From: "Павел Крюков" <kryukov@frtk.ru>
To: Simon Marchi <simon.marchi@polymtl.ca>
Cc: gdb-patches@sourceware.org
Subject: Re: [PATCH] Make dtor of mapped_index_base virtual
Date: Sun, 31 Dec 2017 10:12:00 -0000 [thread overview]
Message-ID: <CADip9gZyJP7Dk4CUUwTzgz=fdn=fgM9BMfofTv_0Yptf2jzFZA@mail.gmail.com> (raw)
In-Reply-To: <c2b9edd5c7188446cbfb1faacacd206f@polymtl.ca>
Hi Simon
> Do you get a build error or something?
Yes, I get a build error with Clang:
dwarf2read.c:25409:5: error: destructor called on non-final 'mapped_index'
that
has virtual functions but non-virtual destructor
[-Werror,-Wdelete-non-virtual-dtor]
data->index_table->~mapped_index ();
> Since the goal is that we don't delete through a pointer of this class, does
the destructor need to be virtual (not that it would hurt anything)?
Just to handle the case if someone would delete through a pointer to
"mapped_index_base" class.
Thanks,
--
Pavel
2017-12-31 4:28 GMT+03:00 Simon Marchi <simon.marchi@polymtl.ca>:
> On 2017-12-30 13:21, Павел Крюков wrote:
>
>> gdb/Changelog:
>> 2017-12-30 Pavel I. Kryukov <kryukov@frtk.ru>
>>
>> * dwarf2read.c (mapped_index_base): Make dtor virtual
>>
>> diff --git a/gdb/ChangeLog b/gdb/ChangeLog
>> index 8555b55..fc4c1b3 100644
>> --- a/gdb/ChangeLog
>> +++ b/gdb/ChangeLog
>> @@ -1,3 +1,7 @@
>> +2017-12-30 Pavel I. Kryukov <kryukov@frtk.ru>
>> +
>> + * dwarf2read.c (mapped_index_base): Make dtor virtual
>> +
>> 2017-12-28 Simon Marchi <simon.marchi@polymtl.ca>
>>
>> * target.h (enum target_object) <TARGET_OBJECT_HPUX_UREGS,
>> diff --git a/gdb/dwarf2read.c b/gdb/dwarf2read.c
>> index 484cbce..3ac4380 100644
>> --- a/gdb/dwarf2read.c
>> +++ b/gdb/dwarf2read.c
>> @@ -272,7 +272,7 @@ struct mapped_index_base
>>
>> /* Prevent deleting/destroying via a base class pointer. */
>> protected:
>> - ~mapped_index_base() = default;
>> + virtual ~mapped_index_base() = default;
>> };
>>
>> /* A description of the mapped index. The file format is described in
>> --
>> 2.7.4
>>
>
> Hi Pavel,
>
> Can you clarify what you are trying to fix/improve with this patch? Since
> the goal is that we don't delete through a pointer of this class, does the
> destructor need to be virtual (not that it would hurt anything)? Do you
> get a build error or something?
>
> Simon
>
next prev parent reply other threads:[~2017-12-31 10:12 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-30 18:21 Павел Крюков
2017-12-31 1:28 ` Simon Marchi
2017-12-31 10:12 ` Павел Крюков [this message]
2017-12-31 13:49 ` Simon Marchi
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