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chromium / external / github.com / v8 / node / refs/heads/vee-eight-lkgr / . / src / node.cc
blob: b88088c34860e14c6ad201d3ff173342c0522bbc [file] [log] [blame] [edit]
// 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_buffer.h"
#include "node_constants.h"
#include "node_javascript.h"
#include "node_code_cache.h"
#include "node_platform.h"
#include "node_version.h"
#include "node_internals.h"
#include "node_revert.h"
#include "node_perf.h"
#include "node_context_data.h"
#include "tracing/traced_value.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 "ares.h"
#include "async_wrap-inl.h"
#include "env-inl.h"
#include "handle_wrap.h"
#include "http_parser.h"
#include "nghttp2/nghttp2ver.h"
#include "req_wrap-inl.h"
#include "string_bytes.h"
#include "tracing/agent.h"
#include "tracing/node_trace_writer.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"
#include "zlib.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
#if defined(LEAK_SANITIZER)
#include <sanitizer/lsan_interface.h>
#endif
#if defined(_MSC_VER)
#include <direct.h>
#include <io.h>
#define umask _umask
typedef int mode_t;
#else
#include <pthread.h>
#include <sys/resource.h> // getrlimit, setrlimit
#include <unistd.h> // setuid, getuid
#endif
#if defined(__POSIX__) && !defined(__ANDROID__) && !defined(__CloudABI__)
#include <pwd.h> // getpwnam()
#include <grp.h> // getgrnam()
#endif
#if defined(__POSIX__)
#include <dlfcn.h>
#endif
// This is used to load built-in modules. Instead of using
// __attribute__((constructor)), we call the _register_<modname>
// function for each built-in modules explicitly in
// node::RegisterBuiltinModules(). This is only forward declaration.
// The definitions are in each module's implementation when calling
// the NODE_BUILTIN_MODULE_CONTEXT_AWARE.
#define V(modname) void _register_##modname();
NODE_BUILTIN_MODULES(V)
#undef V
namespace node {
using options_parser::kAllowedInEnvironment;
using options_parser::kDisallowedInEnvironment;
using v8::Array;
using v8::Boolean;
using v8::Context;
using v8::DEFAULT;
using v8::DontEnum;
using v8::EscapableHandleScope;
using v8::Exception;
using v8::Function;
using v8::FunctionCallbackInfo;
using v8::HandleScope;
using v8::Int32;
using v8::Integer;
using v8::Isolate;
using v8::Just;
using v8::Local;
using v8::Locker;
using v8::Maybe;
using v8::MaybeLocal;
using v8::Message;
using v8::MicrotasksPolicy;
using v8::NamedPropertyHandlerConfiguration;
using v8::NewStringType;
using v8::None;
using v8::Nothing;
using v8::Null;
using v8::Object;
using v8::ObjectTemplate;
using v8::PropertyAttribute;
using v8::ReadOnly;
using v8::Script;
using v8::ScriptCompiler;
using v8::ScriptOrigin;
using v8::SealHandleScope;
using v8::SideEffectType;
using v8::String;
using v8::TracingController;
using v8::TryCatch;
using v8::Undefined;
using v8::V8;
using v8::Value;
static bool v8_is_profiling = false;
static bool node_is_initialized = false;
static uv_once_t init_modpending_once = UV_ONCE_INIT;
static uv_key_t thread_local_modpending;
static node_module* modlist_builtin;
static node_module* modlist_internal;
static node_module* modlist_linked;
static node_module* modlist_addon;
// Bit flag used to track security reverts (see node_revert.h)
unsigned int reverted = 0;
bool v8_initialized = false;
bool linux_at_secure = false;
// process-relative uptime base, initialized at start-up
double prog_start_time;
Mutex per_process_opts_mutex;
std::shared_ptr<PerProcessOptions> per_process_opts {
new PerProcessOptions() };
static Mutex node_isolate_mutex;
static Isolate* node_isolate;
// Ensures that __metadata trace events are only emitted
// when tracing is enabled.
class NodeTraceStateObserver :
public TracingController::TraceStateObserver {
public:
void OnTraceEnabled() override {
char name_buffer[512];
if (uv_get_process_title(name_buffer, sizeof(name_buffer)) == 0) {
// Only emit the metadata event if the title can be retrieved
// successfully. Ignore it otherwise.
TRACE_EVENT_METADATA1("__metadata", "process_name",
"name", TRACE_STR_COPY(name_buffer));
}
TRACE_EVENT_METADATA1("__metadata", "version",
"node", NODE_VERSION_STRING);
TRACE_EVENT_METADATA1("__metadata", "thread_name",
"name", "JavaScriptMainThread");
auto trace_process = tracing::TracedValue::Create();
trace_process->BeginDictionary("versions");
const char http_parser_version[] =
NODE_STRINGIFY(HTTP_PARSER_VERSION_MAJOR)
"."
NODE_STRINGIFY(HTTP_PARSER_VERSION_MINOR)
"."
NODE_STRINGIFY(HTTP_PARSER_VERSION_PATCH);
const char node_napi_version[] = NODE_STRINGIFY(NAPI_VERSION);
const char node_modules_version[] = NODE_STRINGIFY(NODE_MODULE_VERSION);
trace_process->SetString("http_parser", http_parser_version);
trace_process->SetString("node", NODE_VERSION_STRING);
trace_process->SetString("v8", V8::GetVersion());
trace_process->SetString("uv", uv_version_string());
trace_process->SetString("zlib", ZLIB_VERSION);
trace_process->SetString("ares", ARES_VERSION_STR);
trace_process->SetString("modules", node_modules_version);
trace_process->SetString("nghttp2", NGHTTP2_VERSION);
trace_process->SetString("napi", node_napi_version);
#if HAVE_OPENSSL
trace_process->SetString("openssl", crypto::GetOpenSSLVersion());
#endif
trace_process->EndDictionary();
trace_process->SetString("arch", NODE_ARCH);
trace_process->SetString("platform", NODE_PLATFORM);
trace_process->BeginDictionary("release");
trace_process->SetString("name", NODE_RELEASE);
#if NODE_VERSION_IS_LTS
trace_process->SetString("lts", NODE_VERSION_LTS_CODENAME);
#endif
trace_process->EndDictionary();
TRACE_EVENT_METADATA1("__metadata", "node",
"process", std::move(trace_process));
// This only runs the first time tracing is enabled
controller_->RemoveTraceStateObserver(this);
delete this;
}
void OnTraceDisabled() override {
// Do nothing here. This should never be called because the
// observer removes itself when OnTraceEnabled() is called.
UNREACHABLE();
}
explicit NodeTraceStateObserver(TracingController* controller) :
controller_(controller) {}
~NodeTraceStateObserver() override {}
private:
TracingController* controller_;
};
static struct {
#if NODE_USE_V8_PLATFORM
void Initialize(int thread_pool_size) {
tracing_agent_.reset(new tracing::Agent());
node::tracing::TraceEventHelper::SetAgent(tracing_agent_.get());
auto controller = tracing_agent_->GetTracingController();
controller->AddTraceStateObserver(new NodeTraceStateObserver(controller));
StartTracingAgent();
// Tracing must be initialized before platform threads are created.
platform_ = new NodePlatform(thread_pool_size, controller);
V8::InitializePlatform(platform_);
}
void Dispose() {
platform_->Shutdown();
delete platform_;
platform_ = nullptr;
// Destroy tracing after the platform (and platform threads) have been
// stopped.
tracing_agent_.reset(nullptr);
}
void DrainVMTasks(Isolate* isolate) {
platform_->DrainTasks(isolate);
}
void CancelVMTasks(Isolate* isolate) {
platform_->CancelPendingDelayedTasks(isolate);
}
#if HAVE_INSPECTOR
bool StartInspector(Environment* env, const char* script_path,
std::shared_ptr<DebugOptions> options) {
// 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.
return env->inspector_agent()->Start(
script_path == nullptr ? "" : script_path, options, true);
}
bool InspectorStarted(Environment* env) {
return env->inspector_agent()->IsListening();
}
#endif // HAVE_INSPECTOR
void StartTracingAgent() {
if (per_process_opts->trace_event_categories.empty()) {
tracing_file_writer_ = tracing_agent_->DefaultHandle();
} else {
tracing_file_writer_ = tracing_agent_->AddClient(
ParseCommaSeparatedSet(per_process_opts->trace_event_categories),
std::unique_ptr<tracing::AsyncTraceWriter>(
new tracing::NodeTraceWriter(
per_process_opts->trace_event_file_pattern)),
tracing::Agent::kUseDefaultCategories);
}
}
void StopTracingAgent() {
tracing_file_writer_.reset();
}
tracing::AgentWriterHandle* GetTracingAgentWriter() {
return &tracing_file_writer_;
}
NodePlatform* Platform() {
return platform_;
}
std::unique_ptr<tracing::Agent> tracing_agent_;
tracing::AgentWriterHandle tracing_file_writer_;
NodePlatform* platform_;
#else // !NODE_USE_V8_PLATFORM
void Initialize(int thread_pool_size) {}
void Dispose() {}
void DrainVMTasks(Isolate* isolate) {}
void CancelVMTasks(Isolate* isolate) {}
bool StartInspector(Environment* env, const char* script_path,
const DebugOptions& options) {
env->ThrowError("Node compiled with NODE_USE_V8_PLATFORM=0");
return true;
}
void StartTracingAgent() {
if (!trace_enabled_categories.empty()) {
fprintf(stderr, "Node compiled with NODE_USE_V8_PLATFORM=0, "
"so event tracing is not available.\n");
}
}
void StopTracingAgent() {}
tracing::AgentWriterHandle* GetTracingAgentWriter() {
return nullptr;
}
NodePlatform* Platform() {
return nullptr;
}
#endif // !NODE_USE_V8_PLATFORM
#if !NODE_USE_V8_PLATFORM || !HAVE_INSPECTOR
bool InspectorStarted(Environment* env) {
return false;
}
#endif // !NODE_USE_V8_PLATFORM || !HAVE_INSPECTOR
} v8_platform;
#ifdef __POSIX__
static const unsigned kMaxSignal = 32;
#endif
void PrintErrorString(const char* format, ...) {
va_list ap;
va_start(ap, format);
#ifdef _WIN32
HANDLE stderr_handle = GetStdHandle(STD_ERROR_HANDLE);
// Check if stderr is something other than a tty/console
if (stderr_handle == INVALID_HANDLE_VALUE ||
stderr_handle == nullptr ||
uv_guess_handle(_fileno(stderr)) != UV_TTY) {
vfprintf(stderr, format, ap);
va_end(ap);
return;
}
// Fill in any placeholders
int n = _vscprintf(format, ap);
std::vector<char> out(n + 1);
vsprintf(out.data(), format, ap);
// Get required wide buffer size
n = MultiByteToWideChar(CP_UTF8, 0, out.data(), -1, nullptr, 0);
std::vector<wchar_t> wbuf(n);
MultiByteToWideChar(CP_UTF8, 0, out.data(), -1, wbuf.data(), n);
// Don't include the null character in the output
CHECK_GT(n, 0);
WriteConsoleW(stderr_handle, wbuf.data(), n - 1, nullptr, nullptr);
#else
vfprintf(stderr, format, ap);
#endif
va_end(ap);
}
const char* signo_string(int signo) {
#define SIGNO_CASE(e) case e: return #e;
switch (signo) {
#ifdef SIGHUP
SIGNO_CASE(SIGHUP);
#endif
#ifdef SIGINT
SIGNO_CASE(SIGINT);
#endif
#ifdef SIGQUIT
SIGNO_CASE(SIGQUIT);
#endif
#ifdef SIGILL
SIGNO_CASE(SIGILL);
#endif
#ifdef SIGTRAP
SIGNO_CASE(SIGTRAP);
#endif
#ifdef SIGABRT
SIGNO_CASE(SIGABRT);
#endif
#ifdef SIGIOT
# if SIGABRT != SIGIOT
SIGNO_CASE(SIGIOT);
# endif
#endif
#ifdef SIGBUS
SIGNO_CASE(SIGBUS);
#endif
#ifdef SIGFPE
SIGNO_CASE(SIGFPE);
#endif
#ifdef SIGKILL
SIGNO_CASE(SIGKILL);
#endif
#ifdef SIGUSR1
SIGNO_CASE(SIGUSR1);
#endif
#ifdef SIGSEGV
SIGNO_CASE(SIGSEGV);
#endif
#ifdef SIGUSR2
SIGNO_CASE(SIGUSR2);
#endif
#ifdef SIGPIPE
SIGNO_CASE(SIGPIPE);
#endif
#ifdef SIGALRM
SIGNO_CASE(SIGALRM);
#endif
SIGNO_CASE(SIGTERM);
#ifdef SIGCHLD
SIGNO_CASE(SIGCHLD);
#endif
#ifdef SIGSTKFLT
SIGNO_CASE(SIGSTKFLT);
#endif
#ifdef SIGCONT
SIGNO_CASE(SIGCONT);
#endif
#ifdef SIGSTOP
SIGNO_CASE(SIGSTOP);
#endif
#ifdef SIGTSTP
SIGNO_CASE(SIGTSTP);
#endif
#ifdef SIGBREAK
SIGNO_CASE(SIGBREAK);
#endif
#ifdef SIGTTIN
SIGNO_CASE(SIGTTIN);
#endif
#ifdef SIGTTOU
SIGNO_CASE(SIGTTOU);
#endif
#ifdef SIGURG
SIGNO_CASE(SIGURG);
#endif
#ifdef SIGXCPU
SIGNO_CASE(SIGXCPU);
#endif
#ifdef SIGXFSZ
SIGNO_CASE(SIGXFSZ);
#endif
#ifdef SIGVTALRM
SIGNO_CASE(SIGVTALRM);
#endif
#ifdef SIGPROF
SIGNO_CASE(SIGPROF);
#endif
#ifdef SIGWINCH
SIGNO_CASE(SIGWINCH);
#endif
#ifdef SIGIO
SIGNO_CASE(SIGIO);
#endif
#ifdef SIGPOLL
# if SIGPOLL != SIGIO
SIGNO_CASE(SIGPOLL);
# endif
#endif
#ifdef SIGLOST
# if SIGLOST != SIGABRT
SIGNO_CASE(SIGLOST);
# endif
#endif
#ifdef SIGPWR
# if SIGPWR != SIGLOST
SIGNO_CASE(SIGPWR);
# endif
#endif
#ifdef SIGINFO
# if !defined(SIGPWR) || SIGINFO != SIGPWR
SIGNO_CASE(SIGINFO);
# endif
#endif
#ifdef SIGSYS
SIGNO_CASE(SIGSYS);
#endif
default: return "";
}
}
// Look up environment variable unless running as setuid root.
bool SafeGetenv(const char* key, std::string* text) {
#if !defined(__CloudABI__) && !defined(_WIN32)
if (linux_at_secure || getuid() != geteuid() || getgid() != getegid())
goto fail;
#endif
{
Mutex::ScopedLock lock(environ_mutex);
if (const char* value = getenv(key)) {
*text = value;
return true;
}
}
fail:
text->clear();
return false;
}
void* ArrayBufferAllocator::Allocate(size_t size) {
if (zero_fill_field_ || per_process_opts->zero_fill_all_buffers)
return UncheckedCalloc(size);
else
return UncheckedMalloc(size);
}
namespace {
bool ShouldAbortOnUncaughtException(Isolate* isolate) {
HandleScope scope(isolate);
Environment* env = Environment::GetCurrent(isolate);
return env != nullptr &&
env->should_abort_on_uncaught_toggle()[0] &&
!env->inside_should_not_abort_on_uncaught_scope();
}
} // anonymous namespace
void AddPromiseHook(Isolate* isolate, promise_hook_func fn, void* arg) {
Environment* env = Environment::GetCurrent(isolate);
CHECK_NOT_NULL(env);
env->AddPromiseHook(fn, arg);
}
void AddEnvironmentCleanupHook(Isolate* isolate,
void (*fun)(void* arg),
void* arg) {
Environment* env = Environment::GetCurrent(isolate);
CHECK_NOT_NULL(env);
env->AddCleanupHook(fun, arg);
}
void RemoveEnvironmentCleanupHook(Isolate* isolate,
void (*fun)(void* arg),
void* arg) {
Environment* env = Environment::GetCurrent(isolate);
CHECK_NOT_NULL(env);
env->RemoveCleanupHook(fun, arg);
}
MaybeLocal<Value> InternalMakeCallback(Environment* env,
Local<Object> recv,
const Local<Function> callback,
int argc,
Local<Value> argv[],
async_context asyncContext) {
CHECK(!recv.IsEmpty());
InternalCallbackScope scope(env, recv, asyncContext);
if (scope.Failed()) {
return MaybeLocal<Value>();
}
Local<Function> domain_cb = env->domain_callback();
MaybeLocal<Value> ret;
if (asyncContext.async_id != 0 || domain_cb.IsEmpty() || recv.IsEmpty()) {
ret = callback->Call(env->context(), recv, argc, argv);
} else {
std::vector<Local<Value>> args(1 + argc);
args[0] = callback;
std::copy(&argv[0], &argv[argc], args.begin() + 1);
ret = domain_cb->Call(env->context(), recv, args.size(), &args[0]);
}
if (ret.IsEmpty()) {
scope.MarkAsFailed();
return MaybeLocal<Value>();
}
scope.Close();
if (scope.Failed()) {
return MaybeLocal<Value>();
}
return ret;
}
// Public MakeCallback()s
MaybeLocal<Value> MakeCallback(Isolate* isolate,
Local<Object> recv,
const char* method,
int argc,
Local<Value> argv[],
async_context asyncContext) {
Local<String> method_string =
String::NewFromUtf8(isolate, method, NewStringType::kNormal)
.ToLocalChecked();
return MakeCallback(isolate, recv, method_string, argc, argv, asyncContext);
}
MaybeLocal<Value> MakeCallback(Isolate* isolate,
Local<Object> recv,
Local<String> symbol,
int argc,
Local<Value> argv[],
async_context asyncContext) {
Local<Value> callback_v = recv->Get(symbol);
if (callback_v.IsEmpty()) return Local<Value>();
if (!callback_v->IsFunction()) return Local<Value>();
Local<Function> callback = callback_v.As<Function>();
return MakeCallback(isolate, recv, callback, argc, argv, asyncContext);
}
MaybeLocal<Value> MakeCallback(Isolate* isolate,
Local<Object> recv,
Local<Function> callback,
int argc,
Local<Value> argv[],
async_context asyncContext) {
// Observe the following two subtleties:
//
// 1. The environment is retrieved from the callback function's context.
// 2. The context to enter is retrieved from the environment.
//
// Because of the AssignToContext() call in src/node_contextify.cc,
// the two contexts need not be the same.
Environment* env = Environment::GetCurrent(callback->CreationContext());
CHECK_NOT_NULL(env);
Context::Scope context_scope(env->context());
MaybeLocal<Value> ret = InternalMakeCallback(env, recv, callback,
argc, argv, asyncContext);
if (ret.IsEmpty() && env->makecallback_depth() == 0) {
// This is only for legacy compatiblity and we may want to look into
// removing/adjusting it.
return Undefined(env->isolate());
}
return ret;
}
// Legacy MakeCallback()s
Local<Value> MakeCallback(Isolate* isolate,
Local<Object> recv,
const char* method,
int argc,
Local<Value>* argv) {
EscapableHandleScope handle_scope(isolate);
return handle_scope.Escape(
MakeCallback(isolate, recv, method, argc, argv, {0, 0})
.FromMaybe(Local<Value>()));
}
Local<Value> MakeCallback(Isolate* isolate,
Local<Object> recv,
Local<String> symbol,
int argc,
Local<Value>* argv) {
EscapableHandleScope handle_scope(isolate);
return handle_scope.Escape(
MakeCallback(isolate, recv, symbol, argc, argv, {0, 0})
.FromMaybe(Local<Value>()));
}
Local<Value> MakeCallback(Isolate* isolate,
Local<Object> recv,
Local<Function> callback,
int argc,
Local<Value>* argv) {
EscapableHandleScope handle_scope(isolate);
return handle_scope.Escape(
MakeCallback(isolate, recv, callback, argc, argv, {0, 0})
.FromMaybe(Local<Value>()));
}
bool IsExceptionDecorated(Environment* env, Local<Value> er) {
if (!er.IsEmpty() && er->IsObject()) {
Local<Object> err_obj = er.As<Object>();
auto maybe_value =
err_obj->GetPrivate(env->context(), env->decorated_private_symbol());
Local<Value> decorated;
return maybe_value.ToLocal(&decorated) && decorated->IsTrue();
}
return false;
}
void AppendExceptionLine(Environment* env,
Local<Value> er,
Local<Message> message,
enum ErrorHandlingMode mode) {
if (message.IsEmpty())
return;
HandleScope scope(env->isolate());
Local<Object> err_obj;
if (!er.IsEmpty() && er->IsObject()) {
err_obj = er.As<Object>();
}
// Print (filename):(line number): (message).
ScriptOrigin origin = message->GetScriptOrigin();
node::Utf8Value filename(env->isolate(), message->GetScriptResourceName());
const char* filename_string = *filename;
int linenum = message->GetLineNumber(env->context()).FromJust();
// Print line of source code.
MaybeLocal<String> source_line_maybe = message->GetSourceLine(env->context());
node::Utf8Value sourceline(env->isolate(),
source_line_maybe.ToLocalChecked());
const char* sourceline_string = *sourceline;
if (strstr(sourceline_string, "node-do-not-add-exception-line") != nullptr)
return;
// Because of how node modules work, all scripts are wrapped with a
// "function (module, exports, __filename, ...) {"
// to provide script local variables.
//
// When reporting errors on the first line of a script, this wrapper
// function is leaked to the user. There used to be a hack here to
// truncate off the first 62 characters, but it caused numerous other
// problems when vm.runIn*Context() methods were used for non-module
// code.
//
// If we ever decide to re-instate such a hack, the following steps
// must be taken:
//
// 1. Pass a flag around to say "this code was wrapped"
// 2. Update the stack frame output so that it is also correct.
//
// It would probably be simpler to add a line rather than add some
// number of characters to the first line, since V8 truncates the
// sourceline to 78 characters, and we end up not providing very much
// useful debugging info to the user if we remove 62 characters.
int script_start =
(linenum - origin.ResourceLineOffset()->Value()) == 1 ?
origin.ResourceColumnOffset()->Value() : 0;
int start = message->GetStartColumn(env->context()).FromMaybe(0);
int end = message->GetEndColumn(env->context()).FromMaybe(0);
if (start >= script_start) {
CHECK_GE(end, start);
start -= script_start;
end -= script_start;
}
char arrow[1024];
int max_off = sizeof(arrow) - 2;
int off = snprintf(arrow,
sizeof(arrow),
"%s:%i\n%s\n",
filename_string,
linenum,
sourceline_string);
CHECK_GE(off, 0);
if (off > max_off) {
off = max_off;
}
// Print wavy underline (GetUnderline is deprecated).
for (int i = 0; i < start; i++) {
if (sourceline_string[i] == '\0' || off >= max_off) {
break;
}
CHECK_LT(off, max_off);
arrow[off++] = (sourceline_string[i] == '\t') ? '\t' : ' ';
}
for (int i = start; i < end; i++) {
if (sourceline_string[i] == '\0' || off >= max_off) {
break;
}
CHECK_LT(off, max_off);
arrow[off++] = '^';
}
CHECK_LE(off, max_off);
arrow[off] = '\n';
arrow[off + 1] = '\0';
Local<String> arrow_str = String::NewFromUtf8(env->isolate(), arrow,
NewStringType::kNormal).ToLocalChecked();
const bool can_set_arrow = !arrow_str.IsEmpty() && !err_obj.IsEmpty();
// If allocating arrow_str failed, print it out. There's not much else to do.
// If it's not an error, but something needs to be printed out because
// it's a fatal exception, also print it out from here.
// Otherwise, the arrow property will be attached to the object and handled
// by the caller.
if (!can_set_arrow || (mode == FATAL_ERROR && !err_obj->IsNativeError())) {
if (env->printed_error())
return;
Mutex::ScopedLock lock(process_mutex);
env->set_printed_error(true);
uv_tty_reset_mode();
PrintErrorString("\n%s", arrow);
return;
}
CHECK(err_obj->SetPrivate(
env->context(),
env->arrow_message_private_symbol(),
arrow_str).FromMaybe(false));
}
void ReportException(Environment* env,
Local<Value> er,
Local<Message> message) {
CHECK(!er.IsEmpty());
HandleScope scope(env->isolate());
if (message.IsEmpty())
message = Exception::CreateMessage(env->isolate(), er);
AppendExceptionLine(env, er, message, FATAL_ERROR);
Local<Value> trace_value;
Local<Value> arrow;
const bool decorated = IsExceptionDecorated(env, er);
if (er->IsUndefined() || er->IsNull()) {
trace_value = Undefined(env->isolate());
} else {
Local<Object> err_obj = er->ToObject(env->context()).ToLocalChecked();
trace_value = err_obj->Get(env->stack_string());
arrow =
err_obj->GetPrivate(
env->context(),
env->arrow_message_private_symbol()).ToLocalChecked();
}
node::Utf8Value trace(env->isolate(), trace_value);
// range errors have a trace member set to undefined
if (trace.length() > 0 && !trace_value->IsUndefined()) {
if (arrow.IsEmpty() || !arrow->IsString() || decorated) {
PrintErrorString("%s\n", *trace);
} else {
node::Utf8Value arrow_string(env->isolate(), arrow);
PrintErrorString("%s\n%s\n", *arrow_string, *trace);
}
} else {
// this really only happens for RangeErrors, since they're the only
// kind that won't have all this info in the trace, or when non-Error
// objects are thrown manually.
Local<Value> message;
Local<Value> name;
if (er->IsObject()) {
Local<Object> err_obj = er.As<Object>();
message = err_obj->Get(env->message_string());
name = err_obj->Get(FIXED_ONE_BYTE_STRING(env->isolate(), "name"));
}
if (message.IsEmpty() ||
message->IsUndefined() ||
name.IsEmpty() ||
name->IsUndefined()) {
// Not an error object. Just print as-is.
String::Utf8Value message(env->isolate(), er);
PrintErrorString("%s\n", *message ? *message :
"<toString() threw exception>");
} else {
node::Utf8Value name_string(env->isolate(), name);
node::Utf8Value message_string(env->isolate(), message);
if (arrow.IsEmpty() || !arrow->IsString() || decorated) {
PrintErrorString("%s: %s\n", *name_string, *message_string);
} else {
node::Utf8Value arrow_string(env->isolate(), arrow);
PrintErrorString("%s\n%s: %s\n",
*arrow_string,
*name_string,
*message_string);
}
}
}
fflush(stderr);
#if HAVE_INSPECTOR
env->inspector_agent()->FatalException(er, message);
#endif
}
static void ReportException(Environment* env, const TryCatch& try_catch) {
ReportException(env, try_catch.Exception(), try_catch.Message());
}
// Executes a str within the current v8 context.
static MaybeLocal<Value> ExecuteString(Environment* env,
Local<String> source,
Local<String> filename) {
EscapableHandleScope scope(env->isolate());
TryCatch try_catch(env->isolate());
// try_catch must be nonverbose to disable FatalException() handler,
// we will handle exceptions ourself.
try_catch.SetVerbose(false);
ScriptOrigin origin(filename);
MaybeLocal<Script> script =
Script::Compile(env->context(), source, &origin);
if (script.IsEmpty()) {
ReportException(env, try_catch);
env->Exit(3);
return MaybeLocal<Value>();
}
MaybeLocal<Value> result = script.ToLocalChecked()->Run(env->context());
if (result.IsEmpty()) {
if (try_catch.HasTerminated()) {
env->isolate()->CancelTerminateExecution();
return MaybeLocal<Value>();
}
ReportException(env, try_catch);
env->Exit(4);
return MaybeLocal<Value>();
}
return scope.Escape(result.ToLocalChecked());
}
[[noreturn]] void Abort() {
DumpBacktrace(stderr);
fflush(stderr);
ABORT_NO_BACKTRACE();
}
[[noreturn]] void Assert(const char* const (*args)[4]) {
auto filename = (*args)[0];
auto linenum = (*args)[1];
auto message = (*args)[2];
auto function = (*args)[3];
char name[1024];
GetHumanReadableProcessName(&name);
fprintf(stderr, "%s: %s:%s:%s%s Assertion `%s' failed.\n",
name, filename, linenum, function, *function ? ":" : "", message);
fflush(stderr);
Abort();
}
static 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
}
static void Exit(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
WaitForInspectorDisconnect(env);
v8_platform.StopTracingAgent();
int code = args[0]->Int32Value(env->context()).FromMaybe(0);
env->Exit(code);
}
extern "C" void node_module_register(void* m) {
struct node_module* mp = reinterpret_cast<struct node_module*>(m);
if (mp->nm_flags & NM_F_BUILTIN) {
mp->nm_link = modlist_builtin;
modlist_builtin = mp;
} else if (mp->nm_flags & NM_F_INTERNAL) {
mp->nm_link = modlist_internal;
modlist_internal = mp;
} else if (!node_is_initialized) {
// "Linked" modules are included as part of the node project.
// Like builtins they are registered *before* node::Init runs.
mp->nm_flags = NM_F_LINKED;
mp->nm_link = modlist_linked;
modlist_linked = mp;
} else {
uv_key_set(&thread_local_modpending, mp);
}
}
inline struct node_module* FindModule(struct node_module* list,
const char* name,
int flag) {
struct node_module* mp;
for (mp = list; mp != nullptr; mp = mp->nm_link) {
if (strcmp(mp->nm_modname, name) == 0)
break;
}
CHECK(mp == nullptr || (mp->nm_flags & flag) != 0);
return mp;
}
node_module* get_builtin_module(const char* name) {
return FindModule(modlist_builtin, name, NM_F_BUILTIN);
}
node_module* get_internal_module(const char* name) {
return FindModule(modlist_internal, name, NM_F_INTERNAL);
}
node_module* get_linked_module(const char* name) {
return FindModule(modlist_linked, name, NM_F_LINKED);
}
class DLib {
public:
#ifdef __POSIX__
static const int kDefaultFlags = RTLD_LAZY;
#else
static const int kDefaultFlags = 0;
#endif
inline DLib(const char* filename, int flags)
: filename_(filename), flags_(flags), handle_(nullptr) {}
inline bool Open();
inline void Close();
inline void* GetSymbolAddress(const char* name);
const std::string filename_;
const int flags_;
std::string errmsg_;
void* handle_;
#ifndef __POSIX__
uv_lib_t lib_;
#endif
private:
DISALLOW_COPY_AND_ASSIGN(DLib);
};
#ifdef __POSIX__
bool DLib::Open() {
handle_ = dlopen(filename_.c_str(), flags_);
if (handle_ != nullptr)
return true;
errmsg_ = dlerror();
return false;
}
void DLib::Close() {
if (handle_ == nullptr) return;
dlclose(handle_);
handle_ = nullptr;
}
void* DLib::GetSymbolAddress(const char* name) {
return dlsym(handle_, name);
}
#else // !__POSIX__
bool DLib::Open() {
int ret = uv_dlopen(filename_.c_str(), &lib_);
if (ret == 0) {
handle_ = static_cast<void*>(lib_.handle);
return true;
}
errmsg_ = uv_dlerror(&lib_);
uv_dlclose(&lib_);
return false;
}
void DLib::Close() {
if (handle_ == nullptr) return;
uv_dlclose(&lib_);
handle_ = nullptr;
}
void* DLib::GetSymbolAddress(const char* name) {
void* address;
if (0 == uv_dlsym(&lib_, name, &address)) return address;
return nullptr;
}
#endif // !__POSIX__
using InitializerCallback = void (*)(Local<Object> exports,
Local<Value> module,
Local<Context> context);
inline InitializerCallback GetInitializerCallback(DLib* dlib) {
const char* name = "node_register_module_v" STRINGIFY(NODE_MODULE_VERSION);
return reinterpret_cast<InitializerCallback>(dlib->GetSymbolAddress(name));
}
inline napi_addon_register_func GetNapiInitializerCallback(DLib* dlib) {
const char* name =
STRINGIFY(NAPI_MODULE_INITIALIZER_BASE) STRINGIFY(NAPI_MODULE_VERSION);
return
reinterpret_cast<napi_addon_register_func>(dlib->GetSymbolAddress(name));
}
void InitModpendingOnce() {
CHECK_EQ(0, uv_key_create(&thread_local_modpending));
}
// DLOpen is process.dlopen(module, filename, flags).
// Used to load 'module.node' dynamically shared objects.
//
// FIXME(bnoordhuis) Not multi-context ready. TBD how to resolve the conflict
// when two contexts try to load the same shared object. Maybe have a shadow
// cache that's a plain C list or hash table that's shared across contexts?
static void DLOpen(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
auto context = env->context();
uv_once(&init_modpending_once, InitModpendingOnce);
CHECK_NULL(uv_key_get(&thread_local_modpending));
if (args.Length() < 2) {
env->ThrowError("process.dlopen needs at least 2 arguments.");
return;
}
int32_t flags = DLib::kDefaultFlags;
if (args.Length() > 2 && !args[2]->Int32Value(context).To(&flags)) {
return env->ThrowTypeError("flag argument must be an integer.");
}
Local<Object> module;
Local<Object> exports;
Local<Value> exports_v;
if (!args[0]->ToObject(context).ToLocal(&module) ||
!module->Get(context, env->exports_string()).ToLocal(&exports_v) ||
!exports_v->ToObject(context).ToLocal(&exports)) {
return; // Exception pending.
}
node::Utf8Value filename(env->isolate(), args[1]); // Cast
DLib dlib(*filename, flags);
bool is_opened = dlib.Open();
// Objects containing v14 or later modules will have registered themselves
// on the pending list. Activate all of them now. At present, only one
// module per object is supported.
node_module* const mp = static_cast<node_module*>(
uv_key_get(&thread_local_modpending));
uv_key_set(&thread_local_modpending, nullptr);
if (!is_opened) {
Local<String> errmsg = OneByteString(env->isolate(), dlib.errmsg_.c_str());
dlib.Close();
#ifdef _WIN32
// Windows needs to add the filename into the error message
errmsg = String::Concat(
env->isolate(), errmsg, args[1]->ToString(context).ToLocalChecked());
#endif // _WIN32
env->isolate()->ThrowException(Exception::Error(errmsg));
return;
}
if (mp == nullptr) {
if (auto callback = GetInitializerCallback(&dlib)) {
callback(exports, module, context);
} else if (auto napi_callback = GetNapiInitializerCallback(&dlib)) {
napi_module_register_by_symbol(exports, module, context, napi_callback);
} else {
dlib.Close();
env->ThrowError("Module did not self-register.");
}
return;
}
// -1 is used for N-API modules
if ((mp->nm_version != -1) && (mp->nm_version != NODE_MODULE_VERSION)) {
// Even if the module did self-register, it may have done so with the wrong
// version. We must only give up after having checked to see if it has an
// appropriate initializer callback.
if (auto callback = GetInitializerCallback(&dlib)) {
callback(exports, module, context);
return;
}
char errmsg[1024];
snprintf(errmsg,
sizeof(errmsg),
"The module '%s'"
"\nwas compiled against a different Node.js version using"
"\nNODE_MODULE_VERSION %d. This version of Node.js requires"
"\nNODE_MODULE_VERSION %d. Please try re-compiling or "
"re-installing\nthe module (for instance, using `npm rebuild` "
"or `npm install`).",
*filename, mp->nm_version, NODE_MODULE_VERSION);
// NOTE: `mp` is allocated inside of the shared library's memory, calling
// `dlclose` will deallocate it
dlib.Close();
env->ThrowError(errmsg);
return;
}
if (mp->nm_flags & NM_F_BUILTIN) {
dlib.Close();
env->ThrowError("Built-in module self-registered.");
return;
}
mp->nm_dso_handle = dlib.handle_;
mp->nm_link = modlist_addon;
modlist_addon = mp;
if (mp->nm_context_register_func != nullptr) {
mp->nm_context_register_func(exports, module, context, mp->nm_priv);
} else if (mp->nm_register_func != nullptr) {
mp->nm_register_func(exports, module, mp->nm_priv);
} else {
dlib.Close();
env->ThrowError("Module has no declared entry point.");
return;
}
// Tell coverity that 'handle' should not be freed when we return.
// coverity[leaked_storage]
}
static void OnFatalError(const char* location, const char* message) {
if (location) {
PrintErrorString("FATAL ERROR: %s %s\n", location, message);
} else {
PrintErrorString("FATAL ERROR: %s\n", message);
}
fflush(stderr);
ABORT();
}
[[noreturn]] void FatalError(const char* location, const char* message) {
OnFatalError(location, message);
// to suppress compiler warning
ABORT();
}
FatalTryCatch::~FatalTryCatch() {
if (HasCaught()) {
HandleScope scope(env_->isolate());
ReportException(env_, *this);
exit(7);
}
}
void FatalException(Isolate* isolate,
Local<Value> error,
Local<Message> message) {
HandleScope scope(isolate);
Environment* env = Environment::GetCurrent(isolate);
CHECK_NOT_NULL(env); // TODO(addaleax): Handle nullptr here.
Local<Object> process_object = env->process_object();
Local<String> fatal_exception_string = env->fatal_exception_string();
Local<Value> fatal_exception_function =
process_object->Get(fatal_exception_string);
if (!fatal_exception_function->IsFunction()) {
// Failed before the process._fatalException function was added!
// this is probably pretty bad. Nothing to do but report and exit.
ReportException(env, error, message);
exit(6);
} else {
TryCatch fatal_try_catch(isolate);
// Do not call FatalException when _fatalException handler throws
fatal_try_catch.SetVerbose(false);
// This will return true if the JS layer handled it, false otherwise
Local<Value> caught =
fatal_exception_function.As<Function>()
->Call(env->context(), process_object, 1, &error)
.FromMaybe(Local<Value>());
if (fatal_try_catch.HasTerminated())
return;
if (fatal_try_catch.HasCaught()) {
// The fatal exception function threw, so we must exit
ReportException(env, fatal_try_catch);
exit(7);
} else if (caught.IsEmpty() || caught->IsFalse()) {
ReportException(env, error, message);
// fatal_exception_function call before may have set a new exit code ->
// read it again, otherwise use default for uncaughtException 1
Local<String> exit_code = env->exit_code_string();
Local<Value> code;
if (!process_object->Get(env->context(), exit_code).ToLocal(&code) ||
!code->IsInt32()) {
exit(1);
}
exit(code.As<Int32>()->Value());
}
}
}
void FatalException(Isolate* isolate, const TryCatch& try_catch) {
// If we try to print out a termination exception, we'd just get 'null',
// so just crashing here with that information seems like a better idea,
// and in particular it seems like we should handle terminations at the call
// site for this function rather than by printing them out somewhere.
CHECK(!try_catch.HasTerminated());
HandleScope scope(isolate);
if (!try_catch.IsVerbose()) {
FatalException(isolate, try_catch.Exception(), try_catch.Message());
}
}
static void OnMessage(Local<Message> message, Local<Value> error) {
// The current version of V8 sends messages for errors only
// (thus `error` is always set).
FatalException(Isolate::GetCurrent(), error, message);
}
static Maybe<bool> ProcessEmitWarningGeneric(Environment* env,
const char* warning,
const char* type = nullptr,
const char* code = nullptr) {
HandleScope handle_scope(env->isolate());
Context::Scope context_scope(env->context());
Local<Object> process = env->process_object();
Local<Value> emit_warning;
if (!process->Get(env->context(),
env->emit_warning_string()).ToLocal(&emit_warning)) {
return Nothing<bool>();
}
if (!emit_warning->IsFunction()) return Just(false);
int argc = 0;
Local<Value> args[3]; // warning, type, code
// The caller has to be able to handle a failure anyway, so we might as well
// do proper error checking for string creation.
if (!String::NewFromUtf8(env->isolate(),
warning,
NewStringType::kNormal).ToLocal(&args[argc++])) {
return Nothing<bool>();
}
if (type != nullptr) {
if (!String::NewFromOneByte(env->isolate(),
reinterpret_cast<const uint8_t*>(type),
NewStringType::kNormal)
.ToLocal(&args[argc++])) {
return Nothing<bool>();
}
if (code != nullptr &&
!String::NewFromOneByte(env->isolate(),
reinterpret_cast<const uint8_t*>(code),
NewStringType::kNormal)
.ToLocal(&args[argc++])) {
return Nothing<bool>();
}
}
// MakeCallback() unneeded because emitWarning is internal code, it calls
// process.emit('warning', ...), but does so on the nextTick.
if (emit_warning.As<Function>()->Call(env->context(),
process,
argc,
args).IsEmpty()) {
return Nothing<bool>();
}
return Just(true);
}
// Call process.emitWarning(str), fmt is a snprintf() format string
Maybe<bool> ProcessEmitWarning(Environment* env, const char* fmt, ...) {
char warning[1024];
va_list ap;
va_start(ap, fmt);
vsnprintf(warning, sizeof(warning), fmt, ap);
va_end(ap);
return ProcessEmitWarningGeneric(env, warning);
}
Maybe<bool> ProcessEmitDeprecationWarning(Environment* env,
const char* warning,
const char* deprecation_code) {
return ProcessEmitWarningGeneric(env,
warning,
"DeprecationWarning",
deprecation_code);
}
static Local<Object> InitModule(Environment* env,
node_module* mod,
Local<String> module) {
Local<Object> exports = Object::New(env->isolate());
// Internal bindings don't have a "module" object, only exports.
CHECK_NULL(mod->nm_register_func);
CHECK_NOT_NULL(mod->nm_context_register_func);
Local<Value> unused = Undefined(env->isolate());
mod->nm_context_register_func(exports,
unused,
env->context(),
mod->nm_priv);
return exports;
}
static void ThrowIfNoSuchModule(Environment* env, const char* module_v) {
char errmsg[1024];
snprintf(errmsg,
sizeof(errmsg),
"No such module: %s",
module_v);
env->ThrowError(errmsg);
}
static void GetBinding(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
CHECK(args[0]->IsString());
Local<String> module = args[0].As<String>();
node::Utf8Value module_v(env->isolate(), module);
node_module* mod = get_builtin_module(*module_v);
Local<Object> exports;
if (mod != nullptr) {
exports = InitModule(env, mod, module);
} else {
return ThrowIfNoSuchModule(env, *module_v);
}
args.GetReturnValue().Set(exports);
}
static void GetInternalBinding(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
CHECK(args[0]->IsString());
Local<String> module = args[0].As<String>();
node::Utf8Value module_v(env->isolate(), module);
Local<Object> exports;
node_module* mod = get_internal_module(*module_v);
if (mod != nullptr) {
exports = InitModule(env, mod, module);
} else if (!strcmp(*module_v, "constants")) {
exports = Object::New(env->isolate());
CHECK(exports->SetPrototype(env->context(),
Null(env->isolate())).FromJust());
DefineConstants(env->isolate(), exports);
} else if (!strcmp(*module_v, "natives")) {
exports = Object::New(env->isolate());
DefineJavaScript(env, exports);
} else if (!strcmp(*module_v, "code_cache")) {
// internalBinding('code_cache')
exports = Object::New(env->isolate());
DefineCodeCache(env, exports);
} else if (!strcmp(*module_v, "code_cache_hash")) {
// internalBinding('code_cache_hash')
exports = Object::New(env->isolate());
DefineCodeCacheHash(env, exports);
} else if (!strcmp(*module_v, "natives_hash")) {
// internalBinding('natives_hash')
exports = Object::New(env->isolate());
DefineJavaScriptHash(env, exports);
} else {
return ThrowIfNoSuchModule(env, *module_v);
}
args.GetReturnValue().Set(exports);
}
static void GetLinkedBinding(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
CHECK(args[0]->IsString());
Local<String> module_name = args[0].As<String>();
node::Utf8Value module_name_v(env->isolate(), module_name);
node_module* mod = get_linked_module(*module_name_v);
if (mod == nullptr) {
char errmsg[1024];
snprintf(errmsg,
sizeof(errmsg),
"No such module was linked: %s",
*module_name_v);
return env->ThrowError(errmsg);
}
Local<Object> module = Object::New(env->isolate());
Local<Object> exports = Object::New(env->isolate());
Local<String> exports_prop = String::NewFromUtf8(env->isolate(), "exports",
NewStringType::kNormal).ToLocalChecked();
module->Set(exports_prop, exports);
if (mod->nm_context_register_func != nullptr) {
mod->nm_context_register_func(exports,
module,
env->context(),
mod->nm_priv);
} else if (mod->nm_register_func != nullptr) {
mod->nm_register_func(exports, module, mod->nm_priv);
} else {
return env->ThrowError("Linked module has no declared entry point.");
}
auto effective_exports = module->Get(exports_prop);
args.GetReturnValue().Set(effective_exports);
}
static Local<Object> GetFeatures(Environment* env) {
EscapableHandleScope scope(env->isolate());
Local<Object> obj = Object::New(env->isolate());
#if defined(DEBUG) && DEBUG
Local<Value> debug = True(env->isolate());
#else
Local<Value> debug = False(env->isolate());
#endif // defined(DEBUG) && DEBUG
obj->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "debug"), debug);
obj->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "uv"), True(env->isolate()));
// TODO(bnoordhuis) ping libuv
obj->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "ipv6"), True(env->isolate()));
#ifdef HAVE_OPENSSL
Local<Boolean> have_openssl = True(env->isolate());
#else
Local<Boolean> have_openssl = False(env->isolate());
#endif
obj->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "tls_alpn"), have_openssl);
obj->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "tls_sni"), have_openssl);
obj->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "tls_ocsp"), have_openssl);
obj->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "tls"), have_openssl);
return scope.Escape(obj);
}
static void DebugProcess(const FunctionCallbackInfo<Value>& args);
static void DebugEnd(const FunctionCallbackInfo<Value>& args);
namespace {
#define READONLY_PROPERTY(obj, str, var) \
do { \
obj->DefineOwnProperty(env->context(), \
OneByteString(env->isolate(), str), \
var, \
ReadOnly).FromJust(); \
} while (0)
#define READONLY_DONT_ENUM_PROPERTY(obj, str, var) \
do { \
obj->DefineOwnProperty(env->context(), \
OneByteString(env->isolate(), str), \
var, \
static_cast<PropertyAttribute>(ReadOnly|DontEnum)) \
.FromJust(); \
} while (0)
} // anonymous namespace
void SetupProcessObject(Environment* env,
const std::vector<std::string>& args,
const std::vector<std::string>& exec_args) {
HandleScope scope(env->isolate());
Local<Object> process = env->process_object();
auto title_string = FIXED_ONE_BYTE_STRING(env->isolate(), "title");
CHECK(process->SetAccessor(
env->context(),
title_string,
ProcessTitleGetter,
env->is_main_thread() ? ProcessTitleSetter : nullptr,
env->as_external(),
DEFAULT,
None,
SideEffectType::kHasNoSideEffect).FromJust());
// process.version
READONLY_PROPERTY(process,
"version",
FIXED_ONE_BYTE_STRING(env->isolate(), NODE_VERSION));
// process.versions
Local<Object> versions = Object::New(env->isolate());
READONLY_PROPERTY(process, "versions", versions);
const char http_parser_version[] = NODE_STRINGIFY(HTTP_PARSER_VERSION_MAJOR)
"."
NODE_STRINGIFY(HTTP_PARSER_VERSION_MINOR)
"."
NODE_STRINGIFY(HTTP_PARSER_VERSION_PATCH);
READONLY_PROPERTY(versions,
"http_parser",
FIXED_ONE_BYTE_STRING(env->isolate(), http_parser_version));
// +1 to get rid of the leading 'v'
READONLY_PROPERTY(versions,
"node",
OneByteString(env->isolate(), NODE_VERSION + 1));
READONLY_PROPERTY(versions,
"v8",
OneByteString(env->isolate(), V8::GetVersion()));
READONLY_PROPERTY(versions,
"uv",
OneByteString(env->isolate(), uv_version_string()));
READONLY_PROPERTY(versions,
"zlib",
FIXED_ONE_BYTE_STRING(env->isolate(), ZLIB_VERSION));
READONLY_PROPERTY(versions,
"ares",
FIXED_ONE_BYTE_STRING(env->isolate(), ARES_VERSION_STR));
const char node_modules_version[] = NODE_STRINGIFY(NODE_MODULE_VERSION);
READONLY_PROPERTY(
versions,
"modules",
FIXED_ONE_BYTE_STRING(env->isolate(), node_modules_version));
READONLY_PROPERTY(versions,
"nghttp2",
FIXED_ONE_BYTE_STRING(env->isolate(), NGHTTP2_VERSION));
const char node_napi_version[] = NODE_STRINGIFY(NAPI_VERSION);
READONLY_PROPERTY(
versions,
"napi",
FIXED_ONE_BYTE_STRING(env->isolate(), node_napi_version));
#if HAVE_OPENSSL
READONLY_PROPERTY(
versions,
"openssl",
OneByteString(env->isolate(), crypto::GetOpenSSLVersion().c_str()));
#endif
// process.arch
READONLY_PROPERTY(process, "arch", OneByteString(env->isolate(), NODE_ARCH));
// process.platform
READONLY_PROPERTY(process,
"platform",
OneByteString(env->isolate(), NODE_PLATFORM));
// process.release
Local<Object> release = Object::New(env->isolate());
READONLY_PROPERTY(process, "release", release);
READONLY_PROPERTY(release, "name",
OneByteString(env->isolate(), NODE_RELEASE));
#if NODE_VERSION_IS_LTS
READONLY_PROPERTY(release, "lts",
OneByteString(env->isolate(), NODE_VERSION_LTS_CODENAME));
#endif
// if this is a release build and no explicit base has been set
// substitute the standard release download URL
#ifndef NODE_RELEASE_URLBASE
# if NODE_VERSION_IS_RELEASE
# define NODE_RELEASE_URLBASE "https://nodejs.org/download/release/"
# endif
#endif
#if defined(NODE_RELEASE_URLBASE)
# define NODE_RELEASE_URLPFX NODE_RELEASE_URLBASE "v" NODE_VERSION_STRING "/"
# define NODE_RELEASE_URLFPFX NODE_RELEASE_URLPFX "node-v" NODE_VERSION_STRING
READONLY_PROPERTY(release,
"sourceUrl",
OneByteString(env->isolate(),
NODE_RELEASE_URLFPFX ".tar.gz"));
READONLY_PROPERTY(release,
"headersUrl",
OneByteString(env->isolate(),
NODE_RELEASE_URLFPFX "-headers.tar.gz"));
# ifdef _WIN32
READONLY_PROPERTY(release,
"libUrl",
OneByteString(env->isolate(),
strcmp(NODE_ARCH, "ia32") ? NODE_RELEASE_URLPFX "win-"
NODE_ARCH "/node.lib"
: NODE_RELEASE_URLPFX
"win-x86/node.lib"));
# endif
#endif
// process.argv
Local<Array> arguments = Array::New(env->isolate(), args.size());
for (size_t i = 0; i < args.size(); ++i) {
arguments->Set(env->context(), i,
String::NewFromUtf8(env->isolate(), args[i].c_str(),
NewStringType::kNormal).ToLocalChecked())
.FromJust();
}
process->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "argv"), arguments);
// process.execArgv
Local<Array> exec_arguments = Array::New(env->isolate(), exec_args.size());
for (size_t i = 0; i < exec_args.size(); ++i) {
exec_arguments->Set(env->context(), i,
String::NewFromUtf8(env->isolate(), exec_args[i].c_str(),
NewStringType::kNormal).ToLocalChecked())
.FromJust();
}
process->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "execArgv"),
exec_arguments);
// create process.env
Local<ObjectTemplate> process_env_template =
ObjectTemplate::New(env->isolate());
process_env_template->SetHandler(NamedPropertyHandlerConfiguration(
EnvGetter,
EnvSetter,
EnvQuery,
EnvDeleter,
EnvEnumerator,
env->as_external()));
Local<Object> process_env =
process_env_template->NewInstance(env->context()).ToLocalChecked();
process->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "env"), process_env);
READONLY_PROPERTY(process, "pid",
Integer::New(env->isolate(), uv_os_getpid()));
READONLY_PROPERTY(process, "features", GetFeatures(env));
CHECK(process->SetAccessor(env->context(),
FIXED_ONE_BYTE_STRING(env->isolate(), "ppid"),
GetParentProcessId).FromJust());
// -e, --eval
if (env->options()->has_eval_string) {
READONLY_PROPERTY(process,
"_eval",
String::NewFromUtf8(
env->isolate(),
env->options()->eval_string.c_str(),
NewStringType::kNormal).ToLocalChecked());
}
// -p, --print
if (env->options()->print_eval) {
READONLY_PROPERTY(process, "_print_eval", True(env->isolate()));
}
// -c, --check
if (env->options()->syntax_check_only) {
READONLY_PROPERTY(process, "_syntax_check_only", True(env->isolate()));
}
// -i, --interactive
if (env->options()->force_repl) {
READONLY_PROPERTY(process, "_forceRepl", True(env->isolate()));
}
// -r, --require
std::vector<std::string> preload_modules =
std::move(env->options()->preload_modules);
if (!preload_modules.empty()) {
Local<Array> array = Array::New(env->isolate());
for (unsigned int i = 0; i < preload_modules.size(); ++i) {
Local<String> module = String::NewFromUtf8(env->isolate(),
preload_modules[i].c_str(),
NewStringType::kNormal)
.ToLocalChecked();
array->Set(i, module);
}
READONLY_PROPERTY(process,
"_preload_modules",
array);
preload_modules.clear();
}
// --no-deprecation
if (env->options()->no_deprecation) {
READONLY_PROPERTY(process, "noDeprecation", True(env->isolate()));
}
// --no-warnings
if (env->options()->no_warnings) {
READONLY_PROPERTY(process, "noProcessWarnings", True(env->isolate()));
}
// --trace-warnings
if (env->options()->trace_warnings) {
READONLY_PROPERTY(process, "traceProcessWarnings", True(env->isolate()));
}
// --throw-deprecation
if (env->options()->throw_deprecation) {
READONLY_PROPERTY(process, "throwDeprecation", True(env->isolate()));
}
#ifdef NODE_NO_BROWSER_GLOBALS
// configure --no-browser-globals
READONLY_PROPERTY(process, "_noBrowserGlobals", True(env->isolate()));
#endif // NODE_NO_BROWSER_GLOBALS
// --prof-process
if (env->options()->prof_process) {
READONLY_PROPERTY(process, "profProcess", True(env->isolate()));
}
// --trace-deprecation
if (env->options()->trace_deprecation) {
READONLY_PROPERTY(process, "traceDeprecation", True(env->isolate()));
}
// TODO(refack): move the following 4 to `node_config`
// --inspect-brk
if (env->options()->debug_options->wait_for_connect()) {
READONLY_DONT_ENUM_PROPERTY(process,
"_breakFirstLine", True(env->isolate()));
}
if (env->options()->debug_options->break_node_first_line) {
READONLY_DONT_ENUM_PROPERTY(process,
"_breakNodeFirstLine", True(env->isolate()));
}
// --inspect --debug-brk
if (env->options()->debug_options->deprecated_invocation()) {
READONLY_DONT_ENUM_PROPERTY(process,
"_deprecatedDebugBrk", True(env->isolate()));
}
// --debug or, --debug-brk without --inspect
if (env->options()->debug_options->invalid_invocation()) {
READONLY_DONT_ENUM_PROPERTY(process,
"_invalidDebug", True(env->isolate()));
}
// --security-revert flags
#define V(code, _, __) \
do { \
if (IsReverted(SECURITY_REVERT_ ## code)) { \
READONLY_PROPERTY(process, "REVERT_" #code, True(env->isolate())); \
} \
} while (0);
SECURITY_REVERSIONS(V)
#undef V
size_t exec_path_len = 2 * PATH_MAX;
char* exec_path = new char[exec_path_len];
Local<String> exec_path_value;
if (uv_exepath(exec_path, &exec_path_len) == 0) {
exec_path_value = String::NewFromUtf8(env->isolate(),
exec_path,
NewStringType::kInternalized,
exec_path_len).ToLocalChecked();
} else {
exec_path_value = String::NewFromUtf8(env->isolate(), args[0].c_str(),
NewStringType::kInternalized).ToLocalChecked();
}
process->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "execPath"),
exec_path_value);
delete[] exec_path;
auto debug_port_string = FIXED_ONE_BYTE_STRING(env->isolate(), "debugPort");
CHECK(process->SetAccessor(env->context(),
debug_port_string,
DebugPortGetter,
env->is_main_thread() ? DebugPortSetter : nullptr,
env->as_external()).FromJust());
// define various internal methods
if (env->is_main_thread()) {
env->SetMethod(process, "_debugProcess", DebugProcess);
env->SetMethod(process, "_debugEnd", DebugEnd);
env->SetMethod(process,
"_startProfilerIdleNotifier",
StartProfilerIdleNotifier);
env->SetMethod(process,
"_stopProfilerIdleNotifier",
StopProfilerIdleNotifier);
env->SetMethod(process, "abort", Abort);
env->SetMethod(process, "chdir", Chdir);
env->SetMethod(process, "umask", Umask);
}
env->SetMethod(process, "_getActiveRequests", GetActiveRequests);
env->SetMethod(process, "_getActiveHandles", GetActiveHandles);
env->SetMethod(process, "_kill", Kill);
env->SetMethodNoSideEffect(process, "cwd", Cwd);
env->SetMethod(process, "dlopen", DLOpen);
env->SetMethod(process, "reallyExit", Exit);
env->SetMethodNoSideEffect(process, "uptime", Uptime);
#if defined(__POSIX__) && !defined(__ANDROID__) && !defined(__CloudABI__)
env->SetMethodNoSideEffect(process, "getuid", GetUid);
env->SetMethodNoSideEffect(process, "geteuid", GetEUid);
env->SetMethodNoSideEffect(process, "getgid", GetGid);
env->SetMethodNoSideEffect(process, "getegid", GetEGid);
env->SetMethodNoSideEffect(process, "getgroups", GetGroups);
#endif // __POSIX__ && !defined(__ANDROID__) && !defined(__CloudABI__)
}
#undef READONLY_PROPERTY
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<Function> GetBootstrapper(
Environment* env,
Local<String> source,
Local<String> script_name) {
EscapableHandleScope scope(env->isolate());
TryCatch try_catch(env->isolate());
// Disable verbose mode to stop FatalException() handler from trying
// to handle the exception. Errors this early in the start-up phase
// are not safe to ignore.
try_catch.SetVerbose(false);
// Execute the bootstrapper javascript file
MaybeLocal<Value> bootstrapper_v = ExecuteString(env, source, script_name);
if (bootstrapper_v.IsEmpty()) // This happens when execution was interrupted.
return MaybeLocal<Function>();
if (try_catch.HasCaught()) {
ReportException(env, try_catch);
exit(10);
}
CHECK(bootstrapper_v.ToLocalChecked()->IsFunction());
return scope.Escape(bootstrapper_v.ToLocalChecked().As<Function>());
}
static bool ExecuteBootstrapper(Environment* env, Local<Function> bootstrapper,
int argc, Local<Value> argv[],
Local<Value>* out) {
bool ret = bootstrapper->Call(
env->context(), Null(env->isolate()), argc, argv).ToLocal(out);
// 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 (!ret) {
env->async_hooks()->clear_async_id_stack();
}
return ret;
}
void LoadEnvironment(Environment* env) {
HandleScope handle_scope(env->isolate());
TryCatch try_catch(env->isolate());
// Disable verbose mode to stop FatalException() handler from trying
// to handle the exception. Errors this early in the start-up phase
// are not safe to ignore.
try_catch.SetVerbose(false);
// The bootstrapper scripts are lib/internal/bootstrap/loaders.js and
// lib/internal/bootstrap/node.js, each included as a static C string
// defined in node_javascript.h, generated in node_javascript.cc by
// node_js2c.
Local<String> loaders_name =
FIXED_ONE_BYTE_STRING(env->isolate(), "internal/bootstrap/loaders.js");
MaybeLocal<Function> loaders_bootstrapper =
GetBootstrapper(env, LoadersBootstrapperSource(env), loaders_name);
Local<String> node_name =
FIXED_ONE_BYTE_STRING(env->isolate(), "internal/bootstrap/node.js");
MaybeLocal<Function> node_bootstrapper =
GetBootstrapper(env, NodeBootstrapperSource(env), node_name);
if (loaders_bootstrapper.IsEmpty() || node_bootstrapper.IsEmpty()) {
// Execution was interrupted.
return;
}
// Add a reference to the global object
Local<Object> global = env->context()->Global();
#if defined HAVE_DTRACE || defined HAVE_ETW
InitDTrace(env, global);
#endif
// Enable handling of uncaught exceptions
// (FatalException(), break on uncaught exception in debugger)
//
// This is not strictly necessary since it's almost impossible
// to attach the debugger fast enough to break on exception
// thrown during process startup.
try_catch.SetVerbose(true);
env->SetMethod(env->process_object(), "_rawDebug", RawDebug);
// Expose the global object as a property on itself
// (Allows you to set stuff on `global` from anywhere in JavaScript.)
global->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "global"), global);
// Create binding loaders
Local<Function> get_binding_fn =
env->NewFunctionTemplate(GetBinding)->GetFunction(env->context())
.ToLocalChecked();
Local<Function> get_linked_binding_fn =
env->NewFunctionTemplate(GetLinkedBinding)->GetFunction(env->context())
.ToLocalChecked();
Local<Function> get_internal_binding_fn =
env->NewFunctionTemplate(GetInternalBinding)->GetFunction(env->context())
.ToLocalChecked();
Local<Value> loaders_bootstrapper_args[] = {
env->process_object(),
get_binding_fn,
get_linked_binding_fn,
get_internal_binding_fn,
Boolean::New(env->isolate(),
env->options()->debug_options->break_node_first_line)
};
// Bootstrap internal loaders
Local<Value> bootstrapped_loaders;
if (!ExecuteBootstrapper(env, loaders_bootstrapper.ToLocalChecked(),
arraysize(loaders_bootstrapper_args),
loaders_bootstrapper_args,
&bootstrapped_loaders)) {
return;
}
// Bootstrap Node.js
Local<Object> bootstrapper = Object::New(env->isolate());
SetupBootstrapObject(env, bootstrapper);
Local<Value> bootstrapped_node;
Local<Value> node_bootstrapper_args[] = {
env->process_object(),
bootstrapper,
bootstrapped_loaders
};
if (!ExecuteBootstrapper(env, node_bootstrapper.ToLocalChecked(),
arraysize(node_bootstrapper_args),
node_bootstrapper_args,
&bootstrapped_node)) {
return;
}
}
static void StartInspector(Environment* env, const char* path,
std::shared_ptr<DebugOptions> debug_options) {
#if HAVE_INSPECTOR
CHECK(!env->inspector_agent()->IsListening());
v8_platform.StartInspector(env, path, debug_options);
#endif // HAVE_INSPECTOR
}
#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);
}
void DebugProcess(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
if (args.Length() != 1) {
return env->ThrowError("Invalid number of arguments.");
}
CHECK(args[0]->IsNumber());
pid_t pid = args[0].As<Integer>()->Value();
int r = kill(pid, SIGUSR1);
if (r != 0) {
return env->ThrowErrnoException(errno, "kill");
}
}
#endif // __POSIX__
#ifdef _WIN32
static int GetDebugSignalHandlerMappingName(DWORD pid, wchar_t* buf,
size_t buf_len) {
return _snwprintf(buf, buf_len, L"node-debug-handler-%u", pid);
}
static void DebugProcess(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
Isolate* isolate = args.GetIsolate();
if (args.Length() != 1) {
env->ThrowError("Invalid number of arguments.");
return;
}
HANDLE process = nullptr;
HANDLE thread = nullptr;
HANDLE mapping = nullptr;
wchar_t mapping_name[32];
LPTHREAD_START_ROUTINE* handler = nullptr;
DWORD pid = 0;
OnScopeLeave cleanup([&]() {
if (process != nullptr)
CloseHandle(process);
if (thread != nullptr)
CloseHandle(thread);
if (handler != nullptr)
UnmapViewOfFile(handler);
if (mapping != nullptr)
CloseHandle(mapping);
});
CHECK(args[0]->IsNumber());
pid = args[0].As<Integer>()->Value();
process = OpenProcess(PROCESS_CREATE_THREAD | PROCESS_QUERY_INFORMATION |
PROCESS_VM_OPERATION | PROCESS_VM_WRITE |
PROCESS_VM_READ,
FALSE,
pid);
if (process == nullptr) {
isolate->ThrowException(
WinapiErrnoException(isolate, GetLastError(), "OpenProcess"));
return;
}
if (GetDebugSignalHandlerMappingName(pid,
mapping_name,
arraysize(mapping_name)) < 0) {
env->ThrowErrnoException(errno, "sprintf");
return;
}
mapping = OpenFileMappingW(FILE_MAP_READ, FALSE, mapping_name);
if (mapping == nullptr) {
isolate->ThrowException(WinapiErrnoException(isolate,
GetLastError(),
"OpenFileMappingW"));
return;
}
handler = reinterpret_cast<LPTHREAD_START_ROUTINE*>(
MapViewOfFile(mapping,
FILE_MAP_READ,
0,
0,
sizeof *handler));
if (handler == nullptr || *handler == nullptr) {
isolate->ThrowException(
WinapiErrnoException(isolate, GetLastError(), "MapViewOfFile"));
return;
}
thread = CreateRemoteThread(process,
nullptr,
0,
*handler,
nullptr,
0,
nullptr);
if (thread == nullptr) {
isolate->ThrowException(WinapiErrnoException(isolate,
GetLastError(),
"CreateRemoteThread"));
return;
}
// Wait for the thread to terminate
if (WaitForSingleObject(thread, INFINITE) != WAIT_OBJECT_0) {
isolate->ThrowException(WinapiErrnoException(isolate,
GetLastError(),
"WaitForSingleObject"));
return;
}
}
#endif // _WIN32
static void DebugEnd(const FunctionCallbackInfo<Value>& args) {
#if HAVE_INSPECTOR
Environment* env = Environment::GetCurrent(args);
if (env->inspector_agent()->IsListening()) {
env->inspector_agent()->Stop();
}
#endif
}
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
}
void ProcessArgv(std::vector<std::string>* args,
std::vector<std::string>* exec_args,
bool is_env) {
// Parse a few arguments which are specific to Node.
std::vector<std::string> v8_args;
std::vector<std::string> errors{};
{
// TODO(addaleax): The mutex here should ideally be held during the
// entire function, but that doesn't play well with the exit() calls below.
Mutex::ScopedLock lock(per_process_opts_mutex);
options_parser::PerProcessOptionsParser::instance.Parse(
args,
exec_args,
&v8_args,
per_process_opts.get(),
is_env ? kAllowedInEnvironment : kDisallowedInEnvironment,
&errors);
}
if (!errors.empty()) {
for (auto const& error : errors) {
fprintf(stderr, "%s: %s\n", args->at(0).c_str(), error.c_str());
}
exit(9);
}
if (per_process_opts->print_version) {
printf("%s\n", NODE_VERSION);
exit(0);
}
if (per_process_opts->print_v8_help) {
V8::SetFlagsFromString("--help", 6);
exit(0);
}
for (const std::string& cve : per_process_opts->security_reverts)
Revert(cve.c_str());
auto env_opts = per_process_opts->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()) {
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 (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++) {
fprintf(stderr, "%s: bad option: %s\n",
args->at(0).c_str(), v8_args_as_char_ptr[i]);
}
if (v8_args_as_char_ptr.size() > 1) {
exit(9);
}
}
void Init(std::vector<std::string>* argv,
std::vector<std::string>* exec_argv) {
// Initialize prog_start_time to get relative uptime.
prog_start_time = static_cast<double>(uv_now(uv_default_loop()));
// Register built-in modules
RegisterBuiltinModules();
// Make inherited handles noninheritable.
uv_disable_stdio_inheritance();
#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_opts->per_isolate->per_env;
{
std::string text;
default_env_options->pending_deprecation =
SafeGetenv("NODE_PENDING_DEPRECATION", &text) && text[0] == '1';
}
// Allow for environment set preserving symlinks.
{
std::string text;
default_env_options->preserve_symlinks =
SafeGetenv("NODE_PRESERVE_SYMLINKS", &text) && text[0] == '1';
}
{
std::string text;
default_env_options->preserve_symlinks_main =
SafeGetenv("NODE_PRESERVE_SYMLINKS_MAIN", &text) && text[0] == '1';
}
if (default_env_options->redirect_warnings.empty()) {
SafeGetenv("NODE_REDIRECT_WARNINGS",
&default_env_options->redirect_warnings);
}
#if HAVE_OPENSSL
std::string* openssl_config = &per_process_opts->openssl_config;
if (openssl_config->empty()) {
SafeGetenv("OPENSSL_CONF", openssl_config);
}
#endif
#if !defined(NODE_WITHOUT_NODE_OPTIONS)
std::string node_options;
if (SafeGetenv("NODE_OPTIONS", &node_options)) {
std::vector<std::string> env_argv;
// [0] is expected to be the program name, fill it in from the real argv.
env_argv.push_back(argv->at(0));
// Split NODE_OPTIONS at each ' ' character.
std::string::size_type index = std::string::npos;
do {
std::string::size_type prev_index = index;
index = node_options.find(' ', index + 1);
if (index - prev_index == 1) continue;
const std::string option = node_options.substr(
prev_index + 1, index - prev_index - 1);
if (!option.empty())
env_argv.emplace_back(std::move(option));
} while (index != std::string::npos);
ProcessArgv(&env_argv, nullptr, true);
}
#endif
ProcessArgv(argv, exec_argv, false);
// Set the process.title immediately after processing argv if --title is set.
if (!per_process_opts->title.empty())
uv_set_process_title(per_process_opts->title.c_str());
#if defined(NODE_HAVE_I18N_SUPPORT)
// If the parameter isn't given, use the env variable.
if (per_process_opts->icu_data_dir.empty())
SafeGetenv("NODE_ICU_DATA", &per_process_opts->icu_data_dir);
// Initialize ICU.
// If icu_data_dir is empty here, it will load the 'minimal' data.
if (!i18n::InitializeICUDirectory(per_process_opts->icu_data_dir)) {
fprintf(stderr,
"%s: could not initialize ICU "
"(check NODE_ICU_DATA or --icu-data-dir parameters)\n",
argv->at(0).c_str());
exit(9);
}
#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;
}
// 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_;
Init(&argv_, &exec_argv_);
*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 RunAtExit(Environment* env) {
env->RunAtExitCallbacks();
}
uv_loop_t* GetCurrentEventLoop(Isolate* isolate) {
HandleScope handle_scope(isolate);
Local<Context> context = isolate->GetCurrentContext();
if (context.IsEmpty())
return nullptr;
Environment* env = Environment::GetCurrent(context);
if (env == nullptr)
return nullptr;
return env->event_loop();
}
void AtExit(void (*cb)(void* arg), void* arg) {
auto env = Environment::GetThreadLocalEnv();
AtExit(env, cb, arg);
}
void AtExit(Environment* env, void (*cb)(void* arg), void* arg) {
CHECK_NOT_NULL(env);
env->AtExit(cb, arg);
}
void RunBeforeExit(Environment* env) {
env->RunBeforeExitCallbacks();
if (!uv_loop_alive(env->event_loop()))
EmitBeforeExit(env);
}
void EmitBeforeExit(Environment* env) {
HandleScope handle_scope(env->isolate());
Context::Scope context_scope(env->context());
Local<Object> process_object = env->process_object();
Local<String> exit_code = env->exit_code_string();
Local<Value> args[] = {
FIXED_ONE_BYTE_STRING(env->isolate(), "beforeExit"),
process_object->Get(env->context(), exit_code).ToLocalChecked()
->ToInteger(env->context()).ToLocalChecked()
};
MakeCallback(env->isolate(),
process_object, "emit", arraysize(args), args,
{0, 0}).ToLocalChecked();
}
int EmitExit(Environment* env) {
// process.emit('exit')
HandleScope handle_scope(env->isolate());
Context::Scope context_scope(env->context());
Local<Object> process_object = env->process_object();
process_object->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "_exiting"),
True(env->isolate()));
Local<String> exit_code = env->exit_code_string();
int code = process_object->Get(env->context(), exit_code).ToLocalChecked()
->Int32Value(env->context()).ToChecked();
Local<Value> args[] = {
FIXED_ONE_BYTE_STRING(env->isolate(), "exit"),
Integer::New(env->isolate(), code)
};
MakeCallback(env->isolate(),
process_object, "emit", arraysize(args), args,
{0, 0}).ToLocalChecked();
// Reload exit code, it may be changed by `emit('exit')`
return process_object->Get(env->context(), exit_code).ToLocalChecked()
->Int32Value(env->context()).ToChecked();
}
ArrayBufferAllocator* CreateArrayBufferAllocator() {
return new ArrayBufferAllocator();
}
void FreeArrayBufferAllocator(ArrayBufferAllocator* allocator) {
delete allocator;
}
IsolateData* CreateIsolateData(
Isolate* isolate,
uv_loop_t* loop,
MultiIsolatePlatform* platform,
ArrayBufferAllocator* allocator) {
return new IsolateData(
isolate,
loop,
platform,
allocator != nullptr ? allocator->zero_fill_field() : nullptr);
}
void FreeIsolateData(IsolateData* isolate_data) {
delete isolate_data;
}
Environment* CreateEnvironment(IsolateData* isolate_data,
Local<Context> context,
int argc,
const char* const* argv,
int exec_argc,
const char* const* exec_argv) {
Isolate* isolate = context->GetIsolate();
HandleScope handle_scope(isolate);
Context::Scope context_scope(context);
// TODO(addaleax): This is a much better place for parsing per-Environment
// options than the global parse call.
std::vector<std::string> args(argv, argv + argc);
std::vector<std::string> exec_args(exec_argv, exec_argv + exec_argc);
Environment* env = new Environment(isolate_data, context,
v8_platform.GetTracingAgentWriter());
env->Start(args, exec_args, v8_is_profiling);
return env;
}
void FreeEnvironment(Environment* env) {
env->RunCleanup();
delete env;
}
Environment* GetCurrentEnvironment(Local<Context> context) {
return Environment::GetCurrent(context);
}
MultiIsolatePlatform* GetMainThreadMultiIsolatePlatform() {
return v8_platform.Platform();
}
MultiIsolatePlatform* CreatePlatform(
int thread_pool_size,
node::tracing::TracingController* tracing_controller) {
return new NodePlatform(thread_pool_size, tracing_controller);
}
MultiIsolatePlatform* InitializeV8Platform(int thread_pool_size) {
v8_platform.Initialize(thread_pool_size);
return v8_platform.Platform();
}
void FreePlatform(MultiIsolatePlatform* platform) {
delete platform;
}
Local<Context> NewContext(Isolate* isolate,
Local<ObjectTemplate> object_template) {
auto context = Context::New(isolate, nullptr, object_template);
if (context.IsEmpty()) return context;
HandleScope handle_scope(isolate);
context->SetEmbedderData(
ContextEmbedderIndex::kAllowWasmCodeGeneration, True(isolate));
{
// Run lib/internal/per_context.js
Context::Scope context_scope(context);
Local<String> per_context = NodePerContextSource(isolate);
ScriptCompiler::Source per_context_src(per_context, nullptr);
Local<Script> s = ScriptCompiler::Compile(
context,
&per_context_src).ToLocalChecked();
s->Run(context).ToLocalChecked();
}
return context;
}
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, v8_platform.GetTracingAgentWriter());
env.Start(args, exec_args, v8_is_profiling);
const char* path = args.size() > 1 ? args[1].c_str() : nullptr;
StartInspector(&env, path, env.options()->debug_options);
if (env.options()->debug_options->inspector_enabled &&
!v8_platform.InspectorStarted(&env)) {
return 12; // Signal internal error.
}
{
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);
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);
v8_platform.DrainVMTasks(isolate);
v8_platform.CancelVMTasks(isolate);
#if defined(LEAK_SANITIZER)
__lsan_do_leak_check();
#endif
return exit_code;
}
bool AllowWasmCodeGenerationCallback(
Local<Context> context, Local<String>) {
Local<Value> wasm_code_gen =
context->GetEmbedderData(ContextEmbedderIndex::kAllowWasmCodeGeneration);
return wasm_code_gen->IsUndefined() || wasm_code_gen->IsTrue();
}
Isolate* NewIsolate(ArrayBufferAllocator* allocator, uv_loop_t* event_loop) {
Isolate::CreateParams params;
params.array_buffer_allocator = allocator;
#ifdef NODE_ENABLE_VTUNE_PROFILING
params.code_event_handler = vTune::GetVtuneCodeEventHandler();
#endif
Isolate* isolate = Isolate::Allocate();
if (isolate == nullptr)
return nullptr;
// Register the isolate on the platform before the isolate gets initialized,
// so that the isolate can access the platform during initialization.
v8_platform.Platform()->RegisterIsolate(isolate, event_loop);
Isolate::Initialize(isolate, params);
isolate->AddMessageListener(OnMessage);
isolate->SetAbortOnUncaughtExceptionCallback(ShouldAbortOnUncaughtException);
isolate->SetMicrotasksPolicy(MicrotasksPolicy::kExplicit);
isolate->SetFatalErrorHandler(OnFatalError);
isolate->SetAllowWasmCodeGenerationCallback(AllowWasmCodeGenerationCallback);
return isolate;
}
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.
{
Mutex::ScopedLock scoped_lock(node_isolate_mutex);
CHECK_NULL(node_isolate);
node_isolate = isolate;
}
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,
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);
}
{
Mutex::ScopedLock scoped_lock(node_isolate_mutex);
CHECK_EQ(node_isolate, isolate);
node_isolate = nullptr;
}
isolate->Dispose();
v8_platform.Platform()->UnregisterIsolate(isolate);
return exit_code;
}
int Start(int argc, char** argv) {
atexit([] () { uv_tty_reset_mode(); });
PlatformInit();
performance::performance_node_start = PERFORMANCE_NOW();
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;
// This needs to run *before* V8::Initialize().
Init(&args, &exec_args);
#if HAVE_OPENSSL
{
std::string extra_ca_certs;
if (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_opts->v8_thread_pool_size);
V8::Initialize();
performance::performance_v8_start = PERFORMANCE_NOW();
v8_initialized = true;
const int exit_code =
Start(uv_default_loop(), args, exec_args);
v8_platform.StopTracingAgent();
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.
v8_platform.Dispose();
return exit_code;
}
// Call built-in modules' _register_<module name> function to
// do module registration explicitly.
void RegisterBuiltinModules() {
#define V(modname) _register_##modname();
NODE_BUILTIN_MODULES(V)
#undef V
}
} // namespace node
#if !HAVE_INSPECTOR
void Initialize() {}
NODE_BUILTIN_MODULE_CONTEXT_AWARE(inspector, Initialize)
#endif // !HAVE_INSPECTOR