// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build (darwin && race) || (linux && race) || (freebsd && race)

package unix

import (
	"runtime"
	"unsafe"
)

const raceenabled = true

func raceAcquire(addr unsafe.Pointer) {
	runtime.RaceAcquire(addr)
}

func raceReleaseMerge(addr unsafe.Pointer) {

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build race

package runtime

import (
	"internal/abi"
	"unsafe"
)

// Public race detection API, present iff build with -race.

func RaceRead(addr unsafe.Pointer)
func RaceWrite(addr unsafe.Pointer)
func RaceReadRange(addr unsafe.Pointer, len int)

// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build race

package race

import (
	"runtime"
	"unsafe"
)

const Enabled = true

func Acquire(addr unsafe.Pointer) {
	runtime.RaceAcquire(addr)
}

func Release(addr unsafe.Pointer) {
	runtime.RaceRelease(addr)
}

// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build plan9 && race

package plan9

import (
	"runtime"
	"unsafe"
)

const raceenabled = true

func raceAcquire(addr unsafe.Pointer) {
	runtime.RaceAcquire(addr)
}

func raceReleaseMerge(addr unsafe.Pointer) {
	runtime.RaceReleaseMerge(addr)
}

// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build windows && race

package windows

import (
	"runtime"
	"unsafe"
)

const raceenabled = true

func raceAcquire(addr unsafe.Pointer) {
	runtime.RaceAcquire(addr)
}

func raceReleaseMerge(addr unsafe.Pointer) {
	runtime.RaceReleaseMerge(addr)
}

// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build aix || (darwin && !race) || (linux && !race) || (freebsd && !race) || netbsd || openbsd || solaris || dragonfly || zos

package unix

import (
	"unsafe"
)

const raceenabled = false

func raceAcquire(addr unsafe.Pointer) {
}

		rw.w.Unlock()
		if race.Enabled {
			race.Enable()
		}
		return false
	}
	if race.Enabled {
		race.Enable()
		race.Acquire(unsafe.Pointer(&rw.readerSem))
		race.Acquire(unsafe.Pointer(&rw.writerSem))
	}
	return true
}

// Unlock unlocks rw for writing. It is a run-time error if rw is
// not locked for writing on entry to Unlock.
//

// See the WaitGroup example.
func (wg *WaitGroup) Add(delta int) {
	if race.Enabled {
		if delta < 0 {
			// Synchronize decrements with Wait.
			race.ReleaseMerge(unsafe.Pointer(wg))
		}
		race.Disable()
		defer race.Enable()
	}
	state := wg.state.Add(uint64(delta) << 32)
	v := int32(state >> 32)
	w := uint32(state)
	if race.Enabled && delta > 0 && v == int32(delta) {

# go build -buildmode=pie -race main.go on Darwin should work without errors

[!race] skip 'test requires race detector support'

[!GOOS:darwin] ! go build -buildmode=pie -race
[!GOOS:darwin] stderr '^-buildmode=pie not supported when -race is enabled on '$GOOS'/'$GOARCH'$'
[!GOOS:darwin] stop 'not testing -buildmode=pie -race on platform that does not support it'

go build -buildmode=pie -race bytes
! stderr .

	// reported here (after m.Run but before the process exits), it will print
	// "PASS", then print the stack traces for the race, then exit with nonzero
	// status.
	//
	// This is a somewhat fundamental race: because the race detector hooks into
	// the runtime at a very low level, no matter where we put the printing it
	// would be possible to report a race that occurs afterward. However, we could