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>
diff --git a/test/escape_closure.go b/test/escape_closure.go
new file mode 100644
index 0000000..73578e4
--- /dev/null
+++ b/test/escape_closure.go
@@ -0,0 +1,147 @@
+// 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 for closure arguments.
+
+package escape
+
+var sink interface{}
+
+func ClosureCallArgs0() {
+ x := 0 // ERROR "moved to heap: x"
+ func(p *int) { // ERROR "p does not escape" "func literal does not escape"
+ *p = 1
+ // BAD: x should not escape to heap here
+ }(&x) // ERROR "&x escapes to heap"
+}
+
+func ClosureCallArgs1() {
+ x := 0 // ERROR "moved to heap: x"
+ for {
+ func(p *int) { // ERROR "p does not escape" "func literal does not escape"
+ *p = 1
+ // BAD: x should not escape to heap here
+ }(&x) // ERROR "&x escapes to heap"
+ }
+}
+
+func ClosureCallArgs2() {
+ for {
+ // BAD: x should not escape here
+ x := 0 // ERROR "moved to heap: x"
+ func(p *int) { // ERROR "p does not escape" "func literal does not escape"
+ *p = 1
+ }(&x) // ERROR "&x escapes to heap"
+ }
+}
+
+func ClosureCallArgs3() {
+ x := 0 // ERROR "moved to heap: x"
+ func(p *int) { // ERROR "leaking param: p" "func literal does not escape"
+ sink = p
+ }(&x) // ERROR "&x escapes to heap"
+}
+
+func ClosureCallArgs4() {
+ // BAD: x should not leak here
+ x := 0 // ERROR "moved to heap: x"
+ _ = func(p *int) *int { // ERROR "leaking param: p to result ~r1" "func literal does not escape"
+ return p
+ }(&x) // ERROR "&x escapes to heap"
+}
+
+func ClosureCallArgs5() {
+ x := 0 // ERROR "moved to heap: x"
+ sink = func(p *int) *int { // ERROR "leaking param: p to result ~r1" "func literal does not escape"
+ return p
+ }(&x) // ERROR "&x escapes to heap"
+}
+
+func ClosureCallArgs6() {
+ x := 0 // ERROR "moved to heap: x"
+ func(p *int) { // ERROR "moved to heap: p" "func literal does not escape"
+ sink = &p // ERROR "&p escapes to heap"
+ }(&x) // ERROR "&x escapes to heap"
+}
+
+func ClosureCallArgs7() {
+ var pp *int
+ for {
+ x := 0 // ERROR "moved to heap: x"
+ func(p *int) { // ERROR "leaking param: p" "func literal does not escape"
+ pp = p
+ }(&x) // ERROR "&x escapes to heap"
+ }
+ _ = pp
+}
+
+func ClosureCallArgs8() {
+ x := 0 // ERROR "moved to heap: x"
+ defer func(p *int) { // ERROR "p does not escape" "func literal does not escape"
+ *p = 1
+ // BAD: x should not escape to heap here
+ }(&x) // ERROR "&x escapes to heap"
+}
+
+func ClosureCallArgs9() {
+ // BAD: x should not leak
+ x := 0 // ERROR "moved to heap: x"
+ for {
+ defer func(p *int) { // ERROR "func literal escapes to heap" "p does not escape"
+ *p = 1
+ }(&x) // ERROR "&x escapes to heap"
+ }
+}
+
+func ClosureCallArgs10() {
+ for {
+ x := 0 // ERROR "moved to heap: x"
+ defer func(p *int) { // ERROR "func literal escapes to heap" "p does not escape"
+ *p = 1
+ }(&x) // ERROR "&x escapes to heap"
+ }
+}
+
+func ClosureCallArgs11() {
+ x := 0 // ERROR "moved to heap: x"
+ defer func(p *int) { // ERROR "leaking param: p" "func literal does not escape"
+ sink = p
+ }(&x) // ERROR "&x escapes to heap"
+}
+
+func ClosureCallArgs12() {
+ // BAD: x should not leak
+ x := 0 // ERROR "moved to heap: x"
+ defer func(p *int) *int { // ERROR "leaking param: p to result ~r1" "func literal does not escape"
+ return p
+ }(&x) // ERROR "&x escapes to heap"
+}
+
+func ClosureCallArgs13() {
+ x := 0 // ERROR "moved to heap: x"
+ defer func(p *int) { // ERROR "moved to heap: p" "func literal does not escape"
+ sink = &p // ERROR "&p escapes to heap"
+ }(&x) // ERROR "&x escapes to heap"
+}
+
+func ClosureCallArgs14() {
+ x := 0 // ERROR "moved to heap: x"
+ // BAD: &x should not escape here
+ p := &x // ERROR "moved to heap: p" "&x escapes to heap"
+ _ = func(p **int) *int { // ERROR "leaking param p content to result ~r1" "func literal does not escape"
+ return *p
+ // BAD: p should not escape here
+ }(&p) // ERROR "&p escapes to heap"
+}
+
+func ClosureCallArgs15() {
+ x := 0 // ERROR "moved to heap: x"
+ p := &x // ERROR "moved to heap: p" "&x escapes to heap"
+ sink = func(p **int) *int { // ERROR "leaking param p content to result ~r1" "func literal does not escape"
+ return *p
+ // BAD: p should not escape here
+ }(&p) // ERROR "&p escapes to heap"
+}
