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// Copyright 2012 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/extensions/statistics-extension.h"
#include "src/common/assert-scope.h"
#include "src/execution/isolate.h"
#include "src/heap/heap-inl.h" // crbug.com/v8/8499
#include "src/logging/counters.h"
#include "src/roots/roots.h"
namespace v8 {
namespace internal {
const char* const StatisticsExtension::kSource =
"native function getV8Statistics();";
v8::Local<v8::FunctionTemplate> StatisticsExtension::GetNativeFunctionTemplate(
v8::Isolate* isolate, v8::Local<v8::String> str) {
DCHECK_EQ(strcmp(*v8::String::Utf8Value(isolate, str), "getV8Statistics"), 0);
return v8::FunctionTemplate::New(isolate, StatisticsExtension::GetCounters);
}
static void AddCounter(v8::Isolate* isolate,
v8::Local<v8::Object> object,
StatsCounter* counter,
const char* name) {
if (counter->Enabled()) {
object
->Set(isolate->GetCurrentContext(),
v8::String::NewFromUtf8(isolate, name).ToLocalChecked(),
v8::Number::New(isolate, *counter->GetInternalPointer()))
.FromJust();
}
}
static void AddNumber(v8::Isolate* isolate, v8::Local<v8::Object> object,
double value, const char* name) {
object
->Set(isolate->GetCurrentContext(),
v8::String::NewFromUtf8(isolate, name).ToLocalChecked(),
v8::Number::New(isolate, value))
.FromJust();
}
static void AddNumber64(v8::Isolate* isolate,
v8::Local<v8::Object> object,
int64_t value,
const char* name) {
object
->Set(isolate->GetCurrentContext(),
v8::String::NewFromUtf8(isolate, name).ToLocalChecked(),
v8::Number::New(isolate, static_cast<double>(value)))
.FromJust();
}
void StatisticsExtension::GetCounters(
const v8::FunctionCallbackInfo<v8::Value>& args) {
Isolate* isolate = reinterpret_cast<Isolate*>(args.GetIsolate());
Heap* heap = isolate->heap();
if (args.Length() > 0) { // GC if first argument evaluates to true.
if (args[0]->IsBoolean() && args[0]->BooleanValue(args.GetIsolate())) {
heap->CollectAllGarbage(Heap::kNoGCFlags,
GarbageCollectionReason::kCountersExtension);
}
}
Counters* counters = isolate->counters();
v8::Local<v8::Object> result = v8::Object::New(args.GetIsolate());
struct StatisticsCounter {
v8::internal::StatsCounter* counter;
const char* name;
};
// clang-format off
const StatisticsCounter counter_list[] = {
#define ADD_COUNTER(name, caption) {counters->name(), #name},
STATS_COUNTER_LIST_1(ADD_COUNTER)
STATS_COUNTER_LIST_2(ADD_COUNTER)
STATS_COUNTER_NATIVE_CODE_LIST(ADD_COUNTER)
#undef ADD_COUNTER
}; // End counter_list array.
// clang-format on
for (size_t i = 0; i < arraysize(counter_list); i++) {
AddCounter(args.GetIsolate(), result, counter_list[i].counter,
counter_list[i].name);
}
struct StatisticNumber {
size_t number;
const char* name;
};
const StatisticNumber numbers[] = {
{heap->memory_allocator()->Size(), "total_committed_bytes"},
{heap->new_space()->Size(), "new_space_live_bytes"},
{heap->new_space()->Available(), "new_space_available_bytes"},
{heap->new_space()->CommittedMemory(), "new_space_commited_bytes"},
{heap->old_space()->Size(), "old_space_live_bytes"},
{heap->old_space()->Available(), "old_space_available_bytes"},
{heap->old_space()->CommittedMemory(), "old_space_commited_bytes"},
{heap->code_space()->Size(), "code_space_live_bytes"},
{heap->code_space()->Available(), "code_space_available_bytes"},
{heap->code_space()->CommittedMemory(), "code_space_commited_bytes"},
{heap->lo_space()->Size(), "lo_space_live_bytes"},
{heap->lo_space()->Available(), "lo_space_available_bytes"},
{heap->lo_space()->CommittedMemory(), "lo_space_commited_bytes"},
{heap->code_lo_space()->Size(), "code_lo_space_live_bytes"},
{heap->code_lo_space()->Available(), "code_lo_space_available_bytes"},
{heap->code_lo_space()->CommittedMemory(),
"code_lo_space_commited_bytes"},
};
for (size_t i = 0; i < arraysize(numbers); i++) {
AddNumber(args.GetIsolate(), result, numbers[i].number, numbers[i].name);
}
AddNumber64(args.GetIsolate(), result, heap->external_memory(),
"amount_of_external_allocated_memory");
args.GetReturnValue().Set(result);
DisallowGarbageCollection no_gc;
HeapObjectIterator iterator(
reinterpret_cast<Isolate*>(args.GetIsolate())->heap());
int reloc_info_total = 0;
int source_position_table_total = 0;
for (HeapObject obj = iterator.Next(); !obj.is_null();
obj = iterator.Next()) {
Object maybe_source_positions;
if (obj.IsCode()) {
Code code = Code::cast(obj);
reloc_info_total += code.relocation_info().Size();
maybe_source_positions = code.source_position_table();
} else if (obj.IsBytecodeArray()) {
maybe_source_positions =
BytecodeArray::cast(obj).source_position_table(kAcquireLoad);
} else {
continue;
}
if (!maybe_source_positions.IsByteArray()) continue;
ByteArray source_positions = ByteArray::cast(maybe_source_positions);
if (source_positions.length() == 0) continue;
source_position_table_total += source_positions.Size();
}
AddNumber(args.GetIsolate(), result, reloc_info_total,
"reloc_info_total_size");
AddNumber(args.GetIsolate(), result, source_position_table_total,
"source_position_table_total_size");
}
} // namespace internal
} // namespace v8
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