/* -----------------------------------------------------------------------------
- * $Id: Signals.c,v 1.15 2000/03/15 15:31:36 simonmar Exp $
+ * $Id: Signals.c,v 1.20 2001/07/26 03:24:01 ken Exp $
*
* (c) The GHC Team, 1998-1999
*
*
* ---------------------------------------------------------------------------*/
+#define NON_POSIX_SOURCE
+
#include "Rts.h"
#include "SchedAPI.h"
#include "Schedule.h"
#include "RtsFlags.h"
#include "StablePriv.h"
+#ifdef alpha_TARGET_ARCH
+#include <machine/fpu.h>
+#endif
+
#ifndef mingw32_TARGET_OS
#ifndef PAR
+/* SUP: The type of handlers is a little bit, well, doubtful... */
static StgInt *handlers = NULL; /* Dynamically grown array of signal handlers */
static StgInt nHandlers = 0; /* Size of handlers array */
circumstances, depending on the signal.
*/
- *next_pending_handler++ = deRefStablePtr(handlers[sig]);
+ *next_pending_handler++ = deRefStablePtr(stgCast(StgStablePtr,handlers[sig]));
/* stack full? */
if (next_pending_handler == &pending_handler_buf[N_PENDING_HANDLERS]) {
-------------------------------------------------------------------------- */
StgInt
-sig_install(StgInt sig, StgInt spi, StgStablePtr handler, sigset_t *mask)
+stg_sig_install(StgInt sig, StgInt spi, StgStablePtr handler, sigset_t *mask)
{
sigset_t signals;
struct sigaction action;
break;
default:
- barf("sig_install: bad spi");
+ barf("stg_sig_install: bad spi");
}
if (mask != 0)
* by freeing the previous handler if there was one.
*/
if (previous_spi >= 0) {
- freeStablePtr(handlers[sig]);
+ freeStablePtr(stgCast(StgStablePtr,handlers[sig]));
}
return STG_SIG_ERR;
}
#else /* PAR */
StgInt
-sig_install(StgInt sig, StgInt spi, StgStablePtr handler, sigset_t *mask)
+stg_sig_install(StgInt sig, StgInt spi, StgStablePtr handler, sigset_t *mask)
{
/* don't fflush(stdout); WORKAROUND bug in Linux glibc */
barf("no signal handling support in a parallel implementation");
} else
#endif
- interruptStgRts();
+ /* If we're already trying to interrupt the RTS, terminate with
+ * extreme prejudice. So the first ^C tries to exit the program
+ * cleanly, and the second one just kills it.
+ */
+ if (interrupted) {
+ exit(EXIT_INTERRUPTED);
+ } else {
+ interruptStgRts();
+ }
}
/*
* fine, provided they're so kind as to put back the old one
* when they de-install.
*
- * We ignore SIGPIPE, because our I/O library handles EPIPE properly,
- * and a SIGPIPE tends to cause the program to exit silently and
- * mysteriously.
+ * In addition to handling SIGINT, the RTS also handles SIGFPE
+ * by ignoring it. Apparently IEEE requires floating-point
+ * exceptions to be ignored by default, but alpha-dec-osf3
+ * doesn't seem to do so.
*/
void
init_default_handlers()
prog_belch("failed to install SIGINT handler");
}
+ siginterrupt(SIGINT, 1);
+
action.sa_handler = SIG_IGN;
- if (sigaction(SIGPIPE, &action, &oact) != 0) {
- prog_belch("failed to install SIGINT handler");
+ sigemptyset(&action.sa_mask);
+ action.sa_flags = 0;
+ if (sigaction(SIGFPE, &action, &oact) != 0) {
+ /* Oh well, at least we tried. */
+ prog_belch("failed to install SIGFPE handler");
}
+#ifdef alpha_TARGET_ARCH
+ ieee_set_fp_control(0);
+#endif
}
#endif /*! mingw32_TARGET_OS */