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