/*

 * 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 "gc/shared/copyFailedInfo.hpp"

#include "gc/shared/gcHeapSummary.hpp"

#include "gc/shared/gcTimer.hpp"

#include "gc/shared/gcTrace.hpp"

#include "gc/shared/gcWhen.hpp"

#include "jfr/jfrEvents.hpp"

#include "runtime/os.hpp"

#include "utilities/macros.hpp"

// All GC dependencies against the trace framework is contained within this file.

typedef uintptr_t TraceAddress;

void GCTracer::send_garbage_collection_event() const {

  EventGarbageCollection event(UNTIMED);

  if (event.should_commit()) {

    event.set_gcId(GCId::current());

    event.set_name(_shared_gc_info.name());

    event.set_cause((u2) _shared_gc_info.cause());

    event.set_sumOfPauses(_shared_gc_info.sum_of_pauses());

    event.set_longestPause(_shared_gc_info.longest_pause());

    event.set_starttime(_shared_gc_info.start_timestamp());

    event.set_endtime(_shared_gc_info.end_timestamp());

    event.commit();

  }

}

void GCTracer::send_reference_stats_event(ReferenceType type, size_t count) const {

  EventGCReferenceStatistics e;

  if (e.should_commit()) {

      e.set_gcId(GCId::current());

      e.set_type((u1)type);

      e.set_count(count);

      e.commit();

  }

}

                                                      const MetaspaceChunkFreeListSummary& summary) const {

  EventMetaspaceChunkFreeListSummary e;

  if (e.should_commit()) {

    e.set_gcId(GCId::current());

    e.set_when(when);

    e.set_metadataType(mdtype);

    e.set_specializedChunks(summary.num_specialized_chunks());

    e.set_specializedChunksTotalSize(summary.specialized_chunks_size_in_bytes());

    e.set_smallChunks(summary.num_small_chunks());

    e.set_smallChunksTotalSize(summary.small_chunks_size_in_bytes());

    e.set_mediumChunks(summary.num_medium_chunks());

    e.set_mediumChunksTotalSize(summary.medium_chunks_size_in_bytes());

    e.set_humongousChunks(summary.num_humongous_chunks());

    e.set_humongousChunksTotalSize(summary.humongous_chunks_size_in_bytes());

    e.commit();

  }

}

void ParallelOldTracer::send_parallel_old_event() const {

  EventParallelOldGarbageCollection e(UNTIMED);

  if (e.should_commit()) {

    e.set_gcId(GCId::current());

    e.set_densePrefix((TraceAddress)_parallel_old_gc_info.dense_prefix());

    e.set_starttime(_shared_gc_info.start_timestamp());

    e.set_endtime(_shared_gc_info.end_timestamp());

    e.commit();

  }

}

void YoungGCTracer::send_young_gc_event() const {

  EventYoungGarbageCollection e(UNTIMED);

  if (e.should_commit()) {

    e.set_gcId(GCId::current());

    e.set_tenuringThreshold(_tenuring_threshold);

    e.set_starttime(_shared_gc_info.start_timestamp());

    e.set_endtime(_shared_gc_info.end_timestamp());

    e.commit();

  }

}

bool YoungGCTracer::should_send_promotion_in_new_plab_event() const {

  return EventPromoteObjectInNewPLAB::is_enabled();

}

bool YoungGCTracer::should_send_promotion_outside_plab_event() const {

  return EventPromoteObjectOutsidePLAB::is_enabled();

}

void YoungGCTracer::send_promotion_in_new_plab_event(Klass* klass, size_t obj_size,

                                                     uint age, bool tenured,

                                                     size_t plab_size) const {

  EventPromoteObjectInNewPLAB event;

  if (event.should_commit()) {

    event.set_gcId(GCId::current());

    event.set_objectClass(klass);

    event.set_objectSize(obj_size);

    event.set_tenured(tenured);

    event.set_tenuringAge(age);

    event.set_plabSize(plab_size);

    event.commit();

  }

}

void YoungGCTracer::send_promotion_outside_plab_event(Klass* klass, size_t obj_size,

                                                      uint age, bool tenured) const {

  EventPromoteObjectOutsidePLAB event;

  if (event.should_commit()) {

    event.set_gcId(GCId::current());

    event.set_objectClass(klass);

    event.set_objectSize(obj_size);

    event.set_tenured(tenured);

    event.set_tenuringAge(age);

    event.commit();

  }

}

void OldGCTracer::send_old_gc_event() const {

  EventOldGarbageCollection e(UNTIMED);

  if (e.should_commit()) {

    e.set_gcId(GCId::current());

    e.set_starttime(_shared_gc_info.start_timestamp());

    e.set_endtime(_shared_gc_info.end_timestamp());

    e.commit();

  }

}

static JfrStructCopyFailed to_struct(const CopyFailedInfo& cf_info) {

  JfrStructCopyFailed failed_info;

  failed_info.set_objectCount(cf_info.failed_count());

  failed_info.set_firstSize(cf_info.first_size());

  failed_info.set_smallestSize(cf_info.smallest_size());

  failed_info.set_totalSize(cf_info.total_size());

  return failed_info;

}

void YoungGCTracer::send_promotion_failed_event(const PromotionFailedInfo& pf_info) const {

  EventPromotionFailed e;

  if (e.should_commit()) {

    e.set_gcId(GCId::current());

    e.set_promotionFailed(to_struct(pf_info));

    e.set_thread(pf_info.thread_trace_id());

    e.commit();

  }

}

// Common to CMS and G1

void OldGCTracer::send_concurrent_mode_failure_event() {

  EventConcurrentModeFailure e;

  if (e.should_commit()) {

    e.set_gcId(GCId::current());

    e.commit();

  }

}

static JfrStructVirtualSpace to_struct(const VirtualSpaceSummary& summary) {

  JfrStructVirtualSpace space;

  space.set_start((TraceAddress)summary.start());

  space.set_committedEnd((TraceAddress)summary.committed_end());

  space.set_committedSize(summary.committed_size());

  space.set_reservedEnd((TraceAddress)summary.reserved_end());

  space.set_reservedSize(summary.reserved_size());

  return space;

}

static JfrStructObjectSpace to_struct(const SpaceSummary& summary) {

  JfrStructObjectSpace space;

  space.set_start((TraceAddress)summary.start());

  space.set_end((TraceAddress)summary.end());

  space.set_used(summary.used());

  space.set_size(summary.size());

  return space;

}

class GCHeapSummaryEventSender : public GCHeapSummaryVisitor {

  GCWhen::Type _when;

 public:

  GCHeapSummaryEventSender(GCWhen::Type when) : _when(when) {}

  void visit(const GCHeapSummary* heap_summary) const {

    const VirtualSpaceSummary& heap_space = heap_summary->heap();

    EventGCHeapSummary e;

    if (e.should_commit()) {

      e.set_gcId(GCId::current());

      e.set_when((u1)_when);

      e.set_heapSpace(to_struct(heap_space));

      e.set_heapUsed(heap_summary->used());

      e.commit();

    }

  }

  void visit(const G1HeapSummary* g1_heap_summary) const {

    visit((GCHeapSummary*)g1_heap_summary);

    EventG1HeapSummary e;

    if (e.should_commit()) {

      e.set_gcId(GCId::current());

      e.set_when((u1)_when);

      e.set_edenUsedSize(g1_heap_summary->edenUsed());

      e.set_edenTotalSize(g1_heap_summary->edenCapacity());

      e.set_survivorUsedSize(g1_heap_summary->survivorUsed());

      e.set_numberOfRegions(g1_heap_summary->numberOfRegions());

      e.commit();

    }

  }

  void visit(const PSHeapSummary* ps_heap_summary) const {

    visit((GCHeapSummary*)ps_heap_summary);

    const VirtualSpaceSummary& old_summary = ps_heap_summary->old();

    const SpaceSummary& old_space = ps_heap_summary->old_space();

    const VirtualSpaceSummary& young_summary = ps_heap_summary->young();

    const SpaceSummary& eden_space = ps_heap_summary->eden();

    const SpaceSummary& from_space = ps_heap_summary->from();

    const SpaceSummary& to_space = ps_heap_summary->to();

    EventPSHeapSummary e;

    if (e.should_commit()) {

      e.set_gcId(GCId::current());

      e.set_when((u1)_when);

      e.set_oldSpace(to_struct(ps_heap_summary->old()));

      e.set_oldObjectSpace(to_struct(ps_heap_summary->old_space()));

      e.set_youngSpace(to_struct(ps_heap_summary->young()));

      e.set_edenSpace(to_struct(ps_heap_summary->eden()));

      e.set_fromSpace(to_struct(ps_heap_summary->from()));

      e.set_toSpace(to_struct(ps_heap_summary->to()));

      e.commit();

    }

  }

};

void GCTracer::send_gc_heap_summary_event(GCWhen::Type when, const GCHeapSummary& heap_summary) const {

  GCHeapSummaryEventSender visitor(when);

  heap_summary.accept(&visitor);

}

static JfrStructMetaspaceSizes to_struct(const MetaspaceSizes& sizes) {

  JfrStructMetaspaceSizes meta_sizes;

  meta_sizes.set_committed(sizes.committed());

  meta_sizes.set_used(sizes.used());

  meta_sizes.set_reserved(sizes.reserved());

  return meta_sizes;

}

void GCTracer::send_meta_space_summary_event(GCWhen::Type when, const MetaspaceSummary& meta_space_summary) const {

  EventMetaspaceSummary e;

  if (e.should_commit()) {

    e.set_gcId(GCId::current());

    e.set_when((u1) when);

    e.set_gcThreshold(meta_space_summary.capacity_until_GC());

    e.set_metaspace(to_struct(meta_space_summary.meta_space()));

    e.set_dataSpace(to_struct(meta_space_summary.data_space()));

    e.set_classSpace(to_struct(meta_space_summary.class_space()));

    e.commit();

  }

}

class PhaseSender : public PhaseVisitor {

  void visit_pause(GCPhase* phase) {

    assert(phase->level() < PhasesStack::PHASE_LEVELS, "Need more event types for PausePhase");

    switch (phase->level()) {

      case 0: send_phase<EventGCPhasePause>(phase); break;

      case 1: send_phase<EventGCPhasePauseLevel1>(phase); break;

      case 2: send_phase<EventGCPhasePauseLevel2>(phase); break;

      case 3: send_phase<EventGCPhasePauseLevel3>(phase); break;

      case 4: send_phase<EventGCPhasePauseLevel4>(phase); break;

      default: /* Ignore sending this phase */ break;

    }

  }

  void visit_concurrent(GCPhase* phase) {

    assert(phase->level() < 1, "There is only one level for ConcurrentPhase");

    switch (phase->level()) {

      case 0: send_phase<EventGCPhaseConcurrent>(phase); break;

      default: /* Ignore sending this phase */ break;

    }

  }

 public:

  template<typename T>

  void send_phase(GCPhase* phase) {

    T event(UNTIMED);

    if (event.should_commit()) {

      event.set_gcId(GCId::current());

      event.set_name(phase->name());

      event.set_starttime(phase->start());

      event.set_endtime(phase->end());

      event.commit();

    }

  }

  void visit(GCPhase* phase) {

    if (phase->type() == GCPhase::PausePhaseType) {

      visit_pause(phase);

    } else {

      assert(phase->type() == GCPhase::ConcurrentPhaseType, "Should be ConcurrentPhaseType");

      visit_concurrent(phase);

    }

  }

};

void GCTracer::send_phase_events(TimePartitions* time_partitions) const {

  PhaseSender phase_reporter;

  TimePartitionPhasesIterator iter(time_partitions);

  while (iter.has_next()) {

    GCPhase* phase = iter.next();

    phase->accept(&phase_reporter);

  }

}