From: mosteo@gmail.com (Alex R. Mosteo)
Subject: Re: Memory leak - What the ...?
Date: 11 Oct 2004 01:59:47 -0700
Date: 2004-10-11T01:59:47-07:00 [thread overview]
Message-ID: <dcb57d1e.0410110059.3064896@posting.google.com> (raw)
In-Reply-To: mailman.270.1097458825.390.comp.lang.ada@ada-france.org
Stephen Leake <stephen_leake@acm.org> wrote in message news:<mailman.270.1097458825.390.comp.lang.ada@ada-france.org>...
> mosteo@gmail.com (Alex R. Mosteo) writes:
>
> > Hi,
> >
> > as the topic says, this post is about some code which leaks. I'm now
> > sure of having trapped the leak, but I don't understand where is my
> > error.
>
> Please post a complete compilable example, so I can run it with gnat 5.02a1.
Here's the example. Gnatmem shows that it leaks heavily. So I must
have understood something really wrong about controlled types. I need
to get this right.
The example will create 1000 messages and then delete them
overwritting them with an empty value.
I suppose gnatchop will suffice (beware: use ./test and not simply
test):
with Ada.Finalization;
with Ada.Streams; use Ada.Streams;
package Test_Aux is
type Stream_Element_Array_Access is access
Ada.Streams.Stream_Element_Array;
type Udp_Message is new Ada.Finalization.Controlled with record
Data : Stream_Element_Array_Access;
end record;
------------
-- Create --
------------
function Create (Data : in Stream_Element_Array) return
Udp_Message;
procedure Adjust (This : in out Udp_Message);
procedure Finalize (This : in out Udp_Message);
end Test_Aux;
with Ada.Unchecked_Deallocation;
package body Test_Aux is
------------
-- Create --
------------
function Create (Data : in Stream_Element_Array) return Udp_Message
is
Msg : Udp_Message :=
(Ada.Finalization.Controlled with
Data => new Stream_Element_Array'(Data));
begin
return Msg;
end Create;
procedure Adjust (This : in out Udp_Message) is
begin
if This.Data /= null then
This.Data := new Stream_Element_Array'(This.Data.all);
end if;
end Adjust;
procedure Finalize (This : in out Udp_Message) is
procedure Free is new Ada.Unchecked_Deallocation (
Stream_Element_Array, Stream_Element_Array_Access);
begin
Free (This.Data);
end Finalize;
end Test_Aux;
with Ada.Exceptions;
with Ada.Streams; use Ada.Streams;
use Ada;
with Text_IO; use Text_IO;
with Test_Aux; use Test_Aux;
procedure Test is
Empty : Udp_Message;
Arr : array (1 .. 1000) of Udp_Message;
begin
Text_Io.Put_Line ("Adding...");
for I in Arr'Range loop
Arr (I) := Create ((1 .. Stream_Element_Offset (I) =>
Stream_Element'First));
end loop;
Text_Io.Put_Line ("Deleting...");
for I in Arr'Range loop
Arr (I) := Empty;
end loop;
exception
when E: others =>
Text_IO.Put_Line ("Exception: " &
Exceptions.Exception_Information (E));
end test;
next prev parent reply other threads:[~2004-10-11 8:59 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-10 21:33 Memory leak - What the ...? Alex R. Mosteo
2004-10-10 22:05 ` Marius Amado Alves
2004-10-11 8:18 ` Alex R. Mosteo
2004-10-11 11:04 ` Marius Amado Alves
2004-10-11 13:02 ` Martin Krischik
2004-10-11 8:25 ` Martin Krischik
2004-10-11 8:56 ` Martin Dowie
2004-10-11 12:59 ` Martin Krischik
2004-10-11 1:40 ` Stephen Leake
2004-10-11 8:59 ` Alex R. Mosteo [this message]
2004-10-11 18:24 ` Stephen Leake
2004-10-12 3:02 ` Brian May
2004-10-12 8:45 ` Jean-Pierre Rosen
[not found] ` <mailman.282.1097576360.390.comp.lang.ada@ada-france.org>
[not found] ` <uvegkc.jrg.ln@skymaster>
2004-10-12 12:31 ` Marius Amado Alves
2004-10-12 14:47 ` Alex R. Mosteo
2004-10-12 16:05 ` Marius Amado Alves
2004-10-12 19:37 ` Björn Persson
2004-10-12 22:10 ` Marius Amado Alves
[not found] ` <416C5646.1020506@netcabo.pt>
2004-10-13 0:17 ` Stephen Leake
[not found] ` <u655f1ng9.fsf@acm.org>
2004-10-13 6:24 ` Marius Amado Alves
[not found] ` <416C00D6.90402@netcabo.pt>
2004-10-13 0:14 ` Stephen Leake
[not found] ` <416BAFA4.7020400@netcabo.pt>
2004-10-13 0:07 ` Stephen Leake
2004-10-13 13:45 ` Hyman Rosen
2004-10-14 9:15 ` Martin Krischik
2004-10-14 17:21 ` Hyman Rosen
[not found] ` <uis9f1nw3.fsf@acm.org>
[not found] ` <mailman.301.1097650377.390.comp.lang.ada@ada-france.org>
2004-10-13 7:40 ` Dmitry A. Kazakov
2004-10-13 17:44 ` Mark Lorenzen
2004-10-14 8:03 ` Dmitry A. Kazakov
2004-10-18 0:33 ` Brian May
2004-10-12 12:05 ` Alex R. Mosteo
2004-10-13 0:12 ` Stephen Leake
2004-10-13 8:39 ` Pascal Obry
2004-10-13 13:11 ` Memory leak - What the ...? - FOUND Alex R. Mosteo
2004-10-17 0:45 ` Memory leak - What the ...? Brian May
2004-10-13 0:32 ` Matthew Heaney
2004-10-18 0:26 ` Brian May
2004-10-13 0:27 ` Matthew Heaney
2004-10-13 7:58 ` Martin Krischik
2004-10-13 13:01 ` Alex R. Mosteo
2004-10-13 0:25 ` Matthew Heaney
2004-10-13 12:26 ` Stephen Leake
2004-10-13 14:45 ` Matthew Heaney
2004-10-13 23:45 ` Brian May
2004-10-14 1:33 ` Jeffrey Carter
2004-10-11 8:04 ` Martin Dowie
2004-10-12 10:47 ` Alex R. Mosteo
2004-10-12 15:07 ` Alex R. Mosteo
2004-10-13 14:53 ` Matthew Heaney
-- strict thread matches above, loose matches on Subject: below --
2004-10-11 9:50 Christoph Karl Walter Grein
2004-10-11 10:21 Christoph Karl Walter Grein
2004-10-14 4:30 Christoph Karl Walter Grein
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