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test: add tests for escape analysis of closure arguments
10 false positives (var incorrectly escapes to heap) are marked with BAD. Change-Id: I773b13a18ff55aaa499a2a28a979118422cc5322 Reviewed-on: https://go-review.googlesource.com/5293 Reviewed-by: Keith Randall <khr@golang.org>
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147
test/escape_closure.go
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147
test/escape_closure.go
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// errorcheck -0 -m -l
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// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Test escape analysis for closure arguments.
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package escape
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var sink interface{}
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func ClosureCallArgs0() {
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x := 0 // ERROR "moved to heap: x"
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func(p *int) { // ERROR "p does not escape" "func literal does not escape"
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*p = 1
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// BAD: x should not escape to heap here
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}(&x) // ERROR "&x escapes to heap"
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}
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func ClosureCallArgs1() {
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x := 0 // ERROR "moved to heap: x"
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for {
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func(p *int) { // ERROR "p does not escape" "func literal does not escape"
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*p = 1
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// BAD: x should not escape to heap here
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}(&x) // ERROR "&x escapes to heap"
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}
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}
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func ClosureCallArgs2() {
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for {
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// BAD: x should not escape here
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x := 0 // ERROR "moved to heap: x"
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func(p *int) { // ERROR "p does not escape" "func literal does not escape"
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*p = 1
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}(&x) // ERROR "&x escapes to heap"
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}
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}
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func ClosureCallArgs3() {
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x := 0 // ERROR "moved to heap: x"
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func(p *int) { // ERROR "leaking param: p" "func literal does not escape"
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sink = p
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}(&x) // ERROR "&x escapes to heap"
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}
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func ClosureCallArgs4() {
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// BAD: x should not leak here
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x := 0 // ERROR "moved to heap: x"
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_ = func(p *int) *int { // ERROR "leaking param: p to result ~r1" "func literal does not escape"
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return p
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}(&x) // ERROR "&x escapes to heap"
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}
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func ClosureCallArgs5() {
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x := 0 // ERROR "moved to heap: x"
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sink = func(p *int) *int { // ERROR "leaking param: p to result ~r1" "func literal does not escape"
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return p
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}(&x) // ERROR "&x escapes to heap"
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}
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func ClosureCallArgs6() {
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x := 0 // ERROR "moved to heap: x"
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func(p *int) { // ERROR "moved to heap: p" "func literal does not escape"
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sink = &p // ERROR "&p escapes to heap"
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}(&x) // ERROR "&x escapes to heap"
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}
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func ClosureCallArgs7() {
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var pp *int
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for {
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x := 0 // ERROR "moved to heap: x"
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func(p *int) { // ERROR "leaking param: p" "func literal does not escape"
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pp = p
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}(&x) // ERROR "&x escapes to heap"
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}
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_ = pp
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}
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func ClosureCallArgs8() {
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x := 0 // ERROR "moved to heap: x"
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defer func(p *int) { // ERROR "p does not escape" "func literal does not escape"
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*p = 1
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// BAD: x should not escape to heap here
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}(&x) // ERROR "&x escapes to heap"
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}
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func ClosureCallArgs9() {
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// BAD: x should not leak
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x := 0 // ERROR "moved to heap: x"
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for {
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defer func(p *int) { // ERROR "func literal escapes to heap" "p does not escape"
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*p = 1
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}(&x) // ERROR "&x escapes to heap"
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}
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}
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func ClosureCallArgs10() {
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for {
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x := 0 // ERROR "moved to heap: x"
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defer func(p *int) { // ERROR "func literal escapes to heap" "p does not escape"
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*p = 1
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}(&x) // ERROR "&x escapes to heap"
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}
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}
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func ClosureCallArgs11() {
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x := 0 // ERROR "moved to heap: x"
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defer func(p *int) { // ERROR "leaking param: p" "func literal does not escape"
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sink = p
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}(&x) // ERROR "&x escapes to heap"
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}
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func ClosureCallArgs12() {
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// BAD: x should not leak
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x := 0 // ERROR "moved to heap: x"
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defer func(p *int) *int { // ERROR "leaking param: p to result ~r1" "func literal does not escape"
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return p
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}(&x) // ERROR "&x escapes to heap"
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}
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func ClosureCallArgs13() {
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x := 0 // ERROR "moved to heap: x"
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defer func(p *int) { // ERROR "moved to heap: p" "func literal does not escape"
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sink = &p // ERROR "&p escapes to heap"
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}(&x) // ERROR "&x escapes to heap"
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}
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func ClosureCallArgs14() {
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x := 0 // ERROR "moved to heap: x"
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// BAD: &x should not escape here
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p := &x // ERROR "moved to heap: p" "&x escapes to heap"
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_ = func(p **int) *int { // ERROR "leaking param p content to result ~r1" "func literal does not escape"
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return *p
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// BAD: p should not escape here
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}(&p) // ERROR "&p escapes to heap"
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}
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func ClosureCallArgs15() {
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x := 0 // ERROR "moved to heap: x"
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p := &x // ERROR "moved to heap: p" "&x escapes to heap"
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sink = func(p **int) *int { // ERROR "leaking param p content to result ~r1" "func literal does not escape"
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return *p
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// BAD: p should not escape here
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}(&p) // ERROR "&p escapes to heap"
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}
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