test/Interpreter/SDK/objc_inner_pointer.swift

// RUN: %target-run-simple-swift | %FileCheck %s
// REQUIRES: executable_test

// REQUIRES: objc_interop

import Foundation

class Canary: NSObject {
  deinit {
    print("died")
  }
}

var CanaryAssocObjectHandle: UInt8 = 0


// Attach an associated object with a loud deinit so we can see that the
// object died.
func hangCanary(_ o: AnyObject) {
  objc_setAssociatedObject(o, &CanaryAssocObjectHandle, Canary(),
                           .OBJC_ASSOCIATION_RETAIN_NONATOMIC)
}

// CHECK-LABEL: NSData:
print("NSData:")
autoreleasepool {
  var bytes: UnsafeMutablePointer<UInt8>
  repeat {
    let data = NSData(bytes: [2, 3, 5, 7] as [UInt8], length: 4)
    hangCanary(data)
    bytes = UnsafeMutablePointer<UInt8>(mutating: data.bytes.assumingMemoryBound(to: UInt8.self))
  } while false // CHECK-NOT: died
  print(bytes[0]) // CHECK:      2
  print(bytes[1]) // CHECK-NEXT: 3
  print(bytes[2]) // CHECK-NEXT: 5
  print(bytes[3]) // CHECK-NEXT: 7
} // CHECK-NEXT: died

// CHECK-LABEL: AnyObject:
print("AnyObject:")
autoreleasepool {
  var bytes: UnsafeMutablePointer<UInt8>
  repeat {
    let data = NSData(bytes: [11, 13, 17, 19] as [UInt8], length: 4)
    hangCanary(data)
    let dataAsAny: AnyObject = data
    bytes = UnsafeMutablePointer<UInt8>(mutating: dataAsAny.bytes!.assumingMemoryBound(to: UInt8.self))
  } while false // CHECK-NOT: died
  print(bytes[0]) // CHECK:      11
  print(bytes[1]) // CHECK-NEXT: 13
  print(bytes[2]) // CHECK-NEXT: 17
  print(bytes[3]) // CHECK-NEXT: 19
} // CHECK-NEXT: died