1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/js/src/jsapi-tests/testValueABI.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,54 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.6 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +
1.8 +#include "jsapi-tests/tests.h"
1.9 +
1.10 +/*
1.11 + * Bug 689101 - jsval is technically a non-POD type because it has a private
1.12 + * data member. On gcc, this doesn't seem to matter. On MSVC, this prevents
1.13 + * returning a jsval from a function between C and C++ because it will use a
1.14 + * retparam in C++ and a direct return value in C.
1.15 + *
1.16 + * Bug 712289 - jsval alignment was different on 32-bit platforms between C and
1.17 + * C++ because the default alignments of js::Value and jsval_layout differ.
1.18 + */
1.19 +
1.20 +extern "C" {
1.21 +
1.22 +extern bool
1.23 +C_ValueToObject(JSContext *cx, jsval v, JSObject **obj);
1.24 +
1.25 +extern jsval
1.26 +C_GetEmptyStringValue(JSContext *cx);
1.27 +
1.28 +extern size_t
1.29 +C_jsvalAlignmentTest();
1.30 +
1.31 +}
1.32 +
1.33 +BEGIN_TEST(testValueABI_retparam)
1.34 +{
1.35 + JS::RootedObject obj(cx, JS::CurrentGlobalOrNull(cx));
1.36 + jsval v = OBJECT_TO_JSVAL(obj);
1.37 + obj = nullptr;
1.38 + CHECK(C_ValueToObject(cx, v, obj.address()));
1.39 + bool equal;
1.40 + CHECK(JS_StrictlyEqual(cx, v, OBJECT_TO_JSVAL(obj), &equal));
1.41 + CHECK(equal);
1.42 +
1.43 + v = C_GetEmptyStringValue(cx);
1.44 + CHECK(JSVAL_IS_STRING(v));
1.45 +
1.46 + return true;
1.47 +}
1.48 +END_TEST(testValueABI_retparam)
1.49 +
1.50 +BEGIN_TEST(testValueABI_alignment)
1.51 +{
1.52 + typedef struct { char c; jsval v; } AlignTest;
1.53 + CHECK(C_jsvalAlignmentTest() == sizeof(AlignTest));
1.54 +
1.55 + return true;
1.56 +}
1.57 +END_TEST(testValueABI_alignment)
