalizer_info"; }
250 static const char* description() {
251 return "Provide information about Java finalization queue.";
252 }
253 static const char* impact() {
254 return "Medium";
255 }
256
257 virtual void execute(DCmdSource source, TRAPS);
258 };
259
260 #if INCLUDE_SERVICES // Heap dumping supported
261 // See also: dump_heap in attachListener.cpp
262 class HeapDumpDCmd : public DCmdWithParser {
263 protected:
264 DCmdArgument<char*> _filename;
265 DCmdArgument<bool> _all;
266 DCmdArgument<jlong> _gzip;
267 DCmdArgument<bool> _overwrite;
268 DCmdArgument<jlong> _parallel;
269 public:
270 static int num_arguments() { return 5; }
271 HeapDumpDCmd(outputStream* output, bool heap);
272 static const char* name() {
273 return "GC.heap_dump";
274 }
275 static const char* description() {
276 return "Generate a HPROF format dump of the Java heap.";
277 }
278 static const char* impact() {
279 return "High: Depends on Java heap size and content. "
280 "Request a full GC unless the '-all' option is specified.";
281 }
282 virtual void execute(DCmdSource source, TRAPS);
283 };
284 #endif // INCLUDE_SERVICES
285
286 // See also: inspectheap in attachListener.cpp
287 class ClassHistogramDCmd : public DCmdWithParser {
288 protected:
289 DCmdArgument<bool> _all;
290 DCmdArgument<jlong> _parallel_thread_num;
291 public:
292 static int num_arguments() { return 2; }
293 ClassHistogramDCmd(outputStream* output, bool heap);
294 static const char* name() {
295 return "GC.class_histogram";
296 }
297 static const char* description() {
298 return "Provide statistics about the Java heap usage.";
299 }
300 static const char* impact() {
301 return "High: Depends on Java heap size and content.";
302 }
303 virtual void execute(DCmdSource source, TRAPS);
304 };
305
306 class ClassHierarchyDCmd : public DCmdWithParser {
307 protected:
308 DCmdArgument<bool> _print_interfaces; // true if inherited interfaces should be printed.
309 DCmdArgument<bool> _print_subclasses; // true if subclasses of the specified classname should be printed.
310 DCmdArgument<char*> _classname; // Optional single class name whose hierarchy should be printed.
311 public:
312 static int num_arguments() { return 3; }
313 ClassHierarchyDCmd(outputStream* output, bool heap);
314 static const char* name() {
315 return "VM.class_hierarchy";
316 }
317 static const char* description() {
318 return "Print a list of all loaded classes, indented to show the class hierarchy. "
319 "The name of each class is followed by the ClassLoaderData* of its ClassLoader, "
320 "or \"null\" if loaded by the bootstrap class loader.";
321 }
322 static const char* impact() {
323 return "Medium: Depends on number of loaded classes.";
324 }
325 virtual void execute(DCmdSource source, TRAPS);
326 };
327
328 class PrintClassLayoutDCmd : public DCmdWithParser {
329 protected:
330 DCmdArgument<char*> _classname; // lass name whose layout should be printed.
331 public:
332 PrintClassLayoutDCmd(outputStream* output, bool heap);
333 static const char* name() {
334 return "VM.class_print_layout";
335 }
336 static const char* description() {
337 return "Print the layout of an instance of a class, including flat fields. "
338 "The name of each class is followed by the ClassLoaderData* of its ClassLoader, "
339 "or \"null\" if loaded by the bootstrap class loader.";
340 }
341 static const char* impact() {
342 return "Medium: Depends on number of loaded classes.";
343 }
344 static int num_arguments();
345 virtual void execute(DCmdSource source, TRAPS);
346 };
347
348 #if INCLUDE_CDS
349 class DumpSharedArchiveDCmd: public DCmdWithParser {
350 protected:
351 DCmdArgument<char*> _suboption; // option of VM.cds
352 DCmdArgument<char*> _filename; // file name, optional
353 public:
354 static int num_arguments() { return 2; }
355 DumpSharedArchiveDCmd(outputStream* output, bool heap);
356 static const char* name() {
357 return "VM.cds";
358 }
359 static const char* description() {
360 return "Dump a static or dynamic shared archive including all shareable classes";
361 }
362 static const char* impact() {
363 return "Medium: Pause time depends on number of loaded classes";
364 }
365 virtual void execute(DCmdSource source, TRAPS);
366 };
367 #endif // INCLUDE_CDS
368
369 // See also: thread_dump in attachListener.cpp
370 class ThreadDumpDCmd : public DCmdWithParser {
371 protected:
372 DCmdArgument<bool> _locks;
373 DCmdArgument<bool> _extended;
374 public:
375 static int num_arguments() { return 2; }
376 ThreadDumpDCmd(outputStream* output, bool heap);
377 static const char* name() { return "Thread.print"; }
378 static const char* description() {
379 return "Print all threads with stacktraces.";
380 }
381 static const char* impact() {
382 return "Medium: Depends on the number of threads.";
383 }
384 virtual void execute(DCmdSource source, TRAPS);
385 };
386
387 // Enhanced JMX Agent support
388
389 class JMXStartRemoteDCmd : public DCmdWithParser {
390
391 // Explicitly list all properties that could be
392 // passed to Agent.startRemoteManagementAgent()
393 // com.sun.management is omitted
394
395 DCmdArgument<char *> _config_file;
396 DCmdArgument<char *> _jmxremote_host;
397 DCmdArgument<char *> _jmxremote_port;
398 DCmdArgument<char *> _jmxremote_rmi_port;
399 DCmdArgument<char *> _jmxremote_ssl;
400 DCmdArgument<char *> _jmxremote_registry_ssl;
401 DCmdArgument<char *> _jmxremote_authenticate;
402 DCmdArgument<char *> _jmxremote_password_file;
403 DCmdArgument<char *> _jmxremote_access_file;
404 DCmdArgument<char *> _jmxremote_login_config;
405 DCmdArgument<char *> _jmxremote_ssl_enabled_cipher_suites;
406 DCmdArgument<char *> _jmxremote_ssl_enabled_protocols;
407 DCmdArgument<char *> _jmxremote_ssl_need_client_auth;
408 DCmdArgument<char *> _jmxremote_ssl_config_file;
409
410 // JDP support
411 // Keep autodiscovery char* not bool to pass true/false
412 // as property value to java level.
413 DCmdArgument<char *> _jmxremote_autodiscovery;
414 DCmdArgument<jlong> _jdp_port;
415 DCmdArgument<char *> _jdp_address;
416 DCmdArgument<char *> _jdp_source_addr;
417 DCmdArgument<jlong> _jdp_ttl;
418 DCmdArgument<jlong> _jdp_pause;
419 DCmdArgument<char *> _jdp_name;
420
421 public:
422 static int num_arguments() { return 21; }
423
424 JMXStartRemoteDCmd(outputStream *output, bool heap_allocated);
425
426 static const char *name() {
427 return "ManagementAgent.start";
428 }
429
430 static const char *description() {
431 return "Start remote management agent.";
432 }
433
434 virtual void execute(DCmdSource source, TRAPS);
435 };
436
437 class JMXStartLocalDCmd : public DCmd {
438
439 // Explicitly request start of local agent,
440 // it will not be started by start dcmd
441
442
443 public:
444 JMXStartLocalDCmd(outputStream *output, bool heap_allocated);
445
446 static const char *name() {
447 return "ManagementAgent.start_local";
448 }
449
450 static const char *description() {
451 return "Start local management agent.";
452 }
453
454 virtual void execute(DCmdSource source, TRAPS);
455
456 };
457
458 class JMXStopRemoteDCmd : public DCmd {
459 public:
460 JMXStopRemoteDCmd(outputStream *output, bool heap_allocated) :
461 DCmd(output, heap_allocated) {
462 // Do Nothing
463 }
464
465 static const char *name() {
466 return "ManagementAgent.stop";
467 }
468
469 static const char *description() {
470 return "Stop remote management agent.";
471 }
472
473 virtual void execute(DCmdSource source, TRAPS);
474 };
475
476 // Print the JMX system status
477 class JMXStatusDCmd : public DCmd {
478 public:
479 JMXStatusDCmd(outputStream *output, bool heap_allocated);
480
481 static const char *name() {
482 return "ManagementAgent.status";
483 }
484
485 static const char *description() {
486 return "Print the management agent status.";
487 }
488
489 virtual void execute(DCmdSource source, TRAPS);
490
491 };
492
493 class CompileQueueDCmd : public DCmd {
494 public:
495 CompileQueueDCmd(outputStream* output, bool heap) : DCmd(output, heap) {}
496 static const char* name() {
497 return "Compiler.queue";
498 }
499 static const char* description() {
500 return "Print methods queued for compilation.";
501 }
502 static const char* impact() {
503 return "Low";
504 }
505 virtual void execute(DCmdSource source, TRAPS);
506 };
507
508 #ifdef LINUX
509 class PerfMapDCmd : public DCmdWithParser {
510 protected:
511 DCmdArgument<char*> _filename;
512 public:
513 static int num_arguments() { return 1; }
514 PerfMapDCmd(outputStream* output, bool heap);
515 static const char* name() {
516 return "Compiler.perfmap";
517 }
518 static const char* description() {
519 return "Write map file for Linux perf tool.";
520 }
521 static const char* impact() {
522 return "Low";
523 }
524 virtual void execute(DCmdSource source, TRAPS);
525 };
526 #endif // LINUX
527
528 class CodeListDCmd : public DCmd {
529 public:
530 CodeListDCmd(outputStream* output, bool heap) : DCmd(output, heap) {}
531 static const char* name() {
532 return "Compiler.codelist";
533 }
534 static const char* description() {
535 return "Print all compiled methods in code cache that are alive";
536 }
537 static const char* impact() {
538 return "Medium";
539 }
540 virtual void execute(DCmdSource source, TRAPS);
541 };
542
543 class CodeCacheDCmd : public DCmd {
544 public:
545 CodeCacheDCmd(outputStream* output, bool heap) : DCmd(output, heap) {}
546 static const char* name() {
547 return "Compiler.codecache";
548 }
549 static const char* description() {
550 return "Print code cache layout and bounds.";
551 }
552 static const char* impact() {
553 return "Low";
554 }
555 virtual void execute(DCmdSource source, TRAPS);
556 };
557
558 //---< BEGIN >--- CodeHeap State Analytics.
559 class CodeHeapAnalyticsDCmd : public DCmdWithParser {
560 protected:
561 DCmdArgument<char*> _function;
562 DCmdArgument<jlong> _granularity;
563 public:
564 static int num_arguments() { return 2; }
565 CodeHeapAnalyticsDCmd(outputStream* output, bool heap);
566 static const char* name() {
567 return "Compiler.CodeHeap_Analytics";
568 }
569 static const char* description() {
570 return "Print CodeHeap analytics";
571 }
572 static const char* impact() {
573 return "Low: Depends on code heap size and content. "
574 "Holds CodeCache_lock during analysis step, usually sub-second duration.";
575 }
576 virtual void execute(DCmdSource source, TRAPS);
577 };
578 //---< END >--- CodeHeap State Analytics.
579
580 class CompilerDirectivesPrintDCmd : public DCmd {
581 public:
582 CompilerDirectivesPrintDCmd(outputStream* output, bool heap) : DCmd(output, heap) {}
583 static const char* name() {
584 return "Compiler.directives_print";
585 }
586 static const char* description() {
587 return "Print all active compiler directives.";
588 }
589 static const char* impact() {
590 return "Low";
591 }
592 virtual void execute(DCmdSource source, TRAPS);
593 };
594
595 class CompilerDirectivesRemoveDCmd : public DCmd {
596 public:
597 CompilerDirectivesRemoveDCmd(outputStream* output, bool heap) : DCmd(output, heap) {}
598 static const char* name() {
599 return "Compiler.directives_remove";
600 }
601 static const char* description() {
602 return "Remove latest added compiler directive.";
603 }
604 static const char* impact() {
605 return "Low";
606 }
607 virtual void execute(DCmdSource source, TRAPS);
608 };
609
610 class CompilerDirectivesAddDCmd : public DCmdWithParser {
611 protected:
612 DCmdArgument<char*> _filename;
613 public:
614 static int num_arguments() { return 1; }
615 CompilerDirectivesAddDCmd(outputStream* output, bool heap);
616 static const char* name() {
617 return "Compiler.directives_add";
618 }
619 static const char* description() {
620 return "Add compiler directives from file.";
621 }
622 static const char* impact() {
623 return "Low";
624 }
625 virtual void execute(DCmdSource source, TRAPS);
626 };
627
628 class CompilerDirectivesClearDCmd : public DCmd {
629 public:
630 CompilerDirectivesClearDCmd(outputStream* output, bool heap) : DCmd(output, heap) {}
631 static const char* name() {
632 return "Compiler.directives_clear";
633 }
634 static const char* description() {
635 return "Remove all compiler directives.";
636 }
637 static const char* impact() {
638 return "Low";
639 }
640 virtual void execute(DCmdSource source, TRAPS);
641 };
642
643 ///////////////////////////////////////////////////////////////////////
644 //
645 // jcmd command support for symbol table, string table and system dictionary dumping:
646 // VM.symboltable -verbose: for dumping the symbol table
647 // VM.stringtable -verbose: for dumping the string table
648 // VM.systemdictionary -verbose: for dumping the system dictionary table
649 //
650 class VM_DumpHashtable : public VM_Operation {
651 private:
652 outputStream* _out;
653 int _which;
654 bool _verbose;
655 public:
656 enum {
657 DumpSymbols = 1 << 0,
658 DumpStrings = 1 << 1,
659 DumpSysDict = 1 << 2 // not implemented yet
660 };
661 VM_DumpHashtable(outputStream* out, int which, bool verbose) {
662 _out = out;
663 _which = which;
664 _verbose = verbose;
665 }
666
667 virtual VMOp_Type type() const { return VMOp_DumpHashtable; }
668
669 virtual void doit() {
670 switch (_which) {
671 case DumpSymbols:
672 SymbolTable::dump(_out, _verbose);
673 break;
674 case DumpStrings:
675 StringTable::dump(_out, _verbose);
676 break;
677 case DumpSysDict:
678 SystemDictionary::dump(_out, _verbose);
679 break;
680 default:
681 ShouldNotReachHere();
682 }
683 }
684 };
685
686 class SymboltableDCmd : public DCmdWithParser {
687 protected:
688 DCmdArgument<bool> _verbose;
689 public:
690 static int num_arguments() { return 1; }
691 SymboltableDCmd(outputStream* output, bool heap);
692 static const char* name() {
693 return "VM.symboltable";
694 }
695 static const char* description() {
696 return "Dump symbol table.";
697 }
698 static const char* impact() {
699 return "Medium: Depends on Java content.";
700 }
701 virtual void execute(DCmdSource source, TRAPS);
702 };
703
704 class StringtableDCmd : public DCmdWithParser {
705 protected:
706 DCmdArgument<bool> _verbose;
707 public:
708 static int num_arguments() { return 1; }
709 StringtableDCmd(outputStream* output, bool heap);
710 static const char* name() {
711 return "VM.stringtable";
712 }
713 static const char* description() {
714 return "Dump string table.";
715 }
716 static const char* impact() {
717 return "Medium: Depends on Java content.";
718 }
719 virtual void execute(DCmdSource source, TRAPS);
720 };
721
722 class SystemDictionaryDCmd : public DCmdWithParser {
723 protected:
724 DCmdArgument<bool> _verbose;
725 public:
726 static int num_arguments() { return 1; }
727 SystemDictionaryDCmd(outputStream* output, bool heap);
728 static const char* name() {
729 return "VM.systemdictionary";
730 }
731 static const char* description() {
732 return "Prints the statistics for dictionary hashtable sizes and bucket length";
733 }
734 static const char* impact() {
735 return "Medium: Depends on Java content.";
736 }
737 virtual void execute(DCmdSource source, TRAPS);
738 };
739
740 class ClassesDCmd : public DCmdWithParser {
741 protected:
742 DCmdArgument<bool> _verbose;
743 public:
744 static int num_arguments() { return 1; }
745 ClassesDCmd(outputStream* output, bool heap);
746 static const char* name() {
747 return "VM.classes";
748 }
749 static const char* description() {
750 return "Print all loaded classes";
751 }
752 static const char* impact() {
753 return "Medium: Depends on number of loaded classes.";
754 }
755 virtual void execute(DCmdSource source, TRAPS);
756 };
757
758 class EventLogDCmd : public DCmdWithParser {
759 protected:
760 DCmdArgument<char*> _log;
761 DCmdArgument<jlong> _max;
762 public:
763 static int num_arguments() { return 2; }
764 EventLogDCmd(outputStream* output, bool heap);
765 static const char* name() {
766 return "VM.events";
767 }
768 static const char* description() {
769 return "Print VM event logs";
770 }
771 static const char* impact() {
772 return "Low: Depends on event log size. ";
773 }
774 virtual void execute(DCmdSource source, TRAPS);
775 };
776
777 class ThreadDumpToFileDCmd : public DCmdWithParser {
778 private:
779 void dumpToFile(Symbol* name, Symbol* signature, const char* path, bool overwrite, TRAPS);
780 protected:
781 DCmdArgument<bool> _overwrite;
782 DCmdArgument<char*> _format;
783 DCmdArgument<char*> _filepath;
784 public:
785 static int num_arguments() { return 3; }
786 ThreadDumpToFileDCmd(outputStream *output, bool heap);
787 static const char *name() {
788 return "Thread.dump_to_file";
789 }
790 static const char *description() {
791 return "Dump threads, with stack traces, to a file in plain text or JSON format.";
792 }
793 static const char* impact() {
794 return "Medium: Depends on the number of threads.";
795 }
796 virtual void execute(DCmdSource source, TRAPS);
797 };
798
799 class VThreadSchedulerDCmd : public DCmd {
800 public:
801 VThreadSchedulerDCmd(outputStream* output, bool heap) : DCmd(output, heap) { }
802 static const char* name() {
803 return "Thread.vthread_scheduler";
804 }
805 static const char* description() {
806 return "Print the virtual thread scheduler, and the delayed task schedulers that support "
807 "virtual threads doing timed operations.";
808 }
809 static const char* impact() { return "Low"; }
810 virtual void execute(DCmdSource source, TRAPS);
811 };
812
813 class VThreadPollersDCmd : public DCmd {
814 public:
815 VThreadPollersDCmd(outputStream* output, bool heap) : DCmd(output, heap) { }
816 static const char* name() {
817 return "Thread.vthread_pollers";
818 }
819 static const char* description() {
820 return "Print the I/O pollers that support virtual threads doing blocking network I/O operations.";
821 }
822 static const char* impact() { return "Low"; }
823 virtual void execute(DCmdSource source, TRAPS);
824 };
825
826 class CompilationMemoryStatisticDCmd: public DCmdWithParser {
827 protected:
828 DCmdArgument<bool> _verbose;
829 DCmdArgument<bool> _legend;
830 DCmdArgument<MemorySizeArgument> _minsize;
831 public:
832 static int num_arguments() { return 3; }
833 CompilationMemoryStatisticDCmd(outputStream* output, bool heap);
834 static const char* name() {
835 return "Compiler.memory";
836 }
837 static const char* description() {
838 return "Print compilation footprint";
839 }
840 static const char* impact() {
841 return "Medium: Pause time depends on number of compiled methods";
842 }
843 virtual void execute(DCmdSource source, TRAPS);
844 };
845
846 #if defined(LINUX) || defined(_WIN64) || defined(__APPLE__)
847
848 class SystemMapDCmd : public DCmd {
849 public:
850 SystemMapDCmd(outputStream* output, bool heap);
851 static const char* name() { return "System.map"; }
852 static const char* description() {
853 return "Prints an annotated process memory map of the VM process (linux, Windows and MacOS only).";
854 }
855 static const char* impact() { return "Medium; can be high for very large java heaps."; }
856 virtual void execute(DCmdSource source, TRAPS);
857 };
858
859 class SystemDumpMapDCmd : public DCmdWithParser {
860 DCmdArgument<char*> _filename;
861 public:
862 static int num_arguments() { return 1; }
863 SystemDumpMapDCmd(outputStream* output, bool heap);
864 static const char* name() { return "System.dump_map"; }
865 static const char* description() {
866 return "Dumps an annotated process memory map to an output file (linux, Windows and MacOS only).";
867 }
868 static const char* impact() { return "Medium; can be high for very large java heaps."; }
869 virtual void execute(DCmdSource source, TRAPS);
870 };
871
872 #endif // LINUX, WINDOWS or MACOS
873
874 #endif // SHARE_SERVICES_DIAGNOSTICCOMMAND_HPP