Re: Question about debugger
От | Neil Conway |
---|---|
Тема | Re: Question about debugger |
Дата | |
Msg-id | 1066367017.582.13.camel@tokyo обсуждение исходный текст |
Ответ на | Question about debugger (kkim3@ncsu.edu) |
Список | pgsql-hackers |
On Wed, 2003-10-15 at 11:43, kkim3@ncsu.edu wrote: > Hello, > > I'm a student who use postgresql. I'd like to debug postgres source code.I > tried to use "ddd" in linux. The thing what I want to do is debugging > backend part.How can I do that. The commands that I used until now are > following. > > 1. ddd postgres > 2. In the ddd,I tried to attach pid. (but I can't find pid about backend) > 3. When I tried to run program with break point,I met error like "can't > find 2003-10-15(that is the date and time when I run)". > > So,I'm not sure how can I use "ddd". Could let me know how can I use this? If you'd like info on using ddd, read the ddd docs or ask on their mailing list -- there shouldn't be anything particularly unique about using ddd on PostgreSQL rather than any other program that uses fork(). In any case, it's pretty straightforward to use gdb. I do the following: 1. build PostgreSQL with --enable-debug. Also, debugging is less painful if you use CFLAGS='-O0'. 2. start up PostgreSQL and connect to it 3. find the PID of the postgres backend using ps or some equivalent 4. run 'gdb -p xxx', where xxx is the PID of the postgres backend process -- then set breakpoints, and all that jazz. -Neil
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