Patrice Arruda | 748609c | 2020-06-25 12:12:21 -0700 | [diff] [blame] | 1 | // errorcheck -0 -m -l |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 2 | |
Dan Willemsen | 38f2dba | 2016-07-08 14:54:35 -0700 | [diff] [blame] | 3 | // Copyright 2015 The Go Authors. All rights reserved. |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 4 | // Use of this source code is governed by a BSD-style |
| 5 | // license that can be found in the LICENSE file. |
| 6 | |
| 7 | // Test escape analysis for function parameters. |
| 8 | |
| 9 | package foo |
| 10 | |
| 11 | var Ssink *string |
| 12 | |
| 13 | type U struct { |
| 14 | _sp *string |
| 15 | _spp **string |
| 16 | } |
| 17 | |
| 18 | func A(sp *string, spp **string) U { // ERROR "leaking param: sp to result ~r2 level=0$" "leaking param: spp to result ~r2 level=0$" |
| 19 | return U{sp, spp} |
| 20 | } |
| 21 | |
Colin Cross | 430342c | 2019-09-07 08:36:04 -0700 | [diff] [blame] | 22 | func B(spp **string) U { // ERROR "leaking param: spp to result ~r1 level=0$" |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 23 | return U{*spp, spp} |
| 24 | } |
| 25 | |
| 26 | func tA1() { |
| 27 | s := "cat" |
Colin Cross | 430342c | 2019-09-07 08:36:04 -0700 | [diff] [blame] | 28 | sp := &s |
| 29 | spp := &sp |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 30 | u := A(sp, spp) |
| 31 | _ = u |
| 32 | println(s) |
| 33 | } |
| 34 | |
| 35 | func tA2() { |
| 36 | s := "cat" |
Colin Cross | 430342c | 2019-09-07 08:36:04 -0700 | [diff] [blame] | 37 | sp := &s |
| 38 | spp := &sp |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 39 | u := A(sp, spp) |
| 40 | println(*u._sp) |
| 41 | } |
| 42 | |
| 43 | func tA3() { |
| 44 | s := "cat" |
Colin Cross | 430342c | 2019-09-07 08:36:04 -0700 | [diff] [blame] | 45 | sp := &s |
| 46 | spp := &sp |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 47 | u := A(sp, spp) |
| 48 | println(**u._spp) |
| 49 | } |
| 50 | |
| 51 | func tB1() { |
| 52 | s := "cat" |
Colin Cross | 430342c | 2019-09-07 08:36:04 -0700 | [diff] [blame] | 53 | sp := &s |
| 54 | spp := &sp |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 55 | u := B(spp) |
| 56 | _ = u |
| 57 | println(s) |
| 58 | } |
| 59 | |
| 60 | func tB2() { |
| 61 | s := "cat" |
Colin Cross | 430342c | 2019-09-07 08:36:04 -0700 | [diff] [blame] | 62 | sp := &s |
| 63 | spp := &sp |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 64 | u := B(spp) |
| 65 | println(*u._sp) |
| 66 | } |
| 67 | |
| 68 | func tB3() { |
| 69 | s := "cat" |
Colin Cross | 430342c | 2019-09-07 08:36:04 -0700 | [diff] [blame] | 70 | sp := &s |
| 71 | spp := &sp |
Dan Willemsen | 09eb3b1 | 2015-09-16 14:34:17 -0700 | [diff] [blame] | 72 | u := B(spp) |
| 73 | println(**u._spp) |
| 74 | } |