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Date: Tue, 14 Feb 2012 09:58:08 -0800 (PST)
Reply-To: Adi Mutu <adi_mutu06@yahoo.com>
To: jpauli <jpauli@php.net>, Rasmus Lerdorf <rasmus@php.net>
Cc: PHP Developers Mailing List <internals@lists.php.net>
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Subject: Re: [PHP-DEV] how to debug a php script ( the C code beneath it)
From: adi_mutu06@yahoo.com (Adi Mutu)

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I know about the zif_* functions and i'm already using lxr.php.net.=0ADidn'=
t know about gcc -E trick though, that might be usefull.=0A=0AThanks.=0A=0A=
=0A________________________________=0A From: jpauli <jpauli@php.net>=0ATo: =
Rasmus Lerdorf <rasmus@php.net> =0ACc: Adi Mutu <adi_mutu06@yahoo.com>; PHP=
 Developers Mailing List <internals@lists.php.net> =0ASent: Tuesday, Februa=
ry 14, 2012 7:36 PM=0ASubject: Re: [PHP-DEV] how to debug a php script ( th=
e C code beneath it)=0A =0A=0AOn Tue, Feb 14, 2012 at 6:28 PM, Rasmus Lerdo=
rf <rasmus@php.net> wrote:=0A=0AOn 02/14/2012 09:22 AM, Adi Mutu wrote:=0A>=
> Thanks Julien....=0A>>=0A>> I don't know french, but i'll read it using g=
oogle translate:)=0A>=0A>If you just want to see some of the function calls=
, most calls that are=0A>visible in userspace are prefixed with "zif_" inte=
rnally.=0A>=0A>eg.=0A>=0A>% gdb sapi/cli/php=0A>GNU gdb (Ubuntu/Linaro 7.3-=
0ubuntu2) 7.3-2011.08=0A>...=0A>(gdb) b zif_strlen=0A>Breakpoint 1 at 0x7b2=
760: file=0A>/home/rasmus/php-src/branches/PHP_5_3/Zend/zend_builtin_functi=
ons.c,=0A>line 455.=0A>(gdb) run -r 'echo strlen("123");'=0A>Breakpoint 1, =
zif_strlen (ht=3D1, return_value=3D0x1200eb0,=0A>return_value_ptr=3D0x0, th=
is_ptr=3D0x0, return_value_used=3D1)=0A>=A0 =A0at=0A>/home/rasmus/php-src/b=
ranches/PHP_5_3/Zend/zend_builtin_functions.c:455=0A>455 =A0 =A0 {=0A>(gdb)=
 l=0A>450=0A>451=0A>452 =A0 =A0 /* {{{ proto int strlen(string str)=0A>453 =
=A0 =A0 =A0 =A0Get string length */=0A>454 =A0 =A0 ZEND_FUNCTION(strlen)=0A=
>455 =A0 =A0 {=0A>456 =A0 =A0 =A0 =A0 =A0 =A0 char *s1;=0A>457 =A0 =A0 =A0 =
=A0 =A0 =A0 int s1_len;=0A>=0A>-Rasmus=0A>=0A>=0A>--=0A>PHP Internals - PHP=
 Runtime Development Mailing List=0A>To unsubscribe, visit: http://www.php.=
net/unsub.php=0A>=0A>=0A=0AYeah, that's the PHP_FUNCTION() macro. 'zif' mea=
ning "Zend Internal Function".=0AOne more step would be to read the preproc=
essed code (GCC -E), as PHP source=A0heavily=A0uses macros=0A=0AIf you want=
, you can also read the source code online using the excellent http://lxr.p=
hp.net :)=0A=0AJulien.P
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