WebKit/Source/JavaScriptCore/builtins/ShadowRealmPrototype.js at main · WebKit/WebKit · GitHub

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* Redistribution and use in source and binary forms, with or without

* modification, are permitted provided that the following conditions

* are met:

* 1. Redistributions of source code must retain the above copyright

* notice, this list of conditions and the following disclaimer.

* 2. Redistributions in binary form must reproduce the above copyright

* notice, this list of conditions and the following disclaimer in the

* documentation and/or other materials provided with the distribution.

* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''

* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS

* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF

* THE POSSIBILITY OF SUCH DAMAGE.

// Wrap a value at the boundary between the incubating realm and `shadowRealm`:

// if `fromShadowRealm` is false, we are wrapping an object from the incubating

// realm; if true, we are wrapping an object from the shadow realm

@linkTimeConstant

function wrapRemoteValue(fromShadowRealm, shadowRealm, target)

{

"use strict";

if (@isCallable(target))

return @createRemoteFunction(target, fromShadowRealm ? null : shadowRealm);

if (@isObject(target))

@throwTypeError("value passing between realms must be callable or primitive");

return target;

}

function evaluate(sourceText)

{

"use strict";

if (!@isShadowRealm(this))

@throwTypeError("`%ShadowRealm%.evaluate requires that |this| be a ShadowRealm instance");

if (typeof sourceText !== 'string')

@throwTypeError("`%ShadowRealm%.evaluate requires that the |sourceText| argument be a string");

return @wrapRemoteValue(true, this, @evalInRealm(this, sourceText));

}

@linkTimeConstant

function crossRealmThrow(error)

{

"use strict";

// re-throw because import issues raise errors using the realm's global object

@throwTypeError(@toString(error));

}

function importValue(specifier, exportName)

{

"use strict";

if (!@isShadowRealm(this))

@throwTypeError("`%ShadowRealm%.importValue requires that |this| be a ShadowRealm instance");

var specifierString = @toString(specifier);

if (typeof exportName !== 'string')

@throwTypeError("`%ShadowRealm%.importValue requires that the |exportName| argument be a string");

var lookupBinding = (module) => {

var lookup = module[exportName]

if (lookup === @undefined)

@throwTypeError("%ShadowRealm%.importValue requires |exportName| to exist in the |specifier|");

return @wrapRemoteValue(true, this, lookup);

};

return @importInRealm(this, specifierString).@then(lookupBinding, @crossRealmThrow);

}

WebKit/Source/JavaScriptCore/builtins/ShadowRealmPrototype.js at main · WebKit/WebKit · GitHub

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