Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 25 insertions, 0 deletions

diff --git a/js/src/jit-test/tests/sharedbuf/slice-same-memory.js b/js/src/jit-test/tests/sharedbuf/slice-same-memory.js
new file mode 100644
index 0000000000..22c2215424
--- /dev/null
+++ b/js/src/jit-test/tests/sharedbuf/slice-same-memory.js
@@ -0,0 +1,25 @@
+// |jit-test| skip-if: !this.SharedArrayBuffer
+
+load(libdir + "asserts.js");
+
+var sab = new SharedArrayBuffer(1 * Int32Array.BYTES_PER_ELEMENT);
+
+// Make a copy, sharing the same memory
+var sab2 = (setSharedObject(sab), getSharedObject());
+
+// Assert it's not the same object
+assertEq(sab === sab2, false);
+
+// Assert they're sharing memory
+new Int32Array(sab)[0] = 0x12345678;
+assertEq(new Int32Array(sab2)[0], 0x12345678)
+
+sab.constructor = {
+  [Symbol.species]: function(length) {
+    return sab2;
+  }
+};
+
+// This should throw because the buffer being sliced shares memory with the new
+// buffer it constructs.
+assertThrowsInstanceOf(() => sab.slice(), TypeError);