issue21897.go

Documentation: cmd/cgo/internal/test

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