1 files changed, 50 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/large-buffers/basic.js b/js/src/jit-test/tests/large-buffers/basic.js
new file mode 100644
index 0000000000..58db1ee128
--- /dev/null
+++ b/js/src/jit-test/tests/large-buffers/basic.js
@@ -0,0 +1,50 @@
+// Basic smoke tests for large ArrayBuffers.
+
+let gb = 1 * 1024 * 1024 * 1024;
+
+function test1() {
+    let ab = new ArrayBuffer(7 * gb);
+    assertEq(ab.byteLength, 7 * gb);
+
+    let taInt16 = new Int16Array(ab);
+    assertEq(taInt16.byteOffset, 0);
+    assertEq(taInt16.byteLength, 7 * gb);
+    assertEq(taInt16.length, 3.5 * gb);
+
+    let taInt16LastGb = new Int16Array(ab, 6 * gb);
+    assertEq(taInt16LastGb.byteOffset, 6 * gb);
+    assertEq(taInt16LastGb.byteLength, 1 * gb);
+    assertEq(taInt16LastGb.length, 0.5 * gb);
+
+    taInt16LastGb[0] = -99;
+    assertEq(taInt16[3 * gb], -99);
+
+    let taUint8 = new Uint8Array(ab);
+    assertEq(taUint8.length, 7 * gb);
+    assertEq(taUint8[7 * gb - 1], 0);
+
+    taUint8[7 * gb - 1] = 42;
+    taUint8[7 * gb - 1]++;
+    ++taUint8[7 * gb - 1];
+    assertEq(taUint8[7 * gb - 1], 44);
+
+    let dv = new DataView(ab);
+    assertEq(dv.getInt16(6 * gb, true), -99);
+    assertEq(dv.getUint8(7 * gb - 1, true), 44);
+
+    dv.setInt16(6 * gb + 2, 123, true);
+    assertEq(taInt16LastGb[1], 123);
+}
+test1();
+
+function test2() {
+    let taInt8 = new Int8Array(4 * gb);
+    assertEq(taInt8.length, 4 * gb);
+    taInt8[4 * gb - 4] = 42;
+    assertEq(taInt8[4 * gb - 4], 42);
+
+    let dv = new DataView(taInt8.buffer);
+    assertEq(dv.getInt32(4 * gb - 4, true), 42);
+    assertEq(dv.getBigInt64(4 * gb - 8, true), 180388626432n);
+}
+test2();