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Fixes misaligned pointer by reading from the buffer instead of loading the memory separately (#8649)

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mustiikhalil
2025-07-29 23:26:30 +02:00
committed by GitHub
parent 575d616e60
commit 518bf42df8
2 changed files with 18 additions and 2 deletions
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4
swift/Sources/FlatBuffers/FlatBufferBuilder.swift
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@@ -303,12 +303,12 @@ public struct FlatBufferBuilder {
var isAlreadyAdded: Int?
let vt2 = _bb.memory.advanced(by: _bb.writerIndex)
let len2 = vt2.load(fromByteOffset: 0, as: Int16.self)
let len2 = vt2.bindMemory(to: Int16.self, capacity: 1).pointee
for index in stride(from: 0, to: _vtables.count, by: 1) {
let position = _bb.capacity &- Int(_vtables[index])
let vt1 = _bb.memory.advanced(by: position)
let len1 = _bb.read(def: Int16.self, position: position)
let len1 = vt1.bindMemory(to: Int16.self, capacity: 1).pointee
if len2 != len1 || 0 != memcmp(vt1, vt2, Int(len2)) { continue }
isAlreadyAdded = Int(_vtables[index])