Re: Valgrind is grinding my gears

[Bernhard Schuster <schuster bernhard gmail com>]

Setting the env var G_SLICE=always-malloc helps a lot (at least from my 
experience).

Also have a look at https://wiki.gnome.org/Valgrind for more stuff like 
suppression files for various applications, maybe you can derive your 
own from one of those.

If you want to really want get into the nitty gritty details, there is 
no way around the valgrind/memcheck manual.

Best

Bernhard

On Tue, Nov 5, 2013 at 7:15 PM, David Buchan <pdbuchan yahoo com> wrote:
> Sorry for peppering you with emails but I just noticed this statement:
>
> "For newly written code it is recommended
> to use the new g_slice API instead of g_malloc() and
> friends, as long as objects are not resized during their lifetime and 
> the
> object size used at allocation time is still available when freeing" 
> - https://developer.gnome.org/glib/unstable/glib-Memory-Slices.html
>
> I do indeed change dimensions of arrays declared within my struct (a 
> lot, in fact). Could this be the cause?
>
>
> ________________________________
>  From: David Buchan <pdbuchan yahoo com>
> To: gtk-app-devel-list list <gtk-app-devel-list gnome org> 
> Sent: Tuesday, November 5, 2013 1:09 PM
> Subject: Re: Valgrind is grinding my gears
>  
>
>
> Perhaps relevant, is that I have a large struct which I use to pass 
> stuff amongst functions and callbacks and I allocate memory for it in 
> main() thus:
>
>   // Allocate data structure
>   data = g_slice_new (MyData);
>
> and then free it at the end:
>
>   g_slice_free (MyData, data);
>
> Maybe Valgrind has trouble with g-sliced memory?
>
>
>
> ________________________________
>  From: David Buchan <pdbuchan yahoo com>
> To: gtk-app-devel-list list <gtk-app-devel-list gnome org> 
> Sent: Tuesday, November 5, 2013 12:47 PM
> Subject: Valgrind is grinding my gears
>  
>
> I have a rather large program I've written in C language which uses 
> GTK+2. My Makefile has:
>
> CCFLAGS = `pkg-config --cflags gtk+-2.0 gmodule-2.0`
> LIBS    = `pkg-config --libs   gtk+-2.0 gmodule-2.0`
>
> GCC compiles it without warnings using flags:
>
> -Wall -O -Wuninitialized
>
> My program has several user interface files prepared using
>  Glade.
>
> I use the program quite a bit and have no stability issues.
>
> But when I invoke Valgrind at runtime, I get a lot of errors which I 
> can't make any sense of.
>
> I have grabbed a small sample of them here:
>
> http://pdbuchan.com/valgrind.txt
>
> I don't like ignoring errors and warnings, but I don't know what to 
> do with these.
>
> Has anybody else come across these types of Valgrind notifications?
>
>
> Dave
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