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From: "Оля Тележная" <olyatelezhnaya@gmail.com>
To: Jeff King <peff@peff.net>
Cc: git <git@vger.kernel.org>
Subject: Re: [PATCH v3 02/23] ref-filter: add return value to some functions
Date: Thu, 15 Feb 2018 12:59:00 +0300	[thread overview]
Message-ID: <CAL21BmkQJTGYwR2BywNtsDVuMSGQVO+eWDTqTJL-WoiuAjmg0w@mail.gmail.com> (raw)
In-Reply-To: <20180215051658.GB18780@sigill.intra.peff.net>

2018-02-15 8:16 GMT+03:00 Jeff King <peff@peff.net>:
> On Mon, Feb 12, 2018 at 08:08:54AM +0000, Olga Telezhnaya wrote:
>
>> Add return flag to format_ref_array_item(), show_ref_array_item(),
>> get_ref_array_info() and populate_value() for further using.
>> Need it to handle situations when item is broken but we can not invoke
>> die() because we are in batch mode and all items need to be processed.
>
> OK. The source of these errors would eventually be calls in
> populate_value(), but we don't flag any errors there yet (well, we do,
> but they all end up in die() for now). So I'd expect to see later in the
> series those die() calls converted to errors (I haven't looked further
> yet; just making a note to myself).
>
>> --- a/ref-filter.c
>> +++ b/ref-filter.c
>> @@ -1356,8 +1356,9 @@ static const char *get_refname(struct used_atom *atom, struct ref_array_item *re
>>
>>  /*
>>   * Parse the object referred by ref, and grab needed value.
>> + * Return 0 if everything was successful, -1 otherwise.
>>   */
>
> We discussed off-list the concept that the caller may want to know one
> of three outcomes:
>
>   - we completed the request, having accessed the object
>   - we completed the request, but it didn't require accessing any
>     objects
>   - an error occurred accessing the object
>
> Since callers like "cat-file" would need to check has_sha1_file()
> manually in the second case. Should this return value actually be an
> enum, which would make it easier to convert later to a tri-state?

I decided not to implement this particular scenario because all other
callers are waiting that everything will be printed inside ref-filter.
We just add support for cat-file there. I don't think that I need to
re-think all printing process and move printing logic to all other
callers so that cat-file will behave fine. In my opinion, in the final
version cat-file must accept all ref-filter logic parts and adapt to
them.

>
>> -static void populate_value(struct ref_array_item *ref)
>> +static int populate_value(struct ref_array_item *ref)
>>  {
>>       void *buf;
>>       struct object *obj;
>> @@ -1482,7 +1483,7 @@ static void populate_value(struct ref_array_item *ref)
>>               }
>>       }
>>       if (used_atom_cnt <= i)
>> -             return;
>> +             return 0;
>
> Most of these conversions are obviously correct, because they just turn
> a void return into one with a value. But this one is trickier:
>
>> @@ -2138,9 +2144,10 @@ void format_ref_array_item(struct ref_array_item *info,
>>               ep = strchr(sp, ')');
>>               if (cp < sp)
>>                       append_literal(cp, sp, &state);
>> -             get_ref_atom_value(info,
>> -                                parse_ref_filter_atom(format, sp + 2, ep),
>> -                                &atomv);
>> +             if (get_ref_atom_value(info,
>> +                                    parse_ref_filter_atom(format, sp + 2, ep),
>> +                                    &atomv))
>> +                     return -1;
>>               atomv->handler(atomv, &state);
>>       }
>
> since it affects the control flow. Might we be skipping any necessary
> cleanup in the function if we see an error?
>
> It looks like we may have called push_stack_element(), but we'd never
> get to the end of the function where we call pop_stack_element(),
> causing us to leak.

Agree,  I will fix this.

>
> -Peff

  reply	other threads:[~2018-02-15  9:59 UTC|newest]

Thread overview: 115+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-01-26 19:43 [PATCH RFC 01/24] ref-filter: get rid of goto Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 13/24] ref-filter: add is_cat flag Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 07/24] cat-file: start migrating to ref-filter Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 24/24] cat-file: update of docs Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 10/24] ref-filter: make populate_value global Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 06/24] cat-file: move struct expand_data into ref-filter Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 14/24] ref_filter: add is_rest_atom_used function Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 16/24] ref-filter: make cat_file_info independent Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 21/24] ref-filter: work with objectsize:disk Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 15/24] cat-file: move skip_object_info into ref-filter Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 09/24] cat-file: start use ref_array_item struct Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 02/24] ref-filter: add return value to some functions Olga Telezhnaya
2018-01-26 21:05   ` Junio C Hamano
2018-01-29  7:36     ` Оля Тележная
2018-01-26 19:43 ` [PATCH RFC 17/24] cat-file: reuse printing logic from ref-filter Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 19/24] ref-filter: make populate_value internal again Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 23/24] cat-file: tests for new atoms added Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 18/24] ref-filter: make valid_atom general again Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 20/24] ref-filter: unifying formatting of cat-file opts Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 22/24] for-each-ref: tests for new atoms added Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 05/24] ref-filter: make valid_atom as function parameter Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 11/24] cat-file: start reusing populate_value Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 04/24] cat-file: reuse struct ref_format Olga Telezhnaya
2018-01-26 22:18   ` Junio C Hamano
2018-01-26 19:43 ` [PATCH RFC 08/24] ref-filter: reuse parse_ref_filter_atom Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 03/24] cat-file: split expand_atom into 2 functions Olga Telezhnaya
2018-01-26 21:46   ` Junio C Hamano
2018-01-29  7:26     ` Оля Тележная
2018-01-26 19:43 ` [PATCH RFC 12/24] ref-filter: get rid of expand_atom_into_fields Olga Telezhnaya
2018-01-26 20:19 ` [PATCH RFC 01/24] ref-filter: get rid of goto Junio C Hamano
2018-01-29  7:13   ` Оля Тележная
2018-01-30 20:49     ` Junio C Hamano
2018-01-31  6:39       ` Оля Тележная
2018-02-05 11:27 ` [PATCH RFC v2 01/25] " Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 22/25] ref-filter: work with objectsize:disk Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 12/25] cat-file: start reusing populate_value() Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 04/25] ref-filter: make valid_atom as function parameter Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 03/25] cat-file: reuse struct ref_format Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 09/25] cat-file: start use ref_array_item struct Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 23/25] for-each-ref: tests for new atoms added Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 18/25] ref-filter: make valid_atom general again Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 02/25] ref-filter: add return value to some functions Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 19/25] cat-file: reuse printing logic from ref-filter Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 21/25] ref-filter: unifying formatting of cat-file opts Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 13/25] ref-filter: get rid of mark_atom_in_object_info() Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 20/25] ref-filter: make populate_value() internal again Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 11/25] ref-filter: rename field in ref_array_item stuct Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 10/25] ref-filter: make populate_value() global Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 24/25] cat-file: tests for new atoms added Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 06/25] cat-file: split expand_atom() into 2 functions Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 25/25] cat-file: update of docs Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 05/25] cat-file: move struct expand_data into ref-filter Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 17/25] ref-filter: make cat_file_info independent Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 15/25] ref_filter: add is_atom_used function Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 08/25] ref-filter: reuse parse_ref_filter_atom() Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 07/25] cat-file: start migrating formatting to ref-filter Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 16/25] cat-file: move skip_object_info into ref-filter Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 14/25] ref-filter: add is_cat flag Olga Telezhnaya
2018-02-05 21:19     ` Junio C Hamano
2018-02-12  8:08   ` [PATCH v3 01/23] ref-filter: get rid of goto Olga Telezhnaya
2018-02-12  8:08     ` [PATCH v3 12/23] cat-file: start reusing populate_value() Olga Telezhnaya
2018-02-15  5:42       ` Jeff King
2018-02-12  8:08     ` [PATCH v3 20/23] ref-filter: unifying formatting of cat-file opts Olga Telezhnaya
2018-02-15  5:56       ` Jeff King
2018-02-15 10:34         ` Оля Тележная
2018-02-15 18:31           ` Junio C Hamano
2018-02-12  8:08     ` [PATCH v3 05/23] cat-file: move struct expand_data into ref-filter Olga Telezhnaya
2018-02-15  5:26       ` Jeff King
2018-02-12  8:08     ` [PATCH v3 11/23] ref-filter: rename field in ref_array_item stuct Olga Telezhnaya
2018-02-12  8:08     ` [PATCH v3 16/23] ref-filter: make cat_file_info independent Olga Telezhnaya
2018-02-15  5:53       ` Jeff King
2018-02-15 10:33         ` Оля Тележная
2018-02-16 21:54           ` Jeff King
2018-02-12  8:08     ` [PATCH v3 22/23] cat-file: tests for new atoms added Olga Telezhnaya
2018-02-16 14:55       ` Adam Dinwoodie
2018-02-18 22:55         ` Ramsay Jones
2018-02-19  1:04           ` Ramsay Jones
2018-02-12  8:08     ` [PATCH v3 04/23] ref-filter: make valid_atom as function parameter Olga Telezhnaya
2018-02-15  5:23       ` Jeff King
2018-02-15 10:03         ` Оля Тележная
2018-02-12  8:08     ` [PATCH v3 15/23] cat-file: move skip_object_info into ref-filter Olga Telezhnaya
2018-02-15  5:51       ` Jeff King
2018-02-15 10:27         ` Оля Тележная
2018-02-12  8:08     ` [PATCH v3 10/23] ref-filter: make populate_value() global Olga Telezhnaya
2018-02-12  8:08     ` [PATCH v3 07/23] cat-file: start migrating formatting to ref-filter Olga Telezhnaya
2018-02-15  5:32       ` Jeff King
2018-02-12  8:08     ` [PATCH v3 14/23] ref_filter: add is_atom_used function Olga Telezhnaya
2018-02-15  5:49       ` Jeff King
2018-02-15 10:20         ` Оля Тележная
2018-02-12  8:08     ` [PATCH v3 18/23] cat-file: reuse printing logic from ref-filter Olga Telezhnaya
2018-02-12  8:08     ` [PATCH v3 17/23] ref-filter: make valid_atom general again Olga Telezhnaya
2018-02-15  5:53       ` Jeff King
2018-02-12  8:08     ` [PATCH v3 21/23] for-each-ref: tests for new atoms added Olga Telezhnaya
2018-02-15  5:57       ` Jeff King
2018-02-15 10:38         ` Оля Тележная
2018-02-12  8:08     ` [PATCH v3 23/23] cat-file: update of docs Olga Telezhnaya
2018-02-15  6:00       ` Jeff King
2018-02-12  8:08     ` [PATCH v3 03/23] cat-file: reuse struct ref_format Olga Telezhnaya
2018-02-15  5:18       ` Jeff King
2018-02-12  8:08     ` [PATCH v3 09/23] cat-file: start use ref_array_item struct Olga Telezhnaya
2018-02-15  5:40       ` Jeff King
2018-02-15 10:13         ` Оля Тележная
2018-02-12  8:08     ` [PATCH v3 06/23] cat-file: split expand_atom() into 2 functions Olga Telezhnaya
2018-02-15  5:28       ` Jeff King
2018-02-12  8:08     ` [PATCH v3 13/23] ref-filter: get rid of mark_atom_in_object_info() Olga Telezhnaya
2018-02-15  5:45       ` Jeff King
2018-02-15 10:19         ` Оля Тележная
2018-02-12  8:08     ` [PATCH v3 08/23] ref-filter: reuse parse_ref_filter_atom() Olga Telezhnaya
2018-02-15  5:37       ` Jeff King
2018-02-15 10:11         ` Оля Тележная
2018-02-12  8:08     ` [PATCH v3 02/23] ref-filter: add return value to some functions Olga Telezhnaya
2018-02-15  5:16       ` Jeff King
2018-02-15  9:59         ` Оля Тележная [this message]
2018-02-12  8:08     ` [PATCH v3 19/23] ref-filter: make populate_value() internal again Olga Telezhnaya
2018-02-15  5:08     ` [PATCH v3 01/23] ref-filter: get rid of goto Jeff King

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