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- // Copyright 2017 The Go Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style
- // license that can be found in the LICENSE file.
- package main
- // This program failed with SIGSEGV when run under the C/C++ ThreadSanitizer.
- // The Go runtime had re-registered the C handler with the wrong flags due to a
- // typo, resulting in null pointers being passed for the info and context
- // parameters to the handler.
- /*
- #cgo CFLAGS: -fsanitize=thread
- #cgo LDFLAGS: -fsanitize=thread
- #include <signal.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <ucontext.h>
- void check_params(int signo, siginfo_t *info, void *context) {
- ucontext_t* uc = (ucontext_t*)(context);
- if (info->si_signo != signo) {
- fprintf(stderr, "info->si_signo does not match signo.\n");
- abort();
- }
- if (uc->uc_stack.ss_size == 0) {
- fprintf(stderr, "uc_stack has size 0.\n");
- abort();
- }
- }
- // Set up the signal handler in a high priority constructor, so
- // that it is installed before the Go code starts.
- static void register_handler(void) __attribute__ ((constructor (200)));
- static void register_handler() {
- struct sigaction sa;
- memset(&sa, 0, sizeof(sa));
- sigemptyset(&sa.sa_mask);
- sa.sa_flags = SA_SIGINFO;
- sa.sa_sigaction = check_params;
- if (sigaction(SIGUSR1, &sa, NULL) != 0) {
- perror("failed to register SIGUSR1 handler");
- exit(EXIT_FAILURE);
- }
- }
- */
- import "C"
- import "syscall"
- func init() {
- C.raise(C.int(syscall.SIGUSR1))
- }
- func main() {}
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