[mapserver-users] gmap demo segfault

[Caffeinate The World]

ns01$ shp2img -m gmap75.map -o testoutput.png
Segmentation fault - core dumped
I think it's having problems loading the 'DATA bath_mapserver.tif
' file. I converted the 'bath_mapserver.tif' to 'bath_mapserver.png' and replaced that DATA line and no more coredump.
I'm wondering if this is due to mapserver or libtiff.
 Dylan Keon <keon at nacse.org> wrote:Next, try running shp2img against your mapfile to see if it can process 
the TIFF. In case you don't know, shp2img is packaged with MapServer, 
and is a command-line utility that will parse the mapfile and render an 
output image. Do something like this command and then view the output 
image to see if it works:

% shp2img -m my_mapfile.map -o output.png

--Dylan


Caffeinate The World wrote:
> I further narrowed down the cause of the problem. I commented out the 
> line below:
> 
> DATA bath_mapserver.tif
> 
> and the applet loaded. There seems to be a problem with loading tif files.
> 
> LAYER
> NAME bathymetry
> METADATA
> "DESCRIPTION" "Elevation/Bathymetry"
> END
> TYPE RASTER
> STATUS ON
> # DATA bath_mapserver.tif
> END
> 
> */Caffeinate The World /* wrote:
> 
> I turned on --enable-debug on the mapsever compile only.. php cgi
> currently doesn't have it turned on:
> 
> ...
> Reading symbols from /usr/local/lib/libproj.so...done.
> Reading symbols from /usr/pkg/lib/libtiff.so.3...done.
> #0 0x16220d06c in drawTIFF (map=0x0, layer=0x1a5, img=0x120456000,
> filename=0x0) at mapraster.c:828
> ---Type to continue, or q to quit---
> 828 vv=buf[xi+boffset];
> (gdb) bt
> #0 0x16220d06c in drawTIFF (map=0x0, layer=0x1a5, img=0x120456000,
> filename=0x0) at mapraster.c:828
> warning: Hit heuristic-fence-post without finding
> warning: enclosing function for address 0x1202fd370
> This warning occurs if you are debugging a function without any symbols
> (for example, in a stripped executable). In that case, you may wish to
> increase the size of the search with the `set heuristic-fence-post'
> command.
> 
> */Caffeinate The World /* wrote:
> 
> I narrowed the segfault down to this section of gmap75.map:
> 
> LAYER
> NAME grid
> METADATA
> "DESCRIPTION" "Grid"
> END
> TYPE LINE
> STATUS OFF
> DATA grid
> CLASS
> NAME "Graticule"
> COLOR 0 0 0
> END
> END # Layer
> 
> I still don't know what's causing the segfault. The php.core I
> have doesn't have debug on to do a backtrace.
> 
> */Caffeinate The World /* wrote:
> 
> mapserver-3.6.3
> php-4.2.2 (cgi and apache mod)
> NetBSD-Alpha-1.5.2
> Apache-1.3.22
> 
> I got mapserver going and the default demo working. Then I
> tried the gmap-3.6 demo and it segmentation fault at the
> line denoted by "HERE" below :
> 
> function GMapDrawMap()
> {
> GLOBAL $gpoMap, $gbShowQueryResults;
> GLOBAL $gbIsHtmlMode;
> GLOBAL $gszCommand, $gszZoomBoxExt;
> GLOBAL $gAppletImgFmt, $gImagesFmt;
> 
> if ($gbShowQueryResults)
> $img = $gpoMap->drawQuery();
> else
> $img = $gpoMap->draw(); //<--------HERE
> 



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