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From: Christian Couder <christian.couder@gmail.com>
To: "Оля Тележная" <olyatelezhnaya@gmail.com>
Cc: Jeff King <peff@peff.net>, git <git@vger.kernel.org>
Subject: Re: [PATCH v2 03/18] ref-filter: make valid_atom as function parameter
Date: Thu, 18 Jan 2018 15:23:39 +0100	[thread overview]
Message-ID: <CAP8UFD1qPTh_VX8ebazxoeEHRfNjmNwy-baat9Y+GVHrHWQqFA@mail.gmail.com> (raw)
In-Reply-To: <CAL21BmneJ4rgCtf8t8LOK=gVv0MR+xam9jFBp7kp33rqEG7f6Q@mail.gmail.com>

On Thu, Jan 18, 2018 at 12:49 PM, Оля Тележная <olyatelezhnaya@gmail.com> wrote:
> 2018-01-18 9:20 GMT+03:00 Оля Тележная <olyatelezhnaya@gmail.com>:
>>
>> I think it's important to finish migrating process at first. I mean,
>> now we are preparing and collecting everything in ref-filter, but we
>> make resulting string and print still in cat-file. And I am not sure,
>> but maybe it will not be possible to start using new atoms in cat-file
>> while some part of logic still differs.
>
> I tried to make that part here:
> https://github.com/telezhnaya/git/commit/19a148614f1d4db1f8e628eb4e6d7c819d2da875
> I know that the code is disgusting and there is a memory leak :) I
> just try to reuse ref-filter logic, I will cleanup everything later.
> At first, I try to make it work.
> The problem is that I have segfault, and if I use gdb, I get:
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x0000000000000000 in ?? ()

Make sure that you compile with debug options like -g3. For example I use:

$ make -j 4 DEVELOPER=1 CFLAGS="-g3"

> I tried to google it, it's my first time when I get that strange
> message, and unfortunately find nothing. So please explain me the
> reason, why I can't find a place of segfault that way.

I get the following:

(gdb) run cat-file --batch < myarg.txt
Starting program: /home/ubuntu/bin/git cat-file --batch < myarg.txt
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".

Program received signal SIGSEGV, Segmentation fault.
0x00005555556ea7cf in format_ref_array_item (info=0x7fffffffd460,
format=0x7fffffffd6e0,
    final_buf=0x7fffffffd410) at ref-filter.c:2234
2234                    atomv->handler(atomv, &state);
(gdb) bt
#0  0x00005555556ea7cf in format_ref_array_item (info=0x7fffffffd460,
    format=0x7fffffffd6e0, final_buf=0x7fffffffd410) at ref-filter.c:2234
#1  0x00005555556ea91c in show_ref_array_item (info=0x7fffffffd460,
format=0x7fffffffd6e0)
    at ref-filter.c:2256
#2  0x0000555555577ef7 in batch_object_write (
    obj_name=0x555555a66770 "5e1c309dae7f45e0f39b1bf3ac3cd9db12e7d689",
    opt=0x7fffffffd6e0, data=0x7fffffffd5e0) at builtin/cat-file.c:298

  reply	other threads:[~2018-01-18 14:23 UTC|newest]

Thread overview: 71+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-01-09 13:05 [PATCH 01/20] cat-file: split expand_atom into 2 functions Olga Telezhnaya
2018-01-09 13:05 ` [PATCH 18/20] cat-file: add split_on_whitespace flag Olga Telezhnaya
2018-01-09 13:05 ` [PATCH 06/20] cat-file: start migrating to ref-filter Olga Telezhnaya
2018-01-09 13:05 ` [PATCH 14/20] cat-file: make populate_value global Olga Telezhnaya
2018-01-09 13:05 ` [PATCH 13/20] cat-file: start use ref_array_item struct Olga Telezhnaya
2018-01-09 13:05 ` [PATCH 16/20] cat-file: get rid of expand_atom_into_fields Olga Telezhnaya
2018-01-09 13:05 ` [PATCH 10/20] cat-file: simplify expand_atom function Olga Telezhnaya
2018-01-09 13:05 ` [PATCH 08/20] cat-file: remove unused code Olga Telezhnaya
2018-01-09 13:05 ` [PATCH 19/20] cat-file: move skip_object_info into ref-filter Olga Telezhnaya
2018-01-09 13:05 ` [PATCH 20/20] cat-file: make cat_file_info variable independent Olga Telezhnaya
2018-01-09 13:05 ` [PATCH 15/20] cat-file: start reusing populate_value Olga Telezhnaya
2018-01-09 13:05 ` [PATCH 03/20] cat-file: rename variables in ref-filter Olga Telezhnaya
2018-01-09 22:04   ` Junio C Hamano
2018-01-10  7:07     ` Оля Тележная
2018-01-09 13:05 ` [PATCH 12/20] cat-file: rename variable " Olga Telezhnaya
2018-01-09 13:05 ` [PATCH 11/20] cat-file: get rid of duplicate checking Olga Telezhnaya
2018-01-09 13:05 ` [PATCH 02/20] cat-file: reuse struct ref_format Olga Telezhnaya
2018-01-09 13:05 ` [PATCH 05/20] cat-file: move struct expand_data into ref-filter Olga Telezhnaya
2018-01-09 13:05 ` [PATCH 04/20] cat-file: make valid_atoms as a function parameter Olga Telezhnaya
2018-01-09 22:16   ` Junio C Hamano
2018-01-09 13:05 ` [PATCH 07/20] cat-file: reuse parse_ref_filter_atom Olga Telezhnaya
2018-01-09 23:32   ` Junio C Hamano
2018-01-09 13:05 ` [PATCH 17/20] cat-file: add is_cat flag in ref-filter Olga Telezhnaya
2018-01-09 13:05 ` [PATCH 09/20] cat-file: get rid of goto " Olga Telezhnaya
2018-01-10  9:36 ` [PATCH v2 01/18] cat-file: split expand_atom into 2 functions Olga Telezhnaya
2018-01-10  9:36   ` [PATCH v2 02/18] cat-file: reuse struct ref_format Olga Telezhnaya
2018-01-15 21:37     ` Jeff King
2018-01-16  9:45       ` Оля Тележная
2018-01-10  9:36   ` [PATCH v2 12/18] ref-filter: make populate_value global Olga Telezhnaya
2018-01-10  9:36   ` [PATCH v2 04/18] cat-file: move struct expand_data into ref-filter Olga Telezhnaya
2018-01-15 21:44     ` Jeff King
2018-01-16  7:00       ` Оля Тележная
2018-01-17 21:45         ` Jeff King
2018-01-18  5:56           ` Оля Тележная
2018-01-10  9:36   ` [PATCH v2 03/18] ref-filter: make valid_atom as function parameter Olga Telezhnaya
2018-01-15 21:42     ` Jeff King
2018-01-16  6:55       ` Оля Тележная
2018-01-17 21:43         ` Jeff King
2018-01-17 22:39           ` Christian Couder
2018-01-18  6:20             ` Оля Тележная
2018-01-18 11:49               ` Оля Тележная
2018-01-18 14:23                 ` Christian Couder [this message]
2018-01-19 12:24                   ` Оля Тележная
2018-01-19 15:48                     ` Christian Couder
2018-01-19 17:14               ` Christian Couder
2018-01-19 17:22                 ` Оля Тележная
2018-01-19 17:57                   ` Christian Couder
2018-01-19 17:23                 ` Jeff King
2018-01-19 17:31                   ` Christian Couder
2018-01-19 18:47                   ` Junio C Hamano
2018-01-19 20:12                     ` Jeff King
2018-01-10  9:36   ` [PATCH v2 14/18] ref-filter: get rid of expand_atom_into_fields Olga Telezhnaya
2018-01-10  9:36   ` [PATCH v2 16/18] ref_format: add split_on_whitespace flag Olga Telezhnaya
2018-01-10  9:36   ` [PATCH v2 06/18] ref-filter: reuse parse_ref_filter_atom Olga Telezhnaya
2018-01-10  9:36   ` [PATCH v2 18/18] ref-filter: make cat_file_info independent Olga Telezhnaya
2018-01-10  9:36   ` [PATCH v2 11/18] cat-file: start use ref_array_item struct Olga Telezhnaya
2018-01-10  9:36   ` [PATCH v2 17/18] cat-file: move skip_object_info into ref-filter Olga Telezhnaya
2018-01-10  9:36   ` [PATCH v2 10/18] cat-file: get rid of duplicate checking Olga Telezhnaya
2018-01-10  9:36   ` [PATCH v2 05/18] cat-file: start migrating to ref-filter Olga Telezhnaya
2018-01-10  9:36   ` [PATCH v2 13/18] cat-file: start reusing populate_value Olga Telezhnaya
2018-01-10  9:36   ` [PATCH v2 09/18] cat-file: simplify expand_atom function Olga Telezhnaya
2018-01-10  9:36   ` [PATCH v2 08/18] ref-filter: get rid of goto Olga Telezhnaya
2018-01-10  9:36   ` [PATCH v2 15/18] ref-filter: add is_cat flag Olga Telezhnaya
2018-01-10  9:36   ` [PATCH v2 07/18] cat-file: remove unused code Olga Telezhnaya
2018-01-15 21:33   ` [PATCH v2 01/18] cat-file: split expand_atom into 2 functions Jeff King
2018-01-15 22:09     ` Jeff King
2018-01-16  7:22       ` Оля Тележная
2018-01-17 21:49         ` Jeff King
2018-01-17 23:04           ` Christian Couder
2018-01-18  6:22             ` Оля Тележная
2018-01-18  8:45               ` Christian Couder

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