Re: how to debug a php script ( the C code beneath it)

I know about the zif_* functions and i'm already using lxr.php.net. Didn't know about gcc -E trick though, that might be usefull. Thanks. ________________________________ From: jpauli <jpauli@php.net> To: Rasmus Lerdorf <rasmus@php.net> Cc: Adi Mutu <adi_mutu06@yahoo.com>; PHP Developers Mailing List <internals@lists.php.net> Sent: Tuesday, February 14, 2012 7:36 PM Subject: Re: [PHP-DEV] how to debug a php script ( the C code beneath it) On Tue, Feb 14, 2012 at 6:28 PM, Rasmus Lerdorf <rasmus@php.net> wrote: On 02/14/2012 09:22 AM, Adi Mutu wrote: >> Thanks Julien.... >> >> I don't know french, but i'll read it using google translate:) > >If you just want to see some of the function calls, most calls that are >visible in userspace are prefixed with "zif_" internally. > >eg. > >% gdb sapi/cli/php >GNU gdb (Ubuntu/Linaro 7.3-0ubuntu2) 7.3-2011.08 >... >(gdb) b zif_strlen >Breakpoint 1 at 0x7b2760: file >/home/rasmus/php-src/branches/PHP_5_3/Zend/zend_builtin_functions.c, >line 455. >(gdb) run -r 'echo strlen("123");' >Breakpoint 1, zif_strlen (ht=1, return_value=0x1200eb0, >return_value_ptr=0x0, this_ptr=0x0, return_value_used=1) >   at >/home/rasmus/php-src/branches/PHP_5_3/Zend/zend_builtin_functions.c:455 >455     { >(gdb) l >450 >451 >452     /* {{{ proto int strlen(string str) >453        Get string length */ >454     ZEND_FUNCTION(strlen) >455     { >456             char *s1; >457             int s1_len; > >-Rasmus > > >-- >PHP Internals - PHP Runtime Development Mailing List >To unsubscribe, visit: http://www.php.net/unsub.php > > Yeah, that's the PHP_FUNCTION() macro. 'zif' meaning "Zend Internal Function". One more step would be to read the preprocessed code (GCC -E), as PHP source heavily uses macros If you want, you can also read the source code online using the excellent http://lxr.php.net :) Julien.P