1 // run 2 3 // Copyright 2015 The Go Authors. All rights reserved. 4 // Use of this source code is governed by a BSD-style 5 // license that can be found in the LICENSE file. 6 7 package main 8 9 type T struct { 10 a, b, c int 11 } 12 13 func usestack() { 14 usestack1(32) 15 } 16 func usestack1(d int) byte { 17 if d == 0 { 18 return 0 19 } 20 var b [1024]byte 21 usestack1(d - 1) 22 return b[3] 23 } 24 25 const n = 100000 26 27 func main() { 28 c := make(chan interface{}) 29 done := make(chan bool) 30 31 for i := 0; i < 10; i++ { 32 go func() { 33 for j := 0; j < n; j++ { 34 c <- new(T) 35 } 36 done <- true 37 }() 38 go func() { 39 for j := 0; j < n; j++ { 40 _ = (<-c).(*T) 41 usestack() 42 } 43 done <- true 44 }() 45 } 46 for i := 0; i < 20; i++ { 47 <-done 48 } 49 } 50
