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/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
*
* Date: 13 Oct 2003
* SUMMARY: Make our f.caller property match IE's wrt f.apply and f.call
* See http://bugzilla.mozilla.org/show_bug.cgi?id=222029
*
* Below, when gg calls f via |f.call|, we have this call chain:
*
* calls calls
* gg() ---------> Function.prototype.call() ---------> f()
*
*
* The question this bug addresses is, "What should we say |f.caller| is?"
*
* Before this fix, SpiderMonkey said it was |Function.prototype.call|.
* After this fix, SpiderMonkey emulates IE and says |gg| instead.
*
*/
//-----------------------------------------------------------------------------
var UBound = 0;
var BUGNUMBER = 222029;
var summary = "Make our f.caller property match IE's wrt f.apply and f.call";
var status = '';
var statusitems = [];
var actual = '';
var actualvalues = [];
var expect= '';
var expectedvalues = [];
/*
* Try to confuse the engine by adding a |p| property to everything!
*/
var p = 'global';
var o = {p:'object'};
function f(obj)
{
return f.caller.p ;
}
/*
* Call |f| directly
*/
function g(obj)
{
var p = 'local';
return f(obj);
}
g.p = "hello";
/*
* Call |f| via |f.call|
*/
function gg(obj)
{
var p = 'local';
return f.call(obj, obj);
}
gg.p = "hello";
/*
* Call |f| via |f.apply|
*/
function ggg(obj)
{
var p = 'local';
return f.apply(obj, [obj]);
}
ggg.p = "hello";
/*
* Shadow |p| on |Function.prototype.call|, |Function.prototype.apply|.
* In Sections 2 and 3 below, we no longer expect to recover this value -
*/
Function.prototype.call.p = "goodbye";
Function.prototype.apply.p = "goodbye";
status = inSection(1);
actual = g(o);
expect = "hello";
addThis();
status = inSection(2);
actual = gg(o);
expect = "hello";
addThis();
status = inSection(3);
actual = ggg(o);
expect = "hello";
addThis();
//-----------------------------------------------------------------------------
test();
//-----------------------------------------------------------------------------
function addThis()
{
statusitems[UBound] = status;
actualvalues[UBound] = actual;
expectedvalues[UBound] = expect;
UBound++;
}
function test()
{
printBugNumber(BUGNUMBER);
printStatus(summary);
for (var i=0; i<UBound; i++)
{
reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);
}
}
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