[Proj] possible memory leak in pj_free ??

[Frank Warmerdam]

Sue Dettling wrote:
> Hi, 
> I am using the debian linux (etch) version of proj.
> I instantiate a projection object with the following:
> 
> if ( (_inputProj = pj_init(6,inputPrjArgs )) == NULL)
>   {
>     cerr << "ProjInfo::_projectData(): ERROR: Failed to initialize Proj.4 "
> 	 << "projection object." << endl;
>     return(1);
>   }
> 
> where inputPrjArgs[] = {"proj=laea", "lat_0=38", "lon_0=-98", "x_0=0", "y_0=0", "units=m"}.
> 
> It seems to work fine based on output data.
> 
> I free the projection with:
> 
> if (_inputProj)
>     pj_free(_inputProj); 
> 
> In stepping through with a debugger I see that the pj_free call is made
> however when using valgrind to check for memory leaks I get:
> 
> =17191== 48 bytes in 2 blocks are definitely lost in loss record 1 of 1
> ==17191==    at 0x401D38B: malloc (vg_replace_malloc.c:149)
> ==17191==    by 0x41ECB2B: pj_malloc (in /usr/lib/libproj.so.0.5.0)
> ==17191==    by 0x41EA5EF: pj_authset (in /usr/lib/libproj.so.0.5.0)
> ==17191==    by 0x41CD4A9: pj_laea (in /usr/lib/libproj.so.0.5.0)
> ==17191==    by 0x41EC577: pj_init (in /usr/lib/libproj.so.0.5.0)
> ==17191==    by 0x805C505: ProjInfo::_initializeProj4() (ProjInfo.cc:453)
> ==17191==    by 0x805E51F: ProjInfo::init() (ProjInfo.cc:84)
> ==17191==    by 0x8052449: NcfReader::_getGriddedData() (NcfReader.cc:683)
> ==17191==    by 0x8052FD0: NcfReader::readFile() (NcfReader.cc:169)
> ==17191==    by 0x80504B5: NetCDF2Mdv::_processData(char*) (NetCDF2Mdv.cc:211)
> ==17191==    by 0x80509D9: NetCDF2Mdv::Run() (NetCDF2Mdv.cc:173)
> ==17191==    by 0x804F51D: main (Main.cc:67)
> 
> 
> Are there any known or possible leaks with pj_free ?

Sue,

I suspect you are seeing the issue fixed in this changelog entry.

2007-04-04  Frank Warmerdam  <warmerdam at pobox.com>

	* src/PJ_laea.c: Fix memory leak of apa field.

Best regards,
-- 
---------------------------------------+--------------------------------------
I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush    | President OSGeo, http://osgeo.org