The Tor Browser: js/src/jit-test/tests/ion/entryOverflowBailout.js@6474c204b198 (annotated)

js/src/jit-test/tests/ion/entryOverflowBailout.js@6474c204b198 (annotated)

js/src/jit-test/tests/ion/entryOverflowBailout.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.

 var o;
 var f1;
 var counter = 0;
 function f2(a) {
     bailout();
     return f2.arguments;
 };
 var restartCode = "counter = 0; " + f2.toSource();
 // We need to reevaluate this function everytime, otherwise it is flagged as
 // having an argument object and it would not be re-entered.
 // This test case is checking that f.arguments reflects the overflow or the
 // underflow of arguments after a bailout.  Due to the way bailouts are
 // recovered we need to check for the intial frame and for any other JS frame
 // below.
 //
 // To produce a JSFrame, we need to avoid the 'Hot' counters of f1 to be the
 // same as f2, because IonMonkey will try to inline f2 in f1, and not
 // compiling/calling f2 separately. This explain why we ignore the 5 first call
 // of f1 by returning immediately.
 //
 // Bailouts are caused by calling an object function, which is expected to be a
 // function by IonMonkey.  So bailout() cause a bailout in the currently
 // compiled function.
 //
 // To avoid any preventive effect to re-enter f2, we re-evaluate it before every
 // test.
 // Check bailouts of the initial frame.
 eval(restartCode);
 while (counter++ < 50) {
     o = f2();
     assertEq(o.length, 0);
 }
 eval(restartCode);
 while (counter++ < 50) {
     o = f2(21);
     assertEq(o.length, 1);
     assertEq(o[0], 21);
 }
 eval(restartCode);
 while (counter++ < 50) {
     o = f2(21,42);
     assertEq(o.length, 2);
     assertEq(o[0], 21);
     assertEq(o[1], 42);
 }
 // 100 arguments.
 eval(restartCode);
 while (counter++ < 50) {
     o = f2(0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9);
     assertEq(o.length, 100);
     for (var i in o)
         assertEq(o[i], i % 10);
 }
 // 200 arguments.
 eval(restartCode);
 while (counter++ < 50) {
     o = f2(0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9);
     assertEq(o.length, 200);
     for (var i in o)
         assertEq(o[i], i % 10);
 }
 // 300 arguments.
 eval(restartCode);
 while (counter++ < 50) {
     o = f2(0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9);
     assertEq(o.length, 300);
     for (var i in o)
         assertEq(o[i], i % 10);
 }
 // Check bailouts of one frame which is not the initial frame.
 eval(restartCode);
 f1 = function() {
     if (counter < 5) return 0;
     return f2();
 };
 while (counter++ < 50) {
     o = f1();
     if (counter < 5) continue;
     assertEq(o.length, 0);
 }
 eval(restartCode);
 f1 = function() {
     if (counter < 5) return 0;
     return f2(21);
 };
 while (counter++ < 50) {
     o = f1();
     if (counter < 5) continue;
     assertEq(o.length, 1);
     assertEq(o[0], 21);
 }
 eval(restartCode);
 f1 = function() {
     if (counter < 5) return 0;
     return f2(21,42);
 };
 while (counter++ < 50) {
     o = f1();
     if (counter < 5) continue;
     assertEq(o.length, 2);
     assertEq(o[0], 21);
     assertEq(o[1], 42);
 }
 // 100 arguments.
 eval(restartCode);
 f1 = function() {
     if (counter < 5) return 0;
     return f2(0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9);
 };
 while (counter++ < 50) {
     o = f1();
     if (counter < 5) continue;
     assertEq(o.length, 100);
     for (var i in o)
         assertEq(o[i], i % 10);
 }
 // 200 arguments.
 eval(restartCode);
 f1 = function() {
     if (counter < 5) return 0;
     return f2(0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9);
 };
 while (counter++ < 50) {
     o = f1();
     if (counter < 5) continue;
     assertEq(o.length, 200);
     for (var i in o)
         assertEq(o[i], i % 10);
 }
 // 300 arguments.
 eval(restartCode);
 f1 = function() {
   if (counter < 5) return 0;
   return f2(0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,
 ,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9);
 };
 while (counter++ < 500) {
     o = f1();
     if (counter < 5) continue;
     assertEq(o.length, 300);
     for (var i in o)
         assertEq(o[i], i % 10);
 }