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519474451a
This is a subset of https://golang.org/cl/20022 with only the copyright header lines, so the next CL will be smaller and more reviewable. Go policy has been single space after periods in comments for some time. The copyright header template at: https://golang.org/doc/contribute.html#copyright also uses a single space. Make them all consistent. Change-Id: Icc26c6b8495c3820da6b171ca96a74701b4a01b0 Reviewed-on: https://go-review.googlesource.com/20111 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
57 lines
1.2 KiB
Go
57 lines
1.2 KiB
Go
// Copyright 2013 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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// Only works on systems with syscall.Close.
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// We need a fast system call to provoke the race,
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// and Close(-1) is nearly universally fast.
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// +build darwin dragonfly freebsd linux netbsd openbsd plan9
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package runtime_test
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import (
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"runtime"
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"sync"
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"sync/atomic"
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"syscall"
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"testing"
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)
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func TestGoroutineProfile(t *testing.T) {
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// GoroutineProfile used to use the wrong starting sp for
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// goroutines coming out of system calls, causing possible
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// crashes.
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defer runtime.GOMAXPROCS(runtime.GOMAXPROCS(100))
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var stop uint32
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defer atomic.StoreUint32(&stop, 1) // in case of panic
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var wg sync.WaitGroup
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for i := 0; i < 4; i++ {
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wg.Add(1)
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go func() {
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for atomic.LoadUint32(&stop) == 0 {
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syscall.Close(-1)
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}
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wg.Done()
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}()
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}
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max := 10000
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if testing.Short() {
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max = 100
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}
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stk := make([]runtime.StackRecord, 128)
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for n := 0; n < max; n++ {
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_, ok := runtime.GoroutineProfile(stk)
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if !ok {
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t.Fatalf("GoroutineProfile failed")
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}
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}
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// If the program didn't crash, we passed.
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atomic.StoreUint32(&stop, 1)
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wg.Wait()
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}
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