// Copyright 2012 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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package runtime_test
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import (
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. "runtime"
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"syscall"
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"testing"
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"time"
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"unsafe"
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)
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var pid, tid int
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func init() {
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// Record pid and tid of init thread for use during test.
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// The call to LockOSThread is just to exercise it;
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// we can't test that it does anything.
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// Instead we're testing that the conditions are good
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// for how it is used in init (must be on main thread).
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pid, tid = syscall.Getpid(), syscall.Gettid()
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LockOSThread()
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sysNanosleep = func(d time.Duration) {
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// Invoke a blocking syscall directly; calling time.Sleep()
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// would deschedule the goroutine instead.
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ts := syscall.NsecToTimespec(d.Nanoseconds())
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for {
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if err := syscall.Nanosleep(&ts, &ts); err != syscall.EINTR {
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return
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}
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}
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}
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}
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func TestLockOSThread(t *testing.T) {
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if pid != tid {
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t.Fatalf("pid=%d but tid=%d", pid, tid)
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}
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}
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// Test that error values are negative. Use address 1 (a misaligned
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// pointer) to get -EINVAL.
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func TestMincoreErrorSign(t *testing.T) {
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var dst byte
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v := Mincore(unsafe.Pointer(uintptr(1)), 1, &dst)
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const EINVAL = 0x16
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if v != -EINVAL {
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t.Errorf("mincore = %v, want %v", v, -EINVAL)
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}
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}
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func TestEpollctlErrorSign(t *testing.T) {
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v := Epollctl(-1, 1, -1, unsafe.Pointer(&struct{}{}))
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const EBADF = 0x09
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if v != -EBADF {
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t.Errorf("epollctl = %v, want %v", v, -EBADF)
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}
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}
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