Re: Overflow exception

php will core dump (SIGFPE) in the following conditions: Any time a op->value.dval <= -2147483649 or >= 2147483648 and it is converted to long as such: op->value.lval = (long) op->value.dval; I've got two ways to fix this: check to see if it is out of range and return without the conversion spewing out a warning. or trap the SIGFPE by using signal(SIGFPE, handler) let the bits get lost and spew out a warning. Of course there may be other ways of fixing the problem. Any ideas? Curt * Curt Zirzow (curt@zirzow.org) [000524 14:45]: > This is related to bug #2962 but I've narrowed it down to it > affecting all conversions from a double to int where there > is a overflow exception. > > > FreeBSD 3.2 > Php 4.0.0 > Apache/1.3.9 > > <? > $var = 2147483647+1; //or < -2147483648 > echo $var."<br>\n"; > settype($var, 'string'); //removing this makes a SIGFPE > settype($var, 'integer'); > settype($var, 'double'); > echo $var."<br>\n"; //overflow!! > > ?> > > Program received signal SIGFPE, Arithmetic exception. > 0x809cbea in convert_to_long_base (op=0x821358c, base=10) > at zend_operators.c:203 > 203 op->value.lval = (long) op->value.dval; > (gdb) backtrace > #0 0x809cbea in convert_to_long_base (op=0x821358c, base=10) > at zend_operators.c:203 > #1 0x809cb95 in convert_to_long (op=0x821358c) at zend_operators.c:185 > #2 0x80c3079 in php_if_settype (ht=2, return_value=0x82135ac, this_ptr=0x0, > return_value_used=0) at basic_functions.c:1057 > #3 0x80f82fd in execute (op_array=0x8211e0c) at ./zend_execute.c:1574 > #4 0x8090b29 in php_execute_script (primary_file=0xbfbfd5d0) at main.c:1200 > #5 0x80a9c3d in apache_php_module_main (r=0x821a034, fd=30, > display_source_mode=0) at sapi_apache.c:93 > #6 0x808d18e in send_php () > #7 0x808d1d0 in send_parsed_php () > #8 0x8117f7b in ap_invoke_handler () > #9 0x812aa01 in process_request_internal () > #10 0x812aa60 in ap_process_request () > #11 0x81224a9 in child_main () > #12 0x8122634 in make_child () > #13 0x812278f in startup_children () > #14 0x8122d40 in standalone_main () > #15 0x8123593 in main () > #16 0x8060829 in _start () -- Any time things appear to be going better, you have overlooked something.