Hello, I am trying to compile git with debug symbols and failed to do so (basically I am a noob), can some one direct me to links or mailing list (have searched but couldn't find) or doc's so that I can debug git using gdb.
thanks, mpujari
David KastrupRe: git compile with debug symbols
Mahesh Pujari <pujarimahesh_kumar@yahoo.com> writes:
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> Hello, > I am trying to compile git with debug symbols and failed to do so > (basically I am a noob), can some one direct me to links or mailing > list (have searched but couldn't find) or doc's so that I can debug > git using gdb.
git is compiled with debug symbols by default.
-- David Kastrup
Matthieu MoyRe: git compile with debug symbols
David Kastrup <dak@gnu.org> writes:
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> Mahesh Pujari <pujarimahesh_kumar@yahoo.com> writes: > >> Hello, >> I am trying to compile git with debug symbols and failed to do so >> (basically I am a noob), can some one direct me to links or mailing >> list (have searched but couldn't find) or doc's so that I can debug >> git using gdb. > > git is compiled with debug symbols by default.
... but:
1) some Git commands are shell-scripts, on which you can't use gdb.
2) some Git commands fork other commands, and then you have to deal with multiple processes (i.e. putting a breakpoint in a piece of code executed by the subprocess won't work if gdb is running on the other one).
-- Matthieu Moy http://www-verimag.imag.fr/~moy/
Re: git compile with debug symbols
Thanks David for the reply. I think I need to do more ground work of going through how to use gdb. Basically I am java programmer and I was trying out to debug git source using eclipse CDT and as we do in java, I was trying out to set break point but failed with errors as "No line 396 in file "help.c"". And using gdb too I end up with same error.
# (gdb) break help.c:396 # No line 396 in file "help.c".
Am I missing something.
thanks, mpujari
On Tuesday, March 4, 2014 9:34 PM, Matthieu Moy <Matthieu.Moy@grenoble-inp.fr> wrote: David Kastrup <dak@gnu.org> writes:
Show 9 quoted lines
> Mahesh Pujari <pujarimahesh_kumar@yahoo.com> writes: > >> Hello, >> I am trying to compile git with debug symbols and failed to do so >> (basically I am a noob), can some one direct me to links or mailing >> list (have searched but couldn't find) or doc's so that I can debug >> git using gdb. > > git is compiled with debug symbols by default.
... but:
1) some Git commands are shell-scripts, on which you can't use gdb.
2) some Git commands fork other commands, and then you have to deal with multiple processes (i.e. putting a breakpoint in a piece of code executed by the subprocess won't work if gdb is running on the other
one).
-- Matthieu Moy http://www-verimag.imag.fr/~moy/
David KastrupRe: git compile with debug symbols
Mahesh Pujari <pujarimahesh_kumar@yahoo.com> writes:
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> Thanks David for the reply. I think I need to do more ground work of > going through how to use gdb. > Basically I am java programmer and I was trying out to debug git > source using eclipse CDT and as we do in java, I was trying out to set > break point but failed with errors as "No line 396 in file "help.c"". > And using gdb too I end up with same error. > > # (gdb) break help.c:396 > # No line 396 in file "help.c". > > > Am I missing something.
There is just no line 396 known to gdb. It seems like you are indicating a function header. That's not code. Either take the function _name_ rather than a line number (that's usually most reliable) or take the first line of actual code.
-- David Kastrup
Re: git compile with debug symbols
Hello all, Thanks for replying back, figured out (offcourse had to search in net) that 'gdb' version I had was 6.7.1 (OS Ubuntu 12.04 LST), not sure how I got this. Then I upgraded gdb to version 7.4-2012.04 and things got going.
thanks, mpujari
On Tuesday, March 4, 2014 10:13 PM, David Kastrup <dak@gnu.org> wrote: Mahesh Pujari <pujarimahesh_kumar@yahoo.com> writes:
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> Thanks David for the reply. I think I need to do more ground work of > going through how to use gdb. > Basically I am java programmer and I was trying out to debug git > source using eclipse CDT and as we do in java, I was trying out to set > break point but failed with errors as "No line 396 in file "help.c"". > And using gdb too I end up with same error. > > # (gdb) break help.c:396 > # No line 396 in file "help.c". > > > Am I missing something.
There is just no line 396 known to gdb. It seems like you are indicating a function header. That's not code. Either take the function _name_ rather than a line number (that's usually most reliable) or take the first line of actual code.
-- David Kastrup
karthik nayakRe: git compile with debug symbols
A quick look at the Makefile shows that -g is enabled by default. so debugging is enabled by default
On Tue, Mar 4, 2014 at 9:16 PM, Mahesh Pujari <pujarimahesh_kumar@yahoo.com> wrote:
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> > > Hello, > I am trying to compile git with debug symbols and failed to do so (basically I am a noob), can some one direct me to links or mailing list (have searched but couldn't find) or doc's so that I can debug git using gdb. > > thanks, > mpujari > > -- > To unsubscribe from this list: send the line "unsubscribe git" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html
Tanay AbhraRe: git compile with debug symbols
Mahesh Pujari <pujarimahesh_kumar <at> yahoo.com> writes:
> > > Hello, > I am trying to compile git with debug symbols and failed to do so
(basically I am a noob), can some one direct
> me to links or mailing list (have searched but couldn't find) or doc's so
that I can debug git using gdb.
Show 5 quoted lines
> > thanks, > mpujari > >
Hi,
I tried to put a break point at help.c:396 and it was successful . I think that the problem is either your symbols are not loaded. Nevertheless I will walk you through the steps.
$ git clone https://github.com/git/git $ make $ gdb ./git $(gdb)> gdb break help.c:396 Breakpoint 1 at 0x80f8b40: file help.c, line 396.
Cheers, Tanay Abhra.