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src: improve error handling in node_os by removing ToLocalChecked #56888

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Feb 5, 2025
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src: improve error handling in node_os by removing ToLocalChecked #56888

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103 changes: 55 additions & 48 deletions src/node_os.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -50,6 +50,7 @@ using v8::Isolate;
using v8::Local;
using v8::LocalVector;
using v8::MaybeLocal;
using v8::Name;
using v8::NewStringType;
using v8::Null;
using v8::Number;
Expand All @@ -71,8 +72,10 @@ static void GetHostname(const FunctionCallbackInfo<Value>& args) {
return args.GetReturnValue().SetUndefined();
}

args.GetReturnValue().Set(
String::NewFromUtf8(env->isolate(), buf).ToLocalChecked());
Local<Value> ret;
if (String::NewFromUtf8(env->isolate(), buf).ToLocal(&ret)) {
args.GetReturnValue().Set(ret);
}
}

static void GetOSInformation(const FunctionCallbackInfo<Value>& args) {
Expand All @@ -87,15 +90,18 @@ static void GetOSInformation(const FunctionCallbackInfo<Value>& args) {
}

// [sysname, version, release, machine]
Local<Value> osInformation[] = {
String::NewFromUtf8(env->isolate(), info.sysname).ToLocalChecked(),
String::NewFromUtf8(env->isolate(), info.version).ToLocalChecked(),
String::NewFromUtf8(env->isolate(), info.release).ToLocalChecked(),
String::NewFromUtf8(env->isolate(), info.machine).ToLocalChecked()};

args.GetReturnValue().Set(Array::New(env->isolate(),
osInformation,
arraysize(osInformation)));
Local<Value> osInformation[4];
if (String::NewFromUtf8(env->isolate(), info.sysname)
.ToLocal(&osInformation[0]) &&
String::NewFromUtf8(env->isolate(), info.version)
.ToLocal(&osInformation[1]) &&
String::NewFromUtf8(env->isolate(), info.release)
.ToLocal(&osInformation[2]) &&
String::NewFromUtf8(env->isolate(), info.machine)
.ToLocal(&osInformation[3])) {
args.GetReturnValue().Set(
Array::New(env->isolate(), osInformation, arraysize(osInformation)));
}
}

static void GetCPUInfo(const FunctionCallbackInfo<Value>& args) {
Expand Down Expand Up @@ -204,7 +210,10 @@ static void GetInterfaceAddresses(const FunctionCallbackInfo<Value>& args) {
// to assume UTF8 as the default as well. It’s what people will expect if
// they name the interface from any input that uses UTF-8, which should be
// the most frequent case by far these days.)
name = String::NewFromUtf8(isolate, raw_name).ToLocalChecked();
if (!String::NewFromUtf8(isolate, raw_name).ToLocal(&name)) {
// Error occurred creating the string.
return;
}

snprintf(mac.data(),
mac.size(),
Expand Down Expand Up @@ -262,11 +271,11 @@ static void GetHomeDirectory(const FunctionCallbackInfo<Value>& args) {
return args.GetReturnValue().SetUndefined();
}

Local<String> home = String::NewFromUtf8(env->isolate(),
buf,
NewStringType::kNormal,
len).ToLocalChecked();
args.GetReturnValue().Set(home);
Local<String> home;
if (String::NewFromUtf8(env->isolate(), buf, NewStringType::kNormal, len)
.ToLocal(&home)) {
args.GetReturnValue().Set(home);
}
}


Expand Down Expand Up @@ -311,43 +320,41 @@ static void GetUserInfo(const FunctionCallbackInfo<Value>& args) {
Local<Value> gid = Number::New(env->isolate(), pwd.gid);
#endif

MaybeLocal<Value> username = StringBytes::Encode(env->isolate(),
pwd.username,
encoding,
&error);
MaybeLocal<Value> homedir = StringBytes::Encode(env->isolate(),
pwd.homedir,
encoding,
&error);
MaybeLocal<Value> shell;

if (pwd.shell == nullptr)
shell = Null(env->isolate());
else
shell = StringBytes::Encode(env->isolate(), pwd.shell, encoding, &error);

if (username.IsEmpty() || homedir.IsEmpty() || shell.IsEmpty()) {
Local<Value> username;
if (!StringBytes::Encode(env->isolate(), pwd.username, encoding, &error)
.ToLocal(&username)) {
CHECK(!error.IsEmpty());
env->isolate()->ThrowException(error);
return;
}

Local<Value> homedir;
if (!StringBytes::Encode(env->isolate(), pwd.homedir, encoding, &error)
.ToLocal(&homedir)) {
CHECK(!error.IsEmpty());
env->isolate()->ThrowException(error);
return;
}

Local<Value> shell = Null(env->isolate());
if (pwd.shell != nullptr &&
!StringBytes::Encode(env->isolate(), pwd.shell, encoding, &error)
.ToLocal(&shell)) {
CHECK(!error.IsEmpty());
env->isolate()->ThrowException(error);
return;
}

constexpr size_t kRetLength = 5;
std::array<Local<v8::Name>, kRetLength> names = {env->uid_string(),
env->gid_string(),
env->username_string(),
env->homedir_string(),
env->shell_string()};
std::array values = {uid,
gid,
username.ToLocalChecked(),
homedir.ToLocalChecked(),
shell.ToLocalChecked()};
args.GetReturnValue().Set(Object::New(env->isolate(),
Null(env->isolate()),
names.data(),
values.data(),
kRetLength));
Local<Name> names[kRetLength] = {env->uid_string(),
env->gid_string(),
env->username_string(),
env->homedir_string(),
env->shell_string()};
Local<Value> values[kRetLength] = {uid, gid, username, homedir, shell};

args.GetReturnValue().Set(Object::New(
env->isolate(), Null(env->isolate()), &names[0], &values[0], kRetLength));
}


Expand Down
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