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chromium/external/github.com/v8/node/refs/heads/main/./src/node.cc
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// 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_builtins.h"
#include "node_errors.h"
#include "node_internals.h"
#include "node_main_instance.h"
#include "node_metadata.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 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>
#ifndef __Fuchsia__
#include <sys/resource.h> // getrlimit, setrlimit
#endif
#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 builtins::BuiltinLoader;
using v8::EscapableHandleScope;
using v8::Function;
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<Value>>* arguments) {
EscapableHandleScope scope(env->isolate());
MaybeLocal<Function> maybe_fn =
BuiltinLoader::LookupAndCompile(env->context(), id, 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->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);
}
}
MaybeLocal<Value> Environment::BootstrapInternalLoaders() {
EscapableHandleScope scope(isolate_);
// Arguments must match the parameters specified in
// BuiltinLoader::LookupAndCompile().
std::vector<Local<Value>> loaders_args = {
process_object(),
NewFunctionTemplate(isolate_, binding::GetLinkedBinding)
->GetFunction(context())
.ToLocalChecked(),
NewFunctionTemplate(isolate_, binding::GetInternalBinding)
->GetFunction(context())
.ToLocalChecked(),
primordials()};
// Bootstrap internal loaders
Local<Value> loader_exports;
if (!ExecuteBootstrapper(this, "internal/bootstrap/loaders", &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_builtin_module_require(require.As<Function>());
return scope.Escape(loader_exports);
}
MaybeLocal<Value> Environment::BootstrapNode() {
EscapableHandleScope scope(isolate_);
// Arguments must match the parameters specified in
// BuiltinLoader::LookupAndCompile().
// process, require, internalBinding, primordials
std::vector<Local<Value>> node_args = {process_object(),
builtin_module_require(),
internal_binding_loader(),
primordials()};
MaybeLocal<Value> result =
ExecuteBootstrapper(this, "internal/bootstrap/node", &node_args);
if (result.IsEmpty()) {
return MaybeLocal<Value>();
}
if (!no_browser_globals()) {
result =
ExecuteBootstrapper(this, "internal/bootstrap/browser", &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_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_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);
}
static
MaybeLocal<Value> StartExecution(Environment* env, const char* main_script_id) {
EscapableHandleScope scope(env->isolate());
CHECK_NOT_NULL(main_script_id);
// Arguments must match the parameters specified in
// BuiltinLoader::LookupAndCompile().
std::vector<Local<Value>> arguments = {env->process_object(),
env->builtin_module_require(),
env->internal_binding_loader(),
env->primordials()};
return scope.EscapeMaybe(
ExecuteBootstrapper(env, main_script_id, &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/main/environment").IsEmpty()) return {};
StartExecutionCallbackInfo info = {
env->process_object(),
env->builtin_module_require(),
};
return scope.EscapeMaybe(cb(info));
}
// TODO(joyeecheung): move these conditions into JS land and let the
// deserialize main function take precedence. For workers, we need to
// move the pre-execution part into a different file that can be
// reused when dealing with user-defined main functions.
if (!env->snapshot_deserialize_main().IsEmpty()) {
return env->RunSnapshotDeserializeMain();
}
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
#if defined(__POSIX__) && !defined(__Fuchsia__)
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__
void ResetSignalHandlers() {
#ifdef __POSIX__
// 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 // __POSIX__
}
static std::atomic<uint64_t> init_process_flags = 0;
static void PlatformInit(ProcessInitializationFlags::Flags flags) {
// init_process_flags is accessed in ResetStdio(),
// which can be called from signal handlers.
CHECK(init_process_flags.is_lock_free());
init_process_flags.store(flags);
if (!(flags & ProcessInitializationFlags::kNoStdioInitialization)) {
atexit(ResetStdio);
}
#ifdef __POSIX__
if (!(flags & ProcessInitializationFlags::kNoStdioInitialization)) {
// Disable stdio buffering, it interacts poorly with printf()
// calls elsewhere in the program (e.g., any logging from V8.)
setvbuf(stdout, nullptr, _IONBF, 0);
setvbuf(stderr, nullptr, _IONBF, 0);
// 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 (!(flags & ProcessInitializationFlags::kNoDefaultSignalHandling)) {
#if HAVE_INSPECTOR
sigset_t sigmask;
sigemptyset(&sigmask);
sigaddset(&sigmask, SIGUSR1);
const int err = pthread_sigmask(SIG_SETMASK, &sigmask, nullptr);
CHECK_EQ(err, 0);
#endif // HAVE_INSPECTOR
ResetSignalHandlers();
}
if (!(flags & ProcessInitializationFlags::kNoStdioInitialization)) {
// 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);
}
}
if (!(flags & ProcessInitializationFlags::kNoDefaultSignalHandling)) {
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
}
if (!(flags & ProcessInitializationFlags::kNoAdjustResourceLimits)) {
// 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
if (!(flags & ProcessInitializationFlags::kNoStdioInitialization)) {
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() {
if (init_process_flags.load() &
ProcessInitializationFlags::kNoStdioInitialization) {
return;
}
uv_tty_reset_mode();
#ifdef __POSIX__
for (auto& s : stdio) {
const int fd = &s - stdio;
#ifdef __Fuchsia__
// In fuchsia stdin is not readily available.
if (fd == 0) continue;
#endif
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};
// TODO(addaleax): Turn this into a wrapper around InitializeOncePerProcess()
// (with the corresponding additional flags set), then eventually remove this.
int InitializeNodeWithArgs(std::vector<std::string>* argv,
std::vector<std::string>* exec_argv,
std::vector<std::string>* errors,
ProcessInitializationFlags::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 & ProcessInitializationFlags::kEnableStdioInheritance) &&
!(flags & ProcessInitializationFlags::kNoStdioInitialization)) {
uv_disable_stdio_inheritance();
}
// Cache the original command line to be
// used in diagnostic reports.
per_process::cli_options->cmdline = *argv;
// Node provides a "v8.setFlagsFromString" method to dynamically change flags.
// Hence do not freeze flags when initializing V8. In a browser setting, this
// is security relevant, for Node it's less important.
V8::SetFlagsFromString("--no-freeze-flags-after-init");
#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 & ProcessInitializationFlags::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 & ProcessInitializationFlags::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 & ProcessInitializationFlags::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 addons will not load for them.
node_is_initialized = true;
return 0;
}
std::unique_ptr<InitializationResult> InitializeOncePerProcess(
const std::vector<std::string>& args,
ProcessInitializationFlags::Flags flags) {
auto result = std::make_unique<InitializationResultImpl>();
result->args_ = args;
if (!(flags & ProcessInitializationFlags::kNoParseGlobalDebugVariables)) {
// Initialized the enabled list for Debug() calls with system
// environment variables.
per_process::enabled_debug_list.Parse();
}
PlatformInit(flags);
// This needs to run *before* V8::Initialize().
{
result->exit_code_ = InitializeNodeWithArgs(
&result->args_, &result->exec_args_, &result->errors_, flags);
if (result->exit_code() != 0) {
result->early_return_ = true;
return result;
}
}
if (!(flags & ProcessInitializationFlags::kNoUseLargePages) &&
(per_process::cli_options->use_largepages == "on" ||
per_process::cli_options->use_largepages == "silent")) {
int lp_result = node::MapStaticCodeToLargePages();
if (per_process::cli_options->use_largepages == "on" && lp_result != 0) {
result->errors_.emplace_back(node::LargePagesError(lp_result));
}
}
if (!(flags & ProcessInitializationFlags::kNoPrintHelpOrVersionOutput)) {
if (per_process::cli_options->print_version) {
printf("%s\n", NODE_VERSION);
result->exit_code_ = 0;
result->early_return_ = true;
return result;
}
if (per_process::cli_options->print_bash_completion) {
std::string completion = options_parser::GetBashCompletion();
printf("%s\n", completion.c_str());
result->exit_code_ = 0;
result->early_return_ = true;
return result;
}
if (per_process::cli_options->print_v8_help) {
V8::SetFlagsFromString("--help", static_cast<size_t>(6));
result->exit_code_ = 0;
result->early_return_ = true;
return result;
}
}
if (!(flags & ProcessInitializationFlags::kNoInitOpenSSL)) {
#if HAVE_OPENSSL && !defined(OPENSSL_IS_BORINGSSL)
auto GetOpenSSLErrorString = []() -> std::string {
std::string ret;
ERR_print_errors_cb(
[](const char* str, size_t len, void* opaque) {
std::string* ret = static_cast<std::string*>(opaque);
ret->append(str, len);
ret->append("\n");
return 0;
},
static_cast<void*>(&ret));
return ret;
};
{
std::string extra_ca_certs;
if (credentials::SafeGetenv("NODE_EXTRA_CA_CERTS", &extra_ca_certs))
crypto::UseExtraCaCerts(extra_ca_certs);
}
// In the case of FIPS builds we should make sure
// the random source is properly initialized first.
#if OPENSSL_VERSION_MAJOR >= 3
// Call OPENSSL_init_crypto to initialize OPENSSL_INIT_LOAD_CONFIG to
// avoid the default behavior where errors raised during the parsing of the
// OpenSSL configuration file are not propagated and cannot be detected.
//
// If FIPS is configured the OpenSSL configuration file will have an
// .include pointing to the fipsmodule.cnf file generated by the openssl
// fipsinstall command. If the path to this file is incorrect no error
// will be reported.
//
// For Node.js this will mean that EntropySource will be called by V8 as
// part of its initialization process, and EntropySource will in turn call
// CheckEntropy. CheckEntropy will call RAND_status which will now always
// return 0, leading to an endless loop and the node process will appear to
// hang/freeze.
// Passing NULL as the config file will allow the default openssl.cnf file
// to be loaded, but the default section in that file will not be used,
// instead only the section that matches the value of conf_section_name
// will be read from the default configuration file.
const char* conf_file = nullptr;
// To allow for using the previous default where the 'openssl_conf' appname
// was used, the command line option 'openssl-shared-config' can be used to
// force the old behavior.
if (per_process::cli_options->openssl_shared_config) {
conf_section_name = "openssl_conf";
}
// Use OPENSSL_CONF environment variable is set.
std::string env_openssl_conf;
credentials::SafeGetenv("OPENSSL_CONF", &env_openssl_conf);
if (!env_openssl_conf.empty()) {
conf_file = env_openssl_conf.c_str();
}
// Use --openssl-conf command line option if specified.
if (!per_process::cli_options->openssl_config.empty()) {
conf_file = per_process::cli_options->openssl_config.c_str();
}
OPENSSL_INIT_SETTINGS* settings = OPENSSL_INIT_new();
OPENSSL_INIT_set_config_filename(settings, conf_file);
OPENSSL_INIT_set_config_appname(settings, conf_section_name);
OPENSSL_INIT_set_config_file_flags(settings,
CONF_MFLAGS_IGNORE_MISSING_FILE);
OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CONFIG, settings);
OPENSSL_INIT_free(settings);
if (ERR_peek_error() != 0) {
// XXX: ERR_GET_REASON does not return something that is
// useful as an exit code at all.
result->exit_code_ = ERR_GET_REASON(ERR_peek_error());
result->early_return_ = true;
result->errors_.emplace_back("OpenSSL configuration error:\n" +
GetOpenSSLErrorString());
return result;
}
#else // OPENSSL_VERSION_MAJOR < 3
if (FIPS_mode()) {
OPENSSL_init();
}
#endif
if (!crypto::ProcessFipsOptions()) {
// XXX: ERR_GET_REASON does not return something that is
// useful as an exit code at all.
result->exit_code_ = ERR_GET_REASON(ERR_peek_error());
result->early_return_ = true;
result->errors_.emplace_back(
"OpenSSL error when trying to enable FIPS:\n" +
GetOpenSSLErrorString());
return result;
}
// V8 on Windows doesn't have a good source of entropy. Seed it from
// OpenSSL's pool.
V8::SetEntropySource(crypto::EntropySource);
#endif // HAVE_OPENSSL && !defined(OPENSSL_IS_BORINGSSL)
}
if (!(flags & ProcessInitializationFlags::kNoInitializeNodeV8Platform)) {
per_process::v8_platform.Initialize(
static_cast<int>(per_process::cli_options->v8_thread_pool_size));
result->platform_ = per_process::v8_platform.Platform();
}
if (!(flags & ProcessInitializationFlags::kNoInitializeV8)) {
V8::Initialize();
}
performance::performance_v8_start = PERFORMANCE_NOW();
per_process::v8_initialized = true;
return result;
}
void TearDownOncePerProcess() {
const uint64_t flags = init_process_flags.load();
ResetStdio();
if (!(flags & ProcessInitializationFlags::kNoDefaultSignalHandling)) {
ResetSignalHandlers();
}
per_process::v8_initialized = false;
if (!(flags & ProcessInitializationFlags::kNoInitializeV8)) {
V8::Dispose();
}
#if NODE_USE_V8_WASM_TRAP_HANDLER && defined(_WIN32)
if (!(flags & ProcessInitializationFlags::kNoDefaultSignalHandling)) {
RemoveVectoredExceptionHandler(per_process::old_vectored_exception_handler);
}
#endif
if (!(flags & ProcessInitializationFlags::kNoInitializeNodeV8Platform)) {
V8::DisposePlatform();
// uv_run cannot be called from the time before the beforeExit callback
// runs until the program exits unless the event loop has any referenced
// handles after beforeExit terminates. This prevents unrefed timers
// that happen to terminate during shutdown from being run unsafely.
// Since uv_run cannot be called, uv_async handles held by the platform
// will never be fully cleaned up.
per_process::v8_platform.Dispose();
}
}
InitializationResult::~InitializationResult() {}
InitializationResultImpl::~InitializationResultImpl() {}
int GenerateAndWriteSnapshotData(const SnapshotData** snapshot_data_ptr,
const InitializationResult* result) {
int exit_code = result->exit_code();
// nullptr indicates there's no snapshot data.
DCHECK_NULL(*snapshot_data_ptr);
// node:embedded_snapshot_main indicates that we are using the
// embedded snapshot and we are not supposed to clean it up.
if (result->args()[1] == "node:embedded_snapshot_main") {
*snapshot_data_ptr = SnapshotBuilder::GetEmbeddedSnapshotData();
if (*snapshot_data_ptr == nullptr) {
// The Node.js binary is built without embedded snapshot
fprintf(stderr,
"node:embedded_snapshot_main was specified as snapshot "
"entry point but Node.js was built without embedded "
"snapshot.\n");
exit_code = 1;
return exit_code;
}
} else {
// Otherwise, load and run the specified main script.
std::unique_ptr<SnapshotData> generated_data =
std::make_unique<SnapshotData>();
exit_code = node::SnapshotBuilder::Generate(
generated_data.get(), result->args(), result->exec_args());
if (exit_code == 0) {
*snapshot_data_ptr = generated_data.release();
} else {
return exit_code;
}
}
// Get the path to write the snapshot blob to.
std::string snapshot_blob_path;
if (!per_process::cli_options->snapshot_blob.empty()) {
snapshot_blob_path = per_process::cli_options->snapshot_blob;
} else {
// Defaults to snapshot.blob in the current working directory.
snapshot_blob_path = std::string("snapshot.blob");
}
FILE* fp = fopen(snapshot_blob_path.c_str(), "wb");
if (fp != nullptr) {
(*snapshot_data_ptr)->ToBlob(fp);
fclose(fp);
} else {
fprintf(stderr,
"Cannot open %s for writing a snapshot.\n",
snapshot_blob_path.c_str());
exit_code = 1;
}
return exit_code;
}
int LoadSnapshotDataAndRun(const SnapshotData** snapshot_data_ptr,
const InitializationResult* result) {
int exit_code = result->exit_code();
// nullptr indicates there's no snapshot data.
DCHECK_NULL(*snapshot_data_ptr);
// --snapshot-blob indicates that we are reading a customized snapshot.
if (!per_process::cli_options->snapshot_blob.empty()) {
std::string filename = per_process::cli_options->snapshot_blob;
FILE* fp = fopen(filename.c_str(), "rb");
if (fp == nullptr) {
fprintf(stderr, "Cannot open %s", filename.c_str());
exit_code = 1;
return exit_code;
}
std::unique_ptr<SnapshotData> read_data = std::make_unique<SnapshotData>();
if (!SnapshotData::FromBlob(read_data.get(), fp)) {
// If we fail to read the customized snapshot, simply exit with 1.
exit_code = 1;
return exit_code;
}
*snapshot_data_ptr = read_data.release();
fclose(fp);
} else if (per_process::cli_options->node_snapshot) {
// If --snapshot-blob is not specified, we are reading the embedded
// snapshot, but we will skip it if --no-node-snapshot is specified.
const node::SnapshotData* read_data =
SnapshotBuilder::GetEmbeddedSnapshotData();
if (read_data != nullptr && read_data->Check()) {
// If we fail to read the embedded snapshot, treat it as if Node.js
// was built without one.
*snapshot_data_ptr = read_data;
}
}
if ((*snapshot_data_ptr) != nullptr) {
BuiltinLoader::RefreshCodeCache((*snapshot_data_ptr)->code_cache);
}
NodeMainInstance main_instance(*snapshot_data_ptr,
uv_default_loop(),
per_process::v8_platform.Platform(),
result->args(),
result->exec_args());
exit_code = main_instance.Run();
return exit_code;
}
int Start(int argc, char** argv) {
CHECK_GT(argc, 0);
// Hack around with the argv pointer. Used for process.title = "blah".
argv = uv_setup_args(argc, argv);
std::unique_ptr<InitializationResult> result =
InitializeOncePerProcess(std::vector<std::string>(argv, argv + argc));
for (const std::string& error : result->errors()) {
FPrintF(stderr, "%s: %s\n", result->args().at(0), error);
}
if (result->early_return()) {
return result->exit_code();
}
DCHECK_EQ(result->exit_code(), 0);
const SnapshotData* snapshot_data = nullptr;
auto cleanup_process = OnScopeLeave([&]() {
TearDownOncePerProcess();
if (snapshot_data != nullptr &&
snapshot_data->data_ownership == SnapshotData::DataOwnership::kOwned) {
delete snapshot_data;
}
});
uv_loop_configure(uv_default_loop(), UV_METRICS_IDLE_TIME);
// --build-snapshot indicates that we are in snapshot building mode.
if (per_process::cli_options->build_snapshot) {
if (result->args().size() < 2) {
fprintf(stderr,
"--build-snapshot must be used with an entry point script.\n"
"Usage: node --build-snapshot /path/to/entry.js\n");
return 9;
}
return GenerateAndWriteSnapshotData(&snapshot_data, result.get());
}
// Without --build-snapshot, we are in snapshot loading mode.
return LoadSnapshotDataAndRun(&snapshot_data, result.get());
}
int Stop(Environment* env) {
env->ExitEnv();
return 0;
}
} // namespace node
#if !HAVE_INSPECTOR
void Initialize() {}
NODE_MODULE_CONTEXT_AWARE_INTERNAL(inspector, Initialize)
#endif // !HAVE_INSPECTOR