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// Copyright 2015 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/heap/object-stats.h"
#include "src/counters.h"
#include "src/heap/heap-inl.h"
#include "src/isolate.h"
#include "src/utils.h"
namespace v8 {
namespace internal {
static base::LazyMutex object_stats_mutex = LAZY_MUTEX_INITIALIZER;
void ObjectStats::ClearObjectStats(bool clear_last_time_stats) {
memset(object_counts_, 0, sizeof(object_counts_));
memset(object_sizes_, 0, sizeof(object_sizes_));
if (clear_last_time_stats) {
memset(object_counts_last_time_, 0, sizeof(object_counts_last_time_));
memset(object_sizes_last_time_, 0, sizeof(object_sizes_last_time_));
}
}
void ObjectStats::TraceObjectStat(const char* name, int count, int size,
double time) {
int ms_count = heap()->ms_count();
PrintIsolate(isolate(),
"heap:%p, time:%f, gc:%d, type:%s, count:%d, size:%d\n",
static_cast<void*>(heap()), time, ms_count, name, count, size);
}
void ObjectStats::TraceObjectStats() {
base::LockGuard<base::Mutex> lock_guard(object_stats_mutex.Pointer());
int index;
int count;
int size;
int total_size = 0;
double time = isolate()->time_millis_since_init();
#define TRACE_OBJECT_COUNT(name) \
count = static_cast<int>(object_counts_[name]); \
size = static_cast<int>(object_sizes_[name]) / KB; \
total_size += size; \
TraceObjectStat(#name, count, size, time);
INSTANCE_TYPE_LIST(TRACE_OBJECT_COUNT)
#undef TRACE_OBJECT_COUNT
#define TRACE_OBJECT_COUNT(name) \
index = FIRST_CODE_KIND_SUB_TYPE + Code::name; \
count = static_cast<int>(object_counts_[index]); \
size = static_cast<int>(object_sizes_[index]) / KB; \
TraceObjectStat("*CODE_" #name, count, size, time);
CODE_KIND_LIST(TRACE_OBJECT_COUNT)
#undef TRACE_OBJECT_COUNT
#define TRACE_OBJECT_COUNT(name) \
index = FIRST_FIXED_ARRAY_SUB_TYPE + name; \
count = static_cast<int>(object_counts_[index]); \
size = static_cast<int>(object_sizes_[index]) / KB; \
TraceObjectStat("*FIXED_ARRAY_" #name, count, size, time);
FIXED_ARRAY_SUB_INSTANCE_TYPE_LIST(TRACE_OBJECT_COUNT)
#undef TRACE_OBJECT_COUNT
#define TRACE_OBJECT_COUNT(name) \
index = \
FIRST_CODE_AGE_SUB_TYPE + Code::k##name##CodeAge - Code::kFirstCodeAge; \
count = static_cast<int>(object_counts_[index]); \
size = static_cast<int>(object_sizes_[index]) / KB; \
TraceObjectStat("*CODE_AGE_" #name, count, size, time);
CODE_AGE_LIST_COMPLETE(TRACE_OBJECT_COUNT)
#undef TRACE_OBJECT_COUNT
}
void ObjectStats::CheckpointObjectStats() {
base::LockGuard<base::Mutex> lock_guard(object_stats_mutex.Pointer());
Counters* counters = isolate()->counters();
#define ADJUST_LAST_TIME_OBJECT_COUNT(name) \
counters->count_of_##name()->Increment( \
static_cast<int>(object_counts_[name])); \
counters->count_of_##name()->Decrement( \
static_cast<int>(object_counts_last_time_[name])); \
counters->size_of_##name()->Increment( \
static_cast<int>(object_sizes_[name])); \
counters->size_of_##name()->Decrement( \
static_cast<int>(object_sizes_last_time_[name]));
INSTANCE_TYPE_LIST(ADJUST_LAST_TIME_OBJECT_COUNT)
#undef ADJUST_LAST_TIME_OBJECT_COUNT
int index;
#define ADJUST_LAST_TIME_OBJECT_COUNT(name) \
index = FIRST_CODE_KIND_SUB_TYPE + Code::name; \
counters->count_of_CODE_TYPE_##name()->Increment( \
static_cast<int>(object_counts_[index])); \
counters->count_of_CODE_TYPE_##name()->Decrement( \
static_cast<int>(object_counts_last_time_[index])); \
counters->size_of_CODE_TYPE_##name()->Increment( \
static_cast<int>(object_sizes_[index])); \
counters->size_of_CODE_TYPE_##name()->Decrement( \
static_cast<int>(object_sizes_last_time_[index]));
CODE_KIND_LIST(ADJUST_LAST_TIME_OBJECT_COUNT)
#undef ADJUST_LAST_TIME_OBJECT_COUNT
#define ADJUST_LAST_TIME_OBJECT_COUNT(name) \
index = FIRST_FIXED_ARRAY_SUB_TYPE + name; \
counters->count_of_FIXED_ARRAY_##name()->Increment( \
static_cast<int>(object_counts_[index])); \
counters->count_of_FIXED_ARRAY_##name()->Decrement( \
static_cast<int>(object_counts_last_time_[index])); \
counters->size_of_FIXED_ARRAY_##name()->Increment( \
static_cast<int>(object_sizes_[index])); \
counters->size_of_FIXED_ARRAY_##name()->Decrement( \
static_cast<int>(object_sizes_last_time_[index]));
FIXED_ARRAY_SUB_INSTANCE_TYPE_LIST(ADJUST_LAST_TIME_OBJECT_COUNT)
#undef ADJUST_LAST_TIME_OBJECT_COUNT
#define ADJUST_LAST_TIME_OBJECT_COUNT(name) \
index = \
FIRST_CODE_AGE_SUB_TYPE + Code::k##name##CodeAge - Code::kFirstCodeAge; \
counters->count_of_CODE_AGE_##name()->Increment( \
static_cast<int>(object_counts_[index])); \
counters->count_of_CODE_AGE_##name()->Decrement( \
static_cast<int>(object_counts_last_time_[index])); \
counters->size_of_CODE_AGE_##name()->Increment( \
static_cast<int>(object_sizes_[index])); \
counters->size_of_CODE_AGE_##name()->Decrement( \
static_cast<int>(object_sizes_last_time_[index]));
CODE_AGE_LIST_COMPLETE(ADJUST_LAST_TIME_OBJECT_COUNT)
#undef ADJUST_LAST_TIME_OBJECT_COUNT
MemCopy(object_counts_last_time_, object_counts_, sizeof(object_counts_));
MemCopy(object_sizes_last_time_, object_sizes_, sizeof(object_sizes_));
ClearObjectStats();
}
Isolate* ObjectStats::isolate() { return heap()->isolate(); }
void ObjectStatsVisitor::CountFixedArray(
FixedArrayBase* fixed_array, FixedArraySubInstanceType fast_type,
FixedArraySubInstanceType dictionary_type) {
Heap* heap = fixed_array->map()->GetHeap();
if (fixed_array->map() != heap->fixed_cow_array_map() &&
fixed_array->map() != heap->fixed_double_array_map() &&
fixed_array != heap->empty_fixed_array()) {
if (fixed_array->IsDictionary()) {
heap->object_stats_->RecordFixedArraySubTypeStats(dictionary_type,
fixed_array->Size());
} else {
heap->object_stats_->RecordFixedArraySubTypeStats(fast_type,
fixed_array->Size());
}
}
}
void ObjectStatsVisitor::VisitBase(VisitorId id, Map* map, HeapObject* obj) {
Heap* heap = map->GetHeap();
int object_size = obj->Size();
heap->object_stats_->RecordObjectStats(map->instance_type(), object_size);
table_.GetVisitorById(id)(map, obj);
if (obj->IsJSObject()) {
JSObject* object = JSObject::cast(obj);
CountFixedArray(object->elements(), DICTIONARY_ELEMENTS_SUB_TYPE,
FAST_ELEMENTS_SUB_TYPE);
CountFixedArray(object->properties(), DICTIONARY_PROPERTIES_SUB_TYPE,
FAST_PROPERTIES_SUB_TYPE);
}
}
template <ObjectStatsVisitor::VisitorId id>
void ObjectStatsVisitor::Visit(Map* map, HeapObject* obj) {
VisitBase(id, map, obj);
}
template <>
void ObjectStatsVisitor::Visit<ObjectStatsVisitor::kVisitMap>(Map* map,
HeapObject* obj) {
Heap* heap = map->GetHeap();
Map* map_obj = Map::cast(obj);
DCHECK(map->instance_type() == MAP_TYPE);
DescriptorArray* array = map_obj->instance_descriptors();
if (map_obj->owns_descriptors() && array != heap->empty_descriptor_array()) {
int fixed_array_size = array->Size();
heap->object_stats_->RecordFixedArraySubTypeStats(DESCRIPTOR_ARRAY_SUB_TYPE,
fixed_array_size);
}
if (map_obj->has_code_cache()) {
CodeCache* cache = CodeCache::cast(map_obj->code_cache());
heap->object_stats_->RecordFixedArraySubTypeStats(
MAP_CODE_CACHE_SUB_TYPE, cache->default_cache()->Size());
if (!cache->normal_type_cache()->IsUndefined()) {
heap->object_stats_->RecordFixedArraySubTypeStats(
MAP_CODE_CACHE_SUB_TYPE,
FixedArray::cast(cache->normal_type_cache())->Size());
}
}
VisitBase(kVisitMap, map, obj);
}
template <>
void ObjectStatsVisitor::Visit<ObjectStatsVisitor::kVisitCode>(
Map* map, HeapObject* obj) {
Heap* heap = map->GetHeap();
int object_size = obj->Size();
DCHECK(map->instance_type() == CODE_TYPE);
Code* code_obj = Code::cast(obj);
heap->object_stats_->RecordCodeSubTypeStats(code_obj->kind(),
code_obj->GetAge(), object_size);
VisitBase(kVisitCode, map, obj);
}
template <>
void ObjectStatsVisitor::Visit<ObjectStatsVisitor::kVisitSharedFunctionInfo>(
Map* map, HeapObject* obj) {
Heap* heap = map->GetHeap();
SharedFunctionInfo* sfi = SharedFunctionInfo::cast(obj);
if (sfi->scope_info() != heap->empty_fixed_array()) {
heap->object_stats_->RecordFixedArraySubTypeStats(
SCOPE_INFO_SUB_TYPE, FixedArray::cast(sfi->scope_info())->Size());
}
VisitBase(kVisitSharedFunctionInfo, map, obj);
}
template <>
void ObjectStatsVisitor::Visit<ObjectStatsVisitor::kVisitFixedArray>(
Map* map, HeapObject* obj) {
Heap* heap = map->GetHeap();
FixedArray* fixed_array = FixedArray::cast(obj);
if (fixed_array == heap->string_table()) {
heap->object_stats_->RecordFixedArraySubTypeStats(STRING_TABLE_SUB_TYPE,
fixed_array->Size());
}
VisitBase(kVisitFixedArray, map, obj);
}
void ObjectStatsVisitor::Initialize(VisitorDispatchTable<Callback>* original) {
// Copy the original visitor table to make call-through possible. After we
// preserved a copy locally, we patch the original table to call us.
table_.CopyFrom(original);
#define COUNT_FUNCTION(id) original->Register(kVisit##id, Visit<kVisit##id>);
VISITOR_ID_LIST(COUNT_FUNCTION)
#undef COUNT_FUNCTION
}
} // namespace internal
} // namespace v8
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