go/test/uintptrescapes2.go

// errorcheck -0 -m -live

// Copyright 2016 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.

// Test escape analysis and liveness inferred for uintptrescapes functions.

package p

import (
	"unsafe"
)

//go:uintptrescapes
//go:noinline
func F1(a uintptr) {} // ERROR "escaping uintptr"

//go:uintptrescapes
//go:noinline
func F2(a ...uintptr) {} // ERROR "escaping ...uintptr" "a does not escape"

func G() {
	var t int                       // ERROR "moved to heap"
	F1(uintptr(unsafe.Pointer(&t))) // ERROR "live at call to F1: .?autotmp" "&t escapes to heap"
}

func H() {
	var v int                                // ERROR "moved to heap"
	F2(0, 1, uintptr(unsafe.Pointer(&v)), 2) // ERROR "live at call to newobject: .?autotmp" "live at call to F2: .?autotmp" "escapes to heap"
}