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-rw-r--r--test/escape_closure.go179
1 files changed, 179 insertions, 0 deletions
diff --git a/test/escape_closure.go b/test/escape_closure.go
new file mode 100644
index 0000000..bd6c025
--- /dev/null
+++ b/test/escape_closure.go
@@ -0,0 +1,179 @@
+// 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
+ func(p *int) { // ERROR "p does not escape" "func literal does not escape"
+ *p = 1
+ }(&x)
+}
+
+func ClosureCallArgs1() {
+ x := 0
+ for {
+ func(p *int) { // ERROR "p does not escape" "func literal does not escape"
+ *p = 1
+ }(&x)
+ }
+}
+
+func ClosureCallArgs2() {
+ for {
+ x := 0
+ func(p *int) { // ERROR "p does not escape" "func literal does not escape"
+ *p = 1
+ }(&x)
+ }
+}
+
+func ClosureCallArgs3() {
+ x := 0 // ERROR "moved to heap: x"
+ func(p *int) { // ERROR "leaking param: p" "func literal does not escape"
+ sink = p
+ }(&x)
+}
+
+func ClosureCallArgs4() {
+ x := 0
+ _ = func(p *int) *int { // ERROR "leaking param: p to result ~r0" "func literal does not escape"
+ return p
+ }(&x)
+}
+
+func ClosureCallArgs5() {
+ x := 0 // ERROR "moved to heap: x"
+ // TODO(mdempsky): We get "leaking param: p" here because the new escape analysis pass
+ // can tell that p flows directly to sink, but it's a little weird. Re-evaluate.
+ sink = func(p *int) *int { // ERROR "leaking param: p" "func literal does not escape"
+ return p
+ }(&x)
+}
+
+func ClosureCallArgs6() {
+ x := 0 // ERROR "moved to heap: x"
+ func(p *int) { // ERROR "moved to heap: p" "func literal does not escape"
+ sink = &p
+ }(&x)
+}
+
+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)
+ }
+ _ = pp
+}
+
+func ClosureCallArgs8() {
+ x := 0
+ defer func(p *int) { // ERROR "p does not escape" "func literal does not escape"
+ *p = 1
+ }(&x)
+}
+
+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)
+ }
+}
+
+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)
+ }
+}
+
+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)
+}
+
+func ClosureCallArgs12() {
+ x := 0
+ defer func(p *int) *int { // ERROR "leaking param: p to result ~r0" "func literal does not escape"
+ return p
+ }(&x)
+}
+
+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
+ }(&x)
+}
+
+func ClosureCallArgs14() {
+ x := 0
+ p := &x
+ _ = func(p **int) *int { // ERROR "leaking param: p to result ~r0 level=1" "func literal does not escape"
+ return *p
+ }(&p)
+}
+
+func ClosureCallArgs15() {
+ x := 0 // ERROR "moved to heap: x"
+ p := &x
+ sink = func(p **int) *int { // ERROR "leaking param content: p" "func literal does not escape"
+ return *p
+ }(&p)
+}
+
+func ClosureLeak1(s string) string { // ERROR "s does not escape"
+ t := s + "YYYY" // ERROR "escapes to heap"
+ return ClosureLeak1a(t) // ERROR "... argument does not escape"
+}
+
+// See #14409 -- returning part of captured var leaks it.
+func ClosureLeak1a(a ...string) string { // ERROR "leaking param: a to result ~r0 level=1$"
+ return func() string { // ERROR "func literal does not escape"
+ return a[0]
+ }()
+}
+
+func ClosureLeak2(s string) string { // ERROR "s does not escape"
+ t := s + "YYYY" // ERROR "escapes to heap"
+ c := ClosureLeak2a(t) // ERROR "... argument does not escape"
+ return c
+}
+func ClosureLeak2a(a ...string) string { // ERROR "leaking param content: a"
+ return ClosureLeak2b(func() string { // ERROR "func literal does not escape"
+ return a[0]
+ })
+}
+func ClosureLeak2b(f func() string) string { // ERROR "f does not escape"
+ return f()
+}
+
+func ClosureIndirect() {
+ f := func(p *int) {} // ERROR "p does not escape" "func literal does not escape"
+ f(new(int)) // ERROR "new\(int\) does not escape"
+
+ g := f
+ g(new(int)) // ERROR "new\(int\) does not escape"
+
+ h := nopFunc
+ h(new(int)) // ERROR "new\(int\) does not escape"
+}
+
+func nopFunc(p *int) {} // ERROR "p does not escape"