Add m-esr52 at 52.6.0

1 files changed, 23 insertions, 0 deletions

diff --git a/js/src/jit-test/tests/saved-stacks/principals-03.js b/js/src/jit-test/tests/saved-stacks/principals-03.js
new file mode 100644
index 000000000..006b4477c
--- /dev/null
+++ b/js/src/jit-test/tests/saved-stacks/principals-03.js
@@ -0,0 +1,23 @@
+// With arrows representing child-to-parent links, create a SavedFrame stack
+// like this:
+//
+//     high.a -> low.b
+//
+// in `low`'s compartment and give `low` a reference to this stack. Assert the
+// stack's youngest frame's properties doesn't leak information about `high.a`
+// that `low` shouldn't have access to, and instead returns information about
+// `low.b`.
+
+var low = newGlobal({ principal: 0 });
+var high = newGlobal({ principal: 0xfffff });
+
+low.high = high;
+high.low = low;
+
+high.eval("function a() { return saveStack(0, low); }");
+low.eval("function b() { return high.a(); }")
+
+var stack = low.b();
+
+assertEq(stack.functionDisplayName, "b");
+assertEq(stack.parent, null);