1 // Copyright 2012 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 package runtime_test 6 7 import ( 8 . "runtime" 9 "syscall" 10 "testing" 11 "time" 12 "unsafe" 13 ) 14 15 var pid, tid int 16 17 func init() { 18 // Record pid and tid of init thread for use during test. 19 // The call to LockOSThread is just to exercise it; 20 // we can't test that it does anything. 21 // Instead we're testing that the conditions are good 22 // for how it is used in init (must be on main thread). 23 pid, tid = syscall.Getpid(), syscall.Gettid() 24 LockOSThread() 25 26 sysNanosleep = func(d time.Duration) { 27 // Invoke a blocking syscall directly; calling time.Sleep() 28 // would deschedule the goroutine instead. 29 ts := syscall.NsecToTimespec(d.Nanoseconds()) 30 for { 31 if err := syscall.Nanosleep(&ts, &ts); err != syscall.EINTR { 32 return 33 } 34 } 35 } 36 } 37 38 func TestLockOSThread(t *testing.T) { 39 if pid != tid { 40 t.Fatalf("pid=%d but tid=%d", pid, tid) 41 } 42 } 43 44 // Test that error values are negative. Use address 1 (a misaligned 45 // pointer) to get -EINVAL. 46 func TestMincoreErrorSign(t *testing.T) { 47 var dst byte 48 v := Mincore(unsafe.Pointer(uintptr(1)), 1, &dst) 49 50 const EINVAL = 0x16 51 if v != -EINVAL { 52 t.Errorf("mincore = %v, want %v", v, -EINVAL) 53 } 54 } 55
