how to debug into InitPostgres() and InitCatalogCache()?

От

土卜皿

Тема

Дата

5 августа 2014 г. в 14:08:56

Msg-id

CADT5_1-Mbo9+QurdvsbXDMn=5dxWqULunqa+HW7wsruZm-iUng@mail.gmail.com

обсуждение

Список

pgsql-hackers

Дерево обсуждения

how to debug into InitPostgres() and InitCatalogCache()? 土卜皿 <pengcz.nwpu@gmail.com> 5 августа 2014 г. в 14:08:56

Re: how to debug into InitPostgres() and InitCatalogCache()? 土卜皿 <pengcz.nwpu@gmail.com> 6 августа 2014 г. в 01:11:25

Re: how to debug into InitPostgres() and InitCatalogCache()? Alvaro Herrera <alvherre@2ndquadrant.com> 6 августа 2014 г. в 02:37:36

hi, all

I already can debug general postgres using "ddd" and "select pg_backend_pid();" , now, I want to study the details of the system catalog cache and system cache management, so I need to debug the function InitPostgres() and InitCatalogCache(), and I tried the following steps:

[refer: How to debug postgresql during initdb ]

(1) in first terminal:

ddd initdb

and set a breakpoint on the next executable line after “PG_CMD_OPEN” in function bootstrap_template1() ,

Then within gdb, use “r $myfolder/mydb”,

and found the cursor stop at the breakpoint

(2) in the second terminal:

ps aux | grep "bin\/postgres"

after get the posgtres server pid, start a new ddd without args, and within gdb, using "attach postgres.pid"

and set a breakpoint as InitCatalogCache()

(3) back to the first ddd window, hit the "cont" button. I hope it can stop at the second ddd's breakpoint, but nothing happened?

I must make mistake in some step, or my understanding is fully wrong, please give me some advice, thanks a lot!

Dillon

В списке pgsql-hackers по дате отправления

Предыдущее

От: Roberto Mello

Дата: 5 августа 2014 г. в 14:04:01

Сообщение: Re: PostrgeSQL vs oracle doing 1 million sqrts am I doing it wrong?

Следующее

От: Fujii Masao

Дата: 5 августа 2014 г. в 14:34:17

Сообщение: Re: Audit of logout