blob: 84191b98154050db90066f5ac7874adbf66f2c4f [file] [log] [blame]
// Copyright 2018 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/d8/async-hooks-wrapper.h"
#include "src/d8/d8.h"
#include "src/execution/isolate-inl.h"
namespace v8 {
void AsyncHooksWrap::Enable() { enabled_ = true; }
void AsyncHooksWrap::Disable() { enabled_ = false; }
v8::Local<v8::Function> AsyncHooksWrap::init_function() const {
return init_function_.Get(isolate_);
}
void AsyncHooksWrap::set_init_function(v8::Local<v8::Function> value) {
init_function_.Reset(isolate_, value);
}
v8::Local<v8::Function> AsyncHooksWrap::before_function() const {
return before_function_.Get(isolate_);
}
void AsyncHooksWrap::set_before_function(v8::Local<v8::Function> value) {
before_function_.Reset(isolate_, value);
}
v8::Local<v8::Function> AsyncHooksWrap::after_function() const {
return after_function_.Get(isolate_);
}
void AsyncHooksWrap::set_after_function(v8::Local<v8::Function> value) {
after_function_.Reset(isolate_, value);
}
v8::Local<v8::Function> AsyncHooksWrap::promiseResolve_function() const {
return promiseResolve_function_.Get(isolate_);
}
void AsyncHooksWrap::set_promiseResolve_function(
v8::Local<v8::Function> value) {
promiseResolve_function_.Reset(isolate_, value);
}
static AsyncHooksWrap* UnwrapHook(
const v8::FunctionCallbackInfo<v8::Value>& args) {
Isolate* isolate = args.GetIsolate();
HandleScope scope(isolate);
Local<Object> hook = args.This();
AsyncHooks* hooks = PerIsolateData::Get(isolate)->GetAsyncHooks();
if (!hooks->async_hook_ctor.Get(isolate)->HasInstance(hook)) {
isolate->ThrowError("Invalid 'this' passed instead of AsyncHooks instance");
return nullptr;
}
Local<External> wrap = hook->GetInternalField(0).As<External>();
void* ptr = wrap->Value();
return static_cast<AsyncHooksWrap*>(ptr);
}
static void EnableHook(const v8::FunctionCallbackInfo<v8::Value>& args) {
AsyncHooksWrap* wrap = UnwrapHook(args);
if (wrap) {
wrap->Enable();
}
}
static void DisableHook(const v8::FunctionCallbackInfo<v8::Value>& args) {
AsyncHooksWrap* wrap = UnwrapHook(args);
if (wrap) {
wrap->Disable();
}
}
async_id_t AsyncHooks::GetExecutionAsyncId() const {
return asyncContexts.top().execution_async_id;
}
async_id_t AsyncHooks::GetTriggerAsyncId() const {
return asyncContexts.top().trigger_async_id;
}
Local<Object> AsyncHooks::CreateHook(
const v8::FunctionCallbackInfo<v8::Value>& args) {
Isolate* isolate = args.GetIsolate();
EscapableHandleScope handle_scope(isolate);
Local<Context> currentContext = isolate->GetCurrentContext();
if (args.Length() != 1 || !args[0]->IsObject()) {
isolate->ThrowError("Invalid arguments passed to createHook");
return Local<Object>();
}
AsyncHooksWrap* wrap = new AsyncHooksWrap(isolate);
Local<Object> fn_obj = args[0].As<Object>();
#define SET_HOOK_FN(name) \
Local<Value> name##_v = \
fn_obj->Get(currentContext, String::NewFromUtf8Literal(isolate, #name)) \
.ToLocalChecked(); \
if (name##_v->IsFunction()) { \
wrap->set_##name##_function(name##_v.As<Function>()); \
}
SET_HOOK_FN(init);
SET_HOOK_FN(before);
SET_HOOK_FN(after);
SET_HOOK_FN(promiseResolve);
#undef SET_HOOK_FN
async_wraps_.push_back(wrap);
Local<Object> obj = async_hooks_templ.Get(isolate)
->NewInstance(currentContext)
.ToLocalChecked();
obj->SetInternalField(0, External::New(isolate, wrap));
return handle_scope.Escape(obj);
}
void AsyncHooks::ShellPromiseHook(PromiseHookType type, Local<Promise> promise,
Local<Value> parent) {
AsyncHooks* hooks =
PerIsolateData::Get(promise->GetIsolate())->GetAsyncHooks();
HandleScope handle_scope(hooks->isolate_);
Local<Context> currentContext = hooks->isolate_->GetCurrentContext();
DCHECK(!currentContext.IsEmpty());
if (type == PromiseHookType::kInit) {
++hooks->current_async_id;
Local<Integer> async_id =
Integer::New(hooks->isolate_, hooks->current_async_id);
CHECK(!promise
->HasPrivate(currentContext,
hooks->async_id_smb.Get(hooks->isolate_))
.ToChecked());
promise->SetPrivate(currentContext,
hooks->async_id_smb.Get(hooks->isolate_), async_id);
if (parent->IsPromise()) {
Local<Promise> parent_promise = parent.As<Promise>();
Local<Value> parent_async_id =
parent_promise
->GetPrivate(hooks->isolate_->GetCurrentContext(),
hooks->async_id_smb.Get(hooks->isolate_))
.ToLocalChecked();
promise->SetPrivate(currentContext,
hooks->trigger_id_smb.Get(hooks->isolate_),
parent_async_id);
} else {
CHECK(parent->IsUndefined());
Local<Integer> trigger_id = Integer::New(hooks->isolate_, 0);
promise->SetPrivate(currentContext,
hooks->trigger_id_smb.Get(hooks->isolate_),
trigger_id);
}
} else if (type == PromiseHookType::kBefore) {
AsyncContext ctx;
ctx.execution_async_id =
promise
->GetPrivate(hooks->isolate_->GetCurrentContext(),
hooks->async_id_smb.Get(hooks->isolate_))
.ToLocalChecked()
.As<Integer>()
->Value();
ctx.trigger_async_id =
promise
->GetPrivate(hooks->isolate_->GetCurrentContext(),
hooks->trigger_id_smb.Get(hooks->isolate_))
.ToLocalChecked()
.As<Integer>()
->Value();
hooks->asyncContexts.push(ctx);
} else if (type == PromiseHookType::kAfter) {
hooks->asyncContexts.pop();
}
for (AsyncHooksWrap* wrap : hooks->async_wraps_) {
PromiseHookDispatch(type, promise, parent, wrap, hooks);
}
}
void AsyncHooks::Initialize() {
HandleScope handle_scope(isolate_);
async_hook_ctor.Reset(isolate_, FunctionTemplate::New(isolate_));
async_hook_ctor.Get(isolate_)->SetClassName(
String::NewFromUtf8Literal(isolate_, "AsyncHook"));
async_hooks_templ.Reset(isolate_,
async_hook_ctor.Get(isolate_)->InstanceTemplate());
async_hooks_templ.Get(isolate_)->SetInternalFieldCount(1);
async_hooks_templ.Get(isolate_)->Set(
isolate_, "enable", FunctionTemplate::New(isolate_, EnableHook));
async_hooks_templ.Get(isolate_)->Set(
isolate_, "disable", FunctionTemplate::New(isolate_, DisableHook));
async_id_smb.Reset(isolate_, Private::New(isolate_));
trigger_id_smb.Reset(isolate_, Private::New(isolate_));
isolate_->SetPromiseHook(ShellPromiseHook);
}
void AsyncHooks::Deinitialize() {
isolate_->SetPromiseHook(nullptr);
for (AsyncHooksWrap* wrap : async_wraps_) {
delete wrap;
}
}
void AsyncHooks::PromiseHookDispatch(PromiseHookType type,
Local<Promise> promise,
Local<Value> parent, AsyncHooksWrap* wrap,
AsyncHooks* hooks) {
if (!wrap->IsEnabled()) {
return;
}
HandleScope handle_scope(hooks->isolate_);
TryCatch try_catch(hooks->isolate_);
try_catch.SetVerbose(true);
i::Isolate* isolate = reinterpret_cast<i::Isolate*>(hooks->isolate_);
if (isolate->has_scheduled_exception()) {
isolate->ScheduleThrow(isolate->scheduled_exception());
DCHECK(try_catch.HasCaught());
Shell::ReportException(hooks->isolate_, &try_catch);
return;
}
Local<Value> rcv = Undefined(hooks->isolate_);
Local<Context> context = hooks->isolate_->GetCurrentContext();
Local<Value> async_id =
promise->GetPrivate(context, hooks->async_id_smb.Get(hooks->isolate_))
.ToLocalChecked();
Local<Value> args[1] = {async_id};
// This is unused. It's here to silence the warning about
// not using the MaybeLocal return value from Call.
MaybeLocal<Value> result;
// Sacrifice the brevity for readability and debugfulness
if (type == PromiseHookType::kInit) {
if (!wrap->init_function().IsEmpty()) {
Local<Value> initArgs[4] = {
async_id, String::NewFromUtf8Literal(hooks->isolate_, "PROMISE"),
promise
->GetPrivate(context, hooks->trigger_id_smb.Get(hooks->isolate_))
.ToLocalChecked(),
promise};
result = wrap->init_function()->Call(context, rcv, 4, initArgs);
}
} else if (type == PromiseHookType::kBefore) {
if (!wrap->before_function().IsEmpty()) {
result = wrap->before_function()->Call(context, rcv, 1, args);
}
} else if (type == PromiseHookType::kAfter) {
if (!wrap->after_function().IsEmpty()) {
result = wrap->after_function()->Call(context, rcv, 1, args);
}
} else if (type == PromiseHookType::kResolve) {
if (!wrap->promiseResolve_function().IsEmpty()) {
result = wrap->promiseResolve_function()->Call(context, rcv, 1, args);
}
}
}
} // namespace v8