From 8fee9b7271339379628f41ba469e9633ae410a45 Mon Sep 17 00:00:00 2001
From: ExE Boss <3889017+ExE-Boss@users.noreply.github.com>
Date: Sat, 7 Nov 2020 08:40:00 +0100
Subject: [PATCH] =?UTF-8?q?lib:=20add=C2=A0%TypedArray%=20abstract=C2=A0co?=
 =?UTF-8?q?nstructor=20to=C2=A0primordials?=
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Refs: https://github.com/nodejs/node/pull/35448
Refs: https://github.com/nodejs/node/pull/36003
Refs: https://tc39.es/ecma262/#sec-%typedarray%-intrinsic-object

Co-authored-by: Antoine du Hamel <duhamelantoine1995@gmail.com>
---
 lib/internal/freeze_intrinsics.js       |  6 ++++--
 lib/internal/per_context/primordials.js | 13 +++++++++++++
 lib/internal/util/inspect.js            |  5 ++---
 lib/internal/util/types.js              |  5 +----
 4 files changed, 20 insertions(+), 9 deletions(-)

diff --git a/lib/internal/freeze_intrinsics.js b/lib/internal/freeze_intrinsics.js
index 21612790ce749c..5e99af2d9ad0bb 100644
--- a/lib/internal/freeze_intrinsics.js
+++ b/lib/internal/freeze_intrinsics.js
@@ -65,6 +65,8 @@ const {
   SymbolIterator,
   SyntaxError,
   TypeError,
+  TypedArray,
+  TypedArrayPrototype,
   Uint16Array,
   Uint32Array,
   Uint8Array,
@@ -105,7 +107,7 @@ module.exports = function() {
     // AsyncGeneratorFunction
     ObjectGetPrototypeOf(async function* () {}),
     // TypedArray
-    ObjectGetPrototypeOf(Uint8Array),
+    TypedArrayPrototype,
 
     // 19 Fundamental Objects
     Object.prototype, // 19.1
@@ -189,7 +191,7 @@ module.exports = function() {
     // AsyncGeneratorFunction
     ObjectGetPrototypeOf(async function* () {}),
     // TypedArray
-    ObjectGetPrototypeOf(Uint8Array),
+    TypedArray,
 
     // 18 The Global Object
     eval,
diff --git a/lib/internal/per_context/primordials.js b/lib/internal/per_context/primordials.js
index ddecb18861c258..e8e64baf0c6429 100644
--- a/lib/internal/per_context/primordials.js
+++ b/lib/internal/per_context/primordials.js
@@ -175,5 +175,18 @@ primordials.SafePromise = makeSafe(
   copyPrototype(original.prototype, primordials, `${name}Prototype`);
 });
 
+// Create copies of abstract intrinsic objects that are not directly exposed
+// on the global object.
+// Refs: https://tc39.es/ecma262/#sec-%typedarray%-intrinsic-object
+[
+  { name: 'TypedArray', original: Reflect.getPrototypeOf(Uint8Array) },
+].forEach(({ name, original }) => {
+  primordials[name] = original;
+  // The static %TypedArray% methods require a valid `this`, but can't be bound,
+  // as they need a subclass constructor as the receiver:
+  copyPrototype(original, primordials, name);
+  copyPrototype(original.prototype, primordials, `${name}Prototype`);
+});
+
 Object.setPrototypeOf(primordials, null);
 Object.freeze(primordials);
diff --git a/lib/internal/util/inspect.js b/lib/internal/util/inspect.js
index e6787760fea392..4e1ed55c81cd98 100644
--- a/lib/internal/util/inspect.js
+++ b/lib/internal/util/inspect.js
@@ -57,10 +57,10 @@ const {
   SymbolPrototypeValueOf,
   SymbolIterator,
   SymbolToStringTag,
+  TypedArrayPrototype,
   Uint16Array,
   Uint32Array,
   Uint8Array,
-  Uint8ArrayPrototype,
   Uint8ClampedArray,
   uncurryThis,
 } = primordials;
@@ -141,8 +141,7 @@ const setSizeGetter = uncurryThis(
 const mapSizeGetter = uncurryThis(
   ObjectGetOwnPropertyDescriptor(MapPrototype, 'size').get);
 const typedArraySizeGetter = uncurryThis(
-  ObjectGetOwnPropertyDescriptor(
-    ObjectGetPrototypeOf(Uint8ArrayPrototype), 'length').get);
+  ObjectGetOwnPropertyDescriptor(TypedArrayPrototype, 'length').get);
 
 let hexSlice;
 
diff --git a/lib/internal/util/types.js b/lib/internal/util/types.js
index 4b9eeb469b2d19..115c473ae221d4 100644
--- a/lib/internal/util/types.js
+++ b/lib/internal/util/types.js
@@ -3,14 +3,11 @@
 const {
   ArrayBufferIsView,
   ObjectGetOwnPropertyDescriptor,
-  ObjectGetPrototypeOf,
   SymbolToStringTag,
-  Uint8ArrayPrototype,
+  TypedArrayPrototype,
   uncurryThis,
 } = primordials;
 
-const TypedArrayPrototype = ObjectGetPrototypeOf(Uint8ArrayPrototype);
-
 const TypedArrayProto_toStringTag =
     uncurryThis(
       ObjectGetOwnPropertyDescriptor(TypedArrayPrototype,