The Tor Browser: js/src/jsapi-tests/testAddPropertyPropcache.cpp@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-

     2  * vim: set ts=8 sts=4 et sw=4 tw=99:

     3  */

     4 /* This Source Code Form is subject to the terms of the Mozilla Public

     5  * License, v. 2.0. If a copy of the MPL was not distributed with this

     6  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     8 #include "jsapi-tests/tests.h"

    10 static int callCount = 0;

    12 static bool

    13 AddProperty(JSContext *cx, JS::HandleObject obj, JS::HandleId id, JS::MutableHandleValue vp)

    14 {

    15     callCount++;

    16     return true;

    17 }

    19 static const JSClass AddPropertyClass = {

    20     "AddPropertyTester",

    21     0,

    22     AddProperty,

    23     JS_DeletePropertyStub,   /* delProperty */

    24     JS_PropertyStub,         /* getProperty */

    25     JS_StrictPropertyStub,   /* setProperty */

    26     JS_EnumerateStub,

    27     JS_ResolveStub,

    28     JS_ConvertStub

    29 };

    31 BEGIN_TEST(testAddPropertyHook)

    32 {

    33     /*

    34      * Do the test a bunch of times, because sometimes we seem to randomly

    35      * miss the propcache.

    36      */

    37     static const int ExpectedCount = 100;

    39     JS::RootedObject obj(cx, JS_NewObject(cx, nullptr, JS::NullPtr(), JS::NullPtr()));

    40     CHECK(obj);

    41     JS::RootedValue proto(cx, OBJECT_TO_JSVAL(obj));

    42     JS_InitClass(cx, global, obj, &AddPropertyClass, nullptr, 0, nullptr, nullptr, nullptr,

    43                  nullptr);

    45     obj = JS_NewArrayObject(cx, 0);

    46     CHECK(obj);

    47     JS::RootedValue arr(cx, OBJECT_TO_JSVAL(obj));

    49     CHECK(JS_DefineProperty(cx, global, "arr", arr, JSPROP_ENUMERATE,

    50                             JS_PropertyStub, JS_StrictPropertyStub));

    52     for (int i = 0; i < ExpectedCount; ++i) {

    53         obj = JS_NewObject(cx, &AddPropertyClass, JS::NullPtr(), JS::NullPtr());

    54         CHECK(obj);

    55         JS::RootedValue vobj(cx, OBJECT_TO_JSVAL(obj));

    56         JS::RootedObject arrObj(cx, JSVAL_TO_OBJECT(arr));

    57         CHECK(JS_DefineElement(cx, arrObj, i, vobj,

    58                                JS_PropertyStub, JS_StrictPropertyStub,

    59                                JSPROP_ENUMERATE));

    60     }

    62     // Now add a prop to each of the objects, but make sure to do

    63     // so at the same bytecode location so we can hit the propcache.

    64     EXEC("'use strict';                                     \n"

    65          "for (var i = 0; i < arr.length; ++i)              \n"

    66          "  arr[i].prop = 42;                               \n"

    67          );

    69     CHECK(callCount == ExpectedCount);

    71     return true;

    72 }

    73 END_TEST(testAddPropertyHook)

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