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e84d9e1fb3
Split stack checks (morestack) corrupt g->sched, but g->sched must be preserved consistent for GC/traceback. The change implements runtime.notetsleepg function, which does entersyscall/exitsyscall and is carefully arranged to not call any split functions in between. R=rsc CC=golang-dev https://golang.org/cl/11575044
35 lines
758 B
Go
35 lines
758 B
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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// Futex is only available on Linux and FreeBSD.
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// The race detector emits calls to split stack functions so it breaks the test.
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// +build linux freebsd
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// +build !race
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package runtime_test
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import (
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. "runtime"
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"testing"
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"time"
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)
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func TestFutexsleep(t *testing.T) {
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ch := make(chan bool, 1)
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var dummy uint32
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start := time.Now()
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go func() {
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Entersyscall()
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Futexsleep(&dummy, 0, (1<<31+100)*1e9)
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Exitsyscall()
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ch <- true
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}()
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select {
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case <-ch:
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t.Errorf("futexsleep finished early after %s!", time.Since(start))
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case <-time.After(time.Second):
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Futexwakeup(&dummy, 1)
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}
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}
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