// Copyright Joyent, Inc. and other Node contributors.

//

// Permission is hereby granted, free of charge, to any person obtaining a

// copy of this software and associated documentation files (the

// "Software"), to deal in the Software without restriction, including

// without limitation the rights to use, copy, modify, merge, publish,

// distribute, sublicense, and/or sell copies of the Software, and to permit

// persons to whom the Software is furnished to do so, subject to the

// following conditions:

//

// The above copyright notice and this permission notice shall be included

// in all copies or substantial portions of the Software.

//

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN

// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,

// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR

// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE

// USE OR OTHER DEALINGS IN THE SOFTWARE.

#include "node.h"

// ========== local headers ==========

#include "debug_utils-inl.h"

#include "env-inl.h"

#include "histogram-inl.h"

#include "memory_tracker-inl.h"

#include "node_binding.h"

#include "node_errors.h"

#include "node_internals.h"

#include "node_main_instance.h"

#include "node_metadata.h"

#include "node_native_module_env.h"

#include "node_options-inl.h"

#include "node_perf.h"

#include "node_process-inl.h"

#include "node_report.h"

#include "node_revert.h"

#include "node_snapshot_builder.h"

#include "node_v8_platform-inl.h"

#include "node_version.h"

#if HAVE_OPENSSL

#include "node_crypto.h"

#endif

#if defined(NODE_HAVE_I18N_SUPPORT)

#include "node_i18n.h"

#endif

#if HAVE_INSPECTOR

#include "inspector_agent.h"

#include "inspector_io.h"

#endif

#if defined HAVE_DTRACE || defined HAVE_ETW

#include "node_dtrace.h"

#endif

#if NODE_USE_V8_PLATFORM

#include "libplatform/libplatform.h"

#endif // NODE_USE_V8_PLATFORM

#include "v8-profiler.h"

#if HAVE_INSPECTOR

#include "inspector/worker_inspector.h" // ParentInspectorHandle

#endif

#include "large_pages/node_large_page.h"

#if defined(__APPLE__) || defined(__linux__) || defined(_WIN32)

#define NODE_USE_V8_WASM_TRAP_HANDLER 1

#else

#define NODE_USE_V8_WASM_TRAP_HANDLER 0

#endif

#if NODE_USE_V8_WASM_TRAP_HANDLER

#if defined(_WIN32)

#include "v8-wasm-trap-handler-win.h"

#else

#include <atomic>

#include "v8-wasm-trap-handler-posix.h"

#endif

#endif // NODE_USE_V8_WASM_TRAP_HANDLER

// ========== global C headers ==========

#include <fcntl.h> // _O_RDWR

#include <sys/types.h>

#if defined(NODE_HAVE_I18N_SUPPORT)

#include <unicode/uvernum.h>

#include <unicode/utypes.h>

#endif

#if defined(LEAK_SANITIZER)

#include <sanitizer/lsan_interface.h>

#endif

#if defined(_MSC_VER)

#include <direct.h>

#include <io.h>

#define STDIN_FILENO 0

#else

#include <pthread.h>

#include <sys/resource.h> // getrlimit, setrlimit

#include <termios.h> // tcgetattr, tcsetattr

#include <unistd.h> // STDIN_FILENO, STDERR_FILENO

#endif

// ========== global C++ headers ==========

#include <cerrno>

#include <climits> // PATH_MAX

#include <csignal>

#include <cstdio>

#include <cstdlib>

#include <cstring>

#include <string>

#include <vector>

namespace node {

using native_module::NativeModuleEnv;

using v8::EscapableHandleScope;

using v8::Function;

using v8::FunctionCallbackInfo;

using v8::Isolate;

using v8::Local;

using v8::MaybeLocal;

using v8::Object;

using v8::String;

using v8::Undefined;

using v8::V8;

using v8::Value;

namespace per_process {

// node_revert.h

// Bit flag used to track security reverts.

unsigned int reverted_cve = 0;

// util.h

// Tells whether the per-process V8::Initialize() is called and

// if it is safe to call v8::Isolate::TryGetCurrent().

bool v8_initialized = false;

// node_internals.h

// process-relative uptime base in nanoseconds, initialized in node::Start()

uint64_t node_start_time;

#if NODE_USE_V8_WASM_TRAP_HANDLER && defined(_WIN32)

PVOID old_vectored_exception_handler;

#endif

// node_v8_platform-inl.h

struct V8Platform v8_platform;

} // namespace per_process

// The section in the OpenSSL configuration file to be loaded.

const char* conf_section_name = STRINGIFY(NODE_OPENSSL_CONF_NAME);

#ifdef __POSIX__

void SignalExit(int signo, siginfo_t* info, void* ucontext) {

ResetStdio();

raise(signo);

}

#endif // __POSIX__

MaybeLocal<Value> ExecuteBootstrapper(Environment* env,

const char* id,

std::vector<Local<String>>* parameters,

std::vector<Local<Value>>* arguments) {

EscapableHandleScope scope(env->isolate());

MaybeLocal<Function> maybe_fn =

NativeModuleEnv::LookupAndCompile(env->context(), id, parameters, env);

Local<Function> fn;

if (!maybe_fn.ToLocal(&fn)) {

return MaybeLocal<Value>();

}

MaybeLocal<Value> result = fn->Call(env->context(),

Undefined(env->isolate()),

arguments->size(),

arguments->data());

// If there was an error during bootstrap, it must be unrecoverable

// (e.g. max call stack exceeded). Clear the stack so that the

// AsyncCallbackScope destructor doesn't fail on the id check.

// There are only two ways to have a stack size > 1: 1) the user manually

// called MakeCallback or 2) user awaited during bootstrap, which triggered

// _tickCallback().

if (result.IsEmpty()) {

env->async_hooks()->clear_async_id_stack();

}

return scope.EscapeMaybe(result);

}

#if HAVE_INSPECTOR

int Environment::InitializeInspector(

std::unique_ptr<inspector::ParentInspectorHandle> parent_handle) {

std::string inspector_path;

bool is_main = !parent_handle;

if (parent_handle) {

inspector_path = parent_handle->url();

inspector_agent_->SetParentHandle(std::move(parent_handle));

} else {

inspector_path = argv_.size() > 1 ? argv_[1].c_str() : "";

}

CHECK(!inspector_agent_->IsListening());

// Inspector agent can't fail to start, but if it was configured to listen

// right away on the websocket port and fails to bind/etc, this will return

// false.

inspector_agent_->Start(inspector_path,

options_->debug_options(),

inspector_host_port(),

is_main);

if (options_->debug_options().inspector_enabled &&

!inspector_agent_->IsListening()) {

return 12; // Signal internal error

}

profiler::StartProfilers(this);

if (inspector_agent_->options().break_node_first_line) {

inspector_agent_->PauseOnNextJavascriptStatement("Break at bootstrap");

}

return 0;

}

#endif // HAVE_INSPECTOR

#define ATOMIC_WAIT_EVENTS(V) \

V(kStartWait, "started") \

V(kWokenUp, "was woken up by another thread") \

V(kTimedOut, "timed out") \

V(kTerminatedExecution, "was stopped by terminated execution") \

V(kAPIStopped, "was stopped through the embedder API") \

V(kNotEqual, "did not wait because the values mismatched") \

static void AtomicsWaitCallback(Isolate::AtomicsWaitEvent event,

Local<v8::SharedArrayBuffer> array_buffer,

size_t offset_in_bytes, int64_t value,

double timeout_in_ms,

Isolate::AtomicsWaitWakeHandle* stop_handle,

void* data) {

Environment* env = static_cast<Environment*>(data);

const char* message = "(unknown event)";

switch (event) {

#define V(key, msg) \

case Isolate::AtomicsWaitEvent::key: \

message = msg; \

break;

ATOMIC_WAIT_EVENTS(V)

#undef V

}

fprintf(stderr,

"(node:%d) [Thread %" PRIu64 "] Atomics.wait(%p + %zx, %" PRId64

", %.f) %s\n",

static_cast<int>(uv_os_getpid()),

env->thread_id(),

array_buffer->GetBackingStore()->Data(),

offset_in_bytes,

value,

timeout_in_ms,

message);

}

void Environment::InitializeDiagnostics() {

isolate_->GetHeapProfiler()->AddBuildEmbedderGraphCallback(

Environment::BuildEmbedderGraph, this);

if (options_->heap_snapshot_near_heap_limit > 0) {

isolate_->AddNearHeapLimitCallback(Environment::NearHeapLimitCallback,

this);

}

if (options_->trace_uncaught)

isolate_->SetCaptureStackTraceForUncaughtExceptions(true);

if (options_->trace_atomics_wait) {

isolate_->SetAtomicsWaitCallback(AtomicsWaitCallback, this);

AddCleanupHook([](void* data) {

Environment* env = static_cast<Environment*>(data);

env->isolate()->SetAtomicsWaitCallback(nullptr, nullptr);

}, this);

}

#if defined HAVE_DTRACE || defined HAVE_ETW

InitDTrace(this);

#endif

}

MaybeLocal<Value> Environment::BootstrapInternalLoaders() {

EscapableHandleScope scope(isolate_);

// Create binding loaders

std::vector<Local<String>> loaders_params = {

process_string(),

FIXED_ONE_BYTE_STRING(isolate_, "getLinkedBinding"),

FIXED_ONE_BYTE_STRING(isolate_, "getInternalBinding"),

primordials_string()};

std::vector<Local<Value>> loaders_args = {

process_object(),

NewFunctionTemplate(binding::GetLinkedBinding)

->GetFunction(context())

.ToLocalChecked(),

NewFunctionTemplate(binding::GetInternalBinding)

->GetFunction(context())

.ToLocalChecked(),

primordials()};

// Bootstrap internal loaders

Local<Value> loader_exports;

if (!ExecuteBootstrapper(

this, "internal/bootstrap/loaders", &loaders_params, &loaders_args)

.ToLocal(&loader_exports)) {

return MaybeLocal<Value>();

}

CHECK(loader_exports->IsObject());

Local<Object> loader_exports_obj = loader_exports.As<Object>();

Local<Value> internal_binding_loader =

loader_exports_obj->Get(context(), internal_binding_string())

.ToLocalChecked();

CHECK(internal_binding_loader->IsFunction());

set_internal_binding_loader(internal_binding_loader.As<Function>());

Local<Value> require =

loader_exports_obj->Get(context(), require_string()).ToLocalChecked();

CHECK(require->IsFunction());

set_native_module_require(require.As<Function>());

return scope.Escape(loader_exports);

}

MaybeLocal<Value> Environment::BootstrapNode() {

EscapableHandleScope scope(isolate_);

Local<Object> global = context()->Global();

// TODO(joyeecheung): this can be done in JS land now.

global->Set(context(), FIXED_ONE_BYTE_STRING(isolate_, "global"), global)

.Check();

// process, require, internalBinding, primordials

std::vector<Local<String>> node_params = {

process_string(),

require_string(),

internal_binding_string(),

primordials_string()};

std::vector<Local<Value>> node_args = {

process_object(),

native_module_require(),

internal_binding_loader(),

primordials()};

MaybeLocal<Value> result = ExecuteBootstrapper(

this, "internal/bootstrap/node", &node_params, &node_args);

if (result.IsEmpty()) {

return MaybeLocal<Value>();

}

if (!no_browser_globals()) {

result = ExecuteBootstrapper(

this, "internal/bootstrap/browser", &node_params, &node_args);

if (result.IsEmpty()) {

return MaybeLocal<Value>();

}

}

// TODO(joyeecheung): skip these in the snapshot building for workers.

auto thread_switch_id =

is_main_thread() ? "internal/bootstrap/switches/is_main_thread"

: "internal/bootstrap/switches/is_not_main_thread";

result =

ExecuteBootstrapper(this, thread_switch_id, &node_params, &node_args);

if (result.IsEmpty()) {

return MaybeLocal<Value>();

}

auto process_state_switch_id =

owns_process_state()

? "internal/bootstrap/switches/does_own_process_state"

: "internal/bootstrap/switches/does_not_own_process_state";

result = ExecuteBootstrapper(

this, process_state_switch_id, &node_params, &node_args);

if (result.IsEmpty()) {

return MaybeLocal<Value>();

}

Local<String> env_string = FIXED_ONE_BYTE_STRING(isolate_, "env");

Local<Object> env_var_proxy;

if (!CreateEnvVarProxy(context(), isolate_).ToLocal(&env_var_proxy) ||

process_object()->Set(context(), env_string, env_var_proxy).IsNothing()) {

return MaybeLocal<Value>();

}

return scope.EscapeMaybe(result);

}

MaybeLocal<Value> Environment::RunBootstrapping() {

EscapableHandleScope scope(isolate_);

CHECK(!has_run_bootstrapping_code());

if (BootstrapInternalLoaders().IsEmpty()) {

return MaybeLocal<Value>();

}

Local<Value> result;

if (!BootstrapNode().ToLocal(&result)) {

return MaybeLocal<Value>();

}

// Make sure that no request or handle is created during bootstrap -

// if necessary those should be done in pre-execution.

// Usually, doing so would trigger the checks present in the ReqWrap and

// HandleWrap classes, so this is only a consistency check.

CHECK(req_wrap_queue()->IsEmpty());

CHECK(handle_wrap_queue()->IsEmpty());

DoneBootstrapping();

return scope.Escape(result);

}

void MarkBootstrapComplete(const FunctionCallbackInfo<Value>& args) {

Environment* env = Environment::GetCurrent(args);

env->performance_state()->Mark(

performance::NODE_PERFORMANCE_MILESTONE_BOOTSTRAP_COMPLETE);

}

static

MaybeLocal<Value> StartExecution(Environment* env, const char* main_script_id) {

EscapableHandleScope scope(env->isolate());

CHECK_NOT_NULL(main_script_id);

std::vector<Local<String>> parameters = {

env->process_string(),

env->require_string(),

env->internal_binding_string(),

env->primordials_string(),

FIXED_ONE_BYTE_STRING(env->isolate(), "markBootstrapComplete")};

std::vector<Local<Value>> arguments = {

env->process_object(),

env->native_module_require(),

env->internal_binding_loader(),

env->primordials(),

env->NewFunctionTemplate(MarkBootstrapComplete)

->GetFunction(env->context())

.ToLocalChecked()};

return scope.EscapeMaybe(

ExecuteBootstrapper(env, main_script_id, &parameters, &arguments));

}

MaybeLocal<Value> StartExecution(Environment* env, StartExecutionCallback cb) {

InternalCallbackScope callback_scope(

env,

Object::New(env->isolate()),

{ 1, 0 },

InternalCallbackScope::kSkipAsyncHooks);

if (cb != nullptr) {

EscapableHandleScope scope(env->isolate());

if (StartExecution(env, "internal/bootstrap/environment").IsEmpty())

return {};

StartExecutionCallbackInfo info = {

env->process_object(),

env->native_module_require(),

};

return scope.EscapeMaybe(cb(info));

}

if (env->worker_context() != nullptr) {

return StartExecution(env, "internal/main/worker_thread");

}

std::string first_argv;

if (env->argv().size() > 1) {

first_argv = env->argv()[1];

}

if (first_argv == "inspect") {

return StartExecution(env, "internal/main/inspect");

}

if (per_process::cli_options->build_snapshot) {

return StartExecution(env, "internal/main/mksnapshot");

}

if (per_process::cli_options->print_help) {

return StartExecution(env, "internal/main/print_help");

}

if (env->options()->prof_process) {

return StartExecution(env, "internal/main/prof_process");

}

// -e/--eval without -i/--interactive

if (env->options()->has_eval_string && !env->options()->force_repl) {

return StartExecution(env, "internal/main/eval_string");

}

if (env->options()->syntax_check_only) {

return StartExecution(env, "internal/main/check_syntax");

}

if (env->options()->test_runner) {

return StartExecution(env, "internal/main/test_runner");

}

if (!first_argv.empty() && first_argv != "-") {

return StartExecution(env, "internal/main/run_main_module");

}

if (env->options()->force_repl || uv_guess_handle(STDIN_FILENO) == UV_TTY) {

return StartExecution(env, "internal/main/repl");

}

return StartExecution(env, "internal/main/eval_stdin");

}

#ifdef __POSIX__

typedef void (*sigaction_cb)(int signo, siginfo_t* info, void* ucontext);

#endif

#if NODE_USE_V8_WASM_TRAP_HANDLER

#if defined(_WIN32)

static LONG TrapWebAssemblyOrContinue(EXCEPTION_POINTERS* exception) {

if (v8::TryHandleWebAssemblyTrapWindows(exception)) {

return EXCEPTION_CONTINUE_EXECUTION;

}

return EXCEPTION_CONTINUE_SEARCH;

}

#else

static std::atomic<sigaction_cb> previous_sigsegv_action;

void TrapWebAssemblyOrContinue(int signo, siginfo_t* info, void* ucontext) {

if (!v8::TryHandleWebAssemblyTrapPosix(signo, info, ucontext)) {

sigaction_cb prev = previous_sigsegv_action.load();

if (prev != nullptr) {

prev(signo, info, ucontext);

} else {

// Reset to the default signal handler, i.e. cause a hard crash.

struct sigaction sa;

memset(&sa, 0, sizeof(sa));

sa.sa_handler = SIG_DFL;

CHECK_EQ(sigaction(signo, &sa, nullptr), 0);

ResetStdio();

raise(signo);

}

}

}

#endif // defined(_WIN32)

#endif // NODE_USE_V8_WASM_TRAP_HANDLER

#ifdef __POSIX__

void RegisterSignalHandler(int signal,

sigaction_cb handler,

bool reset_handler) {

CHECK_NOT_NULL(handler);

#if NODE_USE_V8_WASM_TRAP_HANDLER

if (signal == SIGSEGV) {

CHECK(previous_sigsegv_action.is_lock_free());

CHECK(!reset_handler);

previous_sigsegv_action.store(handler);

return;

}

#endif // NODE_USE_V8_WASM_TRAP_HANDLER

struct sigaction sa;

memset(&sa, 0, sizeof(sa));

sa.sa_sigaction = handler;

sa.sa_flags = reset_handler ? SA_RESETHAND : 0;

sigfillset(&sa.sa_mask);

CHECK_EQ(sigaction(signal, &sa, nullptr), 0);

}

#endif // __POSIX__

#ifdef __POSIX__

static struct {

int flags;

bool isatty;

struct stat stat;

struct termios termios;

} stdio[1 + STDERR_FILENO];

#endif // __POSIX__

inline void PlatformInit() {

#ifdef __POSIX__

#if HAVE_INSPECTOR

sigset_t sigmask;

sigemptyset(&sigmask);

sigaddset(&sigmask, SIGUSR1);

const int err = pthread_sigmask(SIG_SETMASK, &sigmask, nullptr);

#endif // HAVE_INSPECTOR

// Make sure file descriptors 0-2 are valid before we start logging anything.

for (auto& s : stdio) {

const int fd = &s - stdio;

if (fstat(fd, &s.stat) == 0)

continue;

// Anything but EBADF means something is seriously wrong. We don't

// have to special-case EINTR, fstat() is not interruptible.

if (errno != EBADF)

ABORT();

if (fd != open("/dev/null", O_RDWR))

ABORT();

if (fstat(fd, &s.stat) != 0)

ABORT();

}

#if HAVE_INSPECTOR

CHECK_EQ(err, 0);

#endif // HAVE_INSPECTOR

// TODO(addaleax): NODE_SHARED_MODE does not really make sense here.

#ifndef NODE_SHARED_MODE

// Restore signal dispositions, the parent process may have changed them.

struct sigaction act;

memset(&act, 0, sizeof(act));

// The hard-coded upper limit is because NSIG is not very reliable; on Linux,

// it evaluates to 32, 34 or 64, depending on whether RT signals are enabled.

// Counting up to SIGRTMIN doesn't work for the same reason.

for (unsigned nr = 1; nr < kMaxSignal; nr += 1) {

if (nr == SIGKILL || nr == SIGSTOP)

continue;

act.sa_handler = (nr == SIGPIPE || nr == SIGXFSZ) ? SIG_IGN : SIG_DFL;

CHECK_EQ(0, sigaction(nr, &act, nullptr));

}

#endif // !NODE_SHARED_MODE

// Record the state of the stdio file descriptors so we can restore it

// on exit. Needs to happen before installing signal handlers because

// they make use of that information.

for (auto& s : stdio) {

const int fd = &s - stdio;

int err;

do

s.flags = fcntl(fd, F_GETFL);

while (s.flags == -1 && errno == EINTR); // NOLINT

CHECK_NE(s.flags, -1);

if (uv_guess_handle(fd) != UV_TTY) continue;

s.isatty = true;

do

err = tcgetattr(fd, &s.termios);

while (err == -1 && errno == EINTR); // NOLINT

CHECK_EQ(err, 0);

}

RegisterSignalHandler(SIGINT, SignalExit, true);

RegisterSignalHandler(SIGTERM, SignalExit, true);

#if NODE_USE_V8_WASM_TRAP_HANDLER

#if defined(_WIN32)

{

constexpr ULONG first = TRUE;

per_process::old_vectored_exception_handler =

AddVectoredExceptionHandler(first, TrapWebAssemblyOrContinue);

}

#else

// Tell V8 to disable emitting WebAssembly

// memory bounds checks. This means that we have

// to catch the SIGSEGV in TrapWebAssemblyOrContinue

// and pass the signal context to V8.

{

struct sigaction sa;

memset(&sa, 0, sizeof(sa));

sa.sa_sigaction = TrapWebAssemblyOrContinue;

sa.sa_flags = SA_SIGINFO;

CHECK_EQ(sigaction(SIGSEGV, &sa, nullptr), 0);

}

#endif // defined(_WIN32)

V8::EnableWebAssemblyTrapHandler(false);

#endif // NODE_USE_V8_WASM_TRAP_HANDLER

// Raise the open file descriptor limit.

struct rlimit lim;

if (getrlimit(RLIMIT_NOFILE, &lim) == 0 && lim.rlim_cur != lim.rlim_max) {

// Do a binary search for the limit.

rlim_t min = lim.rlim_cur;

rlim_t max = 1 << 20;

// But if there's a defined upper bound, don't search, just set it.

if (lim.rlim_max != RLIM_INFINITY) {

min = lim.rlim_max;

max = lim.rlim_max;

}

do {

lim.rlim_cur = min + (max - min) / 2;

if (setrlimit(RLIMIT_NOFILE, &lim)) {

max = lim.rlim_cur;

} else {

min = lim.rlim_cur;

}

} while (min + 1 < max);

}

#endif // __POSIX__

#ifdef _WIN32

for (int fd = 0; fd <= 2; ++fd) {

auto handle = reinterpret_cast<HANDLE>(_get_osfhandle(fd));

if (handle == INVALID_HANDLE_VALUE ||

GetFileType(handle) == FILE_TYPE_UNKNOWN) {

// Ignore _close result. If it fails or not depends on used Windows

// version. We will just check _open result.

_close(fd);

if (fd != _open("nul", _O_RDWR))

ABORT();

}

}

#endif // _WIN32

}

// Safe to call more than once and from signal handlers.

void ResetStdio() {

uv_tty_reset_mode();

#ifdef __POSIX__

for (auto& s : stdio) {

const int fd = &s - stdio;

struct stat tmp;

if (-1 == fstat(fd, &tmp)) {

CHECK_EQ(errno, EBADF); // Program closed file descriptor.

continue;

}

bool is_same_file =

(s.stat.st_dev == tmp.st_dev && s.stat.st_ino == tmp.st_ino);

if (!is_same_file) continue; // Program reopened file descriptor.

int flags;

do

flags = fcntl(fd, F_GETFL);

while (flags == -1 && errno == EINTR); // NOLINT

CHECK_NE(flags, -1);

// Restore the O_NONBLOCK flag if it changed.

if (O_NONBLOCK & (flags ^ s.flags)) {

flags &= ~O_NONBLOCK;

flags |= s.flags & O_NONBLOCK;

int err;

do

err = fcntl(fd, F_SETFL, flags);

while (err == -1 && errno == EINTR); // NOLINT

CHECK_NE(err, -1);

}

if (s.isatty) {

sigset_t sa;

int err;

// We might be a background job that doesn't own the TTY so block SIGTTOU

// before making the tcsetattr() call, otherwise that signal suspends us.

sigemptyset(&sa);

sigaddset(&sa, SIGTTOU);

CHECK_EQ(0, pthread_sigmask(SIG_BLOCK, &sa, nullptr));

do

err = tcsetattr(fd, TCSANOW, &s.termios);

while (err == -1 && errno == EINTR); // NOLINT

CHECK_EQ(0, pthread_sigmask(SIG_UNBLOCK, &sa, nullptr));

// Normally we expect err == 0. But if macOS App Sandbox is enabled,

// tcsetattr will fail with err == -1 and errno == EPERM.

CHECK_IMPLIES(err != 0, err == -1 && errno == EPERM);

}

}

#endif // __POSIX__

}

int ProcessGlobalArgs(std::vector<std::string>* args,

std::vector<std::string>* exec_args,

std::vector<std::string>* errors,

OptionEnvvarSettings settings) {

// Parse a few arguments which are specific to Node.

std::vector<std::string> v8_args;

Mutex::ScopedLock lock(per_process::cli_options_mutex);

options_parser::Parse(

args,

exec_args,

&v8_args,

per_process::cli_options.get(),

settings,

errors);

if (!errors->empty()) return 9;

std::string revert_error;

for (const std::string& cve : per_process::cli_options->security_reverts) {

Revert(cve.c_str(), &revert_error);

if (!revert_error.empty()) {

errors->emplace_back(std::move(revert_error));

return 12;

}

}

if (per_process::cli_options->disable_proto != "delete" &&

per_process::cli_options->disable_proto != "throw" &&

per_process::cli_options->disable_proto != "") {

errors->emplace_back("invalid mode passed to --disable-proto");

return 12;

}

// TODO(aduh95): remove this when the harmony-import-assertions flag

// is removed in V8.

if (std::find(v8_args.begin(), v8_args.end(),

"--no-harmony-import-assertions") == v8_args.end()) {

v8_args.emplace_back("--harmony-import-assertions");

}

auto env_opts = per_process::cli_options->per_isolate->per_env;

if (std::find(v8_args.begin(), v8_args.end(),

"--abort-on-uncaught-exception") != v8_args.end() ||

std::find(v8_args.begin(), v8_args.end(),

"--abort_on_uncaught_exception") != v8_args.end()) {

env_opts->abort_on_uncaught_exception = true;

}

#ifdef __POSIX__

// Block SIGPROF signals when sleeping in epoll_wait/kevent/etc. Avoids the

// performance penalty of frequent EINTR wakeups when the profiler is running.

// Only do this for v8.log profiling, as it breaks v8::CpuProfiler users.

if (std::find(v8_args.begin(), v8_args.end(), "--prof") != v8_args.end()) {

uv_loop_configure(uv_default_loop(), UV_LOOP_BLOCK_SIGNAL, SIGPROF);

}

#endif

std::vector<char*> v8_args_as_char_ptr(v8_args.size());

if (v8_args.size() > 0) {

for (size_t i = 0; i < v8_args.size(); ++i)

v8_args_as_char_ptr[i] = &v8_args[i][0];

int argc = v8_args.size();

V8::SetFlagsFromCommandLine(&argc, &v8_args_as_char_ptr[0], true);

v8_args_as_char_ptr.resize(argc);

}

// Anything that's still in v8_argv is not a V8 or a node option.

for (size_t i = 1; i < v8_args_as_char_ptr.size(); i++)

errors->push_back("bad option: " + std::string(v8_args_as_char_ptr[i]));

if (v8_args_as_char_ptr.size() > 1) return 9;

return 0;

}

static std::atomic_bool init_called{false};

int InitializeNodeWithArgs(std::vector<std::string>* argv,

std::vector<std::string>* exec_argv,

std::vector<std::string>* errors) {

return InitializeNodeWithArgs(argv, exec_argv, errors,

ProcessFlags::kNoFlags);

}

int InitializeNodeWithArgs(std::vector<std::string>* argv,

std::vector<std::string>* exec_argv,

std::vector<std::string>* errors,

ProcessFlags::Flags flags) {

// Make sure InitializeNodeWithArgs() is called only once.

CHECK(!init_called.exchange(true));

// Initialize node_start_time to get relative uptime.

per_process::node_start_time = uv_hrtime();

// Register built-in modules

binding::RegisterBuiltinModules();

// Make inherited handles noninheritable.

if (!(flags & ProcessFlags::kEnableStdioInheritance))

uv_disable_stdio_inheritance();

// Cache the original command line to be

// used in diagnostic reports.

per_process::cli_options->cmdline = *argv;

#if defined(NODE_V8_OPTIONS)

// Should come before the call to V8::SetFlagsFromCommandLine()

// so the user can disable a flag --foo at run-time by passing

// --no_foo from the command line.

V8::SetFlagsFromString(NODE_V8_OPTIONS, sizeof(NODE_V8_OPTIONS) - 1);

#endif

HandleEnvOptions(per_process::cli_options->per_isolate->per_env);

#if !defined(NODE_WITHOUT_NODE_OPTIONS)

if (!(flags & ProcessFlags::kDisableNodeOptionsEnv)) {

std::string node_options;

if (credentials::SafeGetenv("NODE_OPTIONS", &node_options)) {

std::vector<std::string> env_argv =

ParseNodeOptionsEnvVar(node_options, errors);

if (!errors->empty()) return 9;

// [0] is expected to be the program name, fill it in from the real argv.

env_argv.insert(env_argv.begin(), argv->at(0));

const int exit_code = ProcessGlobalArgs(&env_argv,

nullptr,

errors,

kAllowedInEnvironment);

if (exit_code != 0) return exit_code;

}

}

#endif

if (!(flags & ProcessFlags::kDisableCLIOptions)) {

const int exit_code = ProcessGlobalArgs(argv,

exec_argv,

errors,

kDisallowedInEnvironment);

if (exit_code != 0) return exit_code;

}

// Set the process.title immediately after processing argv if --title is set.

if (!per_process::cli_options->title.empty())

uv_set_process_title(per_process::cli_options->title.c_str());

#if defined(NODE_HAVE_I18N_SUPPORT)

if (!(flags & ProcessFlags::kNoICU)) {

// If the parameter isn't given, use the env variable.

if (per_process::cli_options->icu_data_dir.empty())

credentials::SafeGetenv("NODE_ICU_DATA",

&per_process::cli_options->icu_data_dir);

#ifdef NODE_ICU_DEFAULT_DATA_DIR

// If neither the CLI option nor the environment variable was specified,

// fall back to the configured default

if (per_process::cli_options->icu_data_dir.empty()) {

// Check whether the NODE_ICU_DEFAULT_DATA_DIR contains the right data

// file and can be read.

static const char full_path[] =

NODE_ICU_DEFAULT_DATA_DIR "/" U_ICUDATA_NAME ".dat";

FILE* f = fopen(full_path, "rb");

if (f != nullptr) {

fclose(f);

per_process::cli_options->icu_data_dir = NODE_ICU_DEFAULT_DATA_DIR;

}

}

#endif // NODE_ICU_DEFAULT_DATA_DIR

// Initialize ICU.

// If icu_data_dir is empty here, it will load the 'minimal' data.

if (!i18n::InitializeICUDirectory(per_process::cli_options->icu_data_dir)) {

errors->push_back("could not initialize ICU "

"(check NODE_ICU_DATA or --icu-data-dir parameters)\n");

return 9;

}

per_process::metadata.versions.InitializeIntlVersions();

}

# ifndef __POSIX__

std::string tz;

if (credentials::SafeGetenv("TZ", &tz) && !tz.empty()) {

i18n::SetDefaultTimeZone(tz.c_str());

}

# endif

#endif // defined(NODE_HAVE_I18N_SUPPORT)

// We should set node_is_initialized here instead of in node::Start,

// otherwise embedders using node::Init to initialize everything will not be

// able to set it and native modules will not load for them.

node_is_initialized = true;

return 0;

}

InitializationResult InitializeOncePerProcess(int argc, char** argv) {

return InitializeOncePerProcess(argc, argv, kDefaultInitialization);

}

InitializationResult InitializeOncePerProcess(

int argc,

char** argv,

InitializationSettingsFlags flags,

ProcessFlags::Flags process_flags) {