src: replace SetNamedPropertyHandler() with SetHandler()

The changes introdcued here replace the deprecated
v8 method SetNamedPropertyHandler() to SetHandler()
in node.cc.
Prior to refactoring, the method defined callbacks
when accessing object properties defined by Strings
and not Symbols.
test/parallel/test-v8-interceptStrings-not-Symbols.js
demonstrates that this behaviour remained unchanged
after refactoring.

src/node.cc

@@ -114,13 +114,15 @@ using v8::Locker;
 using v8::MaybeLocal;
 using v8::Message;
 using v8::Name;
+using v8::NamedPropertyHandlerConfiguration;
 using v8::Null;
 using v8::Number;
 using v8::Object;
 using v8::ObjectTemplate;
 using v8::Promise;
 using v8::PromiseRejectMessage;
 using v8::PropertyCallbackInfo;
+using v8::PropertyHandlerFlags;
 using v8::ScriptOrigin;
 using v8::SealHandleScope;
 using v8::String;
@@ -2662,7 +2664,7 @@ static void ProcessTitleSetter(Local<Name> property,
 }
 
 
-static void EnvGetter(Local<String> property,
+static void EnvGetter(Local<Name> property,
                       const PropertyCallbackInfo<Value>& info) {
   Isolate* isolate = info.GetIsolate();
 #ifdef __POSIX__
@@ -2690,7 +2692,7 @@ static void EnvGetter(Local<String> property,
 }
 
 
-static void EnvSetter(Local<String> property,
+static void EnvSetter(Local<Name> property,
                       Local<Value> value,
                       const PropertyCallbackInfo<Value>& info) {
 #ifdef __POSIX__
@@ -2711,7 +2713,7 @@ static void EnvSetter(Local<String> property,
 }
 
 
-static void EnvQuery(Local<String> property,
+static void EnvQuery(Local<Name> property,
                      const PropertyCallbackInfo<Integer>& info) {
   int32_t rc = -1;  // Not found unless proven otherwise.
 #ifdef __POSIX__
@@ -2737,7 +2739,7 @@ static void EnvQuery(Local<String> property,
 }
 
 
-static void EnvDeleter(Local<String> property,
+static void EnvDeleter(Local<Name> property,
                        const PropertyCallbackInfo<Boolean>& info) {
 #ifdef __POSIX__
   node::Utf8Value key(info.GetIsolate(), property);
@@ -3138,12 +3140,16 @@ void SetupProcessObject(Environment* env,
   // create process.env
   Local<ObjectTemplate> process_env_template =
       ObjectTemplate::New(env->isolate());
-  process_env_template->SetNamedPropertyHandler(EnvGetter,
-                                                EnvSetter,
-                                                EnvQuery,
-                                                EnvDeleter,
-                                                EnvEnumerator,
-                                                env->as_external());
+
+  process_env_template->SetHandler(NamedPropertyHandlerConfiguration(
+          EnvGetter,
+          EnvSetter,
+          EnvQuery,
+          EnvDeleter,
+          EnvEnumerator,
+          env->as_external(),
+          PropertyHandlerFlags::kOnlyInterceptStrings));
+
   Local<Object> process_env =
       process_env_template->NewInstance(env->context()).ToLocalChecked();
   process->Set(env->env_string(), process_env);

test/parallel/test-v8-interceptStrings-not-Symbols.js

@@ -0,0 +1,34 @@
+'use strict';
+require('../common');
+
+const assert = require('assert');
+
+// Test that the v8 named property handler intercepts callbacks
+// when properties are defined as Strings and NOT for Symbols.
+//
+// With the kOnlyInterceptStrings flag, manipulating properties via
+// Strings is intercepted by the callbacks, while Symbols adopt
+// the default global behaviour.
+// Removing the kOnlyInterceptStrings flag, adds intercepting to Symbols,
+// which causes Type Error at process.env[symbol]=42 due to process.env being
+// strongly typed for Strings
+// (node::Utf8Value key(info.GetIsolate(), property);).
+
+
+const symbol = Symbol('sym');
+
+// check if its undefined
+assert.strictEqual(process.env[symbol], undefined);
+
+// set a value using a Symbol
+process.env[symbol] = 42;
+
+// set a value using a String (call to EnvSetter, node.cc)
+process.env['s'] = 42;
+
+//check the values after substitutions
+assert.strictEqual(42, process.env[symbol]);
+assert.strictEqual('42', process.env['s']);
+
+delete process.env[symbol];
+assert.strictEqual(undefined, process.env[symbol]);