/*

 * Copyright (c) 2012, 2019, 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 "jvm.h"

#include "classfile/classLoaderDataGraph.hpp"

#include "classfile/classLoaderStats.hpp"

#include "classfile/javaClasses.hpp"

#include "classfile/stringTable.hpp"

#include "classfile/symbolTable.hpp"

#include "classfile/systemDictionary.hpp"

#include "code/codeCache.hpp"

#include "compiler/compileBroker.hpp"

#include "gc/shared/gcConfiguration.hpp"

#include "gc/shared/gcTrace.hpp"

#include "gc/shared/gcVMOperations.hpp"

#include "gc/shared/objectCountEventSender.hpp"

#include "jfr/jfrEvents.hpp"

#include "jfr/periodic/jfrModuleEvent.hpp"

#include "jfr/periodic/jfrOSInterface.hpp"

#include "jfr/periodic/jfrThreadCPULoadEvent.hpp"

#include "jfr/periodic/jfrThreadDumpEvent.hpp"

#include "jfr/periodic/jfrNetworkUtilization.hpp"

#include "jfr/recorder/jfrRecorder.hpp"

#include "jfr/support/jfrThreadId.hpp"

#include "jfr/utilities/jfrTime.hpp"

#include "jfrfiles/jfrPeriodic.hpp"

#include "logging/log.hpp"

#include "memory/heapInspection.hpp"

#include "memory/resourceArea.hpp"

#include "oops/oop.inline.hpp"

#include "runtime/arguments.hpp"

#include "runtime/flags/jvmFlag.hpp"

#include "runtime/globals.hpp"

#include "runtime/os.hpp"

#include "runtime/os_perf.hpp"

#include "runtime/thread.inline.hpp"

#include "runtime/sweeper.hpp"

#include "runtime/vmThread.hpp"

#include "services/classLoadingService.hpp"

#include "services/management.hpp"

#include "services/threadService.hpp"

#include "utilities/exceptions.hpp"

#include "utilities/globalDefinitions.hpp"

#if INCLUDE_G1GC

#include "gc/g1/g1HeapRegionEventSender.hpp"

#endif

#if INCLUDE_SHENANDOAHGC

#include "gc/shenandoah/shenandoahJfrSupport.hpp"

#endif

/**

 *  JfrPeriodic class

 *  Implementation of declarations in

 *  xsl generated traceRequestables.hpp

 */

#define TRACE_REQUEST_FUNC(id)    void JfrPeriodicEventSet::request##id(void)

TRACE_REQUEST_FUNC(JVMInformation) {

  ResourceMark rm;

  EventJVMInformation event;

  event.set_jvmName(VM_Version::vm_name());

  event.set_jvmVersion(VM_Version::internal_vm_info_string());

  event.set_javaArguments(Arguments::java_command());

  event.set_jvmArguments(Arguments::jvm_args());

  event.set_jvmFlags(Arguments::jvm_flags());

  event.set_jvmStartTime(Management::vm_init_done_time());

  event.set_pid(os::current_process_id());

  event.commit();

 }

TRACE_REQUEST_FUNC(OSInformation) {

  ResourceMark rm;

  char* os_name = NEW_RESOURCE_ARRAY(char, 2048);

  JfrOSInterface::os_version(&os_name);

  EventOSInformation event;

  event.set_osVersion(os_name);

  event.commit();

}

TRACE_REQUEST_FUNC(VirtualizationInformation) {

  EventVirtualizationInformation event;

  event.set_name(JfrOSInterface::virtualization_name());

  event.commit();

}

TRACE_REQUEST_FUNC(ModuleRequire) {

  JfrModuleEvent::generate_module_dependency_events();

}

TRACE_REQUEST_FUNC(ModuleExport) {

  JfrModuleEvent::generate_module_export_events();

}

/*

 * This is left empty on purpose, having ExecutionSample as a requestable

 * is a way of getting the period. The period is passed to ThreadSampling::update_period.

 * Implementation in jfrSamples.cpp

 */

TRACE_REQUEST_FUNC(ExecutionSample) {

}

TRACE_REQUEST_FUNC(NativeMethodSample) {

}

TRACE_REQUEST_FUNC(ThreadDump) {

  ResourceMark rm;

  EventThreadDump event;

  event.set_result(JfrDcmdEvent::thread_dump());

  event.commit();

}

static int _native_library_callback(const char* name, address base, address top, void *param) {

  EventNativeLibrary event(UNTIMED);

  event.set_name(name);

  event.set_baseAddress((u8)base);

  event.set_topAddress((u8)top);

  event.set_endtime(*(JfrTicks*) param);

  event.commit();

  return 0;

}

TRACE_REQUEST_FUNC(NativeLibrary) {

  JfrTicks ts= JfrTicks::now();

  os::get_loaded_modules_info(&_native_library_callback, (void *)&ts);

}

TRACE_REQUEST_FUNC(InitialEnvironmentVariable) {

  JfrOSInterface::generate_initial_environment_variable_events();

}

TRACE_REQUEST_FUNC(CPUInformation) {

  CPUInformation cpu_info;

  int ret_val = JfrOSInterface::cpu_information(cpu_info);

  if (ret_val == OS_ERR) {

    log_debug(jfr, system)( "Unable to generate requestable event CPUInformation");

    return;

  }

  if (ret_val == FUNCTIONALITY_NOT_IMPLEMENTED) {

     return;

  }

  if (ret_val == OS_OK) {

    EventCPUInformation event;

    event.set_cpu(cpu_info.cpu_name());

    event.set_description(cpu_info.cpu_description());

    event.set_sockets(cpu_info.number_of_sockets());

    event.set_cores(cpu_info.number_of_cores());

    event.set_hwThreads(cpu_info.number_of_hardware_threads());

    event.commit();

  }

}

TRACE_REQUEST_FUNC(CPULoad) {

  double u = 0; // user time

  double s = 0; // kernel time

  double t = 0; // total time

  int ret_val = JfrOSInterface::cpu_loads_process(&u, &s, &t);

  if (ret_val == OS_ERR) {

    log_debug(jfr, system)( "Unable to generate requestable event CPULoad");

    return;

  }

  if (ret_val == OS_OK) {

    EventCPULoad event;

    event.set_jvmUser((float)u);

    event.set_jvmSystem((float)s);

    event.set_machineTotal((float)t);

    event.commit();

  }

}

TRACE_REQUEST_FUNC(ThreadCPULoad) {

  JfrThreadCPULoadEvent::send_events();

}

TRACE_REQUEST_FUNC(NetworkUtilization) {

  JfrNetworkUtilization::send_events();

}

TRACE_REQUEST_FUNC(CPUTimeStampCounter) {

  EventCPUTimeStampCounter event;

  event.set_fastTimeEnabled(JfrTime::is_ft_enabled());

  event.set_fastTimeAutoEnabled(JfrTime::is_ft_supported());

  event.set_osFrequency(os::elapsed_frequency());

  event.set_fastTimeFrequency(JfrTime::frequency());

  event.commit();

}

TRACE_REQUEST_FUNC(SystemProcess) {

  char pid_buf[16];

  SystemProcess* processes = NULL;

  int num_of_processes = 0;

  JfrTicks start_time = JfrTicks::now();

  int ret_val = JfrOSInterface::system_processes(&processes, &num_of_processes);

  if (ret_val == OS_ERR) {

    log_debug(jfr, system)( "Unable to generate requestable event SystemProcesses");

    return;

  }

  JfrTicks end_time = JfrTicks::now();

  if (ret_val == FUNCTIONALITY_NOT_IMPLEMENTED) {

    return;

  }

  if (ret_val == OS_OK) {

    // feature is implemented, write real event

    while (processes != NULL) {

      SystemProcess* tmp = processes;

      const char* info = processes->command_line();

      if (info == NULL) {

         info = processes->path();

      }

      if (info == NULL) {

         info = processes->name();

      }

      if (info == NULL) {

         info = "?";

      }

      jio_snprintf(pid_buf, sizeof(pid_buf), "%d", processes->pid());

      EventSystemProcess event(UNTIMED);

      event.set_pid(pid_buf);

      event.set_commandLine(info);

      event.set_starttime(start_time);

      event.set_endtime(end_time);

      event.commit();

      processes = processes->next();

      delete tmp;

    }

  }

}

TRACE_REQUEST_FUNC(ThreadContextSwitchRate) {

  double rate = 0.0;

  int ret_val = JfrOSInterface::context_switch_rate(&rate);

  if (ret_val == OS_ERR) {

    log_debug(jfr, system)( "Unable to generate requestable event ThreadContextSwitchRate");

    return;

  }

  if (ret_val == FUNCTIONALITY_NOT_IMPLEMENTED) {

    return;

  }

  if (ret_val == OS_OK) {

    EventThreadContextSwitchRate event;

    event.set_switchRate((float)rate + 0.0f);

    event.commit();

  }

}

#define SEND_FLAGS_OF_TYPE(eventType, flagType)                   \

  do {                                                            \

    JVMFlag *flag = JVMFlag::flags;                               \

    while (flag->_name != NULL) {                                 \

      if (flag->is_ ## flagType()) {                              \

        if (flag->is_unlocked()) {                                \

          Event ## eventType event;                               \

          event.set_name(flag->_name);                            \

          event.set_value(flag->get_ ## flagType());              \

          event.set_origin(flag->get_origin());                   \

          event.commit();                                         \

        }                                                         \

      }                                                           \

      ++flag;                                                     \

    }                                                             \

  } while (0)

TRACE_REQUEST_FUNC(IntFlag) {

  SEND_FLAGS_OF_TYPE(IntFlag, int);

}

TRACE_REQUEST_FUNC(UnsignedIntFlag) {

  SEND_FLAGS_OF_TYPE(UnsignedIntFlag, uint);

}

TRACE_REQUEST_FUNC(LongFlag) {

  SEND_FLAGS_OF_TYPE(LongFlag, intx);

}

TRACE_REQUEST_FUNC(UnsignedLongFlag) {

  SEND_FLAGS_OF_TYPE(UnsignedLongFlag, uintx);

  SEND_FLAGS_OF_TYPE(UnsignedLongFlag, uint64_t);

  SEND_FLAGS_OF_TYPE(UnsignedLongFlag, size_t);

}

TRACE_REQUEST_FUNC(DoubleFlag) {

  SEND_FLAGS_OF_TYPE(DoubleFlag, double);

}

TRACE_REQUEST_FUNC(BooleanFlag) {

  SEND_FLAGS_OF_TYPE(BooleanFlag, bool);

}

TRACE_REQUEST_FUNC(StringFlag) {

  SEND_FLAGS_OF_TYPE(StringFlag, ccstr);

}

class VM_GC_SendObjectCountEvent : public VM_GC_HeapInspection {

 public:

  VM_GC_SendObjectCountEvent() : VM_GC_HeapInspection(NULL, true) {}

  virtual void doit() {

    ObjectCountEventSender::enable_requestable_event();

    collect();

    ObjectCountEventSender::disable_requestable_event();

  }

};

TRACE_REQUEST_FUNC(ObjectCount) {

  VM_GC_SendObjectCountEvent op;

  VMThread::execute(&op);

}

TRACE_REQUEST_FUNC(G1HeapRegionInformation) {

  G1GC_ONLY(G1HeapRegionEventSender::send_events());

}

// Java Mission Control (JMC) uses (Java) Long.MIN_VALUE to describe that a

// long value is undefined.

static jlong jmc_undefined_long = min_jlong;

TRACE_REQUEST_FUNC(GCConfiguration) {

  GCConfiguration conf;

  jlong pause_target = conf.has_pause_target_default_value() ? jmc_undefined_long : conf.pause_target();

  EventGCConfiguration event;

  event.set_youngCollector(conf.young_collector());

  event.set_oldCollector(conf.old_collector());

  event.set_parallelGCThreads(conf.num_parallel_gc_threads());

  event.set_concurrentGCThreads(conf.num_concurrent_gc_threads());

  event.set_usesDynamicGCThreads(conf.uses_dynamic_gc_threads());

  event.set_isExplicitGCConcurrent(conf.is_explicit_gc_concurrent());

  event.set_isExplicitGCDisabled(conf.is_explicit_gc_disabled());

  event.set_gcTimeRatio(conf.gc_time_ratio());

  event.set_pauseTarget((s8)pause_target);

  event.commit();

}

TRACE_REQUEST_FUNC(GCTLABConfiguration) {

  GCTLABConfiguration conf;

  EventGCTLABConfiguration event;

  event.set_usesTLABs(conf.uses_tlabs());

  event.set_minTLABSize(conf.min_tlab_size());

  event.set_tlabRefillWasteLimit(conf.tlab_refill_waste_limit());

  event.commit();

}

TRACE_REQUEST_FUNC(GCSurvivorConfiguration) {

  GCSurvivorConfiguration conf;

  EventGCSurvivorConfiguration event;

  event.set_maxTenuringThreshold(conf.max_tenuring_threshold());

  event.set_initialTenuringThreshold(conf.initial_tenuring_threshold());

  event.commit();

}

TRACE_REQUEST_FUNC(GCHeapConfiguration) {

  GCHeapConfiguration conf;

  EventGCHeapConfiguration event;

  event.set_minSize(conf.min_size());

  event.set_maxSize(conf.max_size());

  event.set_initialSize(conf.initial_size());

  event.set_usesCompressedOops(conf.uses_compressed_oops());

  event.set_compressedOopsMode(conf.narrow_oop_mode());

  event.set_objectAlignment(conf.object_alignment_in_bytes());

  event.set_heapAddressBits(conf.heap_address_size_in_bits());

  event.commit();

}

TRACE_REQUEST_FUNC(YoungGenerationConfiguration) {

  GCYoungGenerationConfiguration conf;

  jlong max_size = conf.has_max_size_default_value() ? jmc_undefined_long : conf.max_size();

  EventYoungGenerationConfiguration event;

  event.set_maxSize((u8)max_size);

  event.set_minSize(conf.min_size());

  event.set_newRatio(conf.new_ratio());

  event.commit();

}

TRACE_REQUEST_FUNC(InitialSystemProperty) {

  SystemProperty* p = Arguments::system_properties();

  JfrTicks time_stamp = JfrTicks::now();

  while (p !=  NULL) {

    if (!p->internal()) {

      EventInitialSystemProperty event(UNTIMED);

      event.set_key(p->key());

      event.set_value(p->value());

      event.set_endtime(time_stamp);

      event.commit();

    }

    p = p->next();

  }

}

TRACE_REQUEST_FUNC(ThreadAllocationStatistics) {

  ResourceMark rm;

  int initial_size = Threads::number_of_threads();

  GrowableArray<jlong> allocated(initial_size);

  GrowableArray<traceid> thread_ids(initial_size);

  JfrTicks time_stamp = JfrTicks::now();

  }

  // Write allocation statistics to buffer.

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

    EventThreadAllocationStatistics event(UNTIMED);

    event.set_allocated(allocated.at(i));

    event.set_thread(thread_ids.at(i));

    event.set_endtime(time_stamp);

    event.commit();

  }

}

/**

 *  PhysicalMemory event represents:

 *

 *  @totalSize == The amount of physical memory (hw) installed and reported by the OS, in bytes.

 *  @usedSize  == The amount of physical memory currently in use in the system (reserved/committed), in bytes.

 *

 *  Both fields are systemwide, i.e. represents the entire OS/HW environment.

 *  These fields do not include virtual memory.

 *

 *  If running inside a guest OS on top of a hypervisor in a virtualized environment,

 *  the total memory reported is the amount of memory configured for the guest OS by the hypervisor.

 */

TRACE_REQUEST_FUNC(PhysicalMemory) {

  u8 totalPhysicalMemory = os::physical_memory();

  EventPhysicalMemory event;

  event.set_totalSize(totalPhysicalMemory);

  event.set_usedSize(totalPhysicalMemory - os::available_memory());

  event.commit();

}

TRACE_REQUEST_FUNC(JavaThreadStatistics) {

  EventJavaThreadStatistics event;

  event.set_activeCount(ThreadService::get_live_thread_count());

  event.set_daemonCount(ThreadService::get_daemon_thread_count());

  event.set_accumulatedCount(ThreadService::get_total_thread_count());

  event.set_peakCount(ThreadService::get_peak_thread_count());

  event.commit();

}

TRACE_REQUEST_FUNC(ClassLoadingStatistics) {

  EventClassLoadingStatistics event;

  event.set_loadedClassCount(ClassLoadingService::loaded_class_count());

  event.set_unloadedClassCount(ClassLoadingService::unloaded_class_count());

  event.commit();

}

class JfrClassLoaderStatsClosure : public ClassLoaderStatsClosure {

public:

  JfrClassLoaderStatsClosure() : ClassLoaderStatsClosure(NULL) {}

  bool do_entry(oop const& key, ClassLoaderStats* const& cls) {

    const ClassLoaderData* this_cld = cls->_class_loader != NULL ?

      java_lang_ClassLoader::loader_data_acquire(cls->_class_loader) : NULL;

    const ClassLoaderData* parent_cld = cls->_parent != NULL ?

      java_lang_ClassLoader::loader_data_acquire(cls->_parent) : NULL;

    EventClassLoaderStatistics event;

    event.set_classLoader(this_cld);

    event.set_parentClassLoader(parent_cld);

    event.set_classLoaderData((intptr_t)cls->_cld);

    event.set_classCount(cls->_classes_count);

    event.set_chunkSize(cls->_chunk_sz);

    event.set_blockSize(cls->_block_sz);

    event.set_unsafeAnonymousClassCount(cls->_anon_classes_count);

    event.set_unsafeAnonymousChunkSize(cls->_anon_chunk_sz);

    event.set_unsafeAnonymousBlockSize(cls->_anon_block_sz);

    event.commit();

    return true;

  }

  void createEvents(void) {

    _stats->iterate(this);

  }

};

class JfrClassLoaderStatsVMOperation : public ClassLoaderStatsVMOperation {

 public:

  JfrClassLoaderStatsVMOperation() : ClassLoaderStatsVMOperation(NULL) { }

  void doit() {

    JfrClassLoaderStatsClosure clsc;

    ClassLoaderDataGraph::loaded_cld_do(&clsc);

    clsc.createEvents();

  }

};

TRACE_REQUEST_FUNC(ClassLoaderStatistics) {

  JfrClassLoaderStatsVMOperation op;

  VMThread::execute(&op);

}

template<typename EVENT>

static void emit_table_statistics(TableStatistics statistics) {

  EVENT event;

  event.set_bucketCount(statistics._number_of_buckets);

  event.set_entryCount(statistics._number_of_entries);

  event.set_totalFootprint(statistics._total_footprint);

  event.set_bucketCountMaximum(statistics._maximum_bucket_size);

  event.set_bucketCountAverage(statistics._average_bucket_size);

  event.set_bucketCountVariance(statistics._variance_of_bucket_size);

  event.set_bucketCountStandardDeviation(statistics._stddev_of_bucket_size);

  event.set_insertionRate(statistics._add_rate);

  event.set_removalRate(statistics._remove_rate);

  event.commit();