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#include "node.h"
#include "env.h"
#include "env-inl.h"
#include "util.h"
#include "util-inl.h"
#include "v8.h"
namespace node {
using v8::Context;
using v8::ExternalArrayType;
using v8::Function;
using v8::FunctionCallbackInfo;
using v8::Handle;
using v8::HeapStatistics;
using v8::Isolate;
using v8::Local;
using v8::Object;
using v8::String;
using v8::Uint32;
using v8::V8;
using v8::Value;
#define HEAP_STATISTICS_PROPERTIES(V) \
V(0, total_heap_size, kTotalHeapSizeIndex) \
V(1, total_heap_size_executable, kTotalHeapSizeExecutableIndex) \
V(2, total_physical_size, kTotalPhysicalSizeIndex) \
V(3, used_heap_size, kUsedHeapSizeIndex) \
V(4, heap_size_limit, kHeapSizeLimitIndex)
#define V(a, b, c) +1
static const size_t kHeapStatisticsBufferLength = HEAP_STATISTICS_PROPERTIES(V);
#undef V
static const ExternalArrayType kHeapStatisticsBufferType =
v8::kExternalUint32Array;
void GetHeapStatistics(const FunctionCallbackInfo<Value>& args) {
CHECK(args.Length() == 1 && args[0]->IsObject());
Isolate* isolate = args.GetIsolate();
HeapStatistics s;
isolate->GetHeapStatistics(&s);
Local<Object> obj = args[0].As<Object>();
uint32_t* data =
static_cast<uint32_t*>(obj->GetIndexedPropertiesExternalArrayData());
CHECK_NE(data, nullptr);
ASSERT_EQ(obj->GetIndexedPropertiesExternalArrayDataType(),
kHeapStatisticsBufferType);
ASSERT_EQ(obj->GetIndexedPropertiesExternalArrayDataLength(),
kHeapStatisticsBufferLength);
#define V(i, name, _) \
data[i] = static_cast<uint32_t>(s.name());
HEAP_STATISTICS_PROPERTIES(V)
#undef V
}
void SetFlagsFromString(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
if (args.Length() < 1)
return env->ThrowTypeError("v8 flag is required");
if (!args[0]->IsString())
return env->ThrowTypeError("v8 flag must be a string");
String::Utf8Value flags(args[0]);
V8::SetFlagsFromString(*flags, flags.length());
}
void InitializeV8Bindings(Handle<Object> target,
Handle<Value> unused,
Handle<Context> context) {
Environment* env = Environment::GetCurrent(context);
env->SetMethod(target, "getHeapStatistics", GetHeapStatistics);
env->SetMethod(target, "setFlagsFromString", SetFlagsFromString);
target->Set(FIXED_ONE_BYTE_STRING(env->isolate(),
"kHeapStatisticsBufferLength"),
Uint32::NewFromUnsigned(env->isolate(),
kHeapStatisticsBufferLength));
target->Set(FIXED_ONE_BYTE_STRING(env->isolate(),
"kHeapStatisticsBufferType"),
Uint32::NewFromUnsigned(env->isolate(),
kHeapStatisticsBufferType));
#define V(i, _, name) \
target->Set(FIXED_ONE_BYTE_STRING(env->isolate(), #name), \
Uint32::NewFromUnsigned(env->isolate(), i));
HEAP_STATISTICS_PROPERTIES(V)
#undef V
}
} // namespace node
NODE_MODULE_CONTEXT_AWARE_BUILTIN(v8, node::InitializeV8Bindings)
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