testFreshGlobalEvalRedefinition.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-

 * vim: set ts=8 sts=2 et sw=2 tw=80:

*/

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

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

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

#include "mozilla/Utf8.h"  // mozilla::Utf8Unit

#include "js/CompilationAndEvaluation.h"  // JS::Evaluate

#include "js/GlobalObject.h"              // JS_NewGlobalObject

#include "js/PropertyAndElement.h"        // JS_GetProperty

#include "js/SourceText.h"                // JS::Source{Ownership,Text}

#include "jsapi-tests/tests.h"

#include "util/Text.h"

static bool GlobalResolve(JSContext* cx, JS::HandleObject obj, JS::HandleId id,

                          bool* resolvedp) {

  return JS_ResolveStandardClass(cx, obj, id, resolvedp);

BEGIN_TEST(testRedefineGlobalEval) {

  static const JSClassOps clsOps = {

      nullptr,                         // addProperty

      nullptr,                         // delProperty

      nullptr,                         // enumerate

      JS_NewEnumerateStandardClasses,  // newEnumerate

      GlobalResolve,                   // resolve

      nullptr,                         // mayResolve

      nullptr,                         // finalize

      nullptr,                         // call

      nullptr,                         // construct

      JS_GlobalObjectTraceHook,        // trace

};

  static const JSClass cls = {"global", JSCLASS_GLOBAL_FLAGS, &clsOps};

  /* Create the global object. */

  JS::RealmOptions options;

  JS::Rooted<JSObject*> g(

cx,

      JS_NewGlobalObject(cx, &cls, nullptr, JS::FireOnNewGlobalHook, options));

  if (!g) {

    return false;

  JSAutoRealm ar(cx, g);

  JS::Rooted<JS::Value> v(cx);

  CHECK(JS_GetProperty(cx, g, "Object", &v));

  static const char data[] =

      "Object.defineProperty(this, 'eval', { configurable: false });";

  JS::CompileOptions opts(cx);

  JS::SourceText<mozilla::Utf8Unit> srcBuf;

  CHECK(srcBuf.init(cx, data, js_strlen(data), JS::SourceOwnership::Borrowed));

  CHECK(JS::Evaluate(cx, opts.setFileAndLine(__FILE__, __LINE__), srcBuf, &v));

  return true;

END_TEST(testRedefineGlobalEval)