mirror of
https://github.com/golang/go
synced 2024-11-22 15:24:42 -07:00
test: add regress test for #27557
This commit just adds a regress test for a few of the important corner cases that I identified in #27557, which turn out to not be tested anywhere. While here, annotate a few of the existing test cases where we could improve escape analysis. Updates #27557. Change-Id: Ie57792a538f7899bb17915485fabc86100f469a3 Reviewed-on: https://go-review.googlesource.com/c/go/+/197137 Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>
This commit is contained in:
parent
8189a06190
commit
f346a4c44c
@ -505,10 +505,7 @@ func (e *Escape) exprSkipInit(k EscHole, n *Node) {
|
||||
case OCALLPART:
|
||||
e.spill(k, n)
|
||||
|
||||
// esc.go says "Contents make it to memory, lose
|
||||
// track." I think we can just flow n.Left to our
|
||||
// spilled location though.
|
||||
// TODO(mdempsky): Try that.
|
||||
// TODO(mdempsky): We can do better here. See #27557.
|
||||
e.assignHeap(n.Left, "call part", n)
|
||||
|
||||
case OPTRLIT:
|
||||
|
@ -1386,6 +1386,7 @@ func (t *Tm) M() { // ERROR "t does not escape$"
|
||||
func foo141() {
|
||||
var f func()
|
||||
|
||||
// BAD: new(Tm) should not escape
|
||||
t := new(Tm) // ERROR "new\(Tm\) escapes to heap$"
|
||||
f = t.M // ERROR "t.M does not escape$"
|
||||
_ = f
|
||||
|
@ -1386,6 +1386,7 @@ func (t *Tm) M() { // ERROR "t does not escape$"
|
||||
func foo141() {
|
||||
var f func()
|
||||
|
||||
// BAD: new(Tm) should not escape
|
||||
t := new(Tm) // ERROR "new\(Tm\) escapes to heap$"
|
||||
f = t.M // ERROR "t.M does not escape$"
|
||||
_ = f
|
||||
|
@ -14,6 +14,7 @@ func (s *S) Inc() {} // ERROR "s does not escape"
|
||||
var N int
|
||||
|
||||
func F1() {
|
||||
// BAD: s should not escape
|
||||
var s S // ERROR "moved to heap: s"
|
||||
for i := 0; i < N; i++ {
|
||||
fs := []func(){ // ERROR "\[\]func\(\) literal does not escape"
|
||||
@ -26,6 +27,7 @@ func F1() {
|
||||
}
|
||||
|
||||
func F2() {
|
||||
// BAD: s should not escape
|
||||
var s S // ERROR "moved to heap: s"
|
||||
for i := 0; i < N; i++ {
|
||||
for _, f := range []func(){ // ERROR "\[\]func\(\) literal does not escape"
|
||||
|
42
test/fixedbugs/issue27557.go
Normal file
42
test/fixedbugs/issue27557.go
Normal file
@ -0,0 +1,42 @@
|
||||
// errorcheck -0 -l -m
|
||||
|
||||
// Copyright 2019 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.
|
||||
|
||||
package p
|
||||
|
||||
var sink interface{}
|
||||
|
||||
func _() {
|
||||
// BAD: t should not escape
|
||||
var t T // ERROR "moved to heap"
|
||||
f := t.noescape // ERROR "t.noescape does not escape"
|
||||
f()
|
||||
}
|
||||
|
||||
func _() {
|
||||
var t T // ERROR "moved to heap"
|
||||
f := t.escape // ERROR "t.escape does not escape"
|
||||
f()
|
||||
}
|
||||
|
||||
func _() {
|
||||
var t T // ERROR "moved to heap"
|
||||
f := t.returns // ERROR "t.returns does not escape"
|
||||
sink = f()
|
||||
}
|
||||
|
||||
type T struct{}
|
||||
|
||||
func (t *T) noescape() {} // ERROR "t does not escape"
|
||||
func (t *T) escape() { sink = t } // ERROR "leaking param: t$"
|
||||
func (t *T) returns() *T { return t } // ERROR "leaking param: t to result ~r0 level=0"
|
||||
|
||||
func (t *T) recursive() { // ERROR "leaking param: t$"
|
||||
sink = t
|
||||
|
||||
var t2 T // ERROR "moved to heap"
|
||||
f := t2.recursive // ERROR "t2.recursive does not escape"
|
||||
f()
|
||||
}
|
Loading…
Reference in New Issue
Block a user