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From: yogeshwarsing@gmx.com
Newsgroups: comp.lang.ada
Subject: Re: memory leak with new GPS in GNAT GPL 2012 on Windows
Date: Sat, 30 Jun 2012 10:58:58 -0700 (PDT)
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Date: 2012-06-30T10:58:58-07:00
List-Id: <comp.lang.ada>

> I am using WinXP Family edition 32bits with SP3 on single core Celeron.
> I installed GNAT GPL 2012 but I noticed i must also change manually the e=
nvironment variable PATH to use the updated gcc (I have GNAT GPL 2011 insta=
lled). Otherwise GPS 2012 use the binaries from the 2011 distro.

When installing GNAT GPL 2012, the item: C:\GNAT\2012\bin is added in the W=
indows environment path. C:\GNAT\2011\bin will still be there but C:\GNAT\2=
012\bin will be written in the path BEFORE C:\GNAT\2011\bin and so GPS 2012=
 will use binaries from C:\GNAT\2012\bin.

I think if you take away C:\GNAT\2012\bin from the path and then try to com=
pile a program using the -gnat2012 switch (Project properties > switches > =
Ada) then it won't run as then the binaries from the 2011 distribution woul=
d be called and I do not think that the 2011 binaries were supporting the -=
gnat2012 switch.

> Task manager indicates 64 Megabytes of memory used by gps.exe with only 1=
 thread.
> I can compile and run several demos with or without tasking and no crash =
or leaks.
> I also noticed of 4 Kbyte increment of memory every second even when I do=
 nothing.
> I think the leak could come from the GTK library. A leak in GTK has alrea=
dy been
> reported on this forum.

In my case when running the simple program below, I find an increase of 48 =
kbyte every second even when GPS is idle. Here is the simple program that I=
 am running:

with System.Dim.MKS; use System.Dim.Mks;
with System.Dim.Mks_IO; use System.Dim.Mks_IO;
with Text_IO; use Text_IO;


procedure Free_Fall3 is
       subtype Acceleration is Mks_Type
       with Dimension =3D> ("m/s^2", Meter =3D> 1, Second =3D> -2, others =
=3D> 0);
       G : constant acceleration :=3D 127137.6 * km/(hour ** 2) ;
       T : Time :=3D 10.0/3600.0 * hour;
       Distance : length;

     begin
       Put ("Gravitational constant: ");
       Put (G, Aft =3D> 2, Exp =3D> 0); Put_Line ("");
       Put ("Time: ");
       Put (T, fore =3D> 4, Aft =3D> 4, Exp =3D> 0); Put_Line ("");
       Distance :=3D 0.5 * G * T ** 2;
       Put ("distance travelled in 10 seconds (or 10/3600 hour) of free fal=
l ");
       Put (Distance, fore =3D> 4, Aft =3D> 4, Exp =3D> 0);
       Put_Line ("");
end Free_Fall3;


Thanks.