1 files changed, 19 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/large-arraybuffers/max-typed-array-size.js b/js/src/jit-test/tests/large-arraybuffers/max-typed-array-size.js
new file mode 100644
index 0000000000..3cf01057b6
--- /dev/null
+++ b/js/src/jit-test/tests/large-arraybuffers/max-typed-array-size.js
@@ -0,0 +1,19 @@
+load(libdir + "asserts.js");
+
+const maxByteLength = 8 * 1024 * 1024 * 1024;
+
+// Test only the smallest and largest element type, because allocating a lot of
+// large buffers can be pretty slow.
+for (let ctor of [Int8Array, BigInt64Array]) {
+    const maxLength = maxByteLength / ctor.BYTES_PER_ELEMENT;
+    let ta1 = new ctor(maxLength);
+    assertEq(ta1.length, maxLength);
+    ta1[maxLength - 1]++;
+
+    let ta2 = new ctor(ta1.buffer, 0, maxLength);
+    assertEq(ta2.length, maxLength);
+    assertEq(ta1[maxLength - 1], ta2[maxLength - 1]);
+
+    assertThrowsInstanceOf(() => new ctor(maxLength + 1), RangeError);
+    assertThrowsInstanceOf(() => new ctor(ta1.buffer, 0, maxLength + 1), RangeError);
+}