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lib: make safe primordials safe to construct
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PR-URL: #36428
Reviewed-By: Rich Trott <rtrott@gmail.com>
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aduh95 authored and targos committed Jun 11, 2021
1 parent 7ebc18f commit bf0738b
Showing 1 changed file with 14 additions and 4 deletions.
18 changes: 14 additions & 4 deletions lib/internal/per_context/primordials.js
Expand Up @@ -146,21 +146,31 @@ primordials.makeSafe = makeSafe;

// Subclass the constructors because we need to use their prototype
// methods later.
// Defining the `constructor` is necessary here to avoid the default
// constructor which uses the user-mutable `%ArrayIteratorPrototype%.next`.
primordials.SafeMap = makeSafe(
Map,
class SafeMap extends Map {}
class SafeMap extends Map {
constructor(i) { super(i); } // eslint-disable-line no-useless-constructor
}
);
primordials.SafeWeakMap = makeSafe(
WeakMap,
class SafeWeakMap extends WeakMap {}
class SafeWeakMap extends WeakMap {
constructor(i) { super(i); } // eslint-disable-line no-useless-constructor
}
);
primordials.SafeSet = makeSafe(
Set,
class SafeSet extends Set {}
class SafeSet extends Set {
constructor(i) { super(i); } // eslint-disable-line no-useless-constructor
}
);
primordials.SafeWeakSet = makeSafe(
WeakSet,
class SafeWeakSet extends WeakSet {}
class SafeWeakSet extends WeakSet {
constructor(i) { super(i); } // eslint-disable-line no-useless-constructor
}
);

// Create copies of the namespace objects
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