strange memory leak report

[jstph]

Magick, I experienced a strange memory leak report.

I create an empty main method.

Code: Select all

#include "stdafx.h"
#include "magick/MagickCore.h"
#include <tchar.h>
#include "vld.h"

int _tmain(int argc, _TCHAR* argv[])
{
	return 0;
}

stdafx.h is empty.
vld.h is memory leak detector.

when run in the debug mode, it reports memory leak from glib.

my IM build is 6.8.8, muti-thread static lib.
my OS is windows 8
my IDE is MS visual studio 2010.

I used _CrtDumpMemoryLeaks originally, and it reports memory leak. I thought it may be false report. So I installed vld and it reports same thing. I checked my build setting, doesn't seem like there is anything conflicted. I posted one of the leak trace. The rest are similar, basically any memory allocated by glib will be reported as leak. I have no idea what I did wrong, hope you can shed some light no. Thanks in advance.

Call Stack:

• f:\dd\vctools\crt_bld\self_x86\crt\src\dbgcalloc.c (56): calloc
  d:\plugins\image\imagemagick-windows\imagemagick-6.8.8\glib\glib\gmem.c (134): g_malloc0
  d:\plugins\image\imagemagick-windows\imagemagick-6.8.8\glib\gobject\gtype.c (1121): type_data_make_W
  d:\plugins\image\imagemagick-windows\imagemagick-6.8.8\glib\gobject\gtype.c (2755): g_type_register_static
  d:\plugins\image\imagemagick-windows\imagemagick-6.8.8\glib\gobject\gparam.c (1431): g_param_type_register_static
  d:\plugins\image\imagemagick-windows\imagemagick-6.8.8\glib\gobject\gparamspecs.c (1477): _g_param_spec_types_init
  d:\plugins\image\imagemagick-windows\imagemagick-6.8.8\glib\gobject\gtype.c (4401): gobject_init_ctor
  d:\plugins\image\imagemagick-windows\imagemagick-6.8.8\glib\gobject\gtype.c (4313): gobject_init_ctor_wrapper
  f:\dd\vctools\crt_bld\self_x86\crt\src\crt0dat.c (873): _initterm
  f:\dd\vctools\crt_bld\self_x86\crt\src\crt0dat.c (288): _cinit
  f:\dd\vctools\crt_bld\self_x86\crt\src\crt0.c (262): __tmainCRTStartup
  f:\dd\vctools\crt_bld\self_x86\crt\src\crt0.c (189): wmainCRTStartup
  0x76E5850D (File and line number not available): BaseThreadInitThunk
  0x77D5BF39 (File and line number not available): RtlInitializeExceptionChain
  0x77D5BF0C (File and line number not available): RtlInitializeExceptionChain
  Data:
  40 15 8C 05 28 00 00 00 00 00 00 00 00 00 00 00 @...(... ........
  00 00 00 00 B0 33 2F 01 00 00 00 00 E0 97 9E 05 .....3/. ........
  00 00 00 00 28 00 00 00 04 00 00 00 E0 AA 2B 01 ....(... ......+.

[jstph]

I did a little bit research on this issue. It looks like Glib will release its memory block at the exit time, which probably after the vld memory check and _crt call. If that is the case, those memory allocated by Glib would be considered as leak. I read into Glib source code, it seems like Valgrind has similar problem, so Glib add special code to turns some part off for Valgrind.