From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <mattatobin@localhost.localdomain>
Date: Fri, 2 Feb 2018 04:16:08 -0500
Subject: Add m-esr52 at 52.6.0

---
 .../jit-test/tests/basic/globals-shared-shapes.js  | 30 ++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 js/src/jit-test/tests/basic/globals-shared-shapes.js

(limited to 'js/src/jit-test/tests/basic/globals-shared-shapes.js')

diff --git a/js/src/jit-test/tests/basic/globals-shared-shapes.js b/js/src/jit-test/tests/basic/globals-shared-shapes.js
new file mode 100644
index 000000000..f2f0013ce
--- /dev/null
+++ b/js/src/jit-test/tests/basic/globals-shared-shapes.js
@@ -0,0 +1,30 @@
+// Test that objects in different compartments can have the same shape.
+
+var g1 = newGlobal();
+var g2 = newGlobal({sameZoneAs: g1});
+
+g1.eval("x1 = {foo: 1}");
+g2.eval("x2 = {foo: 2}");
+assertEq(unwrappedObjectsHaveSameShape(g1.x1, g2.x2), true);
+
+g1.eval("x1 = [1]");
+g2.eval("x2 = [2]");
+assertEq(unwrappedObjectsHaveSameShape(g1.x1, g2.x2), true);
+
+g1.eval("x1 = function f(){}");
+g2.eval("x2 = function f(){}");
+assertEq(unwrappedObjectsHaveSameShape(g1.x1, g2.x2), true);
+
+g1.eval("x1 = /abc/;");
+g2.eval("x2 = /def/");
+assertEq(unwrappedObjectsHaveSameShape(g1.x1, g2.x2), true);
+
+// Now the same, but we change Array.prototype.__proto__.
+// The arrays should no longer get the same Shape, as their
+// proto chain is different.
+g1 = newGlobal();
+g2 = newGlobal({sameZoneAs: g1});
+g1.eval("x1 = [1];");
+g2.eval("Array.prototype.__proto__ = Math;");
+g2.eval("x2 = [2];");
+assertEq(unwrappedObjectsHaveSameShape(g1.x1, g2.x2), false);
-- 
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