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fd6ba1c8a2
The syscall.AllThreadsSyscall() fixup mechanism needs to cooperate with signal handling to ensure a notetsleepg() thread can wake up to run the mDoFixup() function. Fixes #43149 Change-Id: I6651b25bc44a4de47d3fb71d0293d51aef8b79c7 Reviewed-on: https://go-review.googlesource.com/c/go/+/277434 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Go Bot <gobot@golang.org> Trust: Austin Clements <austin@google.com> Reviewed-by: Ian Lance Taylor <iant@golang.org>
43 lines
1.1 KiB
Go
43 lines
1.1 KiB
Go
// 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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// +build linux
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package signal
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import (
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"os"
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"syscall"
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"testing"
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"time"
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)
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const prSetKeepCaps = 8
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// This test validates that syscall.AllThreadsSyscall() can reliably
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// reach all 'm' (threads) of the nocgo runtime even when one thread
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// is blocked waiting to receive signals from the kernel. This monitors
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// for a regression vs. the fix for #43149.
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func TestAllThreadsSyscallSignals(t *testing.T) {
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if _, _, err := syscall.AllThreadsSyscall(syscall.SYS_PRCTL, prSetKeepCaps, 0, 0); err == syscall.ENOTSUP {
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t.Skip("AllThreadsSyscall disabled with cgo")
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}
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sig := make(chan os.Signal, 1)
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Notify(sig, os.Interrupt)
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for i := 0; i <= 100; i++ {
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if _, _, errno := syscall.AllThreadsSyscall(syscall.SYS_PRCTL, prSetKeepCaps, uintptr(i&1), 0); errno != 0 {
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t.Fatalf("[%d] failed to set KEEP_CAPS=%d: %v", i, i&1, errno)
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}
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}
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select {
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case <-time.After(10 * time.Millisecond):
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case <-sig:
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t.Fatal("unexpected signal")
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}
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Stop(sig)
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}
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