LibJS: Prevent extensions of TypedArray exotic objects

This is a normative change in the ECMA-262 spec. See: c1040ff
Author: https://github.com/trflynn89 Commit: 53a507303c Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2646 Reviewed-by: https://github.com/shannonbooth ✅
2025-09-11 20:16:02 +00:00 · 2024-11-29 13:28:55 -05:00 · 2024-11-29 13:28:55 -05:00 · 53a507303c · 2024-11-30 10:21:05 +00:00
commit 53a507303c
parent c6e684791f
3 changed files with 75 additions and 16 deletions
--- a/Libraries/LibJS/Tests/builtins/Object/Object.freeze.js
+++ b/Libraries/LibJS/Tests/builtins/Object/Object.freeze.js
@ -83,3 +83,28 @@ test("freeze with huge number of properties doesn't crash", () => {
    }
    Object.freeze(o);
 });
+
+test("freeze with TypedArray", () => {
+    const TYPED_ARRAYS = [
+        Uint8Array,
+        Uint8ClampedArray,
+        Uint16Array,
+        Uint32Array,
+        Int8Array,
+        Int16Array,
+        Int32Array,
+        Float16Array,
+        Float32Array,
+        Float64Array,
+    ];
+
+    const buffer = new ArrayBuffer(5, { maxByteLength: 10 });
+
+    TYPED_ARRAYS.forEach(T => {
+        const typedArray = new T(buffer, 0, 0);
+
+        expect(() => {
+            Object.freeze(typedArray);
+        }).toThrowWithMessage(TypeError, "Could not freeze object");
+    });
+});