1 /*
2 * Copyright (c) 2011, 2024, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "cds/cdsConfig.hpp"
27 #include "cds/cds_globals.hpp"
28 #include "classfile/classLoaderDataGraph.hpp"
29 #include "classfile/classLoaderHierarchyDCmd.hpp"
30 #include "classfile/classLoaderStats.hpp"
31 #include "classfile/javaClasses.hpp"
32 #include "classfile/systemDictionary.hpp"
33 #include "classfile/vmClasses.hpp"
34 #include "code/codeCache.hpp"
35 #include "compiler/compilationMemoryStatistic.hpp"
36 #include "compiler/compiler_globals.hpp"
37 #include "compiler/compileBroker.hpp"
38 #include "compiler/directivesParser.hpp"
39 #include "gc/shared/gcVMOperations.hpp"
40 #include "jvm.h"
41 #include "memory/metaspace/metaspaceDCmd.hpp"
42 #include "memory/resourceArea.hpp"
43 #include "memory/universe.hpp"
44 #include "nmt/memMapPrinter.hpp"
45 #include "nmt/memTracker.hpp"
46 #include "nmt/nmtDCmd.hpp"
47 #include "oops/instanceKlass.hpp"
48 #include "oops/objArrayOop.inline.hpp"
49 #include "oops/oop.inline.hpp"
50 #include "oops/typeArrayOop.inline.hpp"
51 #include "prims/jvmtiAgentList.hpp"
52 #include "runtime/fieldDescriptor.inline.hpp"
53 #include "runtime/flags/jvmFlag.hpp"
54 #include "runtime/handles.inline.hpp"
55 #include "runtime/interfaceSupport.inline.hpp"
56 #include "runtime/javaCalls.hpp"
57 #include "runtime/jniHandles.hpp"
58 #include "runtime/os.hpp"
59 #include "runtime/vmOperations.hpp"
60 #include "runtime/vm_version.hpp"
61 #include "services/diagnosticArgument.hpp"
62 #include "services/diagnosticCommand.hpp"
63 #include "services/diagnosticFramework.hpp"
64 #include "services/heapDumper.hpp"
65 #include "services/management.hpp"
66 #include "services/writeableFlags.hpp"
67 #include "utilities/debug.hpp"
68 #include "utilities/events.hpp"
69 #include "utilities/formatBuffer.hpp"
70 #include "utilities/macros.hpp"
71 #include "utilities/parseInteger.hpp"
72 #ifdef LINUX
73 #include "os_posix.hpp"
74 #include "mallocInfoDcmd.hpp"
75 #include "trimCHeapDCmd.hpp"
76 #include <errno.h>
77 #endif
78
79 static void loadAgentModule(TRAPS) {
80 ResourceMark rm(THREAD);
81 HandleMark hm(THREAD);
82
83 JavaValue result(T_OBJECT);
84 Handle h_module_name = java_lang_String::create_from_str("jdk.management.agent", CHECK);
85 JavaCalls::call_static(&result,
86 vmClasses::module_Modules_klass(),
87 vmSymbols::loadModule_name(),
88 vmSymbols::loadModule_signature(),
89 h_module_name,
90 THREAD);
91 }
92
93 void DCmd::register_dcmds(){
94 // Registration of the diagnostic commands
95 // First argument specifies which interfaces will export the command
96 // Second argument specifies if the command is enabled
97 // Third argument specifies if the command is hidden
98 uint32_t full_export = DCmd_Source_Internal | DCmd_Source_AttachAPI
99 | DCmd_Source_MBean;
100 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<HelpDCmd>(full_export, true, false));
101 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VersionDCmd>(full_export, true, false));
102 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CommandLineDCmd>(full_export, true, false));
103 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<PrintSystemPropertiesDCmd>(full_export, true, false));
104 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<PrintVMFlagsDCmd>(full_export, true, false));
105 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SetVMFlagDCmd>(full_export, true, false));
106 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VMDynamicLibrariesDCmd>(full_export, true, false));
107 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VMUptimeDCmd>(full_export, true, false));
108 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VMInfoDCmd>(full_export, true, false));
109 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SystemGCDCmd>(full_export, true, false));
110 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<RunFinalizationDCmd>(full_export, true, false));
111 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<HeapInfoDCmd>(full_export, true, false));
112 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<FinalizerInfoDCmd>(full_export, true, false));
113 #if INCLUDE_SERVICES
114 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<HeapDumpDCmd>(DCmd_Source_Internal | DCmd_Source_AttachAPI, true, false));
115 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassHistogramDCmd>(full_export, true, false));
116 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SystemDictionaryDCmd>(full_export, true, false));
117 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassHierarchyDCmd>(full_export, true, false));
118 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassesDCmd>(full_export, true, false));
119 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SymboltableDCmd>(full_export, true, false));
120 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<StringtableDCmd>(full_export, true, false));
121 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<metaspace::MetaspaceDCmd>(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<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<CompilerDirectivesRemoveDCmd>(full_export, true, false));
149 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesClearDCmd>(full_export, true, false));
150 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilationMemoryStatisticDCmd>(full_export, true, false));
151
152 // Enhanced JMX Agent Support
153 // These commands won't be exported via the DiagnosticCommandMBean until an
154 // appropriate permission is created for them
155 uint32_t jmx_agent_export_flags = DCmd_Source_Internal | DCmd_Source_AttachAPI;
156 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStartRemoteDCmd>(jmx_agent_export_flags, true,false));
157 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStartLocalDCmd>(jmx_agent_export_flags, true,false));
158 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStopRemoteDCmd>(jmx_agent_export_flags, true,false));
159 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStatusDCmd>(jmx_agent_export_flags, true,false));
160
161 // Debug on cmd (only makes sense with JVMTI since the agentlib needs it).
162 #if INCLUDE_JVMTI
163 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<DebugOnCmdStartDCmd>(full_export, true, true));
164 #endif // INCLUDE_JVMTI
165
166 #if INCLUDE_CDS
167 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<DumpSharedArchiveDCmd>(full_export, true, false));
168 #endif // INCLUDE_CDS
169
170 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<NMTDCmd>(full_export, true, false));
171 }
172
173 HelpDCmd::HelpDCmd(outputStream* output, bool heap) : DCmdWithParser(output, heap),
174 _all("-all", "Show help for all commands", "BOOLEAN", false, "false"),
175 _cmd("command name", "The name of the command for which we want help",
176 "STRING", false) {
177 _dcmdparser.add_dcmd_option(&_all);
178 _dcmdparser.add_dcmd_argument(&_cmd);
179 };
180
181
182 static int compare_strings(const char** s1, const char** s2) {
183 return ::strcmp(*s1, *s2);
184 }
185
186 void HelpDCmd::execute(DCmdSource source, TRAPS) {
187 if (_all.value()) {
188 GrowableArray<const char*>* cmd_list = DCmdFactory::DCmd_list(source);
189 cmd_list->sort(compare_strings);
190 for (int i = 0; i < cmd_list->length(); i++) {
191 DCmdFactory* factory = DCmdFactory::factory(source, cmd_list->at(i),
192 strlen(cmd_list->at(i)));
193 output()->print_cr("%s%s", factory->name(),
194 factory->is_enabled() ? "" : " [disabled]");
195 output()->print_cr("\t%s", factory->description());
196 output()->cr();
197 factory = factory->next();
198 }
199 } else if (_cmd.has_value()) {
200 DCmd* cmd = nullptr;
201 DCmdFactory* factory = DCmdFactory::factory(source, _cmd.value(),
202 strlen(_cmd.value()));
203 if (factory != nullptr) {
204 output()->print_cr("%s%s", factory->name(),
205 factory->is_enabled() ? "" : " [disabled]");
206 output()->print_cr("%s", factory->description());
207 output()->print_cr("\nImpact: %s", factory->impact());
208 output()->cr();
209 cmd = factory->create_resource_instance(output());
210 if (cmd != nullptr) {
211 DCmdMark mark(cmd);
212 cmd->print_help(factory->name());
213 }
214 } else {
215 output()->print_cr("Help unavailable : '%s' : No such command", _cmd.value());
216 }
217 } else {
218 output()->print_cr("The following commands are available:");
219 GrowableArray<const char *>* cmd_list = DCmdFactory::DCmd_list(source);
220 cmd_list->sort(compare_strings);
221 for (int i = 0; i < cmd_list->length(); i++) {
222 DCmdFactory* factory = DCmdFactory::factory(source, cmd_list->at(i),
223 strlen(cmd_list->at(i)));
224 output()->print_cr("%s%s", factory->name(),
225 factory->is_enabled() ? "" : " [disabled]");
226 factory = factory->_next;
227 }
228 output()->print_cr("\nFor more information about a specific command use 'help <command>'.");
229 }
230 }
231
232 void VersionDCmd::execute(DCmdSource source, TRAPS) {
233 output()->print_cr("%s version %s", VM_Version::vm_name(),
234 VM_Version::vm_release());
235 JDK_Version jdk_version = JDK_Version::current();
236 if (jdk_version.patch_version() > 0) {
237 output()->print_cr("JDK %d.%d.%d.%d", jdk_version.major_version(),
238 jdk_version.minor_version(), jdk_version.security_version(),
239 jdk_version.patch_version());
240 } else {
241 output()->print_cr("JDK %d.%d.%d", jdk_version.major_version(),
242 jdk_version.minor_version(), jdk_version.security_version());
243 }
244 }
245
246 PrintVMFlagsDCmd::PrintVMFlagsDCmd(outputStream* output, bool heap) :
247 DCmdWithParser(output, heap),
248 _all("-all", "Print all flags supported by the VM", "BOOLEAN", false, "false") {
249 _dcmdparser.add_dcmd_option(&_all);
250 }
251
252 void PrintVMFlagsDCmd::execute(DCmdSource source, TRAPS) {
253 if (_all.value()) {
254 JVMFlag::printFlags(output(), true);
255 } else {
256 JVMFlag::printSetFlags(output());
257 }
258 }
259
260 SetVMFlagDCmd::SetVMFlagDCmd(outputStream* output, bool heap) :
261 DCmdWithParser(output, heap),
262 _flag("flag name", "The name of the flag we want to set",
263 "STRING", true),
264 _value("string value", "The value we want to set", "STRING", false) {
265 _dcmdparser.add_dcmd_argument(&_flag);
266 _dcmdparser.add_dcmd_argument(&_value);
267 }
268
269 void SetVMFlagDCmd::execute(DCmdSource source, TRAPS) {
270 const char* val = nullptr;
271 if (_value.value() != nullptr) {
272 val = _value.value();
273 }
274
275 FormatBuffer<80> err_msg("%s", "");
276 int ret = WriteableFlags::set_flag(_flag.value(), val, JVMFlagOrigin::MANAGEMENT, err_msg);
277
278 if (ret != JVMFlag::SUCCESS) {
279 output()->print_cr("%s", err_msg.buffer());
280 }
281 }
282
283 void JVMTIDataDumpDCmd::execute(DCmdSource source, TRAPS) {
284 if (JvmtiExport::should_post_data_dump()) {
285 JvmtiExport::post_data_dump();
286 }
287 }
288
289 #if INCLUDE_SERVICES
290 #if INCLUDE_JVMTI
291 JVMTIAgentLoadDCmd::JVMTIAgentLoadDCmd(outputStream* output, bool heap) :
292 DCmdWithParser(output, heap),
293 _libpath("library path", "Absolute path of the JVMTI agent to load.",
294 "STRING", true),
295 _option("agent option", "Option string to pass the agent.", "STRING", false) {
296 _dcmdparser.add_dcmd_argument(&_libpath);
297 _dcmdparser.add_dcmd_argument(&_option);
298 }
299
300 void JVMTIAgentLoadDCmd::execute(DCmdSource source, TRAPS) {
301
302 if (_libpath.value() == nullptr) {
303 output()->print_cr("JVMTI.agent_load dcmd needs library path.");
304 return;
305 }
306
307 char *suffix = strrchr(_libpath.value(), '.');
308 bool is_java_agent = (suffix != nullptr) && (strncmp(".jar", suffix, 4) == 0);
309
310 if (is_java_agent) {
311 if (_option.value() == nullptr) {
312 JvmtiAgentList::load_agent("instrument", false, _libpath.value(), output());
313 } else {
314 size_t opt_len = strlen(_libpath.value()) + strlen(_option.value()) + 2;
315 if (opt_len > 4096) {
316 output()->print_cr("JVMTI agent attach failed: Options is too long.");
317 return;
318 }
319
320 char *opt = (char *)os::malloc(opt_len, mtInternal);
321 if (opt == nullptr) {
322 output()->print_cr("JVMTI agent attach failed: "
323 "Could not allocate " SIZE_FORMAT " bytes for argument.",
324 opt_len);
325 return;
326 }
327
328 jio_snprintf(opt, opt_len, "%s=%s", _libpath.value(), _option.value());
329 JvmtiAgentList::load_agent("instrument", false, opt, output());
330
331 os::free(opt);
332 }
333 } else {
334 JvmtiAgentList::load_agent(_libpath.value(), true, _option.value(), output());
335 }
336 }
337
338 #endif // INCLUDE_JVMTI
339 #endif // INCLUDE_SERVICES
340
341 void PrintSystemPropertiesDCmd::execute(DCmdSource source, TRAPS) {
342 // load VMSupport
343 Symbol* klass = vmSymbols::jdk_internal_vm_VMSupport();
344 Klass* k = SystemDictionary::resolve_or_fail(klass, true, CHECK);
345 InstanceKlass* ik = InstanceKlass::cast(k);
346 if (ik->should_be_initialized()) {
347 ik->initialize(THREAD);
348 }
349 if (HAS_PENDING_EXCEPTION) {
350 java_lang_Throwable::print(PENDING_EXCEPTION, output());
351 output()->cr();
352 CLEAR_PENDING_EXCEPTION;
353 return;
354 }
355
356 // invoke the serializePropertiesToByteArray method
357 JavaValue result(T_OBJECT);
358 JavaCallArguments args;
359
360 Symbol* signature = vmSymbols::void_byte_array_signature();
361 JavaCalls::call_static(&result,
362 ik,
363 vmSymbols::serializePropertiesToByteArray_name(),
364 signature,
365 &args,
366 THREAD);
367 if (HAS_PENDING_EXCEPTION) {
368 java_lang_Throwable::print(PENDING_EXCEPTION, output());
369 output()->cr();
370 CLEAR_PENDING_EXCEPTION;
371 return;
372 }
373
374 // The result should be a [B
375 oop res = result.get_oop();
376 assert(res->is_typeArray(), "just checking");
377 assert(TypeArrayKlass::cast(res->klass())->element_type() == T_BYTE, "just checking");
378
379 // copy the bytes to the output stream
380 typeArrayOop ba = typeArrayOop(res);
381 jbyte* addr = typeArrayOop(res)->byte_at_addr(0);
382 output()->print_raw((const char*)addr, ba->length());
383 }
384
385 VMUptimeDCmd::VMUptimeDCmd(outputStream* output, bool heap) :
386 DCmdWithParser(output, heap),
387 _date("-date", "Add a prefix with current date", "BOOLEAN", false, "false") {
388 _dcmdparser.add_dcmd_option(&_date);
389 }
390
391 void VMUptimeDCmd::execute(DCmdSource source, TRAPS) {
392 if (_date.value()) {
393 output()->date_stamp(true, "", ": ");
394 }
395 output()->time_stamp().update_to(tty->time_stamp().ticks());
396 output()->stamp();
397 output()->print_cr(" s");
398 }
399
400 void VMInfoDCmd::execute(DCmdSource source, TRAPS) {
401 VMError::print_vm_info(_output);
402 }
403
404 void SystemGCDCmd::execute(DCmdSource source, TRAPS) {
405 Universe::heap()->collect(GCCause::_dcmd_gc_run);
406 }
407
408 void RunFinalizationDCmd::execute(DCmdSource source, TRAPS) {
409 Klass* k = vmClasses::System_klass();
410 JavaValue result(T_VOID);
411 JavaCalls::call_static(&result, k,
412 vmSymbols::run_finalization_name(),
413 vmSymbols::void_method_signature(), CHECK);
414 }
415
416 void HeapInfoDCmd::execute(DCmdSource source, TRAPS) {
417 MutexLocker hl(THREAD, Heap_lock);
418 Universe::heap()->print_on(output());
419 }
420
421 void FinalizerInfoDCmd::execute(DCmdSource source, TRAPS) {
422 ResourceMark rm(THREAD);
423
424 if (!InstanceKlass::is_finalization_enabled()) {
425 output()->print_cr("Finalization is disabled");
426 return;
427 }
428
429 Klass* k = SystemDictionary::resolve_or_fail(
430 vmSymbols::finalizer_histogram_klass(), true, CHECK);
431
432 JavaValue result(T_ARRAY);
433
434 // We are calling lang.ref.FinalizerHistogram.getFinalizerHistogram() method
435 // and expect it to return array of FinalizerHistogramEntry as Object[]
436
437 JavaCalls::call_static(&result, k,
438 vmSymbols::get_finalizer_histogram_name(),
439 vmSymbols::void_finalizer_histogram_entry_array_signature(), CHECK);
440
441 objArrayOop result_oop = (objArrayOop) result.get_oop();
442 if (result_oop->length() == 0) {
443 output()->print_cr("No instances waiting for finalization found");
444 return;
445 }
446
447 oop foop = result_oop->obj_at(0);
448 InstanceKlass* ik = InstanceKlass::cast(foop->klass());
449
450 fieldDescriptor count_fd, name_fd;
451
452 Klass* count_res = ik->find_field(
453 vmSymbols::finalizer_histogram_entry_count_field(), vmSymbols::int_signature(), &count_fd);
454
455 Klass* name_res = ik->find_field(
456 vmSymbols::finalizer_histogram_entry_name_field(), vmSymbols::string_signature(), &name_fd);
457
458 assert(count_res != nullptr && name_res != nullptr, "Unexpected layout of FinalizerHistogramEntry");
459
460 output()->print_cr("Unreachable instances waiting for finalization");
461 output()->print_cr("#instances class name");
462 output()->print_cr("-----------------------");
463
464 for (int i = 0; i < result_oop->length(); ++i) {
465 oop element_oop = result_oop->obj_at(i);
466 oop str_oop = element_oop->obj_field(name_fd.offset());
467 char *name = java_lang_String::as_utf8_string(str_oop);
468 int count = element_oop->int_field(count_fd.offset());
469 output()->print_cr("%10d %s", count, name);
470 }
471 }
472
473 #if INCLUDE_SERVICES // Heap dumping/inspection supported
474 HeapDumpDCmd::HeapDumpDCmd(outputStream* output, bool heap) :
475 DCmdWithParser(output, heap),
476 _filename("filename","Name of the dump file", "STRING",true),
477 _all("-all", "Dump all objects, including unreachable objects",
478 "BOOLEAN", false, "false"),
479 _gzip("-gz", "If specified, the heap dump is written in gzipped format "
480 "using the given compression level. 1 (recommended) is the fastest, "
481 "9 the strongest compression.", "INT", false, "1"),
482 _overwrite("-overwrite", "If specified, the dump file will be overwritten if it exists",
483 "BOOLEAN", false, "false"),
484 _parallel("-parallel", "Number of parallel threads to use for heap dump. The VM "
485 "will try to use the specified number of threads, but might use fewer.",
486 "INT", false, "1") {
487 _dcmdparser.add_dcmd_option(&_all);
488 _dcmdparser.add_dcmd_argument(&_filename);
489 _dcmdparser.add_dcmd_option(&_gzip);
490 _dcmdparser.add_dcmd_option(&_overwrite);
491 _dcmdparser.add_dcmd_option(&_parallel);
492 }
493
494 void HeapDumpDCmd::execute(DCmdSource source, TRAPS) {
495 jlong level = -1; // -1 means no compression.
496 jlong parallel = HeapDumper::default_num_of_dump_threads();
497
498 if (_gzip.is_set()) {
499 level = _gzip.value();
500
501 if (level < 1 || level > 9) {
502 output()->print_cr("Compression level out of range (1-9): " JLONG_FORMAT, level);
503 return;
504 }
505 }
506
507 if (_parallel.is_set()) {
508 parallel = _parallel.value();
509
510 if (parallel < 0) {
511 output()->print_cr("Invalid number of parallel dump threads.");
512 return;
513 } else if (parallel == 0) {
514 // 0 implies to disable parallel heap dump, in such case, we use serial dump instead
515 parallel = 1;
516 }
517 }
518
519 // Request a full GC before heap dump if _all is false
520 // This helps reduces the amount of unreachable objects in the dump
521 // and makes it easier to browse.
522 HeapDumper dumper(!_all.value() /* request GC if _all is false*/);
523 dumper.dump(_filename.value(), output(), (int) level, _overwrite.value(), (uint)parallel);
524 }
525
526 ClassHistogramDCmd::ClassHistogramDCmd(outputStream* output, bool heap) :
527 DCmdWithParser(output, heap),
528 _all("-all", "Inspect all objects, including unreachable objects",
529 "BOOLEAN", false, "false"),
530 _parallel_thread_num("-parallel",
531 "Number of parallel threads to use for heap inspection. "
532 "0 (the default) means let the VM determine the number of threads to use. "
533 "1 means use one thread (disable parallelism). "
534 "For any other value the VM will try to use the specified number of "
535 "threads, but might use fewer.",
536 "INT", false, "0") {
537 _dcmdparser.add_dcmd_option(&_all);
538 _dcmdparser.add_dcmd_option(&_parallel_thread_num);
539 }
540
541 void ClassHistogramDCmd::execute(DCmdSource source, TRAPS) {
542 jlong num = _parallel_thread_num.value();
543 if (num < 0) {
544 output()->print_cr("Parallel thread number out of range (>=0): " JLONG_FORMAT, num);
545 return;
546 }
547 uint parallel_thread_num = num == 0
548 ? MAX2<uint>(1, (uint)os::initial_active_processor_count() * 3 / 8)
549 : num;
550 VM_GC_HeapInspection heapop(output(),
551 !_all.value(), /* request full gc if false */
552 parallel_thread_num);
553 VMThread::execute(&heapop);
554 }
555
556 #endif // INCLUDE_SERVICES
557
558 ThreadDumpDCmd::ThreadDumpDCmd(outputStream* output, bool heap) :
559 DCmdWithParser(output, heap),
560 _locks("-l", "print java.util.concurrent locks", "BOOLEAN", false, "false"),
561 _extended("-e", "print extended thread information", "BOOLEAN", false, "false") {
562 _dcmdparser.add_dcmd_option(&_locks);
563 _dcmdparser.add_dcmd_option(&_extended);
564 }
565
566 void ThreadDumpDCmd::execute(DCmdSource source, TRAPS) {
567 // thread stacks and JNI global handles
568 VM_PrintThreads op1(output(), _locks.value(), _extended.value(), true /* print JNI handle info */);
569 VMThread::execute(&op1);
570
571 // Deadlock detection
572 VM_FindDeadlocks op2(output());
573 VMThread::execute(&op2);
574 }
575
576 // Enhanced JMX Agent support
577
578 JMXStartRemoteDCmd::JMXStartRemoteDCmd(outputStream *output, bool heap_allocated) :
579
580 DCmdWithParser(output, heap_allocated),
581
582 _config_file
583 ("config.file",
584 "set com.sun.management.config.file", "STRING", false),
585
586 _jmxremote_host
587 ("jmxremote.host",
588 "set com.sun.management.jmxremote.host", "STRING", false),
589
590 _jmxremote_port
591 ("jmxremote.port",
592 "set com.sun.management.jmxremote.port", "STRING", false),
593
594 _jmxremote_rmi_port
595 ("jmxremote.rmi.port",
596 "set com.sun.management.jmxremote.rmi.port", "STRING", false),
597
598 _jmxremote_ssl
599 ("jmxremote.ssl",
600 "set com.sun.management.jmxremote.ssl", "STRING", false),
601
602 _jmxremote_registry_ssl
603 ("jmxremote.registry.ssl",
604 "set com.sun.management.jmxremote.registry.ssl", "STRING", false),
605
606 _jmxremote_authenticate
607 ("jmxremote.authenticate",
608 "set com.sun.management.jmxremote.authenticate", "STRING", false),
609
610 _jmxremote_password_file
611 ("jmxremote.password.file",
612 "set com.sun.management.jmxremote.password.file", "STRING", false),
613
614 _jmxremote_access_file
615 ("jmxremote.access.file",
616 "set com.sun.management.jmxremote.access.file", "STRING", false),
617
618 _jmxremote_login_config
619 ("jmxremote.login.config",
620 "set com.sun.management.jmxremote.login.config", "STRING", false),
621
622 _jmxremote_ssl_enabled_cipher_suites
623 ("jmxremote.ssl.enabled.cipher.suites",
624 "set com.sun.management.jmxremote.ssl.enabled.cipher.suite", "STRING", false),
625
626 _jmxremote_ssl_enabled_protocols
627 ("jmxremote.ssl.enabled.protocols",
628 "set com.sun.management.jmxremote.ssl.enabled.protocols", "STRING", false),
629
630 _jmxremote_ssl_need_client_auth
631 ("jmxremote.ssl.need.client.auth",
632 "set com.sun.management.jmxremote.need.client.auth", "STRING", false),
633
634 _jmxremote_ssl_config_file
635 ("jmxremote.ssl.config.file",
636 "set com.sun.management.jmxremote.ssl.config.file", "STRING", false),
637
638 // JDP Protocol support
639 _jmxremote_autodiscovery
640 ("jmxremote.autodiscovery",
641 "set com.sun.management.jmxremote.autodiscovery", "STRING", false),
642
643 _jdp_port
644 ("jdp.port",
645 "set com.sun.management.jdp.port", "INT", false),
646
647 _jdp_address
648 ("jdp.address",
649 "set com.sun.management.jdp.address", "STRING", false),
650
651 _jdp_source_addr
652 ("jdp.source_addr",
653 "set com.sun.management.jdp.source_addr", "STRING", false),
654
655 _jdp_ttl
656 ("jdp.ttl",
657 "set com.sun.management.jdp.ttl", "INT", false),
658
659 _jdp_pause
660 ("jdp.pause",
661 "set com.sun.management.jdp.pause", "INT", false),
662
663 _jdp_name
664 ("jdp.name",
665 "set com.sun.management.jdp.name", "STRING", false)
666
667 {
668 _dcmdparser.add_dcmd_option(&_config_file);
669 _dcmdparser.add_dcmd_option(&_jmxremote_host);
670 _dcmdparser.add_dcmd_option(&_jmxremote_port);
671 _dcmdparser.add_dcmd_option(&_jmxremote_rmi_port);
672 _dcmdparser.add_dcmd_option(&_jmxremote_ssl);
673 _dcmdparser.add_dcmd_option(&_jmxremote_registry_ssl);
674 _dcmdparser.add_dcmd_option(&_jmxremote_authenticate);
675 _dcmdparser.add_dcmd_option(&_jmxremote_password_file);
676 _dcmdparser.add_dcmd_option(&_jmxremote_access_file);
677 _dcmdparser.add_dcmd_option(&_jmxremote_login_config);
678 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_enabled_cipher_suites);
679 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_enabled_protocols);
680 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_need_client_auth);
681 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_config_file);
682 _dcmdparser.add_dcmd_option(&_jmxremote_autodiscovery);
683 _dcmdparser.add_dcmd_option(&_jdp_port);
684 _dcmdparser.add_dcmd_option(&_jdp_address);
685 _dcmdparser.add_dcmd_option(&_jdp_source_addr);
686 _dcmdparser.add_dcmd_option(&_jdp_ttl);
687 _dcmdparser.add_dcmd_option(&_jdp_pause);
688 _dcmdparser.add_dcmd_option(&_jdp_name);
689 }
690
691 void JMXStartRemoteDCmd::execute(DCmdSource source, TRAPS) {
692 ResourceMark rm(THREAD);
693 HandleMark hm(THREAD);
694
695 // Load and initialize the jdk.internal.agent.Agent class
696 // invoke startRemoteManagementAgent(string) method to start
697 // the remote management server.
698 // throw java.lang.NoSuchMethodError if the method doesn't exist
699
700 loadAgentModule(CHECK);
701 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
702 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::jdk_internal_agent_Agent(), loader, Handle(), true, CHECK);
703
704 JavaValue result(T_VOID);
705
706 // Pass all command line arguments to java as key=value,...
707 // All checks are done on java side
708
709 int len = 0;
710 stringStream options;
711 char comma[2] = {0,0};
712
713 // Leave default values on Agent.class side and pass only
714 // arguments explicitly set by user. All arguments passed
715 // to jcmd override properties with the same name set by
716 // command line with -D or by managmenent.properties
717 // file.
718 #define PUT_OPTION(a) \
719 do { \
720 if ( (a).is_set() ){ \
721 if ( *((a).type()) == 'I' ) { \
722 options.print("%scom.sun.management.%s=" JLONG_FORMAT, comma, (a).name(), (jlong)((a).value())); \
723 } else { \
724 options.print("%scom.sun.management.%s=%s", comma, (a).name(), (char*)((a).value())); \
725 } \
726 comma[0] = ','; \
727 }\
728 } while(0);
729
730
731 PUT_OPTION(_config_file);
732 PUT_OPTION(_jmxremote_host);
733 PUT_OPTION(_jmxremote_port);
734 PUT_OPTION(_jmxremote_rmi_port);
735 PUT_OPTION(_jmxremote_ssl);
736 PUT_OPTION(_jmxremote_registry_ssl);
737 PUT_OPTION(_jmxremote_authenticate);
738 PUT_OPTION(_jmxremote_password_file);
739 PUT_OPTION(_jmxremote_access_file);
740 PUT_OPTION(_jmxremote_login_config);
741 PUT_OPTION(_jmxremote_ssl_enabled_cipher_suites);
742 PUT_OPTION(_jmxremote_ssl_enabled_protocols);
743 PUT_OPTION(_jmxremote_ssl_need_client_auth);
744 PUT_OPTION(_jmxremote_ssl_config_file);
745 PUT_OPTION(_jmxremote_autodiscovery);
746 PUT_OPTION(_jdp_port);
747 PUT_OPTION(_jdp_address);
748 PUT_OPTION(_jdp_source_addr);
749 PUT_OPTION(_jdp_ttl);
750 PUT_OPTION(_jdp_pause);
751 PUT_OPTION(_jdp_name);
752
753 #undef PUT_OPTION
754
755 Handle str = java_lang_String::create_from_str(options.as_string(), CHECK);
756 JavaCalls::call_static(&result, k, vmSymbols::startRemoteAgent_name(), vmSymbols::string_void_signature(), str, CHECK);
757 }
758
759 JMXStartLocalDCmd::JMXStartLocalDCmd(outputStream *output, bool heap_allocated) :
760 DCmd(output, heap_allocated) {
761 // do nothing
762 }
763
764 void JMXStartLocalDCmd::execute(DCmdSource source, TRAPS) {
765 ResourceMark rm(THREAD);
766 HandleMark hm(THREAD);
767
768 // Load and initialize the jdk.internal.agent.Agent class
769 // invoke startLocalManagementAgent(void) method to start
770 // the local management server
771 // throw java.lang.NoSuchMethodError if method doesn't exist
772
773 loadAgentModule(CHECK);
774 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
775 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::jdk_internal_agent_Agent(), loader, Handle(), true, CHECK);
776
777 JavaValue result(T_VOID);
778 JavaCalls::call_static(&result, k, vmSymbols::startLocalAgent_name(), vmSymbols::void_method_signature(), CHECK);
779 }
780
781 void JMXStopRemoteDCmd::execute(DCmdSource source, TRAPS) {
782 ResourceMark rm(THREAD);
783 HandleMark hm(THREAD);
784
785 // Load and initialize the jdk.internal.agent.Agent class
786 // invoke stopRemoteManagementAgent method to stop the
787 // management server
788 // throw java.lang.NoSuchMethodError if method doesn't exist
789
790 loadAgentModule(CHECK);
791 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
792 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::jdk_internal_agent_Agent(), loader, Handle(), true, CHECK);
793
794 JavaValue result(T_VOID);
795 JavaCalls::call_static(&result, k, vmSymbols::stopRemoteAgent_name(), vmSymbols::void_method_signature(), CHECK);
796 }
797
798 JMXStatusDCmd::JMXStatusDCmd(outputStream *output, bool heap_allocated) :
799 DCmd(output, heap_allocated) {
800 // do nothing
801 }
802
803 void JMXStatusDCmd::execute(DCmdSource source, TRAPS) {
804 ResourceMark rm(THREAD);
805 HandleMark hm(THREAD);
806
807 // Load and initialize the jdk.internal.agent.Agent class
808 // invoke getManagementAgentStatus() method to generate the status info
809 // throw java.lang.NoSuchMethodError if method doesn't exist
810
811 loadAgentModule(CHECK);
812 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
813 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::jdk_internal_agent_Agent(), loader, Handle(), true, CHECK);
814
815 JavaValue result(T_OBJECT);
816 JavaCalls::call_static(&result, k, vmSymbols::getAgentStatus_name(), vmSymbols::void_string_signature(), CHECK);
817
818 jvalue* jv = (jvalue*) result.get_value_addr();
819 oop str = cast_to_oop(jv->l);
820 if (str != nullptr) {
821 char* out = java_lang_String::as_utf8_string(str);
822 if (out) {
823 // Avoid using print_cr() because length maybe longer than O_BUFLEN
824 output()->print_raw_cr(out);
825 return;
826 }
827 }
828 output()->print_cr("Error obtaining management agent status");
829 }
830
831 VMDynamicLibrariesDCmd::VMDynamicLibrariesDCmd(outputStream *output, bool heap_allocated) :
832 DCmd(output, heap_allocated) {
833 // do nothing
834 }
835
836 void VMDynamicLibrariesDCmd::execute(DCmdSource source, TRAPS) {
837 os::print_dll_info(output());
838 output()->cr();
839 }
840
841 void CompileQueueDCmd::execute(DCmdSource source, TRAPS) {
842 VM_PrintCompileQueue printCompileQueueOp(output());
843 VMThread::execute(&printCompileQueueOp);
844 }
845
846 void CodeListDCmd::execute(DCmdSource source, TRAPS) {
847 CodeCache::print_codelist(output());
848 }
849
850 void CodeCacheDCmd::execute(DCmdSource source, TRAPS) {
851 CodeCache::print_layout(output());
852 }
853
854 #ifdef LINUX
855 #define DEFAULT_PERFMAP_FILENAME "/tmp/perf-<pid>.map"
856
857 PerfMapDCmd::PerfMapDCmd(outputStream* output, bool heap) :
858 DCmdWithParser(output, heap),
859 _filename("filename", "Name of the map file", "STRING", false, DEFAULT_PERFMAP_FILENAME)
860 {
861 _dcmdparser.add_dcmd_argument(&_filename);
862 }
863
864 void PerfMapDCmd::execute(DCmdSource source, TRAPS) {
865 // The check for _filename.is_set() is because we don't want to use
866 // DEFAULT_PERFMAP_FILENAME, since it is meant as a description
867 // of the default, not the actual default.
868 CodeCache::write_perf_map(_filename.is_set() ? _filename.value() : nullptr, output());
869 }
870 #endif // LINUX
871
872 //---< BEGIN >--- CodeHeap State Analytics.
873 CodeHeapAnalyticsDCmd::CodeHeapAnalyticsDCmd(outputStream* output, bool heap) :
874 DCmdWithParser(output, heap),
875 _function("function", "Function to be performed (aggregate, UsedSpace, FreeSpace, MethodCount, MethodSpace, MethodAge, MethodNames, discard", "STRING", false, "all"),
876 _granularity("granularity", "Detail level - smaller value -> more detail", "INT", false, "4096") {
877 _dcmdparser.add_dcmd_argument(&_function);
878 _dcmdparser.add_dcmd_argument(&_granularity);
879 }
880
881 void CodeHeapAnalyticsDCmd::execute(DCmdSource source, TRAPS) {
882 jlong granularity = _granularity.value();
883 if (granularity < 1) {
884 Exceptions::fthrow(THREAD_AND_LOCATION, vmSymbols::java_lang_IllegalArgumentException(),
885 "Invalid granularity value " JLONG_FORMAT ". Should be positive.\n", granularity);
886 return;
887 }
888
889 CompileBroker::print_heapinfo(output(), _function.value(), granularity);
890 }
891 //---< END >--- CodeHeap State Analytics.
892
893 EventLogDCmd::EventLogDCmd(outputStream* output, bool heap) :
894 DCmdWithParser(output, heap),
895 _log("log", "Name of log to be printed. If omitted, all logs are printed.", "STRING", false, nullptr),
896 _max("max", "Maximum number of events to be printed (newest first). If omitted, all events are printed.", "STRING", false, nullptr)
897 {
898 _dcmdparser.add_dcmd_option(&_log);
899 _dcmdparser.add_dcmd_option(&_max);
900 }
901
902 void EventLogDCmd::execute(DCmdSource source, TRAPS) {
903 const char* max_value = _max.value();
904 int max = -1;
905 if (max_value != nullptr) {
906 char* endptr = nullptr;
907 int max;
908 if (!parse_integer(max_value, &max)) {
909 output()->print_cr("Invalid max option: \"%s\".", max_value);
910 return;
911 }
912 }
913 const char* log_name = _log.value();
914 if (log_name != nullptr) {
915 Events::print_one(output(), log_name, max);
916 } else {
917 Events::print_all(output(), max);
918 }
919 }
920
921 void CompilerDirectivesPrintDCmd::execute(DCmdSource source, TRAPS) {
922 DirectivesStack::print(output());
923 }
924
925 CompilerDirectivesAddDCmd::CompilerDirectivesAddDCmd(outputStream* output, bool heap) :
926 DCmdWithParser(output, heap),
927 _filename("filename","Name of the directives file", "STRING",true) {
928 _dcmdparser.add_dcmd_argument(&_filename);
929 }
930
931 void CompilerDirectivesAddDCmd::execute(DCmdSource source, TRAPS) {
932 DirectivesParser::parse_from_file(_filename.value(), output(), true);
933 }
934
935 void CompilerDirectivesRemoveDCmd::execute(DCmdSource source, TRAPS) {
936 DirectivesStack::pop(1);
937 }
938
939 void CompilerDirectivesClearDCmd::execute(DCmdSource source, TRAPS) {
940 DirectivesStack::clear();
941 }
942 #if INCLUDE_SERVICES
943 ClassHierarchyDCmd::ClassHierarchyDCmd(outputStream* output, bool heap) :
944 DCmdWithParser(output, heap),
945 _print_interfaces("-i", "Inherited interfaces should be printed.", "BOOLEAN", false, "false"),
946 _print_subclasses("-s", "If a classname is specified, print its subclasses "
947 "in addition to its superclasses. Without this option only the "
948 "superclasses will be printed.", "BOOLEAN", false, "false"),
949 _classname("classname", "Name of class whose hierarchy should be printed. "
950 "If not specified, all class hierarchies are printed.",
951 "STRING", false) {
952 _dcmdparser.add_dcmd_option(&_print_interfaces);
953 _dcmdparser.add_dcmd_option(&_print_subclasses);
954 _dcmdparser.add_dcmd_argument(&_classname);
955 }
956
957 void ClassHierarchyDCmd::execute(DCmdSource source, TRAPS) {
958 VM_PrintClassHierarchy printClassHierarchyOp(output(), _print_interfaces.value(),
959 _print_subclasses.value(), _classname.value());
960 VMThread::execute(&printClassHierarchyOp);
961 }
962 #endif
963
964 ClassesDCmd::ClassesDCmd(outputStream* output, bool heap) :
965 DCmdWithParser(output, heap),
966 _verbose("-verbose",
967 "Dump the detailed content of a Java class. "
968 "Some classes are annotated with flags: "
969 "F = has, or inherits, a non-empty finalize method, "
970 "f = has final method, "
971 "W = methods rewritten, "
972 "C = marked with @Contended annotation, "
973 "R = has been redefined, "
974 "S = is shared class",
975 "BOOLEAN", false, "false") {
976 _dcmdparser.add_dcmd_option(&_verbose);
977 }
978
979 class VM_PrintClasses : public VM_Operation {
980 private:
981 outputStream* _out;
982 bool _verbose;
983 public:
984 VM_PrintClasses(outputStream* out, bool verbose) : _out(out), _verbose(verbose) {}
985
986 virtual VMOp_Type type() const { return VMOp_PrintClasses; }
987
988 virtual void doit() {
989 PrintClassClosure closure(_out, _verbose);
990 ClassLoaderDataGraph::classes_do(&closure);
991 }
992 };
993
994 void ClassesDCmd::execute(DCmdSource source, TRAPS) {
995 VM_PrintClasses vmop(output(), _verbose.value());
996 VMThread::execute(&vmop);
997 }
998
999 #if INCLUDE_CDS
1000 #define DEFAULT_CDS_ARCHIVE_FILENAME "java_pid<pid>_<subcmd>.jsa"
1001
1002 DumpSharedArchiveDCmd::DumpSharedArchiveDCmd(outputStream* output, bool heap) :
1003 DCmdWithParser(output, heap),
1004 _suboption("subcmd", "static_dump | dynamic_dump", "STRING", true),
1005 _filename("filename", "Name of shared archive to be dumped", "STRING", false,
1006 DEFAULT_CDS_ARCHIVE_FILENAME)
1007 {
1008 _dcmdparser.add_dcmd_argument(&_suboption);
1009 _dcmdparser.add_dcmd_argument(&_filename);
1010 }
1011
1012 void DumpSharedArchiveDCmd::execute(DCmdSource source, TRAPS) {
1013 jboolean is_static;
1014 const char* scmd = _suboption.value();
1015
1016 // The check for _filename.is_set() is because we don't want to use
1017 // DEFAULT_CDS_ARCHIVE_FILENAME, since it is meant as a description
1018 // of the default, not the actual default.
1019 const char* file = _filename.is_set() ? _filename.value() : nullptr;
1020
1021 if (strcmp(scmd, "static_dump") == 0) {
1022 is_static = JNI_TRUE;
1023 output()->print("Static dump: ");
1024 } else if (strcmp(scmd, "dynamic_dump") == 0) {
1025 is_static = JNI_FALSE;
1026 output()->print("Dynamic dump: ");
1027 if (!CDSConfig::is_using_archive()) {
1028 output()->print_cr("Dynamic dump is unsupported when base CDS archive is not loaded");
1029 return;
1030 }
1031 if (!RecordDynamicDumpInfo) {
1032 output()->print_cr("Dump dynamic should run with -XX:+RecordDynamicDumpInfo");
1033 return;
1034 }
1035 } else {
1036 output()->print_cr("Invalid command for VM.cds, valid input is static_dump or dynamic_dump");
1037 return;
1038 }
1039
1040 // call CDS.dumpSharedArchive
1041 Handle fileh;
1042 if (file != nullptr) {
1043 fileh = java_lang_String::create_from_str(_filename.value(), CHECK);
1044 }
1045 Symbol* cds_name = vmSymbols::jdk_internal_misc_CDS();
1046 Klass* cds_klass = SystemDictionary::resolve_or_fail(cds_name, true /*throw error*/, CHECK);
1047 JavaValue result(T_OBJECT);
1048 JavaCallArguments args;
1049 args.push_int(is_static);
1050 args.push_oop(fileh);
1051 JavaCalls::call_static(&result,
1052 cds_klass,
1053 vmSymbols::dumpSharedArchive(),
1054 vmSymbols::dumpSharedArchive_signature(),
1055 &args, CHECK);
1056 if (!HAS_PENDING_EXCEPTION) {
1057 assert(result.get_type() == T_OBJECT, "Sanity check");
1058 // result contains the archive name
1059 char* archive_name = java_lang_String::as_utf8_string(result.get_oop());
1060 output()->print_cr("%s", archive_name);
1061 }
1062 }
1063 #endif // INCLUDE_CDS
1064
1065 #if INCLUDE_JVMTI
1066 extern "C" typedef char const* (JNICALL *debugInit_startDebuggingViaCommandPtr)(JNIEnv* env, jthread thread, char const** transport_name,
1067 char const** address, jboolean* first_start);
1068 static debugInit_startDebuggingViaCommandPtr dvc_start_ptr = nullptr;
1069
1070 void DebugOnCmdStartDCmd::execute(DCmdSource source, TRAPS) {
1071 char const* transport = nullptr;
1072 char const* addr = nullptr;
1073 jboolean is_first_start = JNI_FALSE;
1074 JavaThread* thread = THREAD;
1075 jthread jt = JNIHandles::make_local(thread->threadObj());
1076 ThreadToNativeFromVM ttn(thread);
1077 const char *error = "Could not find jdwp agent.";
1078
1079 if (!dvc_start_ptr) {
1080 JvmtiAgentList::Iterator it = JvmtiAgentList::agents();
1081 while (it.has_next()) {
1082 JvmtiAgent* agent = it.next();
1083 if ((strcmp("jdwp", agent->name()) == 0) && (dvc_start_ptr == nullptr)) {
1084 char const* func = "debugInit_startDebuggingViaCommand";
1085 dvc_start_ptr = (debugInit_startDebuggingViaCommandPtr) os::find_agent_function(agent, false, &func, 1);
1086 }
1087 }
1088 }
1089
1090 if (dvc_start_ptr) {
1091 error = dvc_start_ptr(thread->jni_environment(), jt, &transport, &addr, &is_first_start);
1092 }
1093
1094 if (error != nullptr) {
1095 output()->print_cr("Debugging has not been started: %s", error);
1096 } else {
1097 output()->print_cr(is_first_start ? "Debugging has been started." : "Debugging is already active.");
1098 output()->print_cr("Transport : %s", transport ? transport : "#unknown");
1099 output()->print_cr("Address : %s", addr ? addr : "#unknown");
1100 }
1101 }
1102 #endif // INCLUDE_JVMTI
1103
1104 ThreadDumpToFileDCmd::ThreadDumpToFileDCmd(outputStream* output, bool heap) :
1105 DCmdWithParser(output, heap),
1106 _overwrite("-overwrite", "May overwrite existing file", "BOOLEAN", false, "false"),
1107 _format("-format", "Output format (\"plain\" or \"json\")", "STRING", false, "plain"),
1108 _filepath("filepath", "The file path to the output file", "STRING", true) {
1109 _dcmdparser.add_dcmd_option(&_overwrite);
1110 _dcmdparser.add_dcmd_option(&_format);
1111 _dcmdparser.add_dcmd_argument(&_filepath);
1112 }
1113
1114 void ThreadDumpToFileDCmd::execute(DCmdSource source, TRAPS) {
1115 bool json = (_format.value() != nullptr) && (strcmp(_format.value(), "json") == 0);
1116 char* path = _filepath.value();
1117 bool overwrite = _overwrite.value();
1118 Symbol* name = (json) ? vmSymbols::dumpThreadsToJson_name() : vmSymbols::dumpThreads_name();
1119 dumpToFile(name, vmSymbols::string_bool_byte_array_signature(), path, overwrite, CHECK);
1120 }
1121
1122 void ThreadDumpToFileDCmd::dumpToFile(Symbol* name, Symbol* signature, const char* path, bool overwrite, TRAPS) {
1123 ResourceMark rm(THREAD);
1124 HandleMark hm(THREAD);
1125
1126 Handle h_path = java_lang_String::create_from_str(path, CHECK);
1127
1128 Symbol* sym = vmSymbols::jdk_internal_vm_ThreadDumper();
1129 Klass* k = SystemDictionary::resolve_or_fail(sym, true, CHECK);
1130 InstanceKlass* ik = InstanceKlass::cast(k);
1131 if (HAS_PENDING_EXCEPTION) {
1132 java_lang_Throwable::print(PENDING_EXCEPTION, output());
1133 output()->cr();
1134 CLEAR_PENDING_EXCEPTION;
1135 return;
1136 }
1137
1138 // invoke the ThreadDump method to dump to file
1139 JavaValue result(T_OBJECT);
1140 JavaCallArguments args;
1141 args.push_oop(h_path);
1142 args.push_int(overwrite ? JNI_TRUE : JNI_FALSE);
1143 JavaCalls::call_static(&result,
1144 k,
1145 name,
1146 signature,
1147 &args,
1148 THREAD);
1149 if (HAS_PENDING_EXCEPTION) {
1150 java_lang_Throwable::print(PENDING_EXCEPTION, output());
1151 output()->cr();
1152 CLEAR_PENDING_EXCEPTION;
1153 return;
1154 }
1155
1156 // check that result is byte array
1157 oop res = cast_to_oop(result.get_jobject());
1158 assert(res->is_typeArray(), "just checking");
1159 assert(TypeArrayKlass::cast(res->klass())->element_type() == T_BYTE, "just checking");
1160
1161 // copy the bytes to the output stream
1162 typeArrayOop ba = typeArrayOop(res);
1163 jbyte* addr = typeArrayOop(res)->byte_at_addr(0);
1164 output()->print_raw((const char*)addr, ba->length());
1165 }
1166
1167 CompilationMemoryStatisticDCmd::CompilationMemoryStatisticDCmd(outputStream* output, bool heap) :
1168 DCmdWithParser(output, heap),
1169 _human_readable("-H", "Human readable format", "BOOLEAN", false, "false"),
1170 _minsize("-s", "Minimum memory size", "MEMORY SIZE", false, "0") {
1171 _dcmdparser.add_dcmd_option(&_human_readable);
1172 _dcmdparser.add_dcmd_option(&_minsize);
1173 }
1174
1175 void CompilationMemoryStatisticDCmd::execute(DCmdSource source, TRAPS) {
1176 const bool human_readable = _human_readable.value();
1177 const size_t minsize = _minsize.has_value() ? _minsize.value()._size : 0;
1178 CompilationMemoryStatistic::print_all_by_size(output(), human_readable, minsize);
1179 }
1180
1181 #ifdef LINUX
1182
1183 SystemMapDCmd::SystemMapDCmd(outputStream* output, bool heap) : DCmd(output, heap) {}
1184
1185 void SystemMapDCmd::execute(DCmdSource source, TRAPS) {
1186 MemMapPrinter::print_all_mappings(output());
1187 }
1188
1189 static constexpr char default_filename[] = "vm_memory_map_<pid>.txt";
1190
1191 SystemDumpMapDCmd::SystemDumpMapDCmd(outputStream* output, bool heap) :
1192 DCmdWithParser(output, heap),
1193 _filename("-F", "file path", "STRING", false, default_filename) {
1194 _dcmdparser.add_dcmd_option(&_filename);
1195 }
1196
1197 void SystemDumpMapDCmd::execute(DCmdSource source, TRAPS) {
1198 stringStream defaultname;
1199 const char* name = nullptr;
1200 if (_filename.is_set()) {
1201 name = _filename.value();
1202 } else {
1203 defaultname.print("vm_memory_map_%d.txt", os::current_process_id());
1204 name = defaultname.base();
1205 }
1206 fileStream fs(name);
1207 if (fs.is_open()) {
1208 if (!MemTracker::enabled()) {
1209 output()->print_cr("(NMT is disabled, will not annotate mappings).");
1210 }
1211 MemMapPrinter::print_all_mappings(&fs);
1212 // For the readers convenience, resolve path name.
1213 char tmp[JVM_MAXPATHLEN];
1214 const char* absname = os::Posix::realpath(name, tmp, sizeof(tmp));
1215 name = absname != nullptr ? absname : name;
1216 output()->print_cr("Memory map dumped to \"%s\".", name);
1217 } else {
1218 output()->print_cr("Failed to open \"%s\" for writing (%s).", name, os::strerror(errno));
1219 }
1220 }
1221
1222 #endif // LINUX