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js/src/jit-test/tests/debug/Environment-identity-01.js@6474c204b198 (annotated)

js/src/jit-test/tests/debug/Environment-identity-01.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	// The value of frame.environment is the same Environment object at different
michael@0	2	// times within a single visit to a scope.
michael@0	3
michael@0	4	var g = newGlobal();
michael@0	5	var dbg = Debugger(g);
michael@0	6	g.eval("function h() { debugger; }");
michael@0	7	var hits, env;
michael@0	8	dbg.onDebuggerStatement = function (hframe) {
michael@0	9	var frame = hframe.older;
michael@0	10	var e = frame.environment;
michael@0	11
michael@0	12	// frame.environment is at least cached from one moment to the next.
michael@0	13	assertEq(e, frame.environment);
michael@0	14
michael@0	15	// frame.environment is cached from statement to statement within a call frame.
michael@0	16	if (env === undefined)
michael@0	17	env = e;
michael@0	18	else
michael@0	19	assertEq(e, env);
michael@0	20
michael@0	21	hits++;
michael@0	22	};
michael@0	23
michael@0	24	hits = 0;
michael@0	25	env = undefined;
michael@0	26	g.eval("function f() { (function () { var i = 0; h(); var j = 2; h(); })(); }");
michael@0	27	g.f();
michael@0	28	assertEq(hits, 2);
michael@0	29
michael@0	30	hits = 0;
michael@0	31	env = undefined;
michael@0	32	g.eval("function f2() { { let i = 0; h(); let j = 2; h(); } }");
michael@0	33	g.f2();
michael@0	34	assertEq(hits, 2);
michael@0	35
michael@0	36	hits = 0;
michael@0	37	env = undefined;
michael@0	38	g.eval("function f3() { { let i; for (i = 0; i < 2; i++) h(); } }");
michael@0	39	g.f3();
michael@0	40	assertEq(hits, 2);