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      1 // Copyright 2015 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 // The file contains tests that can not run under race detector for some reason.
      6 // +build !race
      7 
      8 package runtime_test
      9 
     10 import (
     11 	"runtime"
     12 	"testing"
     13 	"time"
     14 	"unsafe"
     15 )
     16 
     17 var newOSProcDone bool
     18 
     19 //go:nosplit
     20 func newOSProcCreated() {
     21 	newOSProcDone = true
     22 }
     23 
     24 // Can't be run with -race because it inserts calls into newOSProcCreated()
     25 // that require a valid G/M.
     26 func TestNewOSProc0(t *testing.T) {
     27 	runtime.NewOSProc0(0x800000, unsafe.Pointer(runtime.FuncPC(newOSProcCreated)))
     28 	check := time.NewTicker(100 * time.Millisecond)
     29 	defer check.Stop()
     30 	end := time.After(5 * time.Second)
     31 	for {
     32 		select {
     33 		case <-check.C:
     34 			if newOSProcDone {
     35 				return
     36 			}
     37 		case <-end:
     38 			t.Fatalf("couldn't create new OS process")
     39 		}
     40 	}
     41 }
     42