source: src/libcfa/bits/signal.h @ dbe9b08

aaron-thesisarm-ehcleanup-dtorsdeferred_resndemanglerjacob/cs343-translationjenkins-sandboxnew-astnew-ast-unique-exprnew-envno_listpersistent-indexerresolv-newwith_gc
Last change on this file since dbe9b08 was dbe9b08, checked in by Thierry Delisle <tdelisle@…>, 4 years ago

Spinlocks are now non-preemptive, stack-traces should print correctly

  • Property mode set to 100644
File size: 1.7 KB
Line 
1//
2// Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo
3//
4// The contents of this file are covered under the licence agreement in the
5// file "LICENCE" distributed with Cforall.
6//
7// bits/signal.h -- Helper functions and defines to use signals
8//
9// Author           : Thierry Delisle
10// Created On       : Thu Jan 25 16:06:29 2018
11// Last Modified By :
12// Last Modified On :
13// Update Count     :
14//
15
16#pragma once
17
18#include "bits/debug.h"
19#include "bits/defs.h"
20
21extern "C" {
22#include <errno.h>
23#define __USE_GNU
24#include <signal.h>
25#undef __USE_GNU
26#include <stdlib.h>
27#include <string.h>
28}
29
30// Short hands for signal context information
31#define __CFA_SIGCXT__ ucontext_t *
32#define __CFA_SIGPARMS__ __attribute__((unused)) int sig, __attribute__((unused)) siginfo_t *sfp, __attribute__((unused)) __CFA_SIGCXT__ cxt
33
34// Sigaction wrapper : register an signal handler
35static void __kernel_sigaction( int sig, void (*handler)(__CFA_SIGPARMS__), int flags ) {
36        struct sigaction act;
37
38        act.sa_sigaction = (void (*)(int, siginfo_t *, void *))handler;
39        act.sa_flags = flags;
40
41        if ( sigaction( sig, &act, NULL ) == -1 ) {
42                __cfaabi_dbg_print_buffer_decl(
43                        " __kernel_sigaction( sig:%d, handler:%p, flags:%d ), problem installing signal handler, error(%d) %s.\n",
44                        sig, handler, flags, errno, strerror( errno )
45                );
46                _exit( EXIT_FAILURE );
47        }
48}
49
50// Sigaction wrapper : restore default handler
51static void __kernel_sigdefault( int sig ) {
52        struct sigaction act;
53
54        act.sa_handler = SIG_DFL;
55        act.sa_flags = 0;
56        sigemptyset( &act.sa_mask );
57
58        if ( sigaction( sig, &act, NULL ) == -1 ) {
59                __cfaabi_dbg_print_buffer_decl(
60                        " __kernel_sigdefault( sig:%d ), problem reseting signal handler, error(%d) %s.\n",
61                        sig, errno, strerror( errno )
62                );
63                _exit( EXIT_FAILURE );
64        }
65}
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