go escape_struct_return 源码
golang escape_struct_return 代码
文件路径：/test/escape_struct_return.go
// errorcheck -0 -m -l
// 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.
// Test escape analysis for function parameters.
package foo
var Ssink *string
type U struct {
_sp *string
_spp **string
}
func A(sp *string, spp **string) U { // ERROR "leaking param: sp to result ~r0 level=0$" "leaking param: spp to result ~r0 level=0$"
return U{sp, spp}
}
func B(spp **string) U { // ERROR "leaking param: spp to result ~r0 level=0$"
return U{*spp, spp}
}
func tA1() {
s := "cat"
sp := &s
spp := &sp
u := A(sp, spp)
_ = u
println(s)
}
func tA2() {
s := "cat"
sp := &s
spp := &sp
u := A(sp, spp)
println(*u._sp)
}
func tA3() {
s := "cat"
sp := &s
spp := &sp
u := A(sp, spp)
println(**u._spp)
}
func tB1() {
s := "cat"
sp := &s
spp := &sp
u := B(spp)
_ = u
println(s)
}
func tB2() {
s := "cat"
sp := &s
spp := &sp
u := B(spp)
println(*u._sp)
}
func tB3() {
s := "cat"
sp := &s
spp := &sp
u := B(spp)
println(**u._spp)
}
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