Fri, 01 Feb 2013 23:48:08 +0100
8005012: Add WB APIs to better support NMT testing
Summary: Add WB API functions to enable better NMT testing
Reviewed-by: dholmes, zgu
1 /*
2 * Copyright (c) 2011, 2013, 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 */
25 #include "precompiled.hpp"
26 #include "gc_implementation/shared/vmGCOperations.hpp"
27 #include "runtime/javaCalls.hpp"
28 #include "services/diagnosticArgument.hpp"
29 #include "services/diagnosticCommand.hpp"
30 #include "services/diagnosticFramework.hpp"
31 #include "services/heapDumper.hpp"
32 #include "services/management.hpp"
34 void DCmdRegistrant::register_dcmds(){
35 // Registration of the diagnostic commands
36 // First boolean argument specifies if the command is enabled
37 // Second boolean argument specifies if the command is hidden
38 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<HelpDCmd>(true, false));
39 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VersionDCmd>(true, false));
40 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<CommandLineDCmd>(true, false));
41 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<PrintSystemPropertiesDCmd>(true, false));
42 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<PrintVMFlagsDCmd>(true, false));
43 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VMUptimeDCmd>(true, false));
44 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SystemGCDCmd>(true, false));
45 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<RunFinalizationDCmd>(true, false));
46 #if INCLUDE_SERVICES // Heap dumping/inspection supported
47 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<HeapDumpDCmd>(true, false));
48 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassHistogramDCmd>(true, false));
49 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassStatsDCmd>(true, false));
50 #endif // INCLUDE_SERVICES
51 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ThreadDumpDCmd>(true, false));
52 //Enhanced JMX Agent Support
53 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStartRemoteDCmd>(true,false));
54 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStartLocalDCmd>(true,false));
55 DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStopRemoteDCmd>(true,false));
57 }
59 #ifndef HAVE_EXTRA_DCMD
60 void DCmdRegistrant::register_dcmds_ext(){
61 // Do nothing here
62 }
63 #endif
66 HelpDCmd::HelpDCmd(outputStream* output, bool heap) : DCmdWithParser(output, heap),
67 _all("-all", "Show help for all commands", "BOOLEAN", false, "false"),
68 _cmd("command name", "The name of the command for which we want help",
69 "STRING", false) {
70 _dcmdparser.add_dcmd_option(&_all);
71 _dcmdparser.add_dcmd_argument(&_cmd);
72 };
74 void HelpDCmd::execute(TRAPS) {
75 if (_all.value()) {
76 GrowableArray<const char*>* cmd_list = DCmdFactory::DCmd_list();
77 for (int i = 0; i < cmd_list->length(); i++) {
78 DCmdFactory* factory = DCmdFactory::factory(cmd_list->at(i),
79 strlen(cmd_list->at(i)));
80 if (!factory->is_hidden()) {
81 output()->print_cr("%s%s", factory->name(),
82 factory->is_enabled() ? "" : " [disabled]");
83 output()->print_cr("\t%s", factory->description());
84 output()->cr();
85 }
86 factory = factory->next();
87 }
88 } else if (_cmd.has_value()) {
89 DCmd* cmd = NULL;
90 DCmdFactory* factory = DCmdFactory::factory(_cmd.value(),
91 strlen(_cmd.value()));
92 if (factory != NULL) {
93 output()->print_cr("%s%s", factory->name(),
94 factory->is_enabled() ? "" : " [disabled]");
95 output()->print_cr(factory->description());
96 output()->print_cr("\nImpact: %s", factory->impact());
97 output()->cr();
98 cmd = factory->create_resource_instance(output());
99 if (cmd != NULL) {
100 DCmdMark mark(cmd);
101 cmd->print_help(factory->name());
102 }
103 } else {
104 output()->print_cr("Help unavailable : '%s' : No such command", _cmd.value());
105 }
106 } else {
107 output()->print_cr("The following commands are available:");
108 GrowableArray<const char *>* cmd_list = DCmdFactory::DCmd_list();
109 for (int i = 0; i < cmd_list->length(); i++) {
110 DCmdFactory* factory = DCmdFactory::factory(cmd_list->at(i),
111 strlen(cmd_list->at(i)));
112 if (!factory->is_hidden()) {
113 output()->print_cr("%s%s", factory->name(),
114 factory->is_enabled() ? "" : " [disabled]");
115 }
116 factory = factory->_next;
117 }
118 output()->print_cr("\nFor more information about a specific command use 'help <command>'.");
119 }
120 }
122 int HelpDCmd::num_arguments() {
123 ResourceMark rm;
124 HelpDCmd* dcmd = new HelpDCmd(NULL, false);
125 if (dcmd != NULL) {
126 DCmdMark mark(dcmd);
127 return dcmd->_dcmdparser.num_arguments();
128 } else {
129 return 0;
130 }
131 }
133 void VersionDCmd::execute(TRAPS) {
134 output()->print_cr("%s version %s", Abstract_VM_Version::vm_name(),
135 Abstract_VM_Version::vm_release());
136 JDK_Version jdk_version = JDK_Version::current();
137 if (jdk_version.update_version() > 0) {
138 output()->print_cr("JDK %d.%d_%02d", jdk_version.major_version(),
139 jdk_version.minor_version(), jdk_version.update_version());
140 } else {
141 output()->print_cr("JDK %d.%d", jdk_version.major_version(),
142 jdk_version.minor_version());
143 }
144 }
146 PrintVMFlagsDCmd::PrintVMFlagsDCmd(outputStream* output, bool heap) :
147 DCmdWithParser(output, heap),
148 _all("-all", "Print all flags supported by the VM", "BOOLEAN", false, "false") {
149 _dcmdparser.add_dcmd_option(&_all);
150 }
152 void PrintVMFlagsDCmd::execute(TRAPS) {
153 if (_all.value()) {
154 CommandLineFlags::printFlags(output(), true);
155 } else {
156 CommandLineFlags::printSetFlags(output());
157 }
158 }
160 int PrintVMFlagsDCmd::num_arguments() {
161 ResourceMark rm;
162 PrintVMFlagsDCmd* dcmd = new PrintVMFlagsDCmd(NULL, false);
163 if (dcmd != NULL) {
164 DCmdMark mark(dcmd);
165 return dcmd->_dcmdparser.num_arguments();
166 } else {
167 return 0;
168 }
169 }
171 void PrintSystemPropertiesDCmd::execute(TRAPS) {
172 // load sun.misc.VMSupport
173 Symbol* klass = vmSymbols::sun_misc_VMSupport();
174 Klass* k = SystemDictionary::resolve_or_fail(klass, true, CHECK);
175 instanceKlassHandle ik (THREAD, k);
176 if (ik->should_be_initialized()) {
177 ik->initialize(THREAD);
178 }
179 if (HAS_PENDING_EXCEPTION) {
180 java_lang_Throwable::print(PENDING_EXCEPTION, output());
181 output()->cr();
182 CLEAR_PENDING_EXCEPTION;
183 return;
184 }
186 // invoke the serializePropertiesToByteArray method
187 JavaValue result(T_OBJECT);
188 JavaCallArguments args;
190 Symbol* signature = vmSymbols::serializePropertiesToByteArray_signature();
191 JavaCalls::call_static(&result,
192 ik,
193 vmSymbols::serializePropertiesToByteArray_name(),
194 signature,
195 &args,
196 THREAD);
197 if (HAS_PENDING_EXCEPTION) {
198 java_lang_Throwable::print(PENDING_EXCEPTION, output());
199 output()->cr();
200 CLEAR_PENDING_EXCEPTION;
201 return;
202 }
204 // The result should be a [B
205 oop res = (oop)result.get_jobject();
206 assert(res->is_typeArray(), "just checking");
207 assert(TypeArrayKlass::cast(res->klass())->element_type() == T_BYTE, "just checking");
209 // copy the bytes to the output stream
210 typeArrayOop ba = typeArrayOop(res);
211 jbyte* addr = typeArrayOop(res)->byte_at_addr(0);
212 output()->print_raw((const char*)addr, ba->length());
213 }
215 VMUptimeDCmd::VMUptimeDCmd(outputStream* output, bool heap) :
216 DCmdWithParser(output, heap),
217 _date("-date", "Add a prefix with current date", "BOOLEAN", false, "false") {
218 _dcmdparser.add_dcmd_option(&_date);
219 }
221 void VMUptimeDCmd::execute(TRAPS) {
222 if (_date.value()) {
223 output()->date_stamp(true, "", ": ");
224 }
225 output()->time_stamp().update_to(tty->time_stamp().ticks());
226 output()->stamp();
227 output()->print_cr(" s");
228 }
230 int VMUptimeDCmd::num_arguments() {
231 ResourceMark rm;
232 VMUptimeDCmd* dcmd = new VMUptimeDCmd(NULL, false);
233 if (dcmd != NULL) {
234 DCmdMark mark(dcmd);
235 return dcmd->_dcmdparser.num_arguments();
236 } else {
237 return 0;
238 }
239 }
241 void SystemGCDCmd::execute(TRAPS) {
242 Universe::heap()->collect(GCCause::_java_lang_system_gc);
243 }
245 void RunFinalizationDCmd::execute(TRAPS) {
246 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_System(),
247 true, CHECK);
248 instanceKlassHandle klass(THREAD, k);
249 JavaValue result(T_VOID);
250 JavaCalls::call_static(&result, klass,
251 vmSymbols::run_finalization_name(),
252 vmSymbols::void_method_signature(), CHECK);
253 }
255 #if INCLUDE_SERVICES // Heap dumping/inspection supported
256 HeapDumpDCmd::HeapDumpDCmd(outputStream* output, bool heap) :
257 DCmdWithParser(output, heap),
258 _filename("filename","Name of the dump file", "STRING",true),
259 _all("-all", "Dump all objects, including unreachable objects",
260 "BOOLEAN", false, "false") {
261 _dcmdparser.add_dcmd_option(&_all);
262 _dcmdparser.add_dcmd_argument(&_filename);
263 }
265 void HeapDumpDCmd::execute(TRAPS) {
266 // Request a full GC before heap dump if _all is false
267 // This helps reduces the amount of unreachable objects in the dump
268 // and makes it easier to browse.
269 HeapDumper dumper(!_all.value() /* request GC if _all is false*/);
270 int res = dumper.dump(_filename.value());
271 if (res == 0) {
272 output()->print_cr("Heap dump file created");
273 } else {
274 // heap dump failed
275 ResourceMark rm;
276 char* error = dumper.error_as_C_string();
277 if (error == NULL) {
278 output()->print_cr("Dump failed - reason unknown");
279 } else {
280 output()->print_cr("%s", error);
281 }
282 }
283 }
285 int HeapDumpDCmd::num_arguments() {
286 ResourceMark rm;
287 HeapDumpDCmd* dcmd = new HeapDumpDCmd(NULL, false);
288 if (dcmd != NULL) {
289 DCmdMark mark(dcmd);
290 return dcmd->_dcmdparser.num_arguments();
291 } else {
292 return 0;
293 }
294 }
296 ClassHistogramDCmd::ClassHistogramDCmd(outputStream* output, bool heap) :
297 DCmdWithParser(output, heap),
298 _all("-all", "Inspect all objects, including unreachable objects",
299 "BOOLEAN", false, "false") {
300 _dcmdparser.add_dcmd_option(&_all);
301 }
303 void ClassHistogramDCmd::execute(TRAPS) {
304 VM_GC_HeapInspection heapop(output(),
305 !_all.value() /* request full gc if false */,
306 true /* need_prologue */);
307 VMThread::execute(&heapop);
308 }
310 int ClassHistogramDCmd::num_arguments() {
311 ResourceMark rm;
312 ClassHistogramDCmd* dcmd = new ClassHistogramDCmd(NULL, false);
313 if (dcmd != NULL) {
314 DCmdMark mark(dcmd);
315 return dcmd->_dcmdparser.num_arguments();
316 } else {
317 return 0;
318 }
319 }
321 #define DEFAULT_COLUMNS "InstBytes,KlassBytes,CpAll,annotations,MethodCount,Bytecodes,MethodAll,ROAll,RWAll,Total"
322 ClassStatsDCmd::ClassStatsDCmd(outputStream* output, bool heap) :
323 DCmdWithParser(output, heap),
324 _csv("-csv", "Print in CSV (comma-separated values) format for spreadsheets",
325 "BOOLEAN", false, "false"),
326 _all("-all", "Show all columns",
327 "BOOLEAN", false, "false"),
328 _help("-help", "Show meaning of all the columns",
329 "BOOLEAN", false, "false"),
330 _columns("columns", "Comma-separated list of all the columns to show. "
331 "If not specified, the following columns are shown: " DEFAULT_COLUMNS,
332 "STRING", false) {
333 _dcmdparser.add_dcmd_option(&_all);
334 _dcmdparser.add_dcmd_option(&_csv);
335 _dcmdparser.add_dcmd_option(&_help);
336 _dcmdparser.add_dcmd_argument(&_columns);
337 }
339 void ClassStatsDCmd::execute(TRAPS) {
340 if (!UnlockDiagnosticVMOptions) {
341 output()->print_cr("GC.class_stats command requires -XX:+UnlockDiagnosticVMOptions");
342 return;
343 }
345 VM_GC_HeapInspection heapop(output(),
346 true, /* request_full_gc */
347 true /* need_prologue */);
348 heapop.set_csv_format(_csv.value());
349 heapop.set_print_help(_help.value());
350 heapop.set_print_class_stats(true);
351 if (_all.value()) {
352 if (_columns.has_value()) {
353 output()->print_cr("Cannot specify -all and individual columns at the same time");
354 return;
355 } else {
356 heapop.set_columns(NULL);
357 }
358 } else {
359 if (_columns.has_value()) {
360 heapop.set_columns(_columns.value());
361 } else {
362 heapop.set_columns(DEFAULT_COLUMNS);
363 }
364 }
365 VMThread::execute(&heapop);
366 }
368 int ClassStatsDCmd::num_arguments() {
369 ResourceMark rm;
370 ClassStatsDCmd* dcmd = new ClassStatsDCmd(NULL, false);
371 if (dcmd != NULL) {
372 DCmdMark mark(dcmd);
373 return dcmd->_dcmdparser.num_arguments();
374 } else {
375 return 0;
376 }
377 }
378 #endif // INCLUDE_SERVICES
380 ThreadDumpDCmd::ThreadDumpDCmd(outputStream* output, bool heap) :
381 DCmdWithParser(output, heap),
382 _locks("-l", "print java.util.concurrent locks", "BOOLEAN", false, "false") {
383 _dcmdparser.add_dcmd_option(&_locks);
384 }
386 void ThreadDumpDCmd::execute(TRAPS) {
387 // thread stacks
388 VM_PrintThreads op1(output(), _locks.value());
389 VMThread::execute(&op1);
391 // JNI global handles
392 VM_PrintJNI op2(output());
393 VMThread::execute(&op2);
395 // Deadlock detection
396 VM_FindDeadlocks op3(output());
397 VMThread::execute(&op3);
398 }
400 int ThreadDumpDCmd::num_arguments() {
401 ResourceMark rm;
402 ThreadDumpDCmd* dcmd = new ThreadDumpDCmd(NULL, false);
403 if (dcmd != NULL) {
404 DCmdMark mark(dcmd);
405 return dcmd->_dcmdparser.num_arguments();
406 } else {
407 return 0;
408 }
409 }
411 // Enhanced JMX Agent support
413 JMXStartRemoteDCmd::JMXStartRemoteDCmd(outputStream *output, bool heap_allocated) :
415 DCmdWithParser(output, heap_allocated),
417 _config_file
418 ("config.file",
419 "set com.sun.management.config.file", "STRING", false),
421 _jmxremote_port
422 ("jmxremote.port",
423 "set com.sun.management.jmxremote.port", "STRING", false),
425 _jmxremote_rmi_port
426 ("jmxremote.rmi.port",
427 "set com.sun.management.jmxremote.rmi.port", "STRING", false),
429 _jmxremote_ssl
430 ("jmxremote.ssl",
431 "set com.sun.management.jmxremote.ssl", "STRING", false),
433 _jmxremote_registry_ssl
434 ("jmxremote.registry.ssl",
435 "set com.sun.management.jmxremote.registry.ssl", "STRING", false),
437 _jmxremote_authenticate
438 ("jmxremote.authenticate",
439 "set com.sun.management.jmxremote.authenticate", "STRING", false),
441 _jmxremote_password_file
442 ("jmxremote.password.file",
443 "set com.sun.management.jmxremote.password.file", "STRING", false),
445 _jmxremote_access_file
446 ("jmxremote.access.file",
447 "set com.sun.management.jmxremote.access.file", "STRING", false),
449 _jmxremote_login_config
450 ("jmxremote.login.config",
451 "set com.sun.management.jmxremote.login.config", "STRING", false),
453 _jmxremote_ssl_enabled_cipher_suites
454 ("jmxremote.ssl.enabled.cipher.suites",
455 "set com.sun.management.jmxremote.ssl.enabled.cipher.suite", "STRING", false),
457 _jmxremote_ssl_enabled_protocols
458 ("jmxremote.ssl.enabled.protocols",
459 "set com.sun.management.jmxremote.ssl.enabled.protocols", "STRING", false),
461 _jmxremote_ssl_need_client_auth
462 ("jmxremote.ssl.need.client.auth",
463 "set com.sun.management.jmxremote.need.client.auth", "STRING", false),
465 _jmxremote_ssl_config_file
466 ("jmxremote.ssl.config.file",
467 "set com.sun.management.jmxremote.ssl_config_file", "STRING", false)
469 {
470 _dcmdparser.add_dcmd_option(&_config_file);
471 _dcmdparser.add_dcmd_option(&_jmxremote_port);
472 _dcmdparser.add_dcmd_option(&_jmxremote_rmi_port);
473 _dcmdparser.add_dcmd_option(&_jmxremote_ssl);
474 _dcmdparser.add_dcmd_option(&_jmxremote_registry_ssl);
475 _dcmdparser.add_dcmd_option(&_jmxremote_authenticate);
476 _dcmdparser.add_dcmd_option(&_jmxremote_password_file);
477 _dcmdparser.add_dcmd_option(&_jmxremote_access_file);
478 _dcmdparser.add_dcmd_option(&_jmxremote_login_config);
479 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_enabled_cipher_suites);
480 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_enabled_protocols);
481 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_need_client_auth);
482 _dcmdparser.add_dcmd_option(&_jmxremote_ssl_config_file);
483 }
486 int JMXStartRemoteDCmd::num_arguments() {
487 ResourceMark rm;
488 JMXStartRemoteDCmd* dcmd = new JMXStartRemoteDCmd(NULL, false);
489 if (dcmd != NULL) {
490 DCmdMark mark(dcmd);
491 return dcmd->_dcmdparser.num_arguments();
492 } else {
493 return 0;
494 }
495 }
498 void JMXStartRemoteDCmd::execute(TRAPS) {
499 ResourceMark rm(THREAD);
500 HandleMark hm(THREAD);
502 // Load and initialize the sun.management.Agent class
503 // invoke startRemoteManagementAgent(string) method to start
504 // the remote management server.
505 // throw java.lang.NoSuchMethodError if the method doesn't exist
507 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
508 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::sun_management_Agent(), loader, Handle(), true, CHECK);
509 instanceKlassHandle ik (THREAD, k);
511 JavaValue result(T_VOID);
513 // Pass all command line arguments to java as key=value,...
514 // All checks are done on java side
516 int len = 0;
517 stringStream options;
518 char comma[2] = {0,0};
520 // Leave default values on Agent.class side and pass only
521 // agruments explicitly set by user. All arguments passed
522 // to jcmd override properties with the same name set by
523 // command line with -D or by managmenent.properties
524 // file.
525 #define PUT_OPTION(a) \
526 if ( (a).is_set() ){ \
527 options.print("%scom.sun.management.%s=%s", comma, (a).name(), (a).value()); \
528 comma[0] = ','; \
529 }
531 PUT_OPTION(_config_file);
532 PUT_OPTION(_jmxremote_port);
533 PUT_OPTION(_jmxremote_rmi_port);
534 PUT_OPTION(_jmxremote_ssl);
535 PUT_OPTION(_jmxremote_registry_ssl);
536 PUT_OPTION(_jmxremote_authenticate);
537 PUT_OPTION(_jmxremote_password_file);
538 PUT_OPTION(_jmxremote_access_file);
539 PUT_OPTION(_jmxremote_login_config);
540 PUT_OPTION(_jmxremote_ssl_enabled_cipher_suites);
541 PUT_OPTION(_jmxremote_ssl_enabled_protocols);
542 PUT_OPTION(_jmxremote_ssl_need_client_auth);
543 PUT_OPTION(_jmxremote_ssl_config_file);
545 #undef PUT_OPTION
547 Handle str = java_lang_String::create_from_str(options.as_string(), CHECK);
548 JavaCalls::call_static(&result, ik, vmSymbols::startRemoteAgent_name(), vmSymbols::string_void_signature(), str, CHECK);
549 }
551 JMXStartLocalDCmd::JMXStartLocalDCmd(outputStream *output, bool heap_allocated) :
552 DCmd(output, heap_allocated)
553 {
554 // do nothing
555 }
557 void JMXStartLocalDCmd::execute(TRAPS) {
558 ResourceMark rm(THREAD);
559 HandleMark hm(THREAD);
561 // Load and initialize the sun.management.Agent class
562 // invoke startLocalManagementAgent(void) method to start
563 // the local management server
564 // throw java.lang.NoSuchMethodError if method doesn't exist
566 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
567 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::sun_management_Agent(), loader, Handle(), true, CHECK);
568 instanceKlassHandle ik (THREAD, k);
570 JavaValue result(T_VOID);
571 JavaCalls::call_static(&result, ik, vmSymbols::startLocalAgent_name(), vmSymbols::void_method_signature(), CHECK);
572 }
575 void JMXStopRemoteDCmd::execute(TRAPS) {
576 ResourceMark rm(THREAD);
577 HandleMark hm(THREAD);
579 // Load and initialize the sun.management.Agent class
580 // invoke stopRemoteManagementAgent method to stop the
581 // management server
582 // throw java.lang.NoSuchMethodError if method doesn't exist
584 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
585 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::sun_management_Agent(), loader, Handle(), true, CHECK);
586 instanceKlassHandle ik (THREAD, k);
588 JavaValue result(T_VOID);
589 JavaCalls::call_static(&result, ik, vmSymbols::stopRemoteAgent_name(), vmSymbols::void_method_signature(), CHECK);
590 }