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https://github.com/golang/go
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afb5fca25a
runtime.GC() doesn't guarantee the finalizer has run, so use a channel instead to make sure finalizer was run in call to "after()". Fixes #41361 Change-Id: I69c801e29aea49757ea72c52e8db13239de19ddc Reviewed-on: https://go-review.googlesource.com/c/go/+/254401 Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com> Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
47 lines
738 B
Go
47 lines
738 B
Go
// run
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// Copyright 2020 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// This test makes sure unsafe-uintptr arguments are not
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// kept alive longer than expected.
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package main
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import (
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"runtime"
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"unsafe"
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)
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var done = make(chan bool)
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func setup() unsafe.Pointer {
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s := "ok"
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runtime.SetFinalizer(&s, func(p *string) { close(done) })
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return unsafe.Pointer(&s)
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}
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//go:noinline
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//go:uintptrescapes
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func before(p uintptr) int {
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runtime.GC()
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select {
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case <-done:
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panic("GC early")
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default:
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}
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return 0
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}
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func after() int {
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runtime.GC()
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runtime.GC()
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<-done
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return 0
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}
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func main() {
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_ = before(uintptr(setup())) + after()
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}
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