1 /*
2 * Copyright (c) 2011, 2023, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "cds/cds_globals.hpp"
27 #include "classfile/classLoaderDataGraph.hpp"
28 #include "classfile/classLoaderHierarchyDCmd.hpp"
29 #include "classfile/classLoaderStats.hpp"
30 #include "classfile/javaClasses.hpp"
31 #include "classfile/systemDictionary.hpp"
32 #include "classfile/vmClasses.hpp"
33 #include "code/codeCache.hpp"
34 #include "compiler/compilationMemoryStatistic.hpp"
35 #include "compiler/compiler_globals.hpp"
36 #include "compiler/compileBroker.hpp"
37 #include "compiler/directivesParser.hpp"
38 #include "gc/shared/gcVMOperations.hpp"
39 #include "jvm.h"
40 #include "memory/metaspace/metaspaceDCmd.hpp"
41 #include "memory/resourceArea.hpp"
42 #include "memory/universe.hpp"
43 #include "nmt/memMapPrinter.hpp"
44 #include "nmt/memTracker.hpp"
45 #include "nmt/nmtDCmd.hpp"
46 #include "oops/instanceKlass.hpp"
47 #include "oops/objArrayOop.inline.hpp"
48 #include "oops/oop.inline.hpp"
49 #include "oops/typeArrayOop.inline.hpp"
50 #include "prims/jvmtiAgentList.hpp"
51 #include "runtime/fieldDescriptor.inline.hpp"
52 #include "runtime/flags/jvmFlag.hpp"
53 #include "runtime/handles.inline.hpp"
54 #include "runtime/interfaceSupport.inline.hpp"
55 #include "runtime/javaCalls.hpp"
56 #include "runtime/jniHandles.hpp"
57 #include "runtime/os.hpp"
58 #include "runtime/vmOperations.hpp"
59 #include "runtime/vm_version.hpp"
60 #include "services/diagnosticArgument.hpp"
61 #include "services/diagnosticCommand.hpp"
62 #include "services/diagnosticFramework.hpp"
63 #include "services/heapDumper.hpp"
64 #include "services/management.hpp"
65 #include "services/writeableFlags.hpp"
66 #include "utilities/debug.hpp"
67 #include "utilities/events.hpp"
68 #include "utilities/formatBuffer.hpp"
69 #include "utilities/macros.hpp"
70 #include "utilities/parseInteger.hpp"
71 #ifdef LINUX
72 #include "os_posix.hpp"
73 #include "mallocInfoDcmd.hpp"
74 #include "trimCHeapDCmd.hpp"
75 #include <errno.h>
76 #endif
77
78 static void loadAgentModule(TRAPS) {
79 ResourceMark rm(THREAD);
80 HandleMark hm(THREAD);
81
82 JavaValue result(T_OBJECT);
83 Handle h_module_name = java_lang_String::create_from_str("jdk.management.agent", CHECK);
84 JavaCalls::call_static(&result,
85 vmClasses::module_Modules_klass(),
86 vmSymbols::loadModule_name(),
87 vmSymbols::loadModule_signature(),
88 h_module_name,
89 THREAD);
90 }
91
92 void DCmd::register_dcmds(){
93 // Registration of the diagnostic commands
94 // First argument specifies which interfaces will export the command
95 // Second argument specifies if the command is enabled
96 // Third argument specifies if the command is hidden
97 uint32_t full_export = DCmd_Source_Internal | DCmd_Source_AttachAPI
98 | DCmd_Source_MBean;
99 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<HelpDCmd>(full_export, true, false));
100 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VersionDCmd>(full_export, true, false));
101 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CommandLineDCmd>(full_export, true, false));
102 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<PrintSystemPropertiesDCmd>(full_export, true, false));
103 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<PrintVMFlagsDCmd>(full_export, true, false));
104 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SetVMFlagDCmd>(full_export, true, false));
105 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VMDynamicLibrariesDCmd>(full_export, true, false));
106 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VMUptimeDCmd>(full_export, true, false));
107 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VMInfoDCmd>(full_export, true, false));
108 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SystemGCDCmd>(full_export, true, false));
109 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<RunFinalizationDCmd>(full_export, true, false));
110 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<HeapInfoDCmd>(full_export, true, false));
111 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<FinalizerInfoDCmd>(full_export, true, false));
112 #if INCLUDE_SERVICES
113 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<HeapDumpDCmd>(DCmd_Source_Internal | DCmd_Source_AttachAPI, true, false));
114 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassHistogramDCmd>(full_export, true, false));
115 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SystemDictionaryDCmd>(full_export, true, false));
116 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassHierarchyDCmd>(full_export, true, false));
117 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassesDCmd>(full_export, true, false));
118 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SymboltableDCmd>(full_export, true, false));
119 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<StringtableDCmd>(full_export, true, false));
120 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<metaspace::MetaspaceDCmd>(full_export, true, false));
121 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<EventLogDCmd>(full_export, true, false));
122 #if INCLUDE_JVMTI // Both JVMTI and SERVICES have to be enabled to have this dcmd
123 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JVMTIAgentLoadDCmd>(full_export, true, false));
124 #endif // INCLUDE_JVMTI
125 #endif // INCLUDE_SERVICES
126 #if INCLUDE_JVMTI
127 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JVMTIDataDumpDCmd>(full_export, true, false));
128 #endif // INCLUDE_JVMTI
129 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ThreadDumpDCmd>(full_export, true, false));
130 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ThreadDumpToFileDCmd>(full_export, true, false));
131 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassLoaderStatsDCmd>(full_export, true, false));
132 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassLoaderHierarchyDCmd>(full_export, true, false));
133 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompileQueueDCmd>(full_export, true, false));
134 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CodeListDCmd>(full_export, true, false));
135 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CodeCacheDCmd>(full_export, true, false));
136 #ifdef LINUX
137 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<PerfMapDCmd>(full_export, true, false));
138 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<TrimCLibcHeapDCmd>(full_export, true, false));
139 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<MallocInfoDcmd>(full_export, true, false));
140 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SystemMapDCmd>(full_export, true,false));
141 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SystemDumpMapDCmd>(full_export, true,false));
142 #endif // LINUX
143 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CodeHeapAnalyticsDCmd>(full_export, true, false));
144
145 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesPrintDCmd>(full_export, true, false));
146 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesAddDCmd>(full_export, true, false));
147 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesRemoveDCmd>(full_export, true, false));
148 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesClearDCmd>(full_export, true, false));
149 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilationMemoryStatisticDCmd>(full_export, true, false));
150
151 // Enhanced JMX Agent Support
152 // These commands won't be exported via the DiagnosticCommandMBean until an
153 // appropriate permission is created for them
154 uint32_t jmx_agent_export_flags = DCmd_Source_Internal | DCmd_Source_AttachAPI;
155 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStartRemoteDCmd>(jmx_agent_export_flags, true,false));
156 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStartLocalDCmd>(jmx_agent_export_flags, true,false));
157 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStopRemoteDCmd>(jmx_agent_export_flags, true,false));
158 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStatusDCmd>(jmx_agent_export_flags, true,false));
159
160 // Debug on cmd (only makes sense with JVMTI since the agentlib needs it).
161 #if INCLUDE_JVMTI
162 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<DebugOnCmdStartDCmd>(full_export, true, true));
163 #endif // INCLUDE_JVMTI
164
165 #if INCLUDE_CDS
166 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<DumpSharedArchiveDCmd>(full_export, true, false));
167 #endif // INCLUDE_CDS
168
169 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<NMTDCmd>(full_export, true, false));
170 }
171
172 HelpDCmd::HelpDCmd(outputStream* output, bool heap) : DCmdWithParser(output, heap),
173 _all("-all", "Show help for all commands", "BOOLEAN", false, "false"),
174 _cmd("command name", "The name of the command for which we want help",
175 "STRING", false) {
176 _dcmdparser.add_dcmd_option(&_all);
177 _dcmdparser.add_dcmd_argument(&_cmd);
178 };
179
180
181 static int compare_strings(const char** s1, const char** s2) {
182 return ::strcmp(*s1, *s2);
183 }
184
185 void HelpDCmd::execute(DCmdSource source, TRAPS) {
186 if (_all.value()) {
187 GrowableArray<const char*>* cmd_list = DCmdFactory::DCmd_list(source);
188 cmd_list->sort(compare_strings);
189 for (int i = 0; i < cmd_list->length(); i++) {
190 DCmdFactory* factory = DCmdFactory::factory(source, cmd_list->at(i),
191 strlen(cmd_list->at(i)));
192 output()->print_cr("%s%s", factory->name(),
193 factory->is_enabled() ? "" : " [disabled]");
194 output()->print_cr("\t%s", factory->description());
195 output()->cr();
196 factory = factory->next();
197 }
198 } else if (_cmd.has_value()) {
199 DCmd* cmd = nullptr;
200 DCmdFactory* factory = DCmdFactory::factory(source, _cmd.value(),
201 strlen(_cmd.value()));
202 if (factory != nullptr) {
203 output()->print_cr("%s%s", factory->name(),
204 factory->is_enabled() ? "" : " [disabled]");
205 output()->print_cr("%s", factory->description());
206 output()->print_cr("\nImpact: %s", factory->impact());
207 output()->cr();
208 cmd = factory->create_resource_instance(output());
209 if (cmd != nullptr) {
210 DCmdMark mark(cmd);
211 cmd->print_help(factory->name());
212 }
213 } else {
214 output()->print_cr("Help unavailable : '%s' : No such command", _cmd.value());
215 }
216 } else {
217 output()->print_cr("The following commands are available:");
218 GrowableArray<const char *>* cmd_list = DCmdFactory::DCmd_list(source);
219 cmd_list->sort(compare_strings);
220 for (int i = 0; i < cmd_list->length(); i++) {
221 DCmdFactory* factory = DCmdFactory::factory(source, cmd_list->at(i),
222 strlen(cmd_list->at(i)));
223 output()->print_cr("%s%s", factory->name(),
224 factory->is_enabled() ? "" : " [disabled]");
225 factory = factory->_next;
226 }
227 output()->print_cr("\nFor more information about a specific command use 'help <command>'.");
228 }
229 }
230
231 void VersionDCmd::execute(DCmdSource source, TRAPS) {
232 output()->print_cr("%s version %s", VM_Version::vm_name(),
233 VM_Version::vm_release());
234 JDK_Version jdk_version = JDK_Version::current();
235 if (jdk_version.patch_version() > 0) {
236 output()->print_cr("JDK %d.%d.%d.%d", jdk_version.major_version(),
237 jdk_version.minor_version(), jdk_version.security_version(),
238 jdk_version.patch_version());
239 } else {
240 output()->print_cr("JDK %d.%d.%d", jdk_version.major_version(),
241 jdk_version.minor_version(), jdk_version.security_version());
242 }
243 }
244
245 PrintVMFlagsDCmd::PrintVMFlagsDCmd(outputStream* output, bool heap) :
246 DCmdWithParser(output, heap),
247 _all("-all", "Print all flags supported by the VM", "BOOLEAN", false, "false") {
248 _dcmdparser.add_dcmd_option(&_all);
249 }
250
251 void PrintVMFlagsDCmd::execute(DCmdSource source, TRAPS) {
252 if (_all.value()) {
253 JVMFlag::printFlags(output(), true);
254 } else {
255 JVMFlag::printSetFlags(output());
256 }
257 }
258
259 SetVMFlagDCmd::SetVMFlagDCmd(outputStream* output, bool heap) :
260 DCmdWithParser(output, heap),
261 _flag("flag name", "The name of the flag we want to set",
262 "STRING", true),
263 _value("string value", "The value we want to set", "STRING", false) {
264 _dcmdparser.add_dcmd_argument(&_flag);
265 _dcmdparser.add_dcmd_argument(&_value);
266 }
267
268 void SetVMFlagDCmd::execute(DCmdSource source, TRAPS) {
269 const char* val = nullptr;
270 if (_value.value() != nullptr) {
271 val = _value.value();
272 }
273
274 FormatBuffer<80> err_msg("%s", "");
275 int ret = WriteableFlags::set_flag(_flag.value(), val, JVMFlagOrigin::MANAGEMENT, err_msg);
276
277 if (ret != JVMFlag::SUCCESS) {
278 output()->print_cr("%s", err_msg.buffer());
279 }
280 }
281
282 void JVMTIDataDumpDCmd::execute(DCmdSource source, TRAPS) {
283 if (JvmtiExport::should_post_data_dump()) {
284 JvmtiExport::post_data_dump();
285 }
286 }
287
288 #if INCLUDE_SERVICES
289 #if INCLUDE_JVMTI
290 JVMTIAgentLoadDCmd::JVMTIAgentLoadDCmd(outputStream* output, bool heap) :
291 DCmdWithParser(output, heap),
292 _libpath("library path", "Absolute path of the JVMTI agent to load.",
293 "STRING", true),
294 _option("agent option", "Option string to pass the agent.", "STRING", false) {
295 _dcmdparser.add_dcmd_argument(&_libpath);
296 _dcmdparser.add_dcmd_argument(&_option);
297 }
298
299 void JVMTIAgentLoadDCmd::execute(DCmdSource source, TRAPS) {
300
301 if (_libpath.value() == nullptr) {
302 output()->print_cr("JVMTI.agent_load dcmd needs library path.");
303 return;
304 }
305
306 char *suffix = strrchr(_libpath.value(), '.');
307 bool is_java_agent = (suffix != nullptr) && (strncmp(".jar", suffix, 4) == 0);
308
309 if (is_java_agent) {
310 if (_option.value() == nullptr) {
311 JvmtiAgentList::load_agent("instrument", "false", _libpath.value(), output());
312 } else {
313 size_t opt_len = strlen(_libpath.value()) + strlen(_option.value()) + 2;
314 if (opt_len > 4096) {
315 output()->print_cr("JVMTI agent attach failed: Options is too long.");
316 return;
317 }
318
319 char *opt = (char *)os::malloc(opt_len, mtInternal);
320 if (opt == nullptr) {
321 output()->print_cr("JVMTI agent attach failed: "
322 "Could not allocate " SIZE_FORMAT " bytes for argument.",
323 opt_len);
324 return;
325 }
326
327 jio_snprintf(opt, opt_len, "%s=%s", _libpath.value(), _option.value());
328 JvmtiAgentList::load_agent("instrument", "false", opt, output());
329
330 os::free(opt);
331 }
332 } else {
333 JvmtiAgentList::load_agent(_libpath.value(), "true", _option.value(), output());
334 }
335 }
336
337 #endif // INCLUDE_JVMTI
338 #endif // INCLUDE_SERVICES
339
340 void PrintSystemPropertiesDCmd::execute(DCmdSource source, TRAPS) {
341 // load VMSupport
342 Symbol* klass = vmSymbols::jdk_internal_vm_VMSupport();
343 Klass* k = SystemDictionary::resolve_or_fail(klass, true, CHECK);
344 InstanceKlass* ik = InstanceKlass::cast(k);
345 if (ik->should_be_initialized()) {
346 ik->initialize(THREAD);
347 }
348 if (HAS_PENDING_EXCEPTION) {
349 java_lang_Throwable::print(PENDING_EXCEPTION, output());
350 output()->cr();
351 CLEAR_PENDING_EXCEPTION;
352 return;
353 }
354
355 // invoke the serializePropertiesToByteArray method
356 JavaValue result(T_OBJECT);
357 JavaCallArguments args;
358
359 Symbol* signature = vmSymbols::void_byte_array_signature();
360 JavaCalls::call_static(&result,
361 ik,
362 vmSymbols::serializePropertiesToByteArray_name(),
363 signature,
364 &args,
365 THREAD);
366 if (HAS_PENDING_EXCEPTION) {
367 java_lang_Throwable::print(PENDING_EXCEPTION, output());
368 output()->cr();
369 CLEAR_PENDING_EXCEPTION;
370 return;
371 }
372
373 // The result should be a [B
374 oop res = result.get_oop();
375 assert(res->is_typeArray(), "just checking");
376 assert(TypeArrayKlass::cast(res->klass())->element_type() == T_BYTE, "just checking");
377
378 // copy the bytes to the output stream
379 typeArrayOop ba = typeArrayOop(res);
380 jbyte* addr = typeArrayOop(res)->byte_at_addr(0);
381 output()->print_raw((const char*)addr, ba->length());
382 }
383
384 VMUptimeDCmd::VMUptimeDCmd(outputStream* output, bool heap) :
385 DCmdWithParser(output, heap),
386 _date("-date", "Add a prefix with current date", "BOOLEAN", false, "false") {
387 _dcmdparser.add_dcmd_option(&_date);
388 }
389
390 void VMUptimeDCmd::execute(DCmdSource source, TRAPS) {
391 if (_date.value()) {
392 output()->date_stamp(true, "", ": ");
393 }
394 output()->time_stamp().update_to(tty->time_stamp().ticks());
395 output()->stamp();
396 output()->print_cr(" s");
397 }
398
399 void VMInfoDCmd::execute(DCmdSource source, TRAPS) {
400 VMError::print_vm_info(_output);
401 }
402
403 void SystemGCDCmd::execute(DCmdSource source, TRAPS) {
404 Universe::heap()->collect(GCCause::_dcmd_gc_run);
405 }
406
407 void RunFinalizationDCmd::execute(DCmdSource source, TRAPS) {
408 Klass* k = vmClasses::System_klass();
409 JavaValue result(T_VOID);
410 JavaCalls::call_static(&result, k,
411 vmSymbols::run_finalization_name(),
412 vmSymbols::void_method_signature(), CHECK);
413 }
414
415 void HeapInfoDCmd::execute(DCmdSource source, TRAPS) {
416 MutexLocker hl(THREAD, Heap_lock);
417 Universe::heap()->print_on(output());
418 }
419
420 void FinalizerInfoDCmd::execute(DCmdSource source, TRAPS) {
421 ResourceMark rm(THREAD);
422
423 if (!InstanceKlass::is_finalization_enabled()) {
424 output()->print_cr("Finalization is disabled");
425 return;
426 }
427
428 Klass* k = SystemDictionary::resolve_or_fail(
429 vmSymbols::finalizer_histogram_klass(), true, CHECK);
430
431 JavaValue result(T_ARRAY);
432
433 // We are calling lang.ref.FinalizerHistogram.getFinalizerHistogram() method
434 // and expect it to return array of FinalizerHistogramEntry as Object[]
435
436 JavaCalls::call_static(&result, k,
437 vmSymbols::get_finalizer_histogram_name(),
438 vmSymbols::void_finalizer_histogram_entry_array_signature(), CHECK);
439
440 objArrayOop result_oop = (objArrayOop) result.get_oop();
441 if (result_oop->length() == 0) {
442 output()->print_cr("No instances waiting for finalization found");
443 return;
444 }
445
446 oop foop = result_oop->obj_at(0);
447 InstanceKlass* ik = InstanceKlass::cast(foop->klass());
448
449 fieldDescriptor count_fd, name_fd;
450
451 Klass* count_res = ik->find_field(
452 vmSymbols::finalizer_histogram_entry_count_field(), vmSymbols::int_signature(), &count_fd);
453
454 Klass* name_res = ik->find_field(
455 vmSymbols::finalizer_histogram_entry_name_field(), vmSymbols::string_signature(), &name_fd);
456
457 assert(count_res != nullptr && name_res != nullptr, "Unexpected layout of FinalizerHistogramEntry");
458
459 output()->print_cr("Unreachable instances waiting for finalization");
460 output()->print_cr("#instances class name");
461 output()->print_cr("-----------------------");
462
463 for (int i = 0; i < result_oop->length(); ++i) {
464 oop element_oop = result_oop->obj_at(i);
465 oop str_oop = element_oop->obj_field(name_fd.offset());
466 char *name = java_lang_String::as_utf8_string(str_oop);
467 int count = element_oop->int_field(count_fd.offset());
468 output()->print_cr("%10d %s", count, name);
469 }
470 }
471
472 #if INCLUDE_SERVICES // Heap dumping/inspection supported
473 HeapDumpDCmd::HeapDumpDCmd(outputStream* output, bool heap) :
474 DCmdWithParser(output, heap),
475 _filename("filename","Name of the dump file", "STRING",true),
476 _all("-all", "Dump all objects, including unreachable objects",
477 "BOOLEAN", false, "false"),
478 _gzip("-gz", "If specified, the heap dump is written in gzipped format "
479 "using the given compression level. 1 (recommended) is the fastest, "
480 "9 the strongest compression.", "INT", false, "1"),
481 _overwrite("-overwrite", "If specified, the dump file will be overwritten if it exists",
482 "BOOLEAN", false, "false"),
483 _parallel("-parallel", "Number of parallel threads to use for heap dump. The VM "
484 "will try to use the specified number of threads, but might use fewer.",
485 "INT", false, "1") {
486 _dcmdparser.add_dcmd_option(&_all);
487 _dcmdparser.add_dcmd_argument(&_filename);
488 _dcmdparser.add_dcmd_option(&_gzip);
489 _dcmdparser.add_dcmd_option(&_overwrite);
490 _dcmdparser.add_dcmd_option(&_parallel);
491 }
492
493 void HeapDumpDCmd::execute(DCmdSource source, TRAPS) {
494 jlong level = -1; // -1 means no compression.
495 jlong parallel = HeapDumper::default_num_of_dump_threads();
496
497 if (_gzip.is_set()) {
498 level = _gzip.value();
499
500 if (level < 1 || level > 9) {
501 output()->print_cr("Compression level out of range (1-9): " JLONG_FORMAT, level);
502 return;
503 }
504 }
505
506 if (_parallel.is_set()) {
507 parallel = _parallel.value();
508
509 if (parallel < 0) {
510 output()->print_cr("Invalid number of parallel dump threads.");
511 return;
512 } else if (parallel == 0) {
513 // 0 implies to disable parallel heap dump, in such case, we use serial dump instead
514 parallel = 1;
515 }
516 }
517
518 // Request a full GC before heap dump if _all is false
519 // This helps reduces the amount of unreachable objects in the dump
520 // and makes it easier to browse.
521 HeapDumper dumper(!_all.value() /* request GC if _all is false*/);
522 dumper.dump(_filename.value(), output(), (int) level, _overwrite.value(), (uint)parallel);
523 }
524
525 ClassHistogramDCmd::ClassHistogramDCmd(outputStream* output, bool heap) :
526 DCmdWithParser(output, heap),
527 _all("-all", "Inspect all objects, including unreachable objects",
528 "BOOLEAN", false, "false"),
529 _parallel_thread_num("-parallel",
530 "Number of parallel threads to use for heap inspection. "
531 "0 (the default) means let the VM determine the number of threads to use. "
532 "1 means use one thread (disable parallelism). "
533 "For any other value the VM will try to use the specified number of "
534 "threads, but might use fewer.",
535 "INT", false, "0") {
536 _dcmdparser.add_dcmd_option(&_all);
537 _dcmdparser.add_dcmd_option(&_parallel_thread_num);
538 }
539
540 void ClassHistogramDCmd::execute(DCmdSource source, TRAPS) {
541 jlong num = _parallel_thread_num.value();
542 if (num < 0) {
543 output()->print_cr("Parallel thread number out of range (>=0): " JLONG_FORMAT, num);
544 return;
545 }
546 uint parallel_thread_num = num == 0
547 ? MAX2<uint>(1, (uint)os::initial_active_processor_count() * 3 / 8)
548 : num;
549 VM_GC_HeapInspection heapop(output(),
550 !_all.value(), /* request full gc if false */
551 parallel_thread_num);
552 VMThread::execute(&heapop);
553 }
554
555 #endif // INCLUDE_SERVICES
556
557 ThreadDumpDCmd::ThreadDumpDCmd(outputStream* output, bool heap) :
558 DCmdWithParser(output, heap),
559 _locks("-l", "print java.util.concurrent locks", "BOOLEAN", false, "false"),
560 _extended("-e", "print extended thread information", "BOOLEAN", false, "false") {
561 _dcmdparser.add_dcmd_option(&_locks);
562 _dcmdparser.add_dcmd_option(&_extended);
563 }
564
565 void ThreadDumpDCmd::execute(DCmdSource source, TRAPS) {
566 // thread stacks and JNI global handles
567 VM_PrintThreads op1(output(), _locks.value(), _extended.value(), true /* print JNI handle info */);
568 VMThread::execute(&op1);
569
570 // Deadlock detection
571 VM_FindDeadlocks op2(output());
572 VMThread::execute(&op2);
573 }
574
575 // Enhanced JMX Agent support
576
577 JMXStartRemoteDCmd::JMXStartRemoteDCmd(outputStream *output, bool heap_allocated) :
578
579 DCmdWithParser(output, heap_allocated),
580
581 _config_file
582 ("config.file",
583 "set com.sun.management.config.file", "STRING", false),
584
585 _jmxremote_host
586 ("jmxremote.host",
587 "set com.sun.management.jmxremote.host", "STRING", false),
588
589 _jmxremote_port
590 ("jmxremote.port",
591 "set com.sun.management.jmxremote.port", "STRING", false),
592
593 _jmxremote_rmi_port
594 ("jmxremote.rmi.port",
595 "set com.sun.management.jmxremote.rmi.port", "STRING", false),
596
597 _jmxremote_ssl
598 ("jmxremote.ssl",
599 "set com.sun.management.jmxremote.ssl", "STRING", false),
600
601 _jmxremote_registry_ssl
602 ("jmxremote.registry.ssl",
603 "set com.sun.management.jmxremote.registry.ssl", "STRING", false),
604
605 _jmxremote_authenticate
606 ("jmxremote.authenticate",
607 "set com.sun.management.jmxremote.authenticate", "STRING", false),
608
609 _jmxremote_password_file
610 ("jmxremote.password.file",
611 "set com.sun.management.jmxremote.password.file", "STRING", false),
612
613 _jmxremote_access_file
614 ("jmxremote.access.file",
615 "set com.sun.management.jmxremote.access.file", "STRING", false),
616
617 _jmxremote_login_config
618 ("jmxremote.login.config",
619 "set com.sun.management.jmxremote.login.config", "STRING", false),
620
621 _jmxremote_ssl_enabled_cipher_suites
622 ("jmxremote.ssl.enabled.cipher.suites",
623 "set com.sun.management.jmxremote.ssl.enabled.cipher.suite", "STRING", false),
624
625 _jmxremote_ssl_enabled_protocols
626 ("jmxremote.ssl.enabled.protocols",
627 "set com.sun.management.jmxremote.ssl.enabled.protocols", "STRING", false),
628
629 _jmxremote_ssl_need_client_auth
630 ("jmxremote.ssl.need.client.auth",
631 "set com.sun.management.jmxremote.need.client.auth", "STRING", false),
632
633 _jmxremote_ssl_config_file
634 ("jmxremote.ssl.config.file",
635 "set com.sun.management.jmxremote.ssl.config.file", "STRING", false),
636
637 // JDP Protocol support
638 _jmxremote_autodiscovery
639 ("jmxremote.autodiscovery",
640 "set com.sun.management.jmxremote.autodiscovery", "STRING", false),
641
642 _jdp_port
643 ("jdp.port",
644 "set com.sun.management.jdp.port", "INT", false),
645
646 _jdp_address
647 ("jdp.address",
648 "set com.sun.management.jdp.address", "STRING", false),
649
650 _jdp_source_addr
651 ("jdp.source_addr",
652 "set com.sun.management.jdp.source_addr", "STRING", false),
653
654 _jdp_ttl
655 ("jdp.ttl",
656 "set com.sun.management.jdp.ttl", "INT", false),
657
658 _jdp_pause
659 ("jdp.pause",
660 "set com.sun.management.jdp.pause", "INT", false),
661
662 _jdp_name
663 ("jdp.name",
664 "set com.sun.management.jdp.name", "STRING", false)
665
666 {
667 _dcmdparser.add_dcmd_option(&_config_file);
668 _dcmdparser.add_dcmd_option(&_jmxremote_host);
669 _dcmdparser.add_dcmd_option(&_jmxremote_port);
670 _dcmdparser.add_dcmd_option(&_jmxremote_rmi_port);
671 _dcmdparser.add_dcmd_option(&_jmxremote_ssl);
672 _dcmdparser.add_dcmd_option(&_jmxremote_registry_ssl);
673 _dcmdparser.add_dcmd_option(&_jmxremote_authenticate);
674 _dcmdparser.add_dcmd_option(&_jmxremote_password_file);
675 _dcmdparser.add_dcmd_option(&_jmxremote_access_file);
676 _dcmdparser.add_dcmd_option(&_jmxremote_login_config);
677 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_enabled_cipher_suites);
678 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_enabled_protocols);
679 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_need_client_auth);
680 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_config_file);
681 _dcmdparser.add_dcmd_option(&_jmxremote_autodiscovery);
682 _dcmdparser.add_dcmd_option(&_jdp_port);
683 _dcmdparser.add_dcmd_option(&_jdp_address);
684 _dcmdparser.add_dcmd_option(&_jdp_source_addr);
685 _dcmdparser.add_dcmd_option(&_jdp_ttl);
686 _dcmdparser.add_dcmd_option(&_jdp_pause);
687 _dcmdparser.add_dcmd_option(&_jdp_name);
688 }
689
690 void JMXStartRemoteDCmd::execute(DCmdSource source, TRAPS) {
691 ResourceMark rm(THREAD);
692 HandleMark hm(THREAD);
693
694 // Load and initialize the jdk.internal.agent.Agent class
695 // invoke startRemoteManagementAgent(string) method to start
696 // the remote management server.
697 // throw java.lang.NoSuchMethodError if the method doesn't exist
698
699 loadAgentModule(CHECK);
700 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
701 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::jdk_internal_agent_Agent(), loader, Handle(), true, CHECK);
702
703 JavaValue result(T_VOID);
704
705 // Pass all command line arguments to java as key=value,...
706 // All checks are done on java side
707
708 int len = 0;
709 stringStream options;
710 char comma[2] = {0,0};
711
712 // Leave default values on Agent.class side and pass only
713 // arguments explicitly set by user. All arguments passed
714 // to jcmd override properties with the same name set by
715 // command line with -D or by managmenent.properties
716 // file.
717 #define PUT_OPTION(a) \
718 do { \
719 if ( (a).is_set() ){ \
720 if ( *((a).type()) == 'I' ) { \
721 options.print("%scom.sun.management.%s=" JLONG_FORMAT, comma, (a).name(), (jlong)((a).value())); \
722 } else { \
723 options.print("%scom.sun.management.%s=%s", comma, (a).name(), (char*)((a).value())); \
724 } \
725 comma[0] = ','; \
726 }\
727 } while(0);
728
729
730 PUT_OPTION(_config_file);
731 PUT_OPTION(_jmxremote_host);
732 PUT_OPTION(_jmxremote_port);
733 PUT_OPTION(_jmxremote_rmi_port);
734 PUT_OPTION(_jmxremote_ssl);
735 PUT_OPTION(_jmxremote_registry_ssl);
736 PUT_OPTION(_jmxremote_authenticate);
737 PUT_OPTION(_jmxremote_password_file);
738 PUT_OPTION(_jmxremote_access_file);
739 PUT_OPTION(_jmxremote_login_config);
740 PUT_OPTION(_jmxremote_ssl_enabled_cipher_suites);
741 PUT_OPTION(_jmxremote_ssl_enabled_protocols);
742 PUT_OPTION(_jmxremote_ssl_need_client_auth);
743 PUT_OPTION(_jmxremote_ssl_config_file);
744 PUT_OPTION(_jmxremote_autodiscovery);
745 PUT_OPTION(_jdp_port);
746 PUT_OPTION(_jdp_address);
747 PUT_OPTION(_jdp_source_addr);
748 PUT_OPTION(_jdp_ttl);
749 PUT_OPTION(_jdp_pause);
750 PUT_OPTION(_jdp_name);
751
752 #undef PUT_OPTION
753
754 Handle str = java_lang_String::create_from_str(options.as_string(), CHECK);
755 JavaCalls::call_static(&result, k, vmSymbols::startRemoteAgent_name(), vmSymbols::string_void_signature(), str, CHECK);
756 }
757
758 JMXStartLocalDCmd::JMXStartLocalDCmd(outputStream *output, bool heap_allocated) :
759 DCmd(output, heap_allocated) {
760 // do nothing
761 }
762
763 void JMXStartLocalDCmd::execute(DCmdSource source, TRAPS) {
764 ResourceMark rm(THREAD);
765 HandleMark hm(THREAD);
766
767 // Load and initialize the jdk.internal.agent.Agent class
768 // invoke startLocalManagementAgent(void) method to start
769 // the local management server
770 // throw java.lang.NoSuchMethodError if method doesn't exist
771
772 loadAgentModule(CHECK);
773 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
774 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::jdk_internal_agent_Agent(), loader, Handle(), true, CHECK);
775
776 JavaValue result(T_VOID);
777 JavaCalls::call_static(&result, k, vmSymbols::startLocalAgent_name(), vmSymbols::void_method_signature(), CHECK);
778 }
779
780 void JMXStopRemoteDCmd::execute(DCmdSource source, TRAPS) {
781 ResourceMark rm(THREAD);
782 HandleMark hm(THREAD);
783
784 // Load and initialize the jdk.internal.agent.Agent class
785 // invoke stopRemoteManagementAgent method to stop the
786 // management server
787 // throw java.lang.NoSuchMethodError if method doesn't exist
788
789 loadAgentModule(CHECK);
790 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
791 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::jdk_internal_agent_Agent(), loader, Handle(), true, CHECK);
792
793 JavaValue result(T_VOID);
794 JavaCalls::call_static(&result, k, vmSymbols::stopRemoteAgent_name(), vmSymbols::void_method_signature(), CHECK);
795 }
796
797 JMXStatusDCmd::JMXStatusDCmd(outputStream *output, bool heap_allocated) :
798 DCmd(output, heap_allocated) {
799 // do nothing
800 }
801
802 void JMXStatusDCmd::execute(DCmdSource source, TRAPS) {
803 ResourceMark rm(THREAD);
804 HandleMark hm(THREAD);
805
806 // Load and initialize the jdk.internal.agent.Agent class
807 // invoke getManagementAgentStatus() method to generate the status info
808 // throw java.lang.NoSuchMethodError if method doesn't exist
809
810 loadAgentModule(CHECK);
811 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
812 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::jdk_internal_agent_Agent(), loader, Handle(), true, CHECK);
813
814 JavaValue result(T_OBJECT);
815 JavaCalls::call_static(&result, k, vmSymbols::getAgentStatus_name(), vmSymbols::void_string_signature(), CHECK);
816
817 jvalue* jv = (jvalue*) result.get_value_addr();
818 oop str = cast_to_oop(jv->l);
819 if (str != nullptr) {
820 char* out = java_lang_String::as_utf8_string(str);
821 if (out) {
822 // Avoid using print_cr() because length maybe longer than O_BUFLEN
823 output()->print_raw_cr(out);
824 return;
825 }
826 }
827 output()->print_cr("Error obtaining management agent status");
828 }
829
830 VMDynamicLibrariesDCmd::VMDynamicLibrariesDCmd(outputStream *output, bool heap_allocated) :
831 DCmd(output, heap_allocated) {
832 // do nothing
833 }
834
835 void VMDynamicLibrariesDCmd::execute(DCmdSource source, TRAPS) {
836 os::print_dll_info(output());
837 output()->cr();
838 }
839
840 void CompileQueueDCmd::execute(DCmdSource source, TRAPS) {
841 VM_PrintCompileQueue printCompileQueueOp(output());
842 VMThread::execute(&printCompileQueueOp);
843 }
844
845 void CodeListDCmd::execute(DCmdSource source, TRAPS) {
846 CodeCache::print_codelist(output());
847 }
848
849 void CodeCacheDCmd::execute(DCmdSource source, TRAPS) {
850 CodeCache::print_layout(output());
851 }
852
853 #ifdef LINUX
854 void PerfMapDCmd::execute(DCmdSource source, TRAPS) {
855 CodeCache::write_perf_map();
856 }
857 #endif // LINUX
858
859 //---< BEGIN >--- CodeHeap State Analytics.
860 CodeHeapAnalyticsDCmd::CodeHeapAnalyticsDCmd(outputStream* output, bool heap) :
861 DCmdWithParser(output, heap),
862 _function("function", "Function to be performed (aggregate, UsedSpace, FreeSpace, MethodCount, MethodSpace, MethodAge, MethodNames, discard", "STRING", false, "all"),
863 _granularity("granularity", "Detail level - smaller value -> more detail", "INT", false, "4096") {
864 _dcmdparser.add_dcmd_argument(&_function);
865 _dcmdparser.add_dcmd_argument(&_granularity);
866 }
867
868 void CodeHeapAnalyticsDCmd::execute(DCmdSource source, TRAPS) {
869 jlong granularity = _granularity.value();
870 if (granularity < 1) {
871 Exceptions::fthrow(THREAD_AND_LOCATION, vmSymbols::java_lang_IllegalArgumentException(),
872 "Invalid granularity value " JLONG_FORMAT ". Should be positive.\n", granularity);
873 return;
874 }
875
876 CompileBroker::print_heapinfo(output(), _function.value(), granularity);
877 }
878 //---< END >--- CodeHeap State Analytics.
879
880 EventLogDCmd::EventLogDCmd(outputStream* output, bool heap) :
881 DCmdWithParser(output, heap),
882 _log("log", "Name of log to be printed. If omitted, all logs are printed.", "STRING", false, nullptr),
883 _max("max", "Maximum number of events to be printed (newest first). If omitted, all events are printed.", "STRING", false, nullptr)
884 {
885 _dcmdparser.add_dcmd_option(&_log);
886 _dcmdparser.add_dcmd_option(&_max);
887 }
888
889 void EventLogDCmd::execute(DCmdSource source, TRAPS) {
890 const char* max_value = _max.value();
891 int max = -1;
892 if (max_value != nullptr) {
893 char* endptr = nullptr;
894 int max;
895 if (!parse_integer(max_value, &max)) {
896 output()->print_cr("Invalid max option: \"%s\".", max_value);
897 return;
898 }
899 }
900 const char* log_name = _log.value();
901 if (log_name != nullptr) {
902 Events::print_one(output(), log_name, max);
903 } else {
904 Events::print_all(output(), max);
905 }
906 }
907
908 void CompilerDirectivesPrintDCmd::execute(DCmdSource source, TRAPS) {
909 DirectivesStack::print(output());
910 }
911
912 CompilerDirectivesAddDCmd::CompilerDirectivesAddDCmd(outputStream* output, bool heap) :
913 DCmdWithParser(output, heap),
914 _filename("filename","Name of the directives file", "STRING",true) {
915 _dcmdparser.add_dcmd_argument(&_filename);
916 }
917
918 void CompilerDirectivesAddDCmd::execute(DCmdSource source, TRAPS) {
919 DirectivesParser::parse_from_file(_filename.value(), output(), true);
920 }
921
922 void CompilerDirectivesRemoveDCmd::execute(DCmdSource source, TRAPS) {
923 DirectivesStack::pop(1);
924 }
925
926 void CompilerDirectivesClearDCmd::execute(DCmdSource source, TRAPS) {
927 DirectivesStack::clear();
928 }
929 #if INCLUDE_SERVICES
930 ClassHierarchyDCmd::ClassHierarchyDCmd(outputStream* output, bool heap) :
931 DCmdWithParser(output, heap),
932 _print_interfaces("-i", "Inherited interfaces should be printed.", "BOOLEAN", false, "false"),
933 _print_subclasses("-s", "If a classname is specified, print its subclasses "
934 "in addition to its superclasses. Without this option only the "
935 "superclasses will be printed.", "BOOLEAN", false, "false"),
936 _classname("classname", "Name of class whose hierarchy should be printed. "
937 "If not specified, all class hierarchies are printed.",
938 "STRING", false) {
939 _dcmdparser.add_dcmd_option(&_print_interfaces);
940 _dcmdparser.add_dcmd_option(&_print_subclasses);
941 _dcmdparser.add_dcmd_argument(&_classname);
942 }
943
944 void ClassHierarchyDCmd::execute(DCmdSource source, TRAPS) {
945 VM_PrintClassHierarchy printClassHierarchyOp(output(), _print_interfaces.value(),
946 _print_subclasses.value(), _classname.value());
947 VMThread::execute(&printClassHierarchyOp);
948 }
949 #endif
950
951 ClassesDCmd::ClassesDCmd(outputStream* output, bool heap) :
952 DCmdWithParser(output, heap),
953 _verbose("-verbose",
954 "Dump the detailed content of a Java class. "
955 "Some classes are annotated with flags: "
956 "F = has, or inherits, a non-empty finalize method, "
957 "f = has final method, "
958 "W = methods rewritten, "
959 "C = marked with @Contended annotation, "
960 "R = has been redefined, "
961 "S = is shared class",
962 "BOOLEAN", false, "false") {
963 _dcmdparser.add_dcmd_option(&_verbose);
964 }
965
966 class VM_PrintClasses : public VM_Operation {
967 private:
968 outputStream* _out;
969 bool _verbose;
970 public:
971 VM_PrintClasses(outputStream* out, bool verbose) : _out(out), _verbose(verbose) {}
972
973 virtual VMOp_Type type() const { return VMOp_PrintClasses; }
974
975 virtual void doit() {
976 PrintClassClosure closure(_out, _verbose);
977 ClassLoaderDataGraph::classes_do(&closure);
978 }
979 };
980
981 void ClassesDCmd::execute(DCmdSource source, TRAPS) {
982 VM_PrintClasses vmop(output(), _verbose.is_set());
983 VMThread::execute(&vmop);
984 }
985
986 #if INCLUDE_CDS
987 DumpSharedArchiveDCmd::DumpSharedArchiveDCmd(outputStream* output, bool heap) :
988 DCmdWithParser(output, heap),
989 _suboption("subcmd", "static_dump | dynamic_dump", "STRING", true),
990 _filename("filename", "Name of shared archive to be dumped", "STRING", false)
991 {
992 _dcmdparser.add_dcmd_argument(&_suboption);
993 _dcmdparser.add_dcmd_argument(&_filename);
994 }
995
996 void DumpSharedArchiveDCmd::execute(DCmdSource source, TRAPS) {
997 jboolean is_static;
998 const char* scmd = _suboption.value();
999 const char* file = _filename.value();
1000
1001 if (strcmp(scmd, "static_dump") == 0) {
1002 is_static = JNI_TRUE;
1003 output()->print("Static dump: ");
1004 } else if (strcmp(scmd, "dynamic_dump") == 0) {
1005 is_static = JNI_FALSE;
1006 output()->print("Dynamic dump: ");
1007 if (!UseSharedSpaces) {
1008 output()->print_cr("Dynamic dump is unsupported when base CDS archive is not loaded");
1009 return;
1010 }
1011 if (!RecordDynamicDumpInfo) {
1012 output()->print_cr("Dump dynamic should run with -XX:+RecordDynamicDumpInfo");
1013 return;
1014 }
1015 } else {
1016 output()->print_cr("Invalid command for VM.cds, valid input is static_dump or dynamic_dump");
1017 return;
1018 }
1019
1020 // call CDS.dumpSharedArchive
1021 Handle fileh;
1022 if (file != nullptr) {
1023 fileh = java_lang_String::create_from_str(_filename.value(), CHECK);
1024 }
1025 Symbol* cds_name = vmSymbols::jdk_internal_misc_CDS();
1026 Klass* cds_klass = SystemDictionary::resolve_or_fail(cds_name, true /*throw error*/, CHECK);
1027 JavaValue result(T_OBJECT);
1028 JavaCallArguments args;
1029 args.push_int(is_static);
1030 args.push_oop(fileh);
1031 JavaCalls::call_static(&result,
1032 cds_klass,
1033 vmSymbols::dumpSharedArchive(),
1034 vmSymbols::dumpSharedArchive_signature(),
1035 &args, CHECK);
1036 if (!HAS_PENDING_EXCEPTION) {
1037 assert(result.get_type() == T_OBJECT, "Sanity check");
1038 // result contains the archive name
1039 char* archive_name = java_lang_String::as_utf8_string(result.get_oop());
1040 output()->print_cr("%s", archive_name);
1041 }
1042 }
1043 #endif // INCLUDE_CDS
1044
1045 #if INCLUDE_JVMTI
1046 extern "C" typedef char const* (JNICALL *debugInit_startDebuggingViaCommandPtr)(JNIEnv* env, jthread thread, char const** transport_name,
1047 char const** address, jboolean* first_start);
1048 static debugInit_startDebuggingViaCommandPtr dvc_start_ptr = nullptr;
1049
1050 void DebugOnCmdStartDCmd::execute(DCmdSource source, TRAPS) {
1051 char const* transport = nullptr;
1052 char const* addr = nullptr;
1053 jboolean is_first_start = JNI_FALSE;
1054 JavaThread* thread = THREAD;
1055 jthread jt = JNIHandles::make_local(thread->threadObj());
1056 ThreadToNativeFromVM ttn(thread);
1057 const char *error = "Could not find jdwp agent.";
1058
1059 if (!dvc_start_ptr) {
1060 JvmtiAgentList::Iterator it = JvmtiAgentList::agents();
1061 while (it.has_next()) {
1062 JvmtiAgent* agent = it.next();
1063 if ((strcmp("jdwp", agent->name()) == 0) && (dvc_start_ptr == nullptr)) {
1064 char const* func = "debugInit_startDebuggingViaCommand";
1065 dvc_start_ptr = (debugInit_startDebuggingViaCommandPtr) os::find_agent_function(agent, false, &func, 1);
1066 }
1067 }
1068 }
1069
1070 if (dvc_start_ptr) {
1071 error = dvc_start_ptr(thread->jni_environment(), jt, &transport, &addr, &is_first_start);
1072 }
1073
1074 if (error != nullptr) {
1075 output()->print_cr("Debugging has not been started: %s", error);
1076 } else {
1077 output()->print_cr(is_first_start ? "Debugging has been started." : "Debugging is already active.");
1078 output()->print_cr("Transport : %s", transport ? transport : "#unknown");
1079 output()->print_cr("Address : %s", addr ? addr : "#unknown");
1080 }
1081 }
1082 #endif // INCLUDE_JVMTI
1083
1084 ThreadDumpToFileDCmd::ThreadDumpToFileDCmd(outputStream* output, bool heap) :
1085 DCmdWithParser(output, heap),
1086 _overwrite("-overwrite", "May overwrite existing file", "BOOLEAN", false, "false"),
1087 _format("-format", "Output format (\"plain\" or \"json\")", "STRING", false, "plain"),
1088 _filepath("filepath", "The file path to the output file", "STRING", true) {
1089 _dcmdparser.add_dcmd_option(&_overwrite);
1090 _dcmdparser.add_dcmd_option(&_format);
1091 _dcmdparser.add_dcmd_argument(&_filepath);
1092 }
1093
1094 void ThreadDumpToFileDCmd::execute(DCmdSource source, TRAPS) {
1095 bool json = (_format.value() != nullptr) && (strcmp(_format.value(), "json") == 0);
1096 char* path = _filepath.value();
1097 bool overwrite = _overwrite.value();
1098 Symbol* name = (json) ? vmSymbols::dumpThreadsToJson_name() : vmSymbols::dumpThreads_name();
1099 dumpToFile(name, vmSymbols::string_bool_byte_array_signature(), path, overwrite, CHECK);
1100 }
1101
1102 void ThreadDumpToFileDCmd::dumpToFile(Symbol* name, Symbol* signature, const char* path, bool overwrite, TRAPS) {
1103 ResourceMark rm(THREAD);
1104 HandleMark hm(THREAD);
1105
1106 Handle h_path = java_lang_String::create_from_str(path, CHECK);
1107
1108 Symbol* sym = vmSymbols::jdk_internal_vm_ThreadDumper();
1109 Klass* k = SystemDictionary::resolve_or_fail(sym, true, CHECK);
1110 InstanceKlass* ik = InstanceKlass::cast(k);
1111 if (HAS_PENDING_EXCEPTION) {
1112 java_lang_Throwable::print(PENDING_EXCEPTION, output());
1113 output()->cr();
1114 CLEAR_PENDING_EXCEPTION;
1115 return;
1116 }
1117
1118 // invoke the ThreadDump method to dump to file
1119 JavaValue result(T_OBJECT);
1120 JavaCallArguments args;
1121 args.push_oop(h_path);
1122 args.push_int(overwrite ? JNI_TRUE : JNI_FALSE);
1123 JavaCalls::call_static(&result,
1124 k,
1125 name,
1126 signature,
1127 &args,
1128 THREAD);
1129 if (HAS_PENDING_EXCEPTION) {
1130 java_lang_Throwable::print(PENDING_EXCEPTION, output());
1131 output()->cr();
1132 CLEAR_PENDING_EXCEPTION;
1133 return;
1134 }
1135
1136 // check that result is byte array
1137 oop res = cast_to_oop(result.get_jobject());
1138 assert(res->is_typeArray(), "just checking");
1139 assert(TypeArrayKlass::cast(res->klass())->element_type() == T_BYTE, "just checking");
1140
1141 // copy the bytes to the output stream
1142 typeArrayOop ba = typeArrayOop(res);
1143 jbyte* addr = typeArrayOop(res)->byte_at_addr(0);
1144 output()->print_raw((const char*)addr, ba->length());
1145 }
1146
1147 CompilationMemoryStatisticDCmd::CompilationMemoryStatisticDCmd(outputStream* output, bool heap) :
1148 DCmdWithParser(output, heap),
1149 _human_readable("-H", "Human readable format", "BOOLEAN", false, "false"),
1150 _minsize("-s", "Minimum memory size", "MEMORY SIZE", false, "0") {
1151 _dcmdparser.add_dcmd_option(&_human_readable);
1152 _dcmdparser.add_dcmd_option(&_minsize);
1153 }
1154
1155 void CompilationMemoryStatisticDCmd::execute(DCmdSource source, TRAPS) {
1156 const bool human_readable = _human_readable.value();
1157 const size_t minsize = _minsize.has_value() ? _minsize.value()._size : 0;
1158 CompilationMemoryStatistic::print_all_by_size(output(), human_readable, minsize);
1159 }
1160
1161 #ifdef LINUX
1162
1163 SystemMapDCmd::SystemMapDCmd(outputStream* output, bool heap) :
1164 DCmdWithParser(output, heap),
1165 _human_readable("-H", "Human readable format", "BOOLEAN", false, "false") {
1166 _dcmdparser.add_dcmd_option(&_human_readable);
1167 }
1168
1169 void SystemMapDCmd::execute(DCmdSource source, TRAPS) {
1170 MemMapPrinter::print_all_mappings(output(), _human_readable.value());
1171 }
1172
1173 SystemDumpMapDCmd::SystemDumpMapDCmd(outputStream* output, bool heap) :
1174 DCmdWithParser(output, heap),
1175 _human_readable("-H", "Human readable format", "BOOLEAN", false, "false"),
1176 _filename("-F", "file path (defaults: \"vm_memory_map_<pid>.txt\")", "STRING", false) {
1177 _dcmdparser.add_dcmd_option(&_human_readable);
1178 _dcmdparser.add_dcmd_option(&_filename);
1179 }
1180
1181 void SystemDumpMapDCmd::execute(DCmdSource source, TRAPS) {
1182 stringStream default_name;
1183 default_name.print("vm_memory_map_%d.txt", os::current_process_id());
1184 const char* name = _filename.is_set() ? _filename.value() : default_name.base();
1185 fileStream fs(name);
1186 if (fs.is_open()) {
1187 if (!MemTracker::enabled()) {
1188 output()->print_cr("(NMT is disabled, will not annotate mappings).");
1189 }
1190 MemMapPrinter::print_all_mappings(&fs, _human_readable.value());
1191 // For the readers convenience, resolve path name.
1192 char tmp[JVM_MAXPATHLEN];
1193 const char* absname = os::Posix::realpath(name, tmp, sizeof(tmp));
1194 name = absname != nullptr ? absname : name;
1195 output()->print_cr("Memory map dumped to \"%s\".", name);
1196 } else {
1197 output()->print_cr("Failed to open \"%s\" for writing (%s).", name, os::strerror(errno));
1198 }
1199 }
1200
1201 #endif // LINUX