| 1 | //
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| 2 | // Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo
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| 3 | //
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| 4 | // The contents of this file are covered under the licence agreement in the
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| 5 | // file "LICENCE" distributed with Cforall.
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| 6 | //
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| 7 | // bits/signal.hfa -- Helper functions and defines to use signals
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| 8 | //
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| 9 | // Author : Thierry Delisle
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| 10 | // Created On : Thu Jan 25 16:06:29 2018
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| 11 | // Last Modified By :
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| 12 | // Last Modified On :
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| 13 | // Update Count :
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| 14 | //
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| 15 |
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| 16 | #pragma once
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| 17 |
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| 18 | #include "bits/debug.hfa"
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| 19 | #include "bits/defs.hfa"
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| 20 |
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| 21 | extern "C" {
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| 22 | #include <errno.h>
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| 23 | #define __USE_GNU
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| 24 | #include <signal.h>
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| 25 | #undef __USE_GNU
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| 26 | #include <stdlib.h>
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| 27 | #include <string.h>
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| 28 | }
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| 29 |
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| 30 | // Short hands for signal context information
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| 31 | #define __CFA_SIGCXT__ ucontext_t *
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| 32 | #define __CFA_SIGPARMS__ __attribute__((unused)) int sig, __attribute__((unused)) siginfo_t *sfp, __attribute__((unused)) __CFA_SIGCXT__ cxt
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| 33 |
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| 34 | // Sigaction wrapper : register an signal handler
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| 35 | static void __cfaabi_sigaction( int sig, void (*handler)(__CFA_SIGPARMS__), int flags ) {
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| 36 | struct sigaction act;
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| 37 |
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| 38 | act.sa_sigaction = (void (*)(int, siginfo_t *, void *))handler;
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| 39 | sigemptyset( &act.sa_mask );
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| 40 | sigaddset( &act.sa_mask, SIGALRM ); // disabled during signal handler
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| 41 | sigaddset( &act.sa_mask, SIGUSR1 );
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| 42 | sigaddset( &act.sa_mask, SIGSEGV );
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| 43 | sigaddset( &act.sa_mask, SIGBUS );
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| 44 | sigaddset( &act.sa_mask, SIGILL );
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| 45 | sigaddset( &act.sa_mask, SIGFPE );
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| 46 | sigaddset( &act.sa_mask, SIGHUP ); // revert to default on second delivery
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| 47 | sigaddset( &act.sa_mask, SIGTERM );
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| 48 | sigaddset( &act.sa_mask, SIGINT );
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| 49 | act.sa_flags = flags;
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| 50 |
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| 51 | if ( sigaction( sig, &act, 0p ) == -1 ) {
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| 52 | __cfaabi_dbg_print_buffer_decl(
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| 53 | " __cfaabi_sigaction( sig:%d, handler:%p, flags:%d ), problem installing signal handler, error(%d) %s.\n",
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| 54 | sig, handler, flags, errno, strerror( errno )
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| 55 | );
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| 56 | _Exit( EXIT_FAILURE );
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| 57 | } // if
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| 58 | }
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