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Date: Tue, 14 Feb 2012 09:51:07 -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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=0A=0AI 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=0AThank=
s.=0A=0A=0A________________________________=0A From: jpauli <jpauli@php.net=
>=0ATo: Rasmus Lerdorf <rasmus@php.net> =0ACc: Adi Mutu <adi_mutu06@yahoo.c=
om>; PHP Developers Mailing List <internals@lists.php.net> =0ASent: Tuesday=
, February 14, 2012 7:36 PM=0ASubject: Re: [PHP-DEV] how to debug a php scr=
ipt ( the C code beneath it)=0A =0AOn Tue, Feb 14, 2012 at 6:28 PM, Rasmus =
Lerdorf <rasmus@php.net> wrote:=0A=0A> On 02/14/2012 09:22 AM, Adi Mutu wro=
te:=0A> > Thanks Julien....=0A> >=0A> > I don't know french, but i'll read =
it using google translate:)=0A>=0A> If you just want to see some of the fun=
ction calls, most calls that are=0A> visible in userspace are prefixed with=
 "zif_" internally.=0A>=0A> eg.=0A>=0A> % gdb sapi/cli/php=0A> GNU gdb (Ubu=
ntu/Linaro 7.3-0ubuntu2) 7.3-2011.08=0A> ...=0A> (gdb) b zif_strlen=0A> Bre=
akpoint 1 at 0x7b2760: file=0A> /home/rasmus/php-src/branches/PHP_5_3/Zend/=
zend_builtin_functions.c,=0A> line 455.=0A> (gdb) run -r 'echo strlen("123"=
);'=0A> Breakpoint 1, zif_strlen (ht=3D1, return_value=3D0x1200eb0,=0A> ret=
urn_value_ptr=3D0x0, this_ptr=3D0x0, return_value_used=3D1)=0A>=A0 =A0 at=
=0A> /home/rasmus/php-src/branches/PHP_5_3/Zend/zend_builtin_functions.c:45=
5=0A> 455=A0 =A0  {=0A> (gdb) l=0A> 450=0A> 451=0A> 452=A0 =A0  /* {{{ prot=
o int strlen(string str)=0A> 453=A0 =A0 =A0 =A0 Get string length */=0A> 45=
4=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> -Ras=
mus=0A>=0A> --=0A> PHP Internals - PHP Runtime Development Mailing List=0A>=
 To unsubscribe, visit: http://www.php.net/unsub.php=0A>=0A>=0AYeah, that's=
 the PHP_FUNCTION() macro. 'zif' meaning "Zend Internal=0AFunction".=0AOne =
more step would be to read the preprocessed code (GCC -E), as PHP=0Asource =
heavily uses macros=0A=0AIf you want, you can also read the source code onl=
ine using the excellent=0Ahttp://lxr.php.net :)=0A=0AJulien.P
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