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js/src/jit-test/tests/debug/Environment-identity-04.js@6474c204b198 (annotated)

js/src/jit-test/tests/debug/Environment-identity-04.js

Wed, 31 Dec 2014 06:09:35 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Wed, 31 Dec 2014 06:09:35 +0100

changeset 0

6474c204b198

permissions

-rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

michael@0	1	// Observably different visits to the same with-statement produce distinct Environments.
michael@0	2
michael@0	3	var g = newGlobal();
michael@0	4	g.eval("function f(a, obj) { with (obj) return function () { return a; }; }");
michael@0	5	var dbg = Debugger(g);
michael@0	6	var hits = 0;
michael@0	7	dbg.onDebuggerStatement = function (frame) {
michael@0	8	// Even though the two visits to the with-statement have the same target
michael@0	9	// object, Math, the environments are observably different.
michael@0	10	var f1 = frame.eval("f(1, Math);").return;
michael@0	11	var f2 = frame.eval("f(2, Math);").return;
michael@0	12	assertEq(f1.environment !== f2.environment, true);
michael@0	13	assertEq(f1.object, f2.object);
michael@0	14	assertEq(f1.call().return, 1);
michael@0	15	assertEq(f2.call().return, 2);
michael@0	16	hits++;
michael@0	17	};
michael@0	18	g.eval("debugger;");
michael@0	19	assertEq(hits, 1);