go uintptrescapes2 源码
golang uintptrescapes2 代码
文件路径：/test/uintptrescapes2.go
// errorcheck -0 -l -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
func F1(a uintptr) {} // ERROR "escaping uintptr"
//go:uintptrescapes
func F2(a ...uintptr) {} // ERROR "escaping ...uintptr"
//go:uintptrescapes
func F3(uintptr) {} // ERROR "escaping uintptr"
//go:uintptrescapes
func F4(...uintptr) {} // ERROR "escaping ...uintptr"
type T struct{}
//go:uintptrescapes
func (T) M1(a uintptr) {} // ERROR "escaping uintptr"
//go:uintptrescapes
func (T) M2(a ...uintptr) {} // ERROR "escaping ...uintptr"
func TestF1() {
var t int // ERROR "moved to heap"
F1(uintptr(unsafe.Pointer(&t))) // ERROR "live at call to F1: .?autotmp" "stack object .autotmp_[0-9]+ unsafe.Pointer$"
}
func TestF3() {
var t2 int // ERROR "moved to heap"
F3(uintptr(unsafe.Pointer(&t2))) // ERROR "live at call to F3: .?autotmp" "stack object .autotmp_[0-9]+ unsafe.Pointer$"
}
func TestM1() {
var t T
var v int // ERROR "moved to heap"
t.M1(uintptr(unsafe.Pointer(&v))) // ERROR "live at call to T.M1: .?autotmp" "stack object .autotmp_[0-9]+ unsafe.Pointer$"
}
func TestF2() {
var v int // ERROR "moved to heap"
F2(0, 1, uintptr(unsafe.Pointer(&v)), 2) // ERROR "live at call to newobject: .?autotmp" "live at call to F2: .?autotmp" "escapes to heap" "stack object .autotmp_[0-9]+ unsafe.Pointer$"
}
func TestF4() {
var v2 int // ERROR "moved to heap"
F4(0, 1, uintptr(unsafe.Pointer(&v2)), 2) // ERROR "live at call to newobject: .?autotmp" "live at call to F4: .?autotmp" "escapes to heap" "stack object .autotmp_[0-9]+ unsafe.Pointer$"
}
func TestM2() {
var t T
var v int // ERROR "moved to heap"
t.M2(0, 1, uintptr(unsafe.Pointer(&v)), 2) // ERROR "live at call to newobject: .?autotmp" "live at call to T.M2: .?autotmp" "escapes to heap" "stack object .autotmp_[0-9]+ unsafe.Pointer$"
}
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