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#ifndef SRC_NODE_NATIVE_MODULE_H_
#define SRC_NODE_NATIVE_MODULE_H_
#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
#include <map>
#include <set>
#include <string>
#include "env.h"
#include "node_union_bytes.h"
#include "v8.h"
namespace node {
namespace native_module {
using NativeModuleRecordMap = std::map<std::string, UnionBytes>;
using NativeModuleHashMap = std::map<std::string, std::string>;
// The native (C++) side of the NativeModule in JS land, which
// handles compilation and caching of builtin modules (NativeModule)
// and bootstrappers, whose source are bundled into the binary
// as static data.
// This class should not depend on a particular isolate, context, or
// environment. Rather it should take them as arguments when necessary.
// The instances of this class are per-process.
class NativeModuleLoader {
public:
// kCodeCache indicates that the compilation result should be returned
// as a Uint8Array, whereas kFunction indicates that the result should
// be returned as a Function.
// TODO(joyeecheung): it's possible to always produce code cache
// on the main thread and consume them in worker threads, or just
// share the cache among all the threads, although
// we need to decide whether to do that even when workers are not used.
enum class CompilationResultType { kCodeCache, kFunction };
NativeModuleLoader();
static void Initialize(v8::Local<v8::Object> target,
v8::Local<v8::Value> unused,
v8::Local<v8::Context> context,
void* priv);
v8::Local<v8::Object> GetSourceObject(v8::Local<v8::Context> context) const;
v8::Local<v8::String> GetSource(v8::Isolate* isolate, const char* id) const;
// Run a script with JS source bundled inside the binary as if it's wrapped
// in a function called with a null receiver and arguments specified in C++.
// The returned value is empty if an exception is encountered.
// JS code run with this method can assume that their top-level
// declarations won't affect the global scope.
v8::MaybeLocal<v8::Value> CompileAndCall(
v8::Local<v8::Context> context,
const char* id,
std::vector<v8::Local<v8::String>>* parameters,
std::vector<v8::Local<v8::Value>>* arguments,
Environment* optional_env);
private:
static void GetCacheUsage(const v8::FunctionCallbackInfo<v8::Value>& args);
// For legacy process.binding('natives') which is mutable, and for
// internalBinding('native_module').source for internal use
static void GetSourceObject(const v8::FunctionCallbackInfo<v8::Value>& args);
// Compile code cache for a specific native module
static void CompileCodeCache(const v8::FunctionCallbackInfo<v8::Value>& args);
// Compile a specific native module as a function
static void CompileFunction(const v8::FunctionCallbackInfo<v8::Value>& args);
// Generated by tools/js2c.py as node_javascript.cc
void LoadJavaScriptSource(); // Loads data into source_
void LoadJavaScriptHash(); // Loads data into source_hash_
// Generated by tools/generate_code_cache.js as node_code_cache.cc when
// the build is configured with --code-cache-path=.... They are noops
// in node_code_cache_stub.cc
void LoadCodeCache(); // Loads data into code_cache_
void LoadCodeCacheHash(); // Loads data into code_cache_hash_
v8::ScriptCompiler::CachedData* GetCachedData(const char* id) const;
// Compile a script as a NativeModule that can be loaded via
// NativeModule.p.require in JS land.
static v8::MaybeLocal<v8::Value> CompileAsModule(
Environment* env, const char* id, CompilationResultType result_type);
// For bootstrappers optional_env may be a nullptr.
// If an exception is encountered (e.g. source code contains
// syntax error), the returned value is empty.
v8::MaybeLocal<v8::Value> LookupAndCompile(
v8::Local<v8::Context> context,
const char* id,
std::vector<v8::Local<v8::String>>* parameters,
CompilationResultType result_type,
Environment* optional_env);
bool has_code_cache_ = false;
NativeModuleRecordMap source_;
NativeModuleRecordMap code_cache_;
NativeModuleHashMap source_hash_;
NativeModuleHashMap code_cache_hash_;
};
} // namespace native_module
} // namespace node
#endif // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
#endif // SRC_NODE_NATIVE_MODULE_H_
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