diff --git a/test/escape_closure.go b/test/escape_closure.go new file mode 100644 index 0000000000..73578e460f --- /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" +}