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LibJS: Remove Object(Object& prototype) footgun

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This constructor was easily confused with a copy constructor, and it was
possible to accidentally copy-construct Objects in at least one way that
we dicovered (via generic ThrowCompletionOr construction).

This patch adds a mandatory ConstructWithPrototypeTag parameter to the
constructor to disambiguate it.
This commit is contained in:
Andreas Kling
2022-12-14 12:17:58 +01:00
parent 42b5c896e8
commit 4abdb68655
90 changed files with 100 additions and 99 deletions
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Userland/Libraries/LibJS/Runtime/ECMAScriptFunctionObject.cpp
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@@ -208,7 +208,7 @@ ThrowCompletionOr<Object*> ECMAScriptFunctionObject::internal_construct(MarkedVe
// 3. If kind is base, then
if (kind == ConstructorKind::Base) {
// a. Let thisArgument be ? OrdinaryCreateFromConstructor(newTarget, "%Object.prototype%").
this_argument = TRY(ordinary_create_from_constructor<Object>(vm, new_target, &Intrinsics::object_prototype));
this_argument = TRY(ordinary_create_from_constructor<Object>(vm, new_target, &Intrinsics::object_prototype, ConstructWithPrototypeTag::Tag));
}
ExecutionContext callee_context(heap());