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[embedded] Handle NULL IVarDestroyers, expand test

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This commit is contained in:
Kuba Mracek
2024-03-26 21:14:21 -07:00
parent b8bd832fba
commit 37d9be636a
3 changed files with 22 additions and 8 deletions
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6
stdlib/public/core/EmbeddedRuntime.swift
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@@ -24,8 +24,8 @@ public struct ClassMetadata {
// There is no way to express the actual calling convention on this
// function (swiftcc with 'self') currently, so let's use UnsafeRawPointer
// and a helper function in C (_swift_embedded_invoke_heap_object_ivardestroyer).
var ivarDestroyer: UnsafeRawPointer
// and a helper function in C (_swift_embedded_invoke_heap_object_optional_ivardestroyer).
var ivarDestroyer: UnsafeRawPointer?
}
public struct HeapObject {
@@ -129,7 +129,7 @@ public func swift_deallocPartialClassInstance(object: Builtin.RawPointer, metada
func swift_deallocPartialClassInstance(object: UnsafeMutablePointer<HeapObject>, metadata: UnsafeMutablePointer<ClassMetadata>, allocatedSize: Int, allocatedAlignMask: Int) {
var classMetadata = _swift_embedded_get_heap_object_metadata_pointer(object).assumingMemoryBound(to: ClassMetadata.self)
while classMetadata != metadata {
_swift_embedded_invoke_heap_object_ivardestroyer(object, classMetadata)
_swift_embedded_invoke_heap_object_optional_ivardestroyer(object, classMetadata)
guard let superclassMetadata = classMetadata.pointee.superclassMetadata else { break }
classMetadata = superclassMetadata
}