src/runtime/norace_linux_test.go

   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 cannot run under race detector for some reason.
   6 //
   7 //go:build !race
   8
   9 package runtime_test
  10
  11 import (
  12         "internal/abi"
  13         "runtime"
  14         "testing"
  15         "time"
  16         "unsafe"
  17 )
  18
  19 var newOSProcDone bool
  20
  21 //go:nosplit
  22 func newOSProcCreated() {
  23         newOSProcDone = true
  24 }
  25
  26 // Can't be run with -race because it inserts calls into newOSProcCreated()
  27 // that require a valid G/M.
  28 func TestNewOSProc0(t *testing.T) {
  29         runtime.NewOSProc0(0x800000, unsafe.Pointer(abi.FuncPCABIInternal(newOSProcCreated)))
  30         check := time.NewTicker(100 * time.Millisecond)
  31         defer check.Stop()
  32         end := time.After(5 * time.Second)
  33         for {
  34                 select {
  35                 case <-check.C:
  36                         if newOSProcDone {
  37                                 return
  38                         }
  39                 case <-end:
  40                         t.Fatalf("couldn't create new OS process")
  41                 }
  42         }
  43 }