process: wrap process.binding for selective fallthrough

Selectively fallthrough `process.binding()` to `internalBinding()`

Refs: #22163

PR-URL: #22269
Reviewed-By: Gus Caplan <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Jon Moss <[email protected]>
Reviewed-By: John-David Dalton <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>

Author: jasnell

lib/internal/bootstrap/node.js

@@ -318,6 +318,21 @@
       for (var i = 0; i < arguments.length; i++)
         this.push(arguments[i]);
     }
+
+    // Deprecated specific process.binding() modules, but not all, allow
+    // selective fallback to internalBinding for the deprecated ones.
+    const { SafeSet } = NativeModule.require('internal/safe_globals');
+    const processBinding = process.binding;
+    // internalBindingWhitelist contains the name of internalBinding modules
+    // that are whitelisted for access via process.binding()... this is used
+    // to provide a transition path for modules that are being moved over to
+    // internalBinding.
+    const internalBindingWhitelist = new SafeSet(['uv']);
+    process.binding = function binding(name) {
+      return internalBindingWhitelist.has(name) ?
+        internalBinding(name) :
+        processBinding(name);
+    };
   }
 
   function setupGlobalVariables() {

test/parallel/test-process-binding-internalbinding-whitelist.js

@@ -0,0 +1,9 @@
+// Flags: --no-warnings
+'use strict';
+
+require('../common');
+const assert = require('assert');
+
+// Assert that whitelisted internalBinding modules are accessible via
+// process.binding().
+assert(process.binding('uv'));