| // run |
| |
| // Copyright 2016 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 to make sure we don't think values are dead |
| // when they are assigned to a PPARAMOUT slot before |
| // the last GC safepoint. |
| |
| package main |
| |
| import ( |
| "fmt" |
| "runtime" |
| ) |
| |
| // When a T is deallocated, T[1] is certain to |
| // get clobbered (the runtime writes 0xdeaddeaddeaddead there). |
| type T [4]int |
| |
| func f() (r, s *T) { |
| r = &T{0x30, 0x31, 0x32, 0x33} |
| runtime.GC() |
| s = &T{0x40, 0x41, 0x42, 0x43} |
| runtime.GC() |
| return |
| } |
| |
| func main() { |
| r, s := f() |
| if r[1] != 0x31 { |
| fmt.Printf("bad r[1], want 0x31 got %x\n", r[1]) |
| } |
| if s[1] != 0x41 { |
| fmt.Printf("bad s[1], want 0x41 got %x\n", s[1]) |
| } |
| } |
