The Tor Browser: js/src/jsapi-tests/testConservativeGC.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 #if !defined(JSGC_USE_EXACT_ROOTING)

     7 #include "jsobj.h"

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

    10 #include "vm/String.h"

    12 BEGIN_TEST(testConservativeGC)

    13 {

    14     JS::RootedValue v2(cx);

    15     EVAL("({foo: 'bar'});", &v2);

    16     CHECK(v2.isObject());

    17     char objCopy[sizeof(JSObject)];

    18     js_memcpy(&objCopy, JSVAL_TO_OBJECT(v2), sizeof(JSObject));

    20     JS::RootedValue v3(cx);

    21     EVAL("String(Math.PI);", &v3);

    22     CHECK(JSVAL_IS_STRING(v3));

    23     char strCopy[sizeof(JSString)];

    24     js_memcpy(&strCopy, JSVAL_TO_STRING(v3), sizeof(JSString));

    26     JS::RootedValue tmp(cx);

    27     EVAL("({foo2: 'bar2'});", &tmp);

    28     CHECK(tmp.isObject());

    29     JS::RootedObject obj2(cx, JSVAL_TO_OBJECT(tmp));

    30     char obj2Copy[sizeof(JSObject)];

    31     js_memcpy(&obj2Copy, obj2, sizeof(JSObject));

    33     EVAL("String(Math.sqrt(3));", &tmp);

    34     CHECK(JSVAL_IS_STRING(tmp));

    35     JS::RootedString str2(cx, JSVAL_TO_STRING(tmp));

    36     char str2Copy[sizeof(JSString)];

    37     js_memcpy(&str2Copy, str2, sizeof(JSString));

    39     tmp = JSVAL_NULL;

    41     JS_GC(rt);

    43     EVAL("var a = [];\n"

    44          "for (var i = 0; i != 10000; ++i) {\n"

    45          "a.push(i + 0.1, [1, 2], String(Math.sqrt(i)), {a: i});\n"

    46          "}", &tmp);

    48     JS_GC(rt);

    50     checkObjectFields((JSObject *)objCopy, JSVAL_TO_OBJECT(v2));

    51     CHECK(!memcmp(strCopy, JSVAL_TO_STRING(v3), sizeof(strCopy)));

    53     checkObjectFields((JSObject *)obj2Copy, obj2);

    54     CHECK(!memcmp(str2Copy, str2, sizeof(str2Copy)));

    56     return true;

    57 }

    59 bool checkObjectFields(JSObject *savedCopy, JSObject *obj)

    60 {

    61     /* Ignore fields which are unstable across GCs. */

    62     CHECK(savedCopy->lastProperty() == obj->lastProperty());

    63     return true;

    64 }

    66 END_TEST(testConservativeGC)

    68 BEGIN_TEST(testDerivedValues)

    69 {

    70   JSString *str = JS_NewStringCopyZ(cx, "once upon a midnight dreary");

    71   JS::Anchor<JSString *> str_anchor(str);

    72   static const jschar expected[] = { 'o', 'n', 'c', 'e' };

    73   const jschar *ch = JS_GetStringCharsZ(cx, str);

    74   str = nullptr;

    76   /* Do a lot of allocation and collection. */

    77   for (int i = 0; i < 3; i++) {

    78     for (int j = 0; j < 1000; j++)

    79       JS_NewStringCopyZ(cx, "as I pondered weak and weary");

    80     JS_GC(rt);

    81   }

    83   CHECK(!memcmp(ch, expected, sizeof(expected)));

    84   return true;

    85 }

    86 END_TEST(testDerivedValues)

    88 #endif /* !defined(JSGC_USE_EXACT_ROOTING) */

The Tor Browser / file revision