mirror of
https://github.com/golang/go
synced 2024-09-05 16:04:50 +00:00
![Cuong Manh Le](/assets/img/avatar_default.png)
This CL changes "T literal.M" error message to "T{...}.M". It's clearer expression and focusing user on actual issue. Updates #38745 Change-Id: I84b455a86742f37e0bde5bf390aa02984eecc3c9 Reviewed-on: https://go-review.googlesource.com/c/go/+/253677 Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com>
161 lines
3.3 KiB
Go
161 lines
3.3 KiB
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 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
|
|
}
|