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 #include "cds/cdsConfig.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/metaspaceUtils.hpp"
41 #include "memory/metaspace/metaspaceDCmd.hpp"
42 #include "memory/resourceArea.hpp"
43 #include "memory/universe.hpp"
44 #include "nmt/memMapPrinter.hpp"
45 #include "nmt/memTracker.hpp"
46 #include "nmt/nmtDCmd.hpp"
47 #include "oops/instanceKlass.hpp"
48 #include "oops/objArrayOop.inline.hpp"
49 #include "oops/oop.inline.hpp"
50 #include "oops/typeArrayOop.inline.hpp"
51 #include "prims/jvmtiAgentList.hpp"
52 #include "runtime/fieldDescriptor.inline.hpp"
53 #include "runtime/flags/jvmFlag.hpp"
54 #include "runtime/handles.inline.hpp"
55 #include "runtime/javaCalls.hpp"
56 #include "runtime/jniHandles.hpp"
57 #include "runtime/os.hpp"
58 #include "runtime/vmOperations.hpp"
59 #include "runtime/vm_version.hpp"
60 #include "services/diagnosticArgument.hpp"
61 #include "services/diagnosticCommand.hpp"
62 #include "services/diagnosticFramework.hpp"
63 #include "services/heapDumper.hpp"
64 #include "services/management.hpp"
65 #include "services/writeableFlags.hpp"
66 #include "utilities/debug.hpp"
67 #include "utilities/events.hpp"
68 #include "utilities/formatBuffer.hpp"
69 #include "utilities/macros.hpp"
70 #include "utilities/parseInteger.hpp"
71 #ifdef LINUX
72 #include "os_posix.hpp"
73 #include "mallocInfoDcmd.hpp"
74 #include "trimCHeapDCmd.hpp"
75 #include <errno.h>
76 #endif
77
78 static void loadAgentModule(TRAPS) {
79 ResourceMark rm(THREAD);
80 HandleMark hm(THREAD);
81
82 JavaValue result(T_OBJECT);
83 Handle h_module_name = java_lang_String::create_from_str("jdk.management.agent", CHECK);
84 JavaCalls::call_static(&result,
85 vmClasses::module_Modules_klass(),
86 vmSymbols::loadModule_name(),
87 vmSymbols::loadModule_signature(),
88 h_module_name,
89 THREAD);
90 }
91
92 void DCmd::register_dcmds(){
93 // Registration of the diagnostic commands
94 // First argument specifies which interfaces will export the command
95 // Second argument specifies if the command is enabled
96 // Third argument specifies if the command is hidden
97 uint32_t full_export = DCmd_Source_Internal | DCmd_Source_AttachAPI
98 | DCmd_Source_MBean;
99 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<HelpDCmd>(full_export, true, false));
100 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VersionDCmd>(full_export, true, false));
101 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CommandLineDCmd>(full_export, true, false));
102 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<PrintSystemPropertiesDCmd>(full_export, true, false));
103 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<PrintVMFlagsDCmd>(full_export, true, false));
104 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SetVMFlagDCmd>(full_export, true, false));
105 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VMDynamicLibrariesDCmd>(full_export, true, false));
106 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VMUptimeDCmd>(full_export, true, false));
107 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VMInfoDCmd>(full_export, true, false));
108 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SystemGCDCmd>(full_export, true, false));
109 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<RunFinalizationDCmd>(full_export, true, false));
110 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<HeapInfoDCmd>(full_export, true, false));
111 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<FinalizerInfoDCmd>(full_export, true, false));
112 #if INCLUDE_SERVICES
113 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<HeapDumpDCmd>(DCmd_Source_Internal | DCmd_Source_AttachAPI, true, false));
114 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassHistogramDCmd>(full_export, true, false));
115 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SystemDictionaryDCmd>(full_export, true, false));
116 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassHierarchyDCmd>(full_export, true, false));
117 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassesDCmd>(full_export, true, false));
118 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SymboltableDCmd>(full_export, true, false));
119 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<StringtableDCmd>(full_export, true, false));
120 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<metaspace::MetaspaceDCmd>(full_export, true, false));
121 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<PrintClassLayoutDCmd>(full_export, true, false));
122 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<EventLogDCmd>(full_export, true, false));
123 #if INCLUDE_JVMTI // Both JVMTI and SERVICES have to be enabled to have this dcmd
124 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JVMTIAgentLoadDCmd>(full_export, true, false));
125 #endif // INCLUDE_JVMTI
126 #endif // INCLUDE_SERVICES
127 #if INCLUDE_JVMTI
128 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JVMTIDataDumpDCmd>(full_export, true, false));
129 #endif // INCLUDE_JVMTI
130 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ThreadDumpDCmd>(full_export, true, false));
131 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ThreadDumpToFileDCmd>(full_export, true, false));
132 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VThreadSchedulerDCmd>(full_export, true, false));
133 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VThreadPollersDCmd>(full_export, true, false));
134 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassLoaderStatsDCmd>(full_export, true, false));
135 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassLoaderHierarchyDCmd>(full_export, true, false));
136 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompileQueueDCmd>(full_export, true, false));
137 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CodeListDCmd>(full_export, true, false));
138 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CodeCacheDCmd>(full_export, true, false));
139 #ifdef LINUX
140 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<PerfMapDCmd>(full_export, true, false));
141 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<TrimCLibcHeapDCmd>(full_export, true, false));
142 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<MallocInfoDcmd>(full_export, true, false));
143 #endif // LINUX
144 #if defined(LINUX) || defined(_WIN64) || defined(__APPLE__)
145 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SystemMapDCmd>(full_export, true,false));
146 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SystemDumpMapDCmd>(full_export, true,false));
147 #endif // LINUX or WINDOWS or MacOS
148 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CodeHeapAnalyticsDCmd>(full_export, true, false));
149
150 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesPrintDCmd>(full_export, true, false));
151 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesAddDCmd>(full_export, true, false));
152 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesRemoveDCmd>(full_export, true, false));
153 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesClearDCmd>(full_export, true, false));
154 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilationMemoryStatisticDCmd>(full_export, true, false));
155
156 // Enhanced JMX Agent Support
157 // These commands not currently exported via the DiagnosticCommandMBean
158 uint32_t jmx_agent_export_flags = DCmd_Source_Internal | DCmd_Source_AttachAPI;
159 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStartRemoteDCmd>(jmx_agent_export_flags, true,false));
160 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStartLocalDCmd>(jmx_agent_export_flags, true,false));
161 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStopRemoteDCmd>(jmx_agent_export_flags, true,false));
162 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStatusDCmd>(jmx_agent_export_flags, true,false));
163
164 #if INCLUDE_CDS
165 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<DumpSharedArchiveDCmd>(full_export, true, false));
166 #endif // INCLUDE_CDS
167
168 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<NMTDCmd>(full_export, true, false));
169 }
170
171 HelpDCmd::HelpDCmd(outputStream* output, bool heap) : DCmdWithParser(output, heap),
172 _all("-all", "Show help for all commands", "BOOLEAN", false, "false"),
173 _cmd("command name", "The name of the command for which we want help",
174 "STRING", false) {
175 _dcmdparser.add_dcmd_option(&_all);
176 _dcmdparser.add_dcmd_argument(&_cmd);
177 };
178
179
180 static int compare_strings(const char** s1, const char** s2) {
181 return ::strcmp(*s1, *s2);
182 }
183
184 void HelpDCmd::execute(DCmdSource source, TRAPS) {
185 if (_all.value()) {
186 GrowableArray<const char*>* cmd_list = DCmdFactory::DCmd_list(source);
187 cmd_list->sort(compare_strings);
188 for (int i = 0; i < cmd_list->length(); i++) {
189 DCmdFactory* factory = DCmdFactory::factory(source, cmd_list->at(i),
190 strlen(cmd_list->at(i)));
191 output()->print_cr("%s%s", factory->name(),
192 factory->is_enabled() ? "" : " [disabled]");
193 output()->print_cr("\t%s", factory->description());
194 output()->cr();
195 factory = factory->next();
196 }
197 } else if (_cmd.has_value()) {
198 DCmd* cmd = nullptr;
199 DCmdFactory* factory = DCmdFactory::factory(source, _cmd.value(),
200 strlen(_cmd.value()));
201 if (factory != nullptr) {
202 output()->print_cr("%s%s", factory->name(),
203 factory->is_enabled() ? "" : " [disabled]");
204 output()->print_cr("%s", factory->description());
205 output()->print_cr("\nImpact: %s", factory->impact());
206 output()->cr();
207 cmd = factory->create_resource_instance(output());
208 if (cmd != nullptr) {
209 DCmdMark mark(cmd);
210 cmd->print_help(factory->name());
211 }
212 } else {
213 output()->print_cr("Help unavailable : '%s' : No such command", _cmd.value());
214 }
215 } else {
216 output()->print_cr("The following commands are available:");
217 GrowableArray<const char *>* cmd_list = DCmdFactory::DCmd_list(source);
218 cmd_list->sort(compare_strings);
219 for (int i = 0; i < cmd_list->length(); i++) {
220 DCmdFactory* factory = DCmdFactory::factory(source, cmd_list->at(i),
221 strlen(cmd_list->at(i)));
222 output()->print_cr("%s%s", factory->name(),
223 factory->is_enabled() ? "" : " [disabled]");
224 factory = factory->_next;
225 }
226 output()->print_cr("\nFor more information about a specific command use 'help <command>'.");
227 }
228 }
229
230 void VersionDCmd::execute(DCmdSource source, TRAPS) {
231 output()->print_cr("%s version %s", VM_Version::vm_name(),
232 VM_Version::vm_release());
233 JDK_Version jdk_version = JDK_Version::current();
234 if (jdk_version.patch_version() > 0) {
235 output()->print_cr("JDK %d.%d.%d.%d", jdk_version.major_version(),
236 jdk_version.minor_version(), jdk_version.security_version(),
237 jdk_version.patch_version());
238 } else {
239 output()->print_cr("JDK %d.%d.%d", jdk_version.major_version(),
240 jdk_version.minor_version(), jdk_version.security_version());
241 }
242 }
243
244 PrintVMFlagsDCmd::PrintVMFlagsDCmd(outputStream* output, bool heap) :
245 DCmdWithParser(output, heap),
246 _all("-all", "Print all flags supported by the VM", "BOOLEAN", false, "false") {
247 _dcmdparser.add_dcmd_option(&_all);
248 }
249
250 void PrintVMFlagsDCmd::execute(DCmdSource source, TRAPS) {
251 if (_all.value()) {
252 JVMFlag::printFlags(output(), true);
253 } else {
254 JVMFlag::printSetFlags(output());
255 }
256 }
257
258 SetVMFlagDCmd::SetVMFlagDCmd(outputStream* output, bool heap) :
259 DCmdWithParser(output, heap),
260 _flag("flag name", "The name of the flag we want to set",
261 "STRING", true),
262 _value("string value", "The value we want to set", "STRING", false) {
263 _dcmdparser.add_dcmd_argument(&_flag);
264 _dcmdparser.add_dcmd_argument(&_value);
265 }
266
267 void SetVMFlagDCmd::execute(DCmdSource source, TRAPS) {
268 const char* val = nullptr;
269 if (_value.value() != nullptr) {
270 val = _value.value();
271 }
272
273 FormatBuffer<80> err_msg("%s", "");
274 int ret = WriteableFlags::set_flag(_flag.value(), val, JVMFlagOrigin::MANAGEMENT, err_msg);
275
276 if (ret != JVMFlag::SUCCESS) {
277 output()->print_cr("%s", err_msg.buffer());
278 }
279 }
280
281 void JVMTIDataDumpDCmd::execute(DCmdSource source, TRAPS) {
282 if (JvmtiExport::should_post_data_dump()) {
283 JvmtiExport::post_data_dump();
284 }
285 }
286
287 #if INCLUDE_SERVICES
288 #if INCLUDE_JVMTI
289 JVMTIAgentLoadDCmd::JVMTIAgentLoadDCmd(outputStream* output, bool heap) :
290 DCmdWithParser(output, heap),
291 _libpath("library path", "Absolute path of the JVMTI agent to load.",
292 "STRING", true),
293 _option("agent option", "Option string to pass the agent.", "STRING", false) {
294 _dcmdparser.add_dcmd_argument(&_libpath);
295 _dcmdparser.add_dcmd_argument(&_option);
296 }
297
298 void JVMTIAgentLoadDCmd::execute(DCmdSource source, TRAPS) {
299
300 if (_libpath.value() == nullptr) {
301 output()->print_cr("JVMTI.agent_load dcmd needs library path.");
302 return;
303 }
304
305 char *suffix = strrchr(_libpath.value(), '.');
306 bool is_java_agent = (suffix != nullptr) && (strncmp(".jar", suffix, 4) == 0);
307
308 if (is_java_agent) {
309 if (_option.value() == nullptr) {
310 JvmtiAgentList::load_agent("instrument", false, _libpath.value(), output());
311 } else {
312 size_t opt_len = strlen(_libpath.value()) + strlen(_option.value()) + 2;
313 if (opt_len > 4096) {
314 output()->print_cr("JVMTI agent attach failed: Options is too long.");
315 return;
316 }
317
318 char *opt = (char *)os::malloc(opt_len, mtInternal);
319 if (opt == nullptr) {
320 output()->print_cr("JVMTI agent attach failed: "
321 "Could not allocate %zu bytes for argument.",
322 opt_len);
323 return;
324 }
325
326 jio_snprintf(opt, opt_len, "%s=%s", _libpath.value(), _option.value());
327 JvmtiAgentList::load_agent("instrument", false, opt, output());
328
329 os::free(opt);
330 }
331 } else {
332 JvmtiAgentList::load_agent(_libpath.value(), true, _option.value(), output());
333 }
334 }
335
336 #endif // INCLUDE_JVMTI
337 #endif // INCLUDE_SERVICES
338
339 void PrintSystemPropertiesDCmd::execute(DCmdSource source, TRAPS) {
340 // load VMSupport
341 Symbol* klass = vmSymbols::jdk_internal_vm_VMSupport();
342 Klass* k = SystemDictionary::resolve_or_fail(klass, true, CHECK);
343 InstanceKlass* ik = InstanceKlass::cast(k);
344 if (ik->should_be_initialized()) {
345 ik->initialize(THREAD);
346 }
347 if (HAS_PENDING_EXCEPTION) {
348 java_lang_Throwable::print(PENDING_EXCEPTION, output());
349 output()->cr();
350 CLEAR_PENDING_EXCEPTION;
351 return;
352 }
353
354 // invoke the serializePropertiesToByteArray method
355 JavaValue result(T_OBJECT);
356 JavaCallArguments args;
357
358 Symbol* signature = vmSymbols::void_byte_array_signature();
359 JavaCalls::call_static(&result,
360 ik,
361 vmSymbols::serializePropertiesToByteArray_name(),
362 signature,
363 &args,
364 THREAD);
365 if (HAS_PENDING_EXCEPTION) {
366 java_lang_Throwable::print(PENDING_EXCEPTION, output());
367 output()->cr();
368 CLEAR_PENDING_EXCEPTION;
369 return;
370 }
371
372 // The result should be a [B
373 oop res = result.get_oop();
374 assert(res->is_typeArray(), "just checking");
375 assert(TypeArrayKlass::cast(res->klass())->element_type() == T_BYTE, "just checking");
376
377 // copy the bytes to the output stream
378 typeArrayOop ba = typeArrayOop(res);
379 jbyte* addr = typeArrayOop(res)->byte_at_addr(0);
380 output()->print_raw((const char*)addr, ba->length());
381 }
382
383 VMUptimeDCmd::VMUptimeDCmd(outputStream* output, bool heap) :
384 DCmdWithParser(output, heap),
385 _date("-date", "Add a prefix with current date", "BOOLEAN", false, "false") {
386 _dcmdparser.add_dcmd_option(&_date);
387 }
388
389 void VMUptimeDCmd::execute(DCmdSource source, TRAPS) {
390 if (_date.value()) {
391 output()->date_stamp(true, "", ": ");
392 }
393 output()->time_stamp().update_to(tty->time_stamp().ticks());
394 output()->stamp();
395 output()->print_cr(" s");
396 }
397
398 void VMInfoDCmd::execute(DCmdSource source, TRAPS) {
399 VMError::print_vm_info(_output);
400 }
401
402 void SystemGCDCmd::execute(DCmdSource source, TRAPS) {
403 Universe::heap()->collect(GCCause::_dcmd_gc_run);
404 }
405
406 void RunFinalizationDCmd::execute(DCmdSource source, TRAPS) {
407 Klass* k = vmClasses::System_klass();
408 JavaValue result(T_VOID);
409 JavaCalls::call_static(&result, k,
410 vmSymbols::run_finalization_name(),
411 vmSymbols::void_method_signature(), CHECK);
412 }
413
414 void HeapInfoDCmd::execute(DCmdSource source, TRAPS) {
415 MutexLocker hl(THREAD, Heap_lock);
416 Universe::heap()->print_heap_on(output());
417 MetaspaceUtils::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", "FILE",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, 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, 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, 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, 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 PerfMapDCmd::PerfMapDCmd(outputStream* output, bool heap) :
855 DCmdWithParser(output, heap),
856 _filename("filename", "Name of the map file", "FILE", false, DEFAULT_PERFMAP_FILENAME)
857 {
858 _dcmdparser.add_dcmd_argument(&_filename);
859 }
860
861 void PerfMapDCmd::execute(DCmdSource source, TRAPS) {
862 CodeCache::write_perf_map(_filename.value(), output());
863 }
864 #endif // LINUX
865
866 //---< BEGIN >--- CodeHeap State Analytics.
867 CodeHeapAnalyticsDCmd::CodeHeapAnalyticsDCmd(outputStream* output, bool heap) :
868 DCmdWithParser(output, heap),
869 _function("function", "Function to be performed (aggregate, UsedSpace, FreeSpace, MethodCount, MethodSpace, MethodAge, MethodNames, discard", "STRING", false, "all"),
870 _granularity("granularity", "Detail level - smaller value -> more detail", "INT", false, "4096") {
871 _dcmdparser.add_dcmd_argument(&_function);
872 _dcmdparser.add_dcmd_argument(&_granularity);
873 }
874
875 void CodeHeapAnalyticsDCmd::execute(DCmdSource source, TRAPS) {
876 jlong granularity = _granularity.value();
877 if (granularity < 1) {
878 Exceptions::fthrow(THREAD_AND_LOCATION, vmSymbols::java_lang_IllegalArgumentException(),
879 "Invalid granularity value " JLONG_FORMAT ". Should be positive.\n", granularity);
880 return;
881 }
882
883 CompileBroker::print_heapinfo(output(), _function.value(), granularity);
884 }
885 //---< END >--- CodeHeap State Analytics.
886
887 EventLogDCmd::EventLogDCmd(outputStream* output, bool heap) :
888 DCmdWithParser(output, heap),
889 _log("log", "Name of log to be printed. If omitted, all logs are printed.", "STRING", false, nullptr),
890 _max("max", "Maximum number of events to be printed (newest first). If omitted or zero, all events are printed.", "INT", false, "0")
891 {
892 _dcmdparser.add_dcmd_option(&_log);
893 _dcmdparser.add_dcmd_option(&_max);
894 }
895
896 void EventLogDCmd::execute(DCmdSource source, TRAPS) {
897 int max = (int)_max.value();
898 if (max < 0) {
899 output()->print_cr("Invalid max option: \"%d\".", max);
900 return;
901 }
902 const char* log_name = _log.value();
903 if (log_name != nullptr) {
904 Events::print_one(output(), log_name, max);
905 } else {
906 Events::print_all(output(), max);
907 }
908 }
909
910 void CompilerDirectivesPrintDCmd::execute(DCmdSource source, TRAPS) {
911 DirectivesStack::print(output());
912 }
913
914 CompilerDirectivesAddDCmd::CompilerDirectivesAddDCmd(outputStream* output, bool heap) :
915 DCmdWithParser(output, heap),
916 _filename("filename","Name of the directives file", "STRING",true) {
917 _dcmdparser.add_dcmd_argument(&_filename);
918 }
919
920 void CompilerDirectivesAddDCmd::execute(DCmdSource source, TRAPS) {
921 DirectivesParser::parse_from_file(_filename.value(), output(), true);
922 }
923
924 void CompilerDirectivesRemoveDCmd::execute(DCmdSource source, TRAPS) {
925 DirectivesStack::pop(1);
926 }
927
928 void CompilerDirectivesClearDCmd::execute(DCmdSource source, TRAPS) {
929 DirectivesStack::clear();
930 }
931 #if INCLUDE_SERVICES
932 ClassHierarchyDCmd::ClassHierarchyDCmd(outputStream* output, bool heap) :
933 DCmdWithParser(output, heap),
934 _print_interfaces("-i", "Inherited interfaces should be printed.", "BOOLEAN", false, "false"),
935 _print_subclasses("-s", "If a classname is specified, print its subclasses "
936 "in addition to its superclasses. Without this option only the "
937 "superclasses will be printed.", "BOOLEAN", false, "false"),
938 _classname("classname", "Name of class whose hierarchy should be printed. "
939 "If not specified, all class hierarchies are printed.",
940 "STRING", false) {
941 _dcmdparser.add_dcmd_option(&_print_interfaces);
942 _dcmdparser.add_dcmd_option(&_print_subclasses);
943 _dcmdparser.add_dcmd_argument(&_classname);
944 }
945
946 void ClassHierarchyDCmd::execute(DCmdSource source, TRAPS) {
947 VM_PrintClassHierarchy printClassHierarchyOp(output(), _print_interfaces.value(),
948 _print_subclasses.value(), _classname.value());
949 VMThread::execute(&printClassHierarchyOp);
950 }
951
952 PrintClassLayoutDCmd::PrintClassLayoutDCmd(outputStream* output, bool heap) :
953 DCmdWithParser(output, heap),
954 _classname("classname", "Name of class whose layout should be printed. ",
955 "STRING", true) {
956 _dcmdparser.add_dcmd_argument(&_classname);
957 }
958
959 void PrintClassLayoutDCmd::execute(DCmdSource source, TRAPS) {
960 VM_PrintClassLayout printClassLayoutOp(output(), _classname.value());
961 VMThread::execute(&printClassLayoutOp);
962 }
963
964 int PrintClassLayoutDCmd::num_arguments() {
965 ResourceMark rm;
966 PrintClassLayoutDCmd* dcmd = new PrintClassLayoutDCmd(nullptr, false);
967 if (dcmd != nullptr) {
968 DCmdMark mark(dcmd);
969 return dcmd->_dcmdparser.num_arguments();
970 } else {
971 return 0;
972 }
973 }
974
975 #endif // INCLUDE_SERVICES
976
977 ClassesDCmd::ClassesDCmd(outputStream* output, bool heap) :
978 DCmdWithParser(output, heap),
979 _verbose("-verbose",
980 "Dump the detailed content of a Java class. "
981 "Some classes are annotated with flags: "
982 "F = has, or inherits, a non-empty finalize method, "
983 "f = has final method, "
984 "W = methods rewritten, "
985 "C = marked with @Contended annotation, "
986 "R = has been redefined, "
987 "S = is shared class",
988 "BOOLEAN", false, "false") {
989 _dcmdparser.add_dcmd_option(&_verbose);
990 }
991
992 class VM_PrintClasses : public VM_Operation {
993 private:
994 outputStream* _out;
995 bool _verbose;
996 public:
997 VM_PrintClasses(outputStream* out, bool verbose) : _out(out), _verbose(verbose) {}
998
999 virtual VMOp_Type type() const { return VMOp_PrintClasses; }
1000
1001 virtual void doit() {
1002 PrintClassClosure closure(_out, _verbose);
1003 ClassLoaderDataGraph::classes_do(&closure);
1004 }
1005 };
1006
1007 void ClassesDCmd::execute(DCmdSource source, TRAPS) {
1008 VM_PrintClasses vmop(output(), _verbose.value());
1009 VMThread::execute(&vmop);
1010 }
1011
1012 #if INCLUDE_CDS
1013 #define DEFAULT_CDS_ARCHIVE_FILENAME "java_pid%p_<subcmd>.jsa"
1014
1015 DumpSharedArchiveDCmd::DumpSharedArchiveDCmd(outputStream* output, bool heap) :
1016 DCmdWithParser(output, heap),
1017 _suboption("subcmd", "static_dump | dynamic_dump", "STRING", true),
1018 _filename("filename", "Name of shared archive to be dumped", "FILE", false,
1019 DEFAULT_CDS_ARCHIVE_FILENAME)
1020 {
1021 _dcmdparser.add_dcmd_argument(&_suboption);
1022 _dcmdparser.add_dcmd_argument(&_filename);
1023 }
1024
1025 void DumpSharedArchiveDCmd::execute(DCmdSource source, TRAPS) {
1026 jboolean is_static;
1027 const char* scmd = _suboption.value();
1028
1029 // The check for _filename.is_set() is because we don't want to use
1030 // DEFAULT_CDS_ARCHIVE_FILENAME, since it is meant as a description
1031 // of the default, not the actual default.
1032 const char* file = _filename.is_set() ? _filename.value() : nullptr;
1033
1034 if (strcmp(scmd, "static_dump") == 0) {
1035 is_static = JNI_TRUE;
1036 output()->print("Static dump: ");
1037 } else if (strcmp(scmd, "dynamic_dump") == 0) {
1038 is_static = JNI_FALSE;
1039 output()->print("Dynamic dump: ");
1040 if (!CDSConfig::is_using_archive()) {
1041 output()->print_cr("Dynamic dump is unsupported when base CDS archive is not loaded");
1042 return;
1043 }
1044 if (!RecordDynamicDumpInfo) {
1045 output()->print_cr("Dump dynamic should run with -XX:+RecordDynamicDumpInfo");
1046 return;
1047 }
1048 } else {
1049 output()->print_cr("Invalid command for VM.cds, valid input is static_dump or dynamic_dump");
1050 return;
1051 }
1052
1053 // call CDS.dumpSharedArchive
1054 Handle fileh;
1055 if (file != nullptr) {
1056 fileh = java_lang_String::create_from_str(file, CHECK);
1057 }
1058 Symbol* cds_name = vmSymbols::jdk_internal_misc_CDS();
1059 Klass* cds_klass = SystemDictionary::resolve_or_fail(cds_name, true /*throw error*/, CHECK);
1060 JavaValue result(T_OBJECT);
1061 JavaCallArguments args;
1062 args.push_int(is_static);
1063 args.push_oop(fileh);
1064 JavaCalls::call_static(&result,
1065 cds_klass,
1066 vmSymbols::dumpSharedArchive(),
1067 vmSymbols::dumpSharedArchive_signature(),
1068 &args, CHECK);
1069 if (!HAS_PENDING_EXCEPTION) {
1070 assert(result.get_type() == T_OBJECT, "Sanity check");
1071 // result contains the archive name
1072 char* archive_name = java_lang_String::as_utf8_string(result.get_oop());
1073 output()->print_cr("%s", archive_name);
1074 }
1075 }
1076 #endif // INCLUDE_CDS
1077
1078 ThreadDumpToFileDCmd::ThreadDumpToFileDCmd(outputStream* output, bool heap) :
1079 DCmdWithParser(output, heap),
1080 _overwrite("-overwrite", "May overwrite existing file", "BOOLEAN", false, "false"),
1081 _format("-format", "Output format (\"plain\" or \"json\")", "STRING", false, "plain"),
1082 _filepath("filepath", "The file path to the output file", "FILE", true) {
1083 _dcmdparser.add_dcmd_option(&_overwrite);
1084 _dcmdparser.add_dcmd_option(&_format);
1085 _dcmdparser.add_dcmd_argument(&_filepath);
1086 }
1087
1088 void ThreadDumpToFileDCmd::execute(DCmdSource source, TRAPS) {
1089 bool json = (_format.value() != nullptr) && (strcmp(_format.value(), "json") == 0);
1090 char* path = _filepath.value();
1091 bool overwrite = _overwrite.value();
1092 Symbol* name = (json) ? vmSymbols::dumpThreadsToJson_name() : vmSymbols::dumpThreads_name();
1093 dumpToFile(name, vmSymbols::string_bool_byte_array_signature(), path, overwrite, CHECK);
1094 }
1095
1096 void ThreadDumpToFileDCmd::dumpToFile(Symbol* name, Symbol* signature, const char* path, bool overwrite, TRAPS) {
1097 ResourceMark rm(THREAD);
1098 HandleMark hm(THREAD);
1099
1100 Handle h_path = java_lang_String::create_from_str(path, CHECK);
1101
1102 Symbol* sym = vmSymbols::jdk_internal_vm_ThreadDumper();
1103 Klass* k = SystemDictionary::resolve_or_fail(sym, true, CHECK);
1104
1105 // invoke the ThreadDump method to dump to file
1106 JavaValue result(T_OBJECT);
1107 JavaCallArguments args;
1108 args.push_oop(h_path);
1109 args.push_int(overwrite ? JNI_TRUE : JNI_FALSE);
1110 JavaCalls::call_static(&result,
1111 k,
1112 name,
1113 signature,
1114 &args,
1115 THREAD);
1116 if (HAS_PENDING_EXCEPTION) {
1117 java_lang_Throwable::print(PENDING_EXCEPTION, output());
1118 output()->cr();
1119 CLEAR_PENDING_EXCEPTION;
1120 return;
1121 }
1122
1123 // check that result is byte array
1124 oop res = cast_to_oop(result.get_jobject());
1125 assert(res->is_typeArray(), "just checking");
1126 assert(TypeArrayKlass::cast(res->klass())->element_type() == T_BYTE, "just checking");
1127
1128 // copy the bytes to the output stream
1129 typeArrayOop ba = typeArrayOop(res);
1130 jbyte* addr = typeArrayOop(res)->byte_at_addr(0);
1131 output()->print_raw((const char*)addr, ba->length());
1132 }
1133
1134 // Calls a static no-arg method on jdk.internal.vm.JcmdVThreadCommands that returns a byte[] with
1135 // the output. If the method completes successfully then the bytes are copied to the output stream.
1136 // If the method fails then the exception is printed to the output stream.
1137 static void execute_vthread_command(Symbol* method_name, outputStream* output, TRAPS) {
1138 ResourceMark rm(THREAD);
1139 HandleMark hm(THREAD);
1140
1141 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::jdk_internal_vm_JcmdVThreadCommands(), true, CHECK);
1142
1143 JavaValue result(T_OBJECT);
1144 JavaCallArguments args;
1145 JavaCalls::call_static(&result,
1146 k,
1147 method_name,
1148 vmSymbols::void_byte_array_signature(),
1149 &args,
1150 THREAD);
1151 if (HAS_PENDING_EXCEPTION) {
1152 java_lang_Throwable::print(PENDING_EXCEPTION, output);
1153 output->cr();
1154 CLEAR_PENDING_EXCEPTION;
1155 return;
1156 }
1157
1158 // copy the bytes to the output stream
1159 oop res = cast_to_oop(result.get_jobject());
1160 typeArrayOop ba = typeArrayOop(res);
1161 jbyte* addr = typeArrayOop(res)->byte_at_addr(0);
1162 output->print_raw((const char*)addr, ba->length());
1163 }
1164
1165 void VThreadSchedulerDCmd::execute(DCmdSource source, TRAPS) {
1166 execute_vthread_command(vmSymbols::printScheduler_name(), output(), CHECK);
1167 }
1168
1169 void VThreadPollersDCmd::execute(DCmdSource source, TRAPS) {
1170 execute_vthread_command(vmSymbols::printPollers_name(), output(), CHECK);
1171 }
1172
1173 CompilationMemoryStatisticDCmd::CompilationMemoryStatisticDCmd(outputStream* output, bool heap) :
1174 DCmdWithParser(output, heap),
1175 _verbose("verbose", "Print detailed information", "BOOLEAN", false, "false"),
1176 _legend("legend", "Table mode: print legend", "BOOLEAN", false, "false"),
1177 _minsize("minsize", "Minimum memory size", "MEMORY SIZE", false, "0") {
1178 _dcmdparser.add_dcmd_option(&_verbose);
1179 _dcmdparser.add_dcmd_option(&_minsize);
1180 _dcmdparser.add_dcmd_option(&_legend);
1181 }
1182
1183 void CompilationMemoryStatisticDCmd::execute(DCmdSource source, TRAPS) {
1184 const size_t minsize = _minsize.has_value() ? _minsize.value()._size : 0;
1185 CompilationMemoryStatistic::print_jcmd_report(output(), _verbose.value(), _legend.value(), minsize);
1186 }
1187
1188 #if defined(LINUX) || defined(_WIN64) || defined(__APPLE__)
1189
1190 SystemMapDCmd::SystemMapDCmd(outputStream* output, bool heap) : DCmd(output, heap) {}
1191
1192 void SystemMapDCmd::execute(DCmdSource source, TRAPS) {
1193 MemMapPrinter::print_all_mappings(output());
1194 }
1195
1196 static constexpr char default_filename[] = "vm_memory_map_%p.txt";
1197
1198 SystemDumpMapDCmd::SystemDumpMapDCmd(outputStream* output, bool heap) :
1199 DCmdWithParser(output, heap),
1200 _filename("-F", "file path", "FILE", false, default_filename) {
1201 _dcmdparser.add_dcmd_option(&_filename);
1202 }
1203
1204 void SystemDumpMapDCmd::execute(DCmdSource source, TRAPS) {
1205 const char* name = _filename.value();
1206 if (name == nullptr || name[0] == 0) {
1207 output()->print_cr("filename is empty or not specified. No file written");
1208 return;
1209 }
1210 fileStream fs(name);
1211 if (fs.is_open()) {
1212 if (!MemTracker::enabled()) {
1213 output()->print_cr("(NMT is disabled, will not annotate mappings).");
1214 }
1215 MemMapPrinter::print_all_mappings(&fs);
1216 // For the readers convenience, resolve path name.
1217 char tmp[JVM_MAXPATHLEN];
1218 const char* absname = os::realpath(name, tmp, sizeof(tmp));
1219 name = absname != nullptr ? absname : name;
1220 output()->print_cr("Memory map dumped to \"%s\".", name);
1221 } else {
1222 output()->print_cr("Failed to open \"%s\" for writing (%s).", name, os::strerror(errno));
1223 }
1224 }
1225
1226 #endif // LINUX