mirror of
https://github.com/golang/go
synced 2024-11-18 10:44:45 -07:00
49 lines
823 B
Go
49 lines
823 B
Go
|
// run
|
||
|
|
|
||
|
|
// Copyright 2021 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.
|
||
|
|
|
||
|
|
// A test for partial liveness / partial spilling / compiler-induced GC failure
|
||
|
|
|
||
|
|
package main
|
||
|
|
|
||
|
|
import "runtime"
|
||
|
|
import "unsafe"
|
||
|
|
|
||
|
|
//go:registerparams
|
||
|
|
func F(s []int) {
|
||
|
|
for i, x := range s {
|
||
|
|
G(i, x)
|
||
|
|
}
|
||
|
|
GC()
|
||
|
|
G(len(s), cap(s))
|
||
|
|
GC()
|
||
|
|
}
|
||
|
|
|
||
|
|
//go:noinline
|
||
|
|
//go:registerparams
|
||
|
|
func G(int, int) {}
|
||
|
|
|
||
|
|
//go:registerparams
|
||
|
|
func GC() { runtime.GC(); runtime.GC() }
|
||
|
|
|
||
|
|
func main() {
|
||
|
|
s := make([]int, 3)
|
||
|
|
escape(s)
|
||
|
|
p := int(uintptr(unsafe.Pointer(&s[2])) + 42) // likely point to unallocated memory
|
||
|
|
poison([3]int{p, p, p})
|
||
|
|
F(s)
|
||
|
|
}
|
||
|
|
|
||
|
|
//go:noinline
|
||
|
|
//go:registerparams
|
||
|
|
func poison([3]int) {}
|
||
|
|
|
||
|
|
//go:noinline
|
||
|
|
//go:registerparams
|
||
|
|
func escape(s []int) {
|
||
|
|
g = s
|
||
|
|
}
|
||
|
|
var g []int
|