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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
#ifndef INTERNAL_H_
#define INTERNAL_H_
#include <map>
#include <string>
#include <utility>
#include <vector>
#include "buffer.h"
#include "deno.h"
#include "v8/include/v8.h"
#include "v8/src/base/logging.h"
namespace deno {
struct ModuleInfo {
bool main;
std::string name;
v8::Persistent<v8::Module> handle;
std::vector<std::string> import_specifiers;
ModuleInfo(v8::Isolate* isolate, v8::Local<v8::Module> module, bool main_,
const char* name_, std::vector<std::string> import_specifiers_)
: main(main_), name(name_), import_specifiers(import_specifiers_) {
handle.Reset(isolate, module);
}
};
// deno_s = Wrapped Isolate.
class DenoIsolate {
public:
explicit DenoIsolate(deno_config config)
: isolate_(nullptr),
locker_(nullptr),
shared_(config.shared),
current_args_(nullptr),
snapshot_creator_(nullptr),
global_import_buf_ptr_(nullptr),
recv_cb_(config.recv_cb),
user_data_(nullptr),
resolve_cb_(nullptr),
next_dyn_import_id_(0),
dyn_import_cb_(config.dyn_import_cb),
has_snapshotted_(false) {
if (config.load_snapshot.data_ptr) {
snapshot_.data =
reinterpret_cast<const char*>(config.load_snapshot.data_ptr);
snapshot_.raw_size = static_cast<int>(config.load_snapshot.data_len);
}
}
~DenoIsolate() {
last_exception_handle_.Reset();
shared_ab_.Reset();
if (locker_) {
delete locker_;
}
if (snapshot_creator_) {
// TODO(ry) V8 has a strange assert which prevents a SnapshotCreator from
// being deallocated if it hasn't created a snapshot yet.
// https://github.com/v8/v8/blob/73212783fbd534fac76cc4b66aac899c13f71fc8/src/api.cc#L603
// If that assert is removed, this if guard could be removed.
// WARNING: There may be false positive LSAN errors here.
if (has_snapshotted_) {
delete snapshot_creator_;
}
} else {
isolate_->Dispose();
}
}
static inline DenoIsolate* FromIsolate(v8::Isolate* isolate) {
return static_cast<DenoIsolate*>(isolate->GetData(0));
}
void AddIsolate(v8::Isolate* isolate);
deno_mod RegisterModule(bool main, const char* name, const char* source);
void ClearModules();
ModuleInfo* GetModuleInfo(deno_mod id) {
if (id == 0) {
return nullptr;
}
auto it = mods_.find(id);
if (it != mods_.end()) {
return &it->second;
} else {
return nullptr;
}
}
v8::Isolate* isolate_;
v8::Locker* locker_;
deno_buf shared_;
const v8::FunctionCallbackInfo<v8::Value>* current_args_;
v8::SnapshotCreator* snapshot_creator_;
void* global_import_buf_ptr_;
deno_recv_cb recv_cb_;
void* user_data_;
std::map<deno_mod, ModuleInfo> mods_;
std::map<std::string, deno_mod> mods_by_name_;
deno_resolve_cb resolve_cb_;
deno_dyn_import_id next_dyn_import_id_;
deno_dyn_import_cb dyn_import_cb_;
std::map<deno_dyn_import_id, v8::Persistent<v8::Promise::Resolver>>
dyn_import_map_;
v8::Persistent<v8::Context> context_;
std::map<int, v8::Persistent<v8::Value>> pending_promise_map_;
std::string last_exception_;
v8::Persistent<v8::Value> last_exception_handle_;
v8::Persistent<v8::Function> recv_;
v8::StartupData snapshot_;
v8::Persistent<v8::ArrayBuffer> global_import_buf_;
v8::Persistent<v8::SharedArrayBuffer> shared_ab_;
bool has_snapshotted_;
};
class UserDataScope {
DenoIsolate* deno_;
void* prev_data_;
void* data_; // Not necessary; only for sanity checking.
public:
UserDataScope(DenoIsolate* deno, void* data) : deno_(deno), data_(data) {
CHECK(deno->user_data_ == nullptr || deno->user_data_ == data_);
prev_data_ = deno->user_data_;
deno->user_data_ = data;
}
~UserDataScope() {
CHECK(deno_->user_data_ == data_);
deno_->user_data_ = prev_data_;
}
};
struct InternalFieldData {
uint32_t data;
};
static inline v8::Local<v8::String> v8_str(const char* x) {
return v8::String::NewFromUtf8(v8::Isolate::GetCurrent(), x,
v8::NewStringType::kNormal)
.ToLocalChecked();
}
static inline DenoIsolate* unwrap(Deno* d_) {
return reinterpret_cast<deno::DenoIsolate*>(d_);
}
const char* ToCString(const v8::String::Utf8Value& value);
void Print(const v8::FunctionCallbackInfo<v8::Value>& args);
void Recv(const v8::FunctionCallbackInfo<v8::Value>& args);
void Send(const v8::FunctionCallbackInfo<v8::Value>& args);
void EvalContext(const v8::FunctionCallbackInfo<v8::Value>& args);
void ErrorToJSON(const v8::FunctionCallbackInfo<v8::Value>& args);
void Shared(v8::Local<v8::Name> property,
const v8::PropertyCallbackInfo<v8::Value>& info);
void MessageCallback(v8::Local<v8::Message> message, v8::Local<v8::Value> data);
void QueueMicrotask(const v8::FunctionCallbackInfo<v8::Value>& args);
static intptr_t external_references[] = {
reinterpret_cast<intptr_t>(Print),
reinterpret_cast<intptr_t>(Recv),
reinterpret_cast<intptr_t>(Send),
reinterpret_cast<intptr_t>(EvalContext),
reinterpret_cast<intptr_t>(ErrorToJSON),
reinterpret_cast<intptr_t>(Shared),
reinterpret_cast<intptr_t>(MessageCallback),
reinterpret_cast<intptr_t>(QueueMicrotask),
0};
static const deno_buf empty_buf = {nullptr, 0};
static const deno_snapshot empty_snapshot = {nullptr, 0};
Deno* NewFromSnapshot(void* user_data, deno_recv_cb cb);
void InitializeContext(v8::Isolate* isolate, v8::Local<v8::Context> context);
void DeserializeInternalFields(v8::Local<v8::Object> holder, int index,
v8::StartupData payload, void* data);
v8::StartupData SerializeInternalFields(v8::Local<v8::Object> holder, int index,
void* data);
v8::Local<v8::Uint8Array> ImportBuf(DenoIsolate* d, deno_buf buf);
bool Execute(v8::Local<v8::Context> context, const char* js_filename,
const char* js_source);
bool ExecuteMod(v8::Local<v8::Context> context, const char* js_filename,
const char* js_source, bool resolve_only);
} // namespace deno
extern "C" {
// This is just to workaround the linker.
struct deno_s {
deno::DenoIsolate isolate;
};
}
#endif // INTERNAL_H_
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