src,lib: expose getCategoryEnabledBuffer to use on node.http · nodejs/node@31fdb88

class ExternalReferenceRegistry;

using v8::Array;

using v8::ArrayBuffer;

using v8::BackingStore;

using v8::Context;

using v8::Function;

using v8::FunctionCallbackInfo;

using v8::NewStringType;

using v8::Object;

using v8::String;

using v8::Uint8Array;

using v8::Value;

class NodeCategorySet : public BaseObject {

env->set_trace_category_state_function(args[0].As<Function>());

}

static void GetCategoryEnabledBuffer(const FunctionCallbackInfo<Value>& args) {

CHECK(args[0]->IsString());

Isolate* isolate = args.GetIsolate();

node::Utf8Value category_name(isolate, args[0]);

const uint8_t* enabled_pointer =

TRACE_EVENT_API_GET_CATEGORY_GROUP_ENABLED(category_name.out());

uint8_t* enabled_pointer_cast = const_cast<uint8_t*>(enabled_pointer);

std::unique_ptr<BackingStore> bs = ArrayBuffer::NewBackingStore(

enabled_pointer_cast,

sizeof(*enabled_pointer_cast),

[](void*, size_t, void*) {},

nullptr);

auto ab = ArrayBuffer::New(isolate, std::move(bs));

v8::Local<Uint8Array> u8 = v8::Uint8Array::New(ab, 0, 1);

args.GetReturnValue().Set(u8);

}

void NodeCategorySet::Initialize(Local<Object> target,

Local<Value> unused,

Local<Context> context,

target,

"setTraceCategoryStateUpdateHandler",

SetTraceCategoryStateUpdateHandler);

SetMethod(

context, target, "getCategoryEnabledBuffer", GetCategoryEnabledBuffer);

Local<FunctionTemplate> category_set =

NewFunctionTemplate(isolate, NodeCategorySet::New);

ExternalReferenceRegistry* registry) {

registry->Register(GetEnabledCategories);

registry->Register(SetTraceCategoryStateUpdateHandler);

registry->Register(GetCategoryEnabledBuffer);

registry->Register(NodeCategorySet::New);

registry->Register(NodeCategorySet::Enable);

registry->Register(NodeCategorySet::Disable);