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(set_float_handler): Set up signal catcher on first call in case a

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front end has disabled it.

From-SVN: r13534
This commit is contained in:
Richard Kenner 1997-01-19 21:19:04 -05:00
parent 299b54ba04
commit 3bbfa29694
1 changed files with 24 additions and 17 deletions
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41
gcc/toplev.c
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@ -1870,9 +1870,27 @@ floor_log2_wide (x)
return log;
}
static int float_handler_set;
int float_handled;
jmp_buf float_handler;
/* Signals actually come here. */
static void
float_signal (signo)
/* If this is missing, some compilers complain. */
int signo;
{
if (float_handled == 0)
abort ();
#if defined (USG) || defined (hpux)
signal (SIGFPE, float_signal); /* re-enable the signal catcher */
#endif
float_handled = 0;
signal (SIGFPE, float_signal);
longjmp (float_handler, 1);
}
/* Specify where to longjmp to when a floating arithmetic error happens.
If HANDLER is 0, it means don't handle the errors any more. */
@ -1883,6 +1901,12 @@ set_float_handler (handler)
float_handled = (handler != 0);
if (handler)
bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
if (float_handled && ! float_handler_set)
{
signal (SIGFPE, float_signal);
float_handler_set = 1;
}
}
/* Specify, in HANDLER, where to longjmp to when a floating arithmetic
@ -1917,23 +1941,6 @@ pop_float_handler (handled, handler)
bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
}
/* Signals actually come here. */
static void
float_signal (signo)
/* If this is missing, some compilers complain. */
int signo;
{
if (float_handled == 0)
abort ();
#if defined (USG) || defined (hpux)
signal (SIGFPE, float_signal); /* re-enable the signal catcher */
#endif
float_handled = 0;
signal (SIGFPE, float_signal);
longjmp (float_handler, 1);
}
/* Handler for SIGPIPE. */
static void