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
    58
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