1 /*
2 * Copyright (c) 2011, 2018, 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 "jvm.h"
27 #include "classfile/classLoaderHierarchyDCmd.hpp"
28 #include "classfile/classLoaderStats.hpp"
29 #include "compiler/compileBroker.hpp"
30 #include "compiler/directivesParser.hpp"
31 #include "gc/shared/gcVMOperations.hpp"
32 #include "memory/metaspace/metaspaceDCmd.hpp"
33 #include "memory/resourceArea.hpp"
34 #include "oops/objArrayOop.inline.hpp"
35 #include "oops/oop.inline.hpp"
36 #include "oops/typeArrayOop.inline.hpp"
37 #include "runtime/fieldDescriptor.inline.hpp"
38 #include "runtime/flags/jvmFlag.hpp"
39 #include "runtime/handles.inline.hpp"
40 #include "runtime/interfaceSupport.inline.hpp"
41 #include "runtime/javaCalls.hpp"
42 #include "runtime/os.hpp"
43 #include "services/diagnosticArgument.hpp"
44 #include "services/diagnosticCommand.hpp"
45 #include "services/diagnosticFramework.hpp"
46 #include "services/heapDumper.hpp"
47 #include "services/management.hpp"
48 #include "services/writeableFlags.hpp"
49 #include "utilities/debug.hpp"
50 #include "utilities/formatBuffer.hpp"
51 #include "utilities/macros.hpp"
52
53
54 static void loadAgentModule(TRAPS) {
55 ResourceMark rm(THREAD);
56 HandleMark hm(THREAD);
57
58 JavaValue result(T_OBJECT);
59 Handle h_module_name = java_lang_String::create_from_str("jdk.management.agent", CHECK);
60 JavaCalls::call_static(&result,
61 SystemDictionary::module_Modules_klass(),
62 vmSymbols::loadModule_name(),
63 vmSymbols::loadModule_signature(),
64 h_module_name,
65 THREAD);
66 }
67
68 void DCmdRegistrant::register_dcmds(){
69 // Registration of the diagnostic commands
70 // First argument specifies which interfaces will export the command
71 // Second argument specifies if the command is enabled
72 // Third argument specifies if the command is hidden
73 uint32_t full_export = DCmd_Source_Internal | DCmd_Source_AttachAPI
74 | DCmd_Source_MBean;
75 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<HelpDCmd>(full_export, true, false));
76 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VersionDCmd>(full_export, true, false));
77 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CommandLineDCmd>(full_export, true, false));
78 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<PrintSystemPropertiesDCmd>(full_export, true, false));
79 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<PrintVMFlagsDCmd>(full_export, true, false));
80 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SetVMFlagDCmd>(full_export, true, false));
81 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VMDynamicLibrariesDCmd>(full_export, true, false));
82 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VMUptimeDCmd>(full_export, true, false));
83 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VMInfoDCmd>(full_export, true, false));
84 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SystemGCDCmd>(full_export, true, false));
85 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<RunFinalizationDCmd>(full_export, true, false));
86 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<HeapInfoDCmd>(full_export, true, false));
87 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<FinalizerInfoDCmd>(full_export, true, false));
88 #if INCLUDE_SERVICES
89 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<HeapDumpDCmd>(DCmd_Source_Internal | DCmd_Source_AttachAPI, true, false));
90 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassHistogramDCmd>(full_export, true, false));
91 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassStatsDCmd>(full_export, true, false));
92 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SystemDictionaryDCmd>(full_export, true, false));
93 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassHierarchyDCmd>(full_export, true, false));
94 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SymboltableDCmd>(full_export, true, false));
95 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<StringtableDCmd>(full_export, true, false));
96 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<metaspace::MetaspaceDCmd>(full_export, true, false));
97 #if INCLUDE_JVMTI // Both JVMTI and SERVICES have to be enabled to have this dcmd
98 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JVMTIAgentLoadDCmd>(full_export, true, false));
99 #endif // INCLUDE_JVMTI
100 #endif // INCLUDE_SERVICES
101 #if INCLUDE_JVMTI
102 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JVMTIDataDumpDCmd>(full_export, true, false));
103 #endif // INCLUDE_JVMTI
104 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ThreadDumpDCmd>(full_export, true, false));
105 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassLoaderStatsDCmd>(full_export, true, false));
106 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassLoaderHierarchyDCmd>(full_export, true, false));
107 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompileQueueDCmd>(full_export, true, false));
108 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CodeListDCmd>(full_export, true, false));
109 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CodeCacheDCmd>(full_export, true, false));
110 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<TouchedMethodsDCmd>(full_export, true, false));
111 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CodeHeapAnalyticsDCmd>(full_export, true, false));
112
113 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesPrintDCmd>(full_export, true, false));
114 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesAddDCmd>(full_export, true, false));
115 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesRemoveDCmd>(full_export, true, false));
116 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CompilerDirectivesClearDCmd>(full_export, true, false));
117
118 // Enhanced JMX Agent Support
119 // These commands won't be exported via the DiagnosticCommandMBean until an
120 // appropriate permission is created for them
121 uint32_t jmx_agent_export_flags = DCmd_Source_Internal | DCmd_Source_AttachAPI;
122 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStartRemoteDCmd>(jmx_agent_export_flags, true,false));
123 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStartLocalDCmd>(jmx_agent_export_flags, true,false));
124 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStopRemoteDCmd>(jmx_agent_export_flags, true,false));
125 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStatusDCmd>(jmx_agent_export_flags, true,false));
126
127 // Debug on cmd (only makes sense with JVMTI since the agentlib needs it).
128 #if INCLUDE_JVMTI
129 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<DebugOnCmdStartDCmd>(full_export, true, false));
130 #endif // INCLUDE_JVMTI
131
132 }
133
134 #ifndef HAVE_EXTRA_DCMD
135 void DCmdRegistrant::register_dcmds_ext(){
136 // Do nothing here
137 }
138 #endif
139
140
141 HelpDCmd::HelpDCmd(outputStream* output, bool heap) : DCmdWithParser(output, heap),
142 _all("-all", "Show help for all commands", "BOOLEAN", false, "false"),
143 _cmd("command name", "The name of the command for which we want help",
144 "STRING", false) {
145 _dcmdparser.add_dcmd_option(&_all);
146 _dcmdparser.add_dcmd_argument(&_cmd);
147 };
148
149
150 static int compare_strings(const char** s1, const char** s2) {
151 return ::strcmp(*s1, *s2);
152 }
153
154 void HelpDCmd::execute(DCmdSource source, TRAPS) {
155 if (_all.value()) {
156 GrowableArray<const char*>* cmd_list = DCmdFactory::DCmd_list(source);
157 cmd_list->sort(compare_strings);
158 for (int i = 0; i < cmd_list->length(); i++) {
159 DCmdFactory* factory = DCmdFactory::factory(source, cmd_list->at(i),
160 strlen(cmd_list->at(i)));
161 output()->print_cr("%s%s", factory->name(),
162 factory->is_enabled() ? "" : " [disabled]");
163 output()->print_cr("\t%s", factory->description());
164 output()->cr();
165 factory = factory->next();
166 }
167 } else if (_cmd.has_value()) {
168 DCmd* cmd = NULL;
169 DCmdFactory* factory = DCmdFactory::factory(source, _cmd.value(),
170 strlen(_cmd.value()));
171 if (factory != NULL) {
172 output()->print_cr("%s%s", factory->name(),
173 factory->is_enabled() ? "" : " [disabled]");
174 output()->print_cr("%s", factory->description());
175 output()->print_cr("\nImpact: %s", factory->impact());
176 JavaPermission p = factory->permission();
177 if(p._class != NULL) {
178 if(p._action != NULL) {
179 output()->print_cr("\nPermission: %s(%s, %s)",
180 p._class, p._name == NULL ? "null" : p._name, p._action);
181 } else {
182 output()->print_cr("\nPermission: %s(%s)",
183 p._class, p._name == NULL ? "null" : p._name);
184 }
185 }
186 output()->cr();
187 cmd = factory->create_resource_instance(output());
188 if (cmd != NULL) {
189 DCmdMark mark(cmd);
190 cmd->print_help(factory->name());
191 }
192 } else {
193 output()->print_cr("Help unavailable : '%s' : No such command", _cmd.value());
194 }
195 } else {
196 output()->print_cr("The following commands are available:");
197 GrowableArray<const char *>* cmd_list = DCmdFactory::DCmd_list(source);
198 cmd_list->sort(compare_strings);
199 for (int i = 0; i < cmd_list->length(); i++) {
200 DCmdFactory* factory = DCmdFactory::factory(source, cmd_list->at(i),
201 strlen(cmd_list->at(i)));
202 output()->print_cr("%s%s", factory->name(),
203 factory->is_enabled() ? "" : " [disabled]");
204 factory = factory->_next;
205 }
206 output()->print_cr("\nFor more information about a specific command use 'help <command>'.");
207 }
208 }
209
210 int HelpDCmd::num_arguments() {
211 ResourceMark rm;
212 HelpDCmd* dcmd = new HelpDCmd(NULL, false);
213 if (dcmd != NULL) {
214 DCmdMark mark(dcmd);
215 return dcmd->_dcmdparser.num_arguments();
216 } else {
217 return 0;
218 }
219 }
220
221 void VersionDCmd::execute(DCmdSource source, TRAPS) {
222 output()->print_cr("%s version %s", VM_Version::vm_name(),
223 VM_Version::vm_release());
224 JDK_Version jdk_version = JDK_Version::current();
225 if (jdk_version.patch_version() > 0) {
226 output()->print_cr("JDK %d.%d.%d.%d", jdk_version.major_version(),
227 jdk_version.minor_version(), jdk_version.security_version(),
228 jdk_version.patch_version());
229 } else {
230 output()->print_cr("JDK %d.%d.%d", jdk_version.major_version(),
231 jdk_version.minor_version(), jdk_version.security_version());
232 }
233 }
234
235 PrintVMFlagsDCmd::PrintVMFlagsDCmd(outputStream* output, bool heap) :
236 DCmdWithParser(output, heap),
237 _all("-all", "Print all flags supported by the VM", "BOOLEAN", false, "false") {
238 _dcmdparser.add_dcmd_option(&_all);
239 }
240
241 void PrintVMFlagsDCmd::execute(DCmdSource source, TRAPS) {
242 if (_all.value()) {
243 JVMFlag::printFlags(output(), true);
244 } else {
245 JVMFlag::printSetFlags(output());
246 }
247 }
248
249 int PrintVMFlagsDCmd::num_arguments() {
250 ResourceMark rm;
251 PrintVMFlagsDCmd* dcmd = new PrintVMFlagsDCmd(NULL, false);
252 if (dcmd != NULL) {
253 DCmdMark mark(dcmd);
254 return dcmd->_dcmdparser.num_arguments();
255 } else {
256 return 0;
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 = NULL;
271 if (_value.value() != NULL) {
272 val = _value.value();
273 }
274
275 FormatBuffer<80> err_msg("%s", "");
276 int ret = WriteableFlags::set_flag(_flag.value(), val, JVMFlag::MANAGEMENT, err_msg);
277
278 if (ret != JVMFlag::SUCCESS) {
279 output()->print_cr("%s", err_msg.buffer());
280 }
281 }
282
283 int SetVMFlagDCmd::num_arguments() {
284 ResourceMark rm;
285 SetVMFlagDCmd* dcmd = new SetVMFlagDCmd(NULL, false);
286 if (dcmd != NULL) {
287 DCmdMark mark(dcmd);
288 return dcmd->_dcmdparser.num_arguments();
289 } else {
290 return 0;
291 }
292 }
293
294 void JVMTIDataDumpDCmd::execute(DCmdSource source, TRAPS) {
295 if (JvmtiExport::should_post_data_dump()) {
296 JvmtiExport::post_data_dump();
297 }
298 }
299
300 #if INCLUDE_SERVICES
301 JVMTIAgentLoadDCmd::JVMTIAgentLoadDCmd(outputStream* output, bool heap) :
302 DCmdWithParser(output, heap),
303 _libpath("library path", "Absolute path of the JVMTI agent to load.",
304 "STRING", true),
305 _option("agent option", "Option string to pass the agent.", "STRING", false) {
306 _dcmdparser.add_dcmd_argument(&_libpath);
307 _dcmdparser.add_dcmd_argument(&_option);
308 }
309
310 void JVMTIAgentLoadDCmd::execute(DCmdSource source, TRAPS) {
311
312 if (_libpath.value() == NULL) {
313 output()->print_cr("JVMTI.agent_load dcmd needs library path.");
314 return;
315 }
316
317 char *suffix = strrchr(_libpath.value(), '.');
318 bool is_java_agent = (suffix != NULL) && (strncmp(".jar", suffix, 4) == 0);
319
320 if (is_java_agent) {
321 if (_option.value() == NULL) {
322 JvmtiExport::load_agent_library("instrument", "false",
323 _libpath.value(), output());
324 } else {
325 size_t opt_len = strlen(_libpath.value()) + strlen(_option.value()) + 2;
326 if (opt_len > 4096) {
327 output()->print_cr("JVMTI agent attach failed: Options is too long.");
328 return;
329 }
330
331 char *opt = (char *)os::malloc(opt_len, mtInternal);
332 if (opt == NULL) {
333 output()->print_cr("JVMTI agent attach failed: "
334 "Could not allocate " SIZE_FORMAT " bytes for argument.",
335 opt_len);
336 return;
337 }
338
339 jio_snprintf(opt, opt_len, "%s=%s", _libpath.value(), _option.value());
340 JvmtiExport::load_agent_library("instrument", "false", opt, output());
341
342 os::free(opt);
343 }
344 } else {
345 JvmtiExport::load_agent_library(_libpath.value(), "true",
346 _option.value(), output());
347 }
348 }
349
350 int JVMTIAgentLoadDCmd::num_arguments() {
351 ResourceMark rm;
352 JVMTIAgentLoadDCmd* dcmd = new JVMTIAgentLoadDCmd(NULL, false);
353 if (dcmd != NULL) {
354 DCmdMark mark(dcmd);
355 return dcmd->_dcmdparser.num_arguments();
356 } else {
357 return 0;
358 }
359 }
360 #endif // INCLUDE_SERVICES
361
362 void PrintSystemPropertiesDCmd::execute(DCmdSource source, TRAPS) {
363 // load VMSupport
364 Symbol* klass = vmSymbols::jdk_internal_vm_VMSupport();
365 Klass* k = SystemDictionary::resolve_or_fail(klass, true, CHECK);
366 InstanceKlass* ik = InstanceKlass::cast(k);
367 if (ik->should_be_initialized()) {
368 ik->initialize(THREAD);
369 }
370 if (HAS_PENDING_EXCEPTION) {
371 java_lang_Throwable::print(PENDING_EXCEPTION, output());
372 output()->cr();
373 CLEAR_PENDING_EXCEPTION;
374 return;
375 }
376
377 // invoke the serializePropertiesToByteArray method
378 JavaValue result(T_OBJECT);
379 JavaCallArguments args;
380
381 Symbol* signature = vmSymbols::serializePropertiesToByteArray_signature();
382 JavaCalls::call_static(&result,
383 ik,
384 vmSymbols::serializePropertiesToByteArray_name(),
385 signature,
386 &args,
387 THREAD);
388 if (HAS_PENDING_EXCEPTION) {
389 java_lang_Throwable::print(PENDING_EXCEPTION, output());
390 output()->cr();
391 CLEAR_PENDING_EXCEPTION;
392 return;
393 }
394
395 // The result should be a [B
396 oop res = (oop)result.get_jobject();
397 assert(res->is_typeArray(), "just checking");
398 assert(TypeArrayKlass::cast(res->klass())->element_type() == T_BYTE, "just checking");
399
400 // copy the bytes to the output stream
401 typeArrayOop ba = typeArrayOop(res);
402 jbyte* addr = typeArrayOop(res)->byte_at_addr(0);
403 output()->print_raw((const char*)addr, ba->length());
404 }
405
406 VMUptimeDCmd::VMUptimeDCmd(outputStream* output, bool heap) :
407 DCmdWithParser(output, heap),
408 _date("-date", "Add a prefix with current date", "BOOLEAN", false, "false") {
409 _dcmdparser.add_dcmd_option(&_date);
410 }
411
412 void VMUptimeDCmd::execute(DCmdSource source, TRAPS) {
413 if (_date.value()) {
414 output()->date_stamp(true, "", ": ");
415 }
416 output()->time_stamp().update_to(tty->time_stamp().ticks());
417 output()->stamp();
418 output()->print_cr(" s");
419 }
420
421 int VMUptimeDCmd::num_arguments() {
422 ResourceMark rm;
423 VMUptimeDCmd* dcmd = new VMUptimeDCmd(NULL, false);
424 if (dcmd != NULL) {
425 DCmdMark mark(dcmd);
426 return dcmd->_dcmdparser.num_arguments();
427 } else {
428 return 0;
429 }
430 }
431
432 void VMInfoDCmd::execute(DCmdSource source, TRAPS) {
433 VMError::print_vm_info(_output);
434 }
435
436 void SystemGCDCmd::execute(DCmdSource source, TRAPS) {
437 Universe::heap()->collect(GCCause::_dcmd_gc_run);
438 }
439
440 void RunFinalizationDCmd::execute(DCmdSource source, TRAPS) {
441 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_System(),
442 true, CHECK);
443 JavaValue result(T_VOID);
444 JavaCalls::call_static(&result, k,
445 vmSymbols::run_finalization_name(),
446 vmSymbols::void_method_signature(), CHECK);
447 }
448
449 void HeapInfoDCmd::execute(DCmdSource source, TRAPS) {
450 MutexLocker hl(Heap_lock);
451 Universe::heap()->print_on(output());
452 }
453
454 void FinalizerInfoDCmd::execute(DCmdSource source, TRAPS) {
455 ResourceMark rm;
456
457 Klass* k = SystemDictionary::resolve_or_fail(
458 vmSymbols::finalizer_histogram_klass(), true, CHECK);
459
460 JavaValue result(T_ARRAY);
461
462 // We are calling lang.ref.FinalizerHistogram.getFinalizerHistogram() method
463 // and expect it to return array of FinalizerHistogramEntry as Object[]
464
465 JavaCalls::call_static(&result, k,
466 vmSymbols::get_finalizer_histogram_name(),
467 vmSymbols::void_finalizer_histogram_entry_array_signature(), CHECK);
468
469 objArrayOop result_oop = (objArrayOop) result.get_jobject();
470 if (result_oop->length() == 0) {
471 output()->print_cr("No instances waiting for finalization found");
472 return;
473 }
474
475 oop foop = result_oop->obj_at(0);
476 InstanceKlass* ik = InstanceKlass::cast(foop->klass());
477
478 fieldDescriptor count_fd, name_fd;
479
480 Klass* count_res = ik->find_field(
481 vmSymbols::finalizer_histogram_entry_count_field(), vmSymbols::int_signature(), &count_fd);
482
483 Klass* name_res = ik->find_field(
484 vmSymbols::finalizer_histogram_entry_name_field(), vmSymbols::string_signature(), &name_fd);
485
486 assert(count_res != NULL && name_res != NULL, "Unexpected layout of FinalizerHistogramEntry");
487
488 output()->print_cr("Unreachable instances waiting for finalization");
489 output()->print_cr("#instances class name");
490 output()->print_cr("-----------------------");
491
492 for (int i = 0; i < result_oop->length(); ++i) {
493 oop element_oop = result_oop->obj_at(i);
494 oop str_oop = element_oop->obj_field(name_fd.offset());
495 char *name = java_lang_String::as_utf8_string(str_oop);
496 int count = element_oop->int_field(count_fd.offset());
497 output()->print_cr("%10d %s", count, name);
498 }
499 }
500
501 #if INCLUDE_SERVICES // Heap dumping/inspection supported
502 HeapDumpDCmd::HeapDumpDCmd(outputStream* output, bool heap) :
503 DCmdWithParser(output, heap),
504 _filename("filename","Name of the dump file", "STRING",true),
505 _all("-all", "Dump all objects, including unreachable objects",
506 "BOOLEAN", false, "false") {
507 _dcmdparser.add_dcmd_option(&_all);
508 _dcmdparser.add_dcmd_argument(&_filename);
509 }
510
511 void HeapDumpDCmd::execute(DCmdSource source, TRAPS) {
512 // Request a full GC before heap dump if _all is false
513 // This helps reduces the amount of unreachable objects in the dump
514 // and makes it easier to browse.
515 HeapDumper dumper(!_all.value() /* request GC if _all is false*/);
516 int res = dumper.dump(_filename.value());
517 if (res == 0) {
518 output()->print_cr("Heap dump file created");
519 } else {
520 // heap dump failed
521 ResourceMark rm;
522 char* error = dumper.error_as_C_string();
523 if (error == NULL) {
524 output()->print_cr("Dump failed - reason unknown");
525 } else {
526 output()->print_cr("%s", error);
527 }
528 }
529 }
530
531 int HeapDumpDCmd::num_arguments() {
532 ResourceMark rm;
533 HeapDumpDCmd* dcmd = new HeapDumpDCmd(NULL, false);
534 if (dcmd != NULL) {
535 DCmdMark mark(dcmd);
536 return dcmd->_dcmdparser.num_arguments();
537 } else {
538 return 0;
539 }
540 }
541
542 ClassHistogramDCmd::ClassHistogramDCmd(outputStream* output, bool heap) :
543 DCmdWithParser(output, heap),
544 _all("-all", "Inspect all objects, including unreachable objects",
545 "BOOLEAN", false, "false") {
546 _dcmdparser.add_dcmd_option(&_all);
547 }
548
549 void ClassHistogramDCmd::execute(DCmdSource source, TRAPS) {
550 VM_GC_HeapInspection heapop(output(),
551 !_all.value() /* request full gc if false */);
552 VMThread::execute(&heapop);
553 }
554
555 int ClassHistogramDCmd::num_arguments() {
556 ResourceMark rm;
557 ClassHistogramDCmd* dcmd = new ClassHistogramDCmd(NULL, false);
558 if (dcmd != NULL) {
559 DCmdMark mark(dcmd);
560 return dcmd->_dcmdparser.num_arguments();
561 } else {
562 return 0;
563 }
564 }
565
566 #define DEFAULT_COLUMNS "InstBytes,KlassBytes,CpAll,annotations,MethodCount,Bytecodes,MethodAll,ROAll,RWAll,Total"
567 ClassStatsDCmd::ClassStatsDCmd(outputStream* output, bool heap) :
568 DCmdWithParser(output, heap),
569 _all("-all", "Show all columns",
570 "BOOLEAN", false, "false"),
571 _csv("-csv", "Print in CSV (comma-separated values) format for spreadsheets",
572 "BOOLEAN", false, "false"),
573 _help("-help", "Show meaning of all the columns",
574 "BOOLEAN", false, "false"),
575 _columns("columns", "Comma-separated list of all the columns to show. "
576 "If not specified, the following columns are shown: " DEFAULT_COLUMNS,
577 "STRING", false) {
578 _dcmdparser.add_dcmd_option(&_all);
579 _dcmdparser.add_dcmd_option(&_csv);
580 _dcmdparser.add_dcmd_option(&_help);
581 _dcmdparser.add_dcmd_argument(&_columns);
582 }
583
584 void ClassStatsDCmd::execute(DCmdSource source, TRAPS) {
585 VM_GC_HeapInspection heapop(output(),
586 true /* request_full_gc */);
587 heapop.set_csv_format(_csv.value());
588 heapop.set_print_help(_help.value());
589 heapop.set_print_class_stats(true);
590 if (_all.value()) {
591 if (_columns.has_value()) {
592 output()->print_cr("Cannot specify -all and individual columns at the same time");
593 return;
594 } else {
595 heapop.set_columns(NULL);
596 }
597 } else {
598 if (_columns.has_value()) {
599 heapop.set_columns(_columns.value());
600 } else {
601 heapop.set_columns(DEFAULT_COLUMNS);
602 }
603 }
604 VMThread::execute(&heapop);
605 }
606
607 int ClassStatsDCmd::num_arguments() {
608 ResourceMark rm;
609 ClassStatsDCmd* dcmd = new ClassStatsDCmd(NULL, false);
610 if (dcmd != NULL) {
611 DCmdMark mark(dcmd);
612 return dcmd->_dcmdparser.num_arguments();
613 } else {
614 return 0;
615 }
616 }
617 #endif // INCLUDE_SERVICES
618
619 ThreadDumpDCmd::ThreadDumpDCmd(outputStream* output, bool heap) :
620 DCmdWithParser(output, heap),
621 _locks("-l", "print java.util.concurrent locks", "BOOLEAN", false, "false"),
622 _extended("-e", "print extended thread information", "BOOLEAN", false, "false") {
623 _dcmdparser.add_dcmd_option(&_locks);
624 _dcmdparser.add_dcmd_option(&_extended);
625 }
626
627 void ThreadDumpDCmd::execute(DCmdSource source, TRAPS) {
628 // thread stacks
629 VM_PrintThreads op1(output(), _locks.value(), _extended.value());
630 VMThread::execute(&op1);
631
632 // JNI global handles
633 VM_PrintJNI op2(output());
634 VMThread::execute(&op2);
635
636 // Deadlock detection
637 VM_FindDeadlocks op3(output());
638 VMThread::execute(&op3);
639 }
640
641 int ThreadDumpDCmd::num_arguments() {
642 ResourceMark rm;
643 ThreadDumpDCmd* dcmd = new ThreadDumpDCmd(NULL, false);
644 if (dcmd != NULL) {
645 DCmdMark mark(dcmd);
646 return dcmd->_dcmdparser.num_arguments();
647 } else {
648 return 0;
649 }
650 }
651
652 // Enhanced JMX Agent support
653
654 JMXStartRemoteDCmd::JMXStartRemoteDCmd(outputStream *output, bool heap_allocated) :
655
656 DCmdWithParser(output, heap_allocated),
657
658 _config_file
659 ("config.file",
660 "set com.sun.management.config.file", "STRING", false),
661
662 _jmxremote_host
663 ("jmxremote.host",
664 "set com.sun.management.jmxremote.host", "STRING", false),
665
666 _jmxremote_port
667 ("jmxremote.port",
668 "set com.sun.management.jmxremote.port", "STRING", false),
669
670 _jmxremote_rmi_port
671 ("jmxremote.rmi.port",
672 "set com.sun.management.jmxremote.rmi.port", "STRING", false),
673
674 _jmxremote_ssl
675 ("jmxremote.ssl",
676 "set com.sun.management.jmxremote.ssl", "STRING", false),
677
678 _jmxremote_registry_ssl
679 ("jmxremote.registry.ssl",
680 "set com.sun.management.jmxremote.registry.ssl", "STRING", false),
681
682 _jmxremote_authenticate
683 ("jmxremote.authenticate",
684 "set com.sun.management.jmxremote.authenticate", "STRING", false),
685
686 _jmxremote_password_file
687 ("jmxremote.password.file",
688 "set com.sun.management.jmxremote.password.file", "STRING", false),
689
690 _jmxremote_access_file
691 ("jmxremote.access.file",
692 "set com.sun.management.jmxremote.access.file", "STRING", false),
693
694 _jmxremote_login_config
695 ("jmxremote.login.config",
696 "set com.sun.management.jmxremote.login.config", "STRING", false),
697
698 _jmxremote_ssl_enabled_cipher_suites
699 ("jmxremote.ssl.enabled.cipher.suites",
700 "set com.sun.management.jmxremote.ssl.enabled.cipher.suite", "STRING", false),
701
702 _jmxremote_ssl_enabled_protocols
703 ("jmxremote.ssl.enabled.protocols",
704 "set com.sun.management.jmxremote.ssl.enabled.protocols", "STRING", false),
705
706 _jmxremote_ssl_need_client_auth
707 ("jmxremote.ssl.need.client.auth",
708 "set com.sun.management.jmxremote.need.client.auth", "STRING", false),
709
710 _jmxremote_ssl_config_file
711 ("jmxremote.ssl.config.file",
712 "set com.sun.management.jmxremote.ssl_config_file", "STRING", false),
713
714 // JDP Protocol support
715 _jmxremote_autodiscovery
716 ("jmxremote.autodiscovery",
717 "set com.sun.management.jmxremote.autodiscovery", "STRING", false),
718
719 _jdp_port
720 ("jdp.port",
721 "set com.sun.management.jdp.port", "INT", false),
722
723 _jdp_address
724 ("jdp.address",
725 "set com.sun.management.jdp.address", "STRING", false),
726
727 _jdp_source_addr
728 ("jdp.source_addr",
729 "set com.sun.management.jdp.source_addr", "STRING", false),
730
731 _jdp_ttl
732 ("jdp.ttl",
733 "set com.sun.management.jdp.ttl", "INT", false),
734
735 _jdp_pause
736 ("jdp.pause",
737 "set com.sun.management.jdp.pause", "INT", false),
738
739 _jdp_name
740 ("jdp.name",
741 "set com.sun.management.jdp.name", "STRING", false)
742
743 {
744 _dcmdparser.add_dcmd_option(&_config_file);
745 _dcmdparser.add_dcmd_option(&_jmxremote_host);
746 _dcmdparser.add_dcmd_option(&_jmxremote_port);
747 _dcmdparser.add_dcmd_option(&_jmxremote_rmi_port);
748 _dcmdparser.add_dcmd_option(&_jmxremote_ssl);
749 _dcmdparser.add_dcmd_option(&_jmxremote_registry_ssl);
750 _dcmdparser.add_dcmd_option(&_jmxremote_authenticate);
751 _dcmdparser.add_dcmd_option(&_jmxremote_password_file);
752 _dcmdparser.add_dcmd_option(&_jmxremote_access_file);
753 _dcmdparser.add_dcmd_option(&_jmxremote_login_config);
754 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_enabled_cipher_suites);
755 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_enabled_protocols);
756 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_need_client_auth);
757 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_config_file);
758 _dcmdparser.add_dcmd_option(&_jmxremote_autodiscovery);
759 _dcmdparser.add_dcmd_option(&_jdp_port);
760 _dcmdparser.add_dcmd_option(&_jdp_address);
761 _dcmdparser.add_dcmd_option(&_jdp_source_addr);
762 _dcmdparser.add_dcmd_option(&_jdp_ttl);
763 _dcmdparser.add_dcmd_option(&_jdp_pause);
764 _dcmdparser.add_dcmd_option(&_jdp_name);
765 }
766
767
768 int JMXStartRemoteDCmd::num_arguments() {
769 ResourceMark rm;
770 JMXStartRemoteDCmd* dcmd = new JMXStartRemoteDCmd(NULL, false);
771 if (dcmd != NULL) {
772 DCmdMark mark(dcmd);
773 return dcmd->_dcmdparser.num_arguments();
774 } else {
775 return 0;
776 }
777 }
778
779
780 void JMXStartRemoteDCmd::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 startRemoteManagementAgent(string) method to start
786 // the remote management server.
787 // throw java.lang.NoSuchMethodError if the 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
795 // Pass all command line arguments to java as key=value,...
796 // All checks are done on java side
797
798 int len = 0;
799 stringStream options;
800 char comma[2] = {0,0};
801
802 // Leave default values on Agent.class side and pass only
803 // agruments explicitly set by user. All arguments passed
804 // to jcmd override properties with the same name set by
805 // command line with -D or by managmenent.properties
806 // file.
807 #define PUT_OPTION(a) \
808 do { \
809 if ( (a).is_set() ){ \
810 if ( *((a).type()) == 'I' ) { \
811 options.print("%scom.sun.management.%s=" JLONG_FORMAT, comma, (a).name(), (jlong)((a).value())); \
812 } else { \
813 options.print("%scom.sun.management.%s=%s", comma, (a).name(), (char*)((a).value())); \
814 } \
815 comma[0] = ','; \
816 }\
817 } while(0);
818
819
820 PUT_OPTION(_config_file);
821 PUT_OPTION(_jmxremote_host);
822 PUT_OPTION(_jmxremote_port);
823 PUT_OPTION(_jmxremote_rmi_port);
824 PUT_OPTION(_jmxremote_ssl);
825 PUT_OPTION(_jmxremote_registry_ssl);
826 PUT_OPTION(_jmxremote_authenticate);
827 PUT_OPTION(_jmxremote_password_file);
828 PUT_OPTION(_jmxremote_access_file);
829 PUT_OPTION(_jmxremote_login_config);
830 PUT_OPTION(_jmxremote_ssl_enabled_cipher_suites);
831 PUT_OPTION(_jmxremote_ssl_enabled_protocols);
832 PUT_OPTION(_jmxremote_ssl_need_client_auth);
833 PUT_OPTION(_jmxremote_ssl_config_file);
834 PUT_OPTION(_jmxremote_autodiscovery);
835 PUT_OPTION(_jdp_port);
836 PUT_OPTION(_jdp_address);
837 PUT_OPTION(_jdp_source_addr);
838 PUT_OPTION(_jdp_ttl);
839 PUT_OPTION(_jdp_pause);
840 PUT_OPTION(_jdp_name);
841
842 #undef PUT_OPTION
843
844 Handle str = java_lang_String::create_from_str(options.as_string(), CHECK);
845 JavaCalls::call_static(&result, k, vmSymbols::startRemoteAgent_name(), vmSymbols::string_void_signature(), str, CHECK);
846 }
847
848 JMXStartLocalDCmd::JMXStartLocalDCmd(outputStream *output, bool heap_allocated) :
849 DCmd(output, heap_allocated) {
850 // do nothing
851 }
852
853 void JMXStartLocalDCmd::execute(DCmdSource source, TRAPS) {
854 ResourceMark rm(THREAD);
855 HandleMark hm(THREAD);
856
857 // Load and initialize the jdk.internal.agent.Agent class
858 // invoke startLocalManagementAgent(void) method to start
859 // the local management server
860 // throw java.lang.NoSuchMethodError if method doesn't exist
861
862 loadAgentModule(CHECK);
863 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
864 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::jdk_internal_agent_Agent(), loader, Handle(), true, CHECK);
865
866 JavaValue result(T_VOID);
867 JavaCalls::call_static(&result, k, vmSymbols::startLocalAgent_name(), vmSymbols::void_method_signature(), CHECK);
868 }
869
870 void JMXStopRemoteDCmd::execute(DCmdSource source, TRAPS) {
871 ResourceMark rm(THREAD);
872 HandleMark hm(THREAD);
873
874 // Load and initialize the jdk.internal.agent.Agent class
875 // invoke stopRemoteManagementAgent method to stop the
876 // management server
877 // throw java.lang.NoSuchMethodError if method doesn't exist
878
879 loadAgentModule(CHECK);
880 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
881 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::jdk_internal_agent_Agent(), loader, Handle(), true, CHECK);
882
883 JavaValue result(T_VOID);
884 JavaCalls::call_static(&result, k, vmSymbols::stopRemoteAgent_name(), vmSymbols::void_method_signature(), CHECK);
885 }
886
887 JMXStatusDCmd::JMXStatusDCmd(outputStream *output, bool heap_allocated) :
888 DCmd(output, heap_allocated) {
889 // do nothing
890 }
891
892 void JMXStatusDCmd::execute(DCmdSource source, TRAPS) {
893 ResourceMark rm(THREAD);
894 HandleMark hm(THREAD);
895
896 // Load and initialize the jdk.internal.agent.Agent class
897 // invoke getManagementAgentStatus() method to generate the status info
898 // throw java.lang.NoSuchMethodError if method doesn't exist
899
900 loadAgentModule(CHECK);
901 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
902 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::jdk_internal_agent_Agent(), loader, Handle(), true, CHECK);
903
904 JavaValue result(T_OBJECT);
905 JavaCalls::call_static(&result, k, vmSymbols::getAgentStatus_name(), vmSymbols::void_string_signature(), CHECK);
906
907 jvalue* jv = (jvalue*) result.get_value_addr();
908 oop str = (oop) jv->l;
909 if (str != NULL) {
910 char* out = java_lang_String::as_utf8_string(str);
911 if (out) {
912 output()->print_cr("%s", out);
913 return;
914 }
915 }
916 output()->print_cr("Error obtaining management agent status");
917 }
918
919 VMDynamicLibrariesDCmd::VMDynamicLibrariesDCmd(outputStream *output, bool heap_allocated) :
920 DCmd(output, heap_allocated) {
921 // do nothing
922 }
923
924 void VMDynamicLibrariesDCmd::execute(DCmdSource source, TRAPS) {
925 os::print_dll_info(output());
926 output()->cr();
927 }
928
929 void CompileQueueDCmd::execute(DCmdSource source, TRAPS) {
930 VM_PrintCompileQueue printCompileQueueOp(output());
931 VMThread::execute(&printCompileQueueOp);
932 }
933
934 void CodeListDCmd::execute(DCmdSource source, TRAPS) {
935 CodeCache::print_codelist(output());
936 }
937
938 void CodeCacheDCmd::execute(DCmdSource source, TRAPS) {
939 CodeCache::print_layout(output());
940 }
941
942 //---< BEGIN >--- CodeHeap State Analytics.
943 CodeHeapAnalyticsDCmd::CodeHeapAnalyticsDCmd(outputStream* output, bool heap) :
944 DCmdWithParser(output, heap),
945 _function("function", "Function to be performed (aggregate, UsedSpace, FreeSpace, MethodCount, MethodSpace, MethodAge, MethodNames, discard", "STRING", false, "all"),
946 _granularity("granularity", "Detail level - smaller value -> more detail", "STRING", false, "4096") {
947 _dcmdparser.add_dcmd_argument(&_function);
948 _dcmdparser.add_dcmd_argument(&_granularity);
949 }
950
951 void CodeHeapAnalyticsDCmd::execute(DCmdSource source, TRAPS) {
952 CompileBroker::print_heapinfo(output(), _function.value(), _granularity.value());
953 }
954
955 int CodeHeapAnalyticsDCmd::num_arguments() {
956 ResourceMark rm;
957 CodeHeapAnalyticsDCmd* dcmd = new CodeHeapAnalyticsDCmd(NULL, false);
958 if (dcmd != NULL) {
959 DCmdMark mark(dcmd);
960 return dcmd->_dcmdparser.num_arguments();
961 } else {
962 return 0;
963 }
964 }
965 //---< END >--- CodeHeap State Analytics.
966
967 void CompilerDirectivesPrintDCmd::execute(DCmdSource source, TRAPS) {
968 DirectivesStack::print(output());
969 }
970
971 CompilerDirectivesAddDCmd::CompilerDirectivesAddDCmd(outputStream* output, bool heap) :
972 DCmdWithParser(output, heap),
973 _filename("filename","Name of the directives file", "STRING",true) {
974 _dcmdparser.add_dcmd_argument(&_filename);
975 }
976
977 void CompilerDirectivesAddDCmd::execute(DCmdSource source, TRAPS) {
978 DirectivesParser::parse_from_file(_filename.value(), output());
979 }
980
981 int CompilerDirectivesAddDCmd::num_arguments() {
982 ResourceMark rm;
983 CompilerDirectivesAddDCmd* dcmd = new CompilerDirectivesAddDCmd(NULL, false);
984 if (dcmd != NULL) {
985 DCmdMark mark(dcmd);
986 return dcmd->_dcmdparser.num_arguments();
987 } else {
988 return 0;
989 }
990 }
991
992 void CompilerDirectivesRemoveDCmd::execute(DCmdSource source, TRAPS) {
993 DirectivesStack::pop(1);
994 }
995
996 void CompilerDirectivesClearDCmd::execute(DCmdSource source, TRAPS) {
997 DirectivesStack::clear();
998 }
999 #if INCLUDE_SERVICES
1000 ClassHierarchyDCmd::ClassHierarchyDCmd(outputStream* output, bool heap) :
1001 DCmdWithParser(output, heap),
1002 _print_interfaces("-i", "Inherited interfaces should be printed.", "BOOLEAN", false, "false"),
1003 _print_subclasses("-s", "If a classname is specified, print its subclasses. "
1004 "Otherwise only its superclasses are printed.", "BOOLEAN", false, "false"),
1005 _classname("classname", "Name of class whose hierarchy should be printed. "
1006 "If not specified, all class hierarchies are printed.",
1007 "STRING", false) {
1008 _dcmdparser.add_dcmd_option(&_print_interfaces);
1009 _dcmdparser.add_dcmd_option(&_print_subclasses);
1010 _dcmdparser.add_dcmd_argument(&_classname);
1011 }
1012
1013 void ClassHierarchyDCmd::execute(DCmdSource source, TRAPS) {
1014 VM_PrintClassHierarchy printClassHierarchyOp(output(), _print_interfaces.value(),
1015 _print_subclasses.value(), _classname.value());
1016 VMThread::execute(&printClassHierarchyOp);
1017 }
1018
1019 int ClassHierarchyDCmd::num_arguments() {
1020 ResourceMark rm;
1021 ClassHierarchyDCmd* dcmd = new ClassHierarchyDCmd(NULL, false);
1022 if (dcmd != NULL) {
1023 DCmdMark mark(dcmd);
1024 return dcmd->_dcmdparser.num_arguments();
1025 } else {
1026 return 0;
1027 }
1028 }
1029
1030 #endif
1031
1032 class VM_DumpTouchedMethods : public VM_Operation {
1033 private:
1034 outputStream* _out;
1035 public:
1036 VM_DumpTouchedMethods(outputStream* out) {
1037 _out = out;
1038 }
1039
1040 virtual VMOp_Type type() const { return VMOp_DumpTouchedMethods; }
1041
1042 virtual void doit() {
1043 Method::print_touched_methods(_out);
1044 }
1045 };
1046
1047 TouchedMethodsDCmd::TouchedMethodsDCmd(outputStream* output, bool heap) :
1048 DCmdWithParser(output, heap)
1049 {}
1050
1051 void TouchedMethodsDCmd::execute(DCmdSource source, TRAPS) {
1052 if (!LogTouchedMethods) {
1053 output()->print_cr("VM.print_touched_methods command requires -XX:+LogTouchedMethods");
1054 return;
1055 }
1056 VM_DumpTouchedMethods dumper(output());
1057 VMThread::execute(&dumper);
1058 }
1059
1060 int TouchedMethodsDCmd::num_arguments() {
1061 return 0;
1062 }
1063
1064 #if INCLUDE_JVMTI
1065 extern "C" typedef char const* (JNICALL *debugInit_startDebuggingViaCommandPtr)(JNIEnv* env, jthread thread, char const** transport_name,
1066 char const** address, jboolean* first_start);
1067 static debugInit_startDebuggingViaCommandPtr dvc_start_ptr = NULL;
1068
1069 DebugOnCmdStartDCmd::DebugOnCmdStartDCmd(outputStream* output, bool heap) : DCmdWithParser(output, heap) {
1070 }
1071
1072 void DebugOnCmdStartDCmd::execute(DCmdSource source, TRAPS) {
1073 char const* transport = NULL;
1074 char const* addr = NULL;
1075 jboolean is_first_start = JNI_FALSE;
1076 JavaThread* thread = (JavaThread*) THREAD;
1077 jthread jt = JNIHandles::make_local(thread->threadObj());
1078 ThreadToNativeFromVM ttn(thread);
1079 const char *error = "Could not find jdwp agent.";
1080
1081 if (!dvc_start_ptr) {
1082 for (AgentLibrary* agent = Arguments::agents(); agent != NULL; agent = agent->next()) {
1083 if ((strcmp("jdwp", agent->name()) == 0) && (dvc_start_ptr == NULL)) {
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 != NULL) {
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