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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 "debug_utils.h"
#include "node_binding.h"
#include "node_buffer.h"
#include "node_constants.h"
#include "node_context_data.h"
#include "node_errors.h"
#include "node_internals.h"
#include "node_metadata.h"
#include "node_native_module.h"
#include "node_options-inl.h"
#include "node_perf.h"
#include "node_platform.h"
#include "node_process.h"
#include "node_revert.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_io.h"
#endif
#if defined HAVE_DTRACE || defined HAVE_ETW
#include "node_dtrace.h"
#endif
#include "async_wrap-inl.h"
#include "env-inl.h"
#include "handle_wrap.h"
#include "req_wrap-inl.h"
#include "string_bytes.h"
#include "util.h"
#include "uv.h"
#if NODE_USE_V8_PLATFORM
#include "libplatform/libplatform.h"
#endif // NODE_USE_V8_PLATFORM
#include "v8-profiler.h"
#ifdef NODE_ENABLE_VTUNE_PROFILING
#include "../deps/v8/src/third_party/vtune/v8-vtune.h"
#endif
#ifdef NODE_ENABLE_LARGE_CODE_PAGES
#include "large_pages/node_large_page.h"
#endif
#include <errno.h>
#include <fcntl.h> // _O_RDWR
#include <limits.h> // PATH_MAX
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <string>
#include <vector>
#if defined(NODE_HAVE_I18N_SUPPORT)
#include <unicode/uvernum.h>
#endif
#ifdef NODE_REPORT
#include "node_report.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 <unistd.h> // STDIN_FILENO, STDERR_FILENO
#endif
namespace node {
using options_parser::kAllowedInEnvironment;
using options_parser::kDisallowedInEnvironment;
using v8::Array;
using v8::Boolean;
using v8::Context;
using v8::DEFAULT;
using v8::EscapableHandleScope;
using v8::Exception;
using v8::Function;
using v8::FunctionCallbackInfo;
using v8::HandleScope;
using v8::Isolate;
using v8::Just;
using v8::Local;
using v8::Locker;
using v8::Maybe;
using v8::MaybeLocal;
using v8::Object;
using v8::Script;
using v8::SealHandleScope;
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::GetCurrent().
bool v8_initialized = false;
// node_internals.h
// process-relative uptime base in nanoseconds, initialized in node::Start()
uint64_t node_start_time;
// Tells whether --prof is passed.
bool v8_is_profiling = false;
// node_v8_platform-inl.h
struct V8Platform v8_platform;
} // namespace per_process
#ifdef __POSIX__
static const unsigned kMaxSignal = 32;
#endif
void WaitForInspectorDisconnect(Environment* env) {
#if HAVE_INSPECTOR
if (env->inspector_agent()->IsActive()) {
// Restore signal dispositions, the app is done and is no longer
// capable of handling signals.
#if defined(__POSIX__) && !defined(NODE_SHARED_MODE)
struct sigaction act;
memset(&act, 0, sizeof(act));
for (unsigned nr = 1; nr < kMaxSignal; nr += 1) {
if (nr == SIGKILL || nr == SIGSTOP || nr == SIGPROF)
continue;
act.sa_handler = (nr == SIGPIPE) ? SIG_IGN : SIG_DFL;
CHECK_EQ(0, sigaction(nr, &act, nullptr));
}
#endif
env->inspector_agent()->WaitForDisconnect();
}
#endif
}
void SignalExit(int signo) {
uv_tty_reset_mode();
#ifdef __FreeBSD__
// FreeBSD has a nasty bug, see RegisterSignalHandler for details
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = SIG_DFL;
CHECK_EQ(sigaction(signo, &sa, nullptr), 0);
#endif
raise(signo);
}
static 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 =
per_process::native_module_loader.LookupAndCompile(
env->context(), id, parameters, env);
if (maybe_fn.IsEmpty()) {
return MaybeLocal<Value>();
}
Local<Function> fn = maybe_fn.ToLocalChecked();
MaybeLocal<Value> result = fn->Call(env->context(),
Undefined(env->isolate()),
arguments->size(),
arguments->data());
// If there was an error during bootstrap then it was either handled by the
// FatalException handler or it's unrecoverable (e.g. max call stack
// exceeded). Either way, 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);
}
MaybeLocal<Value> RunBootstrapping(Environment* env) {
CHECK(!env->has_run_bootstrapping_code());
EscapableHandleScope scope(env->isolate());
Isolate* isolate = env->isolate();
Local<Context> context = env->context();
std::string coverage;
bool rc = credentials::SafeGetenv("NODE_V8_COVERAGE", &coverage);
if (rc && !coverage.empty()) {
#if HAVE_INSPECTOR
if (!coverage::StartCoverageCollection(env)) {
return MaybeLocal<Value>();
}
#else
fprintf(stderr, "NODE_V8_COVERAGE cannot be used without inspector");
#endif // HAVE_INSPECTOR
}
// Add a reference to the global object
Local<Object> global = context->Global();
#if defined HAVE_DTRACE || defined HAVE_ETW
InitDTrace(env, global);
#endif
Local<Object> process = env->process_object();
// Setting global properties for the bootstrappers to use:
// - global
// Expose the global object as a property on itself
// (Allows you to set stuff on `global` from anywhere in JavaScript.)
global->Set(context, FIXED_ONE_BYTE_STRING(env->isolate(), "global"), global)
.FromJust();
// Store primordials
env->set_primordials(Object::New(isolate));
std::vector<Local<String>> primordials_params = {
env->primordials_string()
};
std::vector<Local<Value>> primordials_args = {
env->primordials()
};
#if HAVE_INSPECTOR
if (env->options()->debug_options().break_node_first_line) {
env->inspector_agent()->PauseOnNextJavascriptStatement(
"Break at bootstrap");
}
#endif // HAVE_INSPECTOR
MaybeLocal<Value> primordials_ret =
ExecuteBootstrapper(env,
"internal/bootstrap/primordials",
&primordials_params,
&primordials_args);
if (primordials_ret.IsEmpty()) {
return MaybeLocal<Value>();
}
// Create binding loaders
std::vector<Local<String>> loaders_params = {
env->process_string(),
FIXED_ONE_BYTE_STRING(isolate, "getLinkedBinding"),
FIXED_ONE_BYTE_STRING(isolate, "getInternalBinding"),
// --experimental-modules
FIXED_ONE_BYTE_STRING(isolate, "experimentalModules"),
// --expose-internals
FIXED_ONE_BYTE_STRING(isolate, "exposeInternals"),
env->primordials_string()};
std::vector<Local<Value>> loaders_args = {
process,
env->NewFunctionTemplate(binding::GetLinkedBinding)
->GetFunction(context)
.ToLocalChecked(),
env->NewFunctionTemplate(binding::GetInternalBinding)
->GetFunction(context)
.ToLocalChecked(),
Boolean::New(isolate, env->options()->experimental_modules),
Boolean::New(isolate, env->options()->expose_internals),
env->primordials()};
// Bootstrap internal loaders
MaybeLocal<Value> loader_exports = ExecuteBootstrapper(
env, "internal/bootstrap/loaders", &loaders_params, &loaders_args);
if (loader_exports.IsEmpty()) {
return MaybeLocal<Value>();
}
Local<Object> loader_exports_obj =
loader_exports.ToLocalChecked().As<Object>();
Local<Value> internal_binding_loader =
loader_exports_obj->Get(context, env->internal_binding_string())
.ToLocalChecked();
env->set_internal_binding_loader(internal_binding_loader.As<Function>());
Local<Value> require =
loader_exports_obj->Get(context, env->require_string()).ToLocalChecked();
env->set_native_module_require(require.As<Function>());
// process, loaderExports, isMainThread, ownsProcessState, primordials
std::vector<Local<String>> node_params = {
env->process_string(),
FIXED_ONE_BYTE_STRING(isolate, "loaderExports"),
FIXED_ONE_BYTE_STRING(isolate, "isMainThread"),
FIXED_ONE_BYTE_STRING(isolate, "ownsProcessState"),
env->primordials_string()};
std::vector<Local<Value>> node_args = {
process,
loader_exports_obj,
Boolean::New(isolate, env->is_main_thread()),
Boolean::New(isolate, env->owns_process_state()),
env->primordials()};
MaybeLocal<Value> result = ExecuteBootstrapper(
env, "internal/bootstrap/node", &node_params, &node_args);
env->set_has_run_bootstrapping_code(true);
return scope.EscapeMaybe(result);
}
void MarkBootstrapComplete(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
env->performance_state()->Mark(
performance::NODE_PERFORMANCE_MILESTONE_BOOTSTRAP_COMPLETE);
}
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(),
FIXED_ONE_BYTE_STRING(env->isolate(), "markBootstrapComplete")};
std::vector<Local<Value>> arguments = {
env->process_object(),
env->native_module_require(),
env->internal_binding_loader(),
env->NewFunctionTemplate(MarkBootstrapComplete)
->GetFunction(env->context())
.ToLocalChecked()};
MaybeLocal<Value> result =
ExecuteBootstrapper(env, main_script_id, &parameters, &arguments);
return scope.EscapeMaybe(result);
}
MaybeLocal<Value> StartMainThreadExecution(Environment* env) {
// To allow people to extend Node in different ways, this hook allows
// one to drop a file lib/_third_party_main.js into the build
// directory which will be executed instead of Node's normal loading.
if (per_process::native_module_loader.Exists("_third_party_main")) {
return StartExecution(env, "internal/main/run_third_party_main");
}
if (env->execution_mode() == Environment::ExecutionMode::kInspect ||
env->execution_mode() == Environment::ExecutionMode::kDebug) {
return StartExecution(env, "internal/main/inspect");
}
if (per_process::cli_options->print_help) {
env->set_execution_mode(Environment::ExecutionMode::kPrintHelp);
return StartExecution(env, "internal/main/print_help");
}
if (per_process::cli_options->print_bash_completion) {
env->set_execution_mode(Environment::ExecutionMode::kPrintBashCompletion);
return StartExecution(env, "internal/main/print_bash_completion");
}
if (env->options()->prof_process) {
env->set_execution_mode(Environment::ExecutionMode::kPrintBashCompletion);
return StartExecution(env, "internal/main/prof_process");
}
// -e/--eval without -i/--interactive
if (env->options()->has_eval_string && !env->options()->force_repl) {
env->set_execution_mode(Environment::ExecutionMode::kEvalString);
return StartExecution(env, "internal/main/eval_string");
}
if (env->options()->syntax_check_only) {
env->set_execution_mode(Environment::ExecutionMode::kCheckSyntax);
return StartExecution(env, "internal/main/check_syntax");
}
if (env->execution_mode() == Environment::ExecutionMode::kRunMainModule) {
return StartExecution(env, "internal/main/run_main_module");
}
if (env->options()->force_repl || uv_guess_handle(STDIN_FILENO) == UV_TTY) {
env->set_execution_mode(Environment::ExecutionMode::kRepl);
return StartExecution(env, "internal/main/repl");
}
env->set_execution_mode(Environment::ExecutionMode::kEvalStdin);
return StartExecution(env, "internal/main/eval_stdin");
}
void LoadEnvironment(Environment* env) {
CHECK(env->is_main_thread());
// TODO(joyeecheung): Not all of the execution modes in
// StartMainThreadExecution() make sense for embedders. Pick the
// useful ones out, and allow embedders to customize the entry
// point more directly without using _third_party_main.js
if (!RunBootstrapping(env).IsEmpty()) {
USE(StartMainThreadExecution(env));
}
}
#ifdef __POSIX__
void RegisterSignalHandler(int signal,
void (*handler)(int signal),
bool reset_handler) {
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = handler;
#ifndef __FreeBSD__
// FreeBSD has a nasty bug with SA_RESETHAND reseting the SA_SIGINFO, that is
// in turn set for a libthr wrapper. This leads to a crash.
// Work around the issue by manually setting SIG_DFL in the signal handler
sa.sa_flags = reset_handler ? SA_RESETHAND : 0;
#endif
sigfillset(&sa.sa_mask);
CHECK_EQ(sigaction(signal, &sa, nullptr), 0);
}
#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 (int fd = STDIN_FILENO; fd <= STDERR_FILENO; fd += 1) {
struct stat ignored;
if (fstat(fd, &ignored) == 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 HAVE_INSPECTOR
CHECK_EQ(err, 0);
#endif // HAVE_INSPECTOR
#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) ? SIG_IGN : SIG_DFL;
CHECK_EQ(0, sigaction(nr, &act, nullptr));
}
#endif // !NODE_SHARED_MODE
RegisterSignalHandler(SIGINT, SignalExit, true);
RegisterSignalHandler(SIGTERM, SignalExit, true);
// 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
}
int ProcessGlobalArgs(std::vector<std::string>* args,
std::vector<std::string>* exec_args,
std::vector<std::string>* errors,
bool is_env) {
// 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::PerProcessOptionsParser::instance.Parse(
args,
exec_args,
&v8_args,
per_process::cli_options.get(),
is_env ? kAllowedInEnvironment : kDisallowedInEnvironment,
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;
}
}
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;
}
// TODO(bnoordhuis) Intercept --prof arguments and start the CPU profiler
// manually? That would give us a little more control over its runtime
// behavior but it could also interfere with the user's intentions in ways
// we fail to anticipate. Dillema.
if (std::find(v8_args.begin(), v8_args.end(), "--prof") != v8_args.end()) {
per_process::v8_is_profiling = 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 (per_process::v8_is_profiling) {
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;
}
int Init(std::vector<std::string>* argv,
std::vector<std::string>* exec_argv,
std::vector<std::string>* errors) {
// Register built-in modules
binding::RegisterBuiltinModules();
// Make inherited handles noninheritable.
uv_disable_stdio_inheritance();
#ifdef NODE_REPORT
// Cache the original command line to be
// used in diagnostic reports.
per_process::cli_options->cmdline = *argv;
#endif // NODE_REPORT
#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
std::shared_ptr<EnvironmentOptions> default_env_options =
per_process::cli_options->per_isolate->per_env;
{
std::string text;
default_env_options->pending_deprecation =
credentials::SafeGetenv("NODE_PENDING_DEPRECATION", &text) &&
text[0] == '1';
}
// Allow for environment set preserving symlinks.
{
std::string text;
default_env_options->preserve_symlinks =
credentials::SafeGetenv("NODE_PRESERVE_SYMLINKS", &text) &&
text[0] == '1';
}
{
std::string text;
default_env_options->preserve_symlinks_main =
credentials::SafeGetenv("NODE_PRESERVE_SYMLINKS_MAIN", &text) &&
text[0] == '1';
}
if (default_env_options->redirect_warnings.empty()) {
credentials::SafeGetenv("NODE_REDIRECT_WARNINGS",
&default_env_options->redirect_warnings);
}
#if HAVE_OPENSSL
std::string* openssl_config = &per_process::cli_options->openssl_config;
if (openssl_config->empty()) {
credentials::SafeGetenv("OPENSSL_CONF", openssl_config);
}
#endif
#if !defined(NODE_WITHOUT_NODE_OPTIONS)
std::string node_options;
if (credentials::SafeGetenv("NODE_OPTIONS", &node_options)) {
// [0] is expected to be the program name, fill it in from the real argv
// and use 'x' as a placeholder while parsing.
std::vector<std::string> env_argv = SplitString("x " + node_options, ' ');
env_argv[0] = argv->at(0);
const int exit_code = ProcessGlobalArgs(&env_argv, nullptr, errors, true);
if (exit_code != 0) return exit_code;
}
#endif
const int exit_code = ProcessGlobalArgs(argv, exec_argv, errors, false);
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 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);
// 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();
#endif
// 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;
}
// TODO(addaleax): Deprecate and eventually remove this.
void Init(int* argc,
const char** argv,
int* exec_argc,
const char*** exec_argv) {
std::vector<std::string> argv_(argv, argv + *argc); // NOLINT
std::vector<std::string> exec_argv_;
std::vector<std::string> errors;
// This (approximately) duplicates some logic that has been moved to
// node::Start(), with the difference that here we explicitly call `exit()`.
int exit_code = Init(&argv_, &exec_argv_, &errors);
for (const std::string& error : errors)
fprintf(stderr, "%s: %s\n", argv_.at(0).c_str(), error.c_str());
if (exit_code != 0) exit(exit_code);
if (per_process::cli_options->print_version) {
printf("%s\n", NODE_VERSION);
exit(0);
}
if (per_process::cli_options->print_v8_help) {
V8::SetFlagsFromString("--help", 6); // Doesn't return.
UNREACHABLE();
}
*argc = argv_.size();
*exec_argc = exec_argv_.size();
// These leak memory, because, in the original code of this function, no
// extra allocations were visible. This should be okay because this function
// is only supposed to be called once per process, though.
*exec_argv = Malloc<const char*>(*exec_argc);
for (int i = 0; i < *exec_argc; ++i)
(*exec_argv)[i] = strdup(exec_argv_[i].c_str());
for (int i = 0; i < *argc; ++i)
argv[i] = strdup(argv_[i].c_str());
}
void RunBeforeExit(Environment* env) {
env->RunBeforeExitCallbacks();
if (!uv_loop_alive(env->event_loop()))
EmitBeforeExit(env);
}
inline int Start(Isolate* isolate, IsolateData* isolate_data,
const std::vector<std::string>& args,
const std::vector<std::string>& exec_args) {
HandleScope handle_scope(isolate);
Local<Context> context = NewContext(isolate);
Context::Scope context_scope(context);
Environment env(
isolate_data,
context,
static_cast<Environment::Flags>(Environment::kIsMainThread |
Environment::kOwnsProcessState |
Environment::kOwnsInspector));
env.Start(per_process::v8_is_profiling);
env.ProcessCliArgs(args, exec_args);
#if HAVE_INSPECTOR && NODE_USE_V8_PLATFORM
CHECK(!env.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.
env.inspector_agent()->Start(args.size() > 1 ? args[1].c_str() : "",
env.options()->debug_options(),
env.inspector_host_port(),
true);
if (env.options()->debug_options().inspector_enabled &&
!env.inspector_agent()->IsListening()) {
return 12; // Signal internal error.
}
#else
// inspector_enabled can't be true if !HAVE_INSPECTOR or !NODE_USE_V8_PLATFORM
// - the option parser should not allow that.
CHECK(!env.options()->debug_options().inspector_enabled);
#endif // HAVE_INSPECTOR && NODE_USE_V8_PLATFORM
{
Environment::AsyncCallbackScope callback_scope(&env);
env.async_hooks()->push_async_ids(1, 0);
LoadEnvironment(&env);
env.async_hooks()->pop_async_id(1);
}
{
SealHandleScope seal(isolate);
bool more;
env.performance_state()->Mark(
node::performance::NODE_PERFORMANCE_MILESTONE_LOOP_START);
do {
uv_run(env.event_loop(), UV_RUN_DEFAULT);
per_process::v8_platform.DrainVMTasks(isolate);
more = uv_loop_alive(env.event_loop());
if (more)
continue;
RunBeforeExit(&env);
// Emit `beforeExit` if the loop became alive either after emitting
// event, or after running some callbacks.
more = uv_loop_alive(env.event_loop());
} while (more == true);
env.performance_state()->Mark(
node::performance::NODE_PERFORMANCE_MILESTONE_LOOP_EXIT);
}
env.set_trace_sync_io(false);
const int exit_code = EmitExit(&env);
WaitForInspectorDisconnect(&env);
env.set_can_call_into_js(false);
env.stop_sub_worker_contexts();
uv_tty_reset_mode();
env.RunCleanup();
RunAtExit(&env);
per_process::v8_platform.DrainVMTasks(isolate);
per_process::v8_platform.CancelVMTasks(isolate);
#if defined(LEAK_SANITIZER)
__lsan_do_leak_check();
#endif
return exit_code;
}
inline int Start(uv_loop_t* event_loop,
const std::vector<std::string>& args,
const std::vector<std::string>& exec_args) {
std::unique_ptr<ArrayBufferAllocator, decltype(&FreeArrayBufferAllocator)>
allocator(CreateArrayBufferAllocator(), &FreeArrayBufferAllocator);
Isolate* const isolate = NewIsolate(allocator.get(), event_loop);
if (isolate == nullptr)
return 12; // Signal internal error.
if (per_process::cli_options->print_version) {
printf("%s\n", NODE_VERSION);
return 0;
}
if (per_process::cli_options->print_v8_help) {
V8::SetFlagsFromString("--help", 6); // Doesn't return.
UNREACHABLE();
}
int exit_code;
{
Locker locker(isolate);
Isolate::Scope isolate_scope(isolate);
HandleScope handle_scope(isolate);
std::unique_ptr<IsolateData, decltype(&FreeIsolateData)> isolate_data(
CreateIsolateData(isolate,
event_loop,
per_process::v8_platform.Platform(),
allocator.get()),
&FreeIsolateData);
// TODO(addaleax): This should load a real per-Isolate option, currently
// this is still effectively per-process.
if (isolate_data->options()->track_heap_objects) {
isolate->GetHeapProfiler()->StartTrackingHeapObjects(true);
}
exit_code =
Start(isolate, isolate_data.get(), args, exec_args);
}
isolate->Dispose();
per_process::v8_platform.Platform()->UnregisterIsolate(isolate);
return exit_code;
}
int Start(int argc, char** argv) {
atexit([] () { uv_tty_reset_mode(); });
PlatformInit();
per_process::node_start_time = uv_hrtime();
CHECK_GT(argc, 0);
#ifdef NODE_ENABLE_LARGE_CODE_PAGES
if (node::IsLargePagesEnabled()) {
if (node::MapStaticCodeToLargePages() != 0) {
fprintf(stderr, "Reverting to default page size\n");
}
}
#endif
// Hack around with the argv pointer. Used for process.title = "blah".
argv = uv_setup_args(argc, argv);
std::vector<std::string> args(argv, argv + argc);
std::vector<std::string> exec_args;
std::vector<std::string> errors;
// This needs to run *before* V8::Initialize().
{
const int exit_code = Init(&args, &exec_args, &errors);
for (const std::string& error : errors)
fprintf(stderr, "%s: %s\n", args.at(0).c_str(), error.c_str());
if (exit_code != 0) return exit_code;
}
#if HAVE_OPENSSL
{
std::string extra_ca_certs;
if (credentials::SafeGetenv("NODE_EXTRA_CA_CERTS", &extra_ca_certs))
crypto::UseExtraCaCerts(extra_ca_certs);
}
#ifdef NODE_FIPS_MODE
// In the case of FIPS builds we should make sure
// the random source is properly initialized first.
OPENSSL_init();
#endif // NODE_FIPS_MODE
// V8 on Windows doesn't have a good source of entropy. Seed it from
// OpenSSL's pool.
V8::SetEntropySource(crypto::EntropySource);
#endif // HAVE_OPENSSL
InitializeV8Platform(per_process::cli_options->v8_thread_pool_size);
V8::Initialize();
performance::performance_v8_start = PERFORMANCE_NOW();
per_process::v8_initialized = true;
const int exit_code =
Start(uv_default_loop(), args, exec_args);
per_process::v8_initialized = false;
V8::Dispose();
// 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();
return exit_code;
}
} // namespace node
#if !HAVE_INSPECTOR
void Initialize() {}
NODE_MODULE_CONTEXT_AWARE_INTERNAL(inspector, Initialize)
#endif // !HAVE_INSPECTOR