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Date: Tue, 14 Feb 2012 09:22:39 -0800 (PST)
Reply-To: Adi Mutu <adi_mutu06@yahoo.com>
To: jpauli <jpauli@php.net>
Cc: =?iso-8859-1?Q?=C1ngel_Gonz=E1lez?= <keisial@gmail.com>,
  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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Thanks Julien....=0A=0AI don't know french, but i'll read it using google t=
ranslate:)=0A=0A=0A________________________________=0A From: jpauli <jpauli=
@php.net>=0ATo: Adi Mutu <adi_mutu06@yahoo.com> =0ACc: =C1ngel Gonz=E1lez <=
keisial@gmail.com>; PHP Developers Mailing List <internals@lists.php.net> =
=0ASent: Tuesday, February 14, 2012 11:17 AM=0ASubject: Re: [PHP-DEV] how t=
o debug a php script ( the C code beneath it)=0A =0A2012/2/14 Adi Mutu <adi=
_mutu06@yahoo.com>=0A=0A> Perhaps i didn't explain correctly, my bad, sorry=
.=0A> Basically what I want to see is the corresponding C code which is=0A>=
 executed, i could put a break in gdb, but how do I know at which C functio=
n=0A> to put it, if i don't know the internals of php very good?=0A>=0A=0AA=
nd the answer is : you cant.=0ASimply put, you have to study the code first=
, before knowing through which=0Aline it will go.=0AThat's not very easy, a=
s you can count on ~800.000 lines in trunk.=0A=0ATo see the path, use valgr=
ind + callgrind. You'll get a very cool graph=0Alike this :=0Ahttp://julien=
-pauli.developpez.com/tutoriels/php/internals/presentation/images/PHPIntern=
als-callgraph.png=0A=0AYou could use gdb with the .gdbinit from trunk. Usin=
g it with CDT is much=0Amore cool as it is GUI.=0A=0AI wrote some article a=
bout PHP internals, mainly describing how it works.=0AIt's in french (=0Aht=
tp://julien-pauli.developpez.com/tutoriels/php/internals/presentation)=0Awi=
th some schema.=0A=0AMainly, the hardest part is ZendVM. If you dont have t=
o debug ZendVM, it's=0Akinda "easy" and logic.=0A=0ACheers=0A=0AJulien.Paul=
i=0A=0A=0A=0A>=0A> ________________________________=0A>=A0 From: =C1ngel Go=
nz=E1lez <keisial@gmail.com>=0A> To: Adi Mutu <adi_mutu06@yahoo.com>=0A> Cc=
: PHP Developers Mailing List <internals@lists.php.net>=0A> Sent: Tuesday, =
February 14, 2012 1:11 AM=0A> Subject: Re: [PHP-DEV] how to debug a php scr=
ipt ( the C code beneath it)=0A>=0A> On 13/02/12 21:48, Adi Mutu wrote:=0A>=
 > Hello,=0A> >=0A> > Perhaps this is a stupid question, but i haven't code=
d in C in years and=0A> i'm not very familiar with development/debugging to=
ols. If I have a php=0A> script say 20 lines,=0A> > How can I see a path of=
 the corresponding C code which is executed? What=0A> If i would like to br=
eak at a certain php line in the script, is it=0A> possible?=0A> >=0A> > Th=
anks,=0A> Why do you want to do it?=0A> It looks to me like that you are tr=
ying to solve a problem the hard way=0A> by doing that.=0A>
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