On Mon, 2011-04-18 at 16:14 +0200, Csaba Halász wrote: > On Mon, Apr 18, 2011 at 1:38 PM, Christian Schmitt <ch...@ilovelinux.de> > wrote: > > Csaba Halász wrote: > >> Info registers, and something like x/10i $eip (or $rip on 64 bit) > > Here you go (still on Atom), Phenom this evening. > > > > (gdb) info registers > > eax 0x0 0 > > > > (gdb) x/10i $eip > > => 0xb7fb8fdd <merge_left+9>: mov 0x14(%eax),%eax > > Hm, ok, that doesn't seem to be SSE related, it's just your everyday > NULL pointer. > Have to check source code to see how that can happen. >
Hi, Quite some time ago now ran into this NULL ptr passed to the merge_left() (internal) gpc library function, when trying to process dense (very detailed) data, but even after adding code 'protecting' against such a segfault, the resultant tile produced could not be displayed correctly by FG rendering engine. See the tile results here - http://geoffair.org/tmp/2892641.htm There were 2 types of 'bad' tiles, named by Cullam and I as (a) 'painters' Mondrian style, with parallel banding, and (b) 'spaghetti', where triangles cross each other in multiple layers... We suspected somewhere a 'short' is used instead of an 'int' counter, since it always seemed to happen when some component counts exceeded 65536 ;=(( But could NOT track it down... and anyway maybe this does not address the gpc library problem... However, Since there are now many scenery builders wanting to use the higher resolution data available, a fix at both levels, gpc polygon massaging, and fg rendering, would be VERY MUCH appreciated. Anything I can do to help... Regards, Geoff. ------------------------------------------------------------------------------ Benefiting from Server Virtualization: Beyond Initial Workload Consolidation -- Increasing the use of server virtualization is a top priority.Virtualization can reduce costs, simplify management, and improve application availability and disaster protection. Learn more about boosting the value of server virtualization. http://p.sf.net/sfu/vmware-sfdev2dev _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
