Blocks lost in SDL_CreateRGBASurface

SDL Development
1

Any idea why valgrind would report:

==26170== 442,496 (240 direct, 442,256 indirect) bytes in 4 blocks are
definitely lost in loss record 135 of 450
==26170== at 0x4022AB8: malloc (vg_replace_malloc.c:207)
==26170== by 0x41DA6BB: SDL_CreateRGBSurface (in
/usr/lib/libSDL-1.2.so.0.11.1)
==26170== by 0x40E2031: AG_SurfaceRGBA (in
/usr/local/lib/libag_gui.so.1.0.0)
==26170== by 0x807D548: scale_buffer_to_ag_surface (wswidget.c:44)
==26170== by 0x807E537: move_to_region_xy (wswidget.c:196)
==26170== by 0x807EF12: WholeslideViewerNew (wswidget.c:304)
==26170== by 0x8051444: CreateSlideViewer (gui_wholeslide.c:405)
==26170== by 0x8083596: MouseButtonDown (ws_thumb2.c:118)
==26170== by 0x4193D21: AG_PostEvent (in
/usr/local/lib/libag_core.so.1.0.0)
==26170== by 0x40E6574: AG_WidgetMouseButtonDown (in
/usr/local/lib/libag_gui.so.1.0.0)
==26170== by 0x40E64A6: AG_WidgetMouseButtonDown (in
/usr/local/lib/libag_gui.so.1.0.0)
==26170== by 0x40E64A6: AG_WidgetMouseButtonDown (in
/usr/local/lib/libag_gui.so.1.0.0)–
H. E. Gilliland III

“Astronomy compels the soul to look upwards and leads us from this world to
another.”
? Plato

2

That implies to me that you’re not freeing the surface that gets created.On Fri, Dec 12, 2008 at 2:38 AM, Herbert Elwood Gilliland III < herb.gilliland at gmail.com> wrote:

Any idea why valgrind would report:

==26170== 442,496 (240 direct, 442,256 indirect) bytes in 4 blocks are
definitely lost in loss record 135 of 450
==26170== at 0x4022AB8: malloc (vg_replace_malloc.c:207)
==26170== by 0x41DA6BB: SDL_CreateRGBSurface (in
/usr/lib/libSDL-1.2.so.0.11.1)
==26170== by 0x40E2031: AG_SurfaceRGBA (in
/usr/local/lib/libag_gui.so.1.0.0)
==26170== by 0x807D548: scale_buffer_to_ag_surface (wswidget.c:44)
==26170== by 0x807E537: move_to_region_xy (wswidget.c:196)
==26170== by 0x807EF12: WholeslideViewerNew (wswidget.c:304)
==26170== by 0x8051444: CreateSlideViewer (gui_wholeslide.c:405)
==26170== by 0x8083596: MouseButtonDown (ws_thumb2.c:118)
==26170== by 0x4193D21: AG_PostEvent (in
/usr/local/lib/libag_core.so.1.0.0)
==26170== by 0x40E6574: AG_WidgetMouseButtonDown (in
/usr/local/lib/libag_gui.so.1.0.0)
==26170== by 0x40E64A6: AG_WidgetMouseButtonDown (in
/usr/local/lib/libag_gui.so.1.0.0)
==26170== by 0x40E64A6: AG_WidgetMouseButtonDown (in
/usr/local/lib/libag_gui.so.1.0.0)

–
H. E. Gilliland III

“Astronomy compels the soul to look upwards and leads us from this world to
another.”
? Plato

SDL mailing list
SDL at lists.libsdl.org
http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org

3

Hello,

As stated in the Valgrind manual, Valgrind nor many of the system
libraries commonly used, are not perfect.

Generally, you have to analyse the results of VG report and determine
whether the error is in your code or in a library.

The error looks like it’s in “libag_gui” if this is the code you’re
debugging, that’s great, you’ve find a bug. If not, you need to do 2
things; report the bug to the library provider and add a filter to the
Valgrind configuration to remove it so you can focus on “your” errors.

Happy 'Griding!

(P.S. I hope this qualifies as a “nice” RTFM :wink:

2008/12/12 Josh Matthews :> That implies to me that you’re not freeing the surface that gets created.

On Fri, Dec 12, 2008 at 2:38 AM, Herbert Elwood Gilliland III <herb.gilliland at gmail.com> wrote:

Any idea why valgrind would report:

==26170== 442,496 (240 direct, 442,256 indirect) bytes in 4 blocks are
definitely lost in loss record 135 of 450
==26170== at 0x4022AB8: malloc (vg_replace_malloc.c:207)
==26170== by 0x41DA6BB: SDL_CreateRGBSurface (in
/usr/lib/libSDL-1.2.so.0.11.1)
==26170== by 0x40E2031: AG_SurfaceRGBA (in
/usr/local/lib/libag_gui.so.1.0.0)
==26170== by 0x807D548: scale_buffer_to_ag_surface (wswidget.c:44)
==26170== by 0x807E537: move_to_region_xy (wswidget.c:196)
==26170== by 0x807EF12: WholeslideViewerNew (wswidget.c:304)
==26170== by 0x8051444: CreateSlideViewer (gui_wholeslide.c:405)
==26170== by 0x8083596: MouseButtonDown (ws_thumb2.c:118)
==26170== by 0x4193D21: AG_PostEvent (in
/usr/local/lib/libag_core.so.1.0.0)
==26170== by 0x40E6574: AG_WidgetMouseButtonDown (in
/usr/local/lib/libag_gui.so.1.0.0)
==26170== by 0x40E64A6: AG_WidgetMouseButtonDown (in
/usr/local/lib/libag_gui.so.1.0.0)
==26170== by 0x40E64A6: AG_WidgetMouseButtonDown (in
/usr/local/lib/libag_gui.so.1.0.0)

–
H. E. Gilliland III

“Astronomy compels the soul to look upwards and leads us from this world
to another.”
? Plato

SDL mailing list
SDL at lists.libsdl.org
http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org

SDL mailing list
SDL at lists.libsdl.org
http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org