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// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
#include "node_buffer.h"
#include "node_constants.h"
#include "node_javascript.h"
#include "node_platform.h"
#include "node_version.h"
#include "node_internals.h"
#include "node_revert.h"
#include "node_debug_options.h"
#include "node_perf.h"
#include "node_context_data.h"
#if defined HAVE_PERFCTR
#include "node_counters.h"
#endif
#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 "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
#include <errno.h>
#include <fcntl.h> // _O_RDWR
#include <limits.h> // PATH_MAX
#include <locale.h>
#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 <termios.h> // tcgetattr, tcsetattr
#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
#ifdef __APPLE__
#include <crt_externs.h>
#define environ (*_NSGetEnviron())
#elif !defined(_MSC_VER)
extern char **environ;
#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 v8::Array;
using v8::ArrayBuffer;
using v8::Boolean;
using v8::Context;
using v8::EscapableHandleScope;
using v8::Exception;
using v8::Float64Array;
using v8::Function;
using v8::FunctionCallbackInfo;
using v8::HandleScope;
using v8::HeapStatistics;
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::Name;
using v8::NamedPropertyHandlerConfiguration;
using v8::Nothing;
using v8::Null;
using v8::Number;
using v8::Object;
using v8::ObjectTemplate;
using v8::Promise;
using v8::PropertyCallbackInfo;
using v8::ScriptOrigin;
using v8::SealHandleScope;
using v8::String;
using v8::TryCatch;
using v8::Uint32;
using v8::Uint32Array;
using v8::Undefined;
using v8::V8;
using v8::Value;
static Mutex process_mutex;
static Mutex environ_mutex;
// Safe to call more than once and from signal handlers.
inline void PlatformExit();
static bool print_eval = false;
static bool force_repl = false;
static bool syntax_check_only = false;
static bool trace_deprecation = false;
static bool throw_deprecation = false;
static bool trace_sync_io = false;
static bool no_force_async_hooks_checks = false;
static bool track_heap_objects = false;
static const char* eval_string = nullptr;
static std::vector<std::string> preload_modules;
static const int v8_default_thread_pool_size = 4;
static int v8_thread_pool_size = v8_default_thread_pool_size;
static bool prof_process = false;
static bool v8_is_profiling = false;
static bool node_is_initialized = false;
static node_module* modpending;
static node_module* modlist_builtin;
static node_module* modlist_internal;
static node_module* modlist_linked;
static node_module* modlist_addon;
static std::string trace_enabled_categories; // NOLINT(runtime/string)
static std::string trace_file_pattern = // NOLINT(runtime/string)
"node_trace.${rotation}.log";
static bool abort_on_uncaught_exception = false;
// Bit flag used to track security reverts (see node_revert.h)
unsigned int reverted = 0;
#if defined(NODE_HAVE_I18N_SUPPORT)
// Path to ICU data (for i18n / Intl)
std::string icu_data_dir; // NOLINT(runtime/string)
#endif
// used by C++ modules as well
bool no_deprecation = false;
#if HAVE_OPENSSL
// use OpenSSL's cert store instead of bundled certs
bool ssl_openssl_cert_store =
#if defined(NODE_OPENSSL_CERT_STORE)
true;
#else
false;
#endif
# if NODE_FIPS_MODE
// used by crypto module
bool enable_fips_crypto = false;
bool force_fips_crypto = false;
# endif // NODE_FIPS_MODE
std::string openssl_config; // NOLINT(runtime/string)
#endif // HAVE_OPENSSL
// true if process warnings should be suppressed
bool no_process_warnings = false;
bool trace_warnings = false;
// Set in node.cc by ParseArgs when --preserve-symlinks is used.
// Used in node_config.cc to set a constant on process.binding('config')
// that is used by lib/module.js
bool config_preserve_symlinks = false;
// Set in node.cc by ParseArgs when --preserve-symlinks-main is used.
// Used in node_config.cc to set a constant on process.binding('config')
// that is used by lib/module.js
bool config_preserve_symlinks_main = false;
// Set in node.cc by ParseArgs when --experimental-modules is used.
// Used in node_config.cc to set a constant on process.binding('config')
// that is used by lib/module.js
bool config_experimental_modules = false;
// Set in node.cc by ParseArgs when --experimental-vm-modules is used.
// Used in node_config.cc to set a constant on process.binding('config')
// that is used by lib/vm.js
bool config_experimental_vm_modules = false;
// Set in node.cc by ParseArgs when --experimental-repl-await is used.
// Used in node_config.cc to set a constant on process.binding('config')
// that is used by lib/repl.js.
bool config_experimental_repl_await = false;
// Set in node.cc by ParseArgs when --loader is used.
// Used in node_config.cc to set a constant on process.binding('config')
// that is used by lib/internal/bootstrap/node.js
std::string config_userland_loader; // NOLINT(runtime/string)
// Set by ParseArgs when --pending-deprecation or NODE_PENDING_DEPRECATION
// is used.
bool config_pending_deprecation = false;
// Set in node.cc by ParseArgs when --redirect-warnings= is used.
std::string config_warning_file; // NOLINT(runtime/string)
// Set in node.cc by ParseArgs when --expose-internals or --expose_internals is
// used.
// Used in node_config.cc to set a constant on process.binding('config')
// that is used by lib/internal/bootstrap/node.js
bool config_expose_internals = false;
bool v8_initialized = false;
bool linux_at_secure = false;
// process-relative uptime base, initialized at start-up
static double prog_start_time;
static Mutex node_isolate_mutex;
static v8::Isolate* node_isolate;
DebugOptions debug_options;
static struct {
#if NODE_USE_V8_PLATFORM
void Initialize(int thread_pool_size) {
tracing_agent_.reset(new tracing::Agent(trace_file_pattern));
auto controller = tracing_agent_->GetTracingController();
tracing::TraceEventHelper::SetTracingController(controller);
StartTracingAgent();
platform_ = new NodePlatform(thread_pool_size, controller);
V8::InitializePlatform(platform_);
}
void Dispose() {
platform_->Shutdown();
delete platform_;
platform_ = nullptr;
tracing_agent_.reset(nullptr);
}
void DrainVMTasks(Isolate* isolate) {
platform_->DrainBackgroundTasks(isolate);
}
void CancelVMTasks(Isolate* isolate) {
platform_->CancelPendingDelayedTasks(isolate);
}
#if HAVE_INSPECTOR
bool StartInspector(Environment *env, const char* script_path,
const 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(platform_, script_path, options);
}
bool InspectorStarted(Environment *env) {
return env->inspector_agent()->IsStarted();
}
#endif // HAVE_INSPECTOR
void StartTracingAgent() {
tracing_agent_->Enable(trace_enabled_categories);
}
void StopTracingAgent() {
if (tracing_agent_)
tracing_agent_->Stop();
}
tracing::Agent* GetTracingAgent() const {
return tracing_agent_.get();
}
NodePlatform* Platform() {
return platform_;
}
std::unique_ptr<tracing::Agent> tracing_agent_;
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::Agent* GetTracingAgent() const { 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
static 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_ || 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->should_abort_on_uncaught_toggle()[0] &&
!env->inside_should_not_abort_on_uncaught_scope();
}
} // anonymous namespace
void AddPromiseHook(v8::Isolate* isolate, promise_hook_func fn, void* arg) {
Environment* env = Environment::GetCurrent(isolate);
env->AddPromiseHook(fn, arg);
}
void AddEnvironmentCleanupHook(v8::Isolate* isolate,
void (*fun)(void* arg),
void* arg) {
Environment* env = Environment::GetCurrent(isolate);
env->AddCleanupHook(fun, arg);
}
void RemoveEnvironmentCleanupHook(v8::Isolate* isolate,
void (*fun)(void* arg),
void* arg) {
Environment* env = Environment::GetCurrent(isolate);
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 Undefined(env->isolate());
}
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()) {
// NOTE: For backwards compatibility with public API we return Undefined()
// if the top level call threw.
scope.MarkAsFailed();
return scope.IsInnerMakeCallback() ? ret : Undefined(env->isolate());
}
scope.Close();
if (scope.Failed()) {
return Undefined(env->isolate());
}
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, v8::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());
Context::Scope context_scope(env->context());
return InternalMakeCallback(env, recv, callback,
argc, argv, asyncContext);
}
// 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>()));
}
enum encoding ParseEncoding(const char* encoding,
enum encoding default_encoding) {
switch (encoding[0]) {
case 'u':
// utf8, utf16le
if (encoding[1] == 't' && encoding[2] == 'f') {
// Skip `-`
encoding += encoding[3] == '-' ? 4 : 3;
if (encoding[0] == '8' && encoding[1] == '\0')
return UTF8;
if (strncmp(encoding, "16le", 4) == 0)
return UCS2;
// ucs2
} else if (encoding[1] == 'c' && encoding[2] == 's') {
encoding += encoding[3] == '-' ? 4 : 3;
if (encoding[0] == '2' && encoding[1] == '\0')
return UCS2;
}
break;
case 'l':
// latin1
if (encoding[1] == 'a') {
if (strncmp(encoding + 2, "tin1", 4) == 0)
return LATIN1;
}
break;
case 'b':
// binary
if (encoding[1] == 'i') {
if (strncmp(encoding + 2, "nary", 4) == 0)
return LATIN1;
// buffer
} else if (encoding[1] == 'u') {
if (strncmp(encoding + 2, "ffer", 4) == 0)
return BUFFER;
}
break;
case '\0':
return default_encoding;
default:
break;
}
if (StringEqualNoCase(encoding, "utf8")) {
return UTF8;
} else if (StringEqualNoCase(encoding, "utf-8")) {
return UTF8;
} else if (StringEqualNoCase(encoding, "ascii")) {
return ASCII;
} else if (StringEqualNoCase(encoding, "base64")) {
return BASE64;
} else if (StringEqualNoCase(encoding, "ucs2")) {
return UCS2;
} else if (StringEqualNoCase(encoding, "ucs-2")) {
return UCS2;
} else if (StringEqualNoCase(encoding, "utf16le")) {
return UCS2;
} else if (StringEqualNoCase(encoding, "utf-16le")) {
return UCS2;
} else if (StringEqualNoCase(encoding, "latin1")) {
return LATIN1;
} else if (StringEqualNoCase(encoding, "binary")) {
return LATIN1; // BINARY is a deprecated alias of LATIN1.
} else if (StringEqualNoCase(encoding, "buffer")) {
return BUFFER;
} else if (StringEqualNoCase(encoding, "hex")) {
return HEX;
} else {
return default_encoding;
}
}
enum encoding ParseEncoding(Isolate* isolate,
Local<Value> encoding_v,
enum encoding default_encoding) {
CHECK(!encoding_v.IsEmpty());
if (!encoding_v->IsString())
return default_encoding;
node::Utf8Value encoding(isolate, encoding_v);
return ParseEncoding(*encoding, default_encoding);
}
Local<Value> Encode(Isolate* isolate,
const char* buf,
size_t len,
enum encoding encoding) {
CHECK_NE(encoding, UCS2);
Local<Value> error;
return StringBytes::Encode(isolate, buf, len, encoding, &error)
.ToLocalChecked();
}
Local<Value> Encode(Isolate* isolate, const uint16_t* buf, size_t len) {
Local<Value> error;
return StringBytes::Encode(isolate, buf, len, &error)
.ToLocalChecked();
}
// Returns -1 if the handle was not valid for decoding
ssize_t DecodeBytes(Isolate* isolate,
Local<Value> val,
enum encoding encoding) {
HandleScope scope(isolate);
return StringBytes::Size(isolate, val, encoding);
}
// Returns number of bytes written.
ssize_t DecodeWrite(Isolate* isolate,
char* buf,
size_t buflen,
Local<Value> val,
enum encoding encoding) {
return StringBytes::Write(isolate, buf, buflen, val, encoding, nullptr);
}
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);
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.