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master
test/fixedbugs/issue59680.go
100 строк
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Than McIntosh
cmd/compile: un-hide closure func if parent expr moved to staticinit
06 май 2023, 00:04
06 май 2023, 00:04
89138ce
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// run // Copyright 2023 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 import ( "sync" "time" ) type B struct { pid int f func() (uint64, error) wg sync.WaitGroup v uint64 } func newB(pid int) *B { return &B{ pid: pid, } } //go:noinline func Sq(i int) uint64 { S++ return uint64(i * i) } type RO func(*B) var ROSL = []RO{ Bad(), } func Bad() RO { return func(b *B) { b.f = func() (uint64, error) { return Sq(b.pid), nil } } } func (b *B) startit() chan<- struct{} { stop := make(chan struct{}) b.wg.Add(1) go func() { defer b.wg.Done() var v uint64 for { select { case <-stop: b.v = v return case <-time.After(1 * time.Millisecond): r, err := b.f() if err != nil { panic("bad") } v = r } } }() return stop } var S, G int //go:noinline func rec(x int) int { if x == 0 { return 9 } return rec(x-1) + 1 } //go:noinline func recur(x int) { for i := 0; i < x; i++ { G = rec(i) } } func main() { b := newB(17) for _, opt := range ROSL { opt(b) } stop := b.startit() // see if we can get some stack growth/moving recur(10101) if stop != nil { stop <- struct{}{} } }