mirror of
https://github.com/golang/go
synced 2024-11-12 12:50:28 -07:00
0829e1b757
Change-Id: I62a7a8ebbbc1f1a266234b53680768da157b2df5 Reviewed-on: https://go-review.googlesource.com/130416 Run-TryBot: Ian Lance Taylor <iant@golang.org> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
60 lines
1.4 KiB
C
60 lines
1.4 KiB
C
// Copyright 2015 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.
|
|
|
|
#include <signal.h>
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
struct sigaction sa;
|
|
struct sigaction osa;
|
|
|
|
static void (*oldHandler)(int, siginfo_t*, void*);
|
|
|
|
static void handler(int signo, siginfo_t* info, void* ctxt) {
|
|
if (oldHandler) {
|
|
oldHandler(signo, info, ctxt);
|
|
}
|
|
}
|
|
|
|
int install_handler() {
|
|
// Install our own signal handler.
|
|
memset(&sa, 0, sizeof sa);
|
|
sa.sa_sigaction = handler;
|
|
sigemptyset(&sa.sa_mask);
|
|
sa.sa_flags = SA_ONSTACK | SA_SIGINFO;
|
|
memset(&osa, 0, sizeof osa);
|
|
sigemptyset(&osa.sa_mask);
|
|
if (sigaction(SIGSEGV, &sa, &osa) < 0) {
|
|
perror("sigaction");
|
|
return 2;
|
|
}
|
|
if (osa.sa_handler == SIG_DFL) {
|
|
fprintf(stderr, "Go runtime did not install signal handler\n");
|
|
return 2;
|
|
}
|
|
// gccgo does not set SA_ONSTACK for SIGSEGV.
|
|
if (getenv("GCCGO") == "" && (osa.sa_flags&SA_ONSTACK) == 0) {
|
|
fprintf(stderr, "Go runtime did not install signal handler\n");
|
|
return 2;
|
|
}
|
|
oldHandler = osa.sa_sigaction;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int check_handler() {
|
|
if (sigaction(SIGSEGV, NULL, &sa) < 0) {
|
|
perror("sigaction check");
|
|
return 2;
|
|
}
|
|
if (sa.sa_sigaction != handler) {
|
|
fprintf(stderr, "ERROR: wrong signal handler: %p != %p\n", sa.sa_sigaction, handler);
|
|
return 2;
|
|
}
|
|
return 0;
|
|
}
|
|
|