SWIGMapscript: glibc detected malloc memory corruption

[Umberto Nicoletti]

What distro are you using (this appears to be a detail too often forgotten) ?

See if you have a MALLOC_CHECK_ env variable set and then read
malloc's man page.

Regards,
Umberto

On 6/26/05, Geo-IT GmbH <info at geo-it.com> wrote:
> Dear experts,
> When trying to fetch a shapeObj after a queryByPoint using the shapeindex and
> tileindex from the resultCache in a Java mapscript program I get the following
> error terminating the whole VM:
> 
> *** glibc detected *** malloc(): memory corruption: 0x08314ed0 ***
> ./runshapetest40.sh: line 13: 26946 Aborted java ShapeObjTest40 $mapfile
> $layername
> 
> The program was:
> 
> // Standard imports
> import java.io.*;
> import java.util.*;
> import java.text.*;
> import edu.umn.gis.mapscript.*;
> 
> public class ShapeObjTest {
> 
>         String mapFile = null;
>         String layerName = null;
> 
> 
> static {
>         try {
>                 System.loadLibrary("mapscript");
>                 System.out.println("Mapscript lib loaded");
>         } catch (UnsatisfiedLinkError e) {
>                 e.printStackTrace();
>                 System.exit(1);
>         }
> }
> 
>         public ShapeObjTest() {
>         }
> 
> 
>         protected static void log(String msg) {
>                 System.out.println(msg);
>         }
>         protected static void usage() {
>                 System.out.println("USAGE: ShapeObjTest <mapfile> <layername>");
>         }
> 
>         public static void main (String args[] ) {
>                 if (args == null || args.length < 2) {
>                         usage();
>                         System.exit(1);
>                 }
>                 String mapFile = args[0];
>                 String layerName = args[1];
>         try {
>                 log("Creating map");
>                 mapObj map = new mapObj(mapFile);
>                 layerObj l = map.getLayerByName(layerName);
>                 l.open();
>                 log("Fetching shapeObj shapeindex 1 tileindex -1");
>                 shape = l.getFeature(1,-1);
>                 l.close();
>                 log("Fetch successful");
>         } catch (Exception ie) {
>                 ie.printStackTrace();
>                 System.exit(1);
>         }
>         }
> }
> 
> The log shows:
> Mapscript lib loaded
> Creating map
> Fetching shapeObj shapeindex 1 tileindex -1
> 
> Then the error appears on the console.
> 
> I use mapserver 4.6.0.
> 
> This is the mapfile: (It's the one from Itasca demo, but only with layer
> airports)
> MAP
>   #
>   # Start of map file
>   #
>   NAME "DEMO"
>   STATUS ON
>   EXTENT 388107.634400379 5203120.88405952 500896.339019834 5310243.30613897
>   SIZE 600 600
>   SHAPEPATH "data"
>   IMAGECOLOR 255 255 255
>   UNITS METERS
>   # you may need to change this to match your MapServer build
>   #IMAGETYPE PNG
>   #
>   # Projection definition, consult the PROJ.4 documentation for parameter
> discussion
>   #
>   PROJECTION
>     "proj=utm"
>     "ellps=GRS80"
>     "zone=15"
>     "north"
>     "no_defs"
> 
> #  OR:
>   #
>   #  "init=epsg:26915"
>   END
>   #
>   # Start of web interface definition (including WMS enabling metadata)
>   #
>   WEB
>     MINSCALE 1000
>     MAXSCALE 1550000
>     IMAGEPATH "/tmp"
>     IMAGEURL "/tmp"
>     HEADER "demo_header.html"
>     FOOTER "demo_footer.html"
>     TEMPLATE "demo.html"
>     METADATA
>       "WMS_TITLE"    "UMN MapServer Itasca Demo"
>       "WMS_ABSTRACT"    "This is the UMN MapServer demonstration application
> for Itasca County located in north central Minnesota."
>       "WMS_ACCESSCONSTRAINTS"    "none"
>       "WMS_ONLINERESOURCE"
> "http://localhost.localdomain/mapserver_demos/itasca/demo_init.html"
>       "WMS_SRS"    "EPSG:26915"
>     END
>   END
>   #
>   # Start of reference map
>   #
>   REFERENCE
>     STATUS ON
>     IMAGE "graphics/reference.gif"
>     SIZE 120 120
>     EXTENT 393234.393701263 5205405.16440722 495769.579718949 5307959.02579127
>     COLOR -1 -1 -1
>     OUTLINECOLOR 255 0 0
>   END
>   QUERYMAP
>     STATUS ON
>     SIZE 200 200
>     COLOR 255 0 0
>     STYLE HILITE
>   END
>   #
>   # Start of legend
>   #
>   LEGEND
>     STATUS ON
>     KEYSIZE 18 12
>     LABEL
>       TYPE BITMAP
>       SIZE MEDIUM
>       COLOR 0 0 89
>     END
>   END
>   #
>   # Start of scalebar
>   #
>   SCALEBAR
>     STATUS ON
>     COLOR 0 102 102
>     OUTLINECOLOR 102 255 0
>     BACKGROUNDCOLOR 255 51 102
>     IMAGECOLOR 255 255 255
>     TRANSPARENT OFF
>     UNITS MILES
>     INTERVALS 1
>     SIZE 80 2
>     STYLE 1
>     INTERLACE ON
>     LABEL
>       TYPE BITMAP
>       SIZE MEDIUM
>       COLOR 0 0 0
>     END
>   END
>   #
>   # Start of symbol definitions (we're only using a few)
>   #
>   SYMBOL
>     NAME "circle"
>     TYPE ELLIPSE
>     FILLED TRUE
>     POINTS
>        1 1
>     END
>   END
>   #
>   # Start of layer definitions
>   #
>   LAYER
>     NAME "airports"
>     STATUS OFF
>     DATA "airports"
>     TYPE POINT
>     TOLERANCE 5
>     HEADER "airports_header.html"
>     FOOTER "airports_footer.html"
>     TEMPLATE "ttt.html"
>     METADATA
>       "WMS_TITLE"    "Airports"
>       "WMS_ABSTRACT"    "Airport runways for Itasca County."
>       "WMS_SRS"    "EPSG:26915"
>     END
>     CLASS
>       NAME "Airports"
>       SYMBOL "circle"
>       COLOR 128 255 164
>       SIZE 7
>       TEMPLATE "airports.html"
>     END
>   END
> 
> 
> 
> Any help would be greatly appreciated.
> 
> Mit freundlichen Gruessen/Kind regards
> Andreas Paukner-Ruzicka
> (Geschaeftsfuehrer/Managing director)
> 
> **********************************************************
> Geo-IT GmbH   -   Geoinformatik, IT-Services
> Guggenberg 3, D-82380 Peissenberg
> Tel: 08803-498372, Fax: 08803-498373
> eMail: info at geo-it.com  -  Homepage: http://www.geo-it.com
> **********************************************************
>