* User-defined macros and C string
@ 2003-07-30 11:47 Daniel Chiaramello
2003-07-30 12:56 ` Daniel Jacobowitz
0 siblings, 1 reply; 3+ messages in thread
From: Daniel Chiaramello @ 2003-07-30 11:47 UTC (permalink / raw)
To: gdb
Hi gdb gurus.
Well, I'm a total gdb newbie, so sorry if the question sounds stupid...
I failed to find a forum on which I could post it, so... Here is it!
I try to define a user-defined macro, to display parameters used when a
specific function is called.
IE there a the following function:
void dosomething (long theValue, char *theString) {...}
I want to put a breakpoint on that function and display a line like
that:
"dosomething(10, "coucou");\n"
each time that function is called.
Of course, that function is not in my code, and the caller is not
either.
I tried the following:
define DisplayFunctionCall
echo dosomething(
output $r3
output , \"
output $r4
echo \");\n
end
I planned to put a breakpoint at the function entrance, and then
execute my macro:
b *<the function addr>
command $bpnum
> DisplayFunctionCall
> continue
> end
But the output I get is:
dosomething(0, "145ae0");
dosomething(1, "145be0");
dosomething(2, "145ce0");
dosomething(3, "145de0");
ie the content of the r4 register (I'm on a PowerPC machine) is not
dumped as a C string, but its value is displayed...
Is there a way to display the C string pointed to by r4, in its
simplest form, ie only the C string? x/s $r4 displays the C string, but
also its address as well as the estimated position in a function...
echo $r4 displays a "$r4" string...
I hope you understand what I am trying to do...
Thanks for your attention,
Daniel, aka Souricette
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: User-defined macros and C string
2003-07-30 11:47 User-defined macros and C string Daniel Chiaramello
@ 2003-07-30 12:56 ` Daniel Jacobowitz
2003-07-30 13:14 ` Daniel Chiaramello
0 siblings, 1 reply; 3+ messages in thread
From: Daniel Jacobowitz @ 2003-07-30 12:56 UTC (permalink / raw)
To: gdb
On Wed, Jul 30, 2003 at 01:47:41PM +0200, Daniel Chiaramello wrote:
> Hi gdb gurus.
>
> Well, I'm a total gdb newbie, so sorry if the question sounds stupid...
> I failed to find a forum on which I could post it, so... Here is it!
>
> I try to define a user-defined macro, to display parameters used when a
> specific function is called.
>
> IE there a the following function:
>
> void dosomething (long theValue, char *theString) {...}
>
> I want to put a breakpoint on that function and display a line like
> that:
> "dosomething(10, "coucou");\n"
> each time that function is called.
>
> Of course, that function is not in my code, and the caller is not
> either.
>
> I tried the following:
> define DisplayFunctionCall
> echo dosomething(
> output $r3
> output , \"
> output $r4
> echo \");\n
> end
Try "help printf". Works just like the C version.
--
Daniel Jacobowitz
MontaVista Software Debian GNU/Linux Developer
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: User-defined macros and C string
2003-07-30 12:56 ` Daniel Jacobowitz
@ 2003-07-30 13:14 ` Daniel Chiaramello
0 siblings, 0 replies; 3+ messages in thread
From: Daniel Chiaramello @ 2003-07-30 13:14 UTC (permalink / raw)
To: gdb
Thanks, that's exactly what I needed!!!
Daniel.
Le mercredi, 30 juil 2003, à 14:56 Europe/Paris, Daniel Jacobowitz a
écrit :
> On Wed, Jul 30, 2003 at 01:47:41PM +0200, Daniel Chiaramello wrote:
>> Hi gdb gurus.
>>
>> Well, I'm a total gdb newbie, so sorry if the question sounds
>> stupid...
>> I failed to find a forum on which I could post it, so... Here is it!
>>
>> I try to define a user-defined macro, to display parameters used when
>> a
>> specific function is called.
>>
>> IE there a the following function:
>>
>> void dosomething (long theValue, char *theString) {...}
>>
>> I want to put a breakpoint on that function and display a line like
>> that:
>> "dosomething(10, "coucou");\n"
>> each time that function is called.
>>
>> Of course, that function is not in my code, and the caller is not
>> either.
>>
>> I tried the following:
>> define DisplayFunctionCall
>> echo dosomething(
>> output $r3
>> output , \"
>> output $r4
>> echo \");\n
>> end
>
> Try "help printf". Works just like the C version.
>
> --
> Daniel Jacobowitz
> MontaVista Software Debian GNU/Linux Developer
>
^ permalink raw reply [flat|nested] 3+ messages in thread
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