What are the procedures to use self declared convenience functions in GDB?

What are the procedures to use self declared convenience functions in GDB?

[Nagmat Nazar]

I have implemented a convenience function on python in order to use it on
GDB. What shall I do in order to use it on GDB. As I know the convenience
functions are located in

~/gdb/python/lib/gdb/function/

I have copied context_checker.py into this folder but it is not working.
What other procedures shall I do in order to use the convenience function
on GDB?


https://stackoverflow.com/questions/64815891/what-are-the-procedures-to-use-self-declared-convenience-functions-in-gdb



Kind regards

Nagmat Nazarov

Re: What are the procedures to use self declared convenience functions in GDB?

[Simon Marchi]

On 2020-11-17 4:03 a.m., Nagmat Nazar via Gdb wrote:
> I have implemented a convenience function on python in order to use it on
> GDB. What shall I do in order to use it on GDB. As I know the convenience
> functions are located in
> 
> ~/gdb/python/lib/gdb/function/
> 
> I have copied context_checker.py into this folder but it is not working.
> What other procedures shall I do in order to use the convenience function
> on GDB?
> 
> 
> https://stackoverflow.com/questions/64815891/what-are-the-procedures-to-use-self-declared-convenience-functions-in-gdb
> 
> 
> 
> Kind regards
> 
> Nagmat Nazarov
> 

IIRC, you can use them with $ followed by the name of the function.  So if you declaire a function foo, use $foo(...).

Simon

Re: What are the procedures to use self declared convenience functions in GDB?

[Simon Marchi]

On 2020-11-18 12:18 a.m., Nagmat Nazar wrote:
> Dear Simon, 
> 
> I have written convenience function as on explanation: 
> https://sourceware.org/gdb/onlinedocs/gdb/Functions-In-Python.html
> greet.py 
> ``` 
> 
> class Greet (gdb.Function):
>   """Return string to greet someone.
> Takes a name as argument."""
> 
>   def __init__ (self):
>     super (Greet, self).__init__ ("greet")
> 
>   def invoke (self, name):
>     return "Hello, %s!" % name.string ()
> 
> Greet ()
> 
> ```
> image.png
> 
> I have placed greet.py into ~/gdb/python/lib/gdb/function/, but as you see on the picture it still gives error. What else shall I do in order to use this function?
> 
> Kind regards
> Nagmat

Just putting the file in ~/gdb/python/lib/gdb/function/ won't magically load it.

You should either use the source command inside GDB (or in a .gdbinit) or the -x switch when starting GDB.

Simon

RE: What are the procedures to use self declared convenience functions in GDB?

[Aktemur, Tankut Baris]

On Wednesday, November 18, 2020 9:39 PM, Simon Marchi wrote:
> On 2020-11-18 12:18 a.m., Nagmat Nazar wrote:
> > Dear Simon,
> >
> > I have written convenience function as on explanation:
> > https://sourceware.org/gdb/onlinedocs/gdb/Functions-In-Python.html
> > greet.py
> > ```
> >
> > class Greet (gdb.Function):
> >   """Return string to greet someone.
> > Takes a name as argument."""
> >
> >   def __init__ (self):
> >     super (Greet, self).__init__ ("greet")
> >
> >   def invoke (self, name):
> >     return "Hello, %s!" % name.string ()
> >
> > Greet ()
> >
> > ```
> > image.png
> >
> > I have placed greet.py into ~/gdb/python/lib/gdb/function/, but as you see on the picture
> it still gives error. What else shall I do in order to use this function?
> >
> > Kind regards
> > Nagmat
> 
> Just putting the file in ~/gdb/python/lib/gdb/function/ won't magically load it.
> 
> You should either use the source command inside GDB (or in a .gdbinit) or the -x switch when
> starting GDB.
> 
> Simon

If you list the file name in gdb/data-directory/Makefile.in's PYTHON_FILE_LIST, I believe
it's loaded automatically at GDB startup time.

-Baris


Intel Deutschland GmbH
Registered Address: Am Campeon 10-12, 85579 Neubiberg, Germany
Tel: +49 89 99 8853-0, www.intel.de
Managing Directors: Christin Eisenschmid, Gary Kershaw
Chairperson of the Supervisory Board: Nicole Lau
Registered Office: Munich
Commercial Register: Amtsgericht Muenchen HRB 186928

Re: What are the procedures to use self declared convenience functions in GDB?

[Nagmat Nazar]

Dear Mr. Baris,

Thanks for your response, I have added it to Makefile.in as you told me,
but it is not functioning. How can I check If it was loaded or not?

Kind regards,
Nagmat

On Thu, Nov 19, 2020 at 4:48 PM Aktemur, Tankut Baris <
tankut.baris.aktemur@intel.com> wrote:

> On Wednesday, November 18, 2020 9:39 PM, Simon Marchi wrote:
> > On 2020-11-18 12:18 a.m., Nagmat Nazar wrote:
> > > Dear Simon,
> > >
> > > I have written convenience function as on explanation:
> > > https://sourceware.org/gdb/onlinedocs/gdb/Functions-In-Python.html
> > > greet.py
> > > ```
> > >
> > > class Greet (gdb.Function):
> > >   """Return string to greet someone.
> > > Takes a name as argument."""
> > >
> > >   def __init__ (self):
> > >     super (Greet, self).__init__ ("greet")
> > >
> > >   def invoke (self, name):
> > >     return "Hello, %s!" % name.string ()
> > >
> > > Greet ()
> > >
> > > ```
> > > image.png
> > >
> > > I have placed greet.py into ~/gdb/python/lib/gdb/function/, but as you
> see on the picture
> > it still gives error. What else shall I do in order to use this function?
> > >
> > > Kind regards
> > > Nagmat
> >
> > Just putting the file in ~/gdb/python/lib/gdb/function/ won't magically
> load it.
> >
> > You should either use the source command inside GDB (or in a .gdbinit)
> or the -x switch when
> > starting GDB.
> >
> > Simon
>
> If you list the file name in gdb/data-directory/Makefile.in's
> PYTHON_FILE_LIST, I believe
> it's loaded automatically at GDB startup time.
>
> -Baris
>
>
> Intel Deutschland GmbH
> Registered Address: Am Campeon 10-12, 85579 Neubiberg, Germany
> Tel: +49 89 99 8853-0, www.intel.de
> Managing Directors: Christin Eisenschmid, Gary Kershaw
> Chairperson of the Supervisory Board: Nicole Lau
> Registered Office: Munich
> Commercial Register: Amtsgericht Muenchen HRB 186928
>

Re: What are the procedures to use self declared convenience functions in GDB?

[Christian Biesinger]

On Thu, Nov 19, 2020 at 9:34 AM Nagmat Nazar via Gdb <gdb@sourceware.org> wrote:
>
> Dear Mr. Baris,
>
> Thanks for your response, I have added it to Makefile.in as you told me,
> but it is not functioning. How can I check If it was loaded or not?

Did you verify that it gets installed with the other python files? And
you are using "import greet" when using it?

Christian

>
> Kind regards,
> Nagmat
>
> On Thu, Nov 19, 2020 at 4:48 PM Aktemur, Tankut Baris <
> tankut.baris.aktemur@intel.com> wrote:
>
> > On Wednesday, November 18, 2020 9:39 PM, Simon Marchi wrote:
> > > On 2020-11-18 12:18 a.m., Nagmat Nazar wrote:
> > > > Dear Simon,
> > > >
> > > > I have written convenience function as on explanation:
> > > > https://sourceware.org/gdb/onlinedocs/gdb/Functions-In-Python.html
> > > > greet.py
> > > > ```
> > > >
> > > > class Greet (gdb.Function):
> > > >   """Return string to greet someone.
> > > > Takes a name as argument."""
> > > >
> > > >   def __init__ (self):
> > > >     super (Greet, self).__init__ ("greet")
> > > >
> > > >   def invoke (self, name):
> > > >     return "Hello, %s!" % name.string ()
> > > >
> > > > Greet ()
> > > >
> > > > ```
> > > > image.png
> > > >
> > > > I have placed greet.py into ~/gdb/python/lib/gdb/function/, but as you
> > see on the picture
> > > it still gives error. What else shall I do in order to use this function?
> > > >
> > > > Kind regards
> > > > Nagmat
> > >
> > > Just putting the file in ~/gdb/python/lib/gdb/function/ won't magically
> > load it.
> > >
> > > You should either use the source command inside GDB (or in a .gdbinit)
> > or the -x switch when
> > > starting GDB.
> > >
> > > Simon
> >
> > If you list the file name in gdb/data-directory/Makefile.in's
> > PYTHON_FILE_LIST, I believe
> > it's loaded automatically at GDB startup time.
> >
> > -Baris
> >
> >
> > Intel Deutschland GmbH
> > Registered Address: Am Campeon 10-12, 85579 Neubiberg, Germany
> > Tel: +49 89 99 8853-0, www.intel.de
> > Managing Directors: Christin Eisenschmid, Gary Kershaw
> > Chairperson of the Supervisory Board: Nicole Lau
> > Registered Office: Munich
> > Commercial Register: Amtsgericht Muenchen HRB 186928
> >

RE: What are the procedures to use self declared convenience functions in GDB?

[Aktemur, Tankut Baris]

On Thursday, November 19, 2020 11:39 AM, Christian Biesinger wrote:
> On Thu, Nov 19, 2020 at 9:34 AM Nagmat Nazar via Gdb <gdb@sourceware.org> wrote:
> >
> > Dear Mr. Baris,
> >
> > Thanks for your response, I have added it to Makefile.in as you told me,
> > but it is not functioning. How can I check If it was loaded or not?
> 
> Did you verify that it gets installed with the other python files? And
> you are using "import greet" when using it?
> 
> Christian

Hi Nagmat,

Assuming you did "make install" first, you can check if the file is installed
by looking at the share/gdb/python/gdb/function/ folder in the install directory.

If you did not "make install" but started gdb from its build directory, you may have
to pass the --data-directory flag.  Like this:

$ my-gdb-build-dir/gdb/gdb --data-directory=my-gdb-build-dir/gdb/data-directory

-Baris


Intel Deutschland GmbH
Registered Address: Am Campeon 10-12, 85579 Neubiberg, Germany
Tel: +49 89 99 8853-0, www.intel.de
Managing Directors: Christin Eisenschmid, Gary Kershaw
Chairperson of the Supervisory Board: Nicole Lau
Registered Office: Munich
Commercial Register: Amtsgericht Muenchen HRB 186928