testValueABI.cpp (1516B)
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/. */ 4 5 #include "js/GlobalObject.h" 6 #include "jsapi-tests/tests.h" 7 8 /* 9 * Bug 689101 - jsval is technically a non-POD type because it has a private 10 * data member. On gcc, this doesn't seem to matter. On MSVC, this prevents 11 * returning a jsval from a function between C and C++ because it will use a 12 * retparam in C++ and a direct return value in C. 13 * 14 * Bug 712289 - jsval alignment was different on 32-bit platforms between C and 15 * C++ because the default alignments of js::Value and jsval_layout differ. 16 */ 17 18 extern "C" { 19 20 extern bool C_ValueToObject(JSContext* cx, jsval v, JSObject** obj); 21 22 extern jsval C_GetEmptyStringValue(JSContext* cx); 23 24 extern size_t C_jsvalAlignmentTest(); 25 } 26 27 BEGIN_TEST(testValueABI_retparam) { 28 JS::RootedObject obj(cx, JS::CurrentGlobalOrNull(cx)); 29 RootedValue v(cx, ObjectValue(*obj)); 30 obj = nullptr; 31 CHECK(C_ValueToObject(cx, v, obj.address())); 32 bool equal; 33 RootedValue v2(cx, ObjectValue(*obj)); 34 CHECK(JS_StrictlyEqual(cx, v, v2, &equal)); 35 CHECK(equal); 36 37 v = C_GetEmptyStringValue(cx); 38 CHECK(v.isString()); 39 40 return true; 41 } 42 END_TEST(testValueABI_retparam) 43 44 BEGIN_TEST(testValueABI_alignment) { 45 typedef struct { 46 char c; 47 jsval v; 48 } AlignTest; 49 CHECK(C_jsvalAlignmentTest() == sizeof(AlignTest)); 50 51 return true; 52 } 53 END_TEST(testValueABI_alignment)