Source file test/escape_sync_atomic.go

     1  // errorcheck -0 -m -l
     2  
     3  // Copyright 2019 The Go Authors. All rights reserved.
     4  // Use of this source code is governed by a BSD-style
     5  // license that can be found in the LICENSE file.
     6  
     7  // Test escape analysis for sync/atomic.
     8  
     9  package escape
    10  
    11  import (
    12  	"sync/atomic"
    13  	"unsafe"
    14  )
    15  
    16  // BAD: should be "leaking param: addr to result ~r1 level=1$".
    17  func LoadPointer(addr *unsafe.Pointer) unsafe.Pointer { // ERROR "leaking param: addr$"
    18  	return atomic.LoadPointer(addr)
    19  }
    20  
    21  var ptr unsafe.Pointer
    22  
    23  func StorePointer() {
    24  	var x int // ERROR "moved to heap: x"
    25  	atomic.StorePointer(&ptr, unsafe.Pointer(&x))
    26  }
    27  
    28  func SwapPointer() {
    29  	var x int // ERROR "moved to heap: x"
    30  	atomic.SwapPointer(&ptr, unsafe.Pointer(&x))
    31  }
    32  
    33  func CompareAndSwapPointer() {
    34  	// BAD: x doesn't need to be heap allocated
    35  	var x int // ERROR "moved to heap: x"
    36  	var y int // ERROR "moved to heap: y"
    37  	atomic.CompareAndSwapPointer(&ptr, unsafe.Pointer(&x), unsafe.Pointer(&y))
    38  }
    39  

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