src/SDL_fatal.c
changeset 0 74212992fb08
child 1 cf2af46e9e2a
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/SDL_fatal.c	Thu Apr 26 16:45:43 2001 +0000
@@ -0,0 +1,160 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001  Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Sam Lantinga
+    slouken@devolution.com
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id$";
+#endif
+
+/* General fatal signal handling code for SDL */
+
+#ifdef NO_SIGNAL_H
+
+/* No signals on this platform, nothing to do.. */
+
+void SDL_InstallParachute(void)
+{
+	return;
+}
+
+void SDL_UninstallParachute(void)
+{
+	return;
+}
+
+#else
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <signal.h>
+#include <string.h>
+
+#include "SDL.h"
+#include "SDL_fatal.h"
+
+/* This installs some signal handlers for the more common fatal signals,
+   so that if the programmer is lazy, the app doesn't die so horribly if
+   the program crashes.
+*/
+
+static void SDL_Parachute(int sig)
+{
+	signal(sig, SIG_DFL);
+	fprintf(stderr, "Fatal signal: ");
+	switch (sig) {
+		case SIGSEGV:
+			fprintf(stderr, "Segmentation Fault");
+			break;
+#ifdef SIGBUS
+#if SIGBUS != SIGSEGV
+		case SIGBUS:
+			fprintf(stderr, "Bus Error");
+			break;
+#endif
+#endif /* SIGBUS */
+#ifdef SIGFPE
+		case SIGFPE:
+			fprintf(stderr, "Floating Point Exception");
+			break;
+#endif /* SIGFPE */
+#ifdef SIGQUIT
+		case SIGQUIT:
+			fprintf(stderr, "Keyboard Quit");
+			break;
+#endif /* SIGQUIT */
+#ifdef SIGPIPE
+		case SIGPIPE:
+			fprintf(stderr, "Broken Pipe");
+			break;
+#endif /* SIGPIPE */
+		default:
+			fprintf(stderr, "# %d", sig);
+			break;
+	}
+	fprintf(stderr, " (SDL Parachute Deployed)\n");
+	SDL_Quit();
+	exit(-sig);
+}
+
+static int SDL_fatal_signals[] = {
+	SIGSEGV,
+#ifdef SIGBUS
+	SIGBUS,
+#endif
+#ifdef SIGFPE
+	SIGFPE,
+#endif
+#ifdef SIGQUIT
+	SIGQUIT,
+#endif
+#ifdef SIGPIPE
+	SIGPIPE,
+#endif
+	0
+};
+
+void SDL_InstallParachute(void)
+{
+	int i;
+	void (*ohandler)(int);
+
+	/* Set a handler for any fatal signal not already handled */
+	for ( i=0; SDL_fatal_signals[i]; ++i ) {
+		ohandler = signal(SDL_fatal_signals[i], SDL_Parachute);
+		if ( ohandler != SIG_DFL ) {
+			signal(SDL_fatal_signals[i], ohandler);
+		}
+	}
+#ifdef SIGALRM
+	/* Set SIGALRM to be ignored -- necessary on Solaris */
+	{
+		struct sigaction action, oaction;
+
+		/* Set SIG_IGN action */
+		memset(&action, 0, (sizeof action));
+		action.sa_handler = SIG_IGN;
+		sigaction(SIGALRM, &action, &oaction);
+
+		/* Reset original action if it was already being handled */
+		if ( oaction.sa_handler != SIG_DFL ) {
+			sigaction(SIGALRM, &oaction, NULL);
+		}
+	}
+#endif
+	return;
+}
+
+void SDL_UninstallParachute(void)
+{
+	int i;
+	void (*ohandler)(int);
+
+	/* Remove a handler for any fatal signal handled */
+	for ( i=0; SDL_fatal_signals[i]; ++i ) {
+		ohandler = signal(SDL_fatal_signals[i], SIG_DFL);
+		if ( ohandler != SDL_Parachute ) {
+			signal(SDL_fatal_signals[i], ohandler);
+		}
+	}
+}
+
+#endif /* NO_SIGNAL_H */