Am Wed, 18 Apr 2007 20:52:51 +0200 schrieb Mateusz Loskot: > Andreas Volz wrote: > > Hello, > > > > I've problems to parse WKB with GEOS. Here is my sample application: > > [...] > > It works in most cases, but sometimes the result values are broken > > or I get a segfault. So I used valgrind to get some more > > information. I got this as result: > > > > ==17755== Invalid read of size 4 > > ==17755== at 0x41327FE: geos::PrecisionModel::makePrecise(double) > > const (in /usr/lib/libgeos.so.2.2.3) ==17755== by 0x401D5D5A: ??? > > ==17755== Address 0x460A544 is 4 bytes inside a block of size 16 > > free'd ==17755== at 0x40212FA: operator delete(void*) > > (in /usr/lib/valgrind/x86-linux/vgpreload_memcheck.so) ==17755== > > by 0x4132695: geos::PrecisionModel::~PrecisionModel() > > (in /usr/lib/libgeos.so.2.2.3) ==17755== by 0x42F083B: (below > > main) (in /lib/libc-2.5.so) ==17755== > > > > ... and this as often as I read coordinates. > > > > Any ideas why PrecisionModel has this problem? A problem in GEOS > > WKBParser or my application? > > Andreas, > > Could you provide us with simple but generic program presenting the > problem? Ideally, if the example: > - refers only to GEOS, but not to any database > - shows values of coordinates causing the crash, just hardcoded in the > program > > Your code is not usable, because it's specific to your particular > environment and data.
I've created an example without database access: http://tux-style.de/osm/tmp/proj_test.zip Makefile proj_test.cpp data.bin - Binary dump of a database line into a file valgrind.txt - You see the problem only with valgrind (saved output) Tell me what else you need if I've not provided enough information. regards Andreas _______________________________________________ geos-devel mailing list geos-devel@geos.refractions.net http://geos.refractions.net/mailman/listinfo/geos-devel
