Mercurial > jdk8-mips64-public > hotspot / file revision

 /*

  * Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved.

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

  *

  * This code is free software; you can redistribute it and/or modify it

  * under the terms of the GNU General Public License version 2 only, as

  * published by the Free Software Foundation.

  *

  * This code is distributed in the hope that it will be useful, but WITHOUT

  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

  * version 2 for more details (a copy is included in the LICENSE file that

  * accompanied this code).

  *

  * You should have received a copy of the GNU General Public License version

  * 2 along with this work; if not, write to the Free Software Foundation,

  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

  *

  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

  * or visit www.oracle.com if you need additional information or have any

  * questions.

  *

  */

 #include "precompiled.hpp"

 #include "classfile/javaClasses.hpp"

 #include "classfile/vmSymbols.hpp"

 #include "jfr/jfr.hpp"

 #include "jfr/dcmd/jfrDcmds.hpp"

 #include "jfr/jni/jfrJavaSupport.hpp"

 #include "jfr/recorder/jfrRecorder.hpp"

 #include "jfr/recorder/service/jfrOptionSet.hpp"

 #include "memory/resourceArea.hpp"

 #include "oops/oop.inline.hpp"

 #include "oops/symbol.hpp"

 #include "runtime/handles.inline.hpp"

 #include "services/diagnosticArgument.hpp"

 #include "services/diagnosticFramework.hpp"

 #include "utilities/globalDefinitions.hpp"

 #ifdef _WINDOWS

 #define JFR_FILENAME_EXAMPLE "C:\\Users\\user\\My Recording.jfr"

 #endif

 #ifdef __APPLE__

 #define JFR_FILENAME_EXAMPLE  "/Users/user/My Recording.jfr"

 #endif

 #ifndef JFR_FILENAME_EXAMPLE

 #define JFR_FILENAME_EXAMPLE "/home/user/My Recording.jfr"

 #endif

 // JNIHandle management

 // ------------------------------------------------------------------

 // push_jni_handle_block

 //

 // Push on a new block of JNI handles.

 static void push_jni_handle_block(Thread* const thread) {

   DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(thread));

   // Allocate a new block for JNI handles.

   // Inlined code from jni_PushLocalFrame()

   JNIHandleBlock* prev_handles = thread->active_handles();

   JNIHandleBlock* entry_handles = JNIHandleBlock::allocate_block(thread);

   assert(entry_handles != NULL && prev_handles != NULL, "should not be NULL");

   entry_handles->set_pop_frame_link(prev_handles);  // make sure prev handles get gc'd.

   thread->set_active_handles(entry_handles);

 }

 // ------------------------------------------------------------------

 // pop_jni_handle_block

 //

 // Pop off the current block of JNI handles.

 static void pop_jni_handle_block(Thread* const thread) {

   DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(thread));

   // Release our JNI handle block

   JNIHandleBlock* entry_handles = thread->active_handles();

   JNIHandleBlock* prev_handles = entry_handles->pop_frame_link();

   // restore

   thread->set_active_handles(prev_handles);

   entry_handles->set_pop_frame_link(NULL);

   JNIHandleBlock::release_block(entry_handles, thread); // may block

 }

 class JNIHandleBlockManager : public StackObj {

  private:

   Thread* const _thread;

  public:

   JNIHandleBlockManager(Thread* thread) : _thread(thread) {

     push_jni_handle_block(_thread);

   }

   ~JNIHandleBlockManager() {

     pop_jni_handle_block(_thread);

   }

 };

 static bool is_disabled(outputStream* output) {

   if (Jfr::is_disabled()) {

     if (output != NULL) {

       output->print_cr("Flight Recorder is disabled.\n");

     }

     return true;

   }

   return false;

 }

 static bool is_recorder_instance_created(outputStream* output) {

   if (!JfrRecorder::is_created()) {

     if (output != NULL) {

       output->print_cr("No available recordings.\n");

       output->print_cr("Use JFR.start to start a recording.\n");

     }

     return false;

   }

   return true;

 }

 static bool invalid_state(outputStream* out, TRAPS) {

   DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(THREAD));

   return is_disabled(out);

 }

 static void print_pending_exception(outputStream* output, oop throwable) {

   assert(throwable != NULL, "invariant");

   oop msg = java_lang_Throwable::message(throwable);

   if (msg != NULL) {

     char* text = java_lang_String::as_utf8_string(msg);

     output->print_raw_cr(text);

   }

 }

 static void print_message(outputStream* output, const char* message) {

   if (message != NULL) {

     output->print_raw(message);

   }

 }

 static void handle_dcmd_result(outputStream* output,

                                const oop result,

                                const DCmdSource source,

                                TRAPS) {

   DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(THREAD));

   assert(output != NULL, "invariant");

   if (HAS_PENDING_EXCEPTION) {

     print_pending_exception(output, PENDING_EXCEPTION);

     // Don't clear excption on startup, JVM should fail initialization.

     if (DCmd_Source_Internal != source) {

       CLEAR_PENDING_EXCEPTION;

     }

     return;

   }

   assert(!HAS_PENDING_EXCEPTION, "invariant");

   if (result != NULL) {

     const char* result_chars = java_lang_String::as_utf8_string(result);

     print_message(output, result_chars);

   }

 }

 static oop construct_dcmd_instance(JfrJavaArguments* args, TRAPS) {

   assert(args != NULL, "invariant");

   DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(THREAD));

   assert(args->klass() != NULL, "invariant");

   args->set_name("<init>", CHECK_NULL);

   args->set_signature("()V", CHECK_NULL);

   JfrJavaSupport::new_object(args, CHECK_NULL);

   return (oop)args->result()->get_jobject();

 }

 JfrDumpFlightRecordingDCmd::JfrDumpFlightRecordingDCmd(outputStream* output,

                                                        bool heap) : DCmdWithParser(output, heap),

   _name("name", "Recording name, e.g. \\\"My Recording\\\"", "STRING", false, NULL),

   _filename("filename", "Copy recording data to file, e.g. \\\"" JFR_FILENAME_EXAMPLE "\\\"", "STRING", false),

   _maxage("maxage", "Maximum duration to dump, in (s)econds, (m)inutes, (h)ours, or (d)ays, e.g. 60m, or 0 for no limit", "NANOTIME", false, "0"),

   _maxsize("maxsize", "Maximum amount of bytes to dump, in (M)B or (G)B, e.g. 500M, or 0 for no limit", "MEMORY SIZE", false, "0"),

   _begin("begin", "Point in time to dump data from, e.g. 09:00, 21:35:00, 2018-06-03T18:12:56.827Z, 2018-06-03T20:13:46.832, -10m, -3h, or -1d", "STRING", false),

   _end("end", "Point in time to dump data to, e.g. 09:00, 21:35:00, 2018-06-03T18:12:56.827Z, 2018-06-03T20:13:46.832, -10m, -3h, or -1d", "STRING", false),

   _path_to_gc_roots("path-to-gc-roots", "Collect path to GC roots", "BOOLEAN", false, "false") {

   _dcmdparser.add_dcmd_option(&_name);

   _dcmdparser.add_dcmd_option(&_filename);

   _dcmdparser.add_dcmd_option(&_maxage);

   _dcmdparser.add_dcmd_option(&_maxsize);

   _dcmdparser.add_dcmd_option(&_begin);

   _dcmdparser.add_dcmd_option(&_end);

   _dcmdparser.add_dcmd_option(&_path_to_gc_roots);

 };

 int JfrDumpFlightRecordingDCmd::num_arguments() {

   ResourceMark rm;

   JfrDumpFlightRecordingDCmd* dcmd = new JfrDumpFlightRecordingDCmd(NULL, false);

   if (dcmd != NULL) {

     DCmdMark mark(dcmd);

     return dcmd->_dcmdparser.num_arguments();

   }

   return 0;

 }

 void JfrDumpFlightRecordingDCmd::execute(DCmdSource source, TRAPS) {

   DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(THREAD));

   if (invalid_state(output(), THREAD) || !is_recorder_instance_created(output())) {

     return;

   }

   ResourceMark rm(THREAD);

   HandleMark hm(THREAD);

   JNIHandleBlockManager jni_handle_management(THREAD);

   JavaValue result(T_OBJECT);

   JfrJavaArguments constructor_args(&result);

   constructor_args.set_klass("jdk/jfr/internal/dcmd/DCmdDump", CHECK);

   const oop dcmd = construct_dcmd_instance(&constructor_args, CHECK);

   Handle h_dcmd_instance(THREAD, dcmd);

   assert(h_dcmd_instance.not_null(), "invariant");

   jstring name = NULL;

   if (_name.is_set() && _name.value()  != NULL) {

     name = JfrJavaSupport::new_string(_name.value(), CHECK);

   }

   jstring filepath = NULL;

   if (_filename.is_set() && _filename.value() != NULL) {

     filepath = JfrJavaSupport::new_string(_filename.value(), CHECK);

   }

   jobject maxage = NULL;

   if (_maxage.is_set()) {

     maxage = JfrJavaSupport::new_java_lang_Long(_maxage.value()._nanotime, CHECK);

   }

   jobject maxsize = NULL;

   if (_maxsize.is_set()) {

     maxsize = JfrJavaSupport::new_java_lang_Long(_maxsize.value()._size, CHECK);

   }

   jstring begin = NULL;

   if (_begin.is_set() && _begin.value() != NULL) {

     begin = JfrJavaSupport::new_string(_begin.value(), CHECK);

   }

   jstring end = NULL;

   if (_end.is_set() && _end.value() != NULL) {

     end = JfrJavaSupport::new_string(_end.value(), CHECK);

   }

   jobject path_to_gc_roots = NULL;

   if (_path_to_gc_roots.is_set()) {

     path_to_gc_roots = JfrJavaSupport::new_java_lang_Boolean(_path_to_gc_roots.value(), CHECK);

   }

   static const char klass[] = "jdk/jfr/internal/dcmd/DCmdDump";

   static const char method[] = "execute";

   static const char signature[] = "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/Long;Ljava/lang/Long;Ljava/lang/String;Ljava/lang/String;Ljava/lang/Boolean;)Ljava/lang/String;";

   JfrJavaArguments execute_args(&result, klass, method, signature, CHECK);

   execute_args.set_receiver(h_dcmd_instance);

   // arguments

   execute_args.push_jobject(name);

   execute_args.push_jobject(filepath);

   execute_args.push_jobject(maxage);

   execute_args.push_jobject(maxsize);

   execute_args.push_jobject(begin);

   execute_args.push_jobject(end);

   execute_args.push_jobject(path_to_gc_roots);

   JfrJavaSupport::call_virtual(&execute_args, THREAD);

   handle_dcmd_result(output(), (oop)result.get_jobject(), source, THREAD);

 }

 JfrCheckFlightRecordingDCmd::JfrCheckFlightRecordingDCmd(outputStream* output, bool heap) : DCmdWithParser(output, heap),

   _name("name","Recording name, e.g. \\\"My Recording\\\" or omit to see all recordings","STRING",false, NULL),

   _verbose("verbose","Print event settings for the recording(s)","BOOLEAN",

            false, "false") {

   _dcmdparser.add_dcmd_option(&_name);

   _dcmdparser.add_dcmd_option(&_verbose);

 };

 int JfrCheckFlightRecordingDCmd::num_arguments() {

   ResourceMark rm;

   JfrCheckFlightRecordingDCmd* dcmd = new JfrCheckFlightRecordingDCmd(NULL, false);

   if (dcmd != NULL) {

     DCmdMark mark(dcmd);

     return dcmd->_dcmdparser.num_arguments();

   }

   return 0;

 }

 void JfrCheckFlightRecordingDCmd::execute(DCmdSource source, TRAPS) {

   DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(THREAD));

   if (invalid_state(output(), THREAD) || !is_recorder_instance_created(output())) {

     return;

   }

   ResourceMark rm(THREAD);

   HandleMark hm(THREAD);

   JNIHandleBlockManager jni_handle_management(THREAD);

   JavaValue result(T_OBJECT);

   JfrJavaArguments constructor_args(&result);

   constructor_args.set_klass("jdk/jfr/internal/dcmd/DCmdCheck", CHECK);

   const oop dcmd = construct_dcmd_instance(&constructor_args, CHECK);

   Handle h_dcmd_instance(THREAD, dcmd);

   assert(h_dcmd_instance.not_null(), "invariant");

   jstring name = NULL;

   if (_name.is_set() && _name.value() != NULL) {

     name = JfrJavaSupport::new_string(_name.value(), CHECK);

   }

   jobject verbose = NULL;

   if (_verbose.is_set()) {

     verbose = JfrJavaSupport::new_java_lang_Boolean(_verbose.value(), CHECK);

   }

   static const char klass[] = "jdk/jfr/internal/dcmd/DCmdCheck";

   static const char method[] = "execute";

   static const char signature[] = "(Ljava/lang/String;Ljava/lang/Boolean;)Ljava/lang/String;";

   JfrJavaArguments execute_args(&result, klass, method, signature, CHECK);

   execute_args.set_receiver(h_dcmd_instance);

   // arguments

   execute_args.push_jobject(name);

   execute_args.push_jobject(verbose);

   JfrJavaSupport::call_virtual(&execute_args, THREAD);

   handle_dcmd_result(output(), (oop)result.get_jobject(), source, THREAD);

 }

 JfrStartFlightRecordingDCmd::JfrStartFlightRecordingDCmd(outputStream* output,

                                                          bool heap) : DCmdWithParser(output, heap),

   _name("name", "Name that can be used to identify recording, e.g. \\\"My Recording\\\"", "STRING", false, NULL),

   _settings("settings", "Settings file(s), e.g. profile or default. See JRE_HOME/lib/jfr", "STRING SET", false),

   _delay("delay", "Delay recording start with (s)econds, (m)inutes), (h)ours), or (d)ays, e.g. 5h.", "NANOTIME", false, "0"),

   _duration("duration", "Duration of recording in (s)econds, (m)inutes, (h)ours, or (d)ays, e.g. 300s.", "NANOTIME", false, "0"),

   _filename("filename", "Resulting recording filename, e.g. \\\"" JFR_FILENAME_EXAMPLE "\\\"", "STRING", false),

   _disk("disk", "Recording should be persisted to disk", "BOOLEAN", false),

   _maxage("maxage", "Maximum time to keep recorded data (on disk) in (s)econds, (m)inutes, (h)ours, or (d)ays, e.g. 60m, or 0 for no limit", "NANOTIME", false, "0"),

   _maxsize("maxsize", "Maximum amount of bytes to keep (on disk) in (k)B, (M)B or (G)B, e.g. 500M, or 0 for no limit", "MEMORY SIZE", false, "0"),

   _dump_on_exit("dumponexit", "Dump running recording when JVM shuts down", "BOOLEAN", false),

   _path_to_gc_roots("path-to-gc-roots", "Collect path to GC roots", "BOOLEAN", false, "false") {

   _dcmdparser.add_dcmd_option(&_name);

   _dcmdparser.add_dcmd_option(&_settings);

   _dcmdparser.add_dcmd_option(&_delay);

   _dcmdparser.add_dcmd_option(&_duration);

   _dcmdparser.add_dcmd_option(&_disk);

   _dcmdparser.add_dcmd_option(&_filename);

   _dcmdparser.add_dcmd_option(&_maxage);

   _dcmdparser.add_dcmd_option(&_maxsize);

   _dcmdparser.add_dcmd_option(&_dump_on_exit);

   _dcmdparser.add_dcmd_option(&_path_to_gc_roots);

 };

 int JfrStartFlightRecordingDCmd::num_arguments() {

   ResourceMark rm;

   JfrStartFlightRecordingDCmd* dcmd = new JfrStartFlightRecordingDCmd(NULL, false);

   if (dcmd != NULL) {

     DCmdMark mark(dcmd);

     return dcmd->_dcmdparser.num_arguments();

   }

   return 0;

 }

 void JfrStartFlightRecordingDCmd::execute(DCmdSource source, TRAPS) {

   DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(THREAD));

   if (invalid_state(output(), THREAD)) {

     return;

   }

   ResourceMark rm(THREAD);

   HandleMark hm(THREAD);

   JNIHandleBlockManager jni_handle_management(THREAD);

   JavaValue result(T_OBJECT);

   JfrJavaArguments constructor_args(&result);

   constructor_args.set_klass("jdk/jfr/internal/dcmd/DCmdStart", THREAD);

   const oop dcmd = construct_dcmd_instance(&constructor_args, CHECK);

   Handle h_dcmd_instance(THREAD, dcmd);

   assert(h_dcmd_instance.not_null(), "invariant");

   jstring name = NULL;

   if (_name.is_set() && _name.value() != NULL) {

     name = JfrJavaSupport::new_string(_name.value(), CHECK);

   }

   jstring filename = NULL;

   if (_filename.is_set() && _filename.value() != NULL) {

     filename = JfrJavaSupport::new_string(_filename.value(), CHECK);

   }

   jobject maxage = NULL;

   if (_maxage.is_set()) {

     maxage = JfrJavaSupport::new_java_lang_Long(_maxage.value()._nanotime, CHECK);

   }

   jobject maxsize = NULL;

   if (_maxsize.is_set()) {

     maxsize = JfrJavaSupport::new_java_lang_Long(_maxsize.value()._size, CHECK);

   }

   jobject duration = NULL;

   if (_duration.is_set()) {

     duration = JfrJavaSupport::new_java_lang_Long(_duration.value()._nanotime, CHECK);

   }

   jobject delay = NULL;

   if (_delay.is_set()) {

     delay = JfrJavaSupport::new_java_lang_Long(_delay.value()._nanotime, CHECK);

   }

   jobject disk = NULL;

   if (_disk.is_set()) {

     disk = JfrJavaSupport::new_java_lang_Boolean(_disk.value(), CHECK);

   }

   jobject dump_on_exit = NULL;

   if (_dump_on_exit.is_set()) {

     dump_on_exit = JfrJavaSupport::new_java_lang_Boolean(_dump_on_exit.value(), CHECK);

   }

   jobject path_to_gc_roots = NULL;

   if (_path_to_gc_roots.is_set()) {

     path_to_gc_roots = JfrJavaSupport::new_java_lang_Boolean(_path_to_gc_roots.value(), CHECK);

   }

   jobjectArray settings = NULL;

   if (_settings.is_set()) {

     int length = _settings.value()->array()->length();

     if (length == 1) {

       const char* c_str = _settings.value()->array()->at(0);

       if (strcmp(c_str, "none") == 0) {

         length = 0;

       }

     }

     settings = JfrJavaSupport::new_string_array(length, CHECK);

     assert(settings != NULL, "invariant");

     for (int i = 0; i < length; ++i) {

       jobject element = JfrJavaSupport::new_string(_settings.value()->array()->at(i), CHECK);

       assert(element != NULL, "invariant");

       JfrJavaSupport::set_array_element(settings, element, i, CHECK);

     }

   }

   static const char klass[] = "jdk/jfr/internal/dcmd/DCmdStart";

   static const char method[] = "execute";

   static const char signature[] = "(Ljava/lang/String;[Ljava/lang/String;Ljava/lang/Long;"

     "Ljava/lang/Long;Ljava/lang/Boolean;Ljava/lang/String;"

     "Ljava/lang/Long;Ljava/lang/Long;Ljava/lang/Boolean;Ljava/lang/Boolean;)Ljava/lang/String;";

   JfrJavaArguments execute_args(&result, klass, method, signature, CHECK);

   execute_args.set_receiver(h_dcmd_instance);

   // arguments

   execute_args.push_jobject(name);

   execute_args.push_jobject(settings);

   execute_args.push_jobject(delay);

   execute_args.push_jobject(duration);

   execute_args.push_jobject(disk);

   execute_args.push_jobject(filename);

   execute_args.push_jobject(maxage);

   execute_args.push_jobject(maxsize);

   execute_args.push_jobject(dump_on_exit);

   execute_args.push_jobject(path_to_gc_roots);

   JfrJavaSupport::call_virtual(&execute_args, THREAD);

   handle_dcmd_result(output(), (oop)result.get_jobject(), source, THREAD);

 }

 JfrStopFlightRecordingDCmd::JfrStopFlightRecordingDCmd(outputStream* output,

                                                        bool heap) : DCmdWithParser(output, heap),

   _name("name", "Recording text,.e.g \\\"My Recording\\\"", "STRING", true, NULL),

   _filename("filename", "Copy recording data to file, e.g. \\\"" JFR_FILENAME_EXAMPLE "\\\"", "STRING", false, NULL) {

   _dcmdparser.add_dcmd_option(&_name);

   _dcmdparser.add_dcmd_option(&_filename);

 };

 int JfrStopFlightRecordingDCmd::num_arguments() {

   ResourceMark rm;

   JfrStopFlightRecordingDCmd* dcmd = new JfrStopFlightRecordingDCmd(NULL, false);

   if (dcmd != NULL) {

     DCmdMark mark(dcmd);

     return dcmd->_dcmdparser.num_arguments();

   }

   return 0;

 }

 void JfrStopFlightRecordingDCmd::execute(DCmdSource source, TRAPS) {

   DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(THREAD));

   if (invalid_state(output(), THREAD) || !is_recorder_instance_created(output())) {

     return;

   }

   ResourceMark rm(THREAD);

   HandleMark hm(THREAD);

   JNIHandleBlockManager jni_handle_management(THREAD);

   JavaValue result(T_OBJECT);

   JfrJavaArguments constructor_args(&result);

   constructor_args.set_klass("jdk/jfr/internal/dcmd/DCmdStop", CHECK);

   const oop dcmd = construct_dcmd_instance(&constructor_args, CHECK);

   Handle h_dcmd_instance(THREAD, dcmd);

   assert(h_dcmd_instance.not_null(), "invariant");

   jstring name = NULL;

   if (_name.is_set() && _name.value()  != NULL) {

     name = JfrJavaSupport::new_string(_name.value(), CHECK);

   }

   jstring filepath = NULL;

   if (_filename.is_set() && _filename.value() != NULL) {

     filepath = JfrJavaSupport::new_string(_filename.value(), CHECK);

   }

   static const char klass[] = "jdk/jfr/internal/dcmd/DCmdStop";

   static const char method[] = "execute";

   static const char signature[] = "(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;";

   JfrJavaArguments execute_args(&result, klass, method, signature, CHECK);

   execute_args.set_receiver(h_dcmd_instance);

   // arguments

   execute_args.push_jobject(name);

   execute_args.push_jobject(filepath);

   JfrJavaSupport::call_virtual(&execute_args, THREAD);

   handle_dcmd_result(output(), (oop)result.get_jobject(), source, THREAD);

 }

 JfrConfigureFlightRecorderDCmd::JfrConfigureFlightRecorderDCmd(outputStream* output,

                                                                bool heap) : DCmdWithParser(output, heap),

   _repository_path("repositorypath", "Path to repository,.e.g \\\"My Repository\\\"", "STRING", false, NULL),

   _dump_path("dumppath", "Path to dump,.e.g \\\"My Dump path\\\"", "STRING", false, NULL),

   _stack_depth("stackdepth", "Stack Depth", "JULONG", false, "64"),

   _global_buffer_count("globalbuffercount", "Number of global buffers,", "JULONG", false, "20"),

   _global_buffer_size("globalbuffersize", "Size of a global buffers,", "MEMORY SIZE", false, "512k"),

   _thread_buffer_size("thread_buffer_size", "Size of a thread buffer", "MEMORY SIZE", false, "8k"),

   _memory_size("memorysize", "Overall memory size, ", "MEMORY SIZE", false, "10m"),

   _max_chunk_size("maxchunksize", "Size of an individual disk chunk", "MEMORY SIZE", false, "12m"),

   _sample_threads("samplethreads", "Activate Thread sampling", "BOOLEAN", false, "true") {

   _dcmdparser.add_dcmd_option(&_repository_path);

   _dcmdparser.add_dcmd_option(&_dump_path);

   _dcmdparser.add_dcmd_option(&_stack_depth);

   _dcmdparser.add_dcmd_option(&_global_buffer_count);

   _dcmdparser.add_dcmd_option(&_global_buffer_size);

   _dcmdparser.add_dcmd_option(&_thread_buffer_size);

   _dcmdparser.add_dcmd_option(&_memory_size);

   _dcmdparser.add_dcmd_option(&_max_chunk_size);

   _dcmdparser.add_dcmd_option(&_sample_threads);

 };

 int JfrConfigureFlightRecorderDCmd::num_arguments() {

   ResourceMark rm;

   JfrConfigureFlightRecorderDCmd* dcmd = new JfrConfigureFlightRecorderDCmd(NULL, false);

   if (dcmd != NULL) {

     DCmdMark mark(dcmd);

     return dcmd->_dcmdparser.num_arguments();

   }

   return 0;

 }

 void JfrConfigureFlightRecorderDCmd::execute(DCmdSource source, TRAPS) {

   DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(THREAD));

   if (invalid_state(output(), THREAD)) {

     return;

   }

   ResourceMark rm(THREAD);

   HandleMark hm(THREAD);

   JNIHandleBlockManager jni_handle_management(THREAD);

   JavaValue result(T_OBJECT);

   JfrJavaArguments constructor_args(&result);

   constructor_args.set_klass("jdk/jfr/internal/dcmd/DCmdConfigure", CHECK);

   const oop dcmd = construct_dcmd_instance(&constructor_args, CHECK);

   Handle h_dcmd_instance(THREAD, dcmd);

   assert(h_dcmd_instance.not_null(), "invariant");

   jstring repository_path = NULL;

   if (_repository_path.is_set() && _repository_path.value() != NULL) {

     repository_path = JfrJavaSupport::new_string(_repository_path.value(), CHECK);

   }

   jstring dump_path = NULL;

   if (_dump_path.is_set() && _dump_path.value() != NULL) {

     dump_path = JfrJavaSupport::new_string(_dump_path.value(), CHECK);

   }

   jobject stack_depth = NULL;

   if (_stack_depth.is_set()) {

     stack_depth = JfrJavaSupport::new_java_lang_Integer((jint)_stack_depth.value(), CHECK);

   }

   jobject global_buffer_count = NULL;

   if (_global_buffer_count.is_set()) {

     global_buffer_count = JfrJavaSupport::new_java_lang_Long(_global_buffer_count.value(), CHECK);

   }

   jobject global_buffer_size = NULL;

   if (_global_buffer_size.is_set()) {

     global_buffer_size = JfrJavaSupport::new_java_lang_Long(_global_buffer_size.value()._size, CHECK);

   }

   jobject thread_buffer_size = NULL;

   if (_thread_buffer_size.is_set()) {

     thread_buffer_size = JfrJavaSupport::new_java_lang_Long(_thread_buffer_size.value()._size, CHECK);

   }

   jobject max_chunk_size = NULL;

   if (_max_chunk_size.is_set()) {

     max_chunk_size = JfrJavaSupport::new_java_lang_Long(_max_chunk_size.value()._size, CHECK);

   }

   jobject memory_size = NULL;

   if (_memory_size.is_set()) {

     memory_size = JfrJavaSupport::new_java_lang_Long(_memory_size.value()._size, CHECK);

   }

   jobject sample_threads = NULL;

   if (_sample_threads.is_set()) {

     sample_threads = JfrJavaSupport::new_java_lang_Boolean(_sample_threads.value(), CHECK);

   }

   static const char klass[] = "jdk/jfr/internal/dcmd/DCmdConfigure";

   static const char method[] = "execute";

   static const char signature[] = "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/Integer;"

     "Ljava/lang/Long;Ljava/lang/Long;Ljava/lang/Long;Ljava/lang/Long;"

     "Ljava/lang/Long;Ljava/lang/Boolean;)Ljava/lang/String;";

   JfrJavaArguments execute_args(&result, klass, method, signature, CHECK);

   execute_args.set_receiver(h_dcmd_instance);

   // params

   execute_args.push_jobject(repository_path);

   execute_args.push_jobject(dump_path);

   execute_args.push_jobject(stack_depth);

   execute_args.push_jobject(global_buffer_count);

   execute_args.push_jobject(global_buffer_size);

   execute_args.push_jobject(thread_buffer_size);

   execute_args.push_jobject(memory_size);

   execute_args.push_jobject(max_chunk_size);

   execute_args.push_jobject(sample_threads);

   JfrJavaSupport::call_virtual(&execute_args, THREAD);

   handle_dcmd_result(output(), (oop)result.get_jobject(), source, THREAD);

 }

 bool register_jfr_dcmds() {

   uint32_t full_export = DCmd_Source_Internal | DCmd_Source_AttachAPI | DCmd_Source_MBean;

   DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JfrCheckFlightRecordingDCmd>(full_export, true, false));

   DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JfrDumpFlightRecordingDCmd>(full_export, true, false));

   DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JfrStartFlightRecordingDCmd>(full_export, true, false));

   DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JfrStopFlightRecordingDCmd>(full_export, true, false));

   DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JfrConfigureFlightRecorderDCmd>(full_export, true, false));

   DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JfrUnlockCommercialFeaturesDCmd>(full_export, true, false));

   return true;

 }