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// 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 when assigning to indirections.
package escape
var sink interface{}
type ConstPtr struct {
p *int
c ConstPtr2
x **ConstPtr
}
type ConstPtr2 struct {
p *int
i int
}
func constptr0() {
i := 0 // ERROR "moved to heap: i"
x := &ConstPtr{} // ERROR "&ConstPtr{} does not escape"
// BAD: i should not escape here
x.p = &i
_ = x
}
func constptr01() *ConstPtr {
i := 0 // ERROR "moved to heap: i"
x := &ConstPtr{} // ERROR "&ConstPtr{} escapes to heap"
x.p = &i
return x
}
func constptr02() ConstPtr {
i := 0 // ERROR "moved to heap: i"
x := &ConstPtr{} // ERROR "&ConstPtr{} does not escape"
x.p = &i
return *x
}
func constptr03() **ConstPtr {
i := 0 // ERROR "moved to heap: i"
x := &ConstPtr{} // ERROR "&ConstPtr{} escapes to heap" "moved to heap: x"
x.p = &i
return &x
}
func constptr1() {
i := 0 // ERROR "moved to heap: i"
x := &ConstPtr{} // ERROR "&ConstPtr{} escapes to heap"
x.p = &i
sink = x
}
func constptr2() {
i := 0 // ERROR "moved to heap: i"
x := &ConstPtr{} // ERROR "&ConstPtr{} does not escape"
x.p = &i
sink = *x // ERROR "\*x escapes to heap"
}
func constptr4() *ConstPtr {
p := new(ConstPtr) // ERROR "new\(ConstPtr\) escapes to heap"
*p = *&ConstPtr{} // ERROR "&ConstPtr{} does not escape"
return p
}
func constptr5() *ConstPtr {
p := new(ConstPtr) // ERROR "new\(ConstPtr\) escapes to heap"
p1 := &ConstPtr{} // ERROR "&ConstPtr{} does not escape"
*p = *p1
return p
}
// BAD: p should not escape here
func constptr6(p *ConstPtr) { // ERROR "leaking param content: p"
p1 := &ConstPtr{} // ERROR "&ConstPtr{} does not escape"
*p1 = *p
_ = p1
}
func constptr7() **ConstPtr {
p := new(ConstPtr) // ERROR "new\(ConstPtr\) escapes to heap" "moved to heap: p"
var tmp ConstPtr2
p1 := &tmp
p.c = *p1
return &p
}
func constptr8() *ConstPtr {
p := new(ConstPtr) // ERROR "new\(ConstPtr\) escapes to heap"
var tmp ConstPtr2
p.c = *&tmp
return p
}
func constptr9() ConstPtr {
p := new(ConstPtr) // ERROR "new\(ConstPtr\) does not escape"
var p1 ConstPtr2
i := 0 // ERROR "moved to heap: i"
p1.p = &i
p.c = p1
return *p
}
func constptr10() ConstPtr {
x := &ConstPtr{} // ERROR "moved to heap: x" "&ConstPtr{} escapes to heap"
i := 0 // ERROR "moved to heap: i"
var p *ConstPtr
p = &ConstPtr{p: &i, x: &x} // ERROR "&ConstPtr{...} does not escape"
var pp **ConstPtr
pp = &p
return **pp
}
func constptr11() *ConstPtr {
i := 0 // ERROR "moved to heap: i"
p := new(ConstPtr) // ERROR "new\(ConstPtr\) escapes to heap"
p1 := &ConstPtr{} // ERROR "&ConstPtr{} does not escape"
p1.p = &i
*p = *p1
return p
}
func foo(p **int) { // ERROR "p does not escape"
i := 0 // ERROR "moved to heap: i"
y := p
*y = &i
}
func foo1(p *int) { // ERROR "p does not escape"
i := 0 // ERROR "moved to heap: i"
y := &p
*y = &i
}
func foo2() {
type Z struct {
f **int
}
x := new(int) // ERROR "moved to heap: x" "new\(int\) escapes to heap"
sink = &x
var z Z
z.f = &x
p := z.f
i := 0 // ERROR "moved to heap: i"
*p = &i
}
var global *byte
func f() {
var x byte // ERROR "moved to heap: x"
global = &*&x
}