misc/cgo/test/issue21897.go

   1 // Copyright 2017 The Go Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style
   3 // license that can be found in the LICENSE file.
   4
   5 //go:build darwin && cgo && !internal
   6 // +build darwin,cgo,!internal
   7
   8 package cgotest
   9
  10 /*
  11 #cgo LDFLAGS: -framework CoreFoundation
  12 #include <CoreFoundation/CoreFoundation.h>
  13 */
  14 import "C"
  15 import (
  16         "runtime/debug"
  17         "testing"
  18         "unsafe"
  19 )
  20
  21 func test21897(t *testing.T) {
  22         // Please write barrier, kick in soon.
  23         defer debug.SetGCPercent(debug.SetGCPercent(1))
  24
  25         for i := 0; i < 10000; i++ {
  26                 testCFNumberRef()
  27                 testCFDateRef()
  28                 testCFBooleanRef()
  29                 // Allocate some memory, so eventually the write barrier is enabled
  30                 // and it will see writes of bad pointers in the test* functions below.
  31                 byteSliceSink = make([]byte, 1024)
  32         }
  33 }
  34
  35 var byteSliceSink []byte
  36
  37 func testCFNumberRef() {
  38         var v int64 = 0
  39         xCFNumberRef = C.CFNumberCreate(C.kCFAllocatorSystemDefault, C.kCFNumberSInt64Type, unsafe.Pointer(&v))
  40         //fmt.Printf("CFNumberRef: %x\n", uintptr(unsafe.Pointer(xCFNumberRef)))
  41 }
  42
  43 var xCFNumberRef C.CFNumberRef
  44
  45 func testCFDateRef() {
  46         xCFDateRef = C.CFDateCreate(C.kCFAllocatorSystemDefault, 0) // 0 value is 1 Jan 2001 00:00:00 GMT
  47         //fmt.Printf("CFDateRef: %x\n", uintptr(unsafe.Pointer(xCFDateRef)))
  48 }
  49
  50 var xCFDateRef C.CFDateRef
  51
  52 func testCFBooleanRef() {
  53         xCFBooleanRef = C.kCFBooleanFalse
  54         //fmt.Printf("CFBooleanRef: %x\n", uintptr(unsafe.Pointer(xCFBooleanRef)))
  55 }
  56
  57 var xCFBooleanRef C.CFBooleanRef