tsan10.go

     1  // Copyright 2017 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 main
     6  
     7  // This program hung when run under the C/C++ ThreadSanitizer.
     8  // TSAN defers asynchronous signals until the signaled thread calls into libc.
     9  // Since the Go runtime makes direct futex syscalls, Go runtime threads could
    10  // run for an arbitrarily long time without triggering the libc interceptors.
    11  // See https://golang.org/issue/18717.
    12  
    13  import (
    14  	"os"
    15  	"os/signal"
    16  	"syscall"
    17  )
    18  
    19  /*
    20  #cgo CFLAGS: -g -fsanitize=thread
    21  #cgo LDFLAGS: -g -fsanitize=thread
    22  */
    23  import "C"
    24  
    25  func main() {
    26  	c := make(chan os.Signal, 1)
    27  	signal.Notify(c, syscall.SIGUSR1)
    28  	defer signal.Stop(c)
    29  	syscall.Kill(syscall.Getpid(), syscall.SIGUSR1)
    30  	<-c
    31  }
    32
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