1 files changed, 129 insertions, 0 deletions
diff --git a/js/src/tests/non262/extensions/clone-transferables.js b/js/src/tests/non262/extensions/clone-transferables.js
new file mode 100644
index 0000000000..6b3ff99079
--- /dev/null
+++ b/js/src/tests/non262/extensions/clone-transferables.js
@@ -0,0 +1,129 @@
+// |reftest| skip-if(!xulRuntime.shell)
+// Any copyright is dedicated to the Public Domain.
+// http://creativecommons.org/licenses/publicdomain/
+
+function* buffer_options() {
+    for (var scope of ["SameProcess",
+                       "DifferentProcess",
+                       "DifferentProcessForIndexedDB"])
+    {
+        for (var size of [0, 8, 16, 200, 1000, 4096, 8192, 65536]) {
+            yield { scope, size };
+        }
+    }
+}
+
+
+function test() {
+    for (var {scope, size} of buffer_options()) {
+        var old = new ArrayBuffer(size);
+        var copy = deserialize(serialize([old, old], [old], { scope }), { scope });
+        assertEq(old.byteLength, 0);
+        assertEq(copy[0] === copy[1], true);
+        copy = copy[0];
+        assertEq(copy.byteLength, size);
+
+        var constructors = [ Int8Array,
+                             Uint8Array,
+                             Int16Array,
+                             Uint16Array,
+                             Int32Array,
+                             Uint32Array,
+                             Float32Array,
+                             Float64Array,
+                             Uint8ClampedArray,
+                             DataView ];
+
+        for (var ctor of constructors) {
+            var dataview = (ctor === DataView);
+
+            var buf = new ArrayBuffer(size);
+            var old_arr = new ctor(buf);
+            assertEq(buf.byteLength, size);
+            assertEq(buf, old_arr.buffer);
+            if (!dataview)
+                assertEq(old_arr.length, size / old_arr.BYTES_PER_ELEMENT);
+
+            var copy_arr = deserialize(serialize(old_arr, [ buf ], { scope }), { scope });
+            assertEq(buf.byteLength, 0,
+                     "donor array buffer should be detached");
+            if (!dataview) {
+                assertEq(old_arr.length, 0,
+                         "donor typed array should be detached");
+            }
+            assertEq(copy_arr.buffer.byteLength == size, true);
+            if (!dataview)
+                assertEq(copy_arr.length, size / old_arr.BYTES_PER_ELEMENT);
+
+            buf = null;
+            old_arr = null;
+            gc(); // Tickle the ArrayBuffer -> view management
+        }
+
+        for (var ctor of constructors) {
+            var dataview = (ctor === DataView);
+
+            var buf = new ArrayBuffer(size);
+            var old_arr = new ctor(buf);
+            var dv = new DataView(buf); // Second view
+            var copy_arr = deserialize(serialize(old_arr, [ buf ], { scope }), { scope });
+            assertEq(buf.byteLength, 0,
+                     "donor array buffer should be detached");
+            if (!dataview) {
+                assertEq(old_arr.byteLength, 0,
+                         "donor typed array should be detached");
+                assertEq(old_arr.length, 0,
+                         "donor typed array should be detached");
+            }
+
+            buf = null;
+            old_arr = null;
+            gc(); // Tickle the ArrayBuffer -> view management
+        }
+
+        // Mutate the buffer during the clone operation. The modifications should be visible.
+        if (size >= 4) {
+            old = new ArrayBuffer(size);
+            var view = new Int32Array(old);
+            view[0] = 1;
+            var mutator = { get foo() { view[0] = 2; } };
+            var copy = deserialize(serialize([ old, mutator ], [ old ], { scope }), { scope });
+            var viewCopy = new Int32Array(copy[0]);
+            assertEq(view.length, 0); // Underlying buffer now detached.
+            assertEq(viewCopy[0], 2);
+        }
+
+        // Detach the buffer during the clone operation. Should throw an
+        // exception.
+        if (size >= 4) {
+            const b1 = new ArrayBuffer(size);
+            let mutator = {
+                get foo() {
+                    serialize(b1, [b1], { scope });
+                }
+            };
+
+            assertThrowsInstanceOf(
+                () => serialize([ b1, mutator ], [b1]),
+                TypeError,
+                "detaching (due to Transferring) while serializing should throw"
+            );
+
+            const b2 = new ArrayBuffer(size);
+            mutator = {
+                get foo() {
+                    detachArrayBuffer(b2);
+                }
+            };
+
+            assertThrowsInstanceOf(
+                () => serialize([ b2, mutator ], [b2]),
+                TypeError,
+                "detaching (due to detachArrayBuffer) while serializing should throw"
+            );
+        }
+    }
+}
+
+test();
+reportCompare(0, 0, 'ok');