The Tor Browser: js/src/jsapi-tests/testRegExpInstanceProperties.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 "jscompartment.h"

     9 #include "jsgc.h"

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

    12 #include "vm/Shape.h"

    14 BEGIN_TEST(testRegExpInstanceProperties)

    15 {

    16     jsval regexpProtoVal;

    17     EVAL("RegExp.prototype", &regexpProtoVal);

    19     JSObject *regexpProto = JSVAL_TO_OBJECT(regexpProtoVal);

    21     if (!helper(regexpProto))

    22         return false;

    24     JS_GC(cx);

    26     CHECK_EQUAL(regexpProto->compartment()->initialRegExpShape, nullptr);

    28     jsval regexp;

    29     EVAL("/foopy/", &regexp);

    30     JSObject *robj = JSVAL_TO_OBJECT(regexp);

    32     CHECK(robj->lastProperty());

    33     CHECK_EQUAL(robj->compartment()->initialRegExpShape, robj->lastProperty());

    35     return true;

    36 }

    38 /*

    39  * Do this all in a nested function evaluation so as (hopefully) not to get

    40  * screwed up by the conservative stack scanner when GCing.

    41  */

    42 MOZ_NEVER_INLINE bool helper(JSObject *regexpProto)

    43 {

    44     CHECK(!regexpProto->inDictionaryMode());

    46     // Verify the compartment's cached shape is being used by RegExp.prototype.

    47     const js::Shape *shape = regexpProto->lastProperty();

    48     js::AutoShapeRooter root(cx, shape);

    49     for (js::Shape::Range r = shape;

    50          &r.front() != regexpProto->compartment()->initialRegExpShape;

    51          r.popFront())

    52     {

    53          CHECK(!r.empty());

    54     }

    56     JS::RootedValue v(cx, INT_TO_JSVAL(17));

    57     CHECK(JS_SetProperty(cx, regexpProto, "foopy", v));

    58     v = INT_TO_JSVAL(42);

    59     CHECK(JS_SetProperty(cx, regexpProto, "bunky", v));

    60     CHECK(JS_DeleteProperty(cx, regexpProto, "foopy"));

    61     CHECK(regexpProto->inDictionaryMode());

    63     const js::Shape *shape2 = regexpProto->lastProperty();

    64     js::AutoShapeRooter root2(cx, shape2);

    65     js::Shape::Range r2 = shape2;

    66     while (!r2.empty()) {

    67         CHECK(&r2.front() != regexpProto->compartment()->initialRegExpShape);

    68         r2.popFront();

    69     }

    71     return true;

    72 }

    73 END_TEST(testRegExpInstanceProperties)

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