# git compile with debug symbols 8 messages from 2014-03-04 to 2014-03-05. Participants: Mahesh Pujari, David Kastrup, karthik nayak, Matthieu Moy, Tanay Abhra. Thread: https://gitlist.dev/t/36050 ## Mahesh Pujari, 2014-03-04 15:46 Subject: git compile with debug symbols Message-ID: <1393947964.16150.YahooMailNeo@web162902.mail.bf1.yahoo.com> URL: https://gitlist.dev/e/1393947964.16150.YahooMailNeo%40web162902.mail.bf1.yahoo.com ``` 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 Kastrup, 2014-03-04 15:53 Subject: Re: git compile with debug symbols Message-ID: <87a9d6hsf3.fsf@fencepost.gnu.org> URL: https://gitlist.dev/e/87a9d6hsf3.fsf%40fencepost.gnu.org In-Reply-To: <1393947964.16150.YahooMailNeo@web162902.mail.bf1.yahoo.com> ``` Mahesh Pujari 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. -- David Kastrup ``` ## karthik nayak, 2014-03-04 16:00 Subject: Re: git compile with debug symbols Message-ID: URL: https://gitlist.dev/e/CAOLa%3DZRAtOkLAQS89G59%3DKHvCvuBQ_ptU1ACSqh%3D%3Dww29-7NKg%40mail.gmail.com In-Reply-To: <1393947964.16150.YahooMailNeo@web162902.mail.bf1.yahoo.com> ``` 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 wrote: > > > 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 ``` ## Matthieu Moy, 2014-03-04 16:03 Subject: Re: git compile with debug symbols Message-ID: URL: https://gitlist.dev/e/vpqtxbene6o.fsf%40anie.imag.fr In-Reply-To: <87a9d6hsf3.fsf@fencepost.gnu.org> ``` David Kastrup writes: > Mahesh Pujari 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/ ``` ## Mahesh Pujari, 2014-03-04 16:33 Subject: Re: git compile with debug symbols Message-ID: <1393950801.57403.YahooMailNeo@web162903.mail.bf1.yahoo.com> URL: https://gitlist.dev/e/1393950801.57403.YahooMailNeo%40web162903.mail.bf1.yahoo.com In-Reply-To: ``` 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 wrote: David Kastrup writes: > Mahesh Pujari 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 Kastrup, 2014-03-04 16:43 Subject: Re: git compile with debug symbols Message-ID: <8761ntj4ny.fsf@fencepost.gnu.org> URL: https://gitlist.dev/e/8761ntj4ny.fsf%40fencepost.gnu.org In-Reply-To: <1393950801.57403.YahooMailNeo@web162903.mail.bf1.yahoo.com> ``` Mahesh Pujari writes: > 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 ``` ## Tanay Abhra, 2014-03-04 17:53 Subject: Re: git compile with debug symbols Message-ID: URL: https://gitlist.dev/e/loom.20140304T184714-119%40post.gmane.org In-Reply-To: <1393947964.16150.YahooMailNeo@web162902.mail.bf1.yahoo.com> ``` Mahesh Pujari 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. > > 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. ``` ## Mahesh Pujari, 2014-03-05 06:27 Subject: Re: git compile with debug symbols Message-ID: <1394000820.21154.YahooMailNeo@web162905.mail.bf1.yahoo.com> URL: https://gitlist.dev/e/1394000820.21154.YahooMailNeo%40web162905.mail.bf1.yahoo.com In-Reply-To: <8761ntj4ny.fsf@fencepost.gnu.org> ``` 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 wrote: Mahesh Pujari writes: > 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 ```