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 "jfr/dcmd/jfrDcmds.hpp"

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

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

 #include "jfr/utilities/jfrAllocation.hpp"

 #include "memory/allocation.inline.hpp"

 #include "memory/resourceArea.hpp"

 #include "runtime/java.hpp"

 #include "runtime/thread.inline.hpp"

 #include "services/diagnosticArgument.hpp"

 #include "services/diagnosticFramework.hpp"

 #include "utilities/growableArray.hpp"

 #include "utilities/ostream.hpp"

 struct ObsoleteOption {

   const char* name;

   const char* message;

 };

 static const ObsoleteOption OBSOLETE_OPTIONS[] = {

   {"checkpointbuffersize", ""},

   {"maxsize",              "Use -XX:StartFlightRecording=maxsize=... instead."},

   {"maxage",               "Use -XX:StartFlightRecording=maxage=... instead."},

   {"settings",             "Use -XX:StartFlightRecording=settings=... instead."},

   {"defaultrecording",     "Use -XX:StartFlightRecording=disk=false to create an in-memory recording."},

   {"disk",                 "Use -XX:StartFlightRecording=disk=... instead."},

   {"dumponexit",           "Use -XX:StartFlightRecording=dumponexit=... instead."},

   {"dumponexitpath",       "Use -XX:StartFlightRecording=filename=... instead."},

   {"loglevel",             "Use -Xlog:jfr=... instead."}

 };

 jlong JfrOptionSet::max_chunk_size() {

   return _max_chunk_size;

 }

 void JfrOptionSet::set_max_chunk_size(jlong value) {

   _max_chunk_size = value;

 }

 jlong JfrOptionSet::global_buffer_size() {

   return _global_buffer_size;

 }

 void JfrOptionSet::set_global_buffer_size(jlong value) {

   _global_buffer_size = value;

 }

 jlong JfrOptionSet::thread_buffer_size() {

   return _thread_buffer_size;

 }

 void JfrOptionSet::set_thread_buffer_size(jlong value) {

   _thread_buffer_size = value;

 }

 jlong JfrOptionSet::memory_size() {

   return _memory_size;

 }

 void JfrOptionSet::set_memory_size(jlong value) {

   _memory_size = value;

 }

 jlong JfrOptionSet::num_global_buffers() {

   return _num_global_buffers;

 }

 void JfrOptionSet::set_num_global_buffers(jlong value) {

   _num_global_buffers = value;

 }

 jint JfrOptionSet::old_object_queue_size() {

   return (jint)_old_object_queue_size;

 }

 void JfrOptionSet::set_old_object_queue_size(jlong value) {

   _old_object_queue_size = value;

 }

 u4 JfrOptionSet::stackdepth() {

   return _stack_depth;

 }

 static const u4 STACK_DEPTH_DEFAULT = 64;

 static const u4 MIN_STACK_DEPTH = 1;

 static const u4 MAX_STACK_DEPTH = 2048;

 void JfrOptionSet::set_stackdepth(u4 depth) {

   if (depth < MIN_STACK_DEPTH) {

     _stack_depth = MIN_STACK_DEPTH;

   } else if (depth > MAX_STACK_DEPTH) {

     _stack_depth = MAX_STACK_DEPTH;

   } else {

     _stack_depth = depth;

   }

 }

 bool JfrOptionSet::sample_threads() {

   return _sample_threads == JNI_TRUE;

 }

 void JfrOptionSet::set_sample_threads(jboolean sample) {

   _sample_threads = sample;

 }

 bool JfrOptionSet::can_retransform() {

   return _retransform == JNI_TRUE;

 }

 void JfrOptionSet::set_retransform(jboolean value) {

   _retransform = value;

 }

 bool JfrOptionSet::sample_protection() {

   return _sample_protection == JNI_TRUE;

 }

 #ifdef ASSERT

 void JfrOptionSet::set_sample_protection(jboolean protection) {

   _sample_protection = protection;

 }

 #endif

 bool JfrOptionSet::compressed_integers() {

   // Set this to false for debugging purposes.

   return true;

 }

 bool JfrOptionSet::allow_retransforms() {

 #if INCLUDE_JVMTI

   return true;

 #else

   return false;

 #endif

 }

 bool JfrOptionSet::allow_event_retransforms() {

   return allow_retransforms() && (DumpSharedSpaces || can_retransform());

 }

 // default options for the dcmd parser

 const char* const default_repository = NULL;

 const char* const default_global_buffer_size = "512k";

 const char* const default_num_global_buffers = "20";

 const char* const default_memory_size = "10m";

 const char* const default_thread_buffer_size = "8k";

 const char* const default_max_chunk_size = "12m";

 const char* const default_sample_threads = "true";

 const char* const default_stack_depth = "64";

 const char* const default_retransform = "true";

 const char* const default_old_object_queue_size = "256";

 DEBUG_ONLY(const char* const default_sample_protection = "false";)

 // statics

 static DCmdArgument<char*> _dcmd_repository(

   "repository",

   "Flight recorder disk repository location",

   "STRING",

   false,

   default_repository);

 static DCmdArgument<MemorySizeArgument> _dcmd_threadbuffersize(

   "threadbuffersize",

   "Thread buffer size",

   "MEMORY SIZE",

   false,

   default_thread_buffer_size);

 static DCmdArgument<MemorySizeArgument> _dcmd_memorysize(

   "memorysize",

   "Size of memory to be used by Flight Recorder",

   "MEMORY SIZE",

   false,

   default_memory_size);

 static DCmdArgument<MemorySizeArgument> _dcmd_globalbuffersize(

   "globalbuffersize",

   "Global buffer size",

   "MEMORY SIZE",

   false,

   default_global_buffer_size);

 static DCmdArgument<jlong> _dcmd_numglobalbuffers(

   "numglobalbuffers",

   "Number of global buffers",

   "JULONG",

   false,

   default_num_global_buffers);

 static DCmdArgument<MemorySizeArgument> _dcmd_maxchunksize(

   "maxchunksize",

   "Maximum size of a single repository disk chunk",

   "MEMORY SIZE",

   false,

   default_max_chunk_size);

 static DCmdArgument<jlong> _dcmd_old_object_queue_size (

   "old-object-queue-size",

   "Maximum number of old objects to track",

   "JINT",

   false,

   default_old_object_queue_size);

 static DCmdArgument<bool> _dcmd_sample_threads(

   "samplethreads",

   "Thread sampling enable / disable (only sampling when event enabled and sampling enabled)",

   "BOOLEAN",

   false,

   default_sample_threads);

 #ifdef ASSERT

 static DCmdArgument<bool> _dcmd_sample_protection(

   "sampleprotection",

   "Safeguard for stackwalking while sampling threads (false by default)",

   "BOOLEAN",

   false,

   default_sample_protection);

 #endif

 static DCmdArgument<jlong> _dcmd_stackdepth(

   "stackdepth",

   "Stack depth for stacktraces (minimum 1, maximum 2048)",

   "JULONG",

   false,

   default_stack_depth);

 static DCmdArgument<bool> _dcmd_retransform(

   "retransform",

   "If event classes should be instrumented using JVMTI (by default true)",

   "BOOLEAN",

   true,

   default_retransform);

 static DCmdParser _parser;

 static void register_parser_options() {

   _parser.add_dcmd_option(&_dcmd_repository);

   _parser.add_dcmd_option(&_dcmd_threadbuffersize);

   _parser.add_dcmd_option(&_dcmd_memorysize);

   _parser.add_dcmd_option(&_dcmd_globalbuffersize);

   _parser.add_dcmd_option(&_dcmd_numglobalbuffers);

   _parser.add_dcmd_option(&_dcmd_maxchunksize);

   _parser.add_dcmd_option(&_dcmd_stackdepth);

   _parser.add_dcmd_option(&_dcmd_sample_threads);

   _parser.add_dcmd_option(&_dcmd_retransform);

   _parser.add_dcmd_option(&_dcmd_old_object_queue_size);

   DEBUG_ONLY(_parser.add_dcmd_option(&_dcmd_sample_protection);)

 }

 static bool parse_flight_recorder_options_internal(TRAPS) {

   if (FlightRecorderOptions == NULL) {

     return true;

   }

   const size_t length = strlen((const char*)FlightRecorderOptions);

   CmdLine cmdline((const char*)FlightRecorderOptions, length, true);

   _parser.parse(&cmdline, ',', THREAD);

   if (HAS_PENDING_EXCEPTION) {

     for (int index = 0; index < 9; index++) {

       ObsoleteOption option = OBSOLETE_OPTIONS[index];

       const char* p = strstr((const char*)FlightRecorderOptions, option.name);

       const size_t option_length = strlen(option.name);

       if (p != NULL && p[option_length] == '=') {

         tty->print_cr("-XX:FlightRecorderOptions=%s=... has been removed. %s", option.name, option.message);

         return false;

       }

     }

     ResourceMark rm(THREAD);

     oop message = java_lang_Throwable::message(PENDING_EXCEPTION);

     if (message != NULL) {

       const char* msg = java_lang_String::as_utf8_string(message);

       tty->print_cr("%s", msg);

     }

     CLEAR_PENDING_EXCEPTION;

     return false;

   }

   return true;

 }

 jlong JfrOptionSet::_max_chunk_size = 0;

 jlong JfrOptionSet::_global_buffer_size = 0;

 jlong JfrOptionSet::_thread_buffer_size = 0;

 jlong JfrOptionSet::_memory_size = 0;

 jlong JfrOptionSet::_num_global_buffers = 0;

 jlong JfrOptionSet::_old_object_queue_size = 0;

 u4 JfrOptionSet::_stack_depth = STACK_DEPTH_DEFAULT;

 jboolean JfrOptionSet::_sample_threads = JNI_TRUE;

 jboolean JfrOptionSet::_retransform = JNI_TRUE;

 #ifdef ASSERT

 jboolean JfrOptionSet::_sample_protection = JNI_FALSE;

 #else

 jboolean JfrOptionSet::_sample_protection = JNI_TRUE;

 #endif

 bool JfrOptionSet::initialize(Thread* thread) {

   register_parser_options();

   if (!parse_flight_recorder_options_internal(thread)) {

     return false;

   }

   if (_dcmd_retransform.is_set()) {

     set_retransform(_dcmd_retransform.value());

   }

   set_old_object_queue_size(_dcmd_old_object_queue_size.value());

   return adjust_memory_options();

 }

 bool JfrOptionSet::configure(TRAPS) {

   if (FlightRecorderOptions == NULL) {

     return true;

   }

   ResourceMark rm(THREAD);

   bufferedStream st;

   // delegate to DCmd execution

   JfrConfigureFlightRecorderDCmd configure(&st, false);

   configure._repository_path.set_is_set(_dcmd_repository.is_set());

   char* repo = _dcmd_repository.value();

   if (repo != NULL) {

     const size_t len = strlen(repo);

     char* repo_copy = JfrCHeapObj::new_array<char>(len + 1);

     if (NULL == repo_copy) {

       return false;

     }

     strncpy(repo_copy, repo, len + 1);

     configure._repository_path.set_value(repo_copy);

   }

   configure._stack_depth.set_is_set(_dcmd_stackdepth.is_set());

   configure._stack_depth.set_value(_dcmd_stackdepth.value());

   configure._thread_buffer_size.set_is_set(_dcmd_threadbuffersize.is_set());

   configure._thread_buffer_size.set_value(_dcmd_threadbuffersize.value());

   configure._global_buffer_count.set_is_set(_dcmd_numglobalbuffers.is_set());

   configure._global_buffer_count.set_value(_dcmd_numglobalbuffers.value());

   configure._global_buffer_size.set_is_set(_dcmd_globalbuffersize.is_set());

   configure._global_buffer_size.set_value(_dcmd_globalbuffersize.value());

   configure._max_chunk_size.set_is_set(_dcmd_maxchunksize.is_set());

   configure._max_chunk_size.set_value(_dcmd_maxchunksize.value());

   configure._memory_size.set_is_set(_dcmd_memorysize.is_set());

   configure._memory_size.set_value(_dcmd_memorysize.value());

   configure._sample_threads.set_is_set(_dcmd_sample_threads.is_set());

   configure._sample_threads.set_value(_dcmd_sample_threads.value());

   configure.execute(DCmd_Source_Internal, THREAD);

   if (HAS_PENDING_EXCEPTION) {

     java_lang_Throwable::print(PENDING_EXCEPTION, tty);

     CLEAR_PENDING_EXCEPTION;

     return false;

   }

   return true;

 }

 template <typename Argument>

 static julong divide_with_user_unit(Argument& memory_argument, julong value) {

   if (memory_argument.value()._size != memory_argument.value()._val) {

     switch (memory_argument.value()._multiplier) {

     case 'k': case 'K':

       return value / K;

     case 'm': case 'M':

       return value / M;

     case 'g': case 'G':

       return value / G;

     }

   }

   return value;

 }

 template <typename Argument>

 static void log_lower_than_min_value(Argument& memory_argument, julong min_value) {

   if (memory_argument.value()._size != memory_argument.value()._val) {

     // has multiplier

     tty->print_cr(

       "This value is lower than the minimum size required " JULONG_FORMAT "%c",

       divide_with_user_unit(memory_argument, min_value),

       memory_argument.value()._multiplier);

     return;

   }

   tty->print_cr(

     "This value is lower than the minimum size required " JULONG_FORMAT,

     divide_with_user_unit(memory_argument, min_value));

 }

 template <typename Argument>

 static void log_set_value(Argument& memory_argument) {

   if (memory_argument.value()._size != memory_argument.value()._val) {

     // has multiplier

     tty->print_cr(

       "Value specified for option \"%s\" is " JULONG_FORMAT "%c",

       memory_argument.name(),

       memory_argument.value()._val,

       memory_argument.value()._multiplier);

     return;

   }

   tty->print_cr(

     "Value specified for option \"%s\" is " JULONG_FORMAT,

     memory_argument.name(), memory_argument.value()._val);

 }

 template <typename MemoryArg>

 static void log_adjustments(MemoryArg& original_memory_size, julong new_memory_size, const char* msg) {

   if (LogJFR && Verbose) tty->print_cr(

     "%s size (original) " JULONG_FORMAT " B (user defined: %s)",

     msg,

     original_memory_size.value()._size,

     original_memory_size.is_set() ? "true" : "false");

   if (LogJFR && Verbose) tty->print_cr(

     "%s size (adjusted) " JULONG_FORMAT " B (modified: %s)",

     msg,

     new_memory_size,

     original_memory_size.value()._size != new_memory_size ? "true" : "false");

   if (LogJFR && Verbose) tty->print_cr(

     "%s size (adjustment) %s" JULONG_FORMAT " B",

     msg,

     new_memory_size < original_memory_size.value()._size ? "-" : "+",

     new_memory_size < original_memory_size.value()._size ?

     original_memory_size.value()._size - new_memory_size :

     new_memory_size - original_memory_size.value()._size);

 }

 // All "triangular" options are explicitly set

 // check that they are congruent and not causing

 // an ambiguous situtation

 template <typename MemoryArg, typename NumberArg>

 static bool check_for_ambiguity(MemoryArg& memory_size, MemoryArg& global_buffer_size, NumberArg& num_global_buffers) {

   assert(memory_size.is_set(), "invariant");

   assert(global_buffer_size.is_set(), "invariant");

   assert(num_global_buffers.is_set(), "invariant");

   const julong calc_size = global_buffer_size.value()._size * (julong)num_global_buffers.value();

   if (calc_size != memory_size.value()._size) {

     // ambiguous

     log_set_value(global_buffer_size);

     tty->print_cr(

       "Value specified for option \"%s\" is " JLONG_FORMAT,

       num_global_buffers.name(), num_global_buffers.value());

     log_set_value(memory_size);

     tty->print_cr(

       "These values are causing an ambiguity when trying to determine how much memory to use");

     tty->print_cr("\"%s\" * \"%s\" do not equal \"%s\"",

       global_buffer_size.name(),

       num_global_buffers.name(),

       memory_size.name());

     tty->print_cr(

       "Try to remove one of the involved options or make sure they are unambigous");

     return false;

   }

   return true;

 }

 template <typename Argument>

 static bool ensure_minimum_count(Argument& buffer_count_argument, jlong min_count) {

   if (buffer_count_argument.value() < min_count) {

     tty->print_cr(

       "Value specified for option \"%s\" is " JLONG_FORMAT,

       buffer_count_argument.name(), buffer_count_argument.value());

     tty->print_cr(

       "This value is lower than the minimum required number " JLONG_FORMAT,

       min_count);

     return false;

   }

   return true;

 }

 // global buffer size and num global buffers specified

 // ensure that particular combination to be ihigher than minimum memory size

 template <typename MemoryArg, typename NumberArg>

 static bool ensure_calculated_gteq(MemoryArg& global_buffer_size, NumberArg& num_global_buffers, julong min_value) {

   assert(global_buffer_size.is_set(), "invariant");

   assert(num_global_buffers.is_set(), "invariant");

   const julong calc_size = global_buffer_size.value()._size * (julong)num_global_buffers.value();

   if (calc_size < min_value) {

     log_set_value(global_buffer_size);

     tty->print_cr(

       "Value specified for option \"%s\" is " JLONG_FORMAT,

       num_global_buffers.name(), num_global_buffers.value());

     tty->print_cr("\"%s\" * \"%s\" (" JULONG_FORMAT

       ") is lower than minimum memory size required " JULONG_FORMAT,

       global_buffer_size.name(),

       num_global_buffers.name(),

       calc_size,

       min_value);

     return false;

   }

   return true;

 }

 template <typename Argument>

 static bool ensure_first_gteq_second(Argument& first_argument, Argument& second_argument) {

   if (second_argument.value()._size > first_argument.value()._size) {

     log_set_value(first_argument);

     log_set_value(second_argument);

     tty->print_cr(

       "The value for option \"%s\" should not be larger than the value specified for option \"%s\"",

       second_argument.name(), first_argument.name());

     return false;

   }

   return true;

 }

 static bool valid_memory_relations(const JfrMemoryOptions& options) {

   if (options.global_buffer_size_configured) {

     if (options.memory_size_configured) {

       if (!ensure_first_gteq_second(_dcmd_memorysize, _dcmd_globalbuffersize)) {

         return false;

       }

     }

     if (options.thread_buffer_size_configured) {

       if (!ensure_first_gteq_second(_dcmd_globalbuffersize, _dcmd_threadbuffersize)) {

         return false;

       }

     }

     if (options.buffer_count_configured) {

       if (!ensure_calculated_gteq(_dcmd_globalbuffersize, _dcmd_numglobalbuffers, MIN_MEMORY_SIZE)) {

         return false;

       }

     }

   }

   return true;

 }

 static void post_process_adjusted_memory_options(const JfrMemoryOptions& options) {

   assert(options.memory_size >= MIN_MEMORY_SIZE, "invariant");

   assert(options.global_buffer_size >= MIN_GLOBAL_BUFFER_SIZE, "invariant");

   assert(options.buffer_count >= MIN_BUFFER_COUNT, "invariant");

   assert(options.thread_buffer_size >= MIN_THREAD_BUFFER_SIZE, "invariant");

   log_adjustments(_dcmd_memorysize, options.memory_size, "Memory");

   log_adjustments(_dcmd_globalbuffersize, options.global_buffer_size, "Global buffer");

   log_adjustments(_dcmd_threadbuffersize, options.thread_buffer_size, "Thread local buffer");

   if (LogJFR && Verbose) tty->print_cr("Number of global buffers (original) " JLONG_FORMAT " (user defined: %s)",

     _dcmd_numglobalbuffers.value(),

     _dcmd_numglobalbuffers.is_set() ? "true" : "false");

   if (LogJFR && Verbose) tty->print_cr( "Number of global buffers (adjusted) " JULONG_FORMAT " (modified: %s)",

     options.buffer_count,

     _dcmd_numglobalbuffers.value() != (jlong)options.buffer_count ? "true" : "false");

   if (LogJFR && Verbose) tty->print_cr("Number of global buffers (adjustment) %s" JLONG_FORMAT,

     (jlong)options.buffer_count < _dcmd_numglobalbuffers.value() ? "" : "+",

     (jlong)options.buffer_count - _dcmd_numglobalbuffers.value());

   MemorySizeArgument adjusted_memory_size;

   adjusted_memory_size._val = divide_with_user_unit(_dcmd_memorysize, options.memory_size);

   adjusted_memory_size._multiplier = _dcmd_memorysize.value()._multiplier;

   adjusted_memory_size._size = options.memory_size;

   MemorySizeArgument adjusted_global_buffer_size;

   adjusted_global_buffer_size._val = divide_with_user_unit(_dcmd_globalbuffersize, options.global_buffer_size);

   adjusted_global_buffer_size._multiplier = _dcmd_globalbuffersize.value()._multiplier;

   adjusted_global_buffer_size._size = options.global_buffer_size;

   MemorySizeArgument adjusted_thread_buffer_size;

   adjusted_thread_buffer_size._val = divide_with_user_unit(_dcmd_threadbuffersize, options.thread_buffer_size);

   adjusted_thread_buffer_size._multiplier = _dcmd_threadbuffersize.value()._multiplier;

   adjusted_thread_buffer_size._size = options.thread_buffer_size;

   // store back to dcmd

   _dcmd_memorysize.set_value(adjusted_memory_size);

   _dcmd_memorysize.set_is_set(true);

   _dcmd_globalbuffersize.set_value(adjusted_global_buffer_size);

   _dcmd_globalbuffersize.set_is_set(true);

   _dcmd_numglobalbuffers.set_value((jlong)options.buffer_count);

   _dcmd_numglobalbuffers.set_is_set(true);

   _dcmd_threadbuffersize.set_value(adjusted_thread_buffer_size);

   _dcmd_threadbuffersize.set_is_set(true);

 }

 static void initialize_memory_options_from_dcmd(JfrMemoryOptions& options) {

   options.memory_size = _dcmd_memorysize.value()._size;

   options.global_buffer_size = MAX2<julong>(_dcmd_globalbuffersize.value()._size, (julong)os::vm_page_size());

   options.buffer_count = (julong)_dcmd_numglobalbuffers.value();

   options.thread_buffer_size = MAX2<julong>(_dcmd_threadbuffersize.value()._size, (julong)os::vm_page_size());

   // determine which options have been explicitly set

   options.memory_size_configured = _dcmd_memorysize.is_set();

   options.global_buffer_size_configured = _dcmd_globalbuffersize.is_set();

   options.buffer_count_configured = _dcmd_numglobalbuffers.is_set();

   options.thread_buffer_size_configured = _dcmd_threadbuffersize.is_set();

   assert(options.memory_size >= MIN_MEMORY_SIZE, "invariant");

   assert(options.global_buffer_size >= MIN_GLOBAL_BUFFER_SIZE, "invariant");

   assert(options.buffer_count >= MIN_BUFFER_COUNT, "invariant");

   assert(options.thread_buffer_size >= MIN_THREAD_BUFFER_SIZE, "invariant");

 }

 template <typename Argument>

 static bool ensure_gteq(Argument& memory_argument, const jlong value) {

   if ((jlong)memory_argument.value()._size < value) {

     log_set_value(memory_argument);

     log_lower_than_min_value(memory_argument, value);

     return false;

   }

   return true;

 }

 static bool ensure_valid_minimum_sizes() {

   // ensure valid minimum memory sizes

   if (_dcmd_memorysize.is_set()) {

     if (!ensure_gteq(_dcmd_memorysize, MIN_MEMORY_SIZE)) {

       return false;

     }

   }

   if (_dcmd_globalbuffersize.is_set()) {

     if (!ensure_gteq(_dcmd_globalbuffersize, MIN_GLOBAL_BUFFER_SIZE)) {

       return false;

     }

   }

   if (_dcmd_numglobalbuffers.is_set()) {

     if (!ensure_minimum_count(_dcmd_numglobalbuffers, MIN_BUFFER_COUNT)) {

       return false;

     }

   }

   if (_dcmd_threadbuffersize.is_set()) {

     if (!ensure_gteq(_dcmd_threadbuffersize, MIN_THREAD_BUFFER_SIZE)) {

       return false;

     }

   }

   return true;

 }

 /**

  * Starting with the initial set of memory values from the user,

  * sanitize, enforce min/max rules and adjust to a set of consistent options.

  *

  * Adjusted memory sizes will be page aligned.

  */

 bool JfrOptionSet::adjust_memory_options() {

   if (!ensure_valid_minimum_sizes()) {

     return false;

   }

   JfrMemoryOptions options;

   initialize_memory_options_from_dcmd(options);

   if (!valid_memory_relations(options)) {

     return false;

   }

   if (!JfrMemorySizer::adjust_options(&options)) {

     if (!check_for_ambiguity(_dcmd_memorysize, _dcmd_globalbuffersize, _dcmd_numglobalbuffers)) {

       return false;

     }

   }

   post_process_adjusted_memory_options(options);

   return true;

 }

 bool JfrOptionSet::parse_flight_recorder_option(const JavaVMOption** option, char* delimiter) {

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

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

   assert((*option)->optionString != NULL, "invariant");

   assert(strncmp((*option)->optionString, "-XX:FlightRecorderOptions", 25) == 0, "invariant");

   if (*delimiter == '\0') {

     // -XX:FlightRecorderOptions without any delimiter and values

   } else {

     // -XX:FlightRecorderOptions[=|:]

     // set delimiter to '='

     *delimiter = '=';

   }

   return false;

 }

 static GrowableArray<const char*>* startup_recording_options_array = NULL;

 bool JfrOptionSet::parse_start_flight_recording_option(const JavaVMOption** option, char* delimiter) {

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

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

   assert((*option)->optionString != NULL, "invariant");

   assert(strncmp((*option)->optionString, "-XX:StartFlightRecording", 24) == 0, "invariant");

   const char* value = NULL;

   if (*delimiter == '\0') {

     // -XX:StartFlightRecording without any delimiter and values

     // Add dummy value "dumponexit=false" so -XX:StartFlightRecording can be used without explicit values.

     // The existing option->optionString points to stack memory so no need to deallocate.

     const_cast<JavaVMOption*>(*option)->optionString = (char*)"-XX:StartFlightRecording=dumponexit=false";

     value = (*option)->optionString + 25;

   } else {

     // -XX:StartFlightRecording[=|:]

     // set delimiter to '='

     *delimiter = '=';

     value = delimiter + 1;

   }

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

   const size_t value_length = strlen(value);

   if (startup_recording_options_array == NULL) {

     startup_recording_options_array = new (ResourceObj::C_HEAP, mtTracing) GrowableArray<const char*>(8, true, mtTracing);

   }

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

   char* const startup_value = NEW_C_HEAP_ARRAY(char, value_length + 1, mtTracing);

   strncpy(startup_value, value, value_length + 1);

   assert(strncmp(startup_value, value, value_length) == 0, "invariant");

   startup_recording_options_array->append(startup_value);

   return false;

 }

 const GrowableArray<const char*>* JfrOptionSet::startup_recording_options() {

   return startup_recording_options_array;

 }

 void JfrOptionSet::release_startup_recording_options() {

   if (startup_recording_options_array != NULL) {

     const int length = startup_recording_options_array->length();

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

       FREE_C_HEAP_ARRAY(char, startup_recording_options_array->at(i), mtTracing);

     }

     delete startup_recording_options_array;

     startup_recording_options_array = NULL;

   }

 }