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#include "base_object-inl.h"
#include "debug_utils.h"
#include "inspector_agent.h"
#include "node_internals.h"
#include "v8-inspector.h"
namespace node {
namespace coverage {
using v8::Context;
using v8::Function;
using v8::FunctionCallbackInfo;
using v8::HandleScope;
using v8::Isolate;
using v8::Local;
using v8::MaybeLocal;
using v8::NewStringType;
using v8::Object;
using v8::ObjectTemplate;
using v8::String;
using v8::Value;
using v8_inspector::StringBuffer;
using v8_inspector::StringView;
std::unique_ptr<StringBuffer> ToProtocolString(Isolate* isolate,
Local<Value> value) {
TwoByteValue buffer(isolate, value);
return StringBuffer::create(StringView(*buffer, buffer.length()));
}
class V8CoverageConnection : public BaseObject {
public:
class V8CoverageSessionDelegate : public inspector::InspectorSessionDelegate {
public:
explicit V8CoverageSessionDelegate(V8CoverageConnection* connection)
: connection_(connection) {}
void SendMessageToFrontend(
const v8_inspector::StringView& message) override {
Environment* env = connection_->env();
Local<Function> fn = connection_->env()->on_coverage_message_function();
bool ending = !fn.IsEmpty();
Debug(env,
DebugCategory::COVERAGE,
"Sending message to frontend, ending = %s\n",
ending ? "true" : "false");
if (!ending) {
return;
}
Isolate* isolate = env->isolate();
HandleScope handle_scope(isolate);
Context::Scope context_scope(env->context());
MaybeLocal<String> v8string =
String::NewFromTwoByte(isolate,
message.characters16(),
NewStringType::kNormal,
message.length());
Local<Value> args[] = {v8string.ToLocalChecked().As<Value>()};
USE(MakeCallback(isolate,
connection_->object(),
fn,
arraysize(args),
args,
async_context{0, 0}));
}
private:
V8CoverageConnection* connection_;
};
SET_MEMORY_INFO_NAME(V8CoverageConnection)
SET_SELF_SIZE(V8CoverageConnection)
void MemoryInfo(MemoryTracker* tracker) const override {
tracker->TrackFieldWithSize(
"session", sizeof(*session_), "InspectorSession");
}
explicit V8CoverageConnection(Environment* env)
: BaseObject(env, env->coverage_connection()), session_(nullptr) {
inspector::Agent* inspector = env->inspector_agent();
std::unique_ptr<inspector::InspectorSession> session = inspector->Connect(
std::make_unique<V8CoverageSessionDelegate>(this), false);
session_ = std::move(session);
MakeWeak();
}
void Start() {
Debug(this->env(),
DebugCategory::COVERAGE,
"Sending Profiler.startPreciseCoverage\n");
Isolate* isolate = this->env()->isolate();
Local<Value> enable = FIXED_ONE_BYTE_STRING(
isolate, "{\"id\": 1, \"method\": \"Profiler.enable\"}");
Local<Value> start = FIXED_ONE_BYTE_STRING(
isolate,
"{"
"\"id\": 2,"
"\"method\": \"Profiler.startPreciseCoverage\","
"\"params\": {\"callCount\": true, \"detailed\": true}"
"}");
session_->Dispatch(ToProtocolString(isolate, enable)->string());
session_->Dispatch(ToProtocolString(isolate, start)->string());
}
void End() {
Debug(this->env(),
DebugCategory::COVERAGE,
"Sending Profiler.takePreciseCoverage\n");
Isolate* isolate = this->env()->isolate();
Local<Value> end =
FIXED_ONE_BYTE_STRING(isolate,
"{"
"\"id\": 3,"
"\"method\": \"Profiler.takePreciseCoverage\""
"}");
session_->Dispatch(ToProtocolString(isolate, end)->string());
}
friend class V8CoverageSessionDelegate;
private:
std::unique_ptr<inspector::InspectorSession> session_;
};
bool StartCoverageCollection(Environment* env) {
HandleScope scope(env->isolate());
Local<ObjectTemplate> t = ObjectTemplate::New(env->isolate());
t->SetInternalFieldCount(1);
Local<Object> obj;
if (!t->NewInstance(env->context()).ToLocal(&obj)) {
return false;
}
obj->SetAlignedPointerInInternalField(0, nullptr);
CHECK(env->coverage_connection().IsEmpty());
env->set_coverage_connection(obj);
V8CoverageConnection* connection = new V8CoverageConnection(env);
connection->Start();
return true;
}
static void EndCoverageCollection(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
CHECK(args[0]->IsFunction());
Debug(env, DebugCategory::COVERAGE, "Ending coverage collection\n");
env->set_on_coverage_message_function(args[0].As<Function>());
V8CoverageConnection* connection =
Unwrap<V8CoverageConnection>(env->coverage_connection());
CHECK_NOT_NULL(connection);
connection->End();
}
static void Initialize(Local<Object> target,
Local<Value> unused,
Local<Context> context,
void* priv) {
Environment* env = Environment::GetCurrent(context);
env->SetMethod(target, "end", EndCoverageCollection);
}
} // namespace coverage
} // namespace node
NODE_MODULE_CONTEXT_AWARE_INTERNAL(coverage, node::coverage::Initialize)
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