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#include "async-wrap.h"
#include "async-wrap-inl.h"
#include "env.h"
#include "env-inl.h"
#include "util.h"
#include "util-inl.h"
#include "v8.h"
#include "v8-profiler.h"
using v8::Boolean;
using v8::Context;
using v8::Function;
using v8::FunctionCallbackInfo;
using v8::HandleScope;
using v8::HeapProfiler;
using v8::Integer;
using v8::Isolate;
using v8::Local;
using v8::MaybeLocal;
using v8::Number;
using v8::Object;
using v8::RetainedObjectInfo;
using v8::TryCatch;
using v8::Value;
namespace node {
static const char* const provider_names[] = {
#define V(PROVIDER) \
#PROVIDER,
NODE_ASYNC_PROVIDER_TYPES(V)
#undef V
};
class RetainedAsyncInfo: public RetainedObjectInfo {
public:
explicit RetainedAsyncInfo(uint16_t class_id, AsyncWrap* wrap);
void Dispose() override;
bool IsEquivalent(RetainedObjectInfo* other) override;
intptr_t GetHash() override;
const char* GetLabel() override;
intptr_t GetSizeInBytes() override;
private:
const char* label_;
const AsyncWrap* wrap_;
const int length_;
};
RetainedAsyncInfo::RetainedAsyncInfo(uint16_t class_id, AsyncWrap* wrap)
: label_(provider_names[class_id - NODE_ASYNC_ID_OFFSET]),
wrap_(wrap),
length_(wrap->self_size()) {
}
void RetainedAsyncInfo::Dispose() {
delete this;
}
bool RetainedAsyncInfo::IsEquivalent(RetainedObjectInfo* other) {
return label_ == other->GetLabel() &&
wrap_ == static_cast<RetainedAsyncInfo*>(other)->wrap_;
}
intptr_t RetainedAsyncInfo::GetHash() {
return reinterpret_cast<intptr_t>(wrap_);
}
const char* RetainedAsyncInfo::GetLabel() {
return label_;
}
intptr_t RetainedAsyncInfo::GetSizeInBytes() {
return length_;
}
RetainedObjectInfo* WrapperInfo(uint16_t class_id, Local<Value> wrapper) {
// No class_id should be the provider type of NONE.
CHECK_NE(NODE_ASYNC_ID_OFFSET, class_id);
CHECK(wrapper->IsObject());
CHECK(!wrapper.IsEmpty());
Local<Object> object = wrapper.As<Object>();
CHECK_GT(object->InternalFieldCount(), 0);
AsyncWrap* wrap = Unwrap<AsyncWrap>(object);
CHECK_NE(nullptr, wrap);
return new RetainedAsyncInfo(class_id, wrap);
}
// end RetainedAsyncInfo
static void EnableHooksJS(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
Local<Function> init_fn = env->async_hooks_init_function();
if (init_fn.IsEmpty() || !init_fn->IsFunction())
return env->ThrowTypeError("init callback is not assigned to a function");
env->async_hooks()->set_enable_callbacks(1);
}
static void DisableHooksJS(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
env->async_hooks()->set_enable_callbacks(0);
}
static void SetupHooks(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
if (env->async_hooks()->callbacks_enabled())
return env->ThrowError("hooks should not be set while also enabled");
if (!args[0]->IsObject())
return env->ThrowTypeError("first argument must be an object");
Local<Object> fn_obj = args[0].As<Object>();
Local<Value> init_v = fn_obj->Get(
env->context(),
FIXED_ONE_BYTE_STRING(env->isolate(), "init")).ToLocalChecked();
Local<Value> pre_v = fn_obj->Get(
env->context(),
FIXED_ONE_BYTE_STRING(env->isolate(), "pre")).ToLocalChecked();
Local<Value> post_v = fn_obj->Get(
env->context(),
FIXED_ONE_BYTE_STRING(env->isolate(), "post")).ToLocalChecked();
Local<Value> destroy_v = fn_obj->Get(
env->context(),
FIXED_ONE_BYTE_STRING(env->isolate(), "destroy")).ToLocalChecked();
if (!init_v->IsFunction())
return env->ThrowTypeError("init callback must be a function");
env->set_async_hooks_init_function(init_v.As<Function>());
if (pre_v->IsFunction())
env->set_async_hooks_pre_function(pre_v.As<Function>());
if (post_v->IsFunction())
env->set_async_hooks_post_function(post_v.As<Function>());
if (destroy_v->IsFunction())
env->set_async_hooks_destroy_function(destroy_v.As<Function>());
}
static void Initialize(Local<Object> target,
Local<Value> unused,
Local<Context> context) {
Environment* env = Environment::GetCurrent(context);
Isolate* isolate = env->isolate();
HandleScope scope(isolate);
env->SetMethod(target, "setupHooks", SetupHooks);
env->SetMethod(target, "disable", DisableHooksJS);
env->SetMethod(target, "enable", EnableHooksJS);
Local<Object> async_providers = Object::New(isolate);
#define V(PROVIDER) \
async_providers->Set(FIXED_ONE_BYTE_STRING(isolate, #PROVIDER), \
Integer::New(isolate, AsyncWrap::PROVIDER_ ## PROVIDER));
NODE_ASYNC_PROVIDER_TYPES(V)
#undef V
target->Set(FIXED_ONE_BYTE_STRING(isolate, "Providers"), async_providers);
env->set_async_hooks_init_function(Local<Function>());
env->set_async_hooks_pre_function(Local<Function>());
env->set_async_hooks_post_function(Local<Function>());
env->set_async_hooks_destroy_function(Local<Function>());
}
void LoadAsyncWrapperInfo(Environment* env) {
HeapProfiler* heap_profiler = env->isolate()->GetHeapProfiler();
#define V(PROVIDER) \
heap_profiler->SetWrapperClassInfoProvider( \
(NODE_ASYNC_ID_OFFSET + AsyncWrap::PROVIDER_ ## PROVIDER), WrapperInfo);
NODE_ASYNC_PROVIDER_TYPES(V)
#undef V
}
Local<Value> AsyncWrap::MakeCallback(const Local<Function> cb,
int argc,
Local<Value>* argv) {
CHECK(env()->context() == env()->isolate()->GetCurrentContext());
Local<Function> pre_fn = env()->async_hooks_pre_function();
Local<Function> post_fn = env()->async_hooks_post_function();
Local<Value> uid = Number::New(env()->isolate(), get_uid());
Local<Object> context = object();
Local<Object> domain;
bool has_domain = false;
Environment::AsyncCallbackScope callback_scope(env());
if (env()->using_domains()) {
Local<Value> domain_v = context->Get(env()->domain_string());
has_domain = domain_v->IsObject();
if (has_domain) {
domain = domain_v.As<Object>();
if (domain->Get(env()->disposed_string())->IsTrue())
return Local<Value>();
}
}
if (has_domain) {
Local<Value> enter_v = domain->Get(env()->enter_string());
if (enter_v->IsFunction()) {
if (enter_v.As<Function>()->Call(domain, 0, nullptr).IsEmpty()) {
FatalError("node::AsyncWrap::MakeCallback",
"domain enter callback threw, please report this");
}
}
}
if (ran_init_callback() && !pre_fn.IsEmpty()) {
TryCatch try_catch(env()->isolate());
MaybeLocal<Value> ar = pre_fn->Call(env()->context(), context, 1, &uid);
if (ar.IsEmpty()) {
ClearFatalExceptionHandlers(env());
FatalException(env()->isolate(), try_catch);
return Local<Value>();
}
}
Local<Value> ret = cb->Call(context, argc, argv);
if (ran_init_callback() && !post_fn.IsEmpty()) {
Local<Value> did_throw = Boolean::New(env()->isolate(), ret.IsEmpty());
Local<Value> vals[] = { uid, did_throw };
TryCatch try_catch(env()->isolate());
MaybeLocal<Value> ar =
post_fn->Call(env()->context(), context, arraysize(vals), vals);
if (ar.IsEmpty()) {
ClearFatalExceptionHandlers(env());
FatalException(env()->isolate(), try_catch);
return Local<Value>();
}
}
if (ret.IsEmpty()) {
return ret;
}
if (has_domain) {
Local<Value> exit_v = domain->Get(env()->exit_string());
if (exit_v->IsFunction()) {
if (exit_v.As<Function>()->Call(domain, 0, nullptr).IsEmpty()) {
FatalError("node::AsyncWrap::MakeCallback",
"domain exit callback threw, please report this");
}
}
}
if (callback_scope.in_makecallback()) {
return ret;
}
Environment::TickInfo* tick_info = env()->tick_info();
if (tick_info->length() == 0) {
env()->isolate()->RunMicrotasks();
}
Local<Object> process = env()->process_object();
if (tick_info->length() == 0) {
tick_info->set_index(0);
return ret;
}
if (env()->tick_callback_function()->Call(process, 0, nullptr).IsEmpty()) {
return Local<Value>();
}
return ret;
}
} // namespace node
NODE_MODULE_CONTEXT_AWARE_BUILTIN(async_wrap, node::Initialize)