std.math.big.int: breaking API changes to prevent UAF #11964
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Many of the Managed methods accepted by-val parameters which could reference Limb slices that became invalid memory after any ensureCapacity calls. Now, Managed methods accept `*const Managed` parameters so that if the function allows aliasing and the ensure-capacity call resizes the Limb slice, it also affects the aliased parameters, avoiding use-after-free bugs. This is a breaking change that reduces the requirement for callsites to manually make the ensure-capacity changes prior to calling many of the Managed methods. Closes #11897
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| @@ -2660,57 +2660,56 @@ pub const Managed = struct { | |||
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| /// r = a + scalar | |||
| /// | |||
| /// r and a may be aliases. If r aliases a, then caller must call | |||
| /// `r.ensureAddScalarCapacity` prior to calling `add`. | |||
| /// scalar is a primitive integer type. | |||
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Intended. It was replaced with the sentence " r and a may be aliases". The other part is no longer a requirement of the caller.
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So scalar can now be something else than a primitive integer type?
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Many of the Managed methods accepted by-val parameters which could
reference Limb slices that became invalid memory after any
ensureCapacity calls. Now, Managed methods accept
*const Managedparameters so that if the function allows aliasing and the
ensure-capacity call resizes the Limb slice, it also affects the
aliased parameters, avoiding use-after-free bugs.
This is a breaking change that reduces the requirement for callsites to
manually make the ensure-capacity changes prior to calling many of the
Managed methods.
Closes #11897