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282 lines (230 loc) · 9.01 KB
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#ifndef SRC_NODE_INTERNALS_H_
#define SRC_NODE_INTERNALS_H_
#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
#include "node.h"
#include "util.h"
#include "util-inl.h"
#include "uv.h"
#include "v8.h"
#include <stdint.h>
#include <stdlib.h>
struct sockaddr;
// Variation on NODE_DEFINE_CONSTANT that sets a String value.
#define NODE_DEFINE_STRING_CONSTANT(target, name, constant) \
do { \
v8::Isolate* isolate = target->GetIsolate(); \
v8::Local<v8::String> constant_name = \
v8::String::NewFromUtf8(isolate, name); \
v8::Local<v8::String> constant_value = \
v8::String::NewFromUtf8(isolate, constant); \
v8::PropertyAttribute constant_attributes = \
static_cast<v8::PropertyAttribute>(v8::ReadOnly | v8::DontDelete); \
target->DefineOwnProperty(isolate->GetCurrentContext(), \
constant_name, \
constant_value, \
constant_attributes).FromJust(); \
} while (0)
namespace node {
// Set in node.cc by ParseArgs with the value of --openssl-config.
// Used in node_crypto.cc when initializing OpenSSL.
extern const char* openssl_config;
// Set in node.cc by ParseArgs when --preserve-symlinks is used.
// Used in node_config.cc to set a constant on process.binding('config')
// that is used by lib/module.js
extern bool config_preserve_symlinks;
// Tells whether it is safe to call v8::Isolate::GetCurrent().
extern bool v8_initialized;
// Forward declaration
class Environment;
// If persistent.IsWeak() == false, then do not call persistent.Reset()
// while the returned Local<T> is still in scope, it will destroy the
// reference to the object.
template <class TypeName>
inline v8::Local<TypeName> PersistentToLocal(
v8::Isolate* isolate,
const v8::Persistent<TypeName>& persistent);
// Call with valid HandleScope and while inside Context scope.
v8::Local<v8::Value> MakeCallback(Environment* env,
v8::Local<v8::Object> recv,
const char* method,
int argc = 0,
v8::Local<v8::Value>* argv = nullptr);
// Call with valid HandleScope and while inside Context scope.
v8::Local<v8::Value> MakeCallback(Environment* env,
v8::Local<v8::Object> recv,
v8::Local<v8::String> symbol,
int argc = 0,
v8::Local<v8::Value>* argv = nullptr);
// Call with valid HandleScope and while inside Context scope.
v8::Local<v8::Value> MakeCallback(Environment* env,
v8::Local<v8::Value> recv,
v8::Local<v8::Function> callback,
int argc = 0,
v8::Local<v8::Value>* argv = nullptr);
// Convert a struct sockaddr to a { address: '1.2.3.4', port: 1234 } JS object.
// Sets address and port properties on the info object and returns it.
// If |info| is omitted, a new object is returned.
v8::Local<v8::Object> AddressToJS(
Environment* env,
const sockaddr* addr,
v8::Local<v8::Object> info = v8::Local<v8::Object>());
template <typename T, int (*F)(const typename T::HandleType*, sockaddr*, int*)>
void GetSockOrPeerName(const v8::FunctionCallbackInfo<v8::Value>& args) {
T* const wrap = Unwrap<T>(args.Holder());
if (wrap == nullptr)
return args.GetReturnValue().Set(UV_EBADF);
CHECK(args[0]->IsObject());
sockaddr_storage storage;
int addrlen = sizeof(storage);
sockaddr* const addr = reinterpret_cast<sockaddr*>(&storage);
const int err = F(&wrap->handle_, addr, &addrlen);
if (err == 0)
AddressToJS(wrap->env(), addr, args[0].As<v8::Object>());
args.GetReturnValue().Set(err);
}
void SignalExit(int signo);
#ifdef __POSIX__
void RegisterSignalHandler(int signal,
void (*handler)(int signal),
bool reset_handler = false);
#endif
template <typename T, size_t N>
constexpr size_t arraysize(const T(&)[N]) { return N; }
#ifndef ROUND_UP
# define ROUND_UP(a, b) ((a) % (b) ? ((a) + (b)) - ((a) % (b)) : (a))
#endif
#ifdef __GNUC__
# define MUST_USE_RESULT __attribute__((warn_unused_result))
#else
# define MUST_USE_RESULT
#endif
bool IsExceptionDecorated(Environment* env, v8::Local<v8::Value> er);
enum ErrorHandlingMode { FATAL_ERROR, CONTEXTIFY_ERROR };
void AppendExceptionLine(Environment* env,
v8::Local<v8::Value> er,
v8::Local<v8::Message> message,
enum ErrorHandlingMode mode);
NO_RETURN void FatalError(const char* location, const char* message);
v8::Local<v8::Value> BuildStatsObject(Environment* env, const uv_stat_t* s);
void SetupProcessObject(Environment* env,
int argc,
const char* const* argv,
int exec_argc,
const char* const* exec_argv);
enum Endianness {
kLittleEndian, // _Not_ LITTLE_ENDIAN, clashes with endian.h.
kBigEndian
};
inline enum Endianness GetEndianness() {
// Constant-folded by the compiler.
const union {
uint8_t u8[2];
uint16_t u16;
} u = {
{ 1, 0 }
};
return u.u16 == 1 ? kLittleEndian : kBigEndian;
}
inline bool IsLittleEndian() {
return GetEndianness() == kLittleEndian;
}
inline bool IsBigEndian() {
return GetEndianness() == kBigEndian;
}
class ArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
public:
inline uint32_t* zero_fill_field() { return &zero_fill_field_; }
virtual void* Allocate(size_t size); // Defined in src/node.cc
virtual void* AllocateUninitialized(size_t size)
{ return node::UncheckedMalloc(size); }
virtual void Free(void* data, size_t) { free(data); }
private:
uint32_t zero_fill_field_ = 1; // Boolean but exposed as uint32 to JS land.
};
// Clear any domain and/or uncaughtException handlers to force the error's
// propagation and shutdown the process. Use this to force the process to exit
// by clearing all callbacks that could handle the error.
void ClearFatalExceptionHandlers(Environment* env);
enum NodeInstanceType { MAIN, WORKER, REMOTE_DEBUG_SERVER };
class NodeInstanceData {
public:
NodeInstanceData(NodeInstanceType node_instance_type,
uv_loop_t* event_loop,
int argc,
const char** argv,
int exec_argc,
const char** exec_argv,
bool use_debug_agent_flag)
: node_instance_type_(node_instance_type),
exit_code_(1),
event_loop_(event_loop),
argc_(argc),
argv_(argv),
exec_argc_(exec_argc),
exec_argv_(exec_argv),
use_debug_agent_flag_(use_debug_agent_flag) {
CHECK_NE(event_loop_, nullptr);
}
uv_loop_t* event_loop() const {
return event_loop_;
}
int exit_code() {
CHECK(is_main());
return exit_code_;
}
void set_exit_code(int exit_code) {
CHECK(is_main());
exit_code_ = exit_code;
}
bool is_main() {
return node_instance_type_ == MAIN;
}
bool is_worker() {
return node_instance_type_ == WORKER;
}
bool is_remote_debug_server() {
return node_instance_type_ == REMOTE_DEBUG_SERVER;
}
int argc() {
return argc_;
}
const char** argv() {
return argv_;
}
int exec_argc() {
return exec_argc_;
}
const char** exec_argv() {
return exec_argv_;
}
bool use_debug_agent() {
return is_main() && use_debug_agent_flag_;
}
private:
const NodeInstanceType node_instance_type_;
int exit_code_;
uv_loop_t* const event_loop_;
const int argc_;
const char** argv_;
const int exec_argc_;
const char** exec_argv_;
const bool use_debug_agent_flag_;
DISALLOW_COPY_AND_ASSIGN(NodeInstanceData);
};
namespace Buffer {
v8::MaybeLocal<v8::Object> Copy(Environment* env, const char* data, size_t len);
v8::MaybeLocal<v8::Object> New(Environment* env, size_t size);
// Takes ownership of |data|.
v8::MaybeLocal<v8::Object> New(Environment* env,
char* data,
size_t length,
void (*callback)(char* data, void* hint),
void* hint);
// Takes ownership of |data|. Must allocate |data| with malloc() or realloc()
// because ArrayBufferAllocator::Free() deallocates it again with free().
// Mixing operator new and free() is undefined behavior so don't do that.
v8::MaybeLocal<v8::Object> New(Environment* env, char* data, size_t length);
} // namespace Buffer
} // namespace node
#endif // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
#endif // SRC_NODE_INTERNALS_H_