mirror of
https://github.com/golang/go
synced 2024-11-08 19:36:22 -07:00
0f57c88bce
This fix is analogous to the one in CL 407888. 'go vet' catches the error, but it is not run on this file because the file is (only) compiled when running testsanitizers/TestTSAN. Fixes #53113. Change-Id: I74f7b7390a9775ff00a06214c1019ba28846dd11 Reviewed-on: https://go-review.googlesource.com/c/go/+/409094 Auto-Submit: Bryan Mills <bcmills@google.com> Reviewed-by: Cherry Mui <cherryyz@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Run-TryBot: Bryan Mills <bcmills@google.com>
56 lines
1.2 KiB
Go
56 lines
1.2 KiB
Go
// Copyright 2017 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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// This program hung when run under the C/C++ ThreadSanitizer. TSAN defers
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// asynchronous signals until the signaled thread calls into libc. The runtime's
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// sysmon goroutine idles itself using direct usleep syscalls, so it could
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// run for an arbitrarily long time without triggering the libc interceptors.
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// See https://golang.org/issue/18717.
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import (
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"os"
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"os/signal"
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"syscall"
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)
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/*
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#cgo CFLAGS: -g -fsanitize=thread
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#cgo LDFLAGS: -g -fsanitize=thread
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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static void raise_usr2(int signo) {
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raise(SIGUSR2);
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}
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static void register_handler(int signo) {
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struct sigaction sa;
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memset(&sa, 0, sizeof(sa));
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sigemptyset(&sa.sa_mask);
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sa.sa_flags = SA_ONSTACK;
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sa.sa_handler = raise_usr2;
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if (sigaction(SIGUSR1, &sa, NULL) != 0) {
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perror("failed to register SIGUSR1 handler");
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exit(EXIT_FAILURE);
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}
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}
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*/
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import "C"
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func main() {
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ch := make(chan os.Signal, 1)
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signal.Notify(ch, syscall.SIGUSR2)
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C.register_handler(C.int(syscall.SIGUSR1))
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syscall.Kill(syscall.Getpid(), syscall.SIGUSR1)
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<-ch
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}
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