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[embedded] Fix arm64e pointer signing in embedded heap object destruction

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This commit is contained in:
Kuba Mracek
2023-09-26 12:30:21 -07:00
parent e4dc6271f1
commit b718c506da
2 changed files with 9 additions and 4 deletions
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11
stdlib/public/SwiftShims/swift/shims/EmbeddedShims.h
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@@ -33,9 +33,14 @@ extern "C" {
typedef void SWIFT_CC (*HeapObjectDestroyer)(SWIFT_CONTEXT void *object);
static inline void _swift_runtime_invoke_heap_object_destroy(
const void *destroy, void *self) {
((HeapObjectDestroyer)destroy)(self);
static inline void _swift_embedded_invoke_heap_object_destroy(void *object) {
void *metadata = *(void **)object;
void **destroy_location = &((void **)metadata)[1];
#if __has_feature(ptrauth_calls)
(*(__ptrauth(0,1,0xbbbf) HeapObjectDestroyer *)destroy_location)(object);
#else
(*(HeapObjectDestroyer *)destroy_location)(object);
#endif
}
#ifdef __cplusplus

2
stdlib/public/core/EmbeddedRuntime.swift
View File

@@ -117,7 +117,7 @@ public func swift_release(object: Builtin.RawPointer) {
if o.pointee.refcount == HeapObject.immortalRefCount { return }
o.pointee.refcount -= 1
if (o.pointee.refcount & HeapObject.refcountMask) == 0 {
_swift_runtime_invoke_heap_object_destroy(o.pointee.metadata.pointee.destroy, o)
_swift_embedded_invoke_heap_object_destroy(o)
}
}