mirror of
https://github.com/golang/go
synced 2024-11-02 08:01:26 +00:00
1b87f01239
Currently all PTRLIT element initializers escape. There is no reason for that. This change links STRUCTLIT to PTRLIT; STRUCTLIT element initializers are already linked to the STRUCTLIT. As the result, PTRLIT element initializers escape when PTRLIT itself escapes. Change-Id: I89ecd8677cbf81addcfd469cd2fd461c0e9bf7dd Reviewed-on: https://go-review.googlesource.com/3031 Reviewed-by: Russ Cox <rsc@golang.org>
1521 lines
29 KiB
Go
1521 lines
29 KiB
Go
// errorcheck -0 -m -l
|
|
|
|
// Copyright 2010 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, using compiler diagnostic flags, that the escape analysis is working.
|
|
// Compiles but does not run. Inlining is disabled.
|
|
|
|
// escape2n.go contains all the same tests but compiles with -N.
|
|
|
|
package foo
|
|
|
|
import (
|
|
"fmt"
|
|
"unsafe"
|
|
)
|
|
|
|
var gxx *int
|
|
|
|
func foo1(x int) { // ERROR "moved to heap: x"
|
|
gxx = &x // ERROR "&x escapes to heap"
|
|
}
|
|
|
|
func foo2(yy *int) { // ERROR "leaking param: yy"
|
|
gxx = yy
|
|
}
|
|
|
|
func foo3(x int) *int { // ERROR "moved to heap: x"
|
|
return &x // ERROR "&x escapes to heap"
|
|
}
|
|
|
|
type T *T
|
|
|
|
func foo3b(t T) { // ERROR "leaking param: t"
|
|
*t = t
|
|
}
|
|
|
|
// xx isn't going anywhere, so use of yy is ok
|
|
func foo4(xx, yy *int) { // ERROR "xx does not escape" "yy does not escape"
|
|
xx = yy
|
|
}
|
|
|
|
// xx isn't going anywhere, so taking address of yy is ok
|
|
func foo5(xx **int, yy *int) { // ERROR "xx does not escape" "yy does not escape"
|
|
xx = &yy // ERROR "&yy does not escape"
|
|
}
|
|
|
|
func foo6(xx **int, yy *int) { // ERROR "xx does not escape" "leaking param: yy"
|
|
*xx = yy
|
|
}
|
|
|
|
func foo7(xx **int, yy *int) { // ERROR "xx does not escape" "yy does not escape"
|
|
**xx = *yy
|
|
}
|
|
|
|
func foo8(xx, yy *int) int { // ERROR "xx does not escape" "yy does not escape"
|
|
xx = yy
|
|
return *xx
|
|
}
|
|
|
|
func foo9(xx, yy *int) *int { // ERROR "leaking param: xx" "leaking param: yy"
|
|
xx = yy
|
|
return xx
|
|
}
|
|
|
|
func foo10(xx, yy *int) { // ERROR "xx does not escape" "yy does not escape"
|
|
*xx = *yy
|
|
}
|
|
|
|
func foo11() int {
|
|
x, y := 0, 42
|
|
xx := &x // ERROR "&x does not escape"
|
|
yy := &y // ERROR "&y does not escape"
|
|
*xx = *yy
|
|
return x
|
|
}
|
|
|
|
var xxx **int
|
|
|
|
func foo12(yyy **int) { // ERROR "leaking param: yyy"
|
|
xxx = yyy
|
|
}
|
|
|
|
// Must treat yyy as leaking because *yyy leaks, and the escape analysis
|
|
// summaries in exported metadata do not distinguish these two cases.
|
|
func foo13(yyy **int) { // ERROR "leaking param: yyy"
|
|
*xxx = *yyy
|
|
}
|
|
|
|
func foo14(yyy **int) { // ERROR "yyy does not escape"
|
|
**xxx = **yyy
|
|
}
|
|
|
|
func foo15(yy *int) { // ERROR "moved to heap: yy"
|
|
xxx = &yy // ERROR "&yy escapes to heap"
|
|
}
|
|
|
|
func foo16(yy *int) { // ERROR "leaking param: yy"
|
|
*xxx = yy
|
|
}
|
|
|
|
func foo17(yy *int) { // ERROR "yy does not escape"
|
|
**xxx = *yy
|
|
}
|
|
|
|
func foo18(y int) { // ERROR "moved to heap: "y"
|
|
*xxx = &y // ERROR "&y escapes to heap"
|
|
}
|
|
|
|
func foo19(y int) {
|
|
**xxx = y
|
|
}
|
|
|
|
type Bar struct {
|
|
i int
|
|
ii *int
|
|
}
|
|
|
|
func NewBar() *Bar {
|
|
return &Bar{42, nil} // ERROR "&Bar literal escapes to heap"
|
|
}
|
|
|
|
func NewBarp(x *int) *Bar { // ERROR "leaking param: x"
|
|
return &Bar{42, x} // ERROR "&Bar literal escapes to heap"
|
|
}
|
|
|
|
func NewBarp2(x *int) *Bar { // ERROR "x does not escape"
|
|
return &Bar{*x, nil} // ERROR "&Bar literal escapes to heap"
|
|
}
|
|
|
|
func (b *Bar) NoLeak() int { // ERROR "b does not escape"
|
|
return *(b.ii)
|
|
}
|
|
|
|
func (b *Bar) Leak() *int { // ERROR "leaking param: b"
|
|
return &b.i // ERROR "&b.i escapes to heap"
|
|
}
|
|
|
|
func (b *Bar) AlsoNoLeak() *int { // ERROR "leaking param b content to result ~r0"
|
|
return b.ii
|
|
}
|
|
|
|
func (b Bar) AlsoLeak() *int { // ERROR "leaking param: b"
|
|
return b.ii
|
|
}
|
|
|
|
func (b Bar) LeaksToo() *int { // ERROR "leaking param: b"
|
|
v := 0 // ERROR "moved to heap: v"
|
|
b.ii = &v // ERROR "&v escapes"
|
|
return b.ii
|
|
}
|
|
|
|
func (b *Bar) LeaksABit() *int { // ERROR "leaking param b content to result ~r0"
|
|
v := 0 // ERROR "moved to heap: v"
|
|
b.ii = &v // ERROR "&v escapes"
|
|
return b.ii
|
|
}
|
|
|
|
func (b Bar) StillNoLeak() int { // ERROR "b does not escape"
|
|
v := 0
|
|
b.ii = &v // ERROR "&v does not escape"
|
|
return b.i
|
|
}
|
|
|
|
func goLeak(b *Bar) { // ERROR "leaking param: b"
|
|
go b.NoLeak()
|
|
}
|
|
|
|
type Bar2 struct {
|
|
i [12]int
|
|
ii []int
|
|
}
|
|
|
|
func NewBar2() *Bar2 {
|
|
return &Bar2{[12]int{42}, nil} // ERROR "&Bar2 literal escapes to heap"
|
|
}
|
|
|
|
func (b *Bar2) NoLeak() int { // ERROR "b does not escape"
|
|
return b.i[0]
|
|
}
|
|
|
|
func (b *Bar2) Leak() []int { // ERROR "leaking param: b"
|
|
return b.i[:] // ERROR "b.i escapes to heap"
|
|
}
|
|
|
|
func (b *Bar2) AlsoNoLeak() []int { // ERROR "leaking param b content to result ~r0"
|
|
return b.ii[0:1]
|
|
}
|
|
|
|
func (b Bar2) AgainNoLeak() [12]int { // ERROR "b does not escape"
|
|
return b.i
|
|
}
|
|
|
|
func (b *Bar2) LeakSelf() { // ERROR "leaking param: b"
|
|
b.ii = b.i[0:4] // ERROR "b.i escapes to heap"
|
|
}
|
|
|
|
func (b *Bar2) LeakSelf2() { // ERROR "leaking param: b"
|
|
var buf []int
|
|
buf = b.i[0:] // ERROR "b.i escapes to heap"
|
|
b.ii = buf
|
|
}
|
|
|
|
func foo21() func() int {
|
|
x := 42 // ERROR "moved to heap: x"
|
|
return func() int { // ERROR "func literal escapes to heap"
|
|
return x // ERROR "&x escapes to heap"
|
|
}
|
|
}
|
|
|
|
func foo22() int {
|
|
x := 42
|
|
return func() int { // ERROR "func literal does not escape"
|
|
return x
|
|
}()
|
|
}
|
|
|
|
func foo23(x int) func() int { // ERROR "moved to heap: x"
|
|
return func() int { // ERROR "func literal escapes to heap"
|
|
return x // ERROR "&x escapes to heap"
|
|
}
|
|
}
|
|
|
|
func foo23a(x int) func() int { // ERROR "moved to heap: x"
|
|
f := func() int { // ERROR "func literal escapes to heap"
|
|
return x // ERROR "&x escapes to heap"
|
|
}
|
|
return f
|
|
}
|
|
|
|
func foo23b(x int) *(func() int) { // ERROR "moved to heap: x"
|
|
f := func() int { return x } // ERROR "moved to heap: f" "func literal escapes to heap" "&x escapes to heap"
|
|
return &f // ERROR "&f escapes to heap"
|
|
}
|
|
|
|
func foo24(x int) int {
|
|
return func() int { // ERROR "func literal does not escape"
|
|
return x
|
|
}()
|
|
}
|
|
|
|
var x *int
|
|
|
|
func fooleak(xx *int) int { // ERROR "leaking param: xx"
|
|
x = xx
|
|
return *x
|
|
}
|
|
|
|
func foonoleak(xx *int) int { // ERROR "xx does not escape"
|
|
return *x + *xx
|
|
}
|
|
|
|
func foo31(x int) int { // ERROR "moved to heap: x"
|
|
return fooleak(&x) // ERROR "&x escapes to heap"
|
|
}
|
|
|
|
func foo32(x int) int {
|
|
return foonoleak(&x) // ERROR "&x does not escape"
|
|
}
|
|
|
|
type Foo struct {
|
|
xx *int
|
|
x int
|
|
}
|
|
|
|
var F Foo
|
|
var pf *Foo
|
|
|
|
func (f *Foo) fooleak() { // ERROR "leaking param: f"
|
|
pf = f
|
|
}
|
|
|
|
func (f *Foo) foonoleak() { // ERROR "f does not escape"
|
|
F.x = f.x
|
|
}
|
|
|
|
func (f *Foo) Leak() { // ERROR "leaking param: f"
|
|
f.fooleak()
|
|
}
|
|
|
|
func (f *Foo) NoLeak() { // ERROR "f does not escape"
|
|
f.foonoleak()
|
|
}
|
|
|
|
func foo41(x int) { // ERROR "moved to heap: x"
|
|
F.xx = &x // ERROR "&x escapes to heap"
|
|
}
|
|
|
|
func (f *Foo) foo42(x int) { // ERROR "f does not escape" "moved to heap: x"
|
|
f.xx = &x // ERROR "&x escapes to heap"
|
|
}
|
|
|
|
func foo43(f *Foo, x int) { // ERROR "f does not escape" "moved to heap: x"
|
|
f.xx = &x // ERROR "&x escapes to heap"
|
|
}
|
|
|
|
func foo44(yy *int) { // ERROR "leaking param: yy"
|
|
F.xx = yy
|
|
}
|
|
|
|
func (f *Foo) foo45() { // ERROR "f does not escape"
|
|
F.x = f.x
|
|
}
|
|
|
|
// See foo13 above for explanation of why f leaks.
|
|
func (f *Foo) foo46() { // ERROR "leaking param: f"
|
|
F.xx = f.xx
|
|
}
|
|
|
|
func (f *Foo) foo47() { // ERROR "leaking param: f"
|
|
f.xx = &f.x // ERROR "&f.x escapes to heap"
|
|
}
|
|
|
|
var ptrSlice []*int
|
|
|
|
func foo50(i *int) { // ERROR "leaking param: i"
|
|
ptrSlice[0] = i
|
|
}
|
|
|
|
var ptrMap map[*int]*int
|
|
|
|
func foo51(i *int) { // ERROR "leaking param: i"
|
|
ptrMap[i] = i
|
|
}
|
|
|
|
func indaddr1(x int) *int { // ERROR "moved to heap: x"
|
|
return &x // ERROR "&x escapes to heap"
|
|
}
|
|
|
|
func indaddr2(x *int) *int { // ERROR "leaking param: x"
|
|
return *&x // ERROR "&x does not escape"
|
|
}
|
|
|
|
func indaddr3(x *int32) *int { // ERROR "leaking param: x"
|
|
return *(**int)(unsafe.Pointer(&x)) // ERROR "&x does not escape"
|
|
}
|
|
|
|
// From package math:
|
|
|
|
func Float32bits(f float32) uint32 {
|
|
return *(*uint32)(unsafe.Pointer(&f)) // ERROR "&f does not escape"
|
|
}
|
|
|
|
func Float32frombits(b uint32) float32 {
|
|
return *(*float32)(unsafe.Pointer(&b)) // ERROR "&b does not escape"
|
|
}
|
|
|
|
func Float64bits(f float64) uint64 {
|
|
return *(*uint64)(unsafe.Pointer(&f)) // ERROR "&f does not escape"
|
|
}
|
|
|
|
func Float64frombits(b uint64) float64 {
|
|
return *(*float64)(unsafe.Pointer(&b)) // ERROR "&b does not escape"
|
|
}
|
|
|
|
// contrast with
|
|
func float64bitsptr(f float64) *uint64 { // ERROR "moved to heap: f"
|
|
return (*uint64)(unsafe.Pointer(&f)) // ERROR "&f escapes to heap"
|
|
}
|
|
|
|
func float64ptrbitsptr(f *float64) *uint64 { // ERROR "leaking param: f"
|
|
return (*uint64)(unsafe.Pointer(f))
|
|
}
|
|
|
|
func typesw(i interface{}) *int { // ERROR "leaking param: i"
|
|
switch val := i.(type) {
|
|
case *int:
|
|
return val
|
|
case *int8:
|
|
v := int(*val) // ERROR "moved to heap: v"
|
|
return &v // ERROR "&v escapes to heap"
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func exprsw(i *int) *int { // ERROR "leaking param: i"
|
|
switch j := i; *j + 110 {
|
|
case 12:
|
|
return j
|
|
case 42:
|
|
return nil
|
|
}
|
|
return nil
|
|
|
|
}
|
|
|
|
// assigning to an array element is like assigning to the array
|
|
func foo60(i *int) *int { // ERROR "leaking param: i"
|
|
var a [12]*int
|
|
a[0] = i
|
|
return a[1]
|
|
}
|
|
|
|
func foo60a(i *int) *int { // ERROR "i does not escape"
|
|
var a [12]*int
|
|
a[0] = i
|
|
return nil
|
|
}
|
|
|
|
// assigning to a struct field is like assigning to the struct
|
|
func foo61(i *int) *int { // ERROR "leaking param: i"
|
|
type S struct {
|
|
a, b *int
|
|
}
|
|
var s S
|
|
s.a = i
|
|
return s.b
|
|
}
|
|
|
|
func foo61a(i *int) *int { // ERROR "i does not escape"
|
|
type S struct {
|
|
a, b *int
|
|
}
|
|
var s S
|
|
s.a = i
|
|
return nil
|
|
}
|
|
|
|
// assigning to a struct field is like assigning to the struct but
|
|
// here this subtlety is lost, since s.a counts as an assignment to a
|
|
// track-losing dereference.
|
|
func foo62(i *int) *int { // ERROR "leaking param: i"
|
|
type S struct {
|
|
a, b *int
|
|
}
|
|
s := new(S) // ERROR "new[(]S[)] does not escape"
|
|
s.a = i
|
|
return nil // s.b
|
|
}
|
|
|
|
type M interface {
|
|
M()
|
|
}
|
|
|
|
func foo63(m M) { // ERROR "m does not escape"
|
|
}
|
|
|
|
func foo64(m M) { // ERROR "leaking param: m"
|
|
m.M()
|
|
}
|
|
|
|
func foo64b(m M) { // ERROR "leaking param: m"
|
|
defer m.M()
|
|
}
|
|
|
|
type MV int
|
|
|
|
func (MV) M() {}
|
|
|
|
func foo65() {
|
|
var mv MV
|
|
foo63(&mv) // ERROR "&mv does not escape"
|
|
}
|
|
|
|
func foo66() {
|
|
var mv MV // ERROR "moved to heap: mv"
|
|
foo64(&mv) // ERROR "&mv escapes to heap"
|
|
}
|
|
|
|
func foo67() {
|
|
var mv MV
|
|
foo63(mv)
|
|
}
|
|
|
|
func foo68() {
|
|
var mv MV
|
|
foo64(mv) // escapes but it's an int so irrelevant
|
|
}
|
|
|
|
func foo69(m M) { // ERROR "leaking param: m"
|
|
foo64(m)
|
|
}
|
|
|
|
func foo70(mv1 *MV, m M) { // ERROR "leaking param: mv1" "leaking param: m"
|
|
m = mv1
|
|
foo64(m)
|
|
}
|
|
|
|
func foo71(x *int) []*int { // ERROR "leaking param: x"
|
|
var y []*int
|
|
y = append(y, x)
|
|
return y
|
|
}
|
|
|
|
func foo71a(x int) []*int { // ERROR "moved to heap: x"
|
|
var y []*int
|
|
y = append(y, &x) // ERROR "&x escapes to heap"
|
|
return y
|
|
}
|
|
|
|
func foo72() {
|
|
var x int
|
|
var y [1]*int
|
|
y[0] = &x // ERROR "&x does not escape"
|
|
}
|
|
|
|
func foo72aa() [10]*int {
|
|
var x int // ERROR "moved to heap: x"
|
|
var y [10]*int
|
|
y[0] = &x // ERROR "&x escapes to heap"
|
|
return y
|
|
}
|
|
|
|
func foo72a() {
|
|
var y [10]*int
|
|
for i := 0; i < 10; i++ {
|
|
// escapes its scope
|
|
x := i // ERROR "moved to heap: x"
|
|
y[i] = &x // ERROR "&x escapes to heap"
|
|
}
|
|
return
|
|
}
|
|
|
|
func foo72b() [10]*int {
|
|
var y [10]*int
|
|
for i := 0; i < 10; i++ {
|
|
x := i // ERROR "moved to heap: x"
|
|
y[i] = &x // ERROR "&x escapes to heap"
|
|
}
|
|
return y
|
|
}
|
|
|
|
// issue 2145
|
|
func foo73() {
|
|
s := []int{3, 2, 1} // ERROR "\[\]int literal does not escape"
|
|
for _, v := range s {
|
|
vv := v // ERROR "moved to heap: vv"
|
|
// actually just escapes its scope
|
|
defer func() { // ERROR "func literal escapes to heap"
|
|
println(vv) // ERROR "&vv escapes to heap"
|
|
}()
|
|
}
|
|
}
|
|
|
|
func foo74() {
|
|
s := []int{3, 2, 1} // ERROR "\[\]int literal does not escape"
|
|
for _, v := range s {
|
|
vv := v // ERROR "moved to heap: vv"
|
|
// actually just escapes its scope
|
|
fn := func() { // ERROR "func literal escapes to heap"
|
|
println(vv) // ERROR "&vv escapes to heap"
|
|
}
|
|
defer fn()
|
|
}
|
|
}
|
|
|
|
// issue 3975
|
|
func foo74b() {
|
|
var array [3]func()
|
|
s := []int{3, 2, 1} // ERROR "\[\]int literal does not escape"
|
|
for i, v := range s {
|
|
vv := v // ERROR "moved to heap: vv"
|
|
// actually just escapes its scope
|
|
array[i] = func() { // ERROR "func literal escapes to heap"
|
|
println(vv) // ERROR "&vv escapes to heap"
|
|
}
|
|
}
|
|
}
|
|
|
|
func myprint(y *int, x ...interface{}) *int { // ERROR "x does not escape" "leaking param: y"
|
|
return y
|
|
}
|
|
|
|
func myprint1(y *int, x ...interface{}) *interface{} { // ERROR "y does not escape" "leaking param: x"
|
|
return &x[0] // ERROR "&x.0. escapes to heap"
|
|
}
|
|
|
|
func foo75(z *int) { // ERROR "z does not escape"
|
|
myprint(z, 1, 2, 3) // ERROR "[.][.][.] argument does not escape"
|
|
}
|
|
|
|
func foo75a(z *int) { // ERROR "z does not escape"
|
|
myprint1(z, 1, 2, 3) // ERROR "[.][.][.] argument does not escape"
|
|
}
|
|
|
|
func foo75esc(z *int) { // ERROR "leaking param: z"
|
|
gxx = myprint(z, 1, 2, 3) // ERROR "[.][.][.] argument does not escape"
|
|
}
|
|
|
|
func foo75aesc(z *int) { // ERROR "z does not escape"
|
|
var ppi **interface{} // assignments to pointer dereferences lose track
|
|
*ppi = myprint1(z, 1, 2, 3) // ERROR "[.][.][.] argument escapes to heap"
|
|
}
|
|
|
|
func foo76(z *int) { // ERROR "leaking param: z"
|
|
myprint(nil, z) // ERROR "[.][.][.] argument does not escape"
|
|
}
|
|
|
|
func foo76a(z *int) { // ERROR "leaking param: z"
|
|
myprint1(nil, z) // ERROR "[.][.][.] argument does not escape"
|
|
}
|
|
|
|
func foo76b() {
|
|
myprint(nil, 1, 2, 3) // ERROR "[.][.][.] argument does not escape"
|
|
}
|
|
|
|
func foo76c() {
|
|
myprint1(nil, 1, 2, 3) // ERROR "[.][.][.] argument does not escape"
|
|
}
|
|
|
|
func foo76d() {
|
|
defer myprint(nil, 1, 2, 3) // ERROR "[.][.][.] argument does not escape"
|
|
}
|
|
|
|
func foo76e() {
|
|
defer myprint1(nil, 1, 2, 3) // ERROR "[.][.][.] argument does not escape"
|
|
}
|
|
|
|
func foo76f() {
|
|
for {
|
|
// TODO: This one really only escapes its scope, but we don't distinguish yet.
|
|
defer myprint(nil, 1, 2, 3) // ERROR "[.][.][.] argument escapes to heap"
|
|
}
|
|
}
|
|
|
|
func foo76g() {
|
|
for {
|
|
defer myprint1(nil, 1, 2, 3) // ERROR "[.][.][.] argument escapes to heap"
|
|
}
|
|
}
|
|
|
|
func foo77(z []interface{}) { // ERROR "z does not escape"
|
|
myprint(nil, z...) // z does not escape
|
|
}
|
|
|
|
func foo77a(z []interface{}) { // ERROR "z does not escape"
|
|
myprint1(nil, z...)
|
|
}
|
|
|
|
func foo77b(z []interface{}) { // ERROR "leaking param: z"
|
|
var ppi **interface{}
|
|
*ppi = myprint1(nil, z...)
|
|
}
|
|
|
|
func foo78(z int) *int { // ERROR "moved to heap: z"
|
|
return &z // ERROR "&z escapes to heap"
|
|
}
|
|
|
|
func foo78a(z int) *int { // ERROR "moved to heap: z"
|
|
y := &z // ERROR "&z escapes to heap"
|
|
x := &y // ERROR "&y does not escape"
|
|
return *x // really return y
|
|
}
|
|
|
|
func foo79() *int {
|
|
return new(int) // ERROR "new[(]int[)] escapes to heap"
|
|
}
|
|
|
|
func foo80() *int {
|
|
var z *int
|
|
for {
|
|
// Really just escapes its scope but we don't distinguish
|
|
z = new(int) // ERROR "new[(]int[)] escapes to heap"
|
|
}
|
|
_ = z
|
|
return nil
|
|
}
|
|
|
|
func foo81() *int {
|
|
for {
|
|
z := new(int) // ERROR "new[(]int[)] does not escape"
|
|
_ = z
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func tee(p *int) (x, y *int) { return p, p } // ERROR "leaking param"
|
|
|
|
func noop(x, y *int) {} // ERROR "does not escape"
|
|
|
|
func foo82() {
|
|
var x, y, z int // ERROR "moved to heap"
|
|
go noop(tee(&z)) // ERROR "&z escapes to heap"
|
|
go noop(&x, &y) // ERROR "escapes to heap"
|
|
for {
|
|
var u, v, w int // ERROR "moved to heap"
|
|
defer noop(tee(&u)) // ERROR "&u escapes to heap"
|
|
defer noop(&v, &w) // ERROR "escapes to heap"
|
|
}
|
|
}
|
|
|
|
type Fooer interface {
|
|
Foo()
|
|
}
|
|
|
|
type LimitedFooer struct {
|
|
Fooer
|
|
N int64
|
|
}
|
|
|
|
func LimitFooer(r Fooer, n int64) Fooer { // ERROR "leaking param: r"
|
|
return &LimitedFooer{r, n} // ERROR "&LimitedFooer literal escapes to heap"
|
|
}
|
|
|
|
func foo90(x *int) map[*int]*int { // ERROR "leaking param: x"
|
|
return map[*int]*int{nil: x} // ERROR "map\[\*int\]\*int literal escapes to heap"
|
|
}
|
|
|
|
func foo91(x *int) map[*int]*int { // ERROR "leaking param: x"
|
|
return map[*int]*int{x: nil} // ERROR "map\[\*int\]\*int literal escapes to heap"
|
|
}
|
|
|
|
func foo92(x *int) [2]*int { // ERROR "leaking param: x"
|
|
return [2]*int{x, nil}
|
|
}
|
|
|
|
// does not leak c
|
|
func foo93(c chan *int) *int { // ERROR "c does not escape"
|
|
for v := range c {
|
|
return v
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// does not leak m
|
|
func foo94(m map[*int]*int, b bool) *int { // ERROR "m does not escape"
|
|
for k, v := range m {
|
|
if b {
|
|
return k
|
|
}
|
|
return v
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// does leak x
|
|
func foo95(m map[*int]*int, x *int) { // ERROR "m does not escape" "leaking param: x"
|
|
m[x] = x
|
|
}
|
|
|
|
// does not leak m
|
|
func foo96(m []*int) *int { // ERROR "m does not escape"
|
|
return m[0]
|
|
}
|
|
|
|
// does leak m
|
|
func foo97(m [1]*int) *int { // ERROR "leaking param: m"
|
|
return m[0]
|
|
}
|
|
|
|
// does not leak m
|
|
func foo98(m map[int]*int) *int { // ERROR "m does not escape"
|
|
return m[0]
|
|
}
|
|
|
|
// does leak m
|
|
func foo99(m *[1]*int) []*int { // ERROR "leaking param: m"
|
|
return m[:]
|
|
}
|
|
|
|
// does not leak m
|
|
func foo100(m []*int) *int { // ERROR "m does not escape"
|
|
for _, v := range m {
|
|
return v
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// does leak m
|
|
func foo101(m [1]*int) *int { // ERROR "leaking param: m"
|
|
for _, v := range m {
|
|
return v
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// does not leak m
|
|
func foo101a(m [1]*int) *int { // ERROR "m does not escape"
|
|
for i := range m { // ERROR "moved to heap: i"
|
|
return &i // ERROR "&i escapes to heap"
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// does leak x
|
|
func foo102(m []*int, x *int) { // ERROR "m does not escape" "leaking param: x"
|
|
m[0] = x
|
|
}
|
|
|
|
// does not leak x
|
|
func foo103(m [1]*int, x *int) { // ERROR "m does not escape" "x does not escape"
|
|
m[0] = x
|
|
}
|
|
|
|
var y []*int
|
|
|
|
// does not leak x
|
|
func foo104(x []*int) { // ERROR "x does not escape"
|
|
copy(y, x)
|
|
}
|
|
|
|
// does not leak x
|
|
func foo105(x []*int) { // ERROR "x does not escape"
|
|
_ = append(y, x...)
|
|
}
|
|
|
|
// does leak x
|
|
func foo106(x *int) { // ERROR "leaking param: x"
|
|
_ = append(y, x)
|
|
}
|
|
|
|
func foo107(x *int) map[*int]*int { // ERROR "leaking param: x"
|
|
return map[*int]*int{x: nil} // ERROR "map.* literal escapes to heap"
|
|
}
|
|
|
|
func foo108(x *int) map[*int]*int { // ERROR "leaking param: x"
|
|
return map[*int]*int{nil: x} // ERROR "map.* literal escapes to heap"
|
|
}
|
|
|
|
func foo109(x *int) *int { // ERROR "leaking param: x"
|
|
m := map[*int]*int{x: nil} // ERROR "map.* literal does not escape"
|
|
for k, _ := range m {
|
|
return k
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func foo110(x *int) *int { // ERROR "leaking param: x"
|
|
m := map[*int]*int{nil: x} // ERROR "map.* literal does not escape"
|
|
return m[nil]
|
|
}
|
|
|
|
func foo111(x *int) *int { // ERROR "leaking param: x"
|
|
m := []*int{x} // ERROR "\[\]\*int literal does not escape"
|
|
return m[0]
|
|
}
|
|
|
|
func foo112(x *int) *int { // ERROR "leaking param: x"
|
|
m := [1]*int{x}
|
|
return m[0]
|
|
}
|
|
|
|
func foo113(x *int) *int { // ERROR "leaking param: x"
|
|
m := Bar{ii: x}
|
|
return m.ii
|
|
}
|
|
|
|
func foo114(x *int) *int { // ERROR "leaking param: x"
|
|
m := &Bar{ii: x} // ERROR "&Bar literal does not escape"
|
|
return m.ii
|
|
}
|
|
|
|
func foo115(x *int) *int { // ERROR "leaking param: x"
|
|
return (*int)(unsafe.Pointer(uintptr(unsafe.Pointer(x)) + 1))
|
|
}
|
|
|
|
func foo116(b bool) *int {
|
|
if b {
|
|
x := 1 // ERROR "moved to heap: x"
|
|
return &x // ERROR "&x escapes to heap"
|
|
} else {
|
|
y := 1 // ERROR "moved to heap: y"
|
|
return &y // ERROR "&y escapes to heap"
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func foo117(unknown func(interface{})) { // ERROR "unknown does not escape"
|
|
x := 1 // ERROR "moved to heap: x"
|
|
unknown(&x) // ERROR "&x escapes to heap"
|
|
}
|
|
|
|
func foo118(unknown func(*int)) { // ERROR "unknown does not escape"
|
|
x := 1 // ERROR "moved to heap: x"
|
|
unknown(&x) // ERROR "&x escapes to heap"
|
|
}
|
|
|
|
func external(*int)
|
|
|
|
func foo119(x *int) { // ERROR "leaking param: x"
|
|
external(x)
|
|
}
|
|
|
|
func foo120() {
|
|
// formerly exponential time analysis
|
|
L1:
|
|
L2:
|
|
L3:
|
|
L4:
|
|
L5:
|
|
L6:
|
|
L7:
|
|
L8:
|
|
L9:
|
|
L10:
|
|
L11:
|
|
L12:
|
|
L13:
|
|
L14:
|
|
L15:
|
|
L16:
|
|
L17:
|
|
L18:
|
|
L19:
|
|
L20:
|
|
L21:
|
|
L22:
|
|
L23:
|
|
L24:
|
|
L25:
|
|
L26:
|
|
L27:
|
|
L28:
|
|
L29:
|
|
L30:
|
|
L31:
|
|
L32:
|
|
L33:
|
|
L34:
|
|
L35:
|
|
L36:
|
|
L37:
|
|
L38:
|
|
L39:
|
|
L40:
|
|
L41:
|
|
L42:
|
|
L43:
|
|
L44:
|
|
L45:
|
|
L46:
|
|
L47:
|
|
L48:
|
|
L49:
|
|
L50:
|
|
L51:
|
|
L52:
|
|
L53:
|
|
L54:
|
|
L55:
|
|
L56:
|
|
L57:
|
|
L58:
|
|
L59:
|
|
L60:
|
|
L61:
|
|
L62:
|
|
L63:
|
|
L64:
|
|
L65:
|
|
L66:
|
|
L67:
|
|
L68:
|
|
L69:
|
|
L70:
|
|
L71:
|
|
L72:
|
|
L73:
|
|
L74:
|
|
L75:
|
|
L76:
|
|
L77:
|
|
L78:
|
|
L79:
|
|
L80:
|
|
L81:
|
|
L82:
|
|
L83:
|
|
L84:
|
|
L85:
|
|
L86:
|
|
L87:
|
|
L88:
|
|
L89:
|
|
L90:
|
|
L91:
|
|
L92:
|
|
L93:
|
|
L94:
|
|
L95:
|
|
L96:
|
|
L97:
|
|
L98:
|
|
L99:
|
|
L100:
|
|
// use the labels to silence compiler errors
|
|
goto L1
|
|
goto L2
|
|
goto L3
|
|
goto L4
|
|
goto L5
|
|
goto L6
|
|
goto L7
|
|
goto L8
|
|
goto L9
|
|
goto L10
|
|
goto L11
|
|
goto L12
|
|
goto L13
|
|
goto L14
|
|
goto L15
|
|
goto L16
|
|
goto L17
|
|
goto L18
|
|
goto L19
|
|
goto L20
|
|
goto L21
|
|
goto L22
|
|
goto L23
|
|
goto L24
|
|
goto L25
|
|
goto L26
|
|
goto L27
|
|
goto L28
|
|
goto L29
|
|
goto L30
|
|
goto L31
|
|
goto L32
|
|
goto L33
|
|
goto L34
|
|
goto L35
|
|
goto L36
|
|
goto L37
|
|
goto L38
|
|
goto L39
|
|
goto L40
|
|
goto L41
|
|
goto L42
|
|
goto L43
|
|
goto L44
|
|
goto L45
|
|
goto L46
|
|
goto L47
|
|
goto L48
|
|
goto L49
|
|
goto L50
|
|
goto L51
|
|
goto L52
|
|
goto L53
|
|
goto L54
|
|
goto L55
|
|
goto L56
|
|
goto L57
|
|
goto L58
|
|
goto L59
|
|
goto L60
|
|
goto L61
|
|
goto L62
|
|
goto L63
|
|
goto L64
|
|
goto L65
|
|
goto L66
|
|
goto L67
|
|
goto L68
|
|
goto L69
|
|
goto L70
|
|
goto L71
|
|
goto L72
|
|
goto L73
|
|
goto L74
|
|
goto L75
|
|
goto L76
|
|
goto L77
|
|
goto L78
|
|
goto L79
|
|
goto L80
|
|
goto L81
|
|
goto L82
|
|
goto L83
|
|
goto L84
|
|
goto L85
|
|
goto L86
|
|
goto L87
|
|
goto L88
|
|
goto L89
|
|
goto L90
|
|
goto L91
|
|
goto L92
|
|
goto L93
|
|
goto L94
|
|
goto L95
|
|
goto L96
|
|
goto L97
|
|
goto L98
|
|
goto L99
|
|
goto L100
|
|
}
|
|
|
|
func foo121() {
|
|
for i := 0; i < 10; i++ {
|
|
defer myprint(nil, i) // ERROR "[.][.][.] argument escapes to heap"
|
|
go myprint(nil, i) // ERROR "[.][.][.] argument escapes to heap"
|
|
}
|
|
}
|
|
|
|
// same as foo121 but check across import
|
|
func foo121b() {
|
|
for i := 0; i < 10; i++ {
|
|
defer fmt.Printf("%d", i) // ERROR "[.][.][.] argument escapes to heap"
|
|
go fmt.Printf("%d", i) // ERROR "[.][.][.] argument escapes to heap"
|
|
}
|
|
}
|
|
|
|
// a harmless forward jump
|
|
func foo122() {
|
|
var i *int
|
|
|
|
goto L1
|
|
L1:
|
|
i = new(int) // ERROR "new.int. does not escape"
|
|
_ = i
|
|
}
|
|
|
|
// a backward jump, increases loopdepth
|
|
func foo123() {
|
|
var i *int
|
|
|
|
L1:
|
|
i = new(int) // ERROR "new.int. escapes to heap"
|
|
|
|
goto L1
|
|
_ = i
|
|
}
|
|
|
|
func foo124(x **int) { // ERROR "x does not escape"
|
|
var i int // ERROR "moved to heap: i"
|
|
p := &i // ERROR "&i escapes"
|
|
func() { // ERROR "func literal does not escape"
|
|
*x = p // ERROR "leaking closure reference p"
|
|
}()
|
|
}
|
|
|
|
func foo125(ch chan *int) { // ERROR "does not escape"
|
|
var i int // ERROR "moved to heap"
|
|
p := &i // ERROR "&i escapes to heap"
|
|
func() { // ERROR "func literal does not escape"
|
|
ch <- p // ERROR "leaking closure reference p"
|
|
}()
|
|
}
|
|
|
|
func foo126() {
|
|
var px *int // loopdepth 0
|
|
for {
|
|
// loopdepth 1
|
|
var i int // ERROR "moved to heap"
|
|
func() { // ERROR "func literal does not escape"
|
|
px = &i // ERROR "&i escapes"
|
|
}()
|
|
}
|
|
_ = px
|
|
}
|
|
|
|
var px *int
|
|
|
|
func foo127() {
|
|
var i int // ERROR "moved to heap: i"
|
|
p := &i // ERROR "&i escapes to heap"
|
|
q := p
|
|
px = q
|
|
}
|
|
|
|
func foo128() {
|
|
var i int
|
|
p := &i // ERROR "&i does not escape"
|
|
q := p
|
|
_ = q
|
|
}
|
|
|
|
func foo129() {
|
|
var i int // ERROR "moved to heap: i"
|
|
p := &i // ERROR "&i escapes to heap"
|
|
func() { // ERROR "func literal does not escape"
|
|
q := p // ERROR "leaking closure reference p"
|
|
func() { // ERROR "func literal does not escape"
|
|
r := q // ERROR "leaking closure reference q"
|
|
px = r
|
|
}()
|
|
}()
|
|
}
|
|
|
|
func foo130() {
|
|
for {
|
|
var i int // ERROR "moved to heap"
|
|
func() { // ERROR "func literal does not escape"
|
|
px = &i // ERROR "&i escapes" "leaking closure reference i"
|
|
}()
|
|
}
|
|
}
|
|
|
|
func foo131() {
|
|
var i int // ERROR "moved to heap"
|
|
func() { // ERROR "func literal does not escape"
|
|
px = &i // ERROR "&i escapes" "leaking closure reference i"
|
|
}()
|
|
}
|
|
|
|
func foo132() {
|
|
var i int // ERROR "moved to heap"
|
|
go func() { // ERROR "func literal escapes to heap"
|
|
px = &i // ERROR "&i escapes" "leaking closure reference i"
|
|
}()
|
|
}
|
|
|
|
func foo133() {
|
|
var i int // ERROR "moved to heap"
|
|
defer func() { // ERROR "func literal does not escape"
|
|
px = &i // ERROR "&i escapes" "leaking closure reference i"
|
|
}()
|
|
}
|
|
|
|
func foo134() {
|
|
var i int
|
|
p := &i // ERROR "&i does not escape"
|
|
func() { // ERROR "func literal does not escape"
|
|
q := p
|
|
func() { // ERROR "func literal does not escape"
|
|
r := q
|
|
_ = r
|
|
}()
|
|
}()
|
|
}
|
|
|
|
func foo135() {
|
|
var i int // ERROR "moved to heap: i"
|
|
p := &i // ERROR "&i escapes to heap" "moved to heap: p"
|
|
go func() { // ERROR "func literal escapes to heap"
|
|
q := p // ERROR "&p escapes to heap"
|
|
func() { // ERROR "func literal does not escape"
|
|
r := q
|
|
_ = r
|
|
}()
|
|
}()
|
|
}
|
|
|
|
func foo136() {
|
|
var i int // ERROR "moved to heap: i"
|
|
p := &i // ERROR "&i escapes to heap" "moved to heap: p"
|
|
go func() { // ERROR "func literal escapes to heap"
|
|
q := p // ERROR "&p escapes to heap" "leaking closure reference p"
|
|
func() { // ERROR "func literal does not escape"
|
|
r := q // ERROR "leaking closure reference q"
|
|
px = r
|
|
}()
|
|
}()
|
|
}
|
|
|
|
func foo137() {
|
|
var i int // ERROR "moved to heap: i"
|
|
p := &i // ERROR "&i escapes to heap"
|
|
func() { // ERROR "func literal does not escape"
|
|
q := p // ERROR "leaking closure reference p" "moved to heap: q"
|
|
go func() { // ERROR "func literal escapes to heap"
|
|
r := q // ERROR "&q escapes to heap"
|
|
_ = r
|
|
}()
|
|
}()
|
|
}
|
|
|
|
func foo138() *byte {
|
|
type T struct {
|
|
x [1]byte
|
|
}
|
|
t := new(T) // ERROR "new.T. escapes to heap"
|
|
return &t.x[0] // ERROR "&t.x.0. escapes to heap"
|
|
}
|
|
|
|
func foo139() *byte {
|
|
type T struct {
|
|
x struct {
|
|
y byte
|
|
}
|
|
}
|
|
t := new(T) // ERROR "new.T. escapes to heap"
|
|
return &t.x.y // ERROR "&t.x.y escapes to heap"
|
|
}
|
|
|
|
// issue 4751
|
|
func foo140() interface{} {
|
|
type T struct {
|
|
X string
|
|
}
|
|
type U struct {
|
|
X string
|
|
T *T
|
|
}
|
|
t := &T{} // ERROR "&T literal escapes to heap"
|
|
return U{
|
|
X: t.X,
|
|
T: t,
|
|
}
|
|
}
|
|
|
|
//go:noescape
|
|
|
|
func F1([]byte)
|
|
|
|
func F2([]byte)
|
|
|
|
//go:noescape
|
|
|
|
func F3(x []byte) // ERROR "F3 x does not escape"
|
|
|
|
func F4(x []byte)
|
|
|
|
func G() {
|
|
var buf1 [10]byte
|
|
F1(buf1[:]) // ERROR "buf1 does not escape"
|
|
|
|
var buf2 [10]byte // ERROR "moved to heap: buf2"
|
|
F2(buf2[:]) // ERROR "buf2 escapes to heap"
|
|
|
|
var buf3 [10]byte
|
|
F3(buf3[:]) // ERROR "buf3 does not escape"
|
|
|
|
var buf4 [10]byte // ERROR "moved to heap: buf4"
|
|
F4(buf4[:]) // ERROR "buf4 escapes to heap"
|
|
}
|
|
|
|
type Tm struct {
|
|
x int
|
|
}
|
|
|
|
func (t *Tm) M() { // ERROR "t does not escape"
|
|
}
|
|
|
|
func foo141() {
|
|
var f func()
|
|
|
|
t := new(Tm) // ERROR "escapes to heap"
|
|
f = t.M // ERROR "t.M does not escape"
|
|
_ = f
|
|
}
|
|
|
|
var gf func()
|
|
|
|
func foo142() {
|
|
t := new(Tm) // ERROR "escapes to heap"
|
|
gf = t.M // ERROR "t.M escapes to heap"
|
|
}
|
|
|
|
// issue 3888.
|
|
func foo143() {
|
|
for i := 0; i < 1000; i++ {
|
|
func() { // ERROR "func literal does not escape"
|
|
for i := 0; i < 1; i++ {
|
|
var t Tm
|
|
t.M() // ERROR "t does not escape"
|
|
}
|
|
}()
|
|
}
|
|
}
|
|
|
|
// issue 5773
|
|
// Check that annotations take effect regardless of whether they
|
|
// are before or after the use in the source code.
|
|
|
|
//go:noescape
|
|
|
|
func foo144a(*int)
|
|
|
|
func foo144() {
|
|
var x int
|
|
foo144a(&x) // ERROR "&x does not escape"
|
|
var y int
|
|
foo144b(&y) // ERROR "&y does not escape"
|
|
}
|
|
|
|
//go:noescape
|
|
|
|
func foo144b(*int)
|
|
|
|
// issue 7313: for loop init should not be treated as "in loop"
|
|
|
|
type List struct {
|
|
Next *List
|
|
}
|
|
|
|
func foo145(l List) { // ERROR "l does not escape"
|
|
var p *List
|
|
for p = &l; p.Next != nil; p = p.Next { // ERROR "&l does not escape"
|
|
}
|
|
}
|
|
|
|
func foo146(l List) { // ERROR "l does not escape"
|
|
var p *List
|
|
p = &l // ERROR "&l does not escape"
|
|
for ; p.Next != nil; p = p.Next {
|
|
}
|
|
}
|
|
|
|
func foo147(l List) { // ERROR "l does not escape"
|
|
var p *List
|
|
p = &l // ERROR "&l does not escape"
|
|
for p.Next != nil {
|
|
p = p.Next
|
|
}
|
|
}
|
|
|
|
func foo148(l List) { // ERROR " l does not escape"
|
|
for p := &l; p.Next != nil; p = p.Next { // ERROR "&l does not escape"
|
|
}
|
|
}
|
|
|
|
// related: address of variable should have depth of variable, not of loop
|
|
|
|
func foo149(l List) { // ERROR " l does not escape"
|
|
var p *List
|
|
for {
|
|
for p = &l; p.Next != nil; p = p.Next { // ERROR "&l does not escape"
|
|
}
|
|
}
|
|
}
|
|
|
|
// issue 7934: missed ... if element type had no pointers
|
|
|
|
var save150 []byte
|
|
|
|
func foo150(x ...byte) { // ERROR "leaking param: x"
|
|
save150 = x
|
|
}
|
|
|
|
func bar150() {
|
|
foo150(1, 2, 3) // ERROR "[.][.][.] argument escapes to heap"
|
|
}
|
|
|
|
// issue 7931: bad handling of slice of array
|
|
|
|
var save151 *int
|
|
|
|
func foo151(x *int) { // ERROR "leaking param: x"
|
|
save151 = x
|
|
}
|
|
|
|
func bar151() {
|
|
var a [64]int // ERROR "moved to heap: a"
|
|
a[4] = 101
|
|
foo151(&(&a)[4:8][0]) // ERROR "&\(&a\)\[4:8\]\[0\] escapes to heap" "&a escapes to heap"
|
|
}
|
|
|
|
func bar151b() {
|
|
var a [10]int // ERROR "moved to heap: a"
|
|
b := a[:] // ERROR "a escapes to heap"
|
|
foo151(&b[4:8][0]) // ERROR "&b\[4:8\]\[0\] escapes to heap"
|
|
}
|
|
|
|
func bar151c() {
|
|
var a [64]int // ERROR "moved to heap: a"
|
|
a[4] = 101
|
|
foo151(&(&a)[4:8:8][0]) // ERROR "&\(&a\)\[4:8:8\]\[0\] escapes to heap" "&a escapes to heap"
|
|
}
|
|
|
|
func bar151d() {
|
|
var a [10]int // ERROR "moved to heap: a"
|
|
b := a[:] // ERROR "a escapes to heap"
|
|
foo151(&b[4:8:8][0]) // ERROR "&b\[4:8:8\]\[0\] escapes to heap"
|
|
}
|
|
|
|
// issue 8120
|
|
|
|
type U struct {
|
|
s *string
|
|
}
|
|
|
|
func (u *U) String() *string { // ERROR "leaking param u content to result ~r0"
|
|
return u.s
|
|
}
|
|
|
|
type V struct {
|
|
s *string
|
|
}
|
|
|
|
func NewV(u U) *V { // ERROR "leaking param: u"
|
|
return &V{u.String()} // ERROR "&V literal escapes to heap" "u does not escape"
|
|
}
|
|
|
|
func foo152() {
|
|
a := "a" // ERROR "moved to heap: a"
|
|
u := U{&a} // ERROR "&a escapes to heap"
|
|
v := NewV(u)
|
|
println(v)
|
|
}
|
|
|
|
// issue 8176 - &x in type switch body not marked as escaping
|
|
|
|
func foo153(v interface{}) *int { // ERROR "leaking param: v"
|
|
switch x := v.(type) {
|
|
case int: // ERROR "moved to heap: x"
|
|
return &x // ERROR "&x escapes to heap"
|
|
}
|
|
panic(0)
|
|
}
|
|
|
|
// issue 8185 - &result escaping into result
|
|
|
|
func f() (x int, y *int) { // ERROR "moved to heap: x"
|
|
y = &x // ERROR "&x escapes to heap"
|
|
return
|
|
}
|
|
|
|
func g() (x interface{}) { // ERROR "moved to heap: x"
|
|
x = &x // ERROR "&x escapes to heap"
|
|
return
|
|
}
|
|
|
|
var sink interface{}
|
|
|
|
type Lit struct {
|
|
p *int
|
|
}
|
|
|
|
func ptrlitNoescape() {
|
|
// Both literal and element do not escape.
|
|
i := 0
|
|
x := &Lit{&i} // ERROR "&Lit literal does not escape" "&i does not escape"
|
|
_ = x
|
|
}
|
|
|
|
func ptrlitNoEscape2() {
|
|
// Literal does not escape, but element does.
|
|
i := 0 // ERROR "moved to heap: i"
|
|
x := &Lit{&i} // ERROR "&Lit literal does not escape" "&i escapes to heap"
|
|
sink = *x
|
|
}
|
|
|
|
func ptrlitEscape() {
|
|
// Both literal and element escape.
|
|
i := 0 // ERROR "moved to heap: i"
|
|
x := &Lit{&i} // ERROR "&Lit literal escapes to heap" "&i escapes to heap"
|
|
sink = x
|
|
}
|