/
githubmirror
/
go
Обзор
Документация
Войти
/
githubmirror
/
go
Код
Запросы
0
Пакеты
0
Релизы
0
Аналитика
Безопасность
master
test/fixedbugs/issue67255.go
33 строки
922 B
Keith Randall
cmd/compile: avoid past-the-end pointer when zeroing
08 май 2024, 20:09
08 май 2024, 20:09
93e3696
Код
Авторство
О чём код?
// run // Copyright 2024 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. package main var zero int var sink any func main() { var objs [][]*byte for i := 10; i < 200; i++ { // The objects we're allocating here are pointer-ful. Some will // max out their size class, which are the ones we want. // We also allocate from small to large, so that the object which // maxes out its size class is the last one allocated in that class. // This allocation pattern leaves the next object in the class // unallocated, which we need to reproduce the bug. objs = append(objs, make([]*byte, i)) } sink = objs // force heap allocation // Bug will happen as soon as the write barrier turns on. for range 10000 { sink = make([]*byte, 1024) for _, s := range objs { s = append(s, make([]*byte, zero)...) } } }