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

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

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

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

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

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

     7 /*

     8  * Bug 689101 - jsval is technically a non-POD type because it has a private

     9  * data member. On gcc, this doesn't seem to matter. On MSVC, this prevents

    10  * returning a jsval from a function between C and C++ because it will use a

    11  * retparam in C++ and a direct return value in C.

    12  *

    13  * Bug 712289 - jsval alignment was different on 32-bit platforms between C and

    14  * C++ because the default alignments of js::Value and jsval_layout differ.

    15  */

    17 extern "C" {

    19 extern bool

    20 C_ValueToObject(JSContext *cx, jsval v, JSObject **obj);

    22 extern jsval

    23 C_GetEmptyStringValue(JSContext *cx);

    25 extern size_t

    26 C_jsvalAlignmentTest();

    28 }

    30 BEGIN_TEST(testValueABI_retparam)

    31 {

    32     JS::RootedObject obj(cx, JS::CurrentGlobalOrNull(cx));

    33     jsval v = OBJECT_TO_JSVAL(obj);

    34     obj = nullptr;

    35     CHECK(C_ValueToObject(cx, v, obj.address()));

    36     bool equal;

    37     CHECK(JS_StrictlyEqual(cx, v, OBJECT_TO_JSVAL(obj), &equal));

    38     CHECK(equal);

    40     v = C_GetEmptyStringValue(cx);

    41     CHECK(JSVAL_IS_STRING(v));

    43     return true;

    44 }

    45 END_TEST(testValueABI_retparam)

    47 BEGIN_TEST(testValueABI_alignment)

    48 {

    49     typedef struct { char c; jsval v; } AlignTest;

    50     CHECK(C_jsvalAlignmentTest() == sizeof(AlignTest));

    52     return true;

    53 }

    54 END_TEST(testValueABI_alignment)

The Tor Browser / file revision