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#include "base_object-inl.h"
#include "env-inl.h"
#include "memory_tracker-inl.h"
#include "node.h"
#include "node_external_reference.h"
#include "node_internals.h"
#include "node_v8_platform-inl.h"
#include "tracing/agent.h"
#include "util-inl.h"
#include <set>
#include <string>
namespace node {
class ExternalReferenceRegistry;
using v8::Array;
using v8::Context;
using v8::Function;
using v8::FunctionCallbackInfo;
using v8::FunctionTemplate;
using v8::Local;
using v8::NewStringType;
using v8::Object;
using v8::String;
using v8::Value;
class NodeCategorySet : public BaseObject {
public:
static void Initialize(Local<Object> target,
Local<Value> unused,
Local<Context> context,
void* priv);
static void RegisterExternalReferences(ExternalReferenceRegistry* registry);
static void New(const FunctionCallbackInfo<Value>& args);
static void Enable(const FunctionCallbackInfo<Value>& args);
static void Disable(const FunctionCallbackInfo<Value>& args);
const std::set<std::string>& GetCategories() const { return categories_; }
void MemoryInfo(MemoryTracker* tracker) const override {
tracker->TrackField("categories", categories_);
}
SET_MEMORY_INFO_NAME(NodeCategorySet)
SET_SELF_SIZE(NodeCategorySet)
private:
NodeCategorySet(Environment* env,
Local<Object> wrap,
std::set<std::string>&& categories) :
BaseObject(env, wrap), categories_(std::move(categories)) {
MakeWeak();
}
bool enabled_ = false;
const std::set<std::string> categories_;
};
void NodeCategorySet::New(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
std::set<std::string> categories;
CHECK(args[0]->IsArray());
Local<Array> cats = args[0].As<Array>();
for (size_t n = 0; n < cats->Length(); n++) {
Local<Value> category;
if (!cats->Get(env->context(), n).ToLocal(&category)) return;
Utf8Value val(env->isolate(), category);
if (!*val) return;
categories.emplace(*val);
}
CHECK_NOT_NULL(GetTracingAgentWriter());
new NodeCategorySet(env, args.This(), std::move(categories));
}
void NodeCategorySet::Enable(const FunctionCallbackInfo<Value>& args) {
NodeCategorySet* category_set;
ASSIGN_OR_RETURN_UNWRAP(&category_set, args.Holder());
CHECK_NOT_NULL(category_set);
const auto& categories = category_set->GetCategories();
if (!category_set->enabled_ && !categories.empty()) {
// Starts the Tracing Agent if it wasn't started already (e.g. through
// a command line flag.)
StartTracingAgent();
GetTracingAgentWriter()->Enable(categories);
category_set->enabled_ = true;
}
}
void NodeCategorySet::Disable(const FunctionCallbackInfo<Value>& args) {
NodeCategorySet* category_set;
ASSIGN_OR_RETURN_UNWRAP(&category_set, args.Holder());
CHECK_NOT_NULL(category_set);
const auto& categories = category_set->GetCategories();
if (category_set->enabled_ && !categories.empty()) {
GetTracingAgentWriter()->Disable(categories);
category_set->enabled_ = false;
}
}
void GetEnabledCategories(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
std::string categories =
GetTracingAgentWriter()->agent()->GetEnabledCategories();
if (!categories.empty()) {
args.GetReturnValue().Set(
String::NewFromUtf8(env->isolate(),
categories.c_str(),
NewStringType::kNormal,
categories.size()).ToLocalChecked());
}
}
static void SetTraceCategoryStateUpdateHandler(
const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
CHECK(args[0]->IsFunction());
env->set_trace_category_state_function(args[0].As<Function>());
}
void NodeCategorySet::Initialize(Local<Object> target,
Local<Value> unused,
Local<Context> context,
void* priv) {
Environment* env = Environment::GetCurrent(context);
env->SetMethod(target, "getEnabledCategories", GetEnabledCategories);
env->SetMethod(
target, "setTraceCategoryStateUpdateHandler",
SetTraceCategoryStateUpdateHandler);
Local<FunctionTemplate> category_set =
env->NewFunctionTemplate(NodeCategorySet::New);
category_set->InstanceTemplate()->SetInternalFieldCount(
NodeCategorySet::kInternalFieldCount);
category_set->Inherit(BaseObject::GetConstructorTemplate(env));
env->SetProtoMethod(category_set, "enable", NodeCategorySet::Enable);
env->SetProtoMethod(category_set, "disable", NodeCategorySet::Disable);
env->SetConstructorFunction(target, "CategorySet", category_set);
Local<String> isTraceCategoryEnabled =
FIXED_ONE_BYTE_STRING(env->isolate(), "isTraceCategoryEnabled");
Local<String> trace = FIXED_ONE_BYTE_STRING(env->isolate(), "trace");
// Grab the trace and isTraceCategoryEnabled intrinsics from the binding
// object and expose those to our binding layer.
Local<Object> binding = context->GetExtrasBindingObject();
target->Set(context, isTraceCategoryEnabled,
binding->Get(context, isTraceCategoryEnabled).ToLocalChecked())
.Check();
target->Set(context, trace,
binding->Get(context, trace).ToLocalChecked()).Check();
}
void NodeCategorySet::RegisterExternalReferences(
ExternalReferenceRegistry* registry) {
registry->Register(GetEnabledCategories);
registry->Register(SetTraceCategoryStateUpdateHandler);
registry->Register(NodeCategorySet::New);
registry->Register(NodeCategorySet::Enable);
registry->Register(NodeCategorySet::Disable);
}
} // namespace node
NODE_MODULE_CONTEXT_AWARE_INTERNAL(trace_events,
node::NodeCategorySet::Initialize)
NODE_MODULE_EXTERNAL_REFERENCE(
trace_events, node::NodeCategorySet::RegisterExternalReferences)
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